ENGINE CONTROL SYSTEM GI

SECTION EC MA

EM

LC

CONTENTS FE

WITH EURO-OBD ON BOARD DIAGNOSTIC SYSTEM

CL
DESCRIPTION ...............................................................43
TROUBLE DIAGNOSIS - INDEX ....................................9
Introduction ................................................................43 MT
Alphabetical & P No. Index for DTC ...........................9
Two Trip Detection Logic ...........................................43
PRECAUTIONS .............................................................14
Emission-related Diagnostic Information ...................44
Supplemental Restraint System (SRS) ″AIR
NVIS (Nissan Vehicle Immobilizer System - AT
BAG″ and ″SEAT BELT PRE-TENSIONER″.............14
NATS) ........................................................................56
Precautions for On Board Diagnostic (OBD)
Malfunction Indicator Lamp (MIL)..............................57
System of Engine ......................................................14
OBD System Operation Chart ...................................57
AX
Engine Fuel & Emission Control System ..................15
CONSULT-II ...............................................................63
Precautions ................................................................16
Generic Scan Tool (GST) ..........................................75 SU
Wiring Diagrams and Trouble Diagnosis...................17
TROUBLE DIAGNOSIS - INTRODUCTION..................77
PREPARATION .............................................................18
Introduction ................................................................77
Special Service Tools ................................................18
Commercial Service Tools .........................................18
Work Flow..................................................................79 BR
TROUBLE DIAGNOSIS - BASIC INSPECTION ...........81
ENGINE AND EMISSION CONTROL OVERALL
Basic Inspection.........................................................81
SYSTEM.........................................................................20 ST
TROUBLE DIAGNOSIS - GENERAL
Engine Control Component Parts Location...............20
DESCRIPTION ...............................................................94
Circuit Diagram ..........................................................24
DTC Inspection Priority Chart....................................94
System Diagram ........................................................25 RS
Fail-safe Chart ...........................................................95
Vacuum Hose Drawing ..............................................26
Symptom Matrix Chart...............................................96
System Chart .............................................................27
ENGINE AND EMISSION BASIC CONTROL
CONSULT-II Reference Value in Data Monitor BT
Mode ........................................................................100
SYSTEM DESCRIPTION ...............................................28
Major Sensor Reference Graph in Data Monitor
Multiport Fuel Injection (MFI) System .......................28 HA
Mode ........................................................................102
Electronic Ignition (EI) System ..................................30
ECM Terminals and Reference Value .....................105
Air Conditioning Cut Control......................................31
TROUBLE DIAGNOSIS - SPECIFICATION VALUE ..113
Fuel Cut Control (at no load & high engine
Description ...............................................................113
SC
speed) ........................................................................32
Testing Condition .....................................................113
Evaporative Emission System ...................................32
Inspection Procedure...............................................113 EL
Positive Crankcase Ventilation ..................................35
Diagnostic Procedure ..............................................114
BASIC SERVICE PROCEDURE ...................................36
TROUBLE DIAGNOSIS FOR INTERMITTENT
Fuel Pressure Release ..............................................36
INCIDENT.....................................................................117 IDX
Fuel Pressure Check .................................................36
Description ...............................................................117
Fuel Pressure Regulator Check ................................37
Diagnostic Procedure ..............................................117
Injector .......................................................................38
TROUBLE DIAGNOSIS FOR POWER SUPPLY........118
How to Check Idle Speed and Ignition Timing..........39
Main Power Supply and Ground Circuit..................118
Idle Air Volume Learning ...........................................41
DTC P0100 MASS AIR FLOW SENSOR (MAFS)......125
Component Description ...........................................125
 CONTENTS (Cont’d)
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ..............................................159
Mode ........................................................................125 DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1
On Board Diagnosis Logic.......................................125 (FRONT) (RICH SHIFT MONITORING) ......................164
Possible Cause........................................................126 Component Description ...........................................164
DTC Confirmation Procedure ..................................126 CONSULT-II Reference Value in Data Monitor
Wiring Diagram ........................................................127 Mode ........................................................................164
Diagnostic Procedure ..............................................128 On Board Diagnosis Logic.......................................164
DTC P0110 INTAKE AIR TEMPERATURE Possible Cause........................................................165
SENSOR ......................................................................131 DTC Confirmation Procedure ..................................165
Component Description ...........................................131 Overall Function Check ...........................................166
On Board Diagnosis Logic.......................................131 Diagnostic Procedure ..............................................166
Possible Cause........................................................131 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1
DTC Confirmation Procedure ..................................131 (FRONT) (RESPONSE MONITORING).......................171
Wiring Diagram ........................................................133 Component Description ...........................................171
Diagnostic Procedure ..............................................134 CONSULT-II Reference Value in Data Monitor
DTC P0115 ENGINE COOLANT TEMPERATURE Mode ........................................................................171
SENSOR (ECTS) (CIRCUIT) .......................................136 On Board Diagnosis Logic.......................................171
Component Description ...........................................136 Possible Cause........................................................172
On Board Diagnosis Logic.......................................136 DTC Confirmation Procedure ..................................172
Possible Cause........................................................137 Overall Function Check ...........................................173
DTC Confirmation Procedure ..................................137 Wiring Diagram ........................................................174
Wiring Diagram ........................................................138 Diagnostic Procedure ..............................................176
Diagnostic Procedure ..............................................139 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1
DTC P0120 THROTTLE POSITION SENSOR ...........141 (FRONT) (HIGH VOLTAGE)........................................183
Description ...............................................................141 Component Description ...........................................183
CONSULT-II Reference Value in Data Monitor CONSULT-II Reference Value in Data Monitor
Mode ........................................................................141 Mode ........................................................................183
On Board Diagnosis Logic.......................................141 On Board Diagnosis Logic.......................................183
Possible Cause........................................................142 Possible Cause........................................................184
DTC Confirmation Procedure ..................................142 DTC Confirmation Procedure ..................................184
Wiring Diagram ........................................................144 Wiring Diagram ........................................................185
Diagnostic Procedure ..............................................145 Diagnostic Procedure ..............................................187
DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1
(FRONT) (CIRCUIT).....................................................148 HEATER (FRONT).......................................................191
Component Description ...........................................148 Description ...............................................................191
CONSULT-II Reference Value in Data Monitor CONSULT-II Reference Value in Data Monitor
Mode ........................................................................148 Mode ........................................................................191
On Board Diagnosis Logic.......................................148 On Board Diagnosis Logic.......................................191
Possible Cause........................................................149 Possible Cause........................................................191
DTC Confirmation Procedure ..................................149 DTC Confirmation Procedure ..................................192
Overall Function Check ...........................................150 Wiring Diagram ........................................................193
Wiring Diagram ........................................................151 Diagnostic Procedure ..............................................195
Diagnostic Procedure ..............................................153 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2
DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (REAR) (MIN. VOLTAGE MONITORING)...................198
(FRONT) (LEAN SHIFT MONITORING) .....................157 Component Description ...........................................198
Component Description ...........................................157 CONSULT-II Reference Value in Data Monitor
CONSULT-II Reference Value in Data Monitor Mode ........................................................................198
Mode ........................................................................157 On Board Diagnosis Logic.......................................198
On Board Diagnosis Logic.......................................157 Possible Cause........................................................199
Possible Cause........................................................158 DTC Confirmation Procedure ..................................199
DTC Confirmation Procedure ..................................158 Overall Function Check ...........................................200
Overall Function Check ...........................................159 Wiring Diagram ........................................................202

EC-2
 CONTENTS (Cont’d)
Diagnostic Procedure ..............................................204 DTC P0172 (BANK 1), P0175 (BANK 2) FUEL GI
DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 INJECTION SYSTEM FUNCTION (RICH) ..................255
(REAR) (MAX. VOLTAGE MONITORING) .................209 On Board Diagnosis Logic.......................................255
Component Description ...........................................209 Possible Cause........................................................255 MA
CONSULT-II Reference Value in Data Monitor DTC Confirmation Procedure ..................................255
Mode ........................................................................209 Wiring Diagram ........................................................257
On Board Diagnosis Logic.......................................209 Diagnostic Procedure ..............................................259
EM
Possible Cause........................................................210 DTC P0180 FUEL TANK TEMPERATURE
DTC Confirmation Procedure ..................................210 SENSOR ......................................................................262 LC
Overall Function Check ...........................................211 Component Description ...........................................262
Wiring Diagram ........................................................213 On Board Diagnosis Logic.......................................262
Diagnostic Procedure ..............................................215 Possible Cause........................................................262
DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 DTC Confirmation Procedure ..................................263
(REAR) (RESPONSE MONITORING).........................220 Wiring Diagram ........................................................264
Component Description ...........................................220 Diagnostic Procedure ..............................................265 FE
CONSULT-II Reference Value in Data Monitor DTC P0300 - P0306 NO. 6 - 1 CYLINDER
Mode ........................................................................220 MISFIRE, MULTIPLE CYLINDER MISFIRE ...............267 CL
On Board Diagnosis Logic.......................................220 On Board Diagnosis Logic.......................................267
Possible Cause........................................................221 Possible Cause........................................................267
DTC Confirmation Procedure ..................................221 DTC Confirmation Procedure ..................................268 MT
Overall Function Check ...........................................222 Diagnostic Procedure ..............................................268
Wiring Diagram ........................................................224 DTC P0325 KNOCK SENSOR (KS) ...........................275
Diagnostic Procedure ..............................................226 Component Description ...........................................275 AT
DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 On Board Diagnosis Logic.......................................275
(REAR) (HIGH VOLTAGE) ..........................................231 Possible Cause........................................................275
AX
Component Description ...........................................231 DTC Confirmation Procedure ..................................275
CONSULT-II Reference Value in Data Monitor Wiring Diagram ........................................................276
Mode ........................................................................231 Diagnostic Procedure ..............................................277 SU
On Board Diagnosis Logic.......................................231 DTC P0335 CRANKSHAFT POSITION SENSOR
Possible Cause........................................................232 (CKPS) (POS) ..............................................................280
DTC Confirmation Procedure ..................................232 Component Description ...........................................280 BR
Overall Function Check ...........................................232 CONSULT-II Reference Value in Data Monitor
Wiring Diagram ........................................................234 Mode ........................................................................280
Diagnostic Procedure ..............................................236 On Board Diagnosis Logic.......................................280
ST
DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 Possible Cause........................................................280
HEATER (REAR) .........................................................240 DTC Confirmation Procedure ..................................281 RS
Description ...............................................................240 Wiring Diagram ........................................................282
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ..............................................283
Mode ........................................................................240 DTC P0340 CAMSHAFT POSITION SENSOR BT
On Board Diagnosis Logic.......................................240 (CMPS) (PHASE).........................................................288
Possible Cause........................................................240 Component Description ...........................................288
DTC Confirmation Procedure ..................................241 On Board Diagnosis Logic.......................................288 HA
Wiring Diagram ........................................................242 Possible Cause........................................................288
Diagnostic Procedure ..............................................244 DTC Confirmation Procedure ..................................288
SC
DTC P0171 (BANK 1), P0174 (BANK 2) FUEL Wiring Diagram ........................................................290
INJECTION SYSTEM FUNCTION (LEAN) .................247 Diagnostic Procedure ..............................................291
On Board Diagnosis Logic.......................................247 DTC P0420 (BANK 1), P0430 (BANK 2) THREE EL
Possible Cause........................................................247 WAY CATALYST FUNCTION .....................................294
DTC Confirmation Procedure ..................................247 On Board Diagnosis Logic.......................................294
Wiring Diagram ........................................................249 Possible Cause........................................................294 IDX
Diagnostic Procedure ..............................................251 DTC Confirmation Procedure ..................................295
Overall Function Check ...........................................295

EC-3
 CONTENTS (Cont’d)
Diagnostic Procedure ..............................................296 Possible Cause........................................................329
DTC P0443 EVAP CANISTER PURGE VOLUME DTC Confirmation Procedure ..................................329
CONTROL SOLENOID VALVE (CIRCUIT).................299 Wiring Diagram ........................................................331
Description ...............................................................299 Diagnostic Procedure ..............................................332
CONSULT-II Reference Value in Data Monitor DTC P1217 ENGINE OVER TEMPERATURE
Mode ........................................................................299 (OVERHEAT) ...............................................................335
On Board Diagnosis Logic.......................................300 System Description..................................................335
Possible Cause........................................................300 CONSULT-II Reference Value in Data Monitor
DTC Confirmation Procedure ..................................300 Mode ........................................................................336
Wiring Diagram ........................................................301 On Board Diagnosis Logic.......................................336
Diagnostic Procedure ..............................................302 Possible Cause........................................................336
DTC P0500 VEHICLE SPEED SENSOR (VSS) .........305 Overall Function Check ...........................................337
Component Description ...........................................305 Wiring Diagram ........................................................339
On Board Diagnosis Logic.......................................305 Diagnostic Procedure ..............................................341
Possible Cause........................................................305 Main 12 Causes of Overheating..............................352
DTC Confirmation Procedure ..................................305 DTC P1320 IGNITION SIGNAL...................................353
Overall Function Check ...........................................306 Component Description ...........................................353
Wiring Diagram ........................................................307 On Board Diagnosis Logic.......................................353
Diagnostic Procedure ..............................................308 Possible Cause........................................................353
DTC P0505 IDLE AIR CONTROL VALVE (IACV) - DTC Confirmation Procedure ..................................353
AUXILIARY AIR CONTROL (AAC) VALVE ...............309 Wiring Diagram ........................................................355
Description ...............................................................309 Diagnostic Procedure ..............................................358
CONSULT-II Reference Value in Data Monitor DTC P1335 CRANKSHAFT POSITION SENSOR
Mode ........................................................................310 (CKPS) (REF) ..............................................................364
On Board Diagnosis Logic.......................................310 Component Description ...........................................364
Possible Cause........................................................310 CONSULT-II Reference Value in Data Monitor
DTC Confirmation Procedure ..................................310 Mode ........................................................................364
Wiring Diagram ........................................................312 On Board Diagnosis Logic.......................................364
Diagnostic Procedure ..............................................313 Possible Cause........................................................365
DTC P0510 CLOSED THROTTLE POSITION DTC Confirmation Procedure ..................................365
SWITCH .......................................................................318 Wiring Diagram ........................................................366
Component Description ...........................................318 Diagnostic Procedure ..............................................367
CONSULT-II Reference Value in Data Monitor DTC P1336 CRANKSHAFT POSITION SENSOR
Mode ........................................................................318 (CKPS) (POS) (COG) ..................................................370
On Board Diagnosis Logic.......................................318 Component Description ...........................................370
Possible Cause........................................................318 CONSULT-II Reference Value in Data Monitor
DTC Confirmation Procedure ..................................319 Mode ........................................................................370
Overall Function Check ...........................................319 On Board Diagnosis Logic.......................................370
Wiring Diagram ........................................................321 Possible Cause........................................................370
Diagnostic Procedure ..............................................322 DTC Confirmation Procedure ..................................371
DTC P0605 ECM .........................................................326 Wiring Diagram ........................................................372
Component Description ...........................................326 Diagnostic Procedure ..............................................373
On Board Diagnosis Logic.......................................326 DTC P1605 A/T DIAGNOSIS COMMUNICATION
Possible Cause........................................................326 LINE .............................................................................378
DTC Confirmation Procedure ..................................326 Component Description ...........................................378
Diagnostic Procedure ..............................................327 On Board Diagnosis Logic.......................................378
DTC P1131 SWIRL CONTROL VALVE CONTROL Possible Cause........................................................378
SOLENOID VALVE......................................................328 DTC Confirmation Procedure ..................................378
Description ...............................................................328 Wiring Diagram ........................................................379
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ..............................................380
Mode ........................................................................329 DTC P1706 PARK/NEUTRAL POSITION (PNP)
On Board Diagnosis Logic.......................................329 SWITCH .......................................................................381

EC-4
 CONTENTS (Cont’d)
Component Description ...........................................381 Wiring Diagram ........................................................428 GI
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ..............................................429
Mode ........................................................................381 ELECTRONIC CONTROLLED ENGINE MOUNT.......433
On Board Diagnosis Logic.......................................381 System Description..................................................433 MA
Possible Cause........................................................381 CONSULT-II Reference Value in Data Monitor
DTC Confirmation Procedure ..................................381 Mode ........................................................................433
Overall Function Check ...........................................382 Wiring Diagram ........................................................434
EM
Wiring Diagram ........................................................383 Diagnostic Procedure ..............................................435
Diagnostic Procedure ..............................................384 POWER STEERING OIL PRESSURE SWITCH.........437 LC
ABSOLUTE PRESSURE SENSOR ............................386 Component Description ...........................................437
Component Description ...........................................386 CONSULT-II Reference Value in Data Monitor
Wiring Diagram ........................................................387 Mode ........................................................................437
Diagnostic Procedure ..............................................388 Wiring Diagram ........................................................438
EVAP CANISTER PURGE VOLUME CONTROL Diagnostic Procedure ..............................................439
SOLENOID VALVE......................................................392 REFRIGERANT PRESSURE SENSOR ......................442 FE
Description ...............................................................392 Description ...............................................................442
CONSULT-II Reference Value in Data Monitor Wiring Diagram ........................................................443 CL
Mode ........................................................................392 Diagnostic Procedure ..............................................444
Wiring Diagram ........................................................393 ELECTRICAL LOAD SIGNAL.....................................446
Diagnostic Procedure ..............................................394 Wiring Diagram ........................................................446 MT
A/T COMMUNICATION LINE......................................398 Diagnostic Procedure ..............................................447
System Description..................................................398 MIL & DATA LINK CONNECTORS ............................451
Wiring Diagram ........................................................399 Wiring Diagram ........................................................451 AT
Diagnostic Procedure ..............................................400 SERVICE DATA AND SPECIFICATIONS (SDS) .......452
SWIRL CONTROL VALVE CONTROL SOLENOID Fuel Pressure Regulator..........................................452
AX
VALVE..........................................................................402 Idle Speed and Ignition Timing................................452
Description ...............................................................402 Mass Air Flow Sensor..............................................452
CONSULT-II Reference Value in Data Monitor Engine Coolant Temperature Sensor ......................452 SU
Mode ........................................................................403 Heated Oxygen Sensor 1 Heater (front) .................452
Wiring Diagram ........................................................404 Fuel Pump ...............................................................452
Diagnostic Procedure ..............................................405 IACV-AAC Valve ......................................................452 BR
VARIABLE INDUCTION AIR CONTROL SYSTEM Injector .....................................................................452
(VIAS)...........................................................................411 Resistor....................................................................452
Description ...............................................................411 Throttle Position Sensor ..........................................453
ST
Wiring Diagram ........................................................413 Calculated Load Value.............................................453
Diagnostic Procedure ..............................................414 Intake Air Temperature Sensor................................453 RS
INJECTOR ...................................................................417 Heated Oxygen Sensor 2 Heater (rear) ..................453
Component Description ...........................................417 Crankshaft Position Sensor (REF) ..........................453
CONSULT-II Reference Value in Data Monitor Fuel Tank Temperature Sensor ...............................453 BT
Mode ........................................................................417 Camshaft Position Sensor (PHASE) .......................453
Wiring Diagram ........................................................418
Diagnostic Procedure ..............................................419 WITHOUT EURO-OBD
HA
START SIGNAL...........................................................423
CONSULT-II Reference Value in Data Monitor TROUBLE DIAGNOSIS - INDEX ................................454
Alphabetical & P No. Index for DTC .......................454 SC
Mode ........................................................................423
Wiring Diagram ........................................................424 PRECAUTIONS ...........................................................456
Supplemental Restraint System (SRS) ″AIR
Diagnostic Procedure ..............................................425 EL
FUEL PUMP.................................................................427 BAG″ and ″SEAT BELT PRE-TENSIONER″...........456
System Description..................................................427 Precautions for On Board Diagnostic (OBD)
Component Description ...........................................427 System of Engine ....................................................456 IDX
CONSULT-II Reference Value in Data Monitor Engine Fuel & Emission Control System ................457
Mode ........................................................................427 Precautions ..............................................................458
Wiring Diagrams and Trouble Diagnosis.................459

EC-5
 CONTENTS (Cont’d)
PREPARATION ...........................................................460 TROUBLE DIAGNOSIS FOR INTERMITTENT
Special Service Tools ..............................................460 INCIDENT.....................................................................566
Commercial Service Tools .......................................460 Description ...............................................................566
ENGINE AND EMISSION CONTROL OVERALL Diagnostic Procedure ..............................................566
SYSTEM.......................................................................462 TROUBLE DIAGNOSIS FOR POWER SUPPLY........567
Engine Control Component Parts Location.............462 Main Power Supply and Ground Circuit..................567
Circuit Diagram ........................................................467 DTC P0100 MASS AIR FLOW SENSOR (MAFS)......574
System Diagram ......................................................468 Component Description ...........................................574
Vacuum Hose Drawing ............................................471 CONSULT-II Reference Value in Data Monitor
System Chart ...........................................................473 Mode ........................................................................574
ENGINE AND EMISSION BASIC CONTROL On Board Diagnosis Logic.......................................574
SYSTEM DESCRIPTION .............................................474 Possible Cause........................................................575
Multiport Fuel Injection (MFI) System .....................474 DTC Confirmation Procedure ..................................575
Electronic Ignition (EI) System ................................476 Wiring Diagram ........................................................577
Air Conditioning Cut Control....................................477 Diagnostic Procedure ..............................................578
Fuel Cut Control (at no load & high engine DTC P0115 ENGINE COOLANT TEMPERATURE
speed) ......................................................................478 SENSOR (ECTS) (CIRCUIT) .......................................581
Evaporative Emission System .................................478 Component Description ...........................................581
Positive Crankcase Ventilation ................................482 On Board Diagnosis Logic.......................................581
BASIC SERVICE PROCEDURE .................................483 Possible Cause........................................................582
Fuel Pressure Release ............................................483 DTC Confirmation Procedure ..................................582
Fuel Pressure Check ...............................................484 Wiring Diagram ........................................................583
Fuel Pressure Regulator Check ..............................484 Diagnostic Procedure ..............................................584
Injector .....................................................................485 DTC P0120 THROTTLE POSITION SENSOR ...........586
How to Check Idle Speed and Ignition Timing........486 Description ...............................................................586
Idle Air Volume Learning .........................................488 CONSULT-II Reference Value in Data Monitor
ON BOARD DIAGNOSTIC SYSTEM Mode ........................................................................586
DESCRIPTION .............................................................491 On Board Diagnosis Logic.......................................586
Introduction ..............................................................491 Possible Cause........................................................587
Two Trip Detection Logic .........................................491 DTC Confirmation Procedure ..................................587
Emission-related Diagnostic Information .................491 Wiring Diagram ........................................................589
Malfunction Indicator Lamp (MIL)............................494 Diagnostic Procedure ..............................................590
CONSULT-II .............................................................499 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1
TROUBLE DIAGNOSIS - INTRODUCTION................510 (FRONT) (CIRCUIT).....................................................595
Introduction ..............................................................510 Component Description ...........................................595
Work Flow................................................................512 CONSULT-II Reference Value in Data Monitor
TROUBLE DIAGNOSIS - BASIC INSPECTION .........514 Mode ........................................................................595
Basic Inspection.......................................................514 On Board Diagnosis Logic.......................................595
TROUBLE DIAGNOSIS - GENERAL Possible Cause........................................................596
DESCRIPTION .............................................................543 Overall Function Check ...........................................596
Fail-safe Chart .........................................................543 Wiring Diagram ........................................................597
Symptom Matrix Chart.............................................544 Diagnostic Procedure ..............................................599
CONSULT-II Reference Value in Data Monitor DTC P0325 KNOCK SENSOR (KS) ...........................604
Mode ........................................................................548 Component Description ...........................................604
Major Sensor Reference Graph in Data Monitor On Board Diagnosis Logic.......................................604
Mode ........................................................................550 Possible Cause........................................................604
ECM Terminals and Reference Value .....................553 DTC Confirmation Procedure ..................................604
TROUBLE DIAGNOSIS - SPECIFICATION VALUE ..562 Wiring Diagram ........................................................605
Description ...............................................................562 Diagnostic Procedure ..............................................606
Testing Condition .....................................................562 DTC P0335 CRANKSHAFT POSITION SENSOR
Inspection Procedure...............................................562 (CKPS) (POS) ..............................................................609
Diagnostic Procedure ..............................................563 Component Description ...........................................609

EC-6
 CONTENTS (Cont’d)
CONSULT-II Reference Value in Data Monitor ABSOLUTE PRESSURE SENSOR ............................659 GI
Mode ........................................................................609 Component Description ...........................................659
On Board Diagnosis Logic.......................................609 Wiring Diagram ........................................................660
Possible Cause........................................................609 Diagnostic Procedure ..............................................661 MA
DTC Confirmation Procedure ..................................610 INTAKE AIR TEMPERATURE SENSOR ....................665
Wiring Diagram ........................................................611 Component Description ...........................................665
Diagnostic Procedure ..............................................612 Wiring Diagram ........................................................666
EM
DTC P0340 CAMSHAFT POSITION SENSOR Diagnostic Procedure ..............................................667
(CMPS) (PHASE).........................................................617 HEATED OXYGEN SENSOR 1 (FRONT)...................670 LC
Component Description ...........................................617 Component Description ...........................................670
On Board Diagnosis Logic.......................................617 CONSULT-II Reference Value in Data Monitor
Possible Cause........................................................617 Mode ........................................................................670
DTC Confirmation Procedure ..................................617 Wiring Diagram ........................................................671
Wiring Diagram ........................................................619 Diagnostic Procedure ..............................................673
Diagnostic Procedure ..............................................620 HEATED OXYGEN SENSOR 1 HEATER (FRONT)...680 FE
DTC P0605 ECM .........................................................623 Description ...............................................................680
Component Description ...........................................623 CONSULT-II Reference Value in Data Monitor CL
On Board Diagnosis Logic.......................................623 Mode ........................................................................680
Possible Cause........................................................623 Wiring Diagram ........................................................681
DTC Confirmation Procedure ..................................623 Diagnostic Procedure ..............................................683 MT
Diagnostic Procedure ..............................................624 HEATED OXYGEN SENSOR 2 (REAR).....................687
DTC P1217 ENGINE OVER TEMPERATURE Component Description ...........................................687
(OVERHEAT) ...............................................................626 CONSULT-II Reference Value in Data Monitor AT
System Description..................................................626 Mode ........................................................................687
CONSULT-II Reference Value in Data Monitor Wiring Diagram ........................................................688
AX
Mode ........................................................................627 Diagnostic Procedure ..............................................690
On Board Diagnosis Logic.......................................627 HEATED OXYGEN SENSOR 2 HEATER (REAR).....696
Possible Cause........................................................627 Description ...............................................................696 SU
Overall Function Check ...........................................628 CONSULT-II Reference Value in Data Monitor
Wiring Diagram ........................................................630 Mode ........................................................................696
Diagnostic Procedure ..............................................632 Wiring Diagram ........................................................697 BR
Main 12 Causes of Overheating..............................643 Diagnostic Procedure ..............................................699
DTC P1335 CRANKSHAFT POSITION SENSOR FUEL TANK TEMPERATURE SENSOR ....................703
(CKPS) (REF) ..............................................................644 Component Description ...........................................703
ST
Component Description ...........................................644 Wiring Diagram ........................................................704
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ..............................................705 RS
Mode ........................................................................644 EGR VOLUME CONTROL SYSTEM ..........................707
On Board Diagnosis Logic.......................................644 Description ...............................................................707
Possible Cause........................................................645 CONSULT-II Reference Value in Data Monitor BT
DTC Confirmation Procedure ..................................645 Mode ........................................................................708
Wiring Diagram ........................................................647 Wiring Diagram ........................................................709
Diagnostic Procedure ..............................................648 Diagnostic Procedure ..............................................710 HA
DTC P1336 CRANKSHAFT POSITION SENSOR EVAP CANISTER PURGE VOLUME CONTROL
(CKPS) (POS) (COG) ..................................................651 SOLENOID VALVE......................................................718
SC
Component Description ...........................................651 Description ...............................................................718
CONSULT-II Reference Value in Data Monitor CONSULT-II Reference Value in Data Monitor
Mode ........................................................................651 Mode ........................................................................718 EL
On Board Diagnosis Logic.......................................651 Wiring Diagram ........................................................719
Possible Cause........................................................651 Diagnostic Procedure ..............................................720
DTC Confirmation Procedure ..................................652 VEHICLE SPEED SENSOR (VSS)..............................724 IDX
Wiring Diagram ........................................................653 Component Description ...........................................724
Diagnostic Procedure ..............................................654 Wiring Diagram ........................................................725

EC-7
 CONTENTS (Cont’d)
Diagnostic Procedure ..............................................726 Wiring Diagram ........................................................790
IDLE AIR CONTROL VALVE (IACV) - AUXILIARY Diagnostic Procedure ..............................................791
AIR CONTROL (AAC) VALVE ....................................728 FUEL PUMP.................................................................793
Description ...............................................................728 System Description..................................................793
CONSULT-II Reference Value in Data Monitor Component Description ...........................................793
Mode ........................................................................729 CONSULT-II Reference Value in Data Monitor
Wiring Diagram ........................................................730 Mode ........................................................................793
Diagnostic Procedure ..............................................731 Wiring Diagram ........................................................794
CLOSED THROTTLE POSITION SWITCH ................736 Diagnostic Procedure ..............................................795
Component Description ...........................................736 ELECTRONIC CONTROLLED ENGINE MOUNT.......799
Wiring Diagram ........................................................737 System Description..................................................799
Diagnostic Procedure ..............................................738 CONSULT-II Reference Value in Data Monitor
A/T COMMUNICATION LINE......................................742 Mode ........................................................................799
System Description..................................................742 Wiring Diagram ........................................................800
Wiring Diagram ........................................................743 Diagnostic Procedure ..............................................801
Diagnostic Procedure ..............................................744 POWER STEERING OIL PRESSURE SWITCH.........803
SWIRL CONTROL VALVE CONTROL SOLENOID Component Description ...........................................803
VALVE..........................................................................746 CONSULT-II Reference Value in Data Monitor
Description ...............................................................746 Mode ........................................................................803
CONSULT-II Reference Value in Data Monitor Wiring Diagram ........................................................804
Mode ........................................................................747 Diagnostic Procedure ..............................................805
Wiring Diagram ........................................................748 REFRIGERANT PRESSURE SENSOR ......................808
Diagnostic Procedure ..............................................749 Description ...............................................................808
IGNITION SIGNAL.......................................................755 Wiring Diagram ........................................................809
Component Description ...........................................755 Diagnostic Procedure ..............................................810
Wiring Diagram ........................................................756 ELECTRICAL LOAD SIGNAL.....................................812
Diagnostic Procedure ..............................................759 Wiring Diagram ........................................................812
A/T DIAGNOSIS COMMUNICATION LINE ................766 Diagnostic Procedure ..............................................815
Component Description ...........................................766 MIL & DATA LINK CONNECTORS ............................819
Wiring Diagram ........................................................767 Wiring Diagram ........................................................819
Diagnostic Procedure ..............................................768 SERVICE DATA AND SPECIFICATIONS (SDS) .......820
PARK/NEUTRAL POSITION (PNP) SWITCH ............770 Fuel Pressure Regulator..........................................820
Component Description ...........................................770 Idle Speed and Ignition Timing................................820
CONSULT-II Reference Value in Data Monitor Mass Air Flow Sensor..............................................820
Mode ........................................................................770 Engine Coolant Temperature Sensor ......................820
Wiring Diagram ........................................................771 EGR Temperature Sensor .......................................820
Diagnostic Procedure ..............................................772 Heated Oxygen Sensor 1 Heater (Front) ................820
VARIABLE INDUCTION AIR CONTROL SYSTEM Fuel Pump ...............................................................820
(VIAS)...........................................................................777 IACV-AAC Valve ......................................................820
Description ...............................................................777 Injector .....................................................................821
Wiring Diagram ........................................................779 Resistor....................................................................821
Diagnostic Procedure ..............................................780 Throttle Position Sensor ..........................................821
INJECTOR ...................................................................783 Calculated Load Value.............................................821
Component Description ...........................................783 Intake Air Temperature Sensor................................821
CONSULT-II Reference Value in Data Monitor Heated Oxygen Sensor 2 Heater (Rear).................821
Mode ........................................................................783 Crankshaft Position Sensor (REF) ..........................821
Wiring Diagram ........................................................784 Fuel Tank Temperature Sensor ...............................821
Diagnostic Procedure ..............................................785 Camshaft Position Sensor (PHASE) .......................821
START SIGNAL...........................................................789
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................789

EC-8
 TROUBLE DIAGNOSIS — INDEX WITH EURO-OBD
Alphabetical & P No. Index for DTC

Alphabetical & P No. Index for DTC NFEC0665

Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Vehicle identification number
(chassis number)” on the identification plate. Refer to GI-40, “VEHICLE IDENTIFICATION NUMBER GI
ARRANGEMENT”.
ALPHABETICAL INDEX FOR DTC NFEC0665S05
MA
Items
DTC*1 Reference page
(CONSULT-II screen terms) EM
Unable to access ECM — EC-95

AIR TEMP SEN/CIRC P0110 EC-131 LC

A/T 1ST GR FNCTN P0731 AT-462

A/T 2ND GR FNCTN P0732 AT-468

A/T 3RD GR FNCTN P0733 AT-474

A/T 4TH GR FNCTN P0734 AT-480 FE

A/T DIAG COMM LINE P1605 EC-378

ATF TEMP SEN/CIRC P0710 AT-446 CL

CMP SEN/CIRCUIT P0340 EC-288

CLOSED TP SW/CIRC P0510 EC-318

MT
COOLANT T SEN/CIRC*3 P0115 EC-136
AT
CKP SENSOR (COG) P1336 EC-370

CKP SEN/CIRCUIT P0335 EC-280

AX
CKP SEN (REF)/CIRC P1335 EC-364

CYL 1 MISFIRE P0301 EC-267

SU
CYL 2 MISFIRE P0302 EC-267

CYL 3 MISFIRE P0303 EC-267

BR
CYL 4 MISFIRE P0304 EC-267

CYL 5 MISFIRE P0305 EC-267 ST

CYL 6 MISFIRE P0306 EC-267

ECM P0605 EC-326 RS

ENGINE SPEED SIG P0725 AT-457

ENG OVER TEMP P1217 EC-335 BT

FUEL SYS-LEAN/BK1 P0171 EC-247

FUEL SYS-LEAN/BK2 P0174 EC-247 HA

FUEL SYS-RICH/BK1 P0172 EC-255

FUEL SYS-RICH/BK2 P0175 EC-255 SC

FUEL TEMP SEN/CIRC P0180 EC-262

HO2S1 (B1) P0130 EC-148

EL
HO2S1 (B1) P0131 EC-157

HO2S1 (B1) P0132 EC-164

IDX
HO2S1 (B1) P0133 EC-171

HO2S1 (B1) P0134 EC-183

EC-9
 TROUBLE DIAGNOSIS — INDEX WITH EURO-OBD
Alphabetical & P No. Index for DTC (Cont’d)

Items
DTC*1 Reference page
(CONSULT-II screen terms)

HO2S1 (B2) P0150 EC-148

HO2S1 (B2) P0151 EC-157

HO2S1 (B2) P0152 EC-164

HO2S1 (B2) P0153 EC-171

HO2S1 (B2) P0154 EC-183

HO2S1 HTR (B1) P0135 EC-191

HO2S1 HTR (B2) P0155 EC-191

HO2S2 (B1) P0137 EC-198

HO2S2 (B1) P0138 EC-209

HO2S2 (B1) P0139 EC-220

HO2S2 (B1) P0140 EC-231

HO2S2 (B2) P0157 EC-198

HO2S2 (B2) P0158 EC-209

HO2S2 (B2) P0159 EC-220

HO2S2 (B2) P0160 EC-231

HO2S2 HTR (B1) P0141 EC-240

HO2S2 HTR (B2) P0161 EC-240

IACV/AAC VLV/CIRC P0505 EC-309

KNOCK SEN/CIRC-B1 P0325 EC-275

L/PRES SOL/CIRC P0745 AT-494

MAF SEN/CIRCUIT*3 P0100 EC-125

MULTI CYL MISFIRE P0300 EC-267

NATS MALFUNCTION P1610 - P1615*2 EL-380

NO DTC IS DETECTED.
FURTHER TESTING P0000 —
MAY BE REQUIRED.

O/R CLTCH SOL/CIRC P1760 AT-519

P-N POS SW/CIRCUIT P1706 EC-381

PNP SW/CIRC P0705 AT-440

PURG VOLUME CONT/V P0443 EC-299

SFT SOL A/CIRC*3 P0750 AT-500

SFT SOL B/CIRC*3 P0755 AT-505

SWIRL CONT SOL/V P1131 EC-328

TCC SOLENOID/CIRC P0740 AT-489

TP SEN/CIRC A/T*3 P1705 AT-510

TRTL POS SEN/CIRC*3 P0120 EC-141

TW CATALYST SYS-B1 P0420 EC-294

TW CATALYST SYS-B2 P0430 EC-294

EC-10
 TROUBLE DIAGNOSIS — INDEX WITH EURO-OBD
Alphabetical & P No. Index for DTC (Cont’d)

Items
DTC*1 Reference page
(CONSULT-II screen terms)
GI
VEH SPEED SEN/CIRC*4 P0500 EC-305

VEH SPD SEN/CIR A/T*4 P0720 AT-452

MA
*1: 1st trip DTC No. is the same as DTC No. And these numbers are displayed with CONSULT-II or GST only.
*2: This DTC is displayed with CONSULT-II only.
*3: When the fail-safe operation occurs, the MIL illuminates. EM
*4: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at
the same time.
NOTE: LC
Regarding A33 models, “-B1” and “BK1” indicate bank 1 and “-B2” and “BK2” indicate bank 2.

P NO. INDEX FOR DTC NFEC0665S06

Items
DTC*1 Reference page
(CONSULT-II screen terms)
FE
— Unable to access ECM EC-95

NO DTC IS DETECTED.
P0000 FURTHER TESTING —
CL
MAY BE REQUIRED.

P0100 MAF SEN/CIRCUIT*3 EC-125 MT

P0110 AIR TEMP SEN/CIRC EC-131

P0115 COOLANT T SEN/CIRC*3 EC-136 AT

P0120 THRTL POS SEN/CIRC*3 EC-141

P0130 HO2S1 (B1) EC-148 AX

P0131 HO2S1 (B1) EC-157

P0132 HO2S1 (B1) EC-164 SU

P0133 HO2S1 (B1) EC-171

P0134 HO2S1 (B1) EC-183

BR
P0135 HO2S1 HTR (B1) EC-191
ST
P0137 HO2S2 (B1) EC-198

P0138 HO2S2 (B1) EC-209

RS
P0139 HO2S2 (B1) EC-220

P0140 HO2S2 (B1) EC-231

BT
P0141 HO2S2 HTR (B1) EC-240

P0150 HO2S1 (B2) EC-148

HA
P0151 HO2S1 (B2) EC-157

P0152 HO2S1 (B2) EC-164 SC

P0153 HO2S1 (B2) EC-171

P0154 HO2S1 (B2) EC-183 EL

P0155 HO2S1 HTR (B2) EC-191

P0157 HO2S2 (B2) EC-198 IDX

P0158 HO2S2 (B2) EC-209

P0159 HO2S2 (B2) EC-220

P0160 HO2S2 (B2) EC-231

EC-11
 TROUBLE DIAGNOSIS — INDEX WITH EURO-OBD
Alphabetical & P No. Index for DTC (Cont’d)

Items
DTC*1 Reference page
(CONSULT-II screen terms)

P0161 HO2S2 HTR (B2) EC-240

P0171 FUEL SYS-LEAN/BK1 EC-247

P0172 FUEL SYS-RICH/BK1 EC-255

P0174 FUEL SYS-LEAN/BK2 EC-247

P0175 FUEL SYS-RICH/BK2 EC-255

P0180 FUEL TEMP SEN/CIRC EC-262

P0300 MULTI CYL MISFIRE EC-267

P0301 CYL 1 MISFIRE EC-267

P0302 CYL 2 MISFIRE EC-267

P0303 CYL 3 MISFIRE EC-267

P0304 CYL 4 MISFIRE EC-267

P0305 CYL 5 MISFIRE EC-267

P0306 CYL 6 MISFIRE EC-267

P0325 KNOCK SEN/CIRC-B1 EC-275

P0335 CKP SEN/CIRCUIT EC-280

P0340 CMP SEN/CIRCUIT EC-288

P0420 TW CATALYST SYS-B1 EC-294

P0430 TW CATALYST SYS-B2 EC-294

P0443 PURG VOLUME CONT/V EC-299

P0500 VEH SPEED SEN/CIRC*4 EC-305

P0505 IACV/AAC VLV/CIRC EC-309

P0510 CLOSED TP SW/CIRC EC-318

P0605 ECM EC-326

P0705 PNP SW/CIRC AT-440

P0710 ATF TEMP SEN/CIRC AT-446

P0720 VEH SPD SEN/CIR A/T*4 AT-452

P0725 ENGINE SPEED SIG AT-457

P0731 A/T 1ST GR FNCTN AT-462

P0732 A/T 2ND GR FNCTN AT-468

P0733 A/T 3RD GR FNCTN AT-474

P0734 A/T 4TH GR FNCTN AT-480

P0740 TCC SOLENOID/CIRC AT-489

P0745 L/PRESS SOL/CIRC AT-494

P0750 SFT SOL A/CIRC*3 AT-500

P0755 SFT SOL B/CIRC*3 AT-505

P1131 SWIRL CONT SOL/V EC-328

P1217 ENG OVER TEMP EC-335

EC-12
 TROUBLE DIAGNOSIS — INDEX WITH EURO-OBD
Alphabetical & P No. Index for DTC (Cont’d)

Items
DTC*1 Reference page
(CONSULT-II screen terms)
GI
P1335 CKP SEN (REF)/CIRC EC-364

P1336 CKP SENSOR (COG) EC-370

MA
P1605 A/T DIAG COMM LINE EC-378

P1610 - P1615*2 NATS MALFUNCTION EL-380

EM
P1705 TP SEN/CIRC A/T*3 AT-510

P1706 P-N POS SW/CIRCUIT EC-381 LC

P1760 O/R CLTCH SOL/CIRC AT-519

*1: 1st trip DTC No. is the same as DTC No. And these numbers are displayed with CONSULT-II or GST only.
*2: This DTC is displayed with CONSULT-II only.
*3: When the fail-safe operation occurs, the MIL illuminates.
*4: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at FE
the same time.
NOTE:
Regarding A33 models, “-B1” and “BK1” indicate bank 1 and “-B2” and “BK2” indicate bank 2. CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-13
 PRECAUTIONS WITH EURO-OBD
Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”

Supplemental Restraint System (SRS) “AIR

BAG” and “SEAT BELT PRE-TENSIONER” NFEC0666
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL A33 is as follows (The compo-
sition varies according to the destination and optional equipment.):
I For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring
harness, warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
I To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
I Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
I Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified with yellow harness connector (and with
yellow harness protector or yellow insulation tape before the harness connectors).
Precautions for On Board Diagnostic (OBD)
System of Engine NFEC0667
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
I Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MIL to light up.
I Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
I Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to EL section,
“Description”, “HARNESS CONNECTOR”.
I Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MIL to light up due to the short circuit.
I Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM before
returning the vehicle to the customer.

EC-14
PRECAUTIONS WITH EURO-OBD
Engine Fuel & Emission Control System

Engine Fuel & Emission Control System NFEC0668

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SEF242XC

EC-15
 PRECAUTIONS WITH EURO-OBD
Precautions

Precautions NFEC0669
I Before connecting or disconnecting the ECM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the
ECM because battery voltage is applied to ECM even if
ignition switch is turned off.

SEF289H

I When connecting ECM harness connector, fasten it

securely with a lever as far as it will go as shown at left.

SEF908W

I When connecting or disconnecting pin connectors into or

from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.

SEF291H

I Before replacing ECM, perform “ECM Terminals and Ref-

erence Value” inspection and make sure ECM functions
properly. Refer to EC-105.

MEF040D

I After performing each TROUBLE DIAGNOSIS, perform

“DTC Confirmation Procedure” or “Overall Function
Check”.
The DTC should not be displayed in the “DTC Confirma-
tion Procedure” if the repair is completed. The “Overall
Function Check” should be a good result if the repair is
completed.

SAT652J

EC-16
 PRECAUTIONS WITH EURO-OBD
Precautions (Cont’d)
I When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and GI
damage the ECM power transistor.
I Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the MA
ECM’s transistor. Use a ground other than ECM terminals,
such as the ground.
EM

LC

FE

CL

SEF348N
MT
I Regarding model A33, “Bank 1 (B1)” indicates cylinders
number 1, 3, 5 and “Bank 2 (B2)” indicates cylinders num- AT
ber 2, 4, 6 as shown in the figure.

AX

SU

BR
SEF099WA

Wiring Diagrams and Trouble Diagnosis NFEC0670 ST

When you read Wiring diagrams, refer to the following:
I GI-11, “HOW TO READ WIRING DIAGRAMS”
I EL-9, “POWER SUPPLY ROUTING” for power distribution circuit RS
When you perform trouble diagnosis, refer to the following:
I GI-32, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES” BT
I GI-21, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”

HA

SC

EL

IDX

EC-17
 PREPARATION WITH EURO-OBD
Special Service Tools

Special Service Tools NFEC0671

Tool number
Description
Tool name

KV10117100 Loosening or tightening front and heated oxygen

Heated oxygen sensor sensor 2 (rear)s with 22 mm (0.87 in) hexagon nut
1 (front) wrench
Heated oxygen sensor
2 (rear) wrench

NT379

KV10117600 Checking fuel pressure with pressure gauge

Fuel pressure check
adapter

NT777

Commercial Service Tools NFEC0672

Tool name Description

Fuel filler cap adapter Checking fuel tank vacuum relief valve opening
pressure

NT653

Socket wrench Removing and installing engine coolant tempera-

ture sensor

NT705

Oxygen sensor thread Reconditioning the exhaust system threads before

cleaner installing a new oxygen sensor. Use with anti-seize
lubricant shown below.
a: 18 mm dia. with pitch 1.5 mm for Zirconia
Oxygen Sensor
b: 12 mm dia. with pitch 1.25 mm for Titania
Oxygen Sensor

NT778

EC-18
 PREPARATION WITH EURO-OBD
Commercial Service Tools (Cont’d)

Tool name Description

Anti-seize lubricant Lubricating oxygen sensor thread cleaning tool GI

(PermatexTM 133AR or when reconditioning exhaust system threads.
equivalent meeting MIL
specification MIL-A-907) MA

EM
NT779
LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-19
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITH EURO-OBD
Engine Control Component Parts Location

Engine Control Component Parts Location NFEC0673

SEC121C

EC-20
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITH EURO-OBD
Engine Control Component Parts Location (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX
SEC644C

EC-21
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITH EURO-OBD
Engine Control Component Parts Location (Cont’d)

SEC122C

EC-22
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITH EURO-OBD
Engine Control Component Parts Location (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX
SEF982X

EC-23
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITH EURO-OBD
Circuit Diagram

Circuit Diagram NFEC0674

MEC851D

EC-24
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITH EURO-OBD
System Diagram

System Diagram NFEC0675

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SEC647C

EC-25
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITH EURO-OBD
Vacuum Hose Drawing

Vacuum Hose Drawing NFEC0676

SEC124C

Refer to “System Diagram”, EC-25 for Vacuum Control System.

EC-26
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITH EURO-OBD
System Chart

System Chart NFEC0677

Input (Sensor) ECM Function Output (Actuator) GI

I Camshaft position sensor (PHASE) Fuel injection & mixture ratio control Injectors
I Crankshaft position sensor (REF)
I Mass air flow sensor Electronic ignition system Power transistor MA
I Engine coolant temperature sensor Idle air control system IACV-AAC valve
I Heated oxygen sensor 1 (front)
I Ignition switch Fuel pump control Fuel pump relay EM
I Throttle position sensor
I Closed throttle position switch *3 On board diagnostic system MIL (On the instrument panel)
I Park/neutral position (PNP) switch
Swirl control valve control solenoid LC
I Air conditioner switch Swirl control valve control
valve
I Knock sensor
I Intake air temperature sensor Power valve control VIAS control solenoid valve
I Absolute pressure sensor
I Battery voltage Heated oxygen sensor 1 heater (front) control
Heated oxygen sensor 1 heater
I Power steering oil pressure switch (front)
I Vehicle speed sensor
FE
Heated oxygen sensor 2 heater
I Fuel tank temperature sensor *1 Heated oxygen sensor 2 heater (rear) control
(rear)
I Crankshaft position sensor (POS)
I Heated oxygen sensor 2 (rear) *2 EVAP canister purge volume con-
CL
I TCM (Transmission control module) EVAP canister purge flow control
trol solenoid valve
I Refrigerant pressure sensor
I Electrical load Air conditioning cut control Air conditioner relay MT
Cooling fan control Cooling fan relays

*1: These sensors are not used to control the engine system. AT
*2: This sensor is not used to control the engine system under normal conditions.
*3: This switch will operate in place of the throttle position sensor if the sensor malfunctions.
AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-27
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITH EURO-OBD
Multiport Fuel Injection (MFI) System

Multiport Fuel Injection (MFI) System

DESCRIPTION NFEC0678
Input/Output Signal Chart NFEC0678S01

Sensor Input Signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

Camshaft position sensor (PHASE) Piston position

Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperature

Heated oxygen sensor 1 (front) Density of oxygen in exhaust gas

Throttle position
Throttle position sensor
Throttle valve idle position
Fuel injection &
Park/neutral position (PNP) switch Gear position mixture ratio Injectors
Vehicle speed sensor Vehicle speed control

Ignition switch Start signal

Air conditioner switch Air conditioner operation

Knock sensor Engine knocking condition

Battery Battery voltage

Absolute pressure sensor Ambient air barometric pressure

Power steering oil pressure switch Power steering operation

Heated oxygen sensor 2 (rear)*1 Density of oxygen in exhaust gas

*1: Under normal conditions, this sensor is not for engine control operation.

Basic Multiport Fuel Injection System NFEC0678S02

The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air
flow sensor.
Various Fuel Injection Increase/Decrease Compensation NFEC0678S03
In addition, the amount of fuel injected is compensated to improve engine performance under various oper-
ating conditions as listed below.
<Fuel increase>
I During warm-up
I When starting the engine
I During acceleration
I Hot-engine operation
I When selector lever is changed from “N” to “D”
I High-load, high-speed operation
<Fuel decrease>
I During deceleration
I During high engine speed operation

EC-28
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITH EURO-OBD
Multiport Fuel Injection (MFI) System (Cont’d)
Mixture Ratio Feedback Control (Closed loop control) NFEC0678S04

GI

MA

EM

LC
SEF932VA

The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission con-
trol. The three way catalyst (Mainfold) can then better reduce CO, HC and NOx emissions. This system uses
a heated oxygen sensor 1 (front) in the exhaust manifold to monitor if the engine operation is rich or lean. The
ECM adjusts the injection pulse width according to the sensor voltage signal. For more information about the FE
heated oxygen sensor 1 (front), refer to EC-148. This maintains the mixture ratio within the range of stoichio-
metric (ideal air-fuel mixture).
This stage is referred to as the closed loop control condition. CL
Heated oxygen sensor 2 (rear) is located downstream of the three way catalyst (Manifold). Even if the switch-
ing characteristics of the heated oxygen sensor 1 (front) shift, the air-fuel ratio is controlled to stoichiometric
by the signal from the heated oxygen sensor 2 (rear). MT
Open Loop Control NFEC0678S05
The open loop system condition refers to when the ECM detects any of the following conditions. Feedback AT
control stops in order to maintain stabilized fuel combustion.
I Deceleration and acceleration
I High-load, high-speed operation AX
I Malfunction of heated oxygen sensor 1 (front) or its circuit
I Insufficient activation of heated oxygen sensor 1 (front) at low engine coolant temperature SU
I High engine coolant temperature
I During warm-up
I After shifting from “N” to “D” BR
I When starting the engine
Mixture Ratio Self-learning Control NFEC0678S06
ST
The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the heated oxy-
gen sensor 1 (front). This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio
as close to the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily con- RS
trolled as originally designed. Both manufacturing differences (i.e., mass air flow sensor hot film) and charac-
teristic changes during operation (i.e., injector clogging) directly affect mixture ratio.
Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This BT
is then computed in terms of “injection pulse duration” to automatically compensate for the difference between
the two ratios.
“Fuel trim” refers to the feedback compensation value compared against the basic injection duration. Fuel trim
HA
includes short term fuel trim and long term fuel trim.
“Short term fuel trim” is the short-term fuel compensation used to maintain the mixture ratio at its theoretical SC
value. The signal from the heated oxygen sensor 1 (front) indicates whether the mixture ratio is RICH or LEAN
compared to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is
rich, and an increase in fuel volume if it is lean. EL
“Long term fuel trim” is overall fuel compensation carried out long-term to compensate for continual deviation
of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences,
wear over time and changes in the usage environment. IDX

EC-29
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITH EURO-OBD
Multiport Fuel Injection (MFI) System (Cont’d)
Fuel Injection Timing NFEC0678S07

SEF179U

Two types of systems are used.

Sequential Multiport Fuel Injection System NFEC0678S0701
Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.
Simultaneous Multiport Fuel Injection System NFEC0678S0702
Fuel is injected simultaneously into all six cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The six injectors will then receive the signals two times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
Fuel Shut-off NFEC0678S08
Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.
Electronic Ignition (EI) System
DESCRIPTION NFEC0679
Input/Output Signal Chart NFEC0679S01

Sensor Input Signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

Camshaft position sensor (PHASE) Piston position

Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperature

Throttle position Ignition timing

Throttle position sensor Power transistor
Throttle valve idle position control

Vehicle speed sensor Vehicle speed

Ignition switch Start signal

Knock sensor Engine knocking

Park/neutral position (PNP) switch Gear position

Battery Battery voltage

EC-30
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITH EURO-OBD
Electronic Ignition (EI) System (Cont’d)
System Description NFEC0679S02

GI

MA

EM

LC
SEF742M

The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of
the engine. The ignition timing data is stored in the ECM. This data forms the map shown.
The ECM receives information such as the injection pulse width and camshaft position sensor signal. Com- FE
puting this information, ignition signals are transmitted to the power transistor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
A °BTDC CL
During the following conditions, the ignition timing is revised by the ECM according to the other data stored
in the ECM.
I At starting MT
I During warm-up
I At idle
I At low battery voltage AT
I During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed AX
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition. SU
Air Conditioning Cut Control
DESCRIPTION NFEC0680
BR
Input/Output Signal Chart NFEC0680S01

Sensor Input Signal to ECM ECM function Actuator ST

Air conditioner switch Air conditioner “ON” signal

Throttle position sensor Throttle valve opening angle

RS
Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

BT
Air conditioner
Engine coolant temperature sensor Engine coolant temperature Air conditioner relay
cut control
HA
Ignition switch Start signal

Vehicle speed sensor Vehicle speed

SC
Refrigerant pressure sensor Refrigerant pressure

Power steering oil pressure switch Power steering operation

EL
System Description NFEC0680S02
This system improves engine operation when the air conditioner is used. IDX
Under the following conditions, the air conditioner is turned off.
I When the accelerator pedal is fully depressed.
I When cranking the engine.
I At high engine speeds.

EC-31
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITH EURO-OBD
Air Conditioning Cut Control (Cont’d)
I When the engine coolant temperature becomes excessively high.
I When operating power steering during low engine speed or low vehicle speed.
I When engine speed is excessively low.
I When refrigerant pressure is excessively low or high.
Fuel Cut Control (at no load & high engine
speed)
DESCRIPTION NFEC0681
Input/Output Signal Chart NFEC0681S01

Sensor Input Signal to ECM ECM function Actuator

Vehicle speed sensor Vehicle speed

Park/neutral position (PNP) switch Neutral position

Throttle position sensor Throttle position

Fuel cut control Injectors
Engine coolant temperature sensor Engine coolant temperature

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

If the engine speed is above 1,800 rpm with no load (for example, in neutral and engine speed over 1,800
rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed.
Fuel cut will operate until the engine speed reaches 1,500 rpm, then fuel cut is cancelled.
NOTE:
This function is different from deceleration control listed under “Multiport Fuel Injection (MFI) System”, EC-28.
Evaporative Emission System
DESCRIPTION NFEC0682

SEF988X

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel
system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.
The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the
vapor is stored there when the engine is not operating or when refueling to the fuel tank.
The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the
engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine

EC-32
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITH EURO-OBD
Evaporative Emission System (Cont’d)
operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is propor-
tionally regulated as the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and GI
idling.

MA

EM

LC
INSPECTION NFEC0683
EVAP Canister NFEC0683S01
Check EVAP canister as follows:
1. Block port B. Blow air through port A orally. Check that air flows
freely through port C with check valve resistance. FE
2. Block port A. Blow air through port B orally. Check that air flows
freely through port C.
CL

SEF917W
MT
Fuel Tank Vacuum Relief Valve (Built into fuel fillerNFEC0683S02
cap)
1. Wipe clean valve housing. AT
2. Check valve opening pressure and vacuum.
Pressure:
AX
15.3 - 20.0 kPa (0.1530 - 0.2001 bar, 0.156 - 0.204
kg/cm2, 2.22 - 2.90 psi)
Vacuum: SU
−6.0 to −3.4 kPa (–0.0598 to –0.0343 bar, −0.061 to
−0.035 kg/cm2, −0.87 to −0.50 psi)
3. If out of specification, replace fuel filler cap as an assembly. BR
SEF989X
CAUTION:
Use only a genuine fuel filler cap as a replacement. ST

RS

BT

HA
SEF943S

Evaporative Emission (EVAP) Canister Purge Volume SC

Control Solenoid Valve NFEC0683S03
Refer to EC-299 and EC-392.
EL
Fuel Tank Temperature Sensor NFEC0683S04
Refer to EC-262.
IDX
Checking EVAP Vapor Lines NFEC0683S05
1. Visually inspect vapor lines for leaks, cracks, damage, loose
connections, chafing and deterioration.
2. Inspect vacuum relief valve of fuel tank filler cap for clogging,
sticking, etc. Refer to next page.
EC-33
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITH EURO-OBD
Evaporative Emission System (Cont’d)
EVAPORATIVE EMISSION LINE DRAWING NFEC0684

SEC125C

EC-34
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITH EURO-OBD
Positive Crankcase Ventilation

Positive Crankcase Ventilation

DESCRIPTION
This system returns blow-by gas to the intake manifold.
NFEC0685
GI
The positive crankcase ventilation (PCV) valve is provided to con-
duct crankcase blow-by gas to the intake manifold. MA
During partial throttle operation of the engine, the intake manifold
sucks the blow-by gas through the PCV valve.
Normally, the capacity of the valve is sufficient to handle any EM
blow-by and a small amount of ventilating air.
The ventilating air is then drawn from the air inlet tubes into the
SEF372Q crankcase. In this process the air passes through the hose con- LC
necting air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to
draw the blow-by flow through the valve. The flow goes through the
hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go FE
through the hose connection to the air inlet tubes under all
conditions.
CL

SEF559A
MT
INSPECTION NFEC0686
PCV (Positive Crankcase Ventilation) Valve NFEC0686S01
AT
With engine running at idle, remove PCV valve ventilation hose
from PCV valve; if the valve is working properly, a hissing noise will
be heard as air passes through it and a strong vacuum should be AX
felt immediately when a finger is placed over valve inlet.
SU

BR
SEC137A

PCV Valve Ventilation Hose

1. Check hoses and hose connections for leaks.
NFEC0686S02 ST
2. Disconnect all hoses and clean with compressed air. If any
hose cannot be freed of obstructions, replace. RS

BT

HA
ET277

SC

EL

IDX

EC-35
 BASIC SERVICE PROCEDURE WITH EURO-OBD
Fuel Pressure Release

Fuel Pressure Release NFEC0687

Before disconnecting fuel line, release fuel pressure from fuel
line to eliminate danger.
WITH CONSULT-II NFEC0687S01
1. Turn ignition switch “ON”.
2. Perform “FUEL PRESSURE RELEASE” in “WORK SUP-
PORT” mode with CONSULT-II.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel
SEF036YA pressure.
5. Turn ignition switch “OFF”.

PEF823K

WITHOUT CONSULT-II NFEC0687S02

1. Remove fuel pump fuse located in fuse box.
2. Start engine.
3. After engine stalls, crank it two or three times to release all fuel
pressure.
4. Turn ignition switch “OFF”.
5. Reinstall fuel pump fuse after servicing fuel system.

SEF037YA

Fuel Pressure Check NFEC0688

I When reconnecting fuel line, always use new clamps.
I Make sure that clamp screw does not contact adjacent
parts.
I Use a torque driver to tighten clamps.
I Use Pressure Gauge to check fuel pressure.
I Do not perform fuel pressure check with system operat-
ing. Fuel pressure gauge may indicate false readings.
1. Release fuel pressure to zero.
SEF030Y
2. Disconnect fuel tube joint between fuel pressure regulator and
injector tube and set fuel pressure check adapter (J44321).

EC-36
 BASIC SERVICE PROCEDURE WITH EURO-OBD
Fuel Pressure Check (Cont’d)
3. Install pressure gauge to the fuel pressure check adapter as
shown in the figure.
4. Start engine and check for fuel leakage. GI
5. Read the indication of fuel pressure gauge.
At idling:
With vacuum hose connected
MA
Approximately 235 kPa (2.35 bar, 2.4 kg/cm2, 34
psi) EM
With vacuum hose disconnected
Approximately 294 kPa (2.94 bar, 3.0 kg/cm2, 43
SEF031Y
psi) LC
If results are unsatisfactory, perform Fuel Pressure Regulator
Check.

FE

CL

MT
Fuel Pressure Regulator Check NFEC0689
1. Stop engine and disconnect fuel pressure regulator vacuum AT
hose from vacuum gallery.
2. Plug vacuum gallery with a blind cap.
AX
3. Connect variable vacuum source to fuel pressure regulator.

SU

BR
SEC015C

4. Start engine and read indication of fuel pressure gauge as

vacuum is changed. ST
Fuel pressure should decrease as vacuum increases. If results
are unsatisfactory, replace fuel pressure regulator. RS

BT

HA
SEF718BA

SC

EL

IDX

EC-37
 BASIC SERVICE PROCEDURE WITH EURO-OBD
Injector

Injector
REMOVAL AND INSTALLATION NFEC0690
1. Release fuel pressure to zero.
2. Remove intake manifold collector. Refer to EM-20, “TIMING
CHAIN”.
3. Remove fuel tube assemblies in numerical sequence as
shown in the figure at left.
4. Expand and remove clips securing fuel injectors.
5. Extract fuel injectors straight from fuel tubes.
SEF702X I Be careful not to damage injector nozzles during removal.
I Do not bump or drop fuel injectors.
I Do not disassemble or adjust fuel injectors.
6. Carefully install O-rings, including the one used with the pres-
sure regulator.
I Lubricate O-rings with a smear of engine oil.
I Be careful not to damage O-rings with service tools, fin-
ger nails or clips. Do not expand or twist O-rings. If
stretched, do not insert them into fuel tubes immediately
after stretching.
I Discard old clips; replace with new ones.
SEF703X
7. Position clips in grooves on fuel injectors.
I Make sure that protrusions of fuel injectors are aligned
with cutouts of clips after installation.

SEF704XA

8. Align protrusions of fuel tubes with those of fuel injectors.

Insert fuel injectors straight into fuel tubes.
9. After properly inserting fuel injectors, check to make sure that
fuel tube protrusions are engaged with those of fuel injectors,
and that flanges of fuel tubes are engaged with clips.
EC-38
BASIC SERVICE PROCEDURE WITH EURO-OBD
Injector (Cont’d)
10. Tighten fuel tube assembly mounting nuts in numerical
sequence (indicated in the figure at left) and in two stages.
: Tightening torque N·m (kg-m, ft-lb) GI
1st stage:
9.3 - 10.8 (1.0 - 1.1, 6.9 - 7.9)
2nd stage:
MA
20.6 - 26.5 (2.1 - 2.7, 16 - 19)
11. Install all parts removed in reverse order of removal. EM
CAUTION:
After properly connecting fuel tube assembly to injector and
SEF705X
fuel hose, check connection for fuel leakage. LC
How to Check Idle Speed and Ignition Timing NFEC0691
IDLE SPEED NFEC0691S01
I Using CONSULT-II
Check idle speed in “DATA MONITOR” mode with CONSULT-II.
FE

CL

SEF058Y
MT
IGNITION TIMING NFEC0691S02
Any of following two methods may be used. AT
I Method A
a) Attach timing light to loop wire as shown.
AX
b) Check ignition timing.

SU

BR
SEF260P

I Method B
a) Remove No. 1 ignition coil.
ST

RS

BT

HA
SEF247Q

SC

EL

IDX

EC-39
 BASIC SERVICE PROCEDURE WITH EURO-OBD
How to Check Idle Speed and Ignition Timing (Cont’d)
b) Connect No. 1 ignition coil and No. 1 spark plug with suitable
high-tension wire as shown, and attach timing light clamp to
this wire.
c) Check ignition timing.

SEF248Q

SEF257P

SEF311Q

EC-40
BASIC SERVICE PROCEDURE WITH EURO-OBD
Idle Air Volume Learning

Idle Air Volume Learning NFEC0692

DESCRIPTION
“Idle Air Volume Learning” is an operation to learn the idle air vol-
NFEC0692S01
GI
ume that keeps each engine within the specific range. It must be
performed under any of the following conditions: MA
I Each time IACV-AAC valve, throttle body or ECM is replaced.
I Idle speed or ignition timing is out of specification.
EM
PRE-CONDITIONING NFEC0692S02
Before performing “Idle Air Volume Learning”, make sure that all of
SEF217Z the following conditions are satisfied. LC
Learning will be cancelled if any of the following conditions are
missed for even a moment.
I Battery voltage: More than 12.9V (At idle)
I Engine coolant temperature: 70 - 99°C (158 - 210°F)
I PNP switch: ON
FE
I Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, set lighting CL
switch to the 1st position to light only small lamps.
I Cooling fan motor: Not operating
SEF454Y I Steering wheel: Neutral (Straight-ahead position) MT
I Vehicle speed: Stopped
I Transmission: Warmed-up AT
For models with CONSULT-II, drive vehicle until “FLUID TEMP
SE” in “DATA MONITOR” mode of “A/T” system indicates less
than 0.9V. AX
For models without CONSULT-II, drive vehicle for 10 minutes.
OPERATION PROCEDURE NFEC0692S03 SU
With CONSULT-II NFEC0692S0301
1. Turn ignition switch “ON” and wait at least 1 second.
2. Turn ignition switch “OFF” and wait at least 10 seconds. BR
SEF455Y
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic “PRE-CONDITION- ST
ING” (previously mentioned) are in good order.
5. Turn ignition switch “OFF” and wait at least 10 seconds.
6. Start the engine and let it idle for at least 30 seconds. RS
7. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
8. Touch “START” and wait 20 seconds.
BT
9. Make sure that “CMPLT” is displayed on CONSULT-II screen.
If “INCMP” is displayed, “Idle Air Volume Learning” will not be
carried out successfully. In this case, find the cause of the HA
problem by referring to the NOTE below.
10. Rev up the engine two or three times. Make sure that idle
speed and ignition timing are within specifications. SC
ITEM SPECIFICATION

Idle speed VQ20DE 700±50 rpm (in “P” or “N” position) EL

VQ30DE 700±50 rpm (in “P” or “N” position)

Ignition timing VQ20DE 9°±5° BTDC (in “P” or ”N” position) IDX
VQ30DE 15°±5° BTDC (in “P” or “N” position)

EC-41
 BASIC SERVICE PROCEDURE WITH EURO-OBD
Idle Air Volume Learning (Cont’d)
Without CONSULT-II NFEC0692S0302
1. Turn ignition switch “ON” and wait at least 1 second.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic “PRE-CONDITION-
ING” (previously mentioned) are in good order.
5. Turn ignition switch “OFF” and wait at least 10 seconds.
6. Start the engine and let it idle for at least 30 seconds.
7. Disconnect throttle position sensor harness connector (brown),
then reconnect it within 5 seconds.
SEC001C
8. Wait 20 seconds.
9. Make sure that idle speed is within specifications. If not, the
result will be incomplete. In this case, find the cause of the
problem by referring to the NOTE below.
10. Rev up the engine two or three times. Make sure that idle
speed and ignition timing are within specifications.
ITEM SPECIFICATION

Idle speed VQ20DE 700±50 rpm (in “P” or “N” position)

VQ30DE 700±50 rpm (in “P” or “N” position)

Ignition timing VQ20DE 9°±5° BTDC (in “P” or ”N” position)

VQ30DE 15°±5° BTDC (in “P” or “N” position)

NOTE:
If idle air volume learning cannot be performed successfully,
proceed as follows:
1) Check that throttle valve is fully closed.
2) Check PCV valve operation.
3) Check that downstream of throttle valve is free from air
leakage.
4) Adjust closed throttle position switch and reset memory.
(Refer to Basic Inspection, EC-81.)
5) When the above four items check out OK, engine compo-
nent parts and their installation condition are question-
able. Check and eliminate the cause of the problem.
It is useful to perform “TROUBLE DIAGNOSIS — SPECIFI-
CATION VALUE”, EC-113.
6) If any of the following conditions occur after the engine
has started, eliminate the cause of the problem and per-
form “Idle air volume learning” all over again:
I Engine stalls.
I Erroneous idle.
I Blown fuses related to the IACV-AAC valve system.

EC-42
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Introduction

Introduction NFEC0693
The ECM has an on board diagnostic system which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including: GI
Diagnostic Trouble Code (DTC) Mode 3 of ISO 15031-5

Freeze Frame data Mode 2 of ISO 15031-5

MA
System Readiness Test (SRT) code Mode 1 of ISO 15031-5
EM
1st Trip Diagnostic Trouble Code (1st Trip DTC) Mode 7 of ISO 15031-5

1st Trip Freeze Frame data

LC
Test values and Test limits Mode 6 of ISO 15031-5

Calibration ID Mode 9 of ISO 15031-5

The above information can be checked by using CONSULT-II or GST only. Refer to the table below.
X: Applicable —: Not applicable
FE
Freeze Frame 1st trip Freeze
DTC 1st trip DTC SRT code Test value
data Frame data

CONSULT-II X X X X X —
CL
GST X X*1 X — X X

*1: 1st trip DTCs for self-diagnoses concerning SRT items cannot be shown on the GST display.
MT
The malfunction indicator lamp (MIL) on the instrument panel lights up when the same malfunction is detected
in two consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to EC-95.) AT
Two Trip Detection Logic NFEC0694
When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in AX
the ECM memory. The MIL will not light up at this stage <1st trip>.
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored
in the ECM memory, and the MIL lights up. The MIL lights up at the same time when the DTC is stored <2nd SU
trip>.
The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed during
vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MIL, and store BR
DTC and Freeze Frame data, even in the 1st trip, as shown below.
X: Applicable —: Not applicable

MIL DTC 1st trip DTC

ST
1st trip 2nd trip
Items 1st trip 2nd trip 1st trip 2nd trip RS
Lighting Lighting displaying displaying displaying displaying
Blinking Blinking
up up

Misfire (Possible three way BT

catalyst damage)
X — — — — — X —
— DTC: P0300 - P0306 is
being detected HA
Misfire (Possible three way
catalyst damage)
— DTC: P0300 - P0306 is
— — X — — X — — SC
being detected

Fail-safe items (Refer to

— X — — X*1 — X*1 — EL
EC-95.)

Except above — — — X — X X —
IDX
*1: Except “ECM”.

EC-43
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information

Emission-related Diagnostic Information NFEC0695

DTC AND 1ST TRIP DTC NFEC0695S11
The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previously, and the 1st trip DTC did not reoccur, the 1st trip
DTC will not be displayed. If a malfunction is detected during the 1st trip, the 1st trip DTC is stored in the ECM
memory. The MIL will not light up (two trip detection logic). If the same malfunction is not detected in the 2nd
trip (meeting the required driving pattern), the 1st trip DTC is cleared from the ECM memory. If the same mal-
function is detected in the 2nd trip, both the 1st trip DTC and DTC are stored in the ECM memory and the
MIL lights up. In other words, the DTC is stored in the ECM memory and the MIL lights up when the same
malfunction occurs in two consecutive trips. If a 1st trip DTC is stored and a non-diagnostic operation is per-
formed between the 1st and 2nd trips, only the 1st trip DTC will continue to be stored. For malfunctions that
blink or light up the MIL during the 1st trip, the DTC and 1st trip DTC are stored in the ECM memory.
Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in “How to Erase
Emission-related Diagnostic Information”. Refer to EC-55.
For malfunctions in which 1st trip DTCs are displayed, refer to EC-53. These items are required by legal
regulations to continuously monitor the system/component. In addition, the items monitored non-continuously
are also displayed on CONSULT-II.
1st trip DTC is specified in Mode 7 of ISO 15031-5. 1st trip DTC detection occurs without lighting up the MIL
and therefore does not warn the driver of a problem. However, 1st trip DTC detection will not prevent the
vehicle from being tested, for example during Inspection/Maintenance (I/M) tests.
When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame
data as specified in “Work Flow” procedure Step II, refer to page EC-79. Then perform “DTC Confirmation
Procedure” or “Overall Function Check” to try to duplicate the problem. If the malfunction is duplicated, the
item requires repair.
How to read DTC and 1st Trip DTC NFEC0695S1101
DTC and 1st trip DTC can be read by the following methods.
With CONSULT-II
With GST
CONSULT-II or GST (Generic Scan Tool) Examples: P0340, P1320, P0705, P0750, etc.
These DTCs are prescribed by ISO 15031-6.
(CONSULT-II also displays the malfunctioning component or system.)
I 1st trip DTC No. is the same as DTC No.
I Output of a DTC indicates a malfunction. However, GST does not indicate whether the malfunction
is still occurring or has occurred in the past and has returned to normal.
CONSULT-II can identify malfunction status as shown below. Therefore, using CONSULT-II (if avail-
able) is recommended.
A sample of CONSULT-II display for DTC is shown below. DTC or 1st trip DTC of a malfunction is displayed
in SELF-DIAGNOSTIC RESULTS mode of CONSULT-II. Time data indicates how many times the vehicle was
driven after the last detection of a DTC.
If the DTC is being detected currently, the time data will be “0”.
If a 1st trip DTC is stored in the ECM, the time data will be “[1t]”.

SEF992X

FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA NFEC0695S12
The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant
temperature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, absolute throttle position,
base fuel schedule and intake air temperature at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
EC-44
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For
details, see EC-66. GI
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no prior-
ity for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once MA
freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data. EM
Priority Items

Freeze frame data Misfire — DTC: P0300 - P0306 LC

1
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175

2 Except the above items (Includes A/T related items)

3 1st trip freeze frame data

For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was stored in the 2nd FE
trip. After that when the misfire (Priority: 1) is detected in another trip, the freeze frame data will be updated
from the EGR malfunction to the misfire. The 1st trip freeze frame data is updated each time a different mal-
function is detected. There is no priority for 1st trip freeze frame data. However, once freeze frame data is CL
stored in the ECM memory, 1st trip freeze data is no longer stored (because only one freeze frame data or
1st trip freeze frame data can be stored in the ECM). If freeze frame data is stored in the ECM memory and
freeze frame data with the same priority occurs later, the first (original) freeze frame data remains unchanged MT
in the ECM memory.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM
memory is erased. Procedures for clearing the ECM memory are described in “How to Erase Emission-related AT
Diagnostic Information”. Refer to EC-55.
SYSTEM READINESS TEST (SRT) CODE NFEC0695S13
AX
System Readiness Test (SRT) code is specified in Mode 1 of ISO 15051-5.
As part of an emissions test for Inspection & Maintenance (I/M), certain states require the status of SRT be
used to indicate whether the ECM has completed self-diagnosis of major emission systems and components. SU
Completion must be verified in order for the emissions inspection to proceed.
If a vehicle is rejected for a State emissions inspection due to one or more SRT items indicating “INCMP”,
use the information in this Service Manual to set the SRT to “CMPLT”. BR
In most cases the ECM will automatically complete its self-diagnosis cycle during normal usage, and the SRT
status will indicate “CMPLT” for each application system. Once set as “CMPLT”, the SRT status remains
“CMPLT” until the self-diagnosis memory is erased.
ST
Occasionally, certain portions of the self-diagnostic test may not be completed as a result of the customer’s
normal driving pattern; the SRT will indicate “INCMP” for these items.
RS
NOTE:
The SRT will also indicate “INCMP” if the self-diagnosis memory is erased for any reason or if the ECM
memory power supply is interrupted for several hours. BT
If, during the state emissions inspection, the SRT indicates “CMPLT” for all test items, the inspector will con-
tinue with the emissions test. However, if the SRT indicates “INCMP” for one or more of the SRT items the
vehicle is returned to the customer untested. HA
NOTE:
If MIL is “ON” during the state emissions inspection, the vehicle is also returned to the customer untested even
though the SRT indicates “CMPLT” for all test items. Therefore, it is important to check SRT (“CMPLT”) and
SC
DTC (No DTCs) before the inspection.
SRT Item EL
NFEC0695S1301
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
SRT item Perfor-
Corresponding
IDX
(CONSULT-II indica- mance Pri- Required self-diagnostic items to set the SRT to “CMPLT”
DTC No.
tion) ority*1

CATALYST 3 Three way catalyst function P0420, P0430

EC-45
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)

SRT item Perfor-

Corresponding
(CONSULT-II indica- mance Pri- Required self-diagnostic items to set the SRT to “CMPLT”
DTC No.
tion) ority*1

HO2S 3 Heated oxygen sensor 1 (front) (circuit) P0130, P0150

Heated oxygen sensor 1 (front) (lean shift monitoring) P0131, P0151

Heated oxygen sensor 1 (front) (rich shift monitoring) P0132, P0152

Heated oxygen sensor 1 (front) (response monitoring) P0133, P0153

Heated oxygen sensor 1 (front) (high voltage) P0134, P0154

Heated oxygen sensor 2 (rear) (min. voltage monitoring) P0137, P0157

Heated oxygen sensor 2 (rear) (max. voltage monitoring) P0138, P0158

Heated oxygen sensor 2 (rear) (response monitoring) P0139, P0159

Heated oxygen sensor 2 (rear) (high voltage) P0140, P0160

HO2S HTR 3 Heated oxygen sensor 1 heater (front) P0135, P0155

Heated oxygen sensor 2 heater (rear) P0141, P0161

*1: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority
for models with CONSULT-II.

SRT Set Timing NFEC0695S1302

SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is done
regardless of whether the result is OK or NG. The set timing is different between OK and NG results and is
shown in the table below.
Example
Self-diagnosis result Ignition cycle
Diagnosis
+ ON , OFF + ON , OFF + ON , OFF + ON ,

All OK Case 1 P0400 OK (1) — (1) OK (2) — (2)

P0402 OK (1) — (1) — (1) OK (2)

P1402 OK (1) OK (2) — (2) — (2)

SRT of EGR “CMPLT” “CMPLT” “CMPLT” “CMPLT”

Case 2 P0400 OK (1) — (1) — (1) — (1)

P0402 — (0) — (0) OK (1) — (1)

P1402 OK (1) OK (2) — (2) — (2)

SRT of EGR “INCMP” “INCMP” “CMPLT” “CMPLT”

NG exists Case 3 P0400 OK OK — —

P0402 — — — —

NG
P1402 NG — NG
(Consecutive NG)

(1st trip) DTC

1st trip DTC — 1st trip DTC
DTC (= MIL “ON”)

SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT”

OK: Self-diagnosis is carried out and the result is OK.

NG: Self-diagnosis is carried out and the result is NG.
—: Self-diagnosis is not carried out.
When all SRT related self-diagnoses showed OK results in a single cycle (Ignition OFF-ON-OFF), the SRT
will indicate “CMPLT”. , Case 1 above
When all SRT related self-diagnoses showed OK results through several different cycles, the SRT will indi-
cate “CMPLT” at the time the respective self-diagnoses have at least one OK result. , Case 2 above
EC-46
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)
If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also indi-
cate “CMPLT”. , Case 3 above
The table above shows that the minimum number of cycles for setting SRT as “INCMP” is one (1) for each GI
self-diagnosis (Case 1 & 2) or two (2) for one of self-diagnoses (Case 3). However, in preparation for the state
emissions inspection, it is unnecessary of each self-diagnosis to be executed twice (Case 3) for the following
reasons: MA
I The SRT will indicate “CMPLT” at the time the respective self-diagnoses have one (1) OK result.
I The emissions inspection requires “CMPLT” of the SRT only with OK self-diagnosis results.
I When, during SRT driving pattern, 1st trip DTC (NG) is detected prior to “CMPLT” of SRT, the self-diag-
EM
nosis memory must be erased from ECM after repair.
I If the 1st trip DTC is erased, all the SRT will indicate “INCMP”. LC
NOTE:
SRT can be set as “CMPLT” together with the DTC(s). Therefore, DTC check must always be carried out prior
to the state emission inspection even though the SRT indicates “CMPLT”.
SRT Service Procedure NFEC0695S1303
If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review FE
the flowchart diagnostic sequence on the next page.

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-47
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)

SEF573XB

*1 EC-44 *2 EC-48 *3 EC-49

How to Display SRT Code NFEC0695S1304

With CONSULT-II
Selecting “SRT STATUS” in “DTC CONFIRMATION” mode with CONSULT-II.
For items whose SRT codes are set, a “CMPLT” is displayed on the CONSULT-II screen; for items whose SRT
codes are not set, “INCMP” is displayed as shown below.

EC-48
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)

GI

MA

EM

SEC183C LC
With GST
Selecting Mode 1 with GST (Generic Scan Tool)
How to Set SRT Code NFEC0695S1305
To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each FE
diagnosis may require a long period of actual driving under various conditions.
With CONSULT-II
Perform corresponding DTC Confirmation Procedure one by one based on “Performance Priority” in the table CL
on EC-45.
Without CONSULT-II
The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The MT
driving pattern should be performed one or more times to set all SRT codes.
AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-49
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)
Driving Pattern NFEC0695S1306

SEC184C

EC-50
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)
I The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driv-
ing habits, etc.
Zone A refers to the range where the time required, for the diagnosis under normal conditions*, is the GI
shortest.
Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed
within zone A. MA
*: Normal conditions refer to the following:
− Sea level
EM
− Flat road
− Ambient air temperature: 20 - 30°C (68 - 86°F)
− Diagnosis is performed as quickly as possible under normal conditions. LC
Under different conditions [For example: ambient air temperature other than 20 - 30°C (68 - 86°F)], diag-
nosis may also be performed.
Pattern 1:
I The engine is started at the engine coolant temperature of −10 to 35°C (14 to 95°F)
(where the voltage between the ECM terminal 70 and ground is 3.0 - 4.3V).
FE
I The engine must be operated at idle speed until the engine coolant temperature is greater than 70°C
(158°F) (where the voltage between the ECM terminal 70 and ground is lower than 1.4V).
I The engine is started at the fuel tank temperature of warmer than 0°C (32°F) (where the voltage CL
between the ECM terminal 92 and ground is less than 4.1V).
Pattern 2:
I When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted. MT
In this case, the time required for diagnosis may be extended.
Pattern 3: AT
I The driving pattern outlined in *2 must be repeated at least 3 times.
Pattern 4:
I Tests are performed after the engine has been operated for at least 17 minutes. AX
I The accelerator pedal must be held very steady during steady-state driving.
I If the accelerator pedal is moved, the test must be conducted all over again. SU
*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal
and keep it released for more than 10 seconds. Depress the accelerator pedal until vehicle speed is 90 km/h
(56 MPH) again. BR
*2: Operate the vehicle in the following driving pattern.
1) Decelerate vehicle to 0 km/h (0 MPH) and let engine idle.
2) Repeat driving pattern shown below at least 10 times.
ST
I During acceleration, hold the accelerator pedal as steady as possible.
RS

BT

HA

SC
SEF414S
EL
*3: Checking the vehicle speed with GST is advised.
Suggested Transmission Gear Position
Set the selector lever in the “D” position with the overdrive switch turned ON. IDX
TEST VALUE AND TEST LIMIT (GST ONLY — NOT APPLICABLE TO CONSULT-II) NFEC0695S14
The following is the information specified in Mode 6 of ISO 15031-5.
The test value is a parameter used to determine whether a system/circuit diagnostic test is “OK” or “NG” while
being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the
EC-51
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)
maximum or minimum value and is compared with the test value being monitored.
Items for which these data (test value and test limit) are displayed are the same as SRT code items (26 test
items).
These data (test value and test limit) are specified by Test ID (TID) and Component ID (CID) and can be dis-
played on the GST screen.
X: Applicable —: Not applicable

Test value (GST display)

SRT item Self-diagnostic test item Test limit Application
TID CID

Three way catalyst function

01H 01H Max. X
(bank 1)
CATALYST
Three way catalyst function
03H 02H Max. X
(bank 2)

09H 04H Max. X

0AH 84H Min. X

Heated oxygen sensor 1 (front)
0BH 04H Max. X
(bank 1)
0CH 04H Max. X

0DH 04H Max. X

11H 05H Max. X

12H 85H Min. X

Heated oxygen sensor 1 (front)
13H 05H Max. X
(bank 2)
14H 05H Max. X
O2 SENSOR
15H 05H Max. X

19H 86H Min. X

Heated oxygen sensor 2 (rear) 1AH 86H Min. X

(bank 1) 1BH 06H Max. X

1CH 06H Max. X

21H 87H Min. X

Heated oxygen sensor 2 (rear) 22H 87H Min. X

(bank 2) 23H 07H Max. X

24H 07H Max. X

Heated oxygen sensor 1 heater (front) 29H 08H Max. X

(bank 1) 2AH 88H Min. X

Heated oxygen sensor 1 heater (front) 2BH 09H Max. X

(bank 2) 2CH 89H Min. X
O2 SENSOR HEATER
Heated oxygen sensor 2 heater (rear) 2DH 0AH Max. X
(bank 1) 2EH 8AH Min. X

Heated oxygen sensor 2 heater (rear) 2FH 0BH Max. X

(bank 2) 30H 8BH Min. X

EC-52
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS NFEC0695S15
X: Applicable —: Not applicable

Test value/ Test

GI
Items
DTC*1 SRT code limit 1st trip DTC*1 Reference page
(CONSULT-II screen terms)
(GST only)
MA
NO DTC IS DETECTED.
FURTHER TESTING P0000 — — — —
MAY BE REQUIRED. EM
MAF SEN/CIRCUIT P0100 — — X EC-125

AIR TEMP SEN/CIRC P0110 — — X EC-131 LC

COOLANT T SEN/CIRC P0115 — — X EC-136

THRTL POS SEN/CIRC P0120 — — X EC-141

HO2S1 (B1) P0130 X X X*2 EC-148

HO2S1 (B1) P0131 X X X*2 EC-157 FE

HO2S1 (B1) P0132 X X X*2 EC-164

HO2S1 (B1) P0133 X X X*2 EC-171

CL
HO2S1 (B1) P0134 X X X*2 EC-183
MT
HO2S1 HTR (B1) P0135 X X X*2 EC-191

HO2S2 (B1) P0137 X X X*2 EC-198

AT
HO2S2 (B1) P0138 X X X*2 EC-209

HO2S2 (B1) P0139 X X X*2 EC-220

AX
HO2S2 (B1) P0140 X X X*2 EC-231

HO2S2 HTR (B1) P0141 X X X*2 EC-240

SU
HO2S1 (B2) P0150 X X X*2 EC-148

HO2S1 (B2) P0151 X X X*2 EC-157 BR

HO2S1 (B2) P0152 X X X*2 EC-164

HO2S1 (B2) P0153 X X X*2 EC-171 ST

HO2S1 (B2) P0154 X X X*2 EC-183

HO2S1 HTR (B2) P0155 X X X*2 EC-191 RS

HO2S2 (B2) P0157 X X X*2 EC-198

HO2S2 (B2) P0158 X X X*2 EC-209 BT

HO2S2 (B2) P0159 X X X*2 EC-220

HO2S2 (B2) P0160 X X X*2 EC-231 HA

HO2S2 HTR (B2) P0161 X X X*2 EC-240

FUEL SYS-LEAN/BK1 P0171 — — X EC-247

SC
FUEL SYS-RICH/BK1 P0172 — — X EC-255

FUEL SYS-LEAN/BK2 P0174 — — X EC-247

EL
FUEL SYS-RICH/BK2 P0175 — — X EC-255
IDX
FUEL TEMP SEN/CIRC P0180 — — X EC-262

MULTI CYL MISFIRE P0300 — — X EC-267

CYL 1 MISFIRE P0301 — — X EC-267

EC-53
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)

Test value/ Test

Items
DTC*1 SRT code limit 1st trip DTC*1 Reference page
(CONSULT-II screen terms)
(GST only)

CYL 2 MISFIRE P0302 — — X EC-267

CYL 3 MISFIRE P0303 — — X EC-267

CYL 4 MISFIRE P0304 — — X EC-267

CYL 5 MISFIRE P0305 — — X EC-267

CYL 6 MISFIRE P0306 — — X EC-267

KNOCK SEN/CIRC-B1 P0325 — — — EC-275

CKP SEN/CIRCUIT P0335 — — X EC-280

CMP SEN/CIRCUIT P0340 — — X EC-288

TW CATALYST SYS-B1 P0420 X X X*2 EC-294

TW CATALYST SYS-B2 P0430 X X X*2 EC-294

PURG VOLUME CONT/V P0443 — — X EC-299

VEH SPEED SEN/CIRC P0500 — — X EC-305

IACV/AAC VLV/CIRC P0505 — — X EC-309

CLOSED TP SW/CIRC P0510 — — X EC-318

ECM P0605 — — X EC-326

PNP SW/CIRC P0705 — — X AT-440

ATF TEMP SEN/CIRC P0710 — — X AT-446

VEH SPD SEN/CIR AT P0720 — — X AT-452

ENGINE SPEED SIG P0725 — — X AT-457

A/T 1ST GR FNCTN P0731 — — X AT-462

A/T 2ND GR FNCTN P0732 — — X AT-468

A/T 3RD GR FNCTN P0733 — — X AT-474

A/T 4TH GR FNCTN P0734 — — X AT-480

TCC SOLENOID/CIRC P0740 — — X AT-489

L/PRESS SOL/CIRC P0745 — — X AT-494

SFT SOL A/CIRC P0750 — — X AT-500

SFT SOL B/CIRC P0755 — — X AT-505

SWIRL CONT SOL/V P1131 — — X EC-328

ENG OVER TEMP P1217 — — X EC-335

CKP SEN (REF)/CIRC P1335 — — X EC-364

CKP SENSOR (COG) P1336 — — X EC-370

A/T DIAG COMM LINE P1605 — — X EC-378

TP SEN/CIRC A/T P1705 — — X AT-510

P-N POS SW/CIRCUIT P1706 — — X EC-381

O/R CLTCH SOL/CIRC P1760 — — X AT-519

*1: 1st trip DTC No. is the same as DTC No.

*2: These are not displayed with GST.
NOTE:

EC-54
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)
Regarding A33 models, “-B1” and “BK1” indicate bank 1 and “-B2” and “BK2” indicate bank 2.

HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION

How to Erase DTC ( With CONSULT-II)
NFEC0695S16
GI
NFEC0695S1601
NOTE:
If the DTC is not for A/T related items (see EC-9), skip steps 2 through 4. MA
1) If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least
10 seconds and then turn it “ON” (engine stopped) again.
2) Turn CONSULT-II “ON” and touch “A/T”. EM
3) Touch “SELF-DIAG RESULTS”.
4) Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch “BACK” LC
twice.
5) Touch “ENGINE”.
6) Touch “SELF-DIAG RESULTS”.
7) Touch “ERASE”. (The DTC in the ECM will be erased.)
I If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased
individually from the ECM and TCM (Transmission control module). FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC
SEF823YA

The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF- EL
DIAG RESULTS” mode with CONSULT-II.
How to Erase DTC ( With GST) NFEC0695S1602
IDX
NOTE:
If the DTC is not for A/T related items (see EC-9), skip step 2.
1) If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least
10 seconds and then turn it “ON” (engine stopped) again.

EC-55
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Emission-related Diagnostic Information (Cont’d)
2) Perform “SELF-DIAGNOSTIC PROCEDURE (Without CONSULT-II)” in AT section titled “TROUBLE
DIAGNOSIS”, “Self-diagnosis”. (The engine warm-up step can be skipped when performing the diagnosis
only to erase the DTC.)
3) Select Mode 4 with GST (Generic Scan Tool).
The emission related diagnostic information in the ECM can be erased by selecting Mode 4 with GST.
I If the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
I The following data are cleared when the ECM memory is erased.
1) Diagnostic trouble codes
2) 1st trip diagnostic trouble codes
3) Freeze frame data
4) 1st trip freeze frame data
5) System readiness test (SRT) codes
6) Test values
7) Distance traveled while MIL is activated
8) Others
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but
all of the data listed above, are cleared from the ECM memory during work procedures.
NVIS (Nissan Vehicle Immobilizer System —
NATS) NFEC0696

SEF515Y

I If the security indicator lights up with the ignition switch in the “ON” position or “NATS MALFUNC-
TION” is displayed on “SELF-DIAG RESULTS” screen, perform self-diagnostic results mode with
CONSULT-II using NATS program card. Refer to “NVIS (Nissan Vehicle Immobilizer System —
NATS)” in EL section.
I Confirm no self-diagnostic results of NVIS (NATS) is displayed before touching “ERASE” in “SELF-
DIAG RESULTS” mode with CONSULT-II.
I When replacing ECM, initialization of NVIS (NATS) system and registration of all NVIS (NATS) igni-
tion key IDs must be carried out with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of NVIS (NATS)
initialization and NVIS (NATS) ignition key ID registration, refer to CONSULT-II operation manual,
IVIS/NVIS.

EC-56
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Malfunction Indicator Lamp (MIL)

Malfunction Indicator Lamp (MIL)

DESCRIPTION NFEC0697
GI

MA

EM

LC

SAT652J

The MIL is located on the instrument panel.

1. The MIL will light up when the ignition switch is turned ON without the engine running. This is a bulb check. FE
I If the MIL does not light up, refer to EL-164, WARNING LAMPS or see EC-451.
2. When the engine is started, the MIL should go off. CL
If the MIL remains on, the ECM’s CPU is malfunctioning.
On Board Diagnostic System Function
The on board diagnostic system has the following two functions.
NFEC0697S01
MT
Diagnostic Test KEY and ENG. Function Explanation of Function
Mode Status AT
Mode I Ignition switch in BULB CHECK This function checks the MIL bulb for damage (blown,
ON position open circuit, etc.).
If the MIL does not come on, check MIL circuit. (See
AX
EC-451.)

Engine stopped SU

BR
Engine running MALFUNCTION This is a usual driving condition. When the ECM’s CPU
WARNING is malfunctioning, the MIL will light up to inform the
driver that a malfunction has been detected. ST

Diagnostic Test Mode I — Bulb Check NFEC0697S03 RS

In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to EL-164,
“WARNING LAMPS” or see EC-451.
Diagnostic Test Mode I — Malfunction Warning
BT
NFEC0697S04

MIL Condition
HA
ON When the ECM’s CPU is malfunctioning.

OFF No malfunction.
SC
OBD System Operation Chart NFEC0698
RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS NFEC0698S01
EL
I When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are
stored in the ECM memory.
I When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
IDX
stored in the ECM memory, and the MIL will come on. For details, refer to “Two Trip Detection Logic” on
EC-43.
I The MIL will go off after the vehicle is driven 3 times with no malfunction. The drive is counted only when

EC-57
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
OBD System Operation Chart (Cont’d)
the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs while counting,
the counter will reset.
I The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A)
without the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel
Injection System, the DTC and freeze frame data will be stored until the vehicle is driven 80 times (driv-
ing pattern C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC RESULTS”
mode of CONSULT-II will count the number of times the vehicle is driven.
I The 1st trip DTC is not displayed when the self-diagnosis results in “OK” for the 2nd trip.
SUMMARY CHART NFEC0698S02

Items Fuel Injection System Misfire Other

MIL (goes off) 3 (pattern B) 3 (pattern B) 3 (pattern B)

DTC, Freeze Frame Data (no display) 80 (pattern C) 80 (pattern C) 40 (pattern A)

1st Trip DTC (clear) 1 (pattern C), *1 1 (pattern C), *1 1 (pattern B)

1st Trip Freeze Frame Data (clear) *1, *2 *1, *2 1 (pattern B)

For details about patterns “B” and “C” under “Fuel Injection System” and “Misfire”, see EC-60.
For details about patterns “A” and “B” under “Other”, see EC-62.
*1: Clear timing is at the moment OK is detected.
*2: Clear timing is when the same malfunction is detected in the 2nd trip.

EC-58
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
OBD System Operation Chart (Cont’d)
RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS FOR
“MISFIRE” <EXHAUST QUALITY DETERIORATION>, “FUEL INJECTION SYSTEM” NFEC0698S03
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

SEF392SB
HA

*1: When the same malfunction is data will not be displayed any freeze frame data will be cleared
detected in two consecutive trips, longer after vehicle is driven 80 at the moment OK is detected.
SC
MIL will light up. times (pattern C) without the same *7: When the same malfunction is
*2: MIL will go off after vehicle is malfunction. detected in the 2nd trip, the 1st
driven 3 times (pattern B) without (The DTC and the freeze frame trip freeze frame data will be EL
any malfunctions. data still remain in ECM.) cleared.
*3: When the same malfunction is *5: When a malfunction is detected *8: 1st trip DTC will be cleared when
detected in two consecutive trips, for the first time, the 1st trip DTC vehicle is driven once (pattern C) IDX
the DTC and the freeze frame and the 1st trip freeze frame data without the same malfunction after
data will be stored in ECM. will be stored in ECM. DTC is stored in ECM.
*4: The DTC and the freeze frame *6: The 1st trip DTC and the 1st trip

EC-59
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
OBD System Operation Chart (Cont’d)
EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM” NFEC0698S04
Driving Pattern B NFEC0698S0401
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
I The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
I The B counter will be counted up when driving pattern B is satisfied without any malfunction.
I The MIL will go off when the B counter reaches 3. (*2 in EC-59)
Driving Pattern C NFEC0698S0402
Driving pattern C means the vehicle operation as follows:
1) The following conditions should be satisfied at the same time:
Engine speed: (Engine speed in the freeze frame data) ±375 rpm
Calculated load value: (Calculated load value in the freeze frame data) × (1±0.1) [%]
Engine coolant temperature (T) condition:
I When the freeze frame data shows lower than 70°C (158°F), “T” should be lower than 70°C (158°F).
I When the freeze frame data shows higher than or equal to 70°C (158°F), “T” should be higher than or
equal to 70°C (158°F).
Example:
If the stored freeze frame data is as follows:
Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80°C (176°F)
To be satisfied with driving pattern C, the vehicle should run under the following conditions:
Engine speed: 475 - 1,225 rpm, Calculated load value: 27 - 33%, Engine coolant temperature: more than 70°C
(158°F)
I The C counter will be cleared when the malfunction is detected regardless of driving pattern C.
I The C counter will be counted up when driving pattern C is satisfied without the same malfunction.
I The DTC will not be displayed after C counter reaches 80.
I The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC
is stored in ECM.

EC-60
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
OBD System Operation Chart (Cont’d)
RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS EXCEPT
FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”NFEC0698S05
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

SEF393SB
HA

*1: When the same malfunction is *4: The DTC and the freeze frame and the 1st trip freeze frame data
detected in two consecutive trips, data will not be displayed any will be stored in ECM.
SC
MIL will light up. longer after vehicle is driven 40 *6: 1st trip DTC will be cleared after
*2: MIL will go off after vehicle is times (pattern A) without the same vehicle is driven once (pattern B)
driven 3 times (pattern B) without malfunction. without the same malfunction. EL
any malfunctions. (The DTC and the freeze frame *7: When the same malfunction is
*3: When the same malfunction is data still remain in ECM.) detected in the 2nd trip, the 1st
detected in two consecutive trips, *5: When a malfunction is detected trip freeze frame data will be IDX
the DTC and the freeze frame for the first time, the 1st trip DTC cleared.
data will be stored in ECM.

EC-61
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
OBD System Operation Chart (Cont’d)
EXPLANATION FOR DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM” NFEC0698S06
Driving Pattern A NFEC0698S0601

AEC574

I The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
I The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.
I The DTC will not be displayed after the A counter reaches 40.
Driving Pattern B NFEC0698S0602
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
I The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
I The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
I The MIL will go off when the B counter reaches 3 (*2 in EC-61).

EC-62
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II

CONSULT-II =NFEC0699
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
NFEC0699S01
GI
2. Connect CONSULT-II to data link connector, which is located
under drivers side dash panel. MA

EM

SEF036YA LC
3. Turn ignition switch ON.
4. Touch “START”.

FE

CL

PBR455D
MT
5. Touch “ENGINE”.
AT

AX

SU

BR
SEF995X

6. Perform each diagnostic test mode according to each service

procedure. ST
For further information, see the CONSULT-II Operation
Manual. RS

BT

HA
SEF824Y

SC

EL

IDX

EC-63
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)
ENGINE CONTROL COMPONENT PARTS/CONTROL
SYSTEMS APPLICATION NFEC0699S02

DIAGNOSTIC TEST MODE

SELF-DIAGNOSTIC DTC & SRT

RESULTS DATA CONFIRMATION
Item WORK DATA
MONI- ACTIVE DTC
SUP- FREEZE MONI-
TOR TEST SRT WORK
PORT DTC*1 FRAME TOR
(SPEC) STATUS SUP-
DATA*2
PORT

Crankshaft position sensor

X X X X
(POS)

Crankshaft position sensor (REF) X X X

Mass air flow sensor X X X

Engine coolant temperature sen-

X X X X X
sor

Heated oxygen sensor 1 (front) X X X X X

Heated oxygen sensor 2 (rear) X X X X X

ENGINE CONTROL COMPONENT PARTS

Vehicle speed sensor X X X X

Throttle position sensor X X X

Fuel tank temperature sensor X X X

Absolute pressure sensor X X

INPUT

Intake air temperature sensor X X X

Knock sensor X

Ignition switch (start signal) X X

Closed throttle position switch X X X

Closed throttle position switch

X X
(throttle position sensor signal)

Air conditioner switch X X

Park/neutral position (PNP)

X X X
switch

Power steering oil pressure

X X
switch

Battery voltage X X

Ambient air temperature switch X X

Load signal X X

EC-64
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)

DIAGNOSTIC TEST MODE

SELF-DIAGNOSTIC DTC & SRT GI

RESULTS DATA CONFIRMATION
Item WORK DATA
MONI- ACTIVE DTC
SUP- MONI-
PORT
FREEZE
TOR
TOR TEST SRT WORK MA
DTC*1 FRAME (SPEC) STATUS SUP-
DATA*2
PORT
EM
Injectors X X X

Power transistor (Ignition timing) X X X

LC
IACV-AAC valve X X X X
ENGINE CONTROL COMPONENT PARTS

EVAP canister purge volume

X X X X X
control solenoid valve

Air conditioner relay X X

FE
Fuel pump relay X X X X
OUTPUT

Cooling fan X X X X
CL
Heated oxygen sensor 1 heater
X X X X
(front)

Heated oxygen sensor 2 heater MT

X X X X
(rear)

Swirl control valve control sole-

X X X X AT
noid valve

Electronic controlled engine

mount
X X X AX
Calculated load value X X X

X: Applicable
SU
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-44. BR
FUNCTION NFEC0699S03
ST
Diagnostic test mode Function

This mode enables a technician to adjust some devices faster and more accurately by following the
Work support
indications on the CONSULT-II unit. RS
Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame
Self-diagnostic results
data can be read and erased quickly.*1 BT
Data monitor Input/Output data in the ECM can be read.

Data monitor (spec)

Input/Output specifications of the basic fuel schedule, AFM, A/F feedback control value and the HA
other data monitor items can be read.

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also
Active test
shifts some parameters in a specified range. SC
DTC confirmation The status of system monitoring tests and the self-diagnosis status/result can be confirmed.

ECM part number ECM part numbers can be read.

EL
*1 The following emission-related diagnostic information is cleared when the ECM memory is erased.
1) Diagnostic trouble codes IDX
2) 1st trip diagnostic trouble codes
3) Freeze frame data
4) 1st trip freeze frame data
5) System readiness test (SRT) codes
6) Test values

EC-65
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)
7) Distance traveled while MIL is activated.
8) Others

WORK SUPPORT MODE NFEC0699S04

WORK ITEM CONDITION USAGE

I FOLLOW THE BASIC INSPECTION INSTRUCTION IN When adjusting the idle throttle
TP SW/TP SEN IDLE POSI ADJ
THE SERVICE MANUAL. position

FUEL PRESSURE RELEASE I FUEL PUMP WILL STOP BY TOUCHING “START” When releasing fuel pressure
DURING IDLING. from fuel line
CRANK A FEW TIMES AFTER ENGINE STALLS.

IDLE AIR VOL LEARN I THE IDLE AIR VOLUME THAT KEEPS THE ENGINE When learning the idle air volume
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.

SELF-LEARNING CONT I THE COEFFICIENT OF SELF-LEARNING CONTROL When clear the coefficient of self-
MIXTURE RATIO RETURNS TO THE ORIGINAL learnign control value
COEFFICIENT.

TARGET IDLE RPM ADJ* I IDLE CONDITION When setting target idle speed

TARGET IGNITION TIMING ADJ* I IDLE CONDITION When adjusting target ignition tim-
ing
After adjustment, confirm target
ignition timing with a timing light.

*: This function is not necessary in the usual service procedure.

SELF-DIAGNOSTIC MODE NFEC0699S05

DTC and 1st Trip DTC NFEC0699S0501
Regarding items of “DTC and 1st trip DTC”, refer to “TROUBLE
DIAGNOSIS — INDEX” (See EC-9.)
Freeze Frame Data and 1st Trip Freeze Frame Data
NFEC0699S0502

Freeze frame data

Description
item*1

DIAG TROUBLE
I The engine control component part/control system has a trouble code, it is displayed as “PXXXX”.
CODE
(Refer to “TROUBLE DIAGNOSIS — INDEX”, EC-9.)
[PXXXX]

I “Fuel injection system status” at the moment a malfunction is detected is displayed.

FUEL SYS-B1*2 I One mode in the following is displayed.
“MODE 2”: Open loop due to detected system malfunction
“MODE 3”: Open loop due to driving conditions (power enrichment, deceleration enrichment)
FUEL SYS-B2*2 “MODE 4”: Closed loop - using oxygen sensor(s) as feedback for fuel control
“MODE 5”: Open loop - has not yet satisfied condition to go to closed loop

CAL/LD VALUE [%] I The calculated load value at the moment a malfunction is detected is displayed.

COOLANT TEMP [°C]

I The engine coolant temperature at the moment a malfunction is detected is displayed.
or [°F]

S-FUEL TRIM-B1 [%] I “Short-term fuel trim” at the moment a malfunction is detected is displayed.
I The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
S-FUEL TRIM-B2 [%] schedule.

L-FUEL TRIM-B1 [%] I “Long-term fuel trim” at the moment a malfunction is detected is displayed.
I The long-term fuel trim indicates much more gradual feedback compensation to the base fuel sched-
L-FUEL TRIM-B2 [%] ule than short-term fuel trim.

ENGINE SPEED [rpm] I The engine speed at the moment a malfunction is detected is displayed.

VHCL SPEED [km/h] or

I The vehicle speed at the moment a malfunction is detected is displayed.
[mph]

EC-66
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)

Freeze frame data

Description
item*1
GI
ABSOL TH·P/S [%] or
I The throttle valve opening at the moment a malfunction is detected is displayed.
[degree]

B/FUEL SCHDL [msec] I The base fuel schedule at the moment a malfunction is detected is displayed. MA
INT/A TEMP SE [°C] or
I The intake air temperature at the moment a malfunction is detected is displayed.
[°F] EM
*1: The items are the same as those of 1st trip freeze frame data.
*2: Regarding A33 model, “-B1” indicates bank 1 and “-B2” indicates bank 2.
LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-67
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)
DATA MONITOR MODE =NFEC0699S06

ECM
Main
Monitored item [Unit] input Description Remarks
signals
signals

I Indicates the engine speed computed

ENG SPEED [rpm] q q from the REF signal (120° signal) of
the crankshaft position sensor (REF).

I Accuracy becomes poor if engine

I Indicates the engine speed computed speed drops below the idle rpm.
CKPS·RPM (POS)
q from the POS signal (1° signal) of the I If the signal is interrupted while the
[rpm]
crankshaft position sensor (POS). engine is running, an abnormal value
may be indicated.

I Indicates the number of signal plate

POS COUNT q (Flywheel/Drive Plate) cogs (tooth) dur-
ing one revolution of the engine.

I The signal voltage of the mass air flow I When the engine is stopped, a certain
MAS A/F SE-B1 [V] q q
sensor is displayed. value is indicated.

I When the engine coolant temperature

I The engine coolant temperature (deter-
sensor is open or short-circuited, ECM
COOLAN TEMP/S mined by the signal voltage of the
q q enters fail-safe mode. The engine cool-
[°C] or [°F] engine coolant temperature sensor) is
ant temperature determined by the
displayed.
ECM is displayed.

HO2S1 (B1) [V] q q I The signal voltage of the heated oxy-

HO2S1 (B2) [V] q q gen sensor 1 (front) is displayed.

HO2S2 (B1) [V] q q I The signal voltage of the heated oxy-

HO2S2 (B2) [V] q q gen sensor 2 (rear) is displayed.

I Display of heated oxygen sensor 1

HO2S1 MNTR (B1) (front) signal during air-fuel ratio feed-
q I After turning ON the ignition switch,
[RICH/LEAN] back control:
“RICH” is displayed until air-fuel mix-
RICH ... means the mixture became
ture ratio feedback control begins.
“rich”, and control is being affected
I When the air-fuel ratio feedback is
toward a leaner mixture.
clamped, the value just before the
HO2S1 MNTR (B2) LEAN ... means the mixture became
q clamping is displayed continuously.
[RICH/LEAN] “lean”, and control is being affected
toward a rich mixture.

I Display of heated oxygen sensor 2

HO2S2 MNTR (B1) (rear) signal:
q
[RICH/LEAN] RICH ... means the amount of oxygen
after three way catalyst is relatively I When the engine is stopped, a certain
small. value is indicated.
HO2S2 MNTR (B2) LEAN ... means the amount of oxygen
q after three way catalyst is relatively
[RICH/LEAN]
large.

I The vehicle speed computed from the

VHCL SPEED SE
q q vehicle speed sensor signal is dis-
[km/h] or [mph]
played.

I The power supply voltage of ECM is

BATTERY VOLT [V] q q
displayed.

I The throttle position sensor signal volt-

THRTL POS SEN [V] q q
age is displayed.

I The fuel temperature judged from the

FUEL T/TMP SE
q fuel tank temperature sensor signal
[°C] or [°F]
voltage is displayed.

EC-68
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)

ECM
Main
Monitored item [Unit] input Description Remarks
signals
signals GI
I The intake air temperature determined
INT/A TEMP SE
q q by the signal voltage of the intake air MA
[°C] or [°F]
temperature sensor is indicated.

START SIGNAL I Indicates [ON/OFF] condition from the I After starting the engine, [OFF] is dis-
q q EM
[ON/OFF] starter signal. played regardless of the starter signal.

I Indicates mechanical contact [ON/OFF]

CLSD THL/P SW
q condition of the closed throttle position LC
[ON/OFF]
switch.

I Indicates idle position [ON/OFF] com-

CLSD THL POS
q q puted by ECM according to the throttle
[ON/OFF]
position sensor signal.

I Indicates [ON/OFF] condition of the air

AIR COND SIG
q q conditioner switch as determined by
FE
[ON/OFF]
the air conditioner signal.

P/N POSI SW
I Indicates [ON/OFF] condition from the CL
q q park/neutral position (PNP) switch sig-
[ON/OFF]
nal.

I [ON/OFF] condition of the power steer-

MT
PW/ST SIGNAL ing oil pressure switch determined by
q q
[ON/OFF] the power steering oil pressure signal
is indicated. AT
AMB TEMP SW I Indicates [ON/OFF] condition from the
q
[ON/OFF] ambient air temperature switch signal. AX
IGNITION SW I Indicates [ON/OFF] condition from igni-
q
[ON/OFF] tion switch.
SU
INJ PULSE-B1 [msec] q I Indicates the actual fuel injection pulse
I When the engine is stopped, a certain
width compensated by ECM according
computed value is indicated.
INJ PULSE-B2 [msec] to the input signals. BR
I “Base fuel schedule” indicates the fuel
injection pulse width programmed into
B/FUEL SCHDL [msec] q ST
ECM, prior to any learned on board
correction.

I Indicates the ignition timing computed I When the engine is stopped, a certain RS
IGN TIMING [BTDC] q
by ECM according to the input signals. value is indicated.

I Indicates the IACV-AAC valve control

IACV-AAC/V [step] q value computed by ECM according to BT
the input signals.

I Indicates the EVAP canister purge vol-

ume control solenoid valve control
HA
value computed by the ECM according
PURG VOL C/V [%]
to the input signals.
I The opening becomes larger as the SC
value increases.

q I When the engine is stopped, a certain EL

A/F ALPHA-B1 [%] I The mean value of the air-fuel ratio
value is indicated.
feedback correction factor per cycle is
I This data also includes the data for the
A/F ALPHA-B2 [%] q indicated.
air-fuel ratio learning control. IDX
I The air conditioner relay control condi-
AIR COND RLY
q tion (determined by ECM according to
[ON/OFF]
the input signal) is indicated.

EC-69
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)

ECM
Main
Monitored item [Unit] input Description Remarks
signals
signals

I Indicates the fuel pump relay control

FUEL PUMP RLY
condition determined by ECM accord-
[ON/OFF]
ing to the input signals.

I Indicates the control condition of the

cooling fan (determined by ECM
COOLING FAN according to the input signal).
[ON/OFF] HIGH ... High speed operation
LOW ... Low speed operation
OFF ... Stop

HO2S1 HTR (B1) I Indicates [ON/OFF] condition of heated

[ON/OFF] oxygen sensor 1 heater (front) deter-
HO2S1 HTR (B2) mined by ECM according to the input
[ON/OFF] signals.

HO2S2 HTR (B1) I Indicates [ON/OFF] condition of heated

[ON/OFF] oxygen sensor 2 heater (rear) deter-
HO2S2 HTR (B2) mined by ECM according to the input
[ON/OFF] signals.

I “Calculated load value” indicates the

CAL/LD VALUE [%] value of the current airflow divided by
peak airflow.

I “Absolute throttle position sensor” indi-

cates the throttle opening computed by
ABSOL TH·P/S [%]
ECM according to the signal voltage of
the throttle position sensor.

I Indicates the mass airflow computed

MASS AIRFLOW
by ECM according to the signal voltage
[g·m/s]
of the mass airflow sensor.

I The signal voltage of the absolute

ABSOL PRES/SE [V] q
pressure sensor is displayed.

I The control condition of the swirl con-

trol valve control solenoid valve (deter-
SWRL CONT S/V mined by ECM according to the input
[ON/OFF] signals) is indicated.
I ON ... Swirl control valve is closed.
OFF ... Swirl control valve is opened.

I Indicates [ON/OFF] condition from the

electrical load signal and/or lighting
switch.
LOAD SIGNAL
q q ON ... rear defogger is operating
[ON/OFF]
and/or lighting switch is on.
OFF ... rear defogger is not operating
and lighting switch is not on.

TRVL AFTER MIL I Distance traveled while MIL is acti-

[km] or [Mile] vated

I This item is not available. A certain

FPCM DR VOLT [V]
value is indicated.

EC-70
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)

ECM
Main
Monitored item [Unit] input Description Remarks
signals
signals GI
I The control condition of the VIAS con-
trol solenoid valve (determined by MA
ECM according to the input signal) is
VIAS S/V indicated.
[ON/OFF] I OFF ... VIAS control solenoid valve is
not operating.
EM
ON ... VIAS control solenoid valve is
operating.
LC
I The control condition of the electronic
controlled engine mount (computed by
ENGINE MOUNT ECM according to the input signals) is
[IDLE/TRVL] indicated.
I IDLE ... Idle condition
I TRVL ... Driving condition
FE
I Display the condition of idle air volume
learning
YET ... Idle air volume learning has not CL
been performed yet.
IDL A/V LEAN
CMPLT ... Idle air volume learning has
already been performed successfully. MT
INCMP ... Idle air volume learning has
not been performed successfully.

I Voltage measured by the voltage AT

Voltage [V]
probe.

I Only “#” is displayed if item is unable AX

to be measured.
Frequency I Pulse width, frequency or duty cycle I Figures with “#”s are temporary ones.
[msec] or [Hz] or [%] measured by the pulse probe. They are the same figures as an actual
piece of data which was just previously
SU
measured.
NOTE: BR
I Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
I Regarding A33 model, “-B1” indicates bank 1 and “-B2” indicates bank 2.

DATA MONITOR (SPEC) MODE ST

NFEC0699S07

ECM
Main RS
Monitored item [Unit] input Description Remarks
signals
signals

I The signal voltage of the mass air flow sen- I When the engine is running, specifi-
MAS A/F SE-B1 [V] q q
sor specification is displayed. cation range is indicated.
BT
I “Base fuel schedule” indicates the fuel injec-
B/FUEL SCHDL I When the engine is running, specifi-
[msec]
q tion pulse width programmed into ECM,
cation range is indicated.
HA
prior to any learned on board correction.

q I When the engine is running, specifi-

A/F ALPHA-B1 [%]
I Indicates the mean value of the air-fuel ratio cation range is indicated.
SC
feedback correction factor per cycle. I This data also includes the data for
A/F ALPHA-B2 [%] q the air-fuel ratio learning control.
EL
NOTE:
I Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
I Regarding A33 model, “B1” indicates bank 1 and “B2” indicates bank 2. IDX

EC-71
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)
ACTIVE TEST MODE NFEC0699S08

TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)

I Engine: Return to the original

I Harness and connector
trouble condition If trouble symptom disappears, see
FUEL INJECTION I Fuel injectors
I Change the amount of fuel injec- CHECK ITEM.
I Heated oxygen sensor 1 (front)
tion using CONSULT-II.

I Engine: After warming up, idle

the engine.
IACV-AAC/V Engine speed changes according I Harness and connector
I Change the IACV-AAC valve
OPENING to the opening percent. I IACV-AAC valve
opening percent using CON-
SULT-II.

I Engine: Return to the original I Harness and connector

ENG COOLANT trouble condition If trouble symptom disappears, see I Engine coolant temperature sen-
TEMP I Change the engine coolant tem- CHECK ITEM. sor
perature using CONSULT-II. I Fuel injectors

I Engine: Return to the original

trouble condition
If trouble symptom disappears, see
IGNITION TIMING I Timing light: Set I Adjust initial ignition timing
CHECK ITEM.
I Retard the ignition timing using
CONSULT-II.

I Engine: After warming up, idle I Harness and connector

the engine. I Compression
POWER BAL- I A/C switch “OFF” I Injectors
Engine runs rough or dies.
ANCE I Shift lever “N” I Power transistor
I Cut off each injector signal one I Spark plugs
at a time using CONSULT-II. I Ignition coils

I Ignition switch: ON I Harness and connector

COOLING FAN I Turn the cooling fan “ON” and Cooling fan moves and stops. I Cooling fan motor
“OFF” using CONSULT-II. I Cooling fan relay

I Ignition switch: ON
(Engine stopped)
FUEL PUMP Fuel pump relay makes the operat- I Harness and connector
I Turn the fuel pump relay “ON”
RELAY ing sound. I Fuel pump relay
and “OFF” using CONSULT-II
and listen to operating sound.

I Engine: After warming up, run

engine at 1,500 rpm.
PURG VOL I Change the EVAP canister purge Engine speed changes according I Harness and connector
CONT/V volume control solenoid valve to the opening percent. I Solenoid valve
opening percent using CON-
SULT-II.

I Ignition switch: ON
SWIRL CONT I Turn solenoid valve “ON” and Solenoid valve makes an operating I Harness and connector
SOL VALVE “OFF” with CONSULT-II and lis- sound. I Solenoid valve
ten for operating sound.

I Ignition switch: ON
I Turn solenoid valve “ON” and Solenoid valve makes an operating I Harness and connector
VIAS SOL VALVE
“OFF” with CONSULT-II and lis- sound. I Solenoid valve
ten for operating sound.

I Engine: After warming up, run

engine at idle speed.
I Gear position: “D”’ range Body vibration changes according I Harness and connector
ENGINE MOUNT-
(Vehicle stopped) to the electronic controlled engine I Electronic controlled engine
ING
I Turn electronic controlled engine mount condition. mount
mount “IDLE” and “RAVEL” with
the CONSULT-II.

EC-72
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)
DTC & SRT CONFIRMATION MODE NFEC0699S09
SRT STATUS Mode
For details, refer to “SYSTEM READINESS TEST (SRT) CODE”,
NFEC0699S0901
GI
EC-45.
SRT Work Support Mode NFEC0699S0902
MA
This mode enables a technician to drive a vehicle to set the SRT
while monitoring the SRT status.
EM
DTC Work Support Mode NFEC0699S0903

Test mode Test item Condition Reference page LC

HO2S1 (B1) P0130 EC-148

HO2S1 (B1) P0131 EC-157

HO2S1 (B1) P0132 EC-164

HO2S1 (B1) P0133 EC-171 FE

HO2S1
HO2S1 (B2) P0150 EC-148

HO2S1 (B2) P0151 EC-157 CL

HO2S1 (B2) P0152 Refer to corresponding EC-164
trouble diagnosis for
HO2S1 (B2) P0153 DTC. EC-171 MT
HO2S2 (B1) P0137 EC-198

HO2S2 (B1) P0138 EC-209

AT
HO2S2 (B1) P0139 EC-220
HO2S2 AX
HO2S2 (B2) P0157 EC-198

HO2S2 (B2) P0158 EC-209

SU
HO2S2 (B2) P0159 EC-220

BR

REAL TIME DIAGNOSIS IN DATA MONITOR MODE

(RECORDING VEHICLE DATA) ST
NFEC0699S10
CONSULT-II has two kinds of triggers and they can be selected by
touching “SETTING” in “DATA MONITOR” mode. RS
1) “AUTO TRIG” (Automatic trigger):
I The malfunction will be identified on the CONSULT-II screen in
real time. BT
In other words, DTC/1st trip DTC and malfunction item will be
displayed if the malfunction is detected by ECM.
At the moment a malfunction is detected by ECM, “MONITOR” HA
SEF705Y in “DATA MONITOR” screen is changed to “Recording Data ...
xx%” as shown at left, and the data after the malfunction detec-
tion is recorded. Then when the percentage reached 100%, SC
“REAL-TIME DIAG” screen is displayed. If “STOP” is touched
on the screen during “ Recording Data ... xx%”, “REAL-TIME
DIAG” screen is also displayed. EL
The recording time after the malfunction detection and the
recording speed can be changed by “TRIGGER POINT” and
“Recording Speed”. Refer to CONSULT-II OPERATION IDX
MANUAL.
2) “MANU TRIG” (Manual trigger):
I DTC/1st trip DTC and malfunction item will not be displayed
SEF707X

EC-73
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
CONSULT-II (Cont’d)
automatically on CONSULT-II screen even though a malfunc-
tion is detected by ECM.
DATA MONITOR can be performed continuously even though
a malfunction is detected.
Use these triggers as follows:
1) “AUTO TRIG”
I While trying to detect the DTC/1st trip DTC by performing the
“DTC Confirmation Procedure”, be sure to select to “DATA
MONITOR (AUTO TRIG)” mode. You can confirm the malfunc-
tion at the moment it is detected.
I While narrowing down the possible causes, CONSULT-II
should be set in “DATA MONITOR (AUTO TRIG)” mode, espe-
cially in case the incident is intermittent.
When you are inspecting the circuit by gently shaking (or twist-
ing) the suspicious connectors, components and harness in
the “DTC Confirmation Procedure”, the moment a malfunction
is found the DTC/1st trip DTC will be displayed. (Refer to
GI-22, “Incident Simulation Tests”.
2) “MANU TRIG”
I If the malfunction is displayed as soon as “DATA MONITOR”
is selected, reset CONSULT-II to “MANU TRIG”. By selecting
“MANU TRIG” you can monitor and store the data. The data
can be utilized for further diagnosis, such as a comparison with
the value for the normal operating condition.

SEF720X

EC-74
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Generic Scan Tool (GST)

Generic Scan Tool (GST) =NFEC0700

DESCRIPTION NFEC0700S01
Generic Scan Tool (OBDII scan tool) complying with ISO15031-4
GI
has 8 different functions explained on the next page.
ISO9141 is used as the protocol. MA
The name “GST” or “Generic Scan Tool” is used in this service
manual.
EM

SEF139P LC
GST INSPECTION PROCEDURE NFEC0700S02
1. Turn ignition switch OFF.
2. Connect “GST” to data link connector, which is located under
the driver side dash panel.
FE

CL

SEF036YA
MT
3. Turn ignition switch ON.
4. Enter the program according to instruction on the screen or in AT
the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.) AX

SU

BR
SEF398S

5. Perform each diagnostic mode according to each service pro-

cedure. ST
For further information, see the GST Operation Manual of the
tool maker. RS

BT

HA
SEF416S

SC

EL

IDX

EC-75
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITH EURO-OBD
Generic Scan Tool (GST) (Cont’d)
FUNCTION NFEC0700S03

Diagnostic test mode Function

This mode gains access to current emission-related data values, including analog
MODE 1 READINESS TESTS inputs and outputs, digital inputs and outputs, distance traveled while MIL is activated
and system status information.

This mode gains access to emission-related data value which were stored by ECM
MODE 2 (FREEZE DATA)
during the freeze frame. (For details, refer to “Freeze Frame Data”, EC-44.)

This mode gains access to emission-related power train trouble codes which were
MODE 3 DTCs
stored by ECM.

This mode can clear all emission-related diagnostic information. This includes:
I Clear number of diagnostic trouble codes (MODE 1)
I Clear diagnostic trouble codes (MODE 3)
MODE 4 CLEAR DIAG INFO I Clear trouble code for freeze frame data (MODE 1)
I Clear freeze frame data (MODE 2)
I Reset status of system monitoring test (MODE 1)
I Clear on board monitoring test results (MODE 6 and 7)

This mode accesses the results of on board diagnostic monitoring tests of specific
MODE 6 (ON BOARD TESTS)
components/systems that are not continuously monitored.

This mode enables the off board test drive to obtain test results for emission-related
MODE 7 (ON BOARD TESTS) powertrain components/systems that are continuously monitored during normal driving
conditions.

MODE 8 — This mode is not applicable on this vehicle.

This mode enables the off-board (External test equipment) to request specific vehicle
MODE 9 (CALIBRATION ID)
information such as Vehicle Identification Number (VIN) and Calibration IDs.

EC-76
TROUBLE DIAGNOSIS — INTRODUCTION WITH EURO-OBD
Introduction

Introduction NFEC0701
The engine has an ECM to control major systems such as fuel
control, ignition control, idle air control system, etc. The ECM GI
accepts input signals from sensors and instantly drives actuators.
It is essential that both input and output signals are proper and
stable. At the same time, it is important that there are no problems MA
such as vacuum leaks, fouled spark plugs, or other problems with
the engine.
It is much more difficult to diagnose a problem that occurs intermit- EM
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this
MEF036D
case, careful checking of suspected circuits may help prevent the LC
replacement of good parts.
A visual check only may not find the cause of the problems. A road
test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the “Work Flow” on EC-79.
Before undertaking actual checks, take a few minutes to talk with FE
a customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such problems, espe-
cially intermittent ones. Find out what symptoms are present and CL
under what conditions they occur. A “Diagnostic Worksheet” like the
example on next page should be used.
Start your diagnosis by looking for “conventional” problems first. MT
SEF233G
This will help troubleshoot driveability problems on an electronically
controlled engine vehicle.
AT

AX

SU

BR
SEF234G

DIAGNOSTIC WORKSHEET NFEC0701S01

There are many operating conditions that lead to the malfunction
ST
of engine components. A good grasp of such conditions can make
trouble-shooting faster and more accurate. RS
In general, each customer feels differently about a problem. It is
important to fully understand the symptoms or conditions for a
customer complaint. BT
Utilize a diagnostic worksheet like the one on the next page in order
to organize all the information for troubleshooting.
HA
SEF907L

SC

EL

IDX

EC-77
 TROUBLE DIAGNOSIS — INTRODUCTION WITH EURO-OBD
Introduction (Cont’d)
Worksheet Sample NFEC0701S0101

MTBL0311

EC-78
 TROUBLE DIAGNOSIS — INTRODUCTION WITH EURO-OBD
Work Flow

Work Flow NFEC0702

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

SEF510ZG
HA
*1 EC-95 *4 If the on board diagnostic system detected, perform “TROUBLE
*2 If time data of “SELF-DIAG cannot be performed, check main DIAGNOSIS FOR INTERMIT-
RESULTS” is other than “0” or power supply and ground circuit. TENT INCIDENT”, EC-117. SC
“[1t]”, perform “TROUBLE DIAG- Refer to “TROUBLE DIAGNOSIS *6 EC-50
NOSIS FOR INTERMITTENT FOR POWER SUPPLY”, EC-118. *7 EC-113
INCIDENT”, EC-117. *5 If malfunctioning part cannot be EL
*3 If the incident cannot be verified,
perform “TROUBLE DIAGNOSIS
FOR INTERMITTENT INCIDENT”, IDX
EC-117.

EC-79
 TROUBLE DIAGNOSIS — INTRODUCTION WITH EURO-OBD
Work Flow (Cont’d)
DESCRIPTION FOR WORK FLOW NFEC0702S01

STEP DESCRIPTION

Get detailed information about the conditions and the environment when the incident/symptom occurred using
STEP I
the “DIAGNOSTIC WORK SHEET”, EC-77.

Before confirming the concern, check and write down (print out using CONSULT-II or GST) the (1st trip) DTC
and the (1st trip) freeze frame data, then erase the DTC and the data. (Refer to EC-55.) The (1st trip) DTC and
the (1st trip) freeze frame data can be used when duplicating the incident at STEP III & IV.
STEP II If the incident cannot be verified, perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
Study the relationship between the cause, specified by (1st trip) DTC, and the symptom described by the cus-
tomer. (The “Symptom Matrix Chart” will be useful. See EC-96.)
Also check related service bulletins for information.

Try to confirm the symptom and under what conditions the incident occurs.
The “DIAGNOSTIC WORK SHEET” and the freeze frame data are useful to verify the incident. Connect CON-
STEP III SULT-II to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results.
If the incident cannot be verified, perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
If the malfunction code is detected, skip STEP IV and perform STEP V.

Try to detect the (1st trip) DTC by driving in (or performing) the “DTC Confirmation Procedure”. Check and read
the (1st trip) DTC and (1st trip) freeze frame data by using CONSULT-II or GST.
During the (1st trip) DTC verification, be sure to connect CONSULT-II to the vehicle in DATA MONITOR (AUTO
TRIG) mode and check real time diagnosis results.
STEP IV
If the incident cannot be verified, perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
In case the “DTC Confirmation Procedure” is not available, perform the “Overall Function Check” instead. The
(1st trip) DTC cannot be displayed by this check, however, this simplified “check” is an effective alternative.
The “NG” result of the “Overall Function Check” is the same as the (1st trip) DTC detection.

Take the appropriate action based on the results of STEP I through IV.
If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC PXXXX.
If the normal code is indicated, proceed refer to “Basic Inspection”, EC-81. If CONSULT-II is available, perform
STEP V
“DATA MONITOR (SPEC)” mode with CONSULT-II and proceed to the “TROUBLE DIAGNOSIS — SPECIFICA-
TION VALUE”. (Refer to EC-113.) (If malfunction is detected, proceed to “REPAIR/REPLACE”.) Then perform
inspections according to the Symptom Matrix Chart. (Refer to EC-96.)

Identify where to begin diagnosis based on the relationship study between symptom and possible causes.
Inspect the system for mechanical binding, loose connectors or wiring damage using (tracing) “Harness Layouts”.
Gently shake the related connectors, components or wiring harness with CONSULT-II set in “DATA MONITOR
(AUTO TRIG)” mode.
Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CON-
SULT-II. Refer to EC-100, EC-105.
STEP VI
The “Diagnostic Procedure” in EC section contains a description based on open circuit inspection. A short circuit
inspection is also required for the circuit check in the Diagnostic Procedure. For details, refer to GI-24, “Circuit
Inspection”.
Repair or replace the malfunction parts.
If malfunctioning part cannot be detected, perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”,
EC-117.

Once you have repaired the circuit or replaced a component, you need to run the engine in the same conditions
and circumstances which resulted in the customer’s initial complaint.
Perform the “DTC Confirmation Procedure” and confirm the normal code [DTC No. P0000] is detected. If the
STEP VII
incident is still detected in the final check, perform STEP VI by using a different method from the previous one.
Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) (1st trip) DTC in
ECM and TCM (Transmission control module). (Refer to EC-55.)

EC-80
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection

Basic Inspection NFEC0703

Precaution:
Perform Basic Inspection without electrical or mechanical loads applied; GI
I Headlamp switch is OFF,
I Air conditioner switch is OFF, MA
I Rear window defogger switch is OFF,
I Steering wheel is in the straight-ahead position, etc.
On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light only EM
small lamps.
1 INSPECTION START LC
1. Check service records for any recent repairs that may indicate a related problem, or a current need for scheduled
maintenance.
2. Open engine hood and check the following:
I Harness connectors for improper connections
I Vacuum hoses for splits, kinks and improper connections
I Wiring for improper connections, pinches and cuts FE
I Air cleaner clogging
I Hoses and ducts for leaks
CL

MT

AT

SEF983U
AX

© GO TO 2. SU

2 CHECK THROTTLE DRUM OPERATION

BR
Confirm that throttle drum is in contact with the stopper.

ST

RS

BT

HA
SEC016C

OK or NG
SC
OK (With CONSULT-II) © GO TO 5.
OK (Without CONSULT- © GO TO 9.
II) EL
NG © GO TO 3.
IDX

EC-81
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

3 CHECK ACCELERATOR WIRE INSTALLATION

Check accelerator wire for slack.
OK or NG
OK © GO TO 4.
NG © Adjust accelerator wire. Refer to FE-3, “Adjusting Accelerator Wire”.

4 CHECK THROTTLE VALVE OPERATION

1. Remove intake air ducts.
2. Check throttle valve operation when moving throttle drum by hand.
OK or NG
OK © Retighten the throttle drum fixing nuts.
NG © Clean the throttle body and throttle valve.

5 CHECK THROTTLE POSITION SWITCH CLOSED POSITION

With CONSULT-II
1. Turn ignition switch “ON”.
2. Select ”CLSD THL/P SW” in “DATA MONITOR” mode with CONSULT-II.
3. Read “CLSD THL/P SW” signal under the following conditions.
I Insert a 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between stopper and throttle drum as
shown in the figure and check the signal.

SEC017C

SEF173Y
“CLSD THL/P SW” signal should remain “ON” while inserting 0.05 mm (0.0020 in) feeler gauge.
“CLSD THL/P SW” signal should remain “OFF” while inserting 0.15 mm (0.0059 in) feeler gauge.
OK or NG
OK © GO TO 8.
NG © GO TO 6.

EC-82
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

6 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I

With CONSULT-II GI
1. Loosen throttle position sensor fixing bolts.
2. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.
MA

EM

LC

SEC017C
3. Turn throttle position sensor body counterclockwise until “CLSD THL/P SW” signal switches to “OFF”. FE

CL

MT

AT

SEC018C
AX

SU

BR

ST

SEF305Y RS
© GO TO 7.
BT

HA

SC

EL

IDX

EC-83
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

7 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II

With CONSULT-II
1. Temporarily tighten sensor body fixing bolts as follows.
I Gradually move the sensor body clockwise and stop it when “CLSD THL/P SW” signal switches from “OFF” to
“ON”, then temporarily tighten sensor body fixing bolts.

SEC018C
2. Make sure two or three times that the signal is “ON” when the throttle valve is closed and “OFF” when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the signal remains “OFF” when the throttle valve is closed.
5. Tighten throttle position sensor.
6. Check the “CLSD THL/P SW” signal again.
The signal remains “OFF” while closing throttle valve.
OK or NG
OK © GO TO 8.
NG © GO TO 6.

EC-84
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

8 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY

With CONSULT-II GI
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly. MA
1. Remove feeler gauge.
2. Start engine.
3. Warm up engine to normal operating temperature.
4. Select “CLSD THL POS” in “DATA MONITOR” mode.
EM
5. Stop engine. (Turn ignition switch “OFF”.)
6. Turn ignition switch “ON” and wait at least 5 seconds.
LC

FE

CL

SEF864V
MT
7. Turn ignition switch “OFF” and wait at least 10 seconds.
8. Repeat steps 6 and 7 until “CLSD THL POS” signal changes to “ON”.
AT

AX

SU

BR
SEF061Y

ST
© GO TO 13.

RS

BT

HA

SC

EL

IDX

EC-85
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

9 CHECK THROTTLE POSITION SWITCH CLOSED POSITION

Without CONSULT-II
1. Disconnect closed throttle position switch harness connector.
2. Check continuity between closed throttle position switch terminals 4 and 5 under the following conditions.

SEF711X
I Insert the 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between the stopper and throttle drum
as shown in the figure.

SEC017C
“Continuity should exist” while inserting 0.05 mm (0.0020 in) feeler gauge.
“Continuity should not exist” while inserting 0.15 mm (0.0059 in) feeler gauge.
OK or NG
OK © GO TO 12.
NG © GO TO 10.

EC-86
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

10 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I

Without CONSULT-II GI
1. Loosen throttle position sensor fixing bolts.
2. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.
MA

EM

LC

SEC017C
3. Turn throttle position sensor body counterclockwise until continuity does not exist. FE

CL

MT

AT

SEF711X
AX

SU

BR

ST

SEC018C
RS
© GO TO 11.
BT

HA

SC

EL

IDX

EC-87
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

11 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II

Without CONSULT-II
1. Temporarily tighten sensor body fixing bolts as follows.
I Gradually move the sensor body clockwise and stop it when the continuity comes to exist, then temporarily
tighten sensor body fixing bolts.

SEC018C
2. Make sure two or three times that the continuity exists when the throttle valve is closed and continuity does not exist
when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the continuity does not exist when the throttle valve is closed.
5. Tighten throttle position sensor.
6. Check the continuity again.
Continuity does not exist while closing the throttle valve.
OK or NG
OK © GO TO 12.
NG © GO TO 10.

12 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY

Without CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Remove feeler gauge.
2. Reconnect throttle position switch harness connector.
3. Start engine.
4. Warm up engine to normal operating temperature.
5. Stop engine. (Turn ignition switch “OFF”.)
6. Turn ignition switch “ON” and wait at least 5 seconds.

SEF864V
7. Turn ignition switch “OFF” and wait at least 10 seconds.
8. Repeat steps 6 and 7, 20 times.
© GO TO 13.

EC-88
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

13 CHECK (1ST TRIP) DTC

1. Turn ignition switch “OFF”. GI
2. Release vacuum from throttle opener.
3. Remove vacuum pump and vacuum hose from throttle opener.
4. Reinstall original vacuum hose to throttle opener securely. MA
5. Start engine and warm it up to normal operating temperature.
6. Rev (2,000 to 3,000 rpm) two or three times.
7. Make sure no (1st trip) DTC is displayed with CONSULT-II or GST.
EM
OK or NG
OK © GO TO 15.
LC
NG © GO TO 14.

14 REPAIR MALFUNCTION
Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.
© GO TO 13.
FE

15 CHECK TARGET IDLE SPEED CL

With CONSULT-II
1. Start engine and warm it up to normal operating temperature. MT
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
700±50 rpm (in “P” or “N” position)
AT
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature. AX
2. Check idle speed.
700±50 rpm (in “P” or “N” position)
OK or NG SU
OK © GO TO 25.
NG © GO TO 16. BR

16 PERFORM IDLE AIR VOLUME LEARNING ST

Refer to “Idle Air Volume Learning”, EC-41.
Which is the result CMPLT or INCMP?
RS
CMPLT or INCMP
CMPLT © GO TO 17.
BT
INCMP © 1. Follow the construction of “Idle Air Volume Leaning”.
2. GO TO 16.
HA

SC

EL

IDX

EC-89
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

17 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
700±50 rpm (in “P” or “N” position)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 23.
NG (Models with Euro- © GO TO 19.
OBD system)
NG (Models without © GO TO 18.
Euro-OBD system)

18 CHECK IACV-AAC VALVE CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Check IACV-AAC valve circuit for open and short. Refer to “Diagnostic Procedure”, EC-313.
OK or NG
OK © GO TO 19.
NG © 1. Repair or replace.
2. GO TO 20.

19 REPLACE IACV-AAC VALVE

Replace IACV-AAC valve.
© GO TO 20.

20 PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-41.
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT © GO TO 21.
INCMP © 1. Follow the construction of “Idle Air Volume Learning”.
2. GO TO 16.

EC-90
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

21 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed. MA
700±50 rpm (in “P” or “N” position)

Without CONSULT-II EM
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
700±50 rpm (in “P” or “N” position) LC
OK or NG
OK © GO TO 23.
NG © GO TO 22.

FE
22 CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely
the case.)
CL
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to “NVIS (NISSAN
VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-56.
MT
© GO TO 16.

23 CHECK IGNITION TIMING

AT
1. Start engine and warm it up to normal operating temperature.
2. Check ignition timing at idle using a timing light. AX

SU

BR

ST

SEF572X RS
Ignition timing:
15°±5° BTDC (in “P” or “N” position) (VQ30DE engine)
9°±5° BTDC (in “P” or “N” position) (VQ20DE engine) BT
OK or NG
OK © GO TO 31. HA
NG © GO TO 24.

SC
24 CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-31, “Installation”.
EL
OK or NG
OK © GO TO 22.
IDX
NG © 1. Repair the timing chain installation.
2. GO TO 16.

EC-91
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

25 CHECK IGNITION TIMING

1. Start engine and let it idle.
2. Check ignition timing at idle using a timing light.

SEF572X
Ignition timing:
15°±5° BTDC (in “P” or “N” position) (VQ30DE engine)
9°±5° BTDC (in “P” or “N” position) (VQ20DE engine)
OK or NG
OK © GO TO 31.
NG © GO TO 26.

26 PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-41.
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT © GO TO 27.
INCMP © 1. Follow the construction of “Idle Air volume Learning”.
2. GO TO 26.

27 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
700±50 rpm (in “P” or “N” position)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 29.
NG © GO TO 28.

28 CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function.
(ECM may be the cause of a problem, but this is rarely the case.)
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to “NVIS (NISSAN
VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-56.
© GO TO 26.

EC-92
 TROUBLE DIAGNOSIS — BASIC INSPECTION WITH EURO-OBD
Basic Inspection (Cont’d)

29 CHECK IGNITION TIMING AGAIN

Check ignition timing again. Refer to Test No. 25. GI
OK or NG
OK © GO TO 31. MA
NG © GO TO 30.

EM
30 CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-31, “Installation”.
LC
OK or NG
OK © GO TO 28.
NG © 1. Repair the timing chain installation.
2. GO TO 26.
FE
31 ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC No. might be displayed. CL
Erase the stored memory in ECM and TCM (Transmission control module).
Refer to “How to Erase Emission-Related Diagnostic Information”, EC-55 and AT-374, “HOW TO ERASE DTC”.
© INSPECTION END MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-93
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
DTC Inspection Priority Chart

DTC Inspection Priority Chart NFEC0704

If some DTCs are displayed at the same time, perform inspections one by one based on the following prior-
ity chart.
Priority Detected items (DTC)

1 I P0100 Mass air flow sensor

I P0110 Intake air temperature sensor
I P0115 Engine coolant temperature sensor
I P0120 Throttle position sensor
I P0180 Fuel tank temperature sensor
I P0325 Knock sensor
I P0335 P1336 Crankshaft position sensor (POS)
I P0340 Camshaft position sensor (PHASE)
I P0500 Vehicle speed sensor
I P0605 ECM
I P1320 Ignition signal
I P1335 Crankshaft position sensor (REF)
I P1605 A/T diagnosis communication line
I P1706 Park/Neutral position (PNP) switch

2 I P0130-P0134, P0150-P0154 Heated oxygen sensor 1 (front)

I P0135 P0155 Heated oxygen sensor 1 heater (front)
I P0137-P0140, P0157-P0160 Heated oxygen sensor 2 (rear)
I P0141 P0161 Heated oxygen sensor 2 heater (rear)
I P0443 EVAP canister purge volume control solenoid valve
I P0510 Closed throttle position switch
I P0705-P0755 P1705 P1760 A/T related sensors, solenoid valves and switches

3 I P0171 P0172 P0174 P0175 Fuel injection system function

I P0306 - P0300 Misfire
I P0420 P0430 Three way catalyst function
I P0505 IACV-AAC valve
I P0731-P0734 A/T function
I P1131 Swirl control valve control solenoid valve

EC-94
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
Fail-safe Chart

Fail-safe Chart =NFEC0705

The ECM enters fail-safe mode, if any of the following malfunctions is detected due to the open or short cir-
cuit. When the ECM enters the fail-safe mode of ECM, the MIL illuminates. GI
DTC No. Detected items Engine operating condition in fail-safe mode

P0100 Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
MA
P0115 Engine coolant temperature Engine coolant temperature will be determined by ECM based on the time after
sensor circuit turning ignition switch “ON” or “START”. EM
CONSULT-II displays the engine coolant temperature decided by ECM.

Engine coolant temperature decided

Condition
(CONSULT-II display)
LC
Just as ignition switch is turned
40°C (104°F)
ON or Start

More than approx. 4 minutes

80°C (176°F)
after ignition ON or Start
FE
40 - 80°C (104 - 176°F)
Except as shown above
(Depends on the time)

P0120 Throttle position sensor cir- Throttle position will be determined based on the injected fuel amount and the
CL
cuit engine speed.
Therefore, acceleration will be poor.
MT
Condition Driving condition

When engine is idling Normal

AT
When accelerating Poor acceleration

P1335 Crankshaft position sensor Compression TDC signal (120° signal) is controlled by camshaft position sensor AX
(REF) circuit (PHASE) signal and crankshaft position sensor (POS) signal. Ignition timing will be
delayed 0° to 2°.

Unable to ECM ECM fail-safe activating condition SU

access ECM The computing function of the ECM was judged to be malfunctioning.
When the fail-safe system activates (i.e., if the ECM detects a malfunction condi-
tion in the CPU of ECM), the MIL on the instrument panel lights to warn the driver. BR
However it is not possible to access ECM and DTC cannot be confirmed.
Engine control with fail-safe
When ECM fail-safe is operating, fuel injection, ignition timing, fuel pump operation, ST
IACV-AAC valve operation and cooling fan operation are controlled under certain
limitations.

ECM fail-safe operation RS

Engine speed will not rise more than 3,000
Engine speed
rpm BT
Fuel injection Simultaneous multiport fuel injection system

Ignition timing Ignition timing is fixed at the preset valve HA

Fuel pump relay is “ON” when engine is running
Fuel pump
and “OFF” when engine stalls
SC
IACV-AAC valve Full open

Cooling fan relay “ON” (High speed condition)

Cooling fans when engine is running, and “OFF” when engine
EL
stalls.

Replace ECM, if ECM fail-safe condition is confirmed. IDX

EC-95
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
Symptom Matrix Chart

Symptom Matrix Chart NFEC0706

SYSTEM — BASIC ENGINE CONTROL SYSTEM NFEC0706S01

SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
page

IDLING VIBRATION
ENGINE STALL

Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

Fuel Fuel pump circuit 1 1 2 3 2 2 2 3 2 EC-427

Fuel pressure regulator system 3 3 4 4 4 4 4 4 4 4 EC-37

Injector circuit 1 1 2 3 2 2 2 2 EC-417

Evaporative emission system EC-32

Air Positive crankcase ventilation sys- 4 4 4 4 4 4 4 4

3 3 1 EC-35
tem

Incorrect idle speed adjustment 1 1 1 1 1 EC-81

IACV-AAC valve circuit 1 1 2 3 3 2 2 2 2 2 2 EC-309

Ignition Incorrect ignition timing adjustment 3 3 1 1 1 1 1 1 EC-81

Ignition circuit 1 1 2 2 2 2 2 EC-353

Main power supply and ground circuit 2 EC-118

2 2 3 3 3 3 3 3
Air conditioner circuit 3 3 2 HA section

1 - 6: The numbers refer to the order of inspection.

(continued on next page)

EC-96
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
Symptom Matrix Chart (Cont’d)

SYMPTOM

GI

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)
MA

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

EM
Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
page

IDLING VIBRATION
LC

ENGINE STALL
FE
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

Engine Crankshaft position sensor (REF)

EC-364
CL
control circuit
2 2
Crankshaft position sensor (POS)
circuit
EC-280, 370 MT
Camshaft position sensor (PHASE)
3 EC-288
circuit AT
Mass air flow sensor circuit 1 2 EC-125

Heated oxygen sensor 1 (front)

EC-148
AX
circuit
1 2 3 2 2 2 2
Engine coolant temperature sensor
circuit
1 3 3 EC-136 SU
Throttle position sensor circuit 2 2 EC-141
BR
Incorrect throttle position sensor
3 1 1 1 1 1 1 1 EC-81
adjustment

Vehicle speed sensor circuit 2 3 3 EC-305 ST

Knock sensor circuit 2 3 EC-275

ECM 2 2 3 3 3 3 3 3 3 3 EC-95, 326 RS

Start signal circuit 2 EC-423

Park/Neutral position switch circuit 3 3 3 EC-381

BT
Power steering oil pressure switch
2 EC-437
circuit HA
3 3
Electronic controlled engine mount
EC-433
control circuit
SC
Electrical load signal circuit EC-446

1 - 6: The numbers refer to the order of inspection. EL

(continued on next page)

IDX

EC-97
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
Symptom Matrix Chart (Cont’d)
SYSTEM — ENGINE MECHANICAL & OTHER NFEC0706S02

SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
section

IDLING VIBRATION
ENGINE STALL
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

Fuel Fuel tank FE section

5
Fuel piping 5 5 5 5 5 5

Vapor lock
5
Valve deposit

Poor fuel (Heavy weight gasoline, 5 5 5 5 5 5 5

Low octane)
—
Air Air duct

Air cleaner

Air leakage from air duct

(Mass air flow sensor — throttle
5 5 5 5 5 5
body)
5 5 5 5
Throttle body, Throttle wire FE section

Air leakage from intake manifold/

—
Collector/Gasket

Cranking Battery
1 1 1 1 1 1 1 1
Alternator circuit EL section

Starter circuit 3

Flywheel/Drive plate 6 EM section

PNP switch 4 AT section

1 - 6: The numbers refer to the order of inspection.

(continued on next page)

EC-98
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
Symptom Matrix Chart (Cont’d)

SYMPTOM

GI

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)
MA

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

EM
Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
section

IDLING VIBRATION
LC

ENGINE STALL
FE
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

Engine Cylinder head CL

5 5 5 5 5 5 5 5
Cylinder head gasket 4 3

Cylinder block MT
Piston 4

Piston ring AT
6 6 6 6 6 6 6 6
Connecting rod
EM section AX
Bearing

Crankshaft
SU
Valve Timing chain
mechanism
Camshaft
5 5 5 5 5 5 5 5 BR
Intake valve
3
Exhaust valve
ST
Exhaust Exhaust manifold/Tube/Muffler/
Gasket 5 5 5 5 5 5 5 5 FE section
Three way catalyst
RS
Lubrication Oil pan/Oil strainer/Oil pump/Oil MA, EM, LC
filter/Oil gallery 5 5 5 5 5 5 5 5 section BT
Oil level (Low)/Filthy oil LC section

Cooling Radiator/Hose/Radiator filler cap HA

Thermostat 5

Water pump SC
Water gallery 5 5 5 5 5 5 5 4 5

Cooling fan 5 EC section

EL
Coolant level (low)/Contaminated
MA section
coolant IDX
1 - 6: The numbers refer to the order of inspection.

EC-99
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
Symptom Matrix Chart (Cont’d)

SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
section

IDLING VIBRATION
ENGINE STALL
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

NVIS (NISSAN Vehicle Immobilizer System — EC-56 or EL

1 1
NATS) section

1 - 6: The numbers refer to the order of inspection.

CONSULT-II Reference Value in Data Monitor

Mode NFEC0707
Remarks:
I Specification data are reference values.
I Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in
spite of the ignition timing not being adjusted to the specification data. This IGN TIMING monitors the data calculated by the ECM
according to the signals input from the camshaft position sensor and other ignition timing related sensors.
I If the real-time diagnosis results are NG and the on board diagnostic system results are OK when diagnosing the mass air flow sensor,
first check to see if the fuel pump control circuit is normal.

MONITOR ITEM CONDITION SPECIFICATION

I Tachometer: Connect
ENG SPEED Almost the same speed as
I Run engine and compare tachometer indication with the CONSULT-II
CKPS·RPM (POS) the CONSULT-II value.
value.

POS COUNT I Engine: Running 179 - 181

I Engine: After warming up Idle 1.2 - 1.8V

I Air conditioner switch: “OFF”
MAS A/F SE-B1
I Shift lever: “N”
I No-load 2,500 rpm 1.6 - 2.2V

COOLAN TEMP/S I Engine: After warming up More than 70°C (158°F)

HO2S1 (B1) 0 - 0.3V +, Approx. 0.6 -

HO2S1 (B2) 1.0V
Maintaining engine speed at 2,000
I Engine: After warming up LEAN +, RICH
HO2S1 MNTR (B1) rpm
Changes more than 5 times
HO2S1 MNTR (B2)
during 10 seconds.

HO2S2 (B1) 0 - 0.3V +, Approx. 0.6 -

HO2S2 (B2) Maintaining engine speed at 2,000 1.0V
I Engine: After warming up
HO2S2 MNTR (B1) rpm
LEAN +, RICH
HO2S2 MNTR (B2)

EC-100
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
CONSULT-II Reference Value in Data Monitor Mode (Cont’d)

MONITOR ITEM CONDITION SPECIFICATION

VHCL SPEED SE
I Turn drive wheels and compare speedometer indication with the CON- Almost the same speed as GI
SULT-II value the CONSULT-II value

BATTERY VOLT I Ignition switch: ON (Engine stopped) 11 - 14V

MA
I Engine: After warming up, idle
Throttle valve: fully closed 0.15 - 0.85V
the engine
THRTL POS SEN I Engine: After warming up
EM
I Ignition switch: ON Throttle valve: fully opened 3.5 - 4.7V
(Engine stopped)
LC
START SIGNAL I Ignition switch: ON , START , ON OFF , ON , OFF

CLSD THL/P SW I Engine: After warming up, idle Throttle valve: Idle position ON
CLSD THL POS the engine Throttle valve: Slightly open OFF

Air conditioner switch: “OFF” OFF FE

I Engine: After warming up, idle
AIR COND SIG Air conditioner switch: “ON”
the engine ON
(Compressor operates.)
CL
Shift lever: “P” or “N” ON
P/N POSI SW I Ignition switch: ON
Except above OFF
MT
Steering wheel in neutral position
I Engine: After warming up, idle OFF
PW/ST SIGNAL (forward direction)
the engine
The steering wheel is turned ON
AT
I Ignition switch: ON Below 19°C (66°F) OFF
AMB TEMP SW I Compare ambient air tempera- AX
ture with the following: Above 25°C (77°F) ON

IGNITION SW I Ignition switch: ON , OFF , ON ON , OFF , ON

SU
I Engine: After warming up Idle 2.4 - 3.2 msec
INJ PULSE-B2 I Air conditioner switch: “OFF”
INJ PULSE-B1 I Shift lever: “N” BR
I No-load 2,000 rpm 1.9 - 2.8 msec

I Engine: After warming up Idle 2.0 - 3.2 msec

I Air conditioner switch: “OFF” ST
B/FUEL SCHDL
I Shift lever: “N”
I No-load 2,000 rpm 1.4 - 2.6 msec
RS
I Engine: After warming up 9°±5° BTDC (VQ20DE)
Idle
I Air conditioner switch: “OFF” 15°±5° BTDC (VQ30DE)
IGN TIMING
I Shift lever: “N”
I No-load 2,000 rpm More than 25° BTDC
BT
I Engine: After warming up Idle 2 - 10 step
IACV-AAC/V
I Air conditioner switch: “OFF” HA
I Shift lever: “N”
I No-load 2,000 rpm —

I Engine: After warming up

SC
Idle 0%
I Air conditioner switch: “OFF”
PURG VOL C/V
I Shift lever: “N”
I No-load 2,000 rpm — EL
A/F ALPHA-B2 Maintaining engine speed at 2,000
I Engine: After warming up 54 - 155%
A/F ALPHA-B1 rpm IDX
AIR COND RLY I Air conditioner switch: OFF , ON OFF , ON

EC-101
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
CONSULT-II Reference Value in Data Monitor Mode (Cont’d)

MONITOR ITEM CONDITION SPECIFICATION

I Ignition switch is turned to ON (Operates for 5 seconds)

ON
FUEL PUMP RLY I Engine running and cranking

Except as shown above OFF

Engine coolant temperature is 94°C

OFF
(201°F) or less

I After warming up engine, idle Engine coolant temperature is

COOLING FAN the engine. between 95°C (203°F) and 104°C Low
I Air conditioner switch: “OFF” (219°F)

Engine coolant temperature is 105°C

HIGH
(221°F) or more

HO2S1 HTR (B1) I Engine speed: Below 3,600 rpm ON

HO2S1 HTR (B2) I Engine speed: Above 3,600 rpm OFF

I Ignition switch: ON (Engine stopped)

OFF
HO2S2 HTR (B1) I Engine speed: Above 3,600 rpm
HO2S2 HTR (B2) I Engine speed: Below 3,600 rpm [After driving for 2 minutes at a speed
ON
of 70 km/h (43 MPH) or more]

I Engine: After warming up Idle 14.0 - 33.0%

I Air conditioner switch: “OFF”
CAL/LD VALUE
I Shift lever: “N”
I No-load 2,500 rpm 12.0 - 25.0%

I Engine: After warming up Throttle valve: fully closed 0.0%

ABSOL TH·P/S I Engine: After warming up

I Ignition switch: ON Throttle valve: fully opened Approx. 80%
(Engine stopped)

I Engine: After warming up Idle 2.0 - 6.0 g·m/s

I Air conditioner switch: “OFF”
MASS AIRFLOW
I Shift lever: “N”
I No-load 2,500 rpm 7.0 - 20.0 g·m/s

ABSOL PRES/SE I Ignition switch: ON Approx. 4.4V

Engine coolant temperature is

between 15°C (59°F) to 50°C ON
SWRL CONT S/V I Engine speed: Idle (122°F).

Engine coolant temperature is above

OFF
50°C (122°F).

Idle “IDLE”
ENGINE MOUNT I Engine: Running
2,000 rpm “TRVL”

Major Sensor Reference Graph in Data Monitor

Mode NFEC0708
The following are the major sensor reference graphs in “DATA MONITOR” mode.
THRTL POS SEN, ABSOL TH·P/S, CLSD THL POS NFEC0708S01
Below is the data for “THRTL POS SEN”, “ABSOL TH·P/S” and “CLSD THL POS” when depressing the accel-
erator pedal with the ignition switch “ON”.
The signal of “THRTL POS SEN” and “ABSOL TH·P/S” should rise gradually without any intermittent drop or
rise after “CLSD THL POS” is changed from “ON” to “OFF”.

EC-102
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
Major Sensor Reference Graph in Data Monitor Mode (Cont’d)

GI

MA

EM

SEF306Y
LC
ENG SPEED, MAS A/F SE-B1, THRTL POS SEN, HO2S2 (B1), HO2S1 (B1), INJ PULSE-B1
NFEC0708S02
Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL POS SEN”, “HO2S2 (B1)”, “HO2S1 (B1)” and
“INJ PULSE-B1” when revving engine quickly up to 4,800 rpm under no load after warming up engine suffi-
ciently.
Each value is for reference, the exact value may vary. FE

CL

MT

AT

AX

SU

BR

SEF241Y ST

RS

BT

HA

SC

EL

IDX

EC-103
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
Major Sensor Reference Graph in Data Monitor Mode (Cont’d)

SEF242YC

EC-104
TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
ECM Terminals and Reference Value

ECM Terminals and Reference Value NFEC0709

PREPARATION
1.
NFEC0709S01
ECM is located behind the instrument lower cover. For this
GI
inspection, remove instrument lower cover.
2. Remove ECM harness protector. MA

EM

SEF038YA LC
3. Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily.
I Open harness securing clip to make testing easier.
I Use extreme care not to touch 2 pins at one time.
I Data is for comparison and may not be exact. FE

CL

MEC486B
MT
ECM HARNESS CONNECTOR TERMINAL LAYOUTNFEC0709S02
AT

AX

SU

BR
SEF970W

ST
ECM INSPECTION TABLE NFEC0709S03
Specification data are reference values and are measured between
each terminal and ground. RS
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
BT
transistor. Use a ground other than ECM terminals, such as
the ground. HA

SC

EL

IDX

EC-105
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
I Idle speed

EVAP canister purge SEF994U

1 PU/R volume control sole-
noid valve BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
I Engine speed is about 2,000 rpm (More than 100
seconds after starting engine).

SEF995U

[Engine is running]
0 - 1.0V
Heated oxygen sensor I Engine speed is below 3,600 rpm.
2 R/L 1 heater (front) (bank
2) [Engine is running] BATTERY VOLTAGE
I Engine speed is above 3,600 rpm. (11 - 14V)

[Engine is running]
0 - 1.0V
Heated oxygen sensor I Engine speed is below 3,600 rpm.
3 OR/L 1 heater (front) (bank
1) [Engine is running] BATTERY VOLTAGE
I Engine speed is above 3,600 rpm. (11 - 14V)

[Engine is running]
I Engine speed is below 3,600 rpm.
0 - 1.0V
I After driving for 2 minutes at a speed of 70 km/h
Heated oxygen sensor (43 MPH) or more.
4 R/L 2 heater (rear) (bank
2) [Ignition switch “ON”]
I Engine stopped BATTERY VOLTAGE
[Engine is running] (11 - 14V)
I Engine speed is above 3,600 rpm.

[Engine is running]
I Engine speed is below 3,600 rpm.
0 - 1.0V
I After driving for 2 minutes at a speed of 70 km/h
Heated oxygen sensor (43 MPH) or more.
5 P/B 2 heater (rear) (bank
1) [Ignition switch “ON”]
I Engine stopped BATTERY VOLTAGE
[Engine is running] (11 - 14V)
I Engine speed is above 3,600 rpm.

6 W/PU
7 Y/B [Engine is running]
IACV-AAC valve 0.1 - 14V
8 Y I Idle speed
17 GY/L

[Engine is running] BATTERY VOLTAGE

VIAS control solenoid I Idle speed (11 - 14V)
16 Y/G
valve [Engine is running]
0 - 1.0V
I Engine speed is above 5,000 rpm.

EC-106
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
NO.
COLOR GI
0 - 0.2V★
MA
[Engine is running]
I Warm-up condition
I Idle speed
EM
21 Y/R Ignition signal No. 1
22 G/R Ignition signal No. 2 LC
SEF399T
23 L/R Ignition signal No. 3
30 GY Ignition signal No. 4 0.1 - 0.3V★
31 PU/W Ignition signal No. 5
32 GY/R Ignition signal No. 6
[Engine is running]
I Warm-up condition
I Engine speed is 2,500 rpm.
FE

SEF645T CL
9 - 11V★
MT
[Engine is running]
I Warm-up condition AT
I Idle speed

SEF579X
AX
25 W/G Tachometer
9 - 11V★
SU
[Engine is running]
I Warm-up condition BR
I Engine speed is 2,500 rpm.

SEF580X
ST
[Engine is running]
[Ignition switch “OFF”]
0 - 1.5V
RS
I For a few seconds after turning ignition switch
ECM relay “OFF”
26 W/B
(Self shutt-off) BT
[Ignition switch “OFF”]
BATTERY VOLTAGE
I A few seconds passed after turning ignition
(11 - 14V)
switch “OFF”
HA
[Engine is running]
I Both A/C switch and blower switch are “ON” 0 - 1.0V
27 B/R Air conditioner relay (Compressor is operating). SC
[Engine is running] BATTERY VOLTAGE
I A/C switch is “OFF”. (11 - 14V)
EL
[Ignition switch “ON”]
I For 1 second after turning ignition switch “ON” 0 - 1.5V
[Engine is running] IDX
28 B/P Fuel pump relay
[Ignition switch “ON”]
BATTERY VOLTAGE
I 1 second passed after turning ignition switch
(11 - 14V)
“ON”.

EC-107
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

[Engine is running]
I Idle speed
0 - 1.0V
I Engine coolant temperature is between 15 to
Swirl control valve con- 50°C (59 to 122°F).
29 G
trol solenoid valve [Engine is running]
I Idle speed BATTERY VOLTAGE
I Engine coolant temperature is above 50°C (11 - 14V)
(122°F).

[Engine is running]
0 - 1.0V
Cooling fan relay I Cooling fan is operating at high speed.
34 LG
(High) [Engine is running] BATTERY VOLTAGE
I Cooling fan is not operating. (11 - 14V)

[Engine is running]
0 - 1.0V
I Cooling fan is operating.
35 BR/R Cooling fan relay (Low)
[Engine is running] BATTERY VOLTAGE
I Cooling fan is not operating. (11 - 14V)

Approximately 0 - 5V
[Engine is running]
36 Y A/T signal No. 3 Output voltage fluctuates peri-
I Idle speed
odically.

Approximately 0 - 5V
[Engine is running]
37 LG A/T signal No. 5 Output voltage fluctuates peri-
I Idle speed
odically.

[Ignition switch “ON”] 0 - 1.0V

38 LG/B MIL [Engine is running] BATTERY VOLTAGE
I Idle speed (11 - 14V)

[Ignition switch “ON”] Approximately 0V

42 BR/W Start signal
[Ignition switch “START”] 9 - 12V

[Ignition switch “OFF”] 0V

43 R Ignition switch BATTERY VOLTAGE
[Ignition switch “ON”]
(11 - 14V)

[Ignition switch “ON”]

Approximately 0V
I Gear position is “P” or “N”.
44 G/OR PNP switch
[Ignition switch “ON”] BATTERY VOLTAGE
I Except the above gear position (11 - 14V)

[Engine is running]
Approximately 0V
Air conditioner switch I Both A/C switch and blower switch are “ON”.
45 G/B
signal [Engine is running] BATTERY VOLTAGE
I A/C switch is “OFF”. (11 - 14V)

[Engine is running]
I Idle speed
0V
I Ambient air temperature is above 25°C (77°F).
Ambient air tempera- I Air conditioner is operating.
46 W/L
ture switch signal [Engine is running]
I Idle speed
Approximately 5V
I Ambient air temperature is above 25°C (77°F).
I Air conditioner is not operating.

EC-108
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
NO.
COLOR GI
[Engine is running]
0 - 1.0V
Power steering oil I Steering wheel is being turned. MA
47 G
pressure switch [Engine is running] BATTERY VOLTAGE
I Steering wheel is not being turned. (11 - 14V)
EM
[Engine is running]
48 B ECM ground Engine ground
I Idle speed

[Engine is running] LC
0 - 1.0V
Electronic controlled I Idle speed
49 W
engine mount-1 [Engine is running] BATTERY VOLTAGE
I Except the above (11 - 14V)

[Engine is running] BATTERY VOLTAGE

Electronic controlled I Idle speed (11 - 14V) FE
50 W/R
engine mount-2 [Engine is running]
0 - 1.0V
I Except the above CL
[Engine is running]
51 PU A/C cut signal 0 - 0.5V
I Air conditioner is operating.
MT
[Engine is running]
BATTERY VOLTAGE
I Rear window defogger: ON
(11 - 14V)
52 W/G Electrical load signal I Hi-beam headlamp: ON AT
[Engine is running]
0V
I Electrical load: OFF
AX
[Engine is running] BATTERY VOLTAGE
Throttle position switch I Accelerator pedal fully released (11 - 14V)
56 GY/L
(Closed position) [Engine is running] SU
Approximately 0V
I Accelerator pedal depressed

57 B ECM ground
[Engine is running]
Engine ground BR
I Idle speed

[Engine is running]
58 B Sensors’ ground I Warm-up condition Approximately 0V ST
I Idle speed

A/T diagnosis commu- [Engine is running]

Approximately 0 - 2.0V RS
60 BR/W Output voltage fluctuates peri-
nication line I Idle speed
odically.

[Engine is running] BT
I Warm-up condition 1.2 - 1.8V
I Idle speed
61 W Mass air flow sensor HA
[Engine is running]
I Warm-up condition 1.6 - 2.2V
I Engine speed is 2,500 rpm.
SC
0 - Approximately 1.0V (Peri-
odically change)
EL
[Engine is running]
Heated oxygen sensor
62 W I Warm-up condition
1 (front) (bank 2)
I Engine speed is 2,000 rpm. IDX

SEF059V

EC-109
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

0 - Approximately 1.0V (Peri-

odically change)

[Engine is running]
Heated oxygen sensor
63 W I Warm-up condition
1 (front) (bank 1)
I Engine speed is 2,000 rpm.

SEF059V

Approximately 0 - 4.8V
Intake air temperature
64 Y/G [Engine is running] Output voltage varies with
sensor
intake air temperature.

Approximately 2.3V★
(AC voltage)

[Engine is running]
65 W Crankshaft position
I Warm-up condition
75 W sensor (REF)
I Idle speed

SEF581X

Approximately 4.2V★
(AC voltage)

[Engine is running]
66 W Camshaft position sen-
I Warm-up condition
76 W sor (PHASE)
I Idle speed

SEF582X

Power supply for ECM BATTERY VOLTAGE

67 W/L [Ignition switch “OFF”]
(Buck-up) (11 - 14V)

Approximately 0 - 5V
[Engine is running]
68 BR A/T signal No. 1 Output voltage fluctuates peri-
I Idle speed
odically.

[Ignition switch “ON”]

69 GY Data link connector Approximately 0V
I CONSULT-II is turned “ON”.

Approximately 0 - 4.8V
Engine coolant tem-
70 Y [Engine is running] Output voltage varies with
perature sensor
engine coolant temperature.

[Engine is running]
Heated oxygen sensor
71 W I Warm-up condition 0 - Approximately 1.0V
2 (rear) (bank 2)
I Engine speed is 2,000 rpm.

[Engine is running]
Heated oxygen sensor
72 W I Warm-up condition 0 - Approximately 1.0V
2 (rear) (bank 1)
I Engine speed is 2,000 rpm.

[Engine is running]
Mass air flow sensor
73 B I Warm-up condition Approximately 0V
ground
I Idle speed

EC-110
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
NO.
COLOR GI
Approximately 0 - 5V
[Engine is running]
77 GY A/T signal No. 2 Output voltage fluctuates peri- MA
I Idle speed
odically.

Approximately 0 - 5V
[Engine is running] EM
78 OR A/T signal No. 4 Output voltage fluctuates peri-
I Idle speed
odically.

Absolute pressure sen- LC

80 W [Ignition switch “ON”] Approximately 4.4V
sor

[Engine is running]
Refrigerant pressure I Warm-up condition
81 W 0.36 - 3.88V
sensor I Both A/C switch and blower switch are “ON”.
(Compressor operates.)

[Engine is running]
FE
I Warm-up condition Approximately 0.4V
Throttle position sensor I Accelerator pedal fully released
82 W CL
signal output
[Ignition switch “ON”]
Approximately 4V
I Accelerator pedal fully depressed

Approximately 2.4V
MT

AT
[Engine is running]
I Idle speed
AX
SEF057V
Crankshaft position
85 W
sensor (POS) SU
Approximately 2.3V

BR
[Engine is running]
I Engine speed is 2,000 rpm.
ST
SEF058V
RS
Approximately 2.5V

[Engine is running] BT
I Jack up front wheels.
I In 1st gear position
I 10 km/h (6 MPH) HA
SEF583X
86 P/L Vehicle speed sensor SC
Approximately 2.0V

[Engine is running] EL
I Jack up front wheels.
I In 2nd gear position
I 30 km/h (19 MPH) IDX
SEF584X

EC-111
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITH EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

[Engine is running]
I Warm-up condition 0.15 - 0.85V
91 L/W Throttle position sensor I Accelerator pedal fully released
[Ignition switch “ON”]
3.5 - 4.7V
I Accelerator pedal fully depressed

Approximately 0 - 4.8V
Fuel tank temperature
92 P/L [Engine is running] Output voltage varies with
sensor
fuel tank temperature.

[Engine is running]
93 W Knock sensor Approximately 2.5V
I Idle speed

[Ignition switch “ON”]

95 BR Data link connector Approximately 0V
I CONSULT-II is turned “ON”.

101 R/B Injector No. 1

102 L/W Injector No. 5
103 R/W Injector No. 2 [Engine is running] BATTERY VOLTAGE
104 PU/R Injector No. 6 I Idle speed (11 - 14V)
105 R/Y Injector No. 3
107 R/L Injector No. 4

106 B [Engine is running]

ECM ground Engine ground
108 B I Idle speed

110 R/G BATTERY VOLTAGE

Power supply for ECM [Ignition switch “ON”]
112 R/G (11 - 14V)

111 R Sensors’ power supply [Ignition switch “ON”] Approximately 5V

[Ignition switch “ON”]

115 OR Data link connector Approximately 2 - 11V
I CONSULT-II is turned “ON”.

★: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

EC-112
 TROUBLE DIAGNOSIS — SPECIFICATION
VALUE WITH EURO-OBD
Description

Description NFEC0710
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI- GI
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions. MA
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items: EM
I B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection) LC
I A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
I MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing Condition NFEC0711
I Vehicle driven distance: More than 5,000 km (3,107 miles)
I Barometric pressure: 98.3 - 104.3 kPa (0.9836 - 1.0435 bar, 1.003 - 1.064 kg/cm2, 14.25 - 15.12 psi) FE
I Atmospheric temperature: 20 - 30°C (68 - 86°F)
I Engine coolant temperature: 75 - 95°C (167 - 203°F) CL
I Transmission: Warmed-up*1
I Electrical load: Not applied*2
I Engine speed: Idle MT
*1: After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE” (A/T
fluid temperature sensor signal) indicates less than 0.9V.
*2: Rear window defogger switch, air conditioner switch, lighting switch are “OFF”. Cooling fans are not oper-
AT
ating. Steering wheel is straight ahead.
AX

SU

BR

Inspection Procedure NFEC0712 ST

NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale dis-
play. RS
1. Perform “Basic Inspection”, EC-81.
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1/B2” and “MAS A/F BT
SE-B1” in “DATA MONITOR (SPEC)” mode with CONSULT-II.
4. Make sure that monitor items are within the SP value. HA
5. If NG, go to “Diagnostic Procedure”, EC-114.
SEF601Z

SC

EL

IDX

EC-113
 TROUBLE DIAGNOSIS — SPECIFICATION
VALUE WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0713

SEF613ZA

EC-114
TROUBLE DIAGNOSIS — SPECIFICATION
VALUE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX
SEF768Z

EC-115
 TROUBLE DIAGNOSIS — SPECIFICATION
VALUE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

SEF615Z

EC-116
 TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT WITH EURO-OBD
Description

Description NFEC0714
Intermittent incidents (I/I) may occur. In many cases, the problem resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the custom- GI
er’s complaint often do not recur on (1st trip) DTC visits. Realize also that the most frequent cause of I/I
occurrences is poor electrical connections. Because of this, the conditions under which the incident occurred
may not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indi- MA
cate the specific problem area.
COMMON I/I REPORT SITUATIONS NFEC0714S01
EM
STEP in Work Flow Situation

II The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than “0” or “[1t]”.
LC
III The symptom described by the customer does not recur.

IV (1st trip) DTC does not appear during the DTC Confirmation Procedure.

VI The Diagnostic Procedure for PXXXX does not indicate the problem area.
FE

CL

MT
Diagnostic Procedure NFEC0715
AT
1 INSPECTION START
Erase (1st trip) DTCs. Refer to “How to Erase Emission-related Diagnostic Information”, EC-55.
AX
© GO TO 2.

2 CHECK GROUND TERMINALS SU

Check ground terminals for corroding or loose connection.
Refer to GI-27, “GROUND INSPECTION”. BR
OK or NG
OK © GO TO 3. ST
NG © Repair or replace.

RS
3 SEARCH FOR ELECTRICAL INCIDENT
Perform GI-22, “Incident Simulation Tests”.
BT
OK or NG
OK © INSPECTION END
NG © Repair or replace.
HA

SC

EL

IDX

EC-117
 TROUBLE DIAGNOSIS FOR POWER SUPPLY WITH EURO-OBD
Main Power Supply and Ground Circuit

Main Power Supply and Ground Circuit

WIRING DIAGRAM NFEC0716

MEC457D

EC-118
TROUBLE DIAGNOSIS FOR POWER SUPPLY WITH EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST
MEC717C

RS

BT

HA

SC

EL

IDX

SEF366Z

EC-119
 TROUBLE DIAGNOSIS FOR POWER SUPPLY WITH EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)
DIAGNOSTIC PROCEDURE NFEC0717

1 INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes © GO TO 9.
No © GO TO 2.

2 CHECK ECM POWER SUPPLY CIRCUIT-I

1. Turn ignition switch “OFF” and then “ON”.
2. Check voltage between ECM terminal 43 and ground with CONSULT-II or tester.

SEF291X

OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connector M19, E89
I 10A fuse
I Harness for open or short between ECM and ignition switch
© Repair harness or connectors.

4 CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 48, 57, 106, 108 and engine ground.
Refer to WIRING DIAGRAM.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to power in harness or connectors.

EC-120
 TROUBLE DIAGNOSIS FOR POWER SUPPLY WITH EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

5 CHECK POWER SUPPLY-II

1. Disconnect ECM relay. GI

MA

EM

LC

SEF589PB
2. Check voltage between ECM relay terminals 2, 6 and ground with CONSULT-II or tester.

FE

CL

MT

SEF292X AT
OK or NG
OK © GO TO 7. AX
NG © GO TO 6.
SU
6 DETECT MALFUNCTIONING PART
Check the following. BR
I 15A fuses
I Harness for open or short between ECM relay and battery
© Repair open circuit or short to ground or short to power in harness or connectors. ST

7 CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT RS

1. Check harness continuity between ECM terminal 26 and ECM relay terminal 1.
Continuity should exist.
2. Also check harness for short to ground and short to power. BT
OK or NG
OK © Go to “DTC P1320 IGNITION SIGNAL”, EC-353. HA
NG © GO TO 8.
SC
8 DETECT MALFUNCTIONING PART
Check the following. EL
I Harness connectors E15, F18
I Harness for open or short between ECM relay and ECM
© Repair open circuit or short to ground or short to power in harness or connectors. IDX

EC-121
 TROUBLE DIAGNOSIS FOR POWER SUPPLY WITH EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

9 CHECK ECM POWER SUPPLY CIRCUIT-II

1. Stop engine.
2. Check voltage between ECM terminal 67 and ground with CONSULT-II or tester.

SEF293X

OK or NG
OK © GO TO 11.
NG © GO TO 10.

10 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E15, F18
I Harness for open or short between ECM and fuse
© Repair harness or connectors.

11 CHECK ECM POWER SUPPLY CIRCUIT-III

1. Turn ignition switch “ON” and then “OFF”.
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.

SEF294X

OK or NG
OK © GO TO 17.
NG (Battery voltage © GO TO 12.
does not exist.)
NG (Battery voltage © GO TO 14.
exists for more than a
few seconds.)

EC-122
 TROUBLE DIAGNOSIS FOR POWER SUPPLY WITH EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

12 CHECK ECM POWER SUPPLY CIRCUIT-IV

1. Disconnect ECM relay. GI

MA

EM

LC

SEF589PB
2. Check voltage between ECM relay terminal 3 and ground with CONSULT-II or tester.

FE

CL

MT

SEF295X AT
OK or NG
OK © GO TO 14. AX
NG © GO TO 13.
SU
13 DETECT MALFUNCTIONING PART
Check harness for open or short between ECM relay and 15A fuse. BR
© Repair open circuit or short to ground or short to power in harness or connectors.

ST
14 CHECK HARNESS CONTINUITY BETWEEN ECM RELAY AND ECM FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals 110, 112 and ECM relay terminal 5.
Refer to WIRING DIAGRAM. RS
Continuity should exist.
2. Also check harness for short to ground and short to power.
BT
OK or NG
OK © GO TO 16.
HA
NG © GO TO 15.

15 DETECT MALFUNCTIONING PART SC

Check the following.
I Harness connectors E15, F18 EL
I Harness for open or short between ECM and ECM relay
© Repair open circuit or short to ground or short to power in harness or connectors.
IDX

EC-123
 TROUBLE DIAGNOSIS FOR POWER SUPPLY WITH EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

16 CHECK ECM RELAY

1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5, 6 and 7.

SEF296X

OK or NG
OK © GO TO 17.
NG © Replace ECM relay.

17 CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 48, 57, 106, 108 and engine ground.
Refer to WIRING DIAGRAM.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK © GO TO 18.
NG © Repair open circuit or short to power in harness or connectors.

18 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-124
 DTC P0100 MASS AIR FLOW SENSOR (MAFS) WITH EURO-OBD
Component Description

Component Description NFEC0718

The mass air flow sensor is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire GI
intake flow. It consists of a hot wire that is supplied with electric
current from the ECM. The temperature of the hot wire is controlled
by the ECM a certain amount. The heat generated by the hot wire MA
is reduced as the intake air flows around it. The more air, the
greater the heat loss.
Therefore, the ECM must supply more electric current to maintain EM
the temperature of the hot wire as air flow increases. The ECM
detects the air flow by means of this current change.
SEF987W LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC0719
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
I Engine: After warming up Idle 1.2 - 1.8V
I Air conditioner switch: “OFF”
MAS A/F SE-B1 CL
I Shift lever: “N”
I No-load 2,500 rpm 1.6 - 2.2V

Idle 14.0 - 33.0%

CAL/LD VALUE ditto
MT
2,500 rpm 12.0 - 25.0%

MASS AIRFLOW ditto

Idle 2.0 - 6.0 g·m/s AT
2,500 rpm 7.0 - 20.0 g·m/s

AX

SU

BR

On Board Diagnosis Logic NFEC0720 ST

Malfunction is detected when
(Malfunction A) an excessively high voltage from the sensor is
sent to ECM when engine is not running, RS
(Malfunction B) an excessively low voltage from the sensor is sent
to ECM when engine is running,
(Malfunction C) a voltage from the sensor is constantly approx. BT
1.0V when engine is running.
FAIL-SAFE MODE NFEC0720S01 HA
When the malfunction B is detected, the ECM enters fail-safe mode
and the MIL lights up.
Detected items Engine operating condition in fail-safe mode
SC
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
EL

IDX

EC-125
 DTC P0100 MASS AIR FLOW SENSOR (MAFS) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0721

MALFUNCTION A NFEC0721S01
I Harness or connectors
(The sensor circuit is open or shorted.)
I Mass air flow sensor
MALFUNCTION B OR C NFEC0721S02
I Harness or connectors
(The sensor circuit is open or shorted.)
I Intake air leaks
I Mass air flow sensor
DTC Confirmation Procedure NFEC0722
Perform “PROCEDURE FOR MALFUNCTION A” first.
If the 1st trip DTC cannot be confirmed, perform “PROCE-
DURE FOR MALFUNCTION B AND C”.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.

PROCEDURE FOR MALFUNCTION A NFEC0722S01

With CONSULT-II NFEC0722S0101
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 6 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-128.
With GST NFEC0722S0102
Follow the procedure “With CONSULT-II” above.
SEF058Y

PROCEDURE FOR MALFUNCTION B AND C NFEC0722S02

With CONSULT-II NFEC0722S0201
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and wait 5 seconds at most.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-128.
With GST NFEC0722S0202
Follow the procedure “With CONSULT-II” above.
SEF058Y

EC-126
DTC P0100 MASS AIR FLOW SENSOR (MAFS) WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0723

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

MEC458D RS

BT

HA

SC

EL
SEF650XB

IDX

EC-127
 DTC P0100 MASS AIR FLOW SENSOR (MAFS) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure =NFEC0724

1 INSPECTION START
Which malfunction (A, B or C) is duplicated?

MTBL0399

Type I or Type II
Type I © GO TO 3.
Type II © GO TO 2.

2 CHECK INTAKE SYSTEM

Check the following for connection.
I Air duct
I Vacuum hoses
I Intake air passage between air duct to intake manifold collector
OK or NG
OK © GO TO 3.
NG © Reconnect the parts.

3 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 4.

EC-128
 DTC P0100 MASS AIR FLOW SENSOR (MAFS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK MAFS POWER SUPPLY CIRCUIT

1. Disconnect mass air flow sensor (MAFS) harness connector. GI

MA

EM

LC

SEC139C
2. Turn ignition switch “ON”.
3. Check voltage between MAFS terminals 2, 4 and ground with CONSULT-II or tester.
FE

CL

MT

AT
SEF297X

OK or NG AX
OK © GO TO 6.
NG © GO TO 5. SU

5 DETECT MALFUNCTIONING PART

BR
Check the following.
I Harness for open or short between ECM relay and mass air flow sensor
I Harness for open or short between mass air flow sensor and ECM ST
© Repair harness or connectors.

RS
6 CHECK MAFS GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
BT
3. Check harness continuity between MAFS terminal 3 and ECM terminal 73.
Refer to Wiring Diagram.
Continuity should exist.
HA
4. Also check harness for short to ground and short to power.
OK or NG SC
OK © GO TO 7.
NG © Repair open circuit or short to ground or short to power in harness or connectors. EL

IDX

EC-129
 DTC P0100 MASS AIR FLOW SENSOR (MAFS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK MAFS INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between MAFS terminal 1 and ECM terminal 61.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK MASS AIR FLOW SENSOR

1. Reconnect harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal 61 (Mass air flow sensor signal) and ground.

SEF298X
4. If the voltage is out of specification, disconnect MAFS harness connector and connect it again.
Then repeat above check.
OK or NG
OK © GO TO 9.
NG © Replace mass air flow sensor.

9 CHECK MAFS SHIELD CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect joint connector-18.
3. Check the following.
I Continuity between joint connector terminal 1 and ground
Refer to Wiring Diagram.
I Joint connector-18
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
4. Also check harness for short to power.
5. Then reconnect joint connector-18.
OK or NG
OK © GO TO 10.
NG © Repair open circuit or short to power in harness or connectors.

10 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-130
DTC P0110 INTAKE AIR TEMPERATURE
SENSOR WITH EURO-OBD
Component Description

Component Description NFEC0725

The intake air temperature sensor is mounted to the air duct hous-
ing. The sensor detects intake air temperature and transmits a sig- GI
nal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive
to the change in temperature. Electrical resistance of the thermistor MA
decreases in response to the temperature rise.
<Reference data> EM
Intake air
Voltage* V Resistance kΩ
temperature °C (°F)
SEF258X LC
20 (68) 3.5 2.1 - 2.9

80 (176) 1.23 0.27 - 0.38

*: These data are reference values and are measured between ECM terminal 64
(Intake air temperature sensor) and ground.
CAUTION: FE
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as CL
the ground.

SEF012P
MT
On Board Diagnosis Logic NFEC0726
Malfunction is detected when AT
(Malfunction A) an excessively low or high voltage from the sen-
sor is sent to ECM,
(Malfunction B) rationally incorrect voltage from the sensor is sent AX
to ECM, compared with the voltage signal from engine coolant
temperature sensor.
SU

BR

Possible Cause NFEC0727 ST

I Harness or connectors
(The sensor circuit is open or shorted.)
I Intake air temperature sensor RS

BT

HA

DTC Confirmation Procedure NFEC0728

SC
Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st trip
DTC cannot be confirmed, perform “PROCEDURE FOR MAL-
FUNCTION B”. EL
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, IDX
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.

EC-131
 DTC P0110 INTAKE AIR TEMPERATURE
SENSOR WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
PROCEDURE FOR MALFUNCTION A NFEC0728S01
With CONSULT-II NFEC0728S0101
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 5 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-134.
With GST NFEC0728S0102
Follow the procedure “With CONSULT-II” above.
SEF058Y

PROCEDURE FOR MALFUNCTION B NFEC0728S02

CAUTION:
Always drive vehicle at a safe speed.
TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the
shop or by driving the vehicle. If a road test is expected to be
easier, it is unnecessary to lift the vehicle.
With CONSULT-II NFEC0728S0201
1) Wait until engine coolant temperature is less than 90°C
(194°F).
SEF176Y
a) Turn ignition switch “ON”.
b) Select “DATA MONITOR” mode with CONSULT-II.
c) Check the engine coolant temperature.
d) If the engine coolant temperature is not less than 90°C
(194°F), turn ignition switch “OFF” and cool down engine.
I Perform the following steps before engine coolant temperature
is above 90°C (194°F).
2) Turn ignition switch “ON”.
3) Select “DATA MONITOR” mode with CONSULT-II.
4) Start engine.
5) Hold vehicle speed at more than 70 km/h (43 MPH) for 100
consecutive seconds.
6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-134.
With GST NFEC0728S0202
Follow the procedure “With CONSULT-II” above.

EC-132
DTC P0110 INTAKE AIR TEMPERATURE
SENSOR WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0729

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC438D

EC-133
 DTC P0110 INTAKE AIR TEMPERATURE
SENSOR WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0730

1 CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect intake air temperature sensor harness connector.

SEF258X
3. Turn ignition switch “ON”.
4. Check voltage between terminal 1 and ground.

SEF301X

OK or NG
OK © GO TO 3.
NG © GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E8, F17
I Harness for open or short between ECM and intake air temperature sensor
© Repair harness or connectors.

3 CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between sensor terminal 2 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © GO TO 4.

EC-134
 DTC P0110 INTAKE AIR TEMPERATURE
SENSOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness connectors E8, F17
I Harness for open or short between ECM and intake air temperature sensor
I Harness for open or short between TCM (Transmission Control Module) and intake air temperature sensor MA
© Repair open circuit or short to power in harness or connectors.

EM
5 CHECK INTAKE AIR TEMPERATURE SENSOR
Check resistance between intake air temperature sensor terminals 1 and 2 as shown in the figure.
LC

FE

CL

MT

AT

AX

SEF302X
SU
OK or NG
OK © GO TO 6.
BR
NG © Replace intake air temperature sensor.

6 CHECK INTERMITTENT INCIDENT

ST
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END RS

BT

HA

SC

EL

IDX

EC-135
 DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITH EURO-OBD
Component Description

Component Description NFEC0731

The engine coolant temperature sensor is used to detect the
engine coolant temperature. The sensor modifies a voltage signal
from the ECM. The modified signal returns to the ECM as the
engine coolant temperature input. The sensor uses a thermistor
which is sensitive to the change in temperature. The electrical
resistance of the thermistor decreases as temperature increases.

SEF594K

<Reference data>
Engine coolant
Voltage* V Resistance kΩ
temperature °C (°F)

−10 (14) 4.4 7.0 - 11.4

20 (68) 3.5 2.1 - 2.9

50 (122) 2.2 0.68 - 1.00

90 (194) 0.9 0.236 - 0.260

*: These data are reference values and are measured between ECM terminal 70
SEF012P (Engine coolant temperature sensor) ground.
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.

On Board Diagnosis Logic NFEC0732

Malfunction is detected when an excessively high or low voltage
from the sensor is sent to ECM.
FAIL-SAFE MODE NFEC0732S01
When this malfunction is detected, the ECM enters fail-safe mode
and the MIL lights up.
Detected items Engine operating condition in fail-safe mode

Engine coolant temperature will be determined by ECM based on the time after turning ignition switch
“ON” or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.

Engine coolant temperature decided (CONSULT-II

Condition
display)
Engine coolant tem-
perature sensor circuit Just as ignition switch is turned ON or Start 40°C (104°F)

More than approx. 4 minutes after ignition ON or

80°C (176°F)
Start

40 - 80°C (104 - 176°F)

Except as shown above
(Depends on the time)

EC-136
DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0733

I Harness or connectors
(The sensor circuit is open or shorted.) GI
I Engine coolant temperature sensor
MA

EM

LC
DTC Confirmation Procedure NFEC0734
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test. FE
WITH CONSULT-II NFEC0734S01
1) Turn ignition switch “ON”. CL
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 5 seconds.
SEF058Y 4) If 1st trip DTC is detected, go to “Diagnostic Procedure”, MT
EC-139.
WITH GST NFEC0734S02
AT
Follow the procedure “WITH CONSULT-II” above.

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-137
 DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0735

MEC459D

EC-138
 DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0736

1 CHECK ECTS POWER SUPPLY CIRCUIT GI

1. Turn ignition switch “OFF”.
2. Disconnect engine coolant temperature sensor (ECTS) harness connector.
MA

EM

LC

SEF259X
3. Turn ignition switch “ON”. FE
4. Check voltage between ECTS terminal 1 and ground with CONSULT-II or tester.

CL

MT

AT

AX
SEF585X

OK or NG
SU
OK © GO TO 2.
NG © Repair open circuit or short to ground or short to power in harness or connectors.
BR
2 CHECK ECTS GROUND CIRCUIT FOR OPEN AND CIRCUIT
1. Turn ignition switch “OFF”. ST
2. Check harness continuity between ECTS terminal 2 and engine ground.
Refer to Wiring Diagram.
Continuity should exist. RS
3. Also check harness for short to power.
OK or NG BT
OK © GO TO 4.
NG © GO TO 3. HA

3 DETECT MALFUNCTIONING PART

SC
Check the following.
I Harness for open or short between ECM and engine coolant temperature sensor
I Harness for open or short between TCM (Transmission Control Module) and engine coolant temperature sensor EL
© Repair open circuit or short to power in harness or connectors.

IDX

EC-139
 DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.

SEF304X

OK or NG
OK © GO TO 5.
NG © Replace engine coolant temperature sensor.

5 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-140
 DTC P0120 THROTTLE POSITION SENSOR WITH EURO-OBD
Description

Description NFEC0737
COMPONENT DESCRIPTION
The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiom-
NFEC0737S01
GI
eter which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In
addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal MA
to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sen-
sor. This sensor controls engine operation such as fuel cut. On the other hand, the “Wide open and closed EM
throttle position switch”, which is built into the throttle position sensor unit, is not used for engine control.

LC

FE

CL

MT

AT

AX
AEC929

CONSULT-II Reference Value in Data Monitor SU

Mode NFEC0738
Specification data are reference values. BR
MONITOR ITEM CONDITION SPECIFICATION

I Engine: After warming up, idle

Throttle valve: fully closed 0.15 - 0.85V
ST
the engine
THRTL POS SEN I Engine: After warming up
I Ignition switch: ON Throttle valve: fully opened 3.5 - 4.7V
RS
(Engine stopped)

I Engine: After warming up, idle

Throttle valve: fully closed 0.0%
BT
the engine
ABSOL TH·P/S I Engine: After warming up
I Ignition switch: ON Throttle valve: fully opened Approx. 80% HA
(Engine stopped)

On Board Diagnosis Logic NFEC0739

SC
Malfunction is detected when an excessively low or high voltage
from the sensor is sent to ECM.
EL
FAIL-SAFE MODE NFEC0739S01
When the malfunction is detected, the ECM enters fail-safe mode
and the MIL lights up. IDX

EC-141
 DTC P0120 THROTTLE POSITION SENSOR WITH EURO-OBD
On Board Diagnosis Logic (Cont’d)

Detected items Engine operating condition in fail-safe mode

Throttle position will be determined based on the injected fuel amount and the engine speed.
Therefore, acceleration will be poor.
Throttle position sensor Condition Driving condition
circuit
When engine is idling Normal

When accelerating Poor acceleration

Possible Cause NFEC0740

I Harness or connectors
(The throttle position sensor circuit is open or shorted.)
I Throttle position sensor

DTC Confirmation Procedure NFEC0741

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
CAUTION:
Always drive vehicle at a safe speed.
TESTING CONDITION:
I Before performing the following procedure, confirm that
battery voltage is more than 10V at idle.
I This test may be conducted with the drive wheels lifted in
the shop or by driving the vehicle. If a road test is
expected to be easier, it is unnecessary to lift the vehicle.

WITH CONSULT-II NFEC0741S01

1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2) Start engine and maintain the following conditions for at least
5 consecutive seconds.
Vehicle speed More than 5 km/h (3 MPH)

Selector lever Suitable position except “P” or “N” position

3) If 1st trip DTC is detected, go to “Diagnostic Procedure”,

SEF065Y EC-145.

EC-142
DTC P0120 THROTTLE POSITION SENSOR WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
WITH GST NFEC0741S02
Follow the procedure “WITH CONSULT-II” above.
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-143
 DTC P0120 THROTTLE POSITION SENSOR WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0742

MEC460D

SEF652XB

EC-144
 DTC P0120 THROTTLE POSITION SENSOR WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure =NFEC0743

1 RETIGHTEN GROUND SCREWS GI

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
MA

EM

LC

SEF255X
FE
© GO TO 2.
CL
2 CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect throttle position sensor harness connector. MT

AT

AX

SU

SEC001C BR
2. Turn ignition switch “ON”.
3. Check voltage between throttle position sensor terminal 3 and ground with CONSULT-II or tester.
ST

RS

BT

HA
SEF306X

OK or NG SC
OK © GO TO 3.
NG © Repair open circuit or short to ground or short to power in harness or connectors. EL

IDX

EC-145
 DTC P0120 THROTTLE POSITION SENSOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between sensor terminal 1 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
I Harness for open or short between ECM and throttle position sensor
I Harness for open or short between TCM (Transmission Control Module) and throttle position sensor
© Repair open circuit or short to power in harness or connectors.

5 CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 91 and throttle position sensor terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT-II) © GO TO 6.
OK (Without CONSULT- © GO TO 7.
II)
NG © Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK THROTTLE POSITION SENSOR

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine (ignition switch OFF).
3. Turn ignition switch ON.
4. Select “DATA MONITOR” mode with CONSULT-II.
5. Check voltage of “THRTL POS SEN” under the following conditions.
Voltage measurement must be made with throttle position sensor installed in vehicle.

SEF062Y

OK or NG
OK © GO TO 9.
NG © GO TO 8.

EC-146
 DTC P0120 THROTTLE POSITION SENSOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK THROTTLE POSITION SENSOR

Without CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Stop engine (ignition switch OFF).
3. Turn ignition switch ON. MA
4. Check voltage between ECM terminal 91 (Throttle position sensor signal) and ground.
Voltage measurement must be made with throttle position sensor installed in vehicle.
EM

LC

MTBL0231

OK or NG
OK © GO TO 9.
FE
NG © GO TO 8.

8 ADJUST CLOSED THROTTLE POSITION SWITCH CL

Adjust closed throttle position switch. Refer to “Basic Inspection”, EC-81.
MT

AT

AX

MTBL0662
SU
OK or NG
OK © GO TO 9.
BR
NG © Replace throttle position sensor. To adjust it, perform “Basic Inspection”, EC-81.

ST
9 CHECK THROTTLE POSTION SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect joint connector-18 RS
3. Check the following
I Continuity between joint connector terminal 2 and ground
I Joint connector BT
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
I Also check harness for short to power. HA
I Then reconnect joint connector-18.
OK or NG
SC
OK © GO TO 10.
NG © Repair open circuit or short to to power in harness or connectors.
EL
10 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. IDX
© INSPECTION END

EC-147
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Component Description

Component Description NFEC0744

The heated oxygen sensor 1 (front) is placed into the front tube. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 (front) has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions.
The heated oxygen sensor 1 (front) signal is sent to the ECM. The
ECM adjusts the injection pulse duration to achieve the ideal air-
fuel ratio. The ideal air-fuel ratio occurs near the radical change
from 1V to 0V.
SEF463R

SEF288D

CONSULT-II Reference Value in Data Monitor

Mode NFEC0745
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

HO2S1 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S1 (B2)
Maintaining engine speed at 2,000
HO2S1 MNTR I Engine: After warming up LEAN +, RICH
(B1) rpm
Changes more than 5 times during
HO2S1 MNTR
10 seconds.
(B2)

On Board Diagnosis Logic NFEC0746

Under the condition in which the heated oxygen sensor 1 (front)
signal is not input, the ECM circuits will read a continuous approxi-
mately 0.3V. Therefore, for this diagnosis, the time that output
voltage is within 200 to 400 mV range is monitored, and the diag-
nosis checks that this time is not inordinately long.
Malfunction is detected when the voltage from the sensor is con-
stantly approx. 0.3V.

SEF237U

EC-148
DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0747

I Harness or connectors
(The sensor circuit is open or shorted.) GI
I Heated oxygen sensor 1 (front)
MA

EM

LC
DTC Confirmation Procedure NFEC0748
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, FE
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION: CL
Before performing the following procedure, confirm that bat-
tery voltage is more than 11V at idle. MT
SEF825Y
WITH CONSULT-II NFEC0748S01
1) Start engine and warm it up to normal operating temperature.
AT
2) Select “HO2S1 (B1) P0130/HO2S1 (B2) P0150” of “HO2S1
(B1)/(B2)” in “DTC WORK SUPPORT” mode with CONSULT-
II. AX
3) Touch “START”.
4) Let it idle for at least 3 minutes.
NOTE: SU
Never raise engine speed above 3,600 rpm after this step. If
the engine speed limit is exceeded, return to step 4.
BR
SEF826Y 5) When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions
continuously until “TESTING” changes to “COMPLETED”. (It ST
will take approximately 10 to 60 seconds.)
ENG SPEED 1,400 - 2,400 rpm
RS
Vehicle speed More than 64 km/h (40 MPH)

B/FUEL SCHDL 2.0 - 10 msec

BT
Selector lever Suitable position

If “TESTING” is not displayed after 5 minutes, retry from HA

SEF645Y step 2.
6) Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”. If “NG” is displayed, refer to “Diagnostic SC
Procedure”, EC-153.
EL

IDX

EC-149
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Overall Function Check

Overall Function Check NFEC0749

Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed.
WITHOUT CONSULT-II NFEC0749S01
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 63 (HO2S1 bank
1 signal) or 62 (HO2S1 bank 2 signal) and engine ground.
3) Check the following with engine speed held at 2,000 rpm con-
SEF308XA stant under no load.
I The voltage does not remain in the range of 0.2 - 0.4V.
4) If NG, go to “Diagnostic Procedure”, EC-153.

EC-150
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0750

BANK 1 NFEC0750S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA
MEC439D

SC

EL

IDX

SEF854YC

EC-151
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0750S02

MEC440D

SEF855YC

EC-152
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0751

1 INSPECTION START GI
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
MA

EM

LC

SEF255X
3. Make sure HO2S1 (front) harness protector color, and disconnect corresponding heated oxygen sensor 1 (front) har- FE
ness connector.

CL

MT

AT

AX
SEF505YA

SU

BR

ST

RS
SEF902XA

© GO TO 2.
BT

HA

SC

EL

IDX

EC-153
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK HEATED OXYGEN SENSOR 1 (FRONT) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows.
Refer to Wiring Diagram.

MTBL0484
Continuity should exist.
3. Check harness continuity between ECM terminal or HO2S1 (front) terminal and ground as follows.
Refer to Wiring Diagram.

MTBL0485
Continuity should not exist.
4. Also check harness for short to power.
OK or NG
OK (With CONSULT-II) © GO TO 3.
OK (Without CONSULT- © GO TO 4.
II)
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-154
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”. MA
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.
EM

LC

FE
SEF646Y
6. Check the following.
I “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
CL
5 times (cycles) are counted as shown below.
MT

AT

AX

SU
SEF647YA
I “HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
I “HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once. BR
I “HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

ST

RS

BT

HA
SEF648Y
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a SC
hard surface such as a concrete floor; use a new one.
OK or NG EL
OK © GO TO 6.
NG © GO TO 5.
IDX

EC-155
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 signal) or 62 (HO2S1 bank 2 signal) and engine
ground.
3. Check the following with engine speed held at 2,000 rpm constant under no load.

SEF967XA
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.

SEF505YA
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner and
approved anti-seize lubricant. Refer to “Commercial Service Tools”, EC-18.

© Replace malfunctioning heated oxygen sensor 1 (front).

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-156
 DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (FRONT) (LEAN SHIFT
MONITORING) WITH EURO-OBD
Component Description

Component Description NFEC0752

The heated oxygen sensor 1 (front) is placed into the front tube. It
detects the amount of oxygen in the exhaust gas compared to the GI
outside air. The heated oxygen sensor 1 (front) has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. MA
The heated oxygen sensor 1 (front) signal is sent to the ECM. The
ECM adjusts the injection pulse duration to achieve the ideal air-
fuel ratio. The ideal air-fuel ratio occurs near the radical change EM
from 1V to 0V.
SEF463R LC

FE

CL

SEF288D
MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0753
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
HO2S1 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S1 (B2) SU
Maintaining engine speed at 2,000
HO2S1 MNTR I Engine: After warming up LEAN +, RICH
(B1) rpm
Changes more than 5 times during BR
HO2S1 MNTR
10 seconds.
(B2)

ST

RS

BT

HA

On Board Diagnosis Logic NFEC0754

SC
To judge the malfunction, the output from the heated oxygen sen-
sor 1 (front) is monitored to determine whether the “rich” output is
sufficiently high and whether the “lean” output is sufficiently low. EL
When both the outputs are shifting to the lean side, the malfunc-
tion will be detected.
Malfunction is detected when the maximum and minimum voltage IDX
from the sensor are not reached to the specified voltages.

SEF300U

EC-157
 DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (FRONT) (LEAN SHIFT
MONITORING) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0755

I Heated oxygen sensor 1 (front)
I Heated oxygen sensor 1 heater (front)
I Fuel pressure
I Injectors
I Intake air leaks

DTC Confirmation Procedure NFEC0756

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
I Always perform at a temperature above −10°C (14°F).
I Before performing following procedure, confirm that bat-
tery voltage is more than 11V at idle.
WITH CONSULT-II NFEC0756S01
1) Start engine and warm it up to normal operating temperature.
2) Stop engine and wait at least 10 seconds.
3) Turn ignition switch “ON” and select “HO2S1 (B1) P0131/
HO2S1 (B2) P0151” of “HO2S1 (B1)/(B2)” in “DTC WORK
SUPPORT” mode with CONSULT-II.
4) Touch “START”.
5) Start engine and let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,600 rpm after this step. If
SEF827Y
the engine speed limit is exceeded, return to step 5.
6) When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions
continuously until “TESTING” changes to “COMPLETED”. (It
will take approximately 50 seconds or more.)
ENG SPEED 1,200 - 2,600 rpm

Vehicle speed Less than 100 km/h (62 MPH)

B/FUEL SCHDL 3 - 9 msec

Selector lever Suitable position

SEF828Y
If “TESTING” is not displayed after 5 minutes, retry from
step 2.
7) Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”. If “NG” is displayed, refer to “Diagnostic
Procedure”, EC-159.

SEF651Y

EC-158
 DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (FRONT) (LEAN SHIFT
MONITORING) WITH EURO-OBD
Overall Function Check

Overall Function Check NFEC0757

Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might GI
not be confirmed.
WITH GST NFEC0757S01
MA
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 63 (HO2S1 bank
1 signal) or 62 (HO2S1 bank 2 signal) and engine ground. EM
3) Check one of the following with engine speed held at 2,000
rpm constant under no load.
SEF308XA LC
I The maximum voltage is over 0.6V at least one time.
I The minimum voltage is over 0.1V at least one time.
4) If NG, go to “Diagnostic Procedure”, EC-159.

FE

CL

MT
Diagnostic Procedure NFEC0758
AT
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws. AX

SU

BR

ST

SEF255X RS

© GO TO 2.
BT
2 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)
HA
Loosen and retighten corresponding heated oxygen sensor 1 (front).
Tightening torque:
40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb) SC
© GO TO 3.
EL

IDX

EC-159
 DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (FRONT) (LEAN SHIFT
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CLEAR THE SELF-LEARNING DATA

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”.

SEF652Y
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0174 detected?
Is it difficult to start engine?
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”.
3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 5 seconds at idle speed.
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure 1st trip DTC P0100 is displayed.
6. Erase the 1st trip DTC memory. Refer to “How to Erase Emission-related Diagnostic Information”, EC-55.
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0174 detected?
Is it difficult to start engine?
Yes or No
Yes © Perform trouble diagnosis for DTC P0171, P0174. Refer to EC-247.
No © GO TO 4.

EC-160
 DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (FRONT) (LEAN SHIFT
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT)

1. Stop engine. GI
2. Check heated oxygen sensor 1 (front) harness protector color.

MA

EM

LC

SEF505YA
3. Disconnect HO2S1 (front) harness connector.
4. Check resistance between HO2S1 (front) terminals as follows.
FE

CL

MT

AT
SEF310X
CAUTION: AX
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
SU
OK (With CONSULT-II) © GO TO 5.
OK (Without CONSULT- © GO TO 6.
BR
II)
NG © GO TO 7. ST

RS

BT

HA

SC

EL

IDX

EC-161
 DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (FRONT) (LEAN SHIFT
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”.
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.

SEF646Y
6. Check the following.
I “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
5 times (cycles) are counted as shown below.

SEF647YA
I “HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
I “HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once.
I “HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

SEF648Y
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

EC-162
 DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (FRONT) (LEAN SHIFT
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

Without CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 signal) or 62 (HO2S1 bank 2 signal) and engine
ground. MA
3. Check the following with engine speed held at 2,000 rpm constant under no load.

EM

LC

SEF967XA
FE
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one. CL
OK or NG
OK © GO TO 8. MT
NG © GO TO 7.
AT
7 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)
1. Turn ignition switch “OFF”. AX
2. Check heated oxygen sensor 1 (front) harness protector color.

SU

BR

ST

SEF505YA
RS
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.
BT

© Replace malfunctioning heated oxygen sensor 1 (front). HA

8 CHECK INTERMITTENT INCIDENT SC

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
For circuit, refer to “DTC P0130/P0150 HO2S1 (FRONT) (BANK 1)/(BANK 2) (CIRCUIT)”, EC-148.
© INSPECTION END
EL

IDX

EC-163
 DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1 (FRONT) (RICH SHIFT
MONITORING) WITH EURO-OBD
Component Description

Component Description NFEC0759

The heated oxygen sensor 1 (front) is placed into the front tube. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 (front) has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions.
The heated oxygen sensor 1 (front) signal is sent to the ECM. The
ECM adjusts the injection pulse duration to achieve the ideal air-
fuel ratio. The ideal air-fuel ratio occurs near the radical change
from 1V to 0V.
SEF463R

SEF288D

CONSULT-II Reference Value in Data Monitor

Mode NFEC0760
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

HO2S1 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S1 (B2)
Maintaining engine speed at 2,000
HO2S1 MNTR I Engine: After warming up LEAN +, RICH
(B1) rpm
Changes more than 5 times during
HO2S1 MNTR
10 seconds.
(B2)

On Board Diagnosis Logic NFEC0761

To judge the malfunction, the output from the heated oxygen sen-
sor 1 (front) is monitored to determine whether the “rich” output is
sufficiently high. The “lean” output is sufficiently low. When both the
outputs are shifting to the rich side, the malfunction will be
detected.
Malfunction is detected when the maximum and minimum voltages
from the sensor are beyond the specified voltages.

SEF299U

EC-164
DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1 (FRONT) (RICH SHIFT
MONITORING) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0762

I Heated oxygen sensor 1 (front)
I Fuel pressure GI
I Injectors
I Heated oxygen sensor 1 heater (front) MA

EM

LC
DTC Confirmation Procedure NFEC0763
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, FE
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION: CL
I Always perform at a temperature above −10°C (14°F).
I Before performing the following procedure, confirm that MT
battery voltage is more than 11V at idle.
WITH CONSULT-II NFEC0763S01
1) Start engine and warm it up to normal operating temperature. AT
2) Stop engine and wait at least 5 seconds.
3) Turn ignition switch “ON” and select “HO2S1 (B1) P0132/
HO2S1 (B2) P0152” of “HO2S1 (B1)/(B2)” in “DTC WORK
AX
SUPPORT” mode with CONSULT-II.
4) Touch “START”. SU
5) Start engine and let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,600 rpm after this step. If BR
SEF829Y
the engine speed limit is exceeded, return to step 5.
6) When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions ST
continuously until “TESTING” changes to “COMPLETED”. (It
will take approximately 50 seconds or more.)
RS
ENG SPEED 1,200 - 2,600 rpm

Vehicle speed Less than 100 km/h (62 MPH) BT

B/FUEL SCHDL 3 - 9 msec

Selector lever Suitable position HA

SEF830Y
If “TESTING” is not displayed after 5 minutes, retry from
step 2. SC
7) Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”. If “NG” is displayed, refer to “Diagnostic
Procedure”, EC-166. EL

IDX

SEF655Y

EC-165
 DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1 (FRONT) (RICH SHIFT
MONITORING) WITH EURO-OBD
Overall Function Check

Overall Function Check NFEC0764

Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed.
WITH GST NFEC0764S01
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 63 (HO2S1 bank
1 signal) or 62 (HO2S1 bank 2 signal) and engine ground.
3) Check one of the following with engine speed held at 2,000
SEF308XA rpm constant under no load.
I The maximum voltage is below 0.8V at least one time.
I The minimum voltage is below 0.35V at least one time.
4) If NG, go to “Diagnostic Procedure”, EC-166.

Diagnostic Procedure NFEC0765

1 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 2.

2 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)

Loosen and retighten corresponding heated oxygen sensor 1 (front).
Tightening torque:
40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)

© GO TO 3.

EC-166
 DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1 (FRONT) (RICH SHIFT
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CLEAR THE SELF-LEARNING DATA

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”. MA

EM

LC

SEF652Y
FE
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0172 or P0175 detected?
Is it difficult to start engine?
CL
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”. MT
3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 5 seconds at idle speed.
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure 1st trip DTC P0100 is displayed. AT
6. Erase the 1st trip DTC memory. Refer to “How to Erase Emission-related Diagnostic Information”, EC-55.
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed. AX
Is the 1st trip DTC P0172 or P0175 detected?
Is it difficult to start engine?
Yes or No SU
Yes © Perform trouble diagnosis for DTC P0172, P0175. Refer to EC-255.
No © GO TO 4. BR

4 CHECK HEATED OXYGEN SENSOR (FRONT) CONNECTOR FOR WATER ST

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.
RS

BT

HA

SC
SEF505YA
3. Disconnect heated oxygen sensor 1 (front) harness connector. EL
4. Check connectors for water.
Water should not exist.
OK or NG
IDX
OK © GO TO 5.
NG © Repair or replace harness or connectors.

EC-167
 DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1 (FRONT) (RICH SHIFT
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT)

Check resistance between HO2S1 (front) terminals as follows.

SEF310X
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK (With CONSULT-II) © GO TO 6.
OK (Without CONSULT- © GO TO 7.
II)
NG © GO TO 8.

EC-168
 DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1 (FRONT) (RICH SHIFT
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”. MA
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.
EM

LC

FE
SEF646Y
6. Check the following.
I “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
CL
5 times (cycles) are counted as shown below.
MT

AT

AX

SU
SEF647YA
I “HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
I “HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once. BR
I “HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

ST

RS

BT

HA
SEF648Y
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a SC
hard surface such as a concrete floor; use a new one.
OK or NG EL
OK © GO TO 9.
NG © GO TO 8.
IDX

EC-169
 DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1 (FRONT) (RICH SHIFT
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 signal) or 62 (HO2S1 bank 2 signal) and engine
ground.
3. Check the following with engine speed held at 2,000 rpm constant under no load.

SEF967XA
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 9.
NG © GO TO 8.

8 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.

SEF505YA
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.

© Replace malfunctioning heated oxygen sensor 1 (front).

9 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
For circuit, refer to P0130/P0150 HO2S1 (FRONT) (BANK 1)/(BANK 2) (CIRCUIT)”, EC-148.
© INSPECTION END

EC-170
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Component Description

Component Description NFEC0766

The heated oxygen sensor 1 (front) is placed into the front tube. It
detects the amount of oxygen in the exhaust gas compared to the GI
outside air. The heated oxygen sensor 1 (front) has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. MA
The heated oxygen sensor 1 (front) signal is sent to the ECM. The
ECM adjusts the injection pulse duration to achieve the ideal air-
fuel ratio. The ideal air-fuel ratio occurs near the radical change EM
from 1V to 0V.
SEF463R LC

FE

CL

SEF288D
MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0767
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
HO2S1 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S1 (B2) SU
Maintaining engine speed at 2,000
HO2S1 MNTR I Engine: After warming up LEAN +, RICH
(B1) rpm
Changes more than 5 times during BR
HO2S1 MNTR
10 seconds.
(B2)

ST

RS

BT

HA

On Board Diagnosis Logic NFEC0768

SC
To judge the malfunction of heated oxygen sensor 1 (front), this
diagnosis measures response time of heated oxygen sensor 1
(front) signal. The time is compensated by engine operating (speed EL
and load), fuel feedback control constant, and heated oxygen sen-
sor 1 (front) temperature index. Judgment is based on whether the
compensated time [heated oxygen sensor 1 (front) cycling time IDX
index] is inordinately long or not.
Malfunction is detected when the response of the voltage signal
from the sensor takes more than the specified time.
SEF010V

EC-171
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0769

I Harness or connectors
(The sensor circuit is open or shorted.)
I Heated oxygen sensor 1 (front)
I Heated oxygen sensor 1 heater (front)
I Fuel pressure
I Injectors
I Intake air leaks
I Exhaust gas leaks
I PCV valve
I Mass air flow sensor

DTC Confirmation Procedure NFEC0770

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
I Always perform at a temperature above −10°C (14°F).
I Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.

EC-172
DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
WITH CONSULT-II NFEC0770S01
1) Start engine and warm it up to normal operating temperature.
2) Stop engine and wait at least 5 seconds. GI
3) Turn ignition switch “ON” and select “HO2S1 (B1) P0133/
HO2S1 (B2) P0153” of “HO2S1 (B1)/(B2)” in “DTC WORK
SUPPORT” mode with CONSULT-II.
MA
4) Touch “START”.
5) Start engine and let it idle for at least 3 minutes. EM
NOTE:
Never raise engine speed above 3,600 rpm after this step. If
SEF831Y
the engine speed limit is exceeded, return to step 5. LC
6) When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions
continuously until “TESTING” changes to “COMPLETED”. (It
will take approximately 40 to 50 seconds.)
ENG SPEED 1,200 - 2,800 rpm FE
Vehicle speed More than 80 km/h (50 MPH)

B/FUEL SCHDL 3 - 9 msec CL

Selector lever Suitable position
SEF832Y
MT
If “TESTING” is not displayed after 5 minutes, retry from
step 2.
7) Make sure that “OK” is displayed after touching “SELF-DIAG AT
RESULTS”. If “NG” is displayed, refer to “Diagnostic
Procedure”, EC-176.
AX

SU

BR
SEF658Y

Overall Function Check NFEC1055 ST

Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed. RS
WITHOUT CONSULT-II NFEC1055S01
1) Start engine and warm it up to normal operating temperature. BT
2) Set voltmeter probes between ECM terminal 63 (HO2S1 bank
1 signal) or 62 (HO2S1 bank 2 signal) and engine ground.
3) Check the following with engine speed held at 2,000 rpm con- HA
SEF308XB stant under no load.
I The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more
than 5 times within 10 seconds. SC
1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → EL
0 - 0.3V
4) If NG, go to “Diagnostic Procedure”, EC-35.
IDX

EC-173
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0772

BANK 1 NFEC0772S01

MEC439D

SEF854YC

EC-174
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0772S02

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MEC440D
HA

SC

EL

IDX

SEF855YC

EC-175
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0773

1 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 2.

2 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)

Loosen and retighten corresponding heated oxygen sensor 1 (front).
Tightening torque:
40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)

© GO TO 3.

3 CHECK FOR EXHAUST AIR LEAK

1. Start engine and run it at idle.
2. Listen for an exhaust air leak before three way catalyst (Manifold).

SEF099P

OK or NG
OK © GO TO 4.
NG © Repair or replace.

4 CHECK FOR INTAKE AIR LEAK

Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK © GO TO 5.
NG © Repair or replace.

EC-176
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CLEAR THE SELF-LEARNING DATA

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”. MA

EM

LC

SEF652Y
FE
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?
CL
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”. MT
3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 5 seconds at idle speed.
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure 1st trip DTC P0100 is displayed. AT
6. Erase the 1st trip DTC memory. Refer to “How to Erase Emission-related Diagnostic Information”, EC-55.
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed. AX
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?
Yes or No SU
Yes © Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-247,
EC-255. BR
No © GO TO 6.

ST

RS

BT

HA

SC

EL

IDX

EC-177
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HEATED OXYGEN SENSOR 1 (FRONT) HARNESS PROTECTOR COLOR

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector.

SEF505YA
3. Disconnect corresponding heated oxygen sensor 1 (front) harness connector.

SEF902XA

© GO TO 7.

7 CHECK HEATED OXYGEN SENSOR 1 (FRONT) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows.
Refer to Wiring Diagram.

MTBL0486
Continuity should exist.
3. Check harness continuity between ECM terminal or HO2S1 (front) terminal and ground as follows.
Refer to Wiring Diagram.

MTBL0487
Continuity should not exist.
4. Also check harness for short to power.
OK or NG
OK © GO TO 8.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-178
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT)

Check resistance between HO2S1 (front) terminals as follows. GI

MA

EM

LC

SEF310X
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
FE
OK or NG
OK © GO TO 9.
CL
NG © GO TO 13.

9 CHECK MASS AIR FLOW SENSOR

MT
1. Reconnect harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature. AT
3. Check voltage between ECM terminal 61 (Mass air flow sensor signal) and ground.

AX

SU

BR

ST
SEF298X
4. If the voltage is out of specification, disconnect mass air flow sensor harness connector and connect it again.
Then repeat above check.
RS
OK or NG
OK © GO TO 10.
BT
NG © Replace mass air flow sensor.

HA

SC

EL

IDX

EC-179
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

10 CHECK PCV VALVE

1. Install all removed parts.
2. Start engine and let it idle.
3. Remove PCV valve ventilation hose from PCV valve.
4. Make sure that a hissing noise will be heard as air passes through it and a strong vacuum should be felt immediately
when a finger is placed over valve inlet.

SEC137A

OK or NG
OK (With CONSULT-II) © GO TO 11.
OK (Without CONSULT- © GO TO 12.
II)
NG © Replace PCV valve.

EC-180
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

11 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”. MA
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.
EM

LC

FE
SEF646Y
6. Check the following.
I “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
CL
5 times (cycles) are counted as shown below.
MT

AT

AX

SU
SEF647YA
I “HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
I “HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once. BR
I “HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

ST

RS

BT

HA
SEF648Y
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a SC
hard surface such as a concrete floor; use a new one.
OK or NG EL
OK © GO TO 14.
NG © GO TO 13.
IDX

EC-181
 DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1 (FRONT) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

12 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 signal) or 62 (HO2S1 gank 2 signal) and engine
ground.
3. Check the following with engine speed held at 2,000 rpm constant under no load.

SEF967XA
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 14.
NG © GO TO 13.

13 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.

SEF505YA

© Replace malfunctioning heated oxygen sensor 1 (front).

14 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-182
 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH
VOLTAGE) WITH EURO-OBD
Component Description

Component Description NFEC0774

The heated oxygen sensor 1 (front) is placed into the front tube. It
detects the amount of oxygen in the exhaust gas compared to the GI
outside air. The heated oxygen sensor 1 (front) has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. MA
The heated oxygen sensor 1 (front) signal is sent to the ECM. The
ECM adjusts the injection pulse duration to achieve the ideal air-
fuel ratio. The ideal air-fuel ratio occurs near the radical change EM
from 1V to 0V.
SEF463R LC

FE

CL

SEF288D
MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0775
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
HO2S1 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S1 (B2) SU
Maintaining engine speed at 2,000
HO2S1 MNTR I Engine: After warming up LEAN +, RICH
(B1) rpm
Changes more than 5 times during BR
HO2S1 MNTR
10 seconds.
(B2)

ST

RS

BT

HA

On Board Diagnosis Logic NFEC0776

SC
To judge the malfunction, the diagnosis checks that the heated
oxygen sensor 1 (front) output is not inordinately high.
Malfunction is detected when an excessively high voltage from the EL
sensor is sent to ECM.
IDX

SEF301UA

EC-183
 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH
VOLTAGE) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0777

I Harness or connectors
(The sensor circuit is open or shorted.)
I Heated oxygen sensor 1 (front)

DTC Confirmation Procedure NFEC0778

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
WITH CONSULT-II NFEC0778S01
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Turn ignition switch “ON”.
SEF174Y 4) Select “DATA MONITOR” mode with CONSULT-II.
5) Restart engine and let it idle for 25 seconds.
6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-187.
WITH GST NFEC0778S02
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Restart engine and let it idle for 25 seconds.
4) Turn ignition switch “OFF” and wait at least 10 seconds.
5) Restart engine and let it idle for 25 seconds.
6) Select “MODE 3” with GST.
7) If DTC is detected, go to “Diagnostic Procedure”, EC-187.
I When using GST, “DTC Confirmation Procedure” should
be performed twice as much as when using CONSULT-II
because GST cannot display MODE 7 (1st trip DTC) con-
cerning this diagnosis. Therefore, using CONSULT-II is
recommended.

EC-184
 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH
VOLTAGE) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0779

BANK 1 NFEC0779S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA
MEC439D

SC

EL

IDX

SEF854YC

EC-185
 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH
VOLTAGE) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0779S02

MEC440D

SEF855YC

EC-186
 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH
VOLTAGE) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0780

1 INSPECTION START GI
1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.
MA

EM

LC

SEF505YA
3. Disconnect corresponding heated oxygen sensor 1 (front) harness connector. FE

CL

MT

AT

SEF902XA AX
© GO TO 2.
SU
2 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)
Loosen and retighten corresponding heated oxygen sensor 1 (front).
BR
Tightening torque:
40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)
ST
© GO TO 3.
RS

BT

HA

SC

EL

IDX

EC-187
 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH
VOLTAGE) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK HEATED OXYGEN SENSOR 1 (FRONT) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows.
Refer to Wiring Diagram.

MTBL0488
Continuity should exist.
3. Check harness continuity between ECM terminal or HO2S1 (front) terminal and ground as follows.
Refer to Wiring Diagram.

MTBL0489
Continuity should not exist.
4. Also check harness for short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK HEATED OXYGEN SENSOR 1 (FRONT) CONNECTOR FOR WATER

1. Disconnect heated oxygen sensor 1 (front) harness connector.
2. Check connectors for water.
Water should not exist.
OK or NG
OK (With CONSULT-II) © GO TO 5.
OK (Without CONSULT- © GO TO 6.
II)
NG © Repair or replace harness or connectors.

EC-188
 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH
VOLTAGE) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”. MA
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.
EM

LC

FE
SEF646Y
6. Check the following.
I “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
CL
5 times (cycles) are counted as shown left:
MT

AT

AX

SU
SEF647YA
I “HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
I “HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once. BR
I “HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

ST

RS

BT

HA
SEF648Y
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a SC
hard surface such as a concrete floor; use a new one.
OK or NG EL
OK © GO TO 8.
NG © GO TO 7.
IDX

EC-189
 DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH
VOLTAGE) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 signal) or 62 (HO2S1 bank 2 signal) and engine
ground.
3. Check the following with engine speed held at 2,000 rpm constant under no load.

SEF967XA
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

7 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.

SEF505YA
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.

© Replace malfunctioning heated oxygen sensor 1 (front).

8 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-190
 DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER
(FRONT) WITH EURO-OBD
Description

Description NFEC0781
SYSTEM DESCRIPTION NFEC0781S01
GI
Sensor Input Signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Heated oxygen

Heated oxygen sensors 1 MA
Engine speed sensor 1 heater
heater (front)
Crankshaft position sensor (REF) (front) control
EM
The ECM performs ON/OFF control of the heated oxygen sensor 1 heater (front) corresponding to the engine
speed.
OPERATION LC
NFEC0781S02

Engine speed rpm Heated oxygen sensors 1 heater (front)

Above 3,600 OFF

Below 3,600 ON
FE
CONSULT-II Reference Value in Data Monitor
Mode NFEC0782 CL
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION MT
HO2S1 HTR (B1) I Engine speed: Below 3,600 rpm ON
HO2S1 HTR (B2) I Engine speed: Above 3,600 rpm OFF AT

AX

SU

BR

On Board Diagnosis Logic NFEC0783 ST

Malfunction is detected when the current amperage in the heated
oxygen sensor 1 heater (front) circuit is out of the normal range.
[An improper voltage drop signal is sent to ECM through the heated RS
oxygen sensor 1 heater (front).]

BT

HA

Possible Cause NFEC0784

SC
I Harness or connectors
[The heated oxygen sensor 1 heater (front) circuit is open or
shorted.] EL
I Heated oxygen sensor 1 heater (front)
IDX

EC-191
 DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER
(FRONT) WITH EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0785

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is between 10.5V and 16V at idle.
WITH CONSULT-II NFEC0785S01

SEF058Y
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT.
2) Start engine and run it for at least 6 seconds at idle speed.
3) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-195.
WITH GST NFEC0785S02
1) Start engine and run it for at least 6 seconds at idle speed.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Start engine and run it for at least 6 seconds at idle speed.
4) Select “MODE 3” with GST.
5) If DTC is detected, go to “Diagnostic Procedure”, EC-195.
I When using GST, “DTC Confirmation Procedure” should
be performed twice as much as when using CONSULT-II
because GST cannot display MODE 7 (1st trip DTC) con-
cerning this diagnosis. Therefore, using CONSULT-II is
recommended.

EC-192
 DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER
(FRONT) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0786

BANK 1 NFEC0786S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA
MEC441D

SC

EL

IDX

SEF655XE

EC-193
 DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER
(FRONT) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0786S02

MEC442D

SEF656XE

EC-194
 DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER
(FRONT) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0787

1 CHECK HEATED OXYGEN SENSOR 1 (FRONT) POWER SUPPLY CIRCUIT GI

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.
MA

EM

LC

SEF505YA
3. Disconnect corresponding heated oxygen sensor 1 (front) harness connector. FE

CL

MT

AT

SEF902XA AX
4. Turn ignition switch “ON”.
5. Check voltage between HO2S1 (front) terminal 2 and ground with CONSULT-II or tester.
SU

BR

ST

RS
SEF311X

OK or NG BT
OK © GO TO 3.
NG © GO TO 2. HA

2 DETECT MALFUNCTIONING PART SC

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connector M19 EL
I 15A fuse
I Harness for open or short between heated oxygen sensor 1 (front) and fuse
© Repair harness or connectors.
IDX

EC-195
 DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER
(FRONT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK HEATED OXYGEN SENSOR 1 (FRONT) OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows.
Refer to Wiring Diagram.

MTBL0490
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT)

Check resistance between HO2S1 (front) terminals as follows.

SEF310X
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

EC-196
 DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER
(FRONT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)

1. Turn ignition switch “OFF”. GI
2. Check heated oxygen sensor 1 (front) harness protector color.

MA

EM

LC

SEF505YA
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant. FE

© Replace malfunctioning heated oxygen sensor 1 (front). CL

6 CHECK INTERMITTENT INCIDENT

MT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END
AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-197
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Component Description

Component Description NFEC0788

The heated oxygen sensor 2 (rear), after three way catalyst
(Manifold), monitors the oxygen level in the exhaust gas on each
bank.
Even if switching characteristics of the heated oxygen sensor 1
(front) are shifted, the air fuel ratio is controlled to stoichiometric,
by the signal from the heated oxygen sensor 2 (rear).
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
SEF327R
Under normal conditions the heated oxygen sensor 2 (rear) is not
used for engine control operation.

CONSULT-II Reference Value in Data Monitor

Mode NFEC0789
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

HO2S2 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S2 (B2)
Revving engine from idle up to
HO2S2 MNTR I Engine: After warming up
(B1) 2,000 rpm
LEAN +, RICH
HO2S2 MNTR
(B2)

On Board Diagnosis Logic NFEC0790

The heated oxygen sensor 2 (rear) has a much longer switching
time between rich and lean than the heated oxygen sensor 1
(front). The oxygen storage capacity before the three way catalyst
(Manifold) causes the longer switching time. To judge the malfunc-
tions of heated oxygen sensor 2 (rear), ECM monitors whether the
minimum voltage of sensor is sufficiently low during the various
driving condition such as fuel-cut.
Malfunction is detected when the minimum voltage from the sen-
sor is not reached to the specified voltage.
SEF304U

EC-198
DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0791

I Harness or connectors
(The sensor circuit is open or shorted.) GI
I Heated oxygen sensor 2 (rear)
I Fuel pressure MA
I Injectors

EM

LC
DTC Confirmation Procedure NFEC0792
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
I “COMPLETED” will appear on CONSULT-II screen when all FE
tests “COND1”, “COND2” and “COND3” are completed.
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least CL
10 seconds before conducting the next test.
TESTING CONDITION: MT
SEF833Y Never stop engine during this procedure. If the engine is
stopped, retry this procedure from step 2 in “Procedure for
COND1”. AT
WITH CONSULT-II NFEC0792S01
Procedure for COND1
AX
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Turn ignition switch “ON” and select “HO2S2 (B1) P0137/ SU
HO2S2 (B2) P0157” of “HO2S2 (B1)/(B2)” in “DTC WORK
SUPPORT” mode with CONSULT-II.
4) Touch “START”. BR
SEF834Y
5) Start engine and let it idle for at least 30 seconds.
6) Rev engine up to 2,000 rpm 2 or 3 times quickly under no load. ST
If “COMPLETED” appears on CONSULT-II screen, go to step
2 in “Procedure for COND3”.
If “COMPLETED” does not appear on CONSULT-II screen, go RS
to the following step.
7) Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes. BT
8) When the following conditions are met, “TESTING” will be dis-
played at “COND1” on the CONSULT-II screen. Maintain the
conditions continuously until “TESTING” changes to “COM- HA
SEF835Y PLETED”. (It will take approximately 60 seconds.)
ENG SPEED 1,500 - 3,600 rpm SC
Vehicle speed Above 70 km/h (43 MPH)

COOLAN TEMP/S 70 - 105°C (158 - 221°F) EL

Selector lever Suitable position
IDX
NOTE:
I If “TESTING” is not displayed after 5 minutes, retry from
step 2 in “Procedure for COND1”.
I If “COMPLETED” already appears at “COND2” on CON-
SULT-II screen before “Procedure for COND2” is

EC-199
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
conducted, it is unnecessary to conduct step 1 in “Proce-
dure for COND2”.

Procedure for COND2

1) While driving, release accelerator pedal completely with “OD”
OFF (A/T models only) from the above condition [step 8] until
“INCOMPLETE” at “COND2” on CONSULT-II screen has
turned to “COMPLETED”. (It will take approximately 4 sec-
onds.)
NOTE:
If “COMPLETED” already appears at “COND3” on CONSULT-II
screen before “Procedure for COND3” is conducted, it is
unnecessary to conduct step 1 in “Procedure for COND3”.
SEF836Y

Procedure for COND3

1) Stop vehicle and let it idle until “INCOMPLETE” of “COND3” on
CONSULT-II screen has turned to “COMPLETED”. (It will take
a maximum of approximately 6 minutes.)
2) Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”. If “NG” is displayed, refer to “Diagnostic
Procedure”, EC-204.

SEF661Y

Overall Function Check NFEC0793

Use this procedure to check the overall function of the heated oxy-
gen sensor 2 (rear) circuit. During this check, a 1st trip DTC might
not be confirmed.
WITH GST NFEC0793S01
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeter probes between ECM terminal 72 (HO2S2 bank
SEF312XA 1 signal) or 71 (HO2S2 bank 2 signal) and engine ground.
4) Check the voltage when racing up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be below 0.54V at least once during
this procedure.
If the voltage can be confirmed in step 4, step 5 is not
necessary.
5) Keep vehicle at idling for 10 minutes, then check the voltage.
Or check the voltage when coasting from 80 km/h (50 MPH)
in “D” position with “OD” OFF.
The voltage should be below 0.54V at least once during
this procedure.

EC-200
DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Overall Function Check (Cont’d)
6) If NG, go to “Diagnostic Procedure”, EC-204.

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-201
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0794

BANK 1 NFEC0794S01

MEC443D

SEF657XE

EC-202
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0794S02

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MEC444D
HA

SC

EL

IDX

SEF658XE

EC-203
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0795

1 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 2.

2 CLEAR THE SELF-LEARNING DATA

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”.

SEF652Y
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0172 or P0175 detected?
Is it difficult to start engine?
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”.
3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 5 seconds at idle speed.
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure 1st trip DTC P0100 is displayed.
6. Erase the 1st trip DTC memory. Refer to “How to Erase Emission-related Diagnostic Information”, EC-55.
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0172 or P0175 detected?
Is it difficult to start engine?
Yes or No
Yes © Perform trouble diagnosis for DTC P0172, P0175. Refer to EC-255.
No © GO TO 3.

EC-204
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK HEATED OXYGEN SENSOR 2 (REAR) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Check heated oxygen sensor 2 (rear) harness protector color.

MA

EM

LC

SEF154Z
3. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.
FE

CL

MT

AT
SEF467WB
4. Disconnect ECM harness connector.
5. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.
AX
Refer to Wiring Diagram.
SU

BR
MTBL0491
Continuity should exist. ST
6. Check harness continuity between ECM terminal or HO2S2 (rear) terminal and ground as follows.
Refer to Wiring Diagram.
RS

BT
MTBL0492
Continuity should not exist. HA
7. Also check harness for short to power.
OK or NG
SC
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.
EL

IDX

EC-205
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 2 (REAR) GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between HO2S2 (rear) terminal 4 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK (With CONSULT-II) © GO TO 5.
OK (Without CONSULT- © GO TO 6.
II)
NG © Repair open circuit or short to power in harness or connectors.

5 CHECK HEATED OXYGEN SENSOR 2 (REAR)

With CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item with CONSULT-
II.
4. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.

SEF066Y
“HO2S2 (B1)/(B2)” should be above 0.56V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.54V at least once when the “FUEL INJECTION” is −25%.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 9.
NG © GO TO 8.

EC-206
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HEATED OXYGEN SENSOR 2 (REAR)-I

Without CONSULT-II GI
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Set voltmeter probes between ECM terminal 72 (HO2S2 bank 1 signal) or 71 (HO2S2 bank 2 signal) and engine MA
ground.
4. Check the voltage when rewing up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
EM

LC

FE

SEF313XB
CL
OK or NG
OK © GO TO 9.
MT
NG © GO TO 7.

7 CHECK HEATED OXYGEN SENSOR 2 (REAR)-II

AT
Idle vehicle for 10 minutes, then check voltage between the same terminals as in Test No. 6; or check voltage when coast-
ing from 80 km/h (50 MPH) in “D” position with “OD” OFF. AX
The voltage should go below 0.54V at least once during this procedure.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a SU
hard surface such as a concrete floor; use a new one.
OK or NG
BR
OK © GO TO 9.
NG © GO TO 8.
ST
8 REPLACE HEATED OXYGEN SENSOR 2 (REAR)
1. Stop vehicle and turn ignition switch OFF. RS
2. Check heated oxygen sensor 2 (rear) harness protector color.

BT

HA

SC

EL
SEF154Z
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool IDX
J-43897-18 or J-43897-12 and approved anti-seize lubricant.

© Replace malfunctioning heated oxygen sensor 2 (rear).

EC-207
 DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2 (REAR) (MIN. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-208
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Component Description

Component Description NFEC0796

The heated oxygen sensor 2 (rear), after three way catalyst
(Manifold), monitors the oxygen level in the exhaust gas on each GI
bank.
Even if switching characteristics of the heated oxygen sensor 1
(front) are shifted, the air fuel ratio is controlled to stoichiometric, MA
by the signal from the heated oxygen sensor 2 (rear).
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner EM
conditions.
Under normal conditions the heated oxygen sensor 2 (rear) is not
SEF327R
used for engine control operation. LC

FE

CL

MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0797
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
HO2S2 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S2 (B2) SU
Revving engine from idle up to
HO2S2 MNTR I Engine: After warming up
(B1) 2,000 rpm
LEAN +, RICH BR
HO2S2 MNTR
(B2)

ST

RS

BT

HA

On Board Diagnosis Logic NFEC0798

SC
The heated oxygen sensor 2 (rear) has a much longer switching
time between rich and lean than the heated oxygen sensor 1
(front). The oxygen storage capacity before the three way catalyst EL
(Manifold) causes the longer switching time. To judge the malfunc-
tions of heated oxygen sensor 2 (rear), ECM monitors whether the
maximum voltage of the sensor is sufficiently high during the vari- IDX
ous driving condition such as fuel-cut.
Malfunction is detected when the maximum voltage from the sen-
sor is not reached to the specified voltage.
SEF303U

EC-209
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0799

I Harness or connectors
(The sensor circuit is open or shorted.)
I Heated oxygen sensor 2 (rear)
I Fuel pressure
I Injectors
I Intake air leaks

DTC Confirmation Procedure NFEC0800

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
I “COMPLETED” will appear on CONSULT-II screen when all
tests “COND1”, “COND2” and “COND3” are completed.
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.
TESTING CONDITION:
SEF837Y Never stop engine during this procedure. If the engine is
stopped, retry this procedure from step 2 in “Procedure for
COND1”.
WITH CONSULT-II NFEC0800S01
Procedure for COND1
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Turn ignition switch “ON” and select “HO2S2 (B1) P0138/
HO2S2 (B2) P0158” of “HO2S2 (B1)/(B2)” in “DTC WORK
SUPPORT” mode with CONSULT-II.
4) Touch “START”.
SEF838Y
5) Start engine and let it idle for at least 30 seconds.
6) Rev engine up to 2,000 rpm 2 or 3 times quickly under no load.
If “COMPLETED” appears on CONSULT-II screen, go to step
2 in “Procedure for COND3”.
If “COMPLETED” does not appear on CONSULT-II screen, go
to the following step.
7) Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes.
8) When the following conditions are met, “TESTING” will be dis-
played at “COND1” on the CONSULT-II screen. Maintain the
conditions continuously until “TESTING” changes to “COM-
SEF839Y PLETED”. (It will take approximately 60 seconds.)
ENG SPEED 1,500 - 3,600 rpm

Vehicle speed Above 70 km/h (43 MPH)

COOLAN TEMP/S 70 - 105°C (158 - 221°F)

Selector lever Suitable position

NOTE:
I If “TESTING” is not displayed after 5 minutes, retry from
step 2 in “Procedure for COND1”.
I If “COMPLETED” already appears at “COND2” on CON-
SULT-II screen before “Procedure for COND2” is

EC-210
DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
conducted, it is unnecessary to conduct step 1 in “Proce-
dure for COND2”.
GI

MA

EM

LC
Procedure for COND2
1) While driving, release accelerator pedal completely with “OD”
OFF (A/T models only) from the above condition [step 8] until
“INCOMPLETE” at “COND2” on CONSULT-II screen is turned
to “COMPLETED”. (It will take approximately 4 seconds.)
FE
NOTE:
If “COMPLETED” already appears at “COND3” on CONSULT-II
screen before “Procedure for COND3” is conducted, it is CL
unnecessary to conduct step 1 in “Procedure for COND3”.

SEF840Y
MT
Procedure for COND3
1) Stop vehicle and let it idle until “INCOMPLETE” of “COND3” on AT
CONSULT-II screen has turned to “COMPLETED”. (It will take
a maximum of approximately 6 minutes.)
2) Make sure that “OK” is displayed after touching “SELF-DIAG AX
RESULTS”.
If “NG” is displayed, refer to “Diagnostic Procedure”, EC-215.
SU

BR
SEF665Y

Overall Function Check NFEC0801 ST

Use this procedure to check the overall function of the heated oxy-
gen sensor 2 (rear) circuit. During this check, a 1st trip DTC might
not be confirmed. RS
WITH GST NFEC0801S01
1) Start engine and drive vehicle at a speed of more than 70 km/h BT
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeter probes between ECM terminal 72 (HO2S2 bank HA
SEF312XA 1 signal) or 71 (HO2S2 bank 2 signal) and engine ground.
4) Check the voltage when racing up to 4,000 rpm under no load
at least 10 times. SC
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.56V at least once during
this procedure. EL
If the voltage can be confirmed in step 4, step 5 is not
necessary.
IDX
5) Keep vehicle at idling for 10 minutes, then check the voltage.
Or check the voltage when coasting from 80 km/h (50 MPH)
in “D” position with “OD” OFF.
The voltage should be above 0.56V at least once during
this procedure.

EC-211
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Overall Function Check (Cont’d)
6) If NG, go to “Diagnostic Procedure”, EC-215.

EC-212
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0802

BANK 1 NFEC0802S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA
MEC443D

SC

EL

IDX

SEF657XE

EC-213
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0802S02

MEC444D

SEF658XE

EC-214
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0803

1 RETIGHTEN GROUND SCREWS GI

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
MA

EM

LC

SEF255X
FE
© GO TO 2.
CL
2 CLEAR THE SELF-LEARNING DATA
With CONSULT-II MT
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”. AT

AX

SU

BR

SEF652Y
ST
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0174 detected?
Is it difficult to start engine? RS
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”. BT
3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 5 seconds at idle speed.
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure 1st trip DTC P0100 is displayed. HA
6. Erase the 1st trip DTC memory. Refer to “How to Erase Emission-related Diagnostic Information”, EC-55.
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed. SC
Is the 1st trip DTC P0171 or P0174 detected?
Is it difficult to start engine?
Yes or No EL
Yes © Perform trouble diagnosis for DTC P0171, P0174. Refer to EC-247.
No © GO TO 3. IDX

EC-215
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK HEATED OXYGEN SENSOR 2 (REAR) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 2 (rear) harness protector color.

SEF154Z
3. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.

SEF467WB
4. Disconnect ECM harness connector.
5. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.
Refer to Wiring Diagram.

MTBL0493
Continuity should exist.
6. Check harness continuity between ECM terminal or HO2S2 (rear) terminal and ground as follows.
Refer to Wiring Diagram.

MTBL0494
Continuity should not exist.
7. Also check harness for short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-216
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 2 (REAR) GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between HO2S2 (rear) terminal 4 and engine ground. GI
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power. MA
OK or NG
OK (With CONSULT-II) © GO TO 5.
EM
OK (Without CONSULT- © GO TO 6.
II)
NG © Repair open circuit or short to power in harness or connectors. LC

5 CHECK HEATED OXYGEN SENSOR 2 (REAR)

With CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
FE
3. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item with CONSULT-
II.
4. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
CL

MT

AT

AX

SEF066Y
SU
“HO2S2 (B1)/(B2)” should be above 0.56V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.54V at least once when the “FUEL INJECTION” is −25%.
CAUTION: BR
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
ST
OK or NG
OK © GO TO 9.
RS
NG © GO TO 8.

BT

HA

SC

EL

IDX

EC-217
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HEATED OXYGEN SENSOR 2 (REAR)-I

Without CONSULT
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Set voltmeter probes between ECM terminal 72 (HO2S2 bank 1 signal) or 71 (HO2S2 bank 2 signal) and engine
ground.
4. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)

SEF313XB

OK or NG
OK © GO TO 9.
NG © GO TO 7.

7 CHECK HEATED OXYGEN SENSOR 2 (REAR)-II

Idle vehicle for 10 minutes, then check voltage between the same terminals as in Test No. 6; or check voltage when coast-
ing from 80 km/h (50 MPH) in “D” position with “OD” OFF.
The voltage should go below 0.54V at least once during this procedure.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 9.
NG © GO TO 8.

8 REPLACE HEATED OXYGEN SENSOR 2 (REAR)

1. Stop vehicle and turn ignition switch “OFF”.
2. Check heated oxygen sensor 2 (rear) harness protector color.

SEF154Z
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.

© Replace malfunctioning heated oxygen sensor 2 (rear).

EC-218
 DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2 (REAR) (MAX. VOLTAGE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. GI
© INSPECTION END

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-219
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Component Description

Component Description NFEC0804

The heated oxygen sensor 2 (rear), after three way catalyst
(Manifold), monitors the oxygen level in the exhaust gas on each
bank.
Even if switching characteristics of the heated oxygen sensor 1
(front) are shifted, the air fuel ratio is controlled to stoichiometric,
by the signal from the heated oxygen sensor 2 (rear).
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
SEF327R
Under normal conditions the heated oxygen sensor 2 (rear) is not
used for engine control operation.

CONSULT-II Reference Value in Data Monitor

Mode NFEC0805
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

HO2S2 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S2 (B2)
Revving engine from idle up to
HO2S2 MNTR I Engine: After warming up
(B1) 2,000 rpm
LEAN +, RICH
HO2S2 MNTR
(B2)

On Board Diagnosis Logic NFEC0806

The heated oxygen sensor 2 (rear) has a much longer switching
time between rich and lean than the heated oxygen sensor 1
(front). The oxygen storage capacity before the three way catalyst
(Manifold) causes the longer switching time. To judge the malfunc-
tions of heated oxygen sensor 2 (rear), ECM monitors whether the
switching response of the sensor’s voltage is faster than specified
during the various driving condition such as fuel-cut.
Malfunction is detected when it takes more time for the sensor to
respond between rich and lean than the specified time.
SEF302U

EC-220
DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0807

I Harness or connectors
(The sensor circuit is open or shorted.) GI
I Heated oxygen sensor 2 (rear)
I Fuel pressure MA
I Injectors
I Intake air leaks
EM

LC
DTC Confirmation Procedure NFEC0808
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
I “COMPLETED” will appear on CONSULT-II screen when all FE
tests “COND1”, “COND2” and “COND3” are completed.
I If “DTC Confirmation Procedure ” has been previously
conducted, always turn ignition switch “OFF” and wait at least CL
10 seconds before conducting the next test.
TESTING CONDITION: MT
SEF841Y Never stop engine during this procedure. If the engine is
stopped, retry this procedure from step 2 in “Procedure for
COND1”. AT
WITH CONSULT-II NFEC0808S01
Procedure for COND1
AX
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 conds.
3) Turn ignition switch “ON” and select “HO2S2 (B1) P0139/ SU
HO2S2 (B2) P0159” of “HO2S2 (B1)/(B2)” in “DTC WORK
SUPPORT” mode with CONSULT-II.
4) Touch “START”. BR
SEF842Y
5) Start engine and let it idle for at least 30 seconds.
6) Rev engine up to 2,000 rpm 2 or 3 times quickly under no load. ST
If “COMPLETED” appears on CONSULT-II screen, go to step
2 in “Procedure for COND3”.
If “COMPLETED” does not appear on CONSULT-II screen, go RS
to the following step.
7) Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes. BT
8) When the following conditions are met, “TESTING” will be dis-
played at “COND1” on the CONSULT-II screen. Maintain the
conditions continuously until “TESTING” changes to “COM- HA
SEF843Y PLETED”. (It will take approximately 60 seconds.)
ENG SPEED 1,500 - 3,600 rpm SC
Vehicle speed Above 70 km/h (43 MPH)

COOLAN TEMP/S 70 - 105°C (158 - 221°F) EL

Selector lever Suitable position
IDX
NOTE:
I If “TESTING” is not displayed after 5 minutes, retry from
step 2 in “Procedure for COND1”.
I If “COMPLETED” already appears at “COND2” on CON-
SULT-II screen before “Procedure for COND2” is

EC-221
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
conducted, it is unnecessary to conduct step 1 in “Proce-
dure for COND2”.

Procedure for COND2

1) While driving, release accelerator pedal completely with “OD”
OFF (A/T models only) from the above condition [step 8] until
“INCOMPLETE” at “COND2” on CONSULT-II screen has
turned to “COMPLETED”. (It will take approximately 4 sec-
onds.)
NOTE:
If “COMPLETED” already appears at “COND3” on CONSULT-II
screen before “Procedure for COND3” is conducted, it is
unnecessary to conduct step 1 in “Procedure for COND3”.
SEF844Y

Procedure for COND3

1) Stop vehicle and let it idle until “INCOMPLETE” of “COND3” on
CONSULT-II screen has turned to “COMPLETED”. (It will take
a maximum of approximately 6 minutes.)
2) Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”.
If “NG” is displayed, refer to “Diagnostic Procedure”, EC-226.

SEF668Y

Overall Function Check NFEC0809

Use this procedure to check the overall function of the heated oxy-
gen sensor 2 (rear) circuit. During this check, a 1st trip DTC might
not be confirmed.
WITH GST NFEC0809S01
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeter probes between ECM terminal 72 (HO2S2 bank
SEF312XA 1 signal) or 71 (HO2S2 bank 2 signal) and engine ground.
4) Check the voltage when racing up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should change at more than 0.06V for 1 sec-
ond during this procedure.
If the voltage can be confirmed in step 4, step 5 is not
necessary.
5) Keep vehicle at idling for 10 minutes, then check the voltage.
Or check the voltage when coasting from 80 km/h (50 MPH)
in “D” position with “OD” OFF.
The voltage should change at more than 0.06V for 1 sec-
ond during this procedure.

EC-222
DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Overall Function Check (Cont’d)
6) If NG, go to “Diagnostic Procedure”, EC-226.

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-223
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0810

BANK 1 NFEC0810S01

MEC443D

SEF657XE

EC-224
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0810S02

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MEC444D
HA

SC

EL

IDX

SEF658XE

EC-225
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0811

1 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 2.

2 CLEAR THE SELF-LEARNING DATA

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”.

SEF652Y
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”.
3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 5 seconds at idle speed.
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure 1st trip DTC No. 0100 is displayed.
6. Erase the 1st trip DTC memory. Refer to “How to Erase Emission-related Diagnostic Information”, EC-55.
7. Make sure DTC No. 0000 is displayed.
8. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?
Yes or No
Yes © Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-247,
EC-255.
No © GO TO 3.

EC-226
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK HEATED OXYGEN SENSOR 2 (REAR) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Check heated oxygen sensor 2 (rear) harness protector color.

MA

EM

LC

SEF154Z
3. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.
FE

CL

MT

AT
SEF467WB
4. Disconnect ECM harness connector.
5. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.
AX
Refer to Wiring Diagram.
SU

BR
MTBL0495
Continuity should exist. ST
6. Check harness continuity between ECM terminal or HO2S2 (rear) terminal and ground as follows.
Refer to Wiring Diagram.
RS

BT
MTBL0496
Continuity should not exist. HA
7. Also check harness for short to power.
OK or NG
SC
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.
EL

IDX

EC-227
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 2 (REAR) GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between HO2S2 (rear) terminal 4 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK (With CONSULT-II) © GO TO 5.
OK (Without CONSULT- © GO TO 6.
II)
NG © Repair open circuit or short to power in harness or connectors

5 CHECK HEATED OXYGEN SENSOR 2 (REAR)

With CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item with CONSULT-
II.
4. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.

SEF066Y
“HO2S2 (B1)/(B2)” should be above 0.56V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.54V at least once when the “FUEL INJECTION” is −25%.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 9.
NG © GO TO 8.

EC-228
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HEATED OXYGEN SENSOR 2 (REAR)-I

Without CONSULT-II GI
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Set voltmeter probes between ECM terminal 72 (HO2S2 bank 1 signal) or 71 (HO2S2 bank 2 signal) and engine MA
ground.
4. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
EM

LC

FE

SEF313XB
CL
OK or NG
OK © GO TO 9.
MT
NG © GO TO 7.

7 CHECK HEATED OXYGEN SENSOR 2 (REAR)-II

AT
Idle vehicle for 10 minutes, then check voltage between the same terminals as in Test No. 6; or check voltage when coast-
ing from 80 km/h (50 MPH) in “D” position with “OD” OFF. AX
The voltage should go below 0.54V at least once during this procedure.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a SU
hard surface such as a concrete floor; use a new one.
OK or NG
BR
OK © GO TO 9.
NG © GO TO 8.
ST
8 REPLACE HEATED OXYGEN SENSOR 2 (REAR)
1. Stop vehicle and turn ignition switch “OFF”. RS
2. Check heated oxygen sensor 2 (rear) harness protector color.

BT

HA

SC

EL
SEF154Z
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool IDX
J-43897-18 or J-43897-12 and approved anti-seize lubricant.

© Replace malfunctioning heated oxygen sensor 2 (rear).

EC-229
 DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2 (REAR) (RESPONSE
MONITORING) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-230
 DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Component Description

Component Description NFEC0812

The heated oxygen sensor 2 (rear), after three way catalyst
(Manifold), monitors the oxygen level in the exhaust gas on each GI
bank.
Even if switching characteristics of the heated oxygen sensor 1
(front) are shifted, the air fuel ratio is controlled to stoichiometric, MA
by the signal from the heated oxygen sensor 2 (rear).
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner EM
conditions.
Under normal conditions the heated oxygen sensor 2 (rear) is not
SEF327R
used for engine control operation. LC

FE

CL

MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0813
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
HO2S2 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S2 (B2) SU
Revving engine from idle up to
HO2S2 MNTR I Engine: After warming up
(B1) 2,000 rpm
LEAN +, RICH BR
HO2S2 MNTR
(B2)

ST

RS

BT

HA

On Board Diagnosis Logic NFEC0814

SC
The heated oxygen sensor 2 (rear) has a much longer switching
time between rich and lean than the heated oxygen sensor 1
(front). The oxygen storage capacity before the three way catalyst EL
(Manifold) causes the longer switching time. To judge the malfunc-
tions of heated oxygen sensor 2 (rear), ECM monitors whether the
voltage is unusually high during the various driving condition such IDX
as fuel-cut.
Malfunction is detected when an excessively high voltage from the
sensor is sent to ECM.
SEF305UA

EC-231
 DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0815

I Harness or connectors
(The sensor circuit is open or shorted.)
I Heated oxygen sensor 2 (rear)

DTC Confirmation Procedure NFEC0816

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
WITH CONSULT-II NFEC0816S01
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
SEF189Y
with CONSULT-II.
2) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
3) Stop vehicle with engine running.
4) Let engine idle for 1 minute.
5) Maintain the following conditions for at least 5 consecutive
seconds.
ENG SPEED 1,300 - 3,100 rpm

VHCL SPEED SE 64 - 130 km/h (40 - 80 MPH)

B/FUEL SCHDL 0.5 - 6.4 msec

COOLAN TEMP/S 70 - 100°C (158 - 212°F)

Selector lever Suitable position

6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,

EC-236.

Overall Function Check NFEC0817

Use this procedure to check the overall function of the heated oxy-
gen sensor 2 (rear) circuit. During this check, a 1st trip DTC might
not be confirmed.
WITH GST NFEC0817S01
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeter probes between ECM terminal 72 (HO2S2 bank
SEF312XA 1 signal) or 71 (HO2S2 bank 2 signal) and engine ground.

EC-232
DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Overall Function Check (Cont’d)
4) Check the voltage when racing up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.) GI
The voltage should be below 1.4V during this procedure.
5) If NG, go to “Diagnostic Procedure”, EC-236.
MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-233
 DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0818

BANK 1 NFEC0818S01

MEC443D

SEF657XE

EC-234
 DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0818S02

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MEC444D
HA

SC

EL

IDX

SEF658XE

EC-235
 DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0819

1 INSPECTION START
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X
3. Check heated oxygen sensor 2 (rear) harness protector color.

SEF154Z
4. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.

SEF467WB
5. Disconnect ECM harness connector.
© GO TO 2.

EC-236
 DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK HEATED OXYGEN SENSOR 2 (REAR) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows. GI
Refer to Wiring Diagram.

MA

EM
MTBL0497
Continuity should exist.
2. Check harness continuity between ECM terminal or HO2S2 (rear) terminal and ground as follows. LC
Refer to Wiring Diagram.

FE
MTBL0498
Continuity should not exist.
3. Also check harness for short to power. CL
OK or NG
OK © GO TO 3. MT
NG © Repair open circuit or short to ground or short to power in harness or connectors.
AT
3 CHECK HEATED OXYGEN SENSOR 2 (REAR) GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between HO2S2 (rear) terminal 4 and engine ground. AX
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power. SU
OK or NG
OK © GO TO 4. BR
NG © Repair open circuit or short to power in harness or connectors.

ST
4 CHECK HEATED OXYGEN SENSOR 2 (REAR) CONNECTORS FOR WATER
Check heated oxygen sensor 2 (rear) connector and harness connector for water.
Water should not exist. RS
OK or NG
OK (With CONSULT-II) © GO TO 5. BT
OK (Without CONSULT- © GO TO 6.
II)
HA
NG © Repair or replace harness or connectors.

SC

EL

IDX

EC-237
 DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK HEATED OXYGEN SENSOR 2 (REAR)

With CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item with CONSULT-
II.
4. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.

SEF066Y
“HO2S2 (B1)/(B2)” should be above 0.56V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.54V at least once when the “FUEL INJECTION” is −25%.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 9.
NG © GO TO 8.

6 CHECK HEATED OXYGEN SENSOR 2 (REAR)-I

Without CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Set voltmeter probes between ECM terminal 72 (HO2S2 bank 1 signal) or 71 (HO2S2 bank 2 signal) and engine
ground.
4. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)

SEF313XB

OK or NG
OK © GO TO 9.
NG © GO TO 7.

EC-238
 DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH
VOLTAGE) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK HEATED OXYGEN SENSOR 2 (REAR)-II

Idle vehicle for 10 minutes, then check voltage between the same terminals as in Test No. 6; or check voltage when coast- GI
ing from 80 km/h (50 MPH) in “D” position with “OD” OFF.
The voltage should go below 0.54V at least once during this procedure.
CAUTION: MA
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG EM
OK © GO TO 9.
NG © GO TO 8. LC

8 REPLACE HEATED OXYGEN SENSOR 2 (REAR)

1. Stop vehicle and turn ignition switch “OFF”.
2. Check heated oxygen sensor 2 (rear) harness protector color.
FE

CL

MT

AT
SEF154Z
CAUTION: AX
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.
SU
© Replace malfunctioning heated oxygen sensor 2 (rear).

BR
9 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
ST
© INSPECTION END

RS

BT

HA

SC

EL

IDX

EC-239
 DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER
(REAR) WITH EURO-OBD
Description

Description NFEC0820
SYSTEM DESCRIPTION NFEC0820S01

Sensor Input Signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Heated oxygen sensor Heated oxygen sensor
Engine speed
Crankshaft position sensor (REF) 2 heater (rear) control 2 heater (rear)

The ECM performs ON/OFF control of the heated oxygen sensor 2 heater (rear) corresponding to the engine
speed.
OPERATION NFEC0820S02

Engine speed rpm Heated oxygen sensor 2 heater (rear)

Above 3,600 OFF

Below 3,600 ON

CONSULT-II Reference Value in Data Monitor

Mode NFEC0821
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Ignition switch: ON (Engine stopped)

OFF
HO2S2 HTR (B1) I Engine is running above 3,600 rpm.
HO2S2 HTR (B2) I Engine is running below 3,600 rpm after driving for 2 minutes at a
ON
speed of 70 km/h (43 MPH) or more.

On Board Diagnosis Logic NFEC0822

Malfunction is detected when the current amperage in the heated
oxygen sensor 2 heater (rear) circuit is out of the normal range.
[An improper voltage drop signal is sent to ECM through the heated
oxygen sensor 2 heater (rear).]

Possible Cause NFEC0823

I Harness or connectors
[The heated oxygen sensor 2 heater (rear) circuit is open or
shorted.]
I Heated oxygen sensor 2 heater (rear)

EC-240
DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER
(REAR) WITH EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0824

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, GI
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
MA
Before performing the following procedure, confirm that bat-
tery voltage is between 10.5V and 16V at idle. EM
WITH CONSULT-II NFEC0824S01
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
SEF058Y
with CONSULT-II. LC
2) Start engine.
3) Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes.
4) Stop vehicle and let engine idle for at least 6 seconds.
5) If 1st trip DTC is detected, go to “Diagnostic Procedure”, FE
EC-244.
WITH GST NFEC0824S02
CL
1) Start engine.
2) Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes. MT
3) Stop vehicle and let engine idle for at least 6 seconds.
4) Turn ignition switch “OFF” and wait at least 10 seconds. AT
5) Start engine.
6) Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes. AX
7) Stop vehicle and let engine idle for at least 6 seconds.
8) Select “MODE 3” with GST. SU
9) If DTC is detected, go to “Diagnostic Procedure”, EC-244.
I When using GST, “DTC Confirmation Procedure” should
be performed twice as much as when using CONSULT-II BR
because GST cannot display MODE 7 (1st trip DTC) con-
cerning this diagnosis. Therefore, using CONSULT-II is
recommended. ST

RS

BT

HA

SC

EL

IDX

EC-241
 DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER
(REAR) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0825

BANK 1 NFEC0825S01

MEC445D

SEF659XE

EC-242
 DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER
(REAR) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0825S02

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MEC446D
HA

SC

EL

IDX

SEF660XE

EC-243
 DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER
(REAR) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0826

1 CHECK HEATED OXYGEN SENSOR 2 (REAR) POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 2 (rear) harness protector color.

SEF154Z
3. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.

SEF467WB
4. Turn ignition switch “ON”.
5. Check voltage between HO2S2 (rear) terminal 3 and ground.

SEF314X

OK or NG
OK © GO TO 3.
NG © GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connector M19
I 15A fuse
I Harness for open or short between heated oxygen sensor 2 (rear) and fuse
© Repair harness or connectors.

EC-244
 DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER
(REAR) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK HEATED OXYGEN SENSOR 2 (REAR) OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.
Refer to Wiring Diagram. MA

EM

MTBL0499 LC
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors. FE

4 CHECK HEATED OXYGEN SENSOR 2 HEATER (REAR) CL

Check the resistance between HO2S2 (rear) terminals as follows.
MT

AT

AX

SU
SEF315X
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a BR
hard surface such as a concrete floor; use a new one.
OK or NG ST
OK © GO TO 6.
NG © GO TO 5.
RS
5 REPLACE HEATED OXYGEN SENSOR 2 (REAR)
BT
Check heated oxygen sensor 2 (rear) harness protector color.

HA

SC

EL

SEF154Z
IDX
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.
© Replace malfunctioning heated oxygen sensor 2 (rear).

EC-245
 DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER
(REAR) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-246
DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN) WITH EURO-OBD
On Board Diagnosis Logic

On Board Diagnosis Logic NFEC0827

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual
mixture ratio can be brought closely to the theoretical mixture ratio GI
based on the mixture ratio feedback signal from the heated oxygen
sensor 1 (front). The ECM calculates the necessary compensation
to correct the offset between the actual and the theoretical ratios. MA
In case the amount of the compensation value is extremely large
(The actual mixture ratio is too lean.), the ECM judges the condi-
tion as the fuel injection system malfunction and light up the MIL EM
(2 trip detection logic).
Sensor Input Signal to ECM ECM function Actuator LC
Density of oxygen in exhaust gas Fuel injection con-
Heated oxygen sensor 1 (front) Injectors
(Mixture ratio feedback signal) trol

Malfunction is detected when fuel injection system does not oper-

ate properly, the amount of mixture ratio compensation is too large. FE
(The mixture ratio is too lean.)

CL

MT
Possible Cause NFEC0828
I Intake air leaks AT
I Heated oxygen sensor 1 (front)
I Injectors AX
I Exhaust gas leaks
I Incorrect fuel pressure
I Lack of fuel SU
I Mass air flow sensor
BR

DTC Confirmation Procedure NFEC0829 ST

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds RS
before conducting the next test.
WITH CONSULT-II NFEC0829S01 BT
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Turn ignition switch “ON” and select “SELF-LEARNING CONT” HA
SEF652Y in “WORK SUPPORT” mode with CONSULT-II.
4) Clear the self-learning control coefficient by touching “CLEAR”.
5) Select “DATA MONITOR” mode with CONSULT-II. SC
6) Start engine again and let it idle for at least 10 minutes.
The 1st trip DTC P0171 or P0174 should be detected at this EL
stage, if a malfunction exists. If so, go to “Diagnostic
Procedure”, EC-251.
7) If it is difficult to start engine at step 6, the fuel injection sys- IDX
tem has a malfunction, too.
8) Crank engine while depressing accelerator pedal. If engine
starts, go to “Diagnostic Procedure”, EC-251. If engine does
not start, check exhaust and intake air leak visually.

EC-247
 DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN) WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
WITH GST NFEC0829S02
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Disconnect mass air flow sensor harness connector. Then
restart and run engine for at least 5 seconds at idle speed.
4) Stop engine and reconnect mass air flow sensor harness con-
nector.
5) Select “MODE 7” with GST. Make sure 1st trip DTC P0100 is
detected.
6) Select “MODE 4” with GST and erase the 1st trip DTC P0100.
SEC139C
7) Start engine again and let it idle for at least 10 minutes.
8) Select “MODE 7” with GST. The 1st trip DTC P0171 or P0174
should be detected at this stage, if a malfunction exists. If so,
go to “Diagnostic Procedure”, EC-251.
9) If it is difficult to start engine at step 7, the fuel injection sys-
tem has a malfunction.
10) Crank engine while depressing accelerator pedal. If engine
starts, go to “Diagnostic Procedure”, EC-251. If engine does
not start, check exhaust and intake air leak visually.

EC-248
DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0830

BANK 1 NFEC0830S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC447D

EC-249
 DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0830S02

MEC448D

EC-250
DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0831

1 CHECK EXHAUST AIR LEAK GI

1. Start engine and run it at idle.
2. Listen for an exhaust air leak before three way catalyst (Manifold).
MA

EM

LC

SEF099P
FE
OK or NG
OK © GO TO 2.
CL
NG © Repair or replace.

2 CHECK FOR INTAKE AIR LEAK

MT
Listen for an intake air leak after the mass air flow sensor.
OK or NG AT
OK © GO TO 3.
NG © Repair or replace. AX

3 CHECK HEATED OXYGEN SENSOR 1 (FRONT) CIRCUIT FOR OPEN AND SHORT SU
1. Turn ignition switch “OFF”.
2. Disconnect corresponding heated oxygen sensor 1 (front) harness connector.
3. Disconnect ECM harness connector. BR
4. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows.
Refer to Wiring Diagram.
ST

RS

MTBL0500 BT
Continuity should exist.
5. Check harness continuity between ECM terminal or HO2S1 (front) terminal and ground as follows.
Refer to Wiring Diagram. HA

SC

MTBL0501 EL
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
IDX
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-251
 DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK FUEL PRESSURE

1. Release fuel pressure to zero. Refer to EC-36.
2. Install fuel pressure gauge and check fuel pressure. Refer to EC-36.
At idling:
When fuel pressure regulator valve vacuum hose is connected.
235 kPa (2.35 bar, 2.4 kg/cm2, 34 psi)
When fuel pressure regulator valve vacuum hose is disconnected.
294 kPa (2.94 bar, 3.0 kg/cm2, 43 psi)
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Fuel pump and circuit (Refer to EC-427.)
I Fuel pressure regulator (Refer to EC-37.)
I Fuel lines (Refer to MA-18, “Checking Fuel Lines”.)
I Fuel filter for clogging
© Repair or replace.

6 CHECK MASS AIR FLOW SENSOR

With CONSULT-II
1. Install all removed parts.
2. Check “MASS AIR FLOW” in “DATA MONITOR” mode with CONSULT-II.
2.0 - 6.0 g·m/sec: at idling
7.0 - 20.0 g·m/sec: at 2,500 rpm

With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in MODE 1 with GST.
2.0 - 6.0 g·m/sec: at idling
7.0 - 20.0 g·m/sec: at 2,500 rpm
OK or NG
OK © GO TO 7.
NG © Check connectors for rusted terminals or loose connections in the mass air flow sensor
circuit or engine grounds. Refer to EC-125.

EC-252
DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK FUNCTION OF INJECTORS

With CONSULT-II GI
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
MA

EM

LC

SEF070Y
3. Make sure that each circuit produces a momentary engine speed drop. FE
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound. CL

MT

AT

AX

MEC703B SU
Clicking noise should be heard.
OK or NG BR
OK © GO TO 8.
NG © Perform trouble diagnosis for “INJECTORS”, EC-417.
ST

RS

BT

HA

SC

EL

IDX

EC-253
 DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK INJECTOR
1. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
2. Turn ignition switch “OFF”.
3. Disconnect injector harness connectors on bank 2 (for DTC P0171), bank 1 (for DTC P0174).
4. Remove injector gallery assembly. Refer to EC-38.
Keep fuel hose and all injectors connected to injector gallery.
The injector harness connectors on bank 1 (for DTC P0171), bank 2 (for DTC P0174) should remain connected.
5. Disconnect all ignition coil harness connectors.
6. Prepare pans or saucers under each injector.
7. Crank engine for about 3 seconds. Make sure that fuel sprays out from injectors.

SEF595Q
Fuel should be sprayed evenly for each injector.
OK or NG
OK © GO TO 9.
NG © Replace injectors from which fuel does not spray out. Always replace O-ring with new
ones.

9 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-254
DTC P0172 (BANK 1), P0175 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(RICH) WITH EURO-OBD
On Board Diagnosis Logic

On Board Diagnosis Logic NFEC0832

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual
mixture ratio can be brought closely to the theoretical mixture ratio GI
based on the mixture ratio feedback signal from the heated oxygen
sensor 1 (front). The ECM calculates the necessary compensation
to correct the offset between the actual and the theoretical ratios. MA
In case the amount of the compensation value is extremely large
(The actual mixture ratio is too rich.), the ECM judges the condi-
tion as the fuel injection system malfunction and light up the MIL EM
(2 trip detection logic).
Sensor Input Signal to ECM ECM function Actuator LC
Density of oxygen in exhaust gas Fuel injection
Heated oxygen sensor 1 (front) Injectors
(Mixture ratio feedback signal) control

Malfunction is detected when fuel injection system does not oper-

ate properly, the amount of mixture ratio compensation is too large. FE
(The mixture ratio is too rich.)

CL

MT
Possible Cause NFEC0833
I Heated oxygen sensor 1 (front) AT
I Injectors
I Exhaust gas leaks AX
I Incorrect fuel pressure
I Mass air flow sensor
SU

BR

DTC Confirmation Procedure NFEC0834 ST

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds RS
before conducting the next test.
WITH CONSULT-II NFEC0834S01 BT
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Turn ignition switch “ON” and select “SELF-LEARNING CONT” HA
SEF652Y in “WORK SUPPORT” mode with CONSULT-II.
4) Clear the self-learning control coefficient by touching “CLEAR”.
5) Select “DATA MONITOR” mode with CONSULT-II. SC
6) Start engine again and let it idle for at least 10 minutes.
The 1st trip DTC P0172, P0175 should be detected at this EL
stage, if a malfunction exists. If so, go to “Diagnostic
Procedure”, EC-259.
7) If it is difficult to start engine at step 6, the fuel injection sys- IDX
tem has a malfunction, too.
8) Crank engine while depressing accelerator pedal.
If engine starts, go to “Diagnostic Procedure”, EC-259. If
engine does not start, remove ignition plugs and check for
fouling, etc.
EC-255
 DTC P0172 (BANK 1), P0175 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(RICH) WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
WITH GST NFEC0834S02
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Disconnect mass air flow sensor harness connector. Then
restart and run engine for at least 5 seconds at idle speed.
4) Stop engine and reconnect mass air flow sensor harness con-
nector.
5) Select “MODE 7” with GST. Make sure 1st trip DTC P0100 is
detected.
6) Select “MODE 4” with GST and erase the 1st trip DTC P0100.
SEC139C
7) Start engine again and let it idle for at least 10 minutes.
8) Select “MODE 7” with GST. The 1st trip DTC P0172 or P0175
should be detected at this stage, if a malfunction exists. If so,
go to “Diagnostic Procedure”, EC-259.
9) If it is difficult to start engine at step 7, the fuel injection sys-
tem has a malfunction.
10) Crank engine while depressing accelerator pedal.
If engine starts, go to “Diagnostic Procedure”, EC-259. If
engine does not start, check exhaust and intake air leak visu-
ally.

EC-256
DTC P0172 (BANK 1), P0175 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(RICH) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0835

BANK 1 NFEC0835S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC447D

EC-257
 DTC P0172 (BANK 1), P0175 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(RICH) WITH EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0835S02

MEC448D

EC-258
DTC P0172 (BANK 1), P0175 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(RICH) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0836

1 CHECK EXHAUST AIR LEAK GI

1. Start engine and run it at idle.
2. Listen for an exhaust air leak before three way catalyst (Manifold).
MA

EM

LC

SEF099P
FE
OK or NG
OK © GO TO 2.
CL
NG © Repair or replace.

2 CHECK FOR INTAKE AIR LEAK

MT
Listen for an intake air leak after the mass air flow sensor.
OK or NG AT
OK © GO TO 3.
NG © Repair or replace. AX

3 CHECK HEATED OXYGEN SENSOR 1 (FRONT) CIRCUIT FOR OPEN AND SHORT SU
1. Turn ignition switch “OFF”.
2. Disconnect corresponding heated oxygen sensor 1 (front) harness connector.
3. Disconnect ECM harness connector. BR
4. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows.
Refer to Wiring Diagram.
ST

RS

MTBL0502 BT
Continuity should exist.
5. Check harness continuity between ECM terminal or HO2S1 (front) terminal and ground as follows.
Refer to Wiring Diagram. HA

SC

MTBL0503 EL
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
IDX
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-259
 DTC P0172 (BANK 1), P0175 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(RICH) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK FUEL PRESSURE

1. Release fuel pressure to zero. Refer to EC-36.
2. Install fuel pressure gauge and check fuel pressure. Refer to EC-36.
At idling:
When fuel pressure regulator valve vacuum hose is connected.
235 kPa (2.34 bar, 2.4 kg/cm2, 34 psi)
When fuel pressure regulator valve vacuum hose is disconnected.
294 kPa (2.94 bar, 3.0 kg/cm2, 43 psi)
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Fuel pump and circuit (Refer to EC-427.)
I Fuel pressure regulator (Refer to EC-37.)
© Repair or replace.

6 CHECK MASS AIR FLOW SENSOR

With CONSULT-II
1. Install all removed parts.
2. Check “MASS AIR FLOW” in “DATA MONITOR” mode with CONSULT-II.
2.0 - 6.0 g·m/sec: at idling
7.0 - 20.0 g·m/sec: at 2,500 rpm

With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in MODE 1 with GST.
2.0 - 6.0 g·m/sec: at idling
7.0 - 20.0 g·m/sec: at 2,500 rpm
OK or NG
OK © GO TO 7.
NG © Check connectors for rusted terminals or loose connections in the mass air flow sensor
circuit or engine grounds. Refer to EC-125.

EC-260
DTC P0172 (BANK 1), P0175 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(RICH) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK FUNCTION OF INJECTORS

With CONSULT-II GI
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
MA

EM

LC

SEF070Y
3. Make sure that each circuit produces a momentary engine speed drop. FE
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound. CL

MT

AT

AX

MEC703B SU
Clicking noise should be heard.
OK or NG BR
OK © GO TO 8.
NG © Perform trouble diagnosis for “INJECTORS”, EC-417.
ST

8 CHECK INJECTOR
RS
1. Remove injector assembly. Refer to EC-38.
Keep fuel hose and all injectors connected to injector gallery.
2. Confirm that the engine is cooled down and there are no fire hazards near the vehicle. BT
3. Disconnect injector harness connectors bank 2 (for DTC P0172), bank 1 (for P0175).
The injector harness connectors on bank 1 (for P0172), bank 2 (for P0175) should remain connected.
4. Disconnect all ignition coil harness connectors. HA
5. Prepare pans or saucers under each injectors.
6. Crank engine for about 3 seconds.
Make sure fuel does not drip from injector.
SC
OK or NG
OK (Does not drip.) © GO TO 9.
EL
NG (Drips.) © Replace the injectors from which fuel is dripping. Always replace O-ring with new one.

IDX
9 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-261
 DTC P0180 FUEL TANK TEMPERATURE
SENSOR WITH EURO-OBD
Component Description

Component Description NFEC0837

The fuel tank temperature sensor is used to detect the fuel tem-
perature inside the fuel tank. The sensor modifies a voltage signal
from the ECM. The modified signal returns to the ECM as the fuel
temperature input. The sensor uses a thermistor which is sensitive
to the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

SEF263X

<Reference data>
Fuel temperature
Voltage* V Resistance kΩ
°C (°F)

20 (68) 3.5 2.3 - 2.7

50 (122) 2.2 0.79 - 0.90

*: These data are reference values and are measured between ECM terminal 92
(Fuel tank temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/
SEF012P
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.

On Board Diagnosis Logic NFEC0838

Malfunction is detected when an excessively high or low voltage is
sent to ECM, rationally incorrect voltage is sent to ECM, compared
with the voltage signals from engine coolant temperature sensor
and intake air temperature sensor.

Possible Cause NFEC0839

I Harness or connectors
(The sensor circuit is open or shorted.)
I Fuel tank temperature sensor

EC-262
DTC P0180 FUEL TANK TEMPERATURE
SENSOR WITH EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0840

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, GI
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
MA

EM

LC
WITH CONSULT-II NFEC0840S01
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 10 seconds.
If the result is NG, go to “Diagnostic Procedure”, EC-265. FE
If the result is OK, go to following step.
4) Check “COOLAN TEMP/S” value.
If “COOLAN TEMP/S” is less than 60°C (140°F), the result will CL
be OK.
If “COOLAN TEMP/S” is above 60°C (140°F), go to the follow-
SEF174Y ing step. MT
5) Cool engine down until “COOLAN TEMP/S” is less than 60°C
(140°F).
AT
6) Wait at least 10 seconds.
7) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-265. AX

SU

BR

WITH GST
Follow the procedure “With CONSULT-II” above.
NFEC0840S02 ST

RS

BT

HA

SC

EL

IDX

EC-263
 DTC P0180 FUEL TANK TEMPERATURE
SENSOR WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0841

MEC461D

EC-264
 DTC P0180 FUEL TANK TEMPERATURE
SENSOR WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0842

1 CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT GI

1. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit and fuel pump harness connector.
MA

EM

LC

SEF263X
3. Turn ignition switch “ON”. FE
4. Check voltage between fuel level sensor unit and fuel pump terminal 4 and ground with CONSULT-II or tester.

CL

MT

AT

AX
SEF586X

OK or NG
SU
OK © GO TO 3.
NG © GO TO 2.
BR
2 DETECT MALFUNCTIONING PART
Check the following. ST
I Harness connectors B3, M6 or B2, M2
I Harness connectors M81, F49
I Harness for open or short between ECM and fuel level sensor unit and fuel pump RS
© Repair harness or connector.
BT
3 CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. HA
2. Check harness continuity between fuel level sensor unit and fuel pump terminal 5 and body ground. Refer to Wiring
Diagram.
Continuity should exist. SC
3. Also check harness for short to power.
OK or NG
EL
OK © GO TO 4.
NG © Repair open circuit or short to power in harness or connectors.
IDX

EC-265
 DTC P0180 FUEL TANK TEMPERATURE
SENSOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK FUEL TANK TEMPERATURE SENSOR

1. Remove fuel level sensor unit.
2. Check resistance between fuel level sensor unit and fuel pump terminals 4 and 5 by heating with hot water or heat gun
as shown in the figure.

SEF587X

OK or NG
OK © GO TO 5.
NG © Replace fuel level sensor unit.

5 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-266
 DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE WITH EURO-OBD
On Board Diagnosis Logic

On Board Diagnosis Logic NFEC0843

When a misfire occurs, engine speed will fluctuate (vary). If the engine speed fluctuates enough to cause the
CKP sensor (POS) signal to vary, ECM can determine that a misfire is occurring. GI
Sensor Input Signal to ECM ECM function

Crankshaft position sensor (POS) Engine speed On board diagnosis of misfire

MA

The misfire detection logic consists of the following two conditions.

EM
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the first trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to
overheating, the MIL will blink. LC
When a misfire condition occurs, the ECM monitors the CKP sensor (POS) signal every 200 engine revo-
lutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again. FE
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not cause damage to the TWC (but will affect vehicle emissions), the MIL
will only light when the misfire is detected on a second trip. During this condition, the ECM monitors the CL
CKP sensor (POS) signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on-multiple cylinders.
Malfunction is detected when multiple cylinders misfire, No. 1 cylinder misfires, No. 2 cylinder misfires, No. 3 MT
cylinder misfires, No. 4 cylinder misfires, No. 5 cylinder misfires and No. 6 cylinder misfires.
AT

AX

SU

BR

Possible Cause NFEC0844 ST

I Improper spark plug
I Insufficient compression
I Incorrect fuel pressure RS
I The injector circuit is open or shorted
I Injectors BT
I Intake air leak
I The ignition secondary circuit is open or shorted
I Lack of fuel HA
I Drive plate or flywheel
I Heated oxygen sensor 1 (front)
SC

EL

IDX

EC-267
 DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE WITH EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0845

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
WITH CONSULT-II NFEC0845S01
1) Turn ignition switch “ON”, and select “DATA MONITOR” mode
SEF213Y
with CONSULT-II.
2) Start engine and warm it up to normal operating temperature.
3) Turn ignition switch “OFF” and wait at least 10 seconds.
4) Start engine again and drive at 1,500 to 3,000 rpm for at least
3 minutes.
Hold the accelerator pedal as steady as possible.
NOTE:
Refer to the freeze frame data for the test driving conditions.
5) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-268.
WITH GST NFEC0845S02
Follow the procedure “With CONSULT-II” above.
Diagnostic Procedure NFEC0846

1 CHECK FOR INTAKE AIR LEAK

1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
OK or NG
OK © GO TO 2.
NG © Discover air leak location and repair.

2 CHECK FOR EXHAUST SYSTEM CLOGGING

1. Stop engine and visually check exhaust tube, three way catalyst (Manifold) and muffler for dents.
OK or NG
OK © GO TO 3.
NG © Repair or replace it.

EC-268
 DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 PERFORM POWER BALANCE TEST

With CONSULT-II GI
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.

MA

EM

LC

SEF190Y
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-II FE
When disconnecting each injector harness connector one at a time, is there any cylinder which does not produce a
momentary engine speed drop?
CL

MT

AT

AX
SEF281XA

Yes or No
SU
Yes © GO TO 4.
No © GO TO 7. BR

4 CHECK INJECTOR ST
Does each injector make an operating sound at idle?
RS

BT

HA

SC
MEC703B

Yes or No EL
Yes © GO TO 5.
No © Check injector(s) and circuit(s). Refer to EC-417. IDX

EC-269
 DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK IGNITION SPARK

1. Disconnect ignition wire from spark plug.
2. Connect a known good spark plug to the ignition wire.
3. Place end of spark plug against a suitable ground and crank engine.
4. Check for spark.

SEF575Q

OK or NG
OK © GO TO 6.
NG © Check ignition coil, power transistor and their circuits. Refer to “DTC P1320 IGNITION
SIGNAL”, EC-353.

6 CHECK SPARK PLUGS

Remove the spark plugs and check for fouling, etc.

SEF156I

OK or NG
OK © GO TO 7.
NG © Repair or replace spark plug(s) with standard type one(s). For spark plug type, refer to
MA-13, “ENGINE MAINTENANCE”.

7 CHECK COMPRESSION PRESSURE

Check compression pressure. Refer to EM-12, “Measurement of Compression Pressure”.
Standard:
1,275 kPa (12.75 bar, 13.0 kg/cm2, 185 psi)/300 rpm
Minimum:
981 kPa (9.81 bar, 10.0 kg/cm2, 142 psi)/300 rpm
Difference between each cylinder:
98 kPa (0.98 bar, 1.0 kg/cm2, 14 psi)/300 rpm
OK or NG
OK © GO TO 8.
NG © Check pistons, piston rings, valves, valve seats and cylinder head gaskets.

EC-270
 DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK FUEL PRESSURE

1. Install all removed parts. GI
2. Release fuel pressure to zero. Refer to EC-36.
3. Install fuel pressure gauge and check fuel pressure. Refer to EC-36.
At idle: MA
Approx. 235 kPa (2.35 bar, 2.4 kg/cm2, 34 psi)
OK or NG
OK © GO TO 10.
EM
NG © GO TO 9.
LC
9 DETECT MALFUNCTIONING PART
Check the following.
I Fuel pump and circuit (Refer to EC-427.)
I Fuel pressure regulator (Refer to EC-37.)
I Fuel lines (Refer to MA-18, “Checking Fuel Lines”.) FE
I Fuel filter for clogging
© Repair or replace.
CL
10 CHECK IGNITION TIMING
MT
Check the following items. Refer to “Basic Inspection”, EC-81.

AT

AX

SU
MTBL0662

OK or NG BR
OK (With CONSULT-II) © GO TO 11.
OK (Without CONSULT- © GO TO 12. ST
II)
NG © Follow the “Basic Inspection”.
RS

BT

HA

SC

EL

IDX

EC-271
 DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

11 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (B1)/(B2)

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” in “DATA MONITOR” mode with CONSULT-II, and select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR
(B1)/(B2)”.
3. Hold engine speed at 2,000 rpm under no load during the following steps.
4. Touch “RECORD” on CONSULT-II screen.

SEF646Y
5. Check the following.
I “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
5 times (cycles) are counted as shown left:

SEF647YA
I “HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
I “HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once.
I “HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

SEF648Y
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 14.
NG © GO TO 13.

EC-272
 DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

12 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (B1)/(B2)

Without CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 signal) or 62 (HO2S1 bank 2 signal) and engine
ground. MA
3. Check the following with engine speed held at 2,000 rpm constant under no load.

EM

LC

SEF967XA
FE
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one. CL
OK or NG
OK © GO TO 14. MT
NG © GO TO 13.
AT
13 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)
1. Turn ignition switch “OFF”. AX
2. Check heated oxygen sensor 1 (front) harness protector color.

SU

BR

ST

SEF505YA
RS

© Replace malfunctioning heated oxygen sensor 1 (front). BT

HA

SC

EL

IDX

EC-273
 DTC P0300 - P0306 NO. 6 - 1 CYLINDER MISFIRE, MULTIPLE CYLINDER
MISFIRE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

14 CHECK MASS AIR FLOW SENSOR

With CONSULT-II
Check mass air flow sensor signal in “DATA MONITOR” mode with CONSULT-II.
2.0 - 6.0 g·m/sec: at idling
7.0 - 20.0 g·m/sec: at 2,500 rpm

With GST
Check mass air flow sensor signal in MODE 1 with GST.
2.0 - 6.0 g·m/sec: at idling
7.0 - 20.0 g·m/sec: at 2,500 rpm
OK or NG
OK © GO TO 15.
NG © Check connectors for rusted terminals or loose connections in the mass air flow sensor
circuit or engine grounds. Refer to EC-125.

15 CHECK SYMPTOM MATRIX CHART

Check items on the rough idle symptom in “Symptom Matrix Chart”, EC-96.
OK or NG
OK © GO TO 16.
NG © Repair or replace.

16 ERASE THE 1ST TRIP DTC

Erase the 1st trip DTC from the ECM memory after performing the tests. Refer to EC-55.
Some tests may cause a 1st trip DTC to be set.
© GO TO 17.

17 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-274
DTC P0325 KNOCK SENSOR (KS) WITH EURO-OBD
Component Description

Component Description NFEC0847

The knock sensor is attached to the cylinder block. It senses
engine knocking using a piezoelectric element. A knocking vibration GI
from the cylinder block is sensed as vibrational pressure. This
pressure is converted into a voltage signal and sent to the ECM.
Freeze frame data will not be stored in the ECM for the knock MA
sensor. The MIL will not light for knock sensor malfunction.
The knock sensor has one trip detection logic.
EM

SEF332I LC
On Board Diagnosis Logic NFEC0848
Malfunction is detected when an excessively low or high voltage
from the knock sensor is sent to ECM.

FE

CL

MT
Possible Cause NFEC0849
I Harness or connectors AT
(The knock sensor circuit is open or shorted.)
I Knock sensor
AX

SU

BR

DTC Confirmation Procedure NFEC0850 ST

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds RS
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat- BT
tery voltage is more than 10V at idle.
WITH CONSULT-II NFEC0850S01 HA
SEF058Y
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II
2) Start engine and run it for at least 5 seconds at idle speed. SC
3) If DTC is detected, go to “Diagnostic Procedure”, EC-277.
WITH GST NFEC0850S02
EL
Follow the procedure “WITH CONSULT-II” above.
IDX

EC-275
 DTC P0325 KNOCK SENSOR (KS) WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0851

MEC736C

SEF663XB

EC-276
 DTC P0325 KNOCK SENSOR (KS) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0852

1 CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I GI
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminal 93 and engine ground. MA
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MΩ.
EM

LC

FE
SEF321X
4. Also check harness for short to ground and short to power. CL
OK or NG
OK © GO TO 5. MT
NG © GO TO 2.

AT
2 CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 93 and knock sensor terminal 1. Refer to Wiring Diagram. AX
Continuity should exist.
3. Also check harness for short to ground and short to power.
SU
OK or NG
OK © GO TO 4.
BR
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART ST

Check the following.
I Harness connector F8, F131 RS
I Harness for open or short between ECM and knock sensor
© Repair open circuit or short to ground or short to power in harness or connectors.
BT

HA

SC

EL

IDX

EC-277
 DTC P0325 KNOCK SENSOR (KS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK KNOCK SENSOR

Check resistance between knock sensor terminal 1 and ground.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MΩ.

SEF322X
CAUTION:
Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.
OK or NG
OK © GO TO 8.
NG © Replace knock sensor.

5 RETIGHTEN GROUND SCREWS

Loose and retighten engine ground screws.

SEF255X

© GO TO 6.

6 CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT

1. Disconnect harness connectors F8, F131.
2. Check harness continuity between harness connector F8 terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F8, F131
I Joint connectors-18
I Harness for open or short between harness connector F8 and engine ground
© Repair open circuit or short to power in harness or connectors.

EC-278
 DTC P0325 KNOCK SENSOR (KS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. GI
© INSPECTION END

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-279
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITH EURO-OBD
Component Description

Component Description NFEC0853

The crankshaft position sensor (POS) is located on the oil pan
facing the gear teeth (cogs) of the signal plate (flywheel). It detects
the crankshaft position signal (1° signal).
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the gear
teeth (cogs) will periodically change. Permeability near the sensor
also changes.
Due to the permeability change, the magnetic flux near the core is
changed. Therefore, the voltage signal generated in the coil is
SEF254P
changed.
The ECM receives the voltage signal and detects the crankshaft
position signal (1° signal).

CONSULT-II Reference Value in Data Monitor

Mode NFEC0854
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Tachometer: Connect
Almost the same speed as the
CKPS·RPM (POS) I Run engine and compare tachometer indication with the CONSULT-II
CONSULT-II value.
value.

On Board Diagnosis Logic NFEC0855

Malfunction is detected when 1° signal is not entered to ECM for
the first few seconds during engine cranking, or 1° signal is not
entered to ECM during engine running.

Possible Cause NFEC0856

I Harness or connectors
[The crankshaft position sensor (POS) circuit is open or
shorted.]
I Crankshaft position sensor (POS)
I Starter motor (Refer to EL section.)
I Starting system circuit (Refer to EL section.)
I Dead (Weak) battery

EC-280
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITH EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0857

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, GI
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
MA
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V. EM
WITH CONSULT-II NFEC0857S01
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
SEF058Y
with CONSULT-II. LC
2) Crank engine for at least two seconds.
3) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-283.

FE

CL

MT
WITH GST NFEC0857S02
Follow the procedure “With CONSULT-II” above. AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-281
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0858

MEC462D

EC-282
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITH EURO-OBD
Wiring Diagram (Cont’d)

GI

MA

EM

LC

SEF856Y FE

CL

MT
Diagnostic Procedure NFEC0859
AT
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws. AX

SU

BR

ST

SEF255X RS

© GO TO 2.
BT

HA

SC

EL

IDX

EC-283
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK CKPS (POS) POWER SUPPLY CIRCUIT

1. Disconnect harness connectors F25, F171.

SEF511WB
2. Check voltage between harness connector F25 terminal 4 and ground with CONSULT-II or tester.

SEF323X
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F25, F171
I Harness connectors E15, F18
I Harness for open or short between ECM and crankshaft position sensor (POS)
I Harness for open or short between ECM relay and crankshaft position sensor (POS)
© Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK CKPS (POS) GROUND CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between harness connector F25 terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to power in harness or connectors.

EC-284
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK CKPS (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector. GI
2. Check harness continuity between ECM terminal 85 and harness connector F25 terminal 1.
Refer to Wiring Diagram.
Continuity should exist. MA
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
EM
NG © Repair open circuit or short to ground or short to power in harness or connectors.
LC
6 CHECK CKPS (POS) SUB-HARNESS CIRCUIT FOR OPEN AND SHORT
1. Disconnect CKPS (POS) harness connector.

FE

CL

MT

SEF367Q
AT
2. Check harness continuity between CKPS (POS) terminals and harness connector F171 terminals as follows.

AX

SU
MTBL0352
Continuity should exist. BR
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 7.
ST
NG © Repair open circuit or short to ground or short to power in harness or connectors.
RS
7 CHECK CKPS (POS) INSTALLATION
Check that CKPS (POS) and HO2S1 bank 2 harness clamp are installed correctly as shown below. BT

HA

SC

EL

SEM222FE IDX
OK or NG
OK © GO TO 8.
NG © Install CKPS (POS) correctly.

EC-285
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK CRANKSHAFT POSITION SENSOR (POS)-I

1. Disconnect crankshaft position sensor (POS) harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.

SEF587P

OK or NG
OK © GO TO 9.
NG © Replace crankshaft position sensor (POS).

9 CHECK CRANKSHAFT POSITION SENSOR (POS)-II

1. Reconnect disconnected harness connectors.
2. Turn ignition switch “ON”.
3. Check voltage between ECM terminal 85 and ground by briefly touching the sensor core with a flat-bladed screwdriv-
ers.

SEF324X

OK or NG
OK © GO TO 10.
NG © Replace crankshaft position sensor (POS).

10 CHECK CKPS (POS) SHIELD CIRCUIT FOR OPEN AND SHORT

1. Disconnect harness connectors F25, F171.
2. Check harness continuity between harness connector F25 terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 12.
NG © GO TO 11.

EC-286
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

11 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness connectors F25, F171
I Joint connector-18
I Harness for open or short between harness connector F25 and engine ground MA
© Repair open circuit or short to power in harness or connectors.

EM
12 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
LC
© INSPECTION END

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-287
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITH EURO-OBD
Component Description

Component Description NFEC0860

The camshaft position sensor (PHASE) is located on the engine
front cover facing the camshaft sprocket. It detects the cylinder No.
signal.
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the
camshaft sprocket will periodically change. Permeability near the
sensor also changes.
Due to the permeability change, the magnetic flux near the core is
changed. Therefore, the voltage signal generated in the coil is
SEF252P
changed.
The ECM receives the voltage signal and detects the cylinder No.
signal.

On Board Diagnosis Logic NFEC0861

Malfunction is detected when
(Malfunction A) the cylinder No. signal is not sent to ECM for the
first few seconds during engine cranking,
(Malfunction B) the cylinder No. signal is not sent to ECM during
engine running,
(Malfunction C) the cylinder No. signal is not in the normal pattern
during engine running.

Possible Cause NFEC0862

I Harness or connectors
[The camshaft position sensor (PHASE) circuit is open or
shorted.]
I Camshaft position sensor (PHASE)
I Starter motor (Refer to SC section.)
I Starting system circuit (Refer to SC section.)
I Dead (Weak) battery

DTC Confirmation Procedure NFEC0863

NOTE:
I Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st
trip DTC cannot be confirmed, perform “PROCEDURE
FOR MALFUNCTION B AND C”.
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V at idle.

EC-288
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
PROCEDURE FOR MALFUNCTION A NFEC0863S01
With CONSULT-II
1) Turn ignition switch “ON”.
NFEC0863S0101
GI
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Crank engine for at least 2 seconds. MA
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-291.
With GST
EM
NFEC0863S0102
Follow the procedure “With CONSULT-II” above.
SEF065Y LC
PROCEDURE FOR MALFUNCTION B AND C NFEC0863S02
With CONSULT-II NFEC0863S0201
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and run it for at least 2 seconds at idle speed. FE
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-291.
CL
With GST NFEC0863S0202
Follow the procedure “With CONSULT-II” above.
SEF058Y
MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-289
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0864

MEC449D

SEF857Y

EC-290
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0865

1 CHECK STARTING SYSTEM GI

Turn ignition switch to “START” position.
Does the engine turn over?
Does the starter motor operate? MA
Yes or No
Yes © GO TO 2. EM
No © Check starting system. (Refer to SC-12, “STARTING SYSTEM”.)
LC
2 RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

FE

CL

MT

AT
SEF255X

© GO TO 3. AX

3 CHECK CMPS (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT SU
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and CMPS (PHASE) harness connector.
BR

ST

RS

BT

SEF274P
3. Check harness continuity between CMPS (PHASE) terminal 2 and ECM terminals 66, 76. Refer to Wiring Diagram. HA
Continuity should exist.
4. Also check harness for short to ground and short to power.
SC
OK or NG
OK © GO TO 4.
EL
NG © Repair open circuit or short to ground or short to power in harness or connectors.

IDX

EC-291
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK CMPS (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between CMPS (PHASE) terminal 1 and engine ground.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to power in harness or connector.

5 CHECK CAMSHAFT POSITION SENSOR (PHASE)-I

1. Loosen the fixing bolt of the camshaft position sensor (PHASE).
2. Remove the CMPS (PHASE).
3. Visually check the CMPS (PHASE) for chipping.

SEF583P

OK or NG
OK © GO TO 6.
NG © Replace camshaft position sensor (PHASE).

6 CHECK CAMSHAFT POSITION SENSOR (PHASE)-II

Check resistance between CMPS (PHASE) terminals 1 and 2 as shown below.

SEF325X

OK or NG
OK © GO TO 7.
NG © Replace camshaft position sensor (PHASE).

EC-292
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK CMPS (PHASE) SHIELD CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”. GI
2. Disconnect joint connector-18.
3. Check the following.
I Continuity between joint connector terminal 1 and ground MA
I Joint connector
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
4. Also check harness for short to power.
EM
5. Then reconnect joint connector-18.
OK or NG LC
OK © GO TO 8.
NG © Repair open circuit or short to power in harness or connectors.

8 CHECK INTERMITTENT INCIDENT FE

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END
CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-293
 DTC P0420 (BANK 1), P0430 (BANK 2) THREE WAY CATALYST
FUNCTION WITH EURO-OBD
On Board Diagnosis Logic

On Board Diagnosis Logic NFEC0866

The ECM monitors the switching frequency ratio of heated oxygen
sensor 1 (front) and heated oxygen sensors 2 (rear).
A three way catalyst (Manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2
(rear). As oxygen storage capacity decreases, the heated oxygen
sensor 2 (rear) switching frequency will increase.
When the frequency ratio of heated oxygen sensor 1 (front) and
heated oxygen sensor 2 (rear) approaches a specified limit value,
the three way catalyst (Manifold) malfunction is diagnosed.
SEF184UE
Malfunction is detected when three way catalyst (Manifold) does
not operate properly, three way catalyst (Manifold) does not have
enough oxygen storage capacity.

Possible Cause NFEC0867

I Three way catalyst (Manifold)
I Exhaust tube
I Intake air leaks
I Injectors
I Injector leaks
I Spark plug
I Improper ignition timing

EC-294
DTC P0420 (BANK 1), P0430 (BANK 2) THREE WAY CATALYST
FUNCTION WITH EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0868

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, GI
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
MA
WITH CONSULT-II NFEC0868S01
TESTING CONDITION:
I Open engine hood before conducting the following proce- EM
dure.
SEF847Y I Do not hold engine speed for more than the specified LC
minutes below.
1) Turn ignition switch “ON”.
2) Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.
3) Start engine.
4) Rev engine up to 3,000±500 rpm and hold it for 3 consecutive FE
minutes then release the accelerator pedal completely.
5) Wait 5 seconds at idle. CL
6) Rev engine up to 2,500±500 rpm and maintain it until “INCMP”
of CATALYST changes to “CMPLT” (It will take approximately
SEF848Y
5 minutes). MT
If not “CMPLT”, stop engine and cool it down to less than 70°C
(158°F) and then retest from step 1.
7) Select “SELF-DIAG RESULTS” mode with CONSULT-II. AT
8) Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-296. AX

SU

BR
SEF560X

Overall Function Check NFEC0869 ST

Use this procedure to check the overall function of the three way
catalyst (Manifold). During this check, a 1st trip DTC might not be
confirmed. RS
CAUTION:
Always drive vehicle at a safe speed.
BT
WITH GST NFEC0869S01
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes. HA
SEF329X 2) Stop vehicle with engine running.
3) Set voltmeters probes between ECM terminals 63 (HO2S1
bank 1 signal), 62 (HO2S1 bank 2 signal) and engine ground, SC
and ECM terminals 72 (HO2S2 bank 1 signal), 71 (HO2S2
bank 2 signal) and engine ground.
EL
4) Keep engine speed at 2,000 rpm constant under no load.
5) Make sure that the voltage switching frequency (high & low)
between ECM terminals 72 and engine ground, or 71 and IDX
engine ground is very less than that of ECM terminals 63 and
engine ground, or 62 and engine ground.
Switching frequency ratio = A/B
A: Heated oxygen sensor 2 (rear) voltage switching fre-
SEF330X quency

EC-295
 DTC P0420 (BANK 1), P0430 (BANK 2) THREE WAY CATALYST
FUNCTION WITH EURO-OBD
Overall Function Check (Cont’d)
B: Heated oxygen sensor 1 (front) voltage switching fre-
quency
This ratio should be less than 0.75.
If the ratio is greater than above, it means three way catalyst
(Manifold) does not operate properly. Go to “Diagnostic
Procedure”, EC-296.
NOTE:
If the voltage at ECM terminal 62 or 63 does not switch periodically
more than 5 times within 10 seconds at step 5, perform trouble
diagnosis for “DTC P0133, P0153” first. (See EC-171.)

Diagnostic Procedure NFEC0870

1 CHECK EXHAUST SYSTEM

Visually check exhaust tubes and muffler for dent.
OK or NG
OK © GO TO 2.
NG © Repair or replace.

2 CHECK EXHAUST AIR LEAK

1. Start engine and run it at idle.
2. Listen for an exhaust air leak before the three way catalyst (Manifold).

SEF099P

OK or NG
OK © GO TO 3.
NG © Repair or replace.

3 CHECK INTAKE AIR LEAK

Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK © GO TO 4.
NG © Repair or replace.

EC-296
 DTC P0420 (BANK 1), P0430 (BANK 2) THREE WAY CATALYST
FUNCTION WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK IGNITION TIMING

Check the following items. Refer to “Basic Inspection”, EC-81. GI

MA

EM

MTBL0662
LC
OK or NG
OK © GO TO 5.
NG © Follow the “Basic Inspection”.
FE
5 CHECK INJECTORS
1. Refer to WIRING DIAGRAM for Injectors, EC-418. CL
2. Stop engine and then turn ignition switch “ON”.
3. Check voltage between ECM terminals 101, 102, 103, 104, 105, 107 and ground with CONSULT-II or tester.
MT

AT

AX

SU
SEF331X

OK or NG BR
OK © GO TO 6.
NG © Perform “Diagnostic Procedure” under “INJECTOR”, EC-419. ST

RS

BT

HA

SC

EL

IDX

EC-297
 DTC P0420 (BANK 1), P0430 (BANK 2) THREE WAY CATALYST
FUNCTION WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK IGNITION SPARK

1. Turn ignition switch “OFF”.
2. Disconnect ignition coil assembly from rocker cover.
3. Connect a known-good spark plug to the ignition coil assembly.
4. Place end of spark plug against a suitable ground and crank engine.
5. Check for spark.

SEF575Q

OK or NG
OK © GO TO 7.
NG © Check ignition coil with power transistor and their circuit. Refer to “DTC P1320 IGNITION
SIGNAL”, EC-353.

7 CHECK INJECTOR
1. Turn ignition switch “OFF”.
2. Remove injector assembly.
Refer to EC-38.
Keep fuel hose and all injectors connected to injector gallery.
3. Disconnect all ignition coil harness connectors.
4. Turn ignition switch “ON”.
Make sure fuel does not drip from injector.
OK or NG
OK (Does not drip.) © GO TO 8.
NG (Drips.) © Replace the injector(s) from which fuel is dripping.

8 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
Trouble is fixed. © INSPECTION END
Trouble is not fixed. © Replace three way catalyst (Manifold).

EC-298
 DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
(CIRCUIT) WITH EURO-OBD
Description

Description NFEC0871
SYSTEM DESCRIPTION NFEC0871S01
GI
Sensor Input Signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Engine speed (POS signal) MA

Crankshaft position sensor (REF) Engine speed (REF signal)

Mass air flow sensor Amount of intake air EM

Engine coolant temperature sensor Engine coolant temperature

Ignition switch Start signal EVAP canister LC

EVAP canister purge vol-
Throttle position sensor Throttle position purge flow con-
ume control solenoid valve
trol
Throttle position switch Closed throttle position

Density of oxygen in exhaust gas

Heated oxygen sensor 1 (front)
(Mixture ratio feedback signal) FE
Fuel tank temperature sensor Fuel temperature in fuel tank

Vehicle speed sensor Vehicle speed CL

This system controls flow rate of fuel vapor from the EVAP canis-
ter. The opening of the vapor by-pass passage in the EVAP canis- MT
ter purge volume control solenoid valve changes to control the flow
rate. The EVAP canister purge volume control solenoid valve
repeats ON/OFF operation according to the signal sent from the AT
ECM. The opening of the valve varies for optimum engine control.
The optimum value stored in the ECM is determined by consider-
ing various engine conditions. When the engine is operating, the AX
flow rate of fuel vapor from the EVAP canister is regulated as the
air flow changes.
SU

BR

COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a
NFEC0871S02 ST
ON/OFF duty to control the flow rate of fuel vapor from the EVAP
canister. The EVAP canister purge volume control solenoid valve RS
is moved by ON/OFF pulses from the ECM. The longer the ON
pulse, the greater the amount of fuel vapor that will flow through the
valve. BT

HA
SEF337U

CONSULT-II Reference Value in Data Monitor SC

Mode NFEC0872
Specification data are reference values. EL
MONITOR ITEM CONDITION SPECIFICATION

I Engine: After warming up Idle (Vehicle stopped) 0% IDX

I Air conditioner switch “OFF”
PURG VOL C/V
I Shift lever: “N”
I No-load 2,000 rpm —

EC-299
 DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
(CIRCUIT) WITH EURO-OBD
On Board Diagnosis Logic

On Board Diagnosis Logic NFEC0873

Malfunction is detected when an improper voltage signal is sent to
ECM through the valve.

Possible Cause NFEC0874

I Harness or connectors
(The valve circuit is open or shorted.)
I EVAP canister purge volume control solenoid valve

DTC Confirmation Procedure NFEC0875

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm battery
voltage is more than 11V at idle.
WITH CONSULT-II NFEC0875S01

SEF058Y
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and let it idle for at least 13 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-302.
WITH GST NFEC0875S02
Follow the proocedure “WITH CONSULT-II” above.

EC-300
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
(CIRCUIT) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0876

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

MEC002D RS

BT

HA

SC

EL

IDX

SEF858Y

EC-301
 DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0877

1 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.

SEF266X
3. Turn ignition switch “ON”.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 2 and ground with CONSULT-II or
tester.

SEF333X

OK or NG
OK © GO TO 3.
NG © GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connector M19
I 15A fuse
I Harness for open or short between EVAP canister purge volume control solenoid valve and fuse
© Repair harness or connectors.

EC-302
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
GI
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 1 and EVAP canister purge volume control solenoid valve terminal 1.
Refer to Wiring Diagram.
MA
Continuity should exist.
4. Also check harness for short to ground and short to power.
EM
OK or NG
OK (With CONSULT-II) © GO TO 4.
LC
OK (Without CONSULT- © GO TO 5.
II)
NG © Repair open circuit or short to ground and short to power in harness or connetors.

4 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION FE

With CONSULT-II
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that engine speed varies according CL
to the valve opening.

MT

AT

AX

SU
SEF677Y

OK or NG BR
OK © GO TO 6.
NG © GO TO 5. ST

RS

BT

HA

SC

EL

IDX

EC-303
 DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
(CIRCUIT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-II
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

SEF334X

Without CONSULT-II
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

SEF335X

OK or NG
OK © GO TO 6.
NG © Replace EVAP canister purge volume control solenoid valve.

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-304
DTC P0500 VEHICLE SPEED SENSOR (VSS) WITH EURO-OBD
Component Description

Component Description =NFEC0878

The vehicle speed sensor is installed in the transaxle. It contains a
pulse generator which provides a vehicle speed signal to the GI
speedometer. The speedometer then sends a signal to the ECM.
MA

EM

AEC110 LC
On Board Diagnosis Logic NFEC0879
Malfunction is detected when the almost 0 km/h (0 MPH) signal
from vehicle speed sensor is sent to ECM even when vehicle is
being driven.
FE

CL

MT
Possible Cause NFEC0880
I Harness or connector AT
(The vehicle speed sensor circuit is open or shorted.)
I Vehicle speed sensor
AX

SU

BR

DTC Confirmation Procedure NFEC0881 ST

CAUTION:
Always drive vehicle at a safe speed.
NOTE: RS
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test. BT
TESTING CONDITION:
Steps 1 and 2 may be conducted with the drive wheels lifted
in the shop or by driving the vehicle. If a road test is expected HA
to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II NFEC0881S01
SC
1) Start engine (TCS switch “OFF”).
2) Read “VHCL SPEED SE” in “DATA MONITOR” mode with
CONSULT-II. The vehicle speed on CONSULT-II should EL
exceed 10 km/h (6 MPH) when rotating wheels with suitable
gear position.
If NG, go to “Diagnostic Procedure”, EC-308. IDX
If OK, go to following step.
3) Select “DATA MONITOR” mode with CONSULT-II.
4) Warm engine up to normal operating temperature.
SEF196Y

EC-305
 DTC P0500 VEHICLE SPEED SENSOR (VSS) WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
5) Maintain the following conditions for at least 10 consecutive
seconds.
ENG SPEED 1,400 - 6,000 rpm

COOLAN TEMP/S More than 70°C (158°F)

B/FUEL SCHDL 4 - 8 msec

Selector lever Suitable position

PW/ST SIGNAL OFF

6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,

EC-308.

Overall Function Check NFEC0882

Use this procedure to check the overall function of the vehicle
speed sensor circuit. During this check, a 1st trip DTC might not
be confirmed.
WITH GST NFEC0882S01
1) Lift up drive wheels.
2) Start engine.
3) Read vehicle speed sensor signal in “MODE 1” with GST.
The vehicle speed sensor on GST should be able to exceed
10 km/h (6 MPH) when rotating wheels with suitable gear posi-
tion.
4) If NG, go to “Diagnostic Procedure”, EC-308.

EC-306
DTC P0500 VEHICLE SPEED SENSOR (VSS) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0883

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

MEC450D RS

BT

HA

SC

EL

IDX

SEF859Y

EC-307
 DTC P0500 VEHICLE SPEED SENSOR (VSS) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0884

1 CHECK VEHICLE SPEED SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and combination meter harness connector.
3. Check harness continuity between ECM terminal 86 and combination meter terminal 32.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 3.
NG © GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Harness for open or short between ECM and combination meter
© Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK SPEEDOMETER FUNCTION

Make sure that speedometer functions properly.
OK or NG
OK © GO TO 5.
NG © GO TO 4.

4 CHECK SPEEDOMETER CIRCUIT FOR OPEN AND SHORT

Check the following.
I Harness connectors M15, E81
I Harness for open or short between combination meter and ABS actuator and electric unit
OK or NG
OK © Check combination meter and ABS actuator and electric unitr. Refer to EL or BR section.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-308
DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
Description

Description NFEC0885
SYSTEM DESCRIPTION NFEC0885S01
GI
Sensor Input Signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Engine speed (POS signal) MA

Crankshaft position sensor (REF) Engine speed (REF signal)

Mass air flow sensor Amount of intake air EM

Engine coolant temperature sensor Engine coolant temperature

Ignition switch Start signal LC

Throttle position sensor Throttle position

Park/neutral position (PNP) switch Park/neutral position

Idle air control IACV-AAC valve
Air conditioner switch Air conditioner operation

Power steering oil pressure switch Power steering load signal FE

Battery Battery voltage

Vehicle speed sensor Vehicle speed

CL
Ambient air temperature switch Ambient air temperature
MT
Intake air temperature sensor Intake air temperature

Absolute pressure sensor Ambient barometic pressure

AT
This system automatically controls engine idle speed to a specified
level. Idle speed is controlled through fine adjustment of the
amount of air which by-passes the throttle valve via IACV-AAC AX
valve. The IACV-AAC valve changes the opening of the air by-pass
passage to control the amount of auxiliary air. This valve is actu-
ated by a step motor built into the valve, which moves the valve in SU
the axial direction in steps corresponding to the ECM output sig-
nals. One step of IACV-AAC valve movement causes the respec-
tive opening of the air by-pass passage. (i.e. when the step BR
advances, the opening is enlarged.) The opening of the valve is
varied to allow for optimum control of the engine idling speed. The
crankshaft position sensor (POS) detects the actual engine speed ST
and sends a signal to the ECM. The ECM then controls the step
position of the IACV-AAC valve so that engine speed coincides with
the target value memorized in ECM. The target engine speed is the
RS
lowest speed at which the engine can operate steadily. The opti-
mum value stored in the ECM is determined by takig into consid- BT
eration various engine conditions, such as during warm up,
deceleration, and engine load (air conditioner, power steering and
cooling fan operation). HA

COMPONENT DESCRIPTION NFEC0885S02

SC
IACV-AAC Valve NFEC0885S0201
The IACV-AAC valve is operated by a step motor for centralized
control of auxiliary air supply. This motor has four winding phases EL
and is actuated by the output signals of ECM which turns ON and
OFF two windings each in seqeunce. Each time the IACV-AAC
valve opens or closes to change tha auxiliary air quantity, the ECM IDX
sends a pulse signal to the step motor. When no change in the
auxiliary air quantity is needed, the ECM does not issue the pulse
signal. A certain voltage signal is issued so that the valve remains
SEF765P
at that particular opening.

EC-309
 DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
CONSULT-II Reference Value in Data Monitor Mode

CONSULT-II Reference Value in Data Monitor

Mode NFEC0886
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Engine: After warming up Idle 2 - 10 step

I Air conditioner switch: “OFF”
IACV-AAC/V
I Shift lever: “N”
I No-load 2,000 rpm —

On Board Diagnosis Logic NFEC0887

Malfunction is detected when
(Malfunction A) the IACV-AAC valve does not operate properly,
(Malfunction B) the IACV-AAC valve does not operate properly.

Possible Cause NFEC0888

MALFUNCTION A NFEC0888S01
I Harness or connectors
(The IACV-AAC valve circuit is open.)
I IACV-AAC valve
MALFUNCTION B NFEC0888S02
I Harness or connectors
(The IACV-AAC valve circuit is shorted.)
I Air control valve (Power steering)
I IACV-AAC valve
DTC Confirmation Procedure NFEC0889
NOTE:
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.
I If the engine idle speed is out of the specified value, per-
form “Idle air Volume Learning”, EC-41, before conducting
“DTC Confirmation Procedure”. For the target idle speed,
refer to the “Service Data and Specifications (SDS)”,
EC-452.
I Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st
trip DTC cannot be confirmed, perform “PROCEDURE
FOR MALFUNCTION B”.

EC-310
DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
PROCEDURE FOR MALFUNCTION A NFEC0889S01
TESTING CONDITION:
Before performing the following procedure, confirm that bat- GI
tery voltage is more than 10.5V with ignition switch “ON”.
With CONSULT-II NFEC0889S0101 MA
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and let it idle. EM
4) Keep engine speed at 2,500 rpm for three seconds, then let it
idle for three seconds.
SEF058Y
Do not rev engine to more than 3,000 rpm.
LC
5) Perform step 4 once more.
6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-313.
With GST NFEC0889S0102 FE
Follow the procedure “With CONSULT-II” above.

CL

MT
PROCEDURE FOR MALFUNCTION B NFEC0889S02
TESTING CONDITION: AT
I Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.
I Always perform the test at a temperature above −10°C
AX
(14°F).
With CONSULT-II NFEC0889S0201
SU
1) Open engine hood.
2) Start engine and warm it up to normal operating temperature.
BR
SEF174Y 3) Turn ignition switch “OFF” and wait at least 10 seconds.
4) Turn ignition switch “ON” again and select “DATA MONITOR”
mode with CONSULT-II ST
5) Start engine and run it for at least 1 minute at idle speed.
6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-313. RS
With GST NFEC0889S0202
Follow the procedure “With CONSULT-II” above. BT

HA

SC

EL

IDX

EC-311
 DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0890

MEC451D

SEF625XB

EC-312
DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0891

1 CHECK IACV-AAC VALVE POWER SUPPLY CIRCUIT GI

1. Stop engine.
2. Disconnect IACV-AAC valve harness connector.
MA

EM

LC

SEC008C
3. Turn ignition switch “ON”. FE
4. Check voltage between IACV-AAC valve terminals 2, 5 and ground with CONSULT-II or tester.

CL

MT

AT

AX
SEF343X

OK or NG
SU
OK © GO TO 3.
NG © GO TO 2.
BR
2 DETECT MALFUNCTIONING PART
Check the following.
ST
I Harness connectors E15, F18
I Harness for open or short between IACV-AAC valve and ECM relay
RS
© Repair harness or connectors.

BT

HA

SC

EL

IDX

EC-313
 DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK IACV-AAC VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals and IACV-AAC valve terminals as follows.
Refer to Wiring Diagram.

MTBL0354
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK AIR CONTROL VALVE (POWER STEERING) OPERATION-I

1. Reconnect ECM harness connector and IACV-AAC valve harness connector.
2. Disconnect vacuum hose connected to air control valve (Power steering) at intake air duct.
3. Start engine and let it idle.
4. Check vacuum hose for vacuum existence.

SEF971X
Vacuum slightly exists or does not exist.
OK or NG
OK © GO TO 5.
NG © Replace air control valve (Power steering).

EC-314
DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK AIR CONTROL VALVE (POWER STEERING) OPERATION-II

Check vacuum hose for vacuum existence when steering wheel is turned. GI

MA

EM

LC

SEF971X
Vacuum should exist.
OK or NG
FE
OK © GO TO 8.
NG © GO TO 6.
CL
6 CHECK VACUUM PORT
1. Stop engine. MT
2. Disconnect vacuum hose connected to air control valve (Power steering) at vacuum port.
3. Blow air into vacuum port.
4. Check that air flows freely. AT

AX

SU

BR

SEF972X ST
OK or NG
OK © GO TO 7. RS
NG © Repair or clean vacuum port.
BT

HA

SC

EL

IDX

EC-315
 DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK VACUUM HOSES AND TUBES

1. Disconnect vacuum hoses between air control valve (Power steering) and vacuum port, air control valve (Power steer-
ing) and intake air duct.
2. Check the hoses and tubes for crack, clogging, improper connection or disconnection.

SEF109L

OK or NG
OK © GO TO 8.
NG © Repair hoses or tubes.

8 CHECK IACV-AAC VALVE-I

1. Disconnect IACV-AAC valve harness connector.
2. Check resistance between IACV-AAC valve terminal 2 and terminals 1, 3, terminal 5 and terminals 4, 6.

SEF344X

OK or NG
OK © GO TO 9.
NG © Replace IACV-AAC valve assembly.

EC-316
DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK IACV-AAC VALVE-II

1. Reconnect IACV-AAC valve harness connector and ECM harness connector. GI
2. Turn ignition switch “ON” and “OFF”, and ensure the IACV-AAC valve makes operating sound according to the ignition
switch position.
MA

EM

LC

SEC009C

OK or NG FE
OK © GO TO 11.
NG © GO TO 10. CL

10 REPLACE IACV-AAC VALVE MT

1. Replace IACV-AAC valve assembly.
2. Perform “Idle Air Volume Learning”, EC-41.
Is the result CMPLT or INCMP? AT
CMPLT or INCMP
CMPLT © INSPECTION END AX
INCMP © Follow the construction of “Idle Air Volume Learning”.
SU
11 CHECK TARGET IDLE SPEED
1. Turn ignition switch “OFF”. BR
2. Reconnect all harness connectors and vacuum hoses.
3. Start engine and warm it up to normal operating temperature.
4. Also warm up transmission to normal operating temperature.
I For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “A/T” system indicates
ST
less than 0.9V.
I For models without CONSULT-II, drive vehicle for 10 minutes.
5. Stop vehicle with engine running.
RS
6. Check target idle speed.
700±50 rpm (in “P” or “N” position)
BT
OK or NG
OK © GO TO 12.
HA
NG © Perform “Idle Air Volume Learning”, EC-41.

12 CHECK INTERMITTENT INCIDENT

SC
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END EL

IDX

EC-317
 DTC P0510 CLOSED THROTTLE POSITION
SWITCH WITH EURO-OBD
Component Description

Component Description NFEC0892

A closed throttle position switch and wide open throttle position
switch are built into the throttle position sensor unit. The wide open
throttle position switch is used only for A/T control.
When the throttle valve is in the closed position, the closed throttle
position switch sends a voltage signal to the ECM. The ECM only
uses this signal to open or close the EVAP canister purge volume
control solenoid valve when the throttle position sensor is malfunc-
tioning.

SEF505V

CONSULT-II Reference Value in Data Monitor

Mode NFEC0893
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Engine: After warming up, idle Throttle valve: Idle position ON

CLSD THL/P SW
the engine Throttle valve: Slightly open OFF

On Board Diagnosis Logic NFEC0894

Malfunction is detected when battery voltage from the closed
throttle position switch is sent to ECM with the throttle valve
opened.

Possible Cause NFEC0895

I Harness or connectors
(The closed throttle position switch circuit is shorted.)
I Closed throttle position switch
I Throttle position sensor

EC-318
DTC P0510 CLOSED THROTTLE POSITION
SWITCH WITH EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0896

CAUTION:
Always drive vehicle at a safe speed. GI
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, MA
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
WITH CONSULT-II EM
NFEC0896S01
1) Start engine and warm it up to normal operating temperature.
SEF197Y 2) Turn ignition switch “OFF”, wait at least 10 seconds and then LC
start engine.
3) Select “CLSD THL/P SW” in “DATA MONITOR” mode.
If “CLSD THL/P SW” is not available, go to step 5.
4) Check the signal under the following conditions.
Condition Signal indication FE
Throttle valve: Idle position ON

Throttle valve: Slightly open OFF CL

If the result is NG, go to “Diagnostic Procedure”, EC-322.
SEF198Y
If OK, go to following step. MT
5) Select “DATA MONITOR” mode with CONSULT-II.
6) Drive the vehicle for at least 5 consecutive seconds under the
following condition. AT
THRTL POS SEN More than 2.5V

VHCL SPEED SE More than 5 km/h (3 MPH)

AX
Selector lever Suitable position
SU
Driving vehicle uphill (Increased engine load)
Driving location will help maintain the driving conditions
required for this test.
BR
7) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-322. ST

RS

BT

HA

Overall Function Check NFEC0897

SC
Use this procedure to check the overall function of the closed
throttle position switch circuit. During this check, a 1st trip DTC
might not be confirmed. EL
WITH GST NFEC0897S01
1) Start engine and warm it up to normal operating temperature. IDX
2) Check the voltage between ECM terminal 56 (Closed throttle
position switch signal) and ground under the following condi-
tions.
SEF345X At idle: Battery voltage

EC-319
 DTC P0510 CLOSED THROTTLE POSITION
SWITCH WITH EURO-OBD
Overall Function Check (Cont’d)
At 2,000 rpm: Approximately 0V
3) If NG, go to “Diagnostic Procedure”, EC-322.

EC-320
DTC P0510 CLOSED THROTTLE POSITION
SWITCH WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0898

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC452D
HA

SC

EL

IDX

SEF626XC

EC-321
 DTC P0510 CLOSED THROTTLE POSITION
SWITCH WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0899

1 CHECK CLOSED THROTTLE POSITION SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect throttle position switch harness connector.

SEC001C
3. Turn ignition switch “ON”.
4. Check voltage between throttle position switch terminal 5 and engine ground with CONSULT-II or tester.

SEF346X

OK or NG
OK © GO TO 3.
NG © GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E15, F18
I Harness for open or short between throttle position switch and ECM relay
I Harness for open or short between throttle position switch and ECM
© Repair harness or connectors.

3 CHECK CLOSED THROTTLE POSITION SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 56 and throttle position switch terminal 4.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-322
 DTC P0510 CLOSED THROTTLE POSITION
SWITCH WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK IGNITION TIMING AND ENGINE IDLE SPEED

Check the following items. Refer to “Basic Inspection”, EC-81. GI

MA

MTBL0663 EM

Models with CONSULT-II © GO TO 6.

LC
Models without CON- © GO TO 6.
SULT-II

5 CHECK THROTTLE POSITION SWITCH

With CONSULT-II FE
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”.
3. Turn ignition switch “ON”. CL
4. Select “DATA MONITOR” mode with CONSULT-II.
5. Check indication of “CLSD THL/P SW” under the following conditions.
Measurement must be made with throttle position switch installed in vehicle. MT

AT

MTBL0355
AX
OK or NG
OK (With CONSULT-II) © GO TO 8.
SU
OK (Without CONSULT- © GO TO 9.
II)
NG © GO TO 7. BR

ST

RS

BT

HA

SC

EL

IDX

EC-323
 DTC P0510 CLOSED THROTTLE POSITION
SWITCH WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK THROTTLE POSITION SWITCH

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”.
3. Disconnect closed throttle position switch harness connector.
4. Check continuity between closed throttle position switch terminals 4 and 5 under the following conditions.
Resistance measurement must be made with throttle position switch installed in vehicle.

SEC010C

OK or NG
OK (With CONSULT-II) © GO TO 8.
OK (Without CONSULT- © GO TO 9.
II)
NG © GO TO 7.

7 ADJUST THROTTLE POSITION SWITCH

Check the following items. Refer to “Basic Inspection”, EC-81.

MTBL0662
Is it possible to adjust closed throttle position switch?
Yes or No
Yes (With CONSULT-II) © GO TO 9.
Yes (Without CONSULT- © GO TO 9.
II)
No © Replace throttle position switch.

EC-324
 DTC P0510 CLOSED THROTTLE POSITION
SWITCH WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK THROTTLE POSITION SENSOR

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Stop engine (ignition switch OFF).
3. Turn ignition switch ON. MA
4. Select “DATA MONITOR” mode with CONSULT-II.
5. Check voltage of “THRTL POS SEN” under the following conditins.
Voltage measurement must be made with throttle position sensor installed in vehicle.
EM

LC

MTBL0230

OK or NG
OK © GO TO 10. FE
NG © Replace throttle position sensor.
CL
9 CHECK THROTTLE POSITION SENSOR
1. Start engine and warm it up to normal operating temperature. MT
2. Stop engine (ignition switch OFF).
3. Turn ignition switch ON.
4. Check voltage between ECM terminal 91 (Throttle position sensor signal) and ground. AT
Voltage measurement must be made with throttle position sensor installed in vehicle.

AX

SU

BR

SEF348X
ST
OK or NG
OK © GO TO 10. RS
NG © Replace throttle position sensor.
BT
10 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. HA
© INSPECTION END

SC

EL

IDX

EC-325
 DTC P0605 ECM WITH EURO-OBD
Component Description

Component Description NFEC0900

The ECM consists of a microcomputer and connector for signal
input and output and for power supply. The unit controls the engine.

SEC220B

On Board Diagnosis Logic NFEC0901

Malfunction is detected when ECM calculation function is
malfunctioning.

Possible Cause NFEC0902

I ECM

DTC Confirmation Procedure NFEC0903

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.

WITH CONSULT-II NFEC0903S01

1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine.
4) Run engine for at least 30 seconds at idle speed.
5) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-327.
WITH GST NFEC0903S02
Follow the procedure “WITH CONSULT-II” above.
SEF058Y

EC-326
 DTC P0605 ECM WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0904

1 INSPECTION START GI
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SELF DIAG RESULTS” mode with CONSULT-II. MA
3. Touch “ERASE”.
4. Perform “DTC Confirmation Procedure”.
See EC-326. EM
5. Is the 1st trip DTC P0605 displayed again?
With GST
1. Turn ignition switch “ON”.
LC
2. Select MODE 4 with GST.
3. Touch “ERASE”.
4. Perform “DTC Confirmation Procedure”.
See EC-326.
5. Is the 1st trip DTC P0605 displayed again?
FE
Yes or No
Yes [With NVIS (NATS) © GO TO 2.
system] CL
Yes [Without NVIS © GO TO 3.
(NATS) system]
MT
No © INSPECTION END

AT
2 REPLACE ECM
1. Turn ignition switch “OFF”.
2. Replace ECM. AX
3. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to “NVIS
(Nissan Vehicle Immobilizer System — NATS)”, EC-56.
4. Perform “Idle Air Volume Learning”, EC-41. SU
Which is the result CMPLT or INCMP?
CMPLT or INCMP
BR
CMPLT © INSPECTION END
INCMP © Follow the construction of “Idle Air Volume Learning”.
ST
3 REPLACE ECM
1. Turn ignition switch “OFF”.
RS
2. Replace ECM.
3. Perform “Idle Air Volume Learning”, EC-41.
Which is the result CMPLT or INCMP?
BT
CMPLT or INCMP
CMPLT © INSPECTION END HA
INCMP © Follow the construction of “Idle Air Volume Learning”.
SC

EL

IDX

EC-327
 DTC P1131 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Description

Description NFEC0905
SYSTEM DESCRIPTION NFEC0905S01

Sensor Input Signal to ECM ECM function Actuator

Throttle position sensor Throttle position

Ignition switch Start signal Swirl control valve control

solenoid valve
Crankshaft position sensor (POS) Engine speed (POS signal) Swirl control " Vacuum signal
Crankshaft position sensor (REF) Engine speed (REF signal) valve control Swirl control valve actuator
"
Mass air flow sensor Amount of intake air Swirl control valve

Engine coolant temperature sensor Engine coolant temperature

This system has a swirl control valve in the intake passage of each
cylinder.
While idling and during low engine speed operation, the swirl con-
trol valve closes. Thus the velocity of the air in the intake passage
increases, promoting the vaporization of the fuel and producing a
swirl in the combustion chamber.
Because of this operation, this system tends to increase the burn-
ing speed of the gas mixture, improve fuel consumption, and
increase the stability in running conditions.
Also, except when idling and during low engine speed operation,
this system opens the swirl control valve. In this condition, this
system tends to increase power by improving intake efficiency via
reduction of intake flow resistance, intake flow.
The solenoid valve controls swirl control valve’s shut/open condi-
tion. This solenoid valve is operated by the ECM.
Throttle position Swirl control valve
sensor (Idle posi- Engine speed control solenoid Swirl control valve
tion) valve

ON Below 3,200 rpm ON Closed

Less than 3,200

ON Closed
rpm
OFF
More than 3,600
OFF Open
rpm

When engine coolant temperature is below 10°C (50°F) and above 55°C (131°F),
swirl control valve is kept open regardless of above condition.

SEF045Y

EC-328
 DTC P1131 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Description (Cont’d)
COMPONENT DESCRIPTION NFEC0905S02
Swirl Control Valve Control Solenoid Valve NFEC0905S0201
The swirl control valve control solenoid valve responds to signals GI
from the ECM. When the ECM sends an ON (ground) signal, the
solenoid valve is bypassed to apply intake manifold vacuum to the
swirl control valve actuator. This operation closes the swirl control MA
valve. When the ECM sends an OFF signal, the vacuum signal is
cut and the swirl control valve opens.
EM

SEF272X LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC0906
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
Engine coolant temperature is
between 15°C (59°F) to 50°C ON
SWRL CONT S/V I Engine speed: Idle (122°F). CL
Engine coolant temperature is
OFF
above 55°C (131°F).
MT
On Board Diagnosis Logic NFEC0907
Malfunction is detected when an improper voltage signal is sent to AT
ECM through swirl control valve control solenoid valve.
AX

SU

BR

Possible Cause NFEC0908 ST

I Harness or connectors
(The swirl control valve control solenoid valve circuit is open or
shorted.) RS
I Swirl control valve control solenoid valve

BT

HA

DTC Confirmation Procedure NFEC0909

SC
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds EL
before conducting the next test.
IDX

EC-329
 DTC P1131 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
WITH CONSULT-II NFEC0909S01
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 5 seconds.
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-332.
WITH GST NFEC0909S02
Follow the procedure “With CONSULT-II” above.

SEF058Y

EC-330
DTC P1131 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0910

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC007D
HA

SC

EL

IDX

SEF627XB

EC-331
 DTC P1131 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0911

1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes © GO TO 2.
No © GO TO 3.

2 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE CIRCUIT

With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON” and “OFF” on CONSULT-II screen.

SEF069Y
4. Make sure that clicking sound is heard from the swirl control valve control solenoid valve.
OK or NG
OK © GO TO 6.
NG © GO TO 3.

EC-332
 DTC P1131 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. GI
2. Disconnect swirl control valve control solenoid valve harness connector.

MA

EM

LC

SEF272X
3. Turn ignition switch “ON”.
4. Check voltage between swirl control valve control solenoid valve terminal 1 and ground with CONSULT-II or tester. FE

CL

MT

AT

SEF619X
AX
OK or NG
OK © GO TO 5.
SU
NG © GO TO 4.

4 DETECT MALFUNCTIONING PART

BR
Check the following.
I Harness connectors M46, F44 ST
I 15A fuse
I Harness for open or short between swirl control valve control solenoid valve and fuse
© Repair harness or connectors. RS

5 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN BT
AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector. HA
3. Check harness continuity between ECM terminal 29 and swirl control valve control solenoid valve terminal 2. Refer to
Wiring Diagram.
Continuity should exist. SC
4. Also check harness for short to ground and short to power.
OK or NG EL
OK © GO TO 6.
NG © Repair open circuit, short to ground or short to power in harness connectors.
IDX

EC-333
 DTC P1131 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE

With CONSULT-II
1. Reconnect the disconnected harness connectors.
2. Start engine and let it idle.
3. Remove vacuum hose connected to swirl control valve actuator.
4. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
5. Touch “ON” and “OFF” on CONSULT-II screen.
6. Check vacuum existence and operation delay time under the following conditions.

SEF046Y

Without CONSULT-II
1. Reconnect ECM harness connector.
2. Remove vacuum hose connected to swirl control valve actuator.
3. Start engine and let it idle.
4. Apply 12V of direct current between swirl control valve control solenoid valve terminals 1 and 2.
5. Check vacuum existence and operation delay time under the following conditions.

SEF047Y

OK or NG
OK © GO TO 7.
NG © Replace intake manifold collector assembly.

7 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-334
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
System Description

System Description NFEC0912

COOLING FAN CONTROL NFEC0912S01
GI
Sensor Input Signal to ECM ECM function Actuator

Vehicle speed sensor Vehicle speed MA

Engine coolant temperature sensor Engine coolant temperature
Cooling fan Cooling fan
Air conditioner switch Air conditioner “ON” signal
control relay(s) EM
Ignition switch Start signal

Refrigerant pressure sensor Refrigerant pressure LC

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refriger-
ant pressure and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].
OPERATION NFEC0912S02
VQ20DE Engine Models NFEC0912S0201
FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

SEF001Y
HA

SC

EL

IDX

EC-335
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
System Description (Cont’d)
VQ30DE Engine Models NFEC0912S0202

SEF578XB

CONSULT-II Reference Value in Data Monitor

Mode NFEC0913
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

Air conditioner switch: OFF OFF

I Engine: After warming up, idle
AIR COND SIG Air conditioner switch: ON
the engine ON
(Compressor operates)

Engine coolant temperature is

OFF
94°C (201°F) or less

I After warming up engine, idle Engine coolant temperature is

COOLING FAN the engine. between 95°C (203°F) and 104°C LOW
I Air conditioner switch: OFF (219°F)

Engine coolant temperature is

HIGH
105°C (221°F) or more

On Board Diagnosis Logic NFEC0914

If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
Malfunction is detected when cooling fan does not operate properly (Overheat), cooling fan system does not
operate properly (Overheat) and engine coolant was not added to the system using the proper filling method.
Possible Cause NFEC0915
I Harness or connectors
(The cooling fan circuit is open or shorted.)
I Cooling fan
I Radiator hose
I Radiator
I Radiator cap
I Water pump
I Thermostat

EC-336
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Possible Cause (Cont’d)
For more information, refer to “MAIN 12 CAUSES OF
OVERHEATING”, EC-352.
CAUTION: GI
When a malfunction is indicated, be sure to replace the cool-
ant following the procedure in the MA-14, “Changing Engine
Coolant”. Also, replace the engine oil. MA
1) Fill radiator with coolant up to specified level with a fill-
ing speed of 2 liters per minute. Be sure to use coolant
with the proper mixture ratio. Refer to MA-12, “Engine EM
Coolant Mixture Ratio”.
2) After refilling coolant, run engine to ensure that no LC
water-flow noise is emitted.

FE

CL

MT
Overall Function Check NFEC0916
Use this procedure to check the overall function of the cooling fan. AT
During this check, a DTC might not be confirmed.
WARNING: AX
Never remove the radiator cap when the engine is hot. Serious
burns could be caused by high pressure fluid escaping from
the radiator. SU
Wrap a thick cloth around cap. Carefully remove the cap by
turning it a quarter turn to allow built-up pressure to escape.
Then turn the cap all the way off. BR
SEF621W
WITH CONSULT-II NFEC0916S01
1) Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
ST
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to “Diagnos- RS
tic Procedure”, EC-341.
2) Confirm whether the customer filled the coolant or not. If the
customer filled the coolant, skip the following steps and go to BT
“Diagnostic Procedure”, EC-341.
3) Turn ignition switch “ON”.
4) Perform “COOLING FAN” in “ACTIVE TEST” mode with CON- HA
SEF111X SULT-II.
5) If the results are NG, go to “Diagnostic Procedure”, EC-341.
SC

EL

IDX

EC-337
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Overall Function Check (Cont’d)
WITHOUT CONSULT-II NFEC0916S02
1) Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to “Diagnos-
tic Procedure”, EC-341.
2) Confirm whether the customer filled the coolant or not. If the
customer filled the coolant, skip the following steps and go to
“Diagnostic Procedure”, EC-341.
3) Start engine.
AEC640 Be careful not to overheat engine.
4) Set temperature control lever to full cold position.
5) Turn air conditioner switch “ON”.
6) Turn blower fan switch “ON”.
7) Run engine at idle for a few minutes with the air conditioner
operating.
Be careful not to overheat engine.
8) Make sure the cooling fans are operating at low speeds.
9) Turn ignition switch “OFF”.
10) Turn air conditioner switch and blower fan switch “OFF”.
11) Disconnect engine coolant temperature sensor harness con-
SEC163BA nector.
12) Connect 150Ω resistor to engine coolant temperature sensor
harness connector.
13) Restart engine and make sure the cooling fans are operating
at high speed.
Be careful not to overheat engine.
14) If NG, go to “Diagnostic Procedure”, EC-341.

MEC475B

EC-338
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0917

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC463D

EC-339
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Wiring Diagram (Cont’d)

MEC849C

SEF630XB

EC-340
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0918

1 INSPECTION START GI
Do you have CONSULT-II?
Yes or No MA
Yes © GO TO 2.
No © GO TO 4.
EM
2 CHECK COOLING FAN LOW SPEED OPERATION
LC
With CONSULT-II
1. Disconnect cooling fan relays-2 and -3.

FE

CL

MT
SEC006C
2. Turn ignition switch “ON”. AT
3. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-II.

AX

SU

BR

ST
SEF646X
4. Make sure that cooling fans-1 and -2 operate at low speed.
OK or NG RS
OK © GO TO 3.
NG © Check cooling fan low speed control circuit. (Go to PROCEDURE A, EC-347.) BT

HA

SC

EL

IDX

EC-341
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK COOLING FAN HIGH SPEED OPERATION

With CONSULT-II
1. Turn ignition switch “OFF”.
2. Reconnect cooling fan relays-2 and -3.
3. Turn ignition switch “ON”.
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-II.

SEF111X
5. Make sure that cooling fans-1 and -2 operate at high speed.
OK or NG
OK © GO TO 6.
NG © Check cooling fan high speed control circuit. (Go to PROCEDURE B, EC-350.)

EC-342
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK COOLING FAN LOW SPEED OPERATION

Without CONSULT-II GI
1. Disconnect cooling fan relays-2 and -3.

MA

EM

LC

SEC006C
2. Start engine and let it idle.
3. Set temperature lever at full cold position. FE
4. Turn air conditioner switch “ON”.
5. Turn blower fan switch “ON”.
6. Make sure that cooling fans-1 and -2 operate at low speed.
CL

MT

AT

AX

SEC163BA SU
OK or NG
OK © GO TO 5. BR
NG © Check cooling fan low speed control circuit. (Go to PROCEDURE A, EC-347.)

ST

RS

BT

HA

SC

EL

IDX

EC-343
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK COOLING FAN HIGH SPEED OPERATION

Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Reconnect cooling fan relays-2 and -3.
3. Turn air conditioner switch and blower fan switch “OFF”.
4. Disconnect engine coolant temperature sensor harness connector.
5. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
6. Restart engine and make sure that cooling fans-1 and -2 operate at high speed.

MEC475B

OK or NG
OK © GO TO 6.
NG © Check cooling fan high speed control circuit. (Go to PROCEDURE B, EC-350.)

6 CHECK COOLING SYSTEM FOR LEAK

Apply pressure to the cooling system with a tester, and check if the pressure drops.
Testing pressure: 157 kPa (1.57 bar, 1.6 kg/cm2, 23 psi)
CAUTION:
Higher than the specified pressure may cause radiator damage.

SLC754A
Pressure should not drop.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following for leak.
I Hose
I Radiator
I Water pump (Refer to LC-12, “Water Pump”.)
© Repair or replace.

EC-344
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK RADIATOR CAP

Apply pressure to cap with a tester and check radiator cap relief pressure. GI

MA

EM

LC

SLC755A
Radiator cap relief pressure:
59 - 98 kPa (0.59 - 0.98 bar, 0.6 - 1.0 kg/cm2, 9 - 14 psi)
OK or NG FE
OK © GO TO 9.
NG © Replace radiator cap. CL

9 CHECK THERMOSTAT MT
1. Remove thermostat.
2. Check valve seating condition at normal room temperatures.
It should seat tightly. AT
3. Check valve opening temperature and valve lift.

AX

SU

BR

ST
SLC343
Valve opening temperature:
82°C (180°F) [standard]
RS
Valve lift:
More than 8.6 mm/95°C (0.339 in/203°F)
4. Check if valve is closed at 5°C (9°F) below valve opening temperature. For details, refer to LC-16, “Thermostat”.
BT
OK or NG
OK © GO TO 10. HA
NG © Replace thermostat.
SC

EL

IDX

EC-345
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

10 CHECK ENGINE COOLANT TEMPERATURE SENSOR

1. Remove engine coolant temperature sensor.
2. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.

SEF304X

OK or NG
OK © GO TO 11.
NG © Replace engine coolant temperature sensor.

11 CHECK MAIN 12 CAUSES

If the cause cannot be isolated, go to “MAIN 12 CAUSES OF OVERHEATING”, EC-352.
© INSPECTION END

EC-346
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)
PROCEDURE A =NFEC0918S01

1 CHECK COOLING FAN POWER SUPPLY CIRCUIT GI

1. Turn ignition switch “OFF”.
2. Disconnect cooling fan relay-1.
3. Turn ignition switch “ON”. MA
4. Check voltage between cooling fan relay-1 terminals 1, 3, 6 and ground with CONSULT-II or tester.

EM

LC

FE
SEF590X

OK or NG
CL
OK © GO TO 3.
NG © GO TO 2.
MT
2 DETECT MALFUNCTIONING PART
Check the following. AT
I 15A fuse
I 40A fusible links
I Harness for open or short between cooling fan relay-1 and fuse AX
I Harness for open or short between cooling fan relay-1 and battery
© Repair open circuit or short to ground or short to power in harness or connectors.
SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-347
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector.

SEC007C
3. Check harness continuity between cooling fan relay-1 terminal 5 and cooling fan motor-1 terminal 2, cooling fan
motor-1 terminal 3 and body ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between cooling fan relay-1 terminal 7 and cooling fan motor-2 terminal 2, cooling fan
motor-2 terminal 3 and body ground. Refer to Wiring Diagram.
Continuity should exist.
6. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 35 and cooling fan relay-1 terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E8, F17
I Harness for open or short between cooling fan relay-1 and ECM
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-348
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK COOLING FAN RELAY-1

Check continuity between cooling fan relay-1 terminals 3 and 5, 6 and 7 under the following conditions. GI

MA

EM

LC

SEF591X

OK or NG
OK © GO TO 7.
FE
NG © Replace cooling fan relay.

7 CHECK COOLING FAN MOTORS-1 AND -2

CL
Supply battery voltage between the following terminals and check operation.
MT

AT

AX

SU
SEF592X

OK or NG BR
OK © GO TO 8.
NG © Replace cooling fan motors. ST

8 CHECK INTERMITTENT INCIDENT RS

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END BT

HA

SC

EL

IDX

EC-349
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)
PROCEDURE B NFEC0918S02

1 CHECK COOLING FAN POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect cooling fan relays-2 and -3.
3. Turn ignition switch “ON”.
4. Check voltage between cooling fan relays-2 and -3 terminals 1, 3 and ground with CONSULT-II or tester.

SEF593X

OK or NG
OK © GO TO 3.
NG © GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
I Harness for open or short between cooling fan relays-2 and -3 and fuse
I Harness for open or short between cooling fan relays-2 and -3 and fusible link
© Repair harness or connectors.

3 CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector.
3. Check harness continuity between cooling fan relay-2 terminal 5 and cooling fan motor-1 terminal 1, cooling fan relay-2
terminal 7 and cooling fan motor-1 terminal 4, cooling fan relay-2 terminal 6 and body ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between cooling fan relay-3 terminal 5 and cooling fan motor-2 terminal 1, cooling fan relay-3
terminal 7 and cooling fan motor-2 terminal 4, cooling fan relay-3 terminal 6 and body ground. Refer to Wiring Diagram.
Continuity should exist.
6. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 34 and cooling fan relay-2 terminal 2, cooling fan relay-3 terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

EC-350
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness connectors E8, E17
I Harness for open or short between cooling fan relays-2 and -3 and ECM
© Repair open circuit or short to ground or short to power in harness or connectors. MA

6 CHECK COOLING FAN RELAYS-2 AND -3 EM

Check continuity between cooling fan relay-2, -3 terminals 3 and 5, 6 and 7 under the following conditions.

LC

FE

CL
SEF591X

OK or NG
MT
OK © GO TO 7.
NG © Replace cooling fan relays.
AT
7 CHECK COOLING FAN MOTORS
Supply battery voltage between the following terminals and check operation.
AX

SU

BR

ST

SEF592X
RS
OK or NG
OK © GO TO 8. BT
NG © Replace cooling fan motors.
HA
8 CHECK INTERMITTENT INCIDENT
1. Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. SC
© INSPECTION END

EL

IDX

EC-351
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITH EURO-OBD
Main 12 Causes of Overheating

Main 12 Causes of Overheating NFEC0919

Engine Step Inspection item Equipment Standard Reference page

OFF 1 I Blocked radiator I Visual No blocking —

I Blocked condenser
I Blocked radiator grille
I Blocked bumper

2 I Coolant mixture I Coolant tester 50 - 50% coolant mixture See MA-11, “RECOM-
MENDED FLUIDS AND
LUBRICANTS”.

3 I Coolant level I Visual Coolant up to MAX level See MA-14, “Changing

in reservoir tank and Engine Coolant”.
radiator filler neck

4 I Radiator cap I Pressure tester 59 - 98 kPa See LC-11, “System

(0.59 - 1.0 bar, 0.6 - 1.0 Check”.
kg/cm2, 9 - 14 psi) (Limit)

ON*2 5 I Coolant leaks I Visual No leaks See LC-11, “System

Check”.

ON*2 6 I Thermostat I Touch the upper and Both hoses should be See LC-16, “Thermostat”
lower radiator hoses hot and LC-18, “Radiator”.

ON*1 7 I Cooling fan I CONSULT-II Operating See trouble diagnosis for

DTC P1217 (EC-335).

OFF 8 I Combustion gas leak I Color checker chemi- Negative —

cal tester 4 Gas ana-
lyzer

ON*3 9 I Coolant temperature I Visual Gauge less than 3/4 —

gauge when driving

I Coolant overflow to I Visual No overflow during driv- See MA-14, “Changing

reservoir tank ing and idling Engine Coolant”.

OFF*4 10 I Coolant return from I Visual Should be initial level in See MA-13, “ENGINE
reservoir tank to radia- reservoir tank MAINTENANCE”.
tor

OFF 11 I Cylinder head I Straight gauge feeler 0.1 mm (0.004 in) Maxi- See EM-42, “Inspection”.
gauge mum distortion (warping)

12 I Cylinder block and pis- I Visual No scuffing on cylinder See EM-62, “Inspection”.
tons walls or piston

*1: Turn the ignition switch ON.

*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to LC-23, “OVERHEATING CAUSE ANALYSIS”.

EC-352
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Component Description

Component Description NFEC0920

IGNITION COIL & POWER TRANSISTOR NFEC0920S01
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
GI
on and off the ignition coil primary circuit. This on-off operation induces the proper high voltage in the coil
secondary circuit. MA

EM

LC

SEF274XA
FE

CL

MT
On Board Diagnosis Logic NFEC0921
Malfunction is detected when the ignition signal in the primary cir- AT
cuit is not sent to ECM during engine cranking or running.
AX

SU

BR

Possible Cause NFEC0922 ST

I Harness or connectors (The ignition primary circuit is open or
shorted.)
I Power transistor unit built into ignition coil RS
I Condenser
I Crankshaft position sensor (REF)
I Crankshaft position sensor (REF) circuit
BT

HA

DTC Confirmation Procedure NFEC0923

SC
NOTE:
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least EL
10 seconds before conducting the next test.
I If DTC P1320 is displayed with DTC P0335, P0340, P1335
or P1336, perform trouble diagnosis for DTC P0335,
IDX
P0340, P1335 or P1336 first. Refer to EC-280, EC-288,
EC-364 or EC-370.

SEF058Y

EC-353
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
WITH CONSULT-II NFEC0923S01
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine. (If engine does not run, turn ignition switch to
“START” for at least 5 seconds.)
4) If DTC is detected, go to “Diagnostic Procedure”, EC-358.
WITH GST NFEC0923S04
Follow the procedure “WITH CONSULT-II” above.

EC-354
DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0924

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC453D

EC-355
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Wiring Diagram (Cont’d)

MEC752C

EC-356
DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Wiring Diagram (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX
MEC753C

EC-357
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Wiring Diagram (Cont’d)

SEF860Y

Diagnostic Procedure NFEC0925

1 CHECK ENGINE START

Turn ignition switch “OFF”, and restart engine.
Is engine running?
Yes or No
Yes (With CONSULT-II) © GO TO 2.
Yes (Without CONSULT- © GO TO 12.
II)
No © GO TO 3.

2 SEARCH FOR MALFUNCTIONING CIRCUIT

With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
2. Search for circuit which does not produce a momentary engine speed drop.

SEF190Y

© GO TO 12.

EC-358
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I

1. Turn ignition switch ON. GI
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.

MA

EM

LC

SEF366X

OK or NG
FE
OK © GO TO 4.
NG © Go to TROUBLE DIAGNOSIS FOR POWER SUPPLY, EC-118.
CL
4 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
MT
2. Disconnect condenser harness connector.

AT

AX

SU

BR
SEF275X
3. Turn ignition switch ON.
4. Check voltage between condenser terminal 1 and ground with CONSULT-II or tester. ST

RS

BT

HA

SEF367X SC
OK or NG
OK © GO TO 10. EL
NG © GO TO 5.
IDX

EC-359
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III

1. Turn ignition switch OFF.
2. Disconnect ECM relay.

SEF589PB
3. Check harness continuity between ECM relay terminal 7 and condenser terminal 1. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 7.
NG © GO TO 6.

6 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F18, E15
I Harness for open or short between ECM relay and condenser
© Repair open circuit or short to ground or short to power in harness or connectors.

7 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV

Check voltage between ECM relay terminal 6 and ground with CONSULT-II or tester.

SEF368X

OK or NG
OK © GO TO 9.
NG © GO TO 8.

8 DETECT MALFUNCTIONING PART

Check the following.
I 15A fuse
I Harness for open and short between ECM relay and fuse
© Repair or replace harness or connectors.

EC-360
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK ECM RELAY

1. Apply 12V direct current between ECM relay terminals 1 and 2. GI
2. Check continuity between ECM relay terminals 3 and 5, 6 and 7.

MA

EM

LC

SEF296X

OK or NG
OK © GO TO 17. FE
NG © Replace ECM relay.
CL
10 CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF. MT
2. Check harness continuity between condenser terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power. AT
OK or NG
OK © GO TO 11. AX
NG © Repair open circuit or short to power in harness or connectors.

SU
11 CHECK CONDENSER
Check resistance between condenser terminals 1 and 2.
BR

ST

RS

BT
SEF369X
HA
OK or NG
OK © GO TO 12.
NG © Replace condenser.
SC

EL

IDX

EC-361
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

12 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V

1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
3. Disconnect ignition coil harness connector.

SEF274XA
4. Turn ignition switch ON.
5. Check voltage between ignition coil terminal 3 and ground with CONSULT-II or tester.

SEF370X

OK or NG
OK © GO TO 14.
NG © GO TO 13.

13 DETECT MALFUNCTIONING PART

Check the harness for open or short between ignition coil and harness connector F18.
© Repair or replace harness or connectors.

14 CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.
2. Check harness continuity between ignition coil terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 15.
NG © Repair open circuit or short to power in harness or connectors.

EC-362
 DTC P1320 IGNITION SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

15 CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector. GI
2. Check harness continuity between ECM terminals 21, 22, 23, 30, 31, 32 and ignition coil terminal 1. Refer to Wiring
Diagram.
Continuity should exist. MA
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 16.
EM
NG © Repair open circuit or short to ground or short to power in harness or connectors.
LC
16 CHECK IGNITION COIL WITH POWER TRANSISTOR
Check resistance between ignition coil terminals 2 and 3.

FE

CL

MT

SEF371X AT
OK or NG
OK © GO TO 17. AX
NG © Replace ignition coil with power transistor.

SU
17 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
BR
© INSPECTION END

ST

RS

BT

HA

SC

EL

IDX

EC-363
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITH EURO-OBD
Component Description

Component Description NFEC0926

The crankshaft position sensor (REF) is located on the oil pan
(upper) facing the crankshaft pulley. It detects the TDC (Top Dead
Center) signal (120° signal).
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the
crankshaft pulley will periodically change. Permeability near the
sensor also changes.
Due to the permeability change, the magnetic flux near the core is
changed. Therefore, the voltage signal generated in the coil is
SEF253P
changed.
The ECM receives the voltage signal and detects the TDC signal
(120° signal).

CONSULT-II Reference Value in Data Monitor

Mode NFEC0927
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

CKPS·RPM (POS) I Tachometer: Connect

Almost the same speed as the
I Run engine and compare tachometer indication with the CONSULT-II
CONSULT-II value.
ENG SPEED value.

On Board Diagnosis Logic NFEC0928

Malfunction is detected when
(Malfunction A) 120° signal is not entered to ECM for the first few
seconds during engine cranking,
(Malfunction B) 120° signal is not entered to ECM during engine
running,
(Malfunction C) 120° signal cycle excessively changes during
engine running.
FAIL-SAFE MODE NFEC0928S01
When the ECM enters the fail-safe mode, the MIL illuminates.
Detected items Engine operating condition in fail-safe mode

Crankshaft position sensor (REF) Compression TDC signal (120° signal) is controlled by camshaft position sensor (PHASE)
circuit signal and crankshaft position sensor (POS) signal. Ignition timing will be delayed 0° to 2°.

EC-364
DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITH EURO-OBD
Possible Cause

Possible Cause NFEC0929

I Harness or connectors
(The crankshaft position sensor (REF) circuit is open or GI
shorted.)
I Crankshaft position sensor (REF)
MA
I Starter motor (Refer to SC section.)
I Starting system circuit (Refer to SC section.)
I Dead (Weak) battery EM

LC
DTC Confirmation Procedure NFEC0930
NOTE:
I Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st
trip DTC cannot be confirmed, perform “PROCEDURE
FOR MALFUNCTION B AND C”. FE
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test. CL
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V at idle. MT
PROCEDURE FOR MALFUNCTION A NFEC0930S01
With CONSULT-II NFEC0930S0101
AT
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II. AX
3) Crank engine for at least 2 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-367. SU
With GST NFEC0930S0102
Follow the procedure “With CONSULT-II” above. BR
SEF065Y

PROCEDURE FOR MALFUNCTION B AND C NFEC0930S02 ST

With CONSULT-II NFEC0930S0201
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II. RS
3) Start engine and run it for at least 2 seconds at idle speed.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-367.
BT
With GST
Follow the procedure “With CONSULT-II” above.
NFEC0930S0202
HA
SEF058Y

SC

EL

IDX

EC-365
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0931

MEC455D

SEF861Y

EC-366
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure =NFEC0932

1 RETIGHTEN GROUND SCREWS GI

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
MA

EM

LC

SEF255X
FE
© GO TO 2.
CL
2 CHECK CKPS (REF) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect CKPS (REF) harness connector. MT

AT

AX

SU

SEF591PA BR
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 65, 75 and CKPS (REF) terminal 2. Refer to Wiring Diagram.
Continuity should exist. ST
4. Also check harness for short to ground and short to power.
OK or NG
RS
OK © GO TO 4.
NG © GO TO 3.
BT
3 DETECT MALFUNCTIONING PART
Check the following. HA
I Harness connectors F43, F191
I Harness for open or short between crankshaft position sensor (REF) and ECM
SC
© Repair open circuit or short to ground or short to power in harness or connectors.

EL

IDX

EC-367
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK CKPS (REF) GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Check harness continuity between CKPS (REF) terminal 1 and engine ground.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F43, F191
I Harness for open or short between crankshaft position sensor (REF) and engine ground
© Repair open circuit or short to power in harness or connector.

6 CHECK CKPS (REF)-I

1. Loosen the fixing bolts and remove the CKPS (REF).
2. Visually check the CKPS (REF) for chipping.

SEF585P

OK or NG
OK © GO TO 7.
NG © Replace crankshaft position sensor (REF).

7 CHECK CKPS (REF)-II

Check resistance between CKPS (REF) terminals 1 and 2.

SEF350X

OK or NG
OK © GO TO 8.
NG © Replace crankshaft position sensor (REF).

EC-368
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK CKPS (REF) SHIELD CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”. GI
2. Disconnect harness connectors F43, F191.
3. Check harness continuity between harness connector F43 terminal 4 and engine ground.
Continuity should exist. MA
4. Also check harness for short to power.
OK or NG
OK © GO TO 10.
EM
NG © GO TO 9.
LC
9 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors F43, F191
I Joint connector-18
I Harness for open or short between harness connector F43 and engine ground FE
© Repair open circuit or short to power in harness or connectors.
CL
10 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. MT
© INSPECTION END

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-369
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITH EURO-OBD
Component Description

Component Description NFEC0933

The crankshaft position sensor (POS) is located on the oil pan
facing the gear teeth (cogs) of the signal plate (flywheel). It detects
the crankshaft position signal (1° signal).
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the gear
teeth (cogs) will periodically change. Permeability near the sensor
also changes.
Due to the permeability change, the magnetic flux near the core is
changed. Therefore, the voltage signal generated in the coil is
SEF254P
changed.
The ECM receives the voltage signal and detects the crankshaft
position signal (1° signal).

CONSULT-II Reference Value in Data Monitor

Mode NFEC0934
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

CKPS·RPM (POS) I Tachometer: Connect

Almost the same speed as the
I Run engine and compare tachometer indication with the CONSULT-II
CONSULT-II value.
ENG SPEED value.

On Board Diagnosis Logic NFEC0935

Malfunction is detected when chipping of the signal plate (flywheel
or drive plate) gear tooth (cog) is detected by the ECM.

Possible Cause NFEC0936

I Harness or connectors
I Crankshaft position sensor (POS)
I Signal plate (Drive plate/Flywheel)

EC-370
DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITH EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0937

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, GI
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
MA
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V. EM

LC
WITH CONSULT-II NFEC0937S01
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2) Start engine and run it for at least 70 seconds at idle speed.
3) If 1st trip DTC is detected, go to “Diagnostic Procedure”, FE
EC-373.
WITH GST NFEC0937S02 CL
Follow the procedure “WITH CONSULT-II” above.

SEF058Y
MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-371
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0938

MEC462D

EC-372
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITH EURO-OBD
Wiring Diagram (Cont’d)

GI

MA

EM

LC

SEF856Y FE

CL

MT
Diagnostic Procedure NFEC0939
AT
1 RETIGHTEN GROUND SCERWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws. AX

SU

BR

ST

SEF255X RS

© GO TO 2.
BT

HA

SC

EL

IDX

EC-373
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK CKPS (POS) POWER SUPPLY CIRCUIT

1. Disconnect harness connectors F25, F171.

SEF511WB
2. Check voltage between harness connector F25 terminal 4 and ground with CONSULT-II or tester.

SEF323X
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F25, F171
I Harness connectors E15, F18
I Harness for open or short between ECM and crankshaft position sensor (POS)
I Harness for open or short between ECM relay and crankshaft position sensor (POS)
© Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK CKPS (POS) GROUND CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between harness connector F25 terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to power in harness or connectors.

EC-374
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK CKPS (POS) INPUT SIGNAL CIRCUIT

1. Disconnect ECM harness connector. GI
2. Check harness continuity between ECM terminal 85 and harness connector F25 terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power. MA
OK or NG
OK © GO TO 6.
EM
NG © Repair open circuit or short to ground or short to power in harness or connectors.

LC
6 CHECK CKPS (POS) SUB-HARNESS CIRCUIT FOR OPEN AND SHORT
1. Disconnect CKPS (POS) harness connector.

FE

CL

MT

SEF367Q
2. Check harness continuity between CKPS (POS) terminals and harness connector F171 terminals as follows. AT

AX

SU
MTBL0352
Continuity should exist.
3. Also check harness for short to ground and short to power. BR
OK or NG
OK © GO TO 7.
ST
NG © Repair open circuit or short to ground or short to power in harness or connectors.

RS
7 CHECK CKPS (POS) INSTALLATION
Check that CKPS (POS) and HO2S1 bank 2 harness clamp are installed correctly as shown below.
BT

HA

SC

EL
SEM222FE

OK or NG IDX
OK © GO TO 8.
NG © Install CKPS (POS) correctly.

EC-375
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK IMPROPER INSTALLATION

1. Loosen and retighten the fixing bolt of the crankshaft position sensor (POS).
2. Reconnect harness connectors disconnected.
3. Perform “DTC Confirmation Procedure”, EC-371 again.
Is a 1st trip DTC P1336 detected?
Yes © GO TO 9.
No © INSPECTION END

9 CHECK CRANKSHAFT POSITION SENSOR (POS)

1. Disconnect crankshaft position sensor (POS) harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.

SEF587P

OK or NG
OK © GO TO 10.
NG © Replace crankshaft position sensor (POS).

10 CHECK CRANKSHAFT POSITION SENSOR (POS)-II

1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminal 85 and ground by briefly touching the sensor core with a flat-bladed screwdriver.

SEF324X

OK or NG
OK © GO TO 11.
NG © Replace crankshaft position sensor (POS).

EC-376
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

11 CHECK CKPS (POS) SHIELD CIRCUIT FOR OPEN AND SHORT

1. Disconnect harness connectors F25, F171. GI
2. Check harness continuity between harness connector F25 terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power. MA
OK or NG
OK © GO TO 13.
EM
NG © GO TO 12.

LC
12 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors F25, F171
I Joint connector-18
I Harness for open or short between harness connector F25 and engine ground
© Repair open circuit or short to power in harness or connectors.
FE

13 CHECK GEAR TOOTH CL

Visually check for chipping signal plate (flywheel or drive plate) gear tooth (cog).
OK or NG MT
OK © GO TO 14.
NG © Replace the signal plate (flywheel or drive plate). AT

14 CHECK INTERMITTENT INCIDENT AX

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END
SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-377
 DTC P1605 A/T DIAGNOSIS COMMUNICATION
LINE WITH EURO-OBD
Component Description

Component Description NFEC0940

The malfunction information related to A/T (Automatic Transmission) is transferred through the line (circuit)
from TCM (Transmission control module) to ECM. Therefore, be sure to erase the malfunction information such
as DTC not only in TCM (Transmission control module) but also ECM after the A/T related repair.

On Board Diagnosis Logic NFEC0941

Malfunction is detected when an incorrect signal from TCM (Trans-
mission control module) is sent to ECM.

Possible Cause NFEC0942

I Harness or connectors
[The communication line circuit between ECM and TCM
(Transmission control module) is open or shorted.]
I Dead (Weak) battery
I TCM (Transmission control module)

DTC Confirmation Procedure NFEC0943

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V at idle.
WITH CONSULT-II NFEC0943S01

SEF058Y
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and wait at least 40 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-380.
WITH GST NFEC0943S02
Follow the procedure “WITH CONSULT-II” above.

EC-378
DTC P1605 A/T DIAGNOSIS COMMUNICATION
LINE WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0944

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC009D
HA

SC

EL

IDX

SEF048YA

EC-379
 DTC P1605 A/T DIAGNOSIS COMMUNICATION
LINE WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0945

1 CHECK A/T DIAGNOSIS COMMUNICATION LINE INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and TCM (Transmission Control Module) harness connector.

SEF038YA

SEF271X
3. Check harness continuity between ECM terminal 60 and TCM terminal 15. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 2.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

2 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-380
 DTC P1706 PARK/NEUTRAL POSITION (PNP)
SWITCH WITH EURO-OBD
Component Description

Component Description NFEC0946

When the gear position is “P” or “N”, park/neutral position (PNP)
switch is “ON”. GI
ECM detects the position because the continuity of the line (the
“ON” signal) exists.
The park/neutral position (PNP) switch assembly also includes a MA
transmission range switch to detect selector lever position.
EM

AEC877A LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC0947
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
Shift lever: “P” or “N” ON
P/N POSI SW I Ignition switch: ON
Except above OFF CL

MT
On Board Diagnosis Logic NFEC0948
Malfunction is detected when the signal of the park/neutral position AT
(PNP) switch is not changed in the process of engine starting and
driving.
AX

SU

BR

Possible Cause NFEC0949 ST

I Harness or connectors
[The park/neutral position (PNP) switch circuit is open or
shorted.] RS
I Park/neutral position (PNP) switch

BT

HA

DTC Confirmation Procedure NFEC0950

SC
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
EL
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds IDX
before conducting the next test.

EC-381
 DTC P1706 PARK/NEUTRAL POSITION (PNP)
SWITCH WITH EURO-OBD
DTC Confirmation Procedure (Cont’d)
WITH CONSULT-II NFEC0950S01
1) Turn ignition switch “ON”.
2) Select “P/N POSI SW” in “DATA MONITOR” mode with CON-
SULT-II. Then check the “P/N POSI SW” signal under the fol-
lowing conditions.
Position (Selector lever) Known-good signal

“N” and “P” position ON

Except the above position OFF

SEF212Y If NG, go to “Diagnostic Procedure”, EC-384.

If OK, go to following step.
3) Select “DATA MONITOR” mode with CONSULT-II.
4) Start engine and warm it up to normal operating temperature.
5) Maintain the following conditions for at least 60 consecutive
seconds.
ENG SPEED 1,400 - 4,000 rpm

COOLAN TEMP/S More than 70°C (158°F)

B/FUEL SCHDL 2 - 10 msec

SEF213Y VHCL SPEED SE More than 65 km/h (40 MPH)

Selector lever Suitable position

6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,

EC-384.

Overall Function Check NFEC0951

Use this procedure to check the overall function of the park/neutral
position (PNP) switch circuit. During this check, a 1st trip DTC
might not be confirmed.
WITH GST NFEC0951S01
1) Turn ignition switch “ON”.
2) Check voltage between ECM terminal 44 and body ground
under the following conditions.
Condition (Gear position) Voltage V (Known good data)
SEF359X
“P” and “N” position Approx. 0

Except the above position Battery voltage

3) If NG, go to “Diagnostic Procedure”, EC-384.

EC-382
DTC P1706 PARK/NEUTRAL POSITION (PNP)
SWITCH WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0952

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC454D
HA

SC

EL

IDX

SEF973XA

EC-383
 DTC P1706 PARK/NEUTRAL POSITION (PNP)
SWITCH WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0953

1 CHECK PNP SWITCH GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect park/neutral position (PNP) switch harness connector.

SEF279X
3. Check harness continuity between PNP switch terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK © GO TO 3.
NG © GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F10, F151
I Harness for open or short between park/neutral position (PNP) switch and engine ground
© Repair open circuit or short to power in harness or connectors.

3 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 44 and PNP switch terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 5.
NG © GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F10, F151
I Harness for open or short between ECM and park/neutral position (PNP) switch
© Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK PARK/NEUTRAL POSITION (PNP) SWITCH

Refer to AT-443, “Diagnostic Procedure”.
OK or NG
OK © GO TO 6.
NG © Replace park/neutral position (PNP) switch.

EC-384
 DTC P1706 PARK/NEUTRAL POSITION (PNP)
SWITCH WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. GI
© INSPECTION END

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-385
 ABSOLUTE PRESSURE SENSOR WITH EURO-OBD
Component Description

Component Description NFEC0954

The absolute pressure sensor detects ambient barometric pressure
and sends the voltage signal to the ECM. As the pressure
increases, the voltage rises.

SEF052V

SEF946SA

EC-386
ABSOLUTE PRESSURE SENSOR WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0955

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC464D
HA

SC

EL

IDX

SEF651XB

EC-387
 ABSOLUTE PRESSURE SENSOR WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0956

1 CHECK OVERALL FUNCTION

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 80 and ground with CONSULT-II or tester.

SEF055Y

OK or NG
OK © INSPECTION END
NG © GO TO 2.

2 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 3.

EC-388
 ABSOLUTE PRESSURE SENSOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK ABSOLUTE PRESSURE SENSOR CONNECTOR FOR WATER

1. Disconnect absolute pressure sensor harness connector. GI

MA

EM

LC

SEF257X
2. Check sensor harness connector for water.
Water should not exist.
OK or NG FE
OK © GO TO 4.
NG © Repair or replace harness connector. CL

4 CHECK ABSOLUTE PRESSURE SENSOR POWER SUPPLY CIRCUIT MT

1. Turn ignition switch “ON”.
2. Check voltage between absolute pressure sensor terminal 1 and ground with CONSULT-II or tester.
AT

AX

SU

BR
SEF299X

OK or NG ST
OK © GO TO 5.
NG © Repair harness or connectors. RS

5 CHECK ABSOLUTE PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT BT
1. Turn ignition switch “OFF”.
2. Check harness continuity between absolute pressure sensor terminal 3 and engine ground.
Refer to Wiring Diagram. HA
Continuity should exist.
3. Also check harness for short to power.
SC
OK or NG
OK © GO TO 7.
EL
NG © GO TO 6.

IDX

EC-389
 ABSOLUTE PRESSURE SENSOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 DETECT MALFUNCTIONING PART

Check the following.
I Harness for open or short between ECM and absolute pressure sensor
I Harness for open or short between TCM (Transmission Control Module) and absolute pressure sensor
© Repair open circuit or short to power in harness or connectors.

7 CHECK ABSOLUTE PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 80 and absolute pressure sensor terminal 2.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK ABSOLUTE PRESSURE SENSOR

1. Remove absolute pressure sensor with its harness connector connected.
2. Remove hose from absolute pressure sensor.
3. Install a vacuum pump to absolute pressure sensor.
4. Turn ignition switch “ON” and check output voltage between ECM terminal 80 and engine ground under the following
conditions.

SEF300XB
CAUTION:
I Always calibrate the vacuum pump gauge when using it.
I Do not apply below −93.3 kPa (–933 bar, –700 mmHg, –27.56 inHg) or over 101.3 kPa (1,013 bar, 760 mmHg,
29.92 inHg) of pressure.
OK or NG
OK © GO TO 9.
NG © Replace absolute pressure sensor.

EC-390
 ABSOLUTE PRESSURE SENSOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK ABSOLUTE PRESSURE SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Disconnect joint connector-18.
3. Check the following.
I Continuity between joint connector terminal 2 and ground MA
Refer to Wiring Diagram.
I Joint connector
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
EM
4. Also check harness for short to power.
5. Then reconnect joint connector-18.
LC
OK or NG
OK © GO TO 10.
NG © Repair open circuit or short to power in harness or connectors.

FE
10 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END
CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-391
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITH EURO-OBD
Description

Description NFEC0979
SYSTEM DESCRIPTION NFEC0979S01

Sensor Input Signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperature

Ignition switch Start signal EVAP canister

EVAP canister purge vol-
Throttle position sensor Throttle position purge flow con-
ume control solenoid valve
trol
Throttle position switch Closed throttle position

Density of oxygen in exhaust gas

Heated oxygen sensor 1 (front)
(Mixture ratio feedback signal)

Fuel tank temperature sensor Fuel temperature in fuel tank

Vehicle speed sensor Vehicle speed

This system controls flow rate of fuel vapor from the EVAP canis-
ter. The opening of the vapor by-pass passage in the EVAP canis-
ter purge volume control solenoid valve changes to control the flow
rate. The EVAP canister purge volume control solenoid valve
repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control.
The optimum value stored in the ECM is determined by consider-
ing various engine conditions. When the engine is operating, the
flow rate of fuel vapor from the EVAP canister is regulated as the
air flow changes.

COMPONENT DESCRIPTION NFEC0979S02

The EVAP canister purge volume control solenoid valve uses a
ON/OFF duty to control the flow rate of fuel vapor from the EVAP
canister. The EVAP canister purge volume control solenoid valve
is moved by ON/OFF pulses from the ECM. The longer the ON
pulse, the greater the amount of fuel vapor that will flow through the
valve.

SEF337U

CONSULT-II Reference Value in Data Monitor

Mode NFEC0980
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Engine: After warming up Idle (Vehicle stopped) 0%

I Air conditioner switch “OFF”
PURG VOL C/V
I Shift lever: “N”
I No-load 2,000 rpm —

EC-392
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0981

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

MEC070D RS

BT

HA

SC

EL

IDX

SEF858Y

EC-393
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0982

1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes © GO TO 2.
No © GO TO 3.

2 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE CONTROL FUNCTION
With CONSULT-II
1. Turn ignition switch “OFF”.
2. Disconnect the EVAP purge hose connected to the EVAP canister purge volume control solenoid valve at the EVAP
canister.
3. Turn ignition switch “ON” and select “PURG VOL CONT/V” in “DATA MONITOR” mode with CONSULT-II.
4. Start engine and let it idle.
5. Change the valve opening percentage “Qu” and “Qd” and check for vacuum existence under the following conditions.

SEF156Z

OK or NG
OK © GO TO 4.
NG © GO TO 5.

3 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE CONTROL FUNCTION
Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Disconnect the EVAP purge hose connected to the EVAP canister purge volume control solenoid valve at the EVAP
canister.
3. Start engine and let it idle for at least 80 seconds.
4. Check for vacuum existence at the EVAP purge hose under the following conditions.

SEF019Y

OK or NG
OK © GO TO 4.
NG © GO TO 5.

EC-394
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK EVAP CANISTER

1. Turn ignition switch “OFF”. GI
2. Remove EVAP canister.
3. Block port B of EVAP canister.
4. Blow air through port A orally, and confirm that air flows freely through port C with check valve resistance. MA
5. Block port A of EVAP canister.
6. Blow air through port B orally, and confirm that air flows freely through port C.
EM

LC

FE
SEF917W

OK or NG CL
OK © INSPECTION END
NG © Replace EVAP canister. MT

5 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT AT
1. Turn ignition switch “OFF”.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
AX

SU

BR

ST
SEF266X
3. Turn ignition switch “ON”. RS
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 2 and ground with CONSULT-II or
tester.
BT

HA

SC

EL
SEF998X

OK or NG IDX
OK © GO TO 7.
NG © GO TO 6.

EC-395
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connector M19
I 15A fuse
I Harness for open or short between EVAP canister purge volume control solenoid valve and fuse
© Repair harness or connectors.

7 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 1 and EVAP canister purge volume control solenoid valve terminal 1.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT-II) © GO TO 8.
OK (Without CONSULT- © GO TO 9.
II)
NG © Repair open circuit or short to ground and short to power in harness or connetors.

8 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT-II
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that engine speed varies according
to the valve opening.

SEF677Y

OK or NG
OK © GO TO 10.
NG © GO TO 9.

EC-396
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-II GI
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

MA

EM

LC

SEF334X

Without CONSULT-II FE
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

CL

MT

AT

AX
SEF335X

OK or NG
OK © GO TO 10.
SU
NG © Replace EVAP canister purge volume control solenoid valve.
BR
10 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. ST
© INSPECTION END
RS

BT

HA

SC

EL

IDX

EC-397
 A/T COMMUNICATION LINE WITH EURO-OBD
System Description

System Description NFEC0993

These circuit lines are used to control the smooth shifting up and down of A/T during the hard acceleration/
deceleration.
Voltage signals are exchanged between ECM and TCM (Transmission Control Module).

EC-398
A/T COMMUNICATION LINE WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0994

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC073D
HA

SC

EL

IDX

SEF043YA

EC-399
 A/T COMMUNICATION LINE WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0995

1 CHECK OVERALL FUNCTION

1. Start engine and warm it up to normal operating temperature.
2. Check the voltage between ECM terminals 36, 37, 68, 77, 78 and ground.

SEF024Y

OK or NG
OK © INSPECTION END
NG © GO TO 2.

EC-400
 A/T COMMUNICATION LINE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR OPEN

1. Turn ignition switch “OFF”. GI
2. Disconnect ECM harness connector and TCM (Transmission Control Module) harness connector.

MA

EM

LC

SEF044Y

FE

CL

MT

AT
SEF271X
3. Check harness continuity between the following terminals.
AX

SU

BR
MTBL0405
Refer to Wiring Diagram.
Continuity should exist. ST
OK or NG
OK © GO TO 3. RS
NG © Repair harness or connectors.

BT
3 CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR SHORT
1. Check harness continuity between ECM terminals 36, 37, 68, 77, 78 and ground.
Refer to Wiring Diagram.
HA
Continuity should not exist.
2. Also check harness for short to power.
SC
OK or NG
OK © GO TO 4.
EL
NG © Repair short to ground or short to power in harness or connectos.

4 CHECK INTERMITTENT INCIDENT

IDX
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-401
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Description

Description NFEC0996
SYSTEM DESCRIPTION NFEC0996S01

Sensor Input Signal to ECM ECM function Actuator

Throttle position sensor Throttle position

Ignition switch Start signal Swirl control valve control

solenoid valve
Crankshaft position sensor (POS) Engine speed (POS signal) Swirl control " Vacuum signal
Crankshaft position sensor (REF) Engine speed (REF signal) valve control Swirl control valve actuator
"
Mass air flow sensor Amount of intake air Swirl control valve

Engine coolant temperature sensor Engine coolant temperature

This system has a swirl control valve in the intake passage of each
cylinder.
While idling and during low engine speed operation, the swirl con-
trol valve closes. Thus the velocity of the air in the intake passage
increases, promoting the vaporization of the fuel and producing a
swirl in the combustion chamber.
Because of this operation, this system tends to increase the burn-
ing speed of the gas mixture, improve fuel consumption, and
increase the stability in running conditions.
Also, except when idling and during low engine speed operation,
this system opens the swirl control valve. In this condition, this
system tends to increase power by improving intake efficiency via
reduction of intake flow resistance, intake flow.
The solenoid valve controls swirl control valve’s shut/open condi-
tion. This solenoid valve is operated by the ECM.
Throttle position Swirl control valve
sensor (Idle posi- Engine speed control solenoid Swirl control valve
tion) valve

ON Below 3,200 rpm ON Closed

Less than 3,200

ON Closed
rpm
OFF
More than 3,600
OFF Open
rpm

When engine coolant temperature is below 10°C (50°F) and above 55°C (131°F),
swirl control valve is kept open regardless of above condition.

SEF045Y

EC-402
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Description (Cont’d)
COMPONENT DESCRIPTION NFEC0996S02
Swirl Control Valve Control Solenoid Valve NFEC0996S0201
The swirl control valve control solenoid valve responds to signals GI
from the ECM. When the ECM sends an ON (ground) signal, the
solenoid valve is bypassed to apply intake manifold vacuum to the
swirl control valve actuator. This operation closes the swirl control MA
valve. When the ECM sends an OFF signal, the vacuum signal is
cut and the swirl control valve opens.
EM

SEF272X LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC0997
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
Engine coolant temperature is
between 15°C (59°F) to 50°C ON
SWRL CONT S/V I Engine speed: Idle (122°F). CL
Engine coolant temperature is
OFF
above 55°C (131°F).
MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-403
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0998

MEC074D

SEF627XB

EC-404
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0999

1 INSPECTION START GI
Do you have CONSULT-II?
Yes or No MA
Yes © GO TO 2.
No © GO TO 3.
EM
2 CHECK OVERALL FUNCTION
LC
With CONSULT-II
1. Start engine and let it idle.
2. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON” and “OFF” alternately on CONSULT-II screen.
4. Make sure the swirl control valve actuator rod moves according to “SWIRL CONT SOL/V”.
FE

CL

MT

AT
SEF621X

OK or NG AX
OK © INSPECTION END
NG © GO TO 4. SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-405
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK OVERALL FUNCTION

Without CONSULT-II
1. Turn ignition switch “ON”.
2. Confirm that the voltage between ECM terminal 70 (Engine coolant temperature sensor signal) and ground is more
than 2.72V. If the voltage is out of range, cool the engine down.

SEF016Y
3. Start engine and let it idle.
4. Make sure the swirl control valve actuator rod moves when revving to over 3,200 rpm from idle.

SEF621X

OK or NG
OK © INSPECTION END
NG © GO TO 5.

EC-406
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK VACUUM SOURCE

With CONSULT-II GI
1. Turn ignition switch “OFF”.
2. Disconnect the vacuum hose connected to the swirl control valve actuator at vacuum tank.
3. Start engine and let it idle. MA
4. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
5. Touch “ON” and “OFF” alternately on CONSULT-II screen.
6. Check vacuum existence under the following conditions.
EM

LC

FE

SEF026Y
CL
OK or NG
OK © GO TO 6.
MT
NG © GO TO 7.

AT
5 CHECK VACUUM SOURCE
Without CONSULT-II
1. Turn ignition switch “OFF”. AX
2. Disconnect the swirl control valve control solenoid valve harness connector.
3. Disconnect the vacuum hose connected to the swirl control valve actuator at vacuum tank.
4. Start engine and let it idle. SU
5. Apply 12V of direct current between swirl control valve control solenoid valve terminals 1 and 2.
6. Check vacuum existence under the following conditions.
BR

ST

RS

BT
SEF027Y

OK or NG
HA
OK © GO TO 6.
NG © GO TO 8. SC

EL

IDX

EC-407
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK VACUUM HOSES AND TUBES

1. Turn ignition switch “OFF”.
2. Remove vacuum hoses between the swirl control valve actuator and the vacuum tank.
3. Check hoses and tubes for cracks, clogging, improper connection or disconnection.

SEF109L

OK or NG
OK © Repair or replace swirl control valve actuator.
NG © Repair or replace vacuum hoses or tubes.

7 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE CIRCUIT

With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON” and “OFF” alternately on CONSULT-II screen.

SEF069Y
4. Make sure that clicking sound is heard from the swirl control valve control solenoid valve.
OK or NG
OK © GO TO 11.
NG © GO TO 8.

EC-408
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. GI
2. Disconnect swirl control valve control solenoid valve harness connector.

MA

EM

LC

SEF272X
3. Turn ignition switch “ON”.
4. Check voltage between swirl control valve control solenoid valve terminal 1 and ground with CONSULT-II or tester. FE

CL

MT

AT

SEF619X
AX
OK or NG
OK © GO TO 10.
SU
NG © GO TO 9.

9 DETECT MALFUNCTIONING PART

BR
Check the following.
I Harness connectors M46, F44 ST
I 15A fuse
I Harness for open or short between swirl control valve control solenoid valve and fuse
© Repair harness or connectors. RS

10 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN BT
AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector. HA
3. Check harness continuity between ECM terminal 29 and swirl control valve control solenoid valve terminal 2. Refer to
Wiring Diagram.
Continuity should exist. SC
4. Also check harness for short to ground and short to power.
OK or NG EL
OK © GO TO 11.
NG © Repair open circuit, short to ground or short to power in harness connectors.
IDX

EC-409
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITH EURO-OBD
Diagnostic Procedure (Cont’d)

11 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE

With CONSULT-II
1. Reconnect the disconnected harness connectors.
2. Start engine and let it idle.
3. Remove vacuum hose connected to swirl control valve actuator.
4. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
5. Touch “ON” and “OFF” on CONSULT-II screen.
6. Check vacuum existence and operation delay time under the following conditions.

SEF046Y

Without CONSULT-II
1. Reconnect ECM harness connector.
2. Remove vacuum hose connected to swirl control valve actuator.
3. Start engine and let it idle.
4. Apply 12V of direct current between swirl control valve control solenoid valve terminals 1 and 2.
5. Check vacuum existence and operation delay time under the following conditions.

SEF047Y

OK or NG
OK © GO TO 12.
NG © Replace intake manifold collector assembly.

12 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-410
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITH EURO-OBD
Description

Description NFEC1010
SYSTEM DESCRIPTION NFEC1010S01
GI
Sensor Input Signal to ECM ECM function Actuator

Mass air flow sensor Amount of intake air MA

Throttle position sensor Throttle position

Closed throttle position Throttle valve idle position EM

Ignition switch Start signal VIAS control VIAS control solenoid valve

Crankshaft position sensor (POS) Engine speed (POS signal) LC

Crankshaft position sensor (REF) Engine speed (REF signal)

Engine coolant temperature sensor Engine coolant temperature

FE

CL

MT

AT

AX

SU

BR
SEF599X

When the engine is running at low or medium speed, the power ST

valve is fully closed. Under this condition, the effective suction port
length is equivalent to the total length of the intake manifold collec-
tor’s suction port including the intake valve. This long suction port RS
provides increased air intake which results in improved suction
efficiency and higher torque generation.
The surge tank and one-way valve are provided. When engine is BT
running at high speed, the ECM sends the signal to the VIAS con-
trol solenoid valve. This signal introduces the intake manifold
vacuum into the power valve actuator and therefore opens the
HA
power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the SC
length of the suction port provided independently for each cylinder.
This shortened port length results in enhanced engine output with
reduced suction resistance under high speeds. EL

IDX

EC-411
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITH EURO-OBD
Description (Cont’d)
COMPONENT DESCRIPTION NFEC1010S02
Power Valve NFEC1010S0201
The power valve is installed in intake manifold collector and used
to control the suction passage of the variable induction air control
system. It is set in the fully closed or fully opened position by the
power valve actuator operated by the vacuum stored in the surge
tank. The vacuum in the surge tank is controlled by the VIAS con-
trol solenoid valve.

SEF600X

VIAS Control Solenoid Valve NFEC1010S0202

The VIAS control solenoid valve cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF signals from
the ECM. When the solenoid is off, the vacuum signal from the
intake manifold is cut. When the ECM sends an ON signal the coil
pulls the plunger downward and feeds the vacuum signal to the
power valve actuator.

SEF288X

EC-412
VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC1011

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC862C
HA

SC

EL

IDX

SEF636XB

EC-413
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC1012

1 CHECK OVERALL FUNCTION

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.
3. Turn VIAS control solenoid valve “ON” and “OFF”, and make sure that power valve actuator rod moves.

SEC236C

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Rev engine quickly up to above 5,000 rpm and make sure that power valve actuator rod moves.

SEF052Y

OK or NG
OK © INSPECTION END
NG © GO TO 2.

EC-414
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Stop engine. GI
2. Disconnect VIAS control solenoid valve harness connector.

MA

EM

LC

SEF288X
3. Turn ignition switch “ON”.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester. FE

CL

MT

AT

SEF603X
AX
OK or NG
OK © GO TO 4.
SU
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

BR
Check the following.
I Harness connectors M46, F44 ST
I 15A fuse
I Harness continuity between fuse and VIAS control solenoid valve
© Repair harness or connectors. RS

4 CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT BT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 16 and terminal 2. Refer to Wiring Diagram. HA
Continuity should exist.
4. Also check harness for short to ground and short to power.
SC
OK or NG
OK © GO TO 5.
EL
NG © Repair open circuit or short to ground or short to power in harness or connectors.

IDX

EC-415
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 RETEST OVERALL FUNCTION

1. Reconnect harness connectors disconnected.
2. Perform Test No. 1 again.
OK or NG
OK © INSPECTION END
NG © GO TO 6.

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
OK or NG
OK © Replace VIAS control solenoid valve as intake manifold collector assembly.
NG © Repair or replace harness or connectors.

EC-416
 INJECTOR WITH EURO-OBD
Component Description

Component Description NFEC1013

The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is GI
energized. The energized coil pulls the needle valve back and
allows fuel to flow through the injector into the intake manifold. The
amount of fuel injected depends upon the injection pulse duration. MA
Pulse duration is the length of time the injector remains open. The
ECM controls the injection pulse duration based on engine fuel
needs. EM

SEF812J LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC1014
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
I Engine: After warming up Idle 2.4 - 3.2 msec
INJ PULSE-B2 I Air conditioner switch: “OFF”
INJ PULSE-B1 I Shift lever: “N” CL
I No-load 2,000 rpm 1.9 - 2.8 msec

Idle 2.0 - 3.2 msec

B/FUEL SCHDL ditto
MT
2,000 rpm 1.4 - 2.6 msec

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-417
 INJECTOR WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC1015

MEC863C

SEF862Y

EC-418
 INJECTOR WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC1016

1 INSPECTION START GI
Turn ignition switch to “START”.
Is any cylinder ignited?
MA
Yes or No
Yes © GO TO 2.
No © GO TO 3.
EM

2 CHECK OVERALL FUNCTION LC

With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.

FE

CL

MT

AT
SEF070Y
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II AX
1. Start engine.
2. Listen to each injector operating sound.
SU

BR

ST

RS
MEC703B
Clicking noise should be heard. BT
OK or NG
OK © INSPECTION END HA
NG © GO TO 3.
SC

EL

IDX

EC-419
 INJECTOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK INJECTOR POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect injector harness connectors (bank 2) and harness connectors F43, F191 (bank 1).

SEF276X

SEF281XA
3. Turn ignition switch “ON”.
4. Check voltage between injector terminal 1 and ground, harness connector F43 terminal 5 and ground with CONSULT-II
or tester.

SEF897X

OK or NG
OK © GO TO 5.
NG © GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Harness connectors F43, F191
I Fuse block (J/B) connector M19
I 10A fuse
I Harness for open or short between injector and fuse
I Harness for open or short between harness connector F43 and fuse
© Repair harness or connectors.

EC-420
 INJECTOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”. GI
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 103, 104, 107, harness connector F191 termi-
nals 6, 2, 1 and ECM terminals 101, 105, 102. Refer to Wiring Diagram. MA
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG EM
OK © GO TO 7.
NG © GO TO 6. LC

6 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F43, F191
I Harness for open or short between harness connector F191 and ECM FE
I Harness for open or short between ECM and injector
© Repair open circuit or short to ground or short to power in harness or connectors.
CL
7 CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT (BANK 1)
MT
1. Remove intake manifold collector.
2. Disconnect injector harness connectors (bank 1).
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
AT

AX
MTBL0359
Continuity should exist. SU
OK or NG
OK © GO TO 8. BR
NG © Repair open circuit or short to ground or short to power in harness or connectors.

ST
8 CHECK INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
RS

BT

HA

SC

SEF964XA
EL
OK or NG
OK © GO TO 9. IDX
NG © Replace injector.

EC-421
 INJECTOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-422
 START SIGNAL WITH EURO-OBD
CONSULT-II Reference Value in Data Monitor Mode

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
NFEC1017
GI
MONITOR ITEM CONDITION SPECIFICATION
MA
START SIGNAL I Ignition switch: ON , START , ON OFF , ON , OFF

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-423
 START SIGNAL WITH EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC1018

MEC864C

SEF638XB

EC-424
 START SIGNAL WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC1019

1 INSPECTION START GI
Do you have CONSULT-II?
Yes or No MA
Yes © GO TO 2.
No © GO TO 3.
EM
2 CHECK OVERALL FUNCTION
LC
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “START SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.

FE

CL

MT

SEF072Y
AT
OK or NG
OK © INSPECTION END
AX
NG © GO TO 4.

SU
3 CHECK OVERALL FUNCTION
Without CONSULT-II
Check voltage between ECM terminal 42 and ground under the following conditions. BR

ST

RS

BT

SEF362X HA
OK or NG
OK © INSPECTION END SC
NG © GO TO 4.

EL
4 CHECK STARTING SYSTEM
Turn ignition switch “OFF”, then turn it to “START”.
Does starter motor operate? IDX
Yes or No
Yes © GO TO 5.
No © Refer to SC-12, “STARTING SYSTEM”.

EC-425
 START SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK FUSE
1. Turn ignition switch “OFF”.
2. Disconnect 10A fuse.
3. Check if 10A fuse is OK.
OK or NG
OK © GO TO 6.
NG © Replace 10A fuse.

6 CHECK START SIGNAL INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Disconnect ignition switch harness connector.
3. Check harness continuity between ECM terminal 42 and fuse block, ignition switch and fuse block. Refer to Wiring Dia-
gram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connectors M17, E83
I Harness for open or short between ignition switch and fuse
I Harness for open or short between ECM and fuse
© Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-426
 FUEL PUMP WITH EURO-OBD
System Description

System Description NFEC1020

Sensor Input Signal to ECM ECM function Actuator GI

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal) Fuel pump control Fuel pump relay MA
Ignition switch Start signal
EM
The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine
startability. If the ECM receives a 120° signal from the crankshaft position sensor (REF), it knows that the
engine is rotating, and causes the pump to operate. If the 120° signal is not received when the ignition switch LC
is on, the engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving
safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn
controls the fuel pump.
Condition Fuel pump operation

Ignition switch is turned to ON. Operates for 1 second. FE

Engine running and cranking Operates.

When engine is stopped Stops in 1.5 seconds. CL

Except as shown above Stops.
MT
Component Description NFEC1021
The fuel pump with a fuel damper is an in-tank type (the pump and AT
damper are located in the fuel tank).
AX

SU

BR
SEF605X

CONSULT-II Reference Value in Data Monitor ST

Mode NFEC1022
Specification data are reference values.
RS
MONITOR ITEM CONDITION SPECIFICATION

I Ignition switch is turned to ON. (Operates for 1 second.)

FUEL PUMP RLY I Engine running and cranking
ON BT
Except as shown above OFF
HA

SC

EL

IDX

EC-427
 FUEL PUMP WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC1023

MEC465D

SEF639XB

EC-428
 FUEL PUMP WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC1024

1 CHECK OVERALL FUNCTION GI

1. Turn ignition switch “ON”.
2. Pinch fuel feed hose with two fingers.
MA

EM

LC

SEC013C
Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned “ON”. FE
OK or NG
OK © INSPECTION END CL
NG © GO TO 2.
MT
2 CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. AT
2. Disconnect fuel pump relay.

AX

SU

BR

ST
SEF284X
3. Turn ignition switch “ON”.
4. Check voltage between terminals 1, 5 and ground with CONSULT-II or tester.
RS

BT

HA

SC

SEC646C
EL
OK or NG
OK © GO TO 4.
IDX
NG © GO TO 3.

EC-429
 FUEL PUMP WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 DETECT MALFUNCTIONING PART

Check the following.
I Fuse block (J/B) connector B5
I 10A fuse
I 15A fuse
I Harness for open or short between fuse and fuel pump relay
© Repair harness or connectors.

4 CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit and fuel pump harness connector.

SEF263X
3. Check harness continuity between fuel pump terminal 3 and body ground, fuel pump terminal 1 and fuel pump relay
terminal 3. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness for open or short between fuel pump relay and fuel pump
I Harness for open or short between fuel pump and body ground
© Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 28 and fuel pump relay terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors B3, M6 or B4, M3
I Harness connectors M81, F49
I Harness for open or short between ECM and fuel pump relay
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-430
 FUEL PUMP WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK FUEL PUMP RELAY

With CONSULT-II GI
1. Reconnect fuel pump relay, fuel level sensor unit and fuel pump harness connector and ECM harness connector.
2. Turn ignition switch “ON”.
3. Turn fuel pump relay “ON” and “OFF” in “ACTIVE TEST” mode with CONSULT-II and check operating sound. MA

EM

LC

SEF073Y
FE
Without CONSULT-II
Check continuity between terminals 3 and 5 under the following conditions. CL

MT

AT

AX

SEC648C SU
OK or NG
OK © GO TO 9. BR
NG © Replace fuel pump relay.

ST
9 CHECK FUEL PUMP
1. Disconnect fuel level sensor unit and fuel pump harness connector.
2. Check resistance between fuel level sensor unit and fuel pump terminals 1 and 3. RS

BT

HA

SC

SEF609X EL
OK or NG
OK © GO TO 10. IDX
NG © Replace fuel pump.

EC-431
 FUEL PUMP WITH EURO-OBD
Diagnostic Procedure (Cont’d)

10 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-432
 ELECTRONIC CONTROLLED ENGINE MOUNT WITH EURO-OBD
System Description

System Description NFEC1025

Sensor Input Signal to ECM ECM function Actuator GI

Crankshaft position sensor (POS) Engine speed (POS signal)
Engine mount Electronic controlled
Crankshaft position sensor (REF) Engine speed (REF signal)
control engine mount
MA
Vehicle speed sensor Vehicle speed
EM
The ECM controls the engine mount operation corresponding to
the engine speed and the vehicle speed. The control system has
2-step control [soft/hard]. LC
Vehicle condition Engine mount control

Idle (with vehicle stopped) Soft

Driving Hard

FE

CL

MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC1026
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
Idle “IDLE”
ENGINE MOUNT I Engine: Running
2,000 rpm “TRVL” SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-433
 ELECTRONIC CONTROLLED ENGINE MOUNT WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC1027

MEC866C

SEF640XB

EC-434
 ELECTRONIC CONTROLLED ENGINE MOUNT WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC1028

1 CHECK THE OVERALL FUNCTION GI

With CONSULT-II
1. After warming up engine, run it at idle speed.
2. Shift selector lever to “D” range while depressing the brake pedal and pulling the parking brake control lever. MA
3. Perform “ENGINE MOUNTING” in “ACTIVE TEST” mode with CONSULT-II and check that the body vibration changes
according to switching the condition (With vehicle stopped).
EM

LC

FE
SEC237C
CL
Without CONSULT-II
1. After warming up engine, run it at idle speed.
2. Shift selector lever to “D” range while depressing the brake pedal and pulling the parking brake control lever.
MT
3. Disconnect front or rear electronic controlled engine mount harness connector when engine speed is more than 1,000
rpm.
AT
View with intake air duct
Front electronic controlled
engine mount harness connector
Rear electronic controlled AX
engine mount harness connector

SU

Radiator cap
Battery
BR

SEF285X
4. When returning engine speed to idle speed, check that the body vibration increases, compared with the condition of the
ST
above step 2 (With vehicle stopped).
OK or NG RS
OK © INSPECTION END
NG © GO TO 2. BT

HA

SC

EL

IDX

EC-435
 ELECTRONIC CONTROLLED ENGINE MOUNT WITH EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK ELECTRONIC CONTROLLED ENGINE MOUNT POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect front or rear electronic controlled engine mount harness connector.
3. Check voltage between electronic controlled engine mount terminal 3 and ground with CONSULT-II or tester.

SEF899X

OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E15, F18
I 15A fuse
I Harness for open or short between electronic controlled engine mount and battery
© Repair harness or connectors.

4 CHECK ELECTRONIC CONTROLLED ENGINE MOUNT OUTPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 49 and electronic controlled engine mount terminal 1, ECM terminal
50 and electronic controlled engine mount terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit, short to ground or short to power in harness connectors.

5 CHECK ELECTRONIC CONTROLLED ENGINE MOUNT

Visually check front and rear electronic controlled engine mount.
OK or NG
OK © GO TO 6.
NG © Replace front or rear engine mount assembly.

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-436
 POWER STEERING OIL PRESSURE SWITCH WITH EURO-OBD
Component Description

Component Description NFEC1029

The power steering oil pressure switch is attached to the power
steering high-pressure tube and detects a power steering load. GI
When a power steering load is detected, it signals the ECM. The
ECM adjusts the IACV-AAC valve to increase the idle speed and
adjust for the increased load. MA

EM

SEF286X LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC1030
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
Steering wheel in neutral position
I Engine: After warming up, idle OFF
PW/ST SIGNAL (forward direction)
the engine CL
The steering wheel is fully turned. ON

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-437
 POWER STEERING OIL PRESSURE SWITCH WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC1031

MEC466D

SEF641XB

EC-438
 POWER STEERING OIL PRESSURE SWITCH WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC1032

1 INSPECTION START GI
Do you have CONSULT-II?
Yes or No MA
Yes © GO TO 2.
No © GO TO 3.
EM
2 CHECK OVERALL FUNCTION
LC
With CONSULT-II
1. Start engine.
2. Check “PW/ST SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.

FE

CL

MT

SEF311Y
AT
OK or NG
OK © INSPECTION END
AX
NG © GO TO 4.

SU
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine. BR
2. Check voltage between ECM terminal 47 and ground under the following conditions.

ST

RS

BT

HA
SEF363X

OK or NG
SC
OK © INSPECTION END
NG © GO TO 4.
EL

IDX

EC-439
 POWER STEERING OIL PRESSURE SWITCH WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK POWER STEERING OIL PRESSURE SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect power steering oil pressure switch harness connector.

SEF286X
3. Check harness continuity between power steering oil pressure switch terminal 1 and engine ground. Refer to Wiring
Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F17, E8
I Harness for open or short between power steering oil pressure switch and body ground
© Repair open circuit or short to power in harness or connectors.

6 CHECK POWER STEERING OIL PRESSURE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 47 and power steering oil pressure switch terminal 2. Refer to Wiring
Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F17, E8
I Harness for open or short between power steering oil pressure switch and ECM
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-440
 POWER STEERING OIL PRESSURE SWITCH WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK POWER STEERING OIL PRESSURE SWITCH

1. Disconnect power steering oil pressure switch harness connector then start engine. GI
2. Check continuity between power steering oil pressure switch terminals 1 and 2 under the following conditions.

MA

EM

LC

SEF364X

OK or NG
OK © GO TO 9. FE
NG © Replace power steering oil pressure switch.
CL
9 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. MT
© INSPECTION END

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-441
 REFRIGERANT PRESSURE SENSOR WITH EURO-OBD
Description

Description NFEC1033
The refrigerant pressure sensor is installed at the liquid tank of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan sys-
tem.

SEF287X

SEF099X

EC-442
REFRIGERANT PRESSURE SENSOR WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC1034

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC469D
HA

SC

EL

IDX

SEF643XC

EC-443
 REFRIGERANT PRESSURE SENSOR WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC1035

1 CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION

1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch “ON”.
3. Check voltage between ECM terminal 81 and ground with CONSULT-II or tester.

SEC014C

OK or NG
OK © INSPECTION END
NG © GO TO 2.

2 CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

1. Turn A/C switch and blower switch “OFF”.
2. Stop engine.
3. Disconnect refrigerant pressure sensor harness connector.

SEF287X
4. Turn ignition switch “ON”.
5. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.

SEF618X

OK or NG
OK © GO TO 4.
NG © GO TO 3.

EC-444
 REFRIGERANT PRESSURE SENSOR WITH EURO-OBD
Diagnostic Procedure (Cont’d)

3 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness connectors E15, F18
I Harness for open or short between ECM and refrigerant pressure sensor
© Repair harness or connectors. MA

4 CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT EM
1. Turn ignition switch “OFF”.
2. Check harness continuity between refrigerant pressure sensor terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist. LC
3. Also check harness for short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.
FE
5 DETECT MALFUNCTIONING PART
CL
Check the following.
I Harness connectors E8, F17
I Harness for open or short between ECM and refrigerant pressure sensor MT
I Harness for open or short between TCM (Transmission control module) and refrigerant pressure sensor
© Repair open circuit or short to power in harness or connectors.
AT
6 CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector. AX
2. Check harness continuity between ECM terminal 81 and refrigerant pressure sensor terminal 2. Refer to Wiring Dia-
gram.
Continuity should exist. SU
3. Also check harness for short to ground and short to power.
OK or NG BR
OK © GO TO 8.
NG © GO TO 7.
ST
7 DETECT MALFUNCTIONING PART
RS
Check the following.
I Harness connectors E8, F17
I Harness for open or short between ECM and refrigerant pressure sensor
BT
© Repair open circuit or short to ground or short to power in harness or connectors.

HA
8 CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-83, “Refrigerant pressure sensor”.
SC
OK or NG
OK © GO TO 9.
NG © Replace refrigerant pressure sensor.
EL

9 CHECK INTERMITTENT INCIDENT IDX

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-445
 ELECTRICAL LOAD SIGNAL WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC1036

MEC844D

SEF642XB

EC-446
 ELECTRICAL LOAD SIGNAL WITH EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC1037

1 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I GI

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 52 and ground under the following conditions.
MA

EM

LC

SEF610X

OK or NG
FE
OK © GO TO 2.
NG © GO TO 3. CL

2 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II MT

Check voltage between ECM terminal 52 and ground under the following conditions.
AT

AX

SU

BR
SEF611XA

OK or NG ST
OK © INSPECTION END
NG © GO TO 7.
RS
3 CHECK REAR WINDOW DEFOGGER FUNCTION
BT
1. Start engine.
2. Turn “ON” the rear window defogger switch.
3. Check the rear windshield. Is the rear windshield heated up? HA
Yes or No
Yes © GO TO 4.
SC
No © Refer to EL-199, “Rear Window Defogger”.

EL

IDX

EC-447
 ELECTRICAL LOAD SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between ECM terminal 52 and rear window defogger relay terminal 5.

SEF002Y
5. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors B1, M5
I Harness connectors M46, F44
I Diode M35
I Harness for open and short between ECM and rear window defogger relay
© Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

7 CHECK HEADLAMP FUNCTION

1. Start engine.
2. Turn the lighting switch “ON” at 2nd position with high beam.
3. Check that headlamps are illuminated.
OK or NG
OK (Models with con- © GO TO 8.
ventional type head-
lamp)
OK (Models with xenon © GO TO 10.
type headlamp)
NG © Refer to EL-41, EL-53, “System Description”.

EC-448
 ELECTRICAL LOAD SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1. Stop engine. GI
2. Disconnect ECM harness connector.
3. Disconnect daytime light control unit harness connector (Models with daytime light system), dimmer relay (Models with-
out daytime light system). MA
4. Check harness continuity between ECM terminal 52 and daytime light control unit terminal 4 or dimmer relay terminal 7
under the following conditions.
EM

LC

FE
SEC645C
5. Also check harness for short to ground and short to power.
CL
OK or NG
OK © GO TO 12.
MT
NG © GO TO 9.

9 DETECT MALFUNCTIONING PART

AT
Check the following.
I Harness connectors E81, M15 AX
I Harness connectors M46, F44
I Diode E79
I Harness for open and short between ECM and headlamp RH relay or dimmer relay SU
© Repair open circuit or short to ground or short to power in harness or connectors.

BR
10 CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector. ST
3. Disconnect headlamp LH relay.
4. Check harness continuity between ECM terminal 52 and headlamp LH relay terminal 5 under the following conditions.
RS

BT

HA

SC
SEF369Z
5. Also check harness for short to ground and short to power. EL
OK or NG
OK © GO TO 12. IDX
NG © GO TO 11.

EC-449
 ELECTRICAL LOAD SIGNAL WITH EURO-OBD
Diagnostic Procedure (Cont’d)

11 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E81, M15
I Harness connectors M46, F44
I Diode E79
I Harness for open and short between ECM and headlamp RH relay or headlamp LH relay
© Repair open circuit or short to ground or short to power in harness or connectors.

12 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.
© INSPECTION END

EC-450
MIL & DATA LINK CONNECTORS WITH EURO-OBD
Wiring Diagram

Wiring Diagram NFEC1038

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC845D

EC-451
 SERVICE DATA AND SPECIFICATIONS (SDS) WITH EURO-OBD
Fuel Pressure Regulator

Fuel Pressure Regulator NFEC1039

Fuel pressure at idling kPa (bar, kg/cm2, psi)

Vacuum hose is connected. Approximately 235 (2.35, 2.4, 34)

Vacuum hose is disconnected. Approximately 294 (2.94, 3.0, 43)

Idle Speed and Ignition Timing NFEC1040

Target idle speed*1 No-load*2 (in “P” or N” position) 700±50 rpm

Air conditioner: ON In “P” or N” position 825 rpm or more

In “P” or N” position 9°±5° BTDC (VQ20DE)

Ignition timing*1
15°±5° BTDC (VQ30DE)

Throttle position sensor idle position 0.15 - 0.85V

*1: Throttle position sensor harness connector connected

*2: Under the following conditions:
I Air conditioner switch: OFF
I Electric load: OFF (Lights, heater fan & rear window defogger)
I Steering wheel: Kept in straight-ahead position

Mass Air Flow Sensor NFEC1041

Supply voltage Battery voltage (11 - 14)V

Output voltage at idle 1.2 - 1.8*V

2.0 - 6.0 g·m/sec at idle*

Mass air flow (Using CONSULT-II)
7.0 - 20.0 g·m/sec at 2,500 rpm*

*: Engine is warmed up to normal operating temperature and running under no-load.

Engine Coolant Temperature Sensor NFEC1042

Temperature °C (°F) Resistance kΩ

20 (68) 2.1 - 2.9

50 (122) 0.68 - 1.00

90 (194) 0.236 - 0.260

Heated Oxygen Sensor 1 Heater (front) NFEC1043

Resistance [at 25°C (77°F)] 2.3 - 4.3Ω

Fuel Pump NFEC1044

Resistance [at 25°C (77°F)] 0.2 - 5.0Ω

IACV-AAC Valve NFEC1045

Resistance [at 20°C (77°F)] Approximately 22Ω

Injector NFEC1046

Resistance [at 20°C (68°F)] 14 - 15Ω

Resistor NFEC1047

Resistance [at 25°C (77°F)] Approximately 2.2 kΩ

EC-452
 SERVICE DATA AND SPECIFICATIONS (SDS) WITH EURO-OBD
Throttle Position Sensor

Throttle Position Sensor NFEC1048

Voltage GI
Throttle valve conditions (at normal operating temperature, engine off, ignition switch ON,
throttle opener disengaged)

Completely closed (a) 0.15 - 0.85V MA

Partially open Between (a) and (b)

Completely open (b) 3.5 - 4.7V EM

Calculated Load Value NFEC1049
LC
Calculated load value % (Using CONSULT-II)

At idle 14.0 - 33.0

At 2,500 rpm 12.0 - 25.0

Intake Air Temperature Sensor FE

NFEC1050

Temperature °C (°F) Resistance kΩ

CL
20 (68) 2.1 - 2.9

80 (176) 0.27 - 0.38

MT
Heated Oxygen Sensor 2 Heater (rear) NFEC1051

Resistance [at 25°C (77°F)] 2.3 - 4.3Ω AT

Crankshaft Position Sensor (REF) NFEC1052 AX

Resistance [at 20°C (68°F)] 470 - 570Ω

Fuel Tank Temperature Sensor SU

NFEC1053

Temperature °C (°F) Resistance kΩ

BR
20 (68) 2.3 - 2.7

50 (122) 0.79 - 0.90

ST
Camshaft Position Sensor (PHASE) NFEC1054

HITACHI make 1,440 - 7,760Ω RS

Resistance [at 20°C (68°F)]
MITSUBISHI make 2,090 - 2,550Ω
BT

HA

SC

EL

IDX

EC-453
 TROUBLE DIAGNOSIS — INDEX WITHOUT EURO-OBD
Alphabetical & P No. Index for DTC

Alphabetical & P No. Index for DTC NFEC0001

ALPHABETICAL INDEX FOR DTC NFEC0001S01
Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Vehicle identification number
(chassis number)” on the identification plate. Refer to GI-40, “VEHICLE IDENTIFICATION NUMBER
ARRANGEMENT”.
X: Applicable —: Not applicable

Items DTC
Reference page
(CONSULT-II screen terms) CONSULT-II ECM*1

Unable to access ECM — — EC-543

CMP SEN (CIRCUIT) P0340 0340 EC-617

COOLANT T SEN/CIRC P0115 0115 EC-581

CKP SENSOR (COG) P1336 1336 EC-651

CKP SEN/CIRCUIT P0335 0335 EC-609

CKP SEN (REF)/CIRC P1335 1335 EC-644

ECM P0605 0605 EC-623

ENG OVER TEMP P1217 1217 EC-626

HO2S1 (B1) P0130 0130 EC-595

HO2S1 (B2) P0150 0150 EC-595

KNOCK SEN/CIRC-B1 P0325 0325 EC-604

MAF SEN/CIRCUIT P0100 0100 EC-574

NATS MALFUNCTION P1610 - P1615 1610 - 1615 EL-380

NO DTC IS DETECTED.
FURTHER TESTING P0000 0000 —
MAY BE REQUIRED.

NO DTC IS DETECTED.
FURTHER TESTING No DTC Flashing*2 EC-495
MAY BE REQUIRED.

THRTL POS SEN/CIRC P0120 0120 EC-586

NOTE:
Regarding A33 models, “-B1” indicates right bank and “-B2” indicates left bank.
*1: In Diagnostic Test Mode II (Self-diagnostic results).
*2: While engine is running.

EC-454
 TROUBLE DIAGNOSIS — INDEX WITHOUT EURO-OBD
Alphabetical & P No. Index for DTC (Cont’d)
P NO. INDEX FOR DTC =NFEC0001S02
X: Applicable —: Not applicable

DTC
GI
Items
Reference page
CONSULT-II ECM*1 (CONSULT-II screen terms)
MA
— — Unable to access ECM EC-543

NO DTC IS DETECTED.
No DTC Flashing*2 FURTHER TESTING EC-495 EM
MAY BE REQUIRED.

NO DTC IS DETECTED. LC
P0000 0000 FURTHER TESTING —
MAY BE REQUIRED.

P0100 0100 MAF SEN/CIRCUIT EC-574

P0115 0115 COOLANT T SEN/CIRC EC-581

P0120 0120 THRTL POS SEN/CIRC EC-586 FE

P0130 0130 HO2S1 (B1) EC-595

P0150 0150 HO2S1 (B2) EC-595

CL
P0325 0325 KNOCK SEN/CIRC-B1 EC-604
MT
P0335 0335 CKP SEN/CIRCUIT EC-609

P0340 0340 CMP SEN/CIRCUIT EC-617

AT
P0605 0605 ECM EC-623

P1217 1217 ENG OVER TEMP EC-626

AX
P1335 1335 CKP SEN (REF)/CIRC EC-644

P1336 1336 CKP SENSOR (COG) EC-651

SU
P1610 - P1615 1610 - 1615 NATS MALFUNCTION EL-380
NOTE:
Regarding A33 models, “-B1” indicates right bank and “-B2” indicates left bank.
BR
*1: In Diagnostic Test Mode II (Self-diagnostic results).
*2: While engine is running.
ST

RS

BT

HA

SC

EL

IDX

EC-455
 PRECAUTIONS WITHOUT EURO-OBD
Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”

Supplemental Restraint System (SRS) “AIR

BAG” and “SEAT BELT PRE-TENSIONER” NFEC0653
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL A33 is as follows (The compo-
sition varies according to the destination and optional equipment.):
I For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring
harness, warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
I To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
I Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
I Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified with yellow harness connector (and with
yellow harness protector or yellow insulation tape before the harness connectors).
Precautions for On Board Diagnostic (OBD)
System of Engine NFEC0003
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
I Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MIL to light up.
I Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
I Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to EL section,
“Description”, “HARNESS CONNECTOR”.
I Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MIL to light up due to the short circuit.
I Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM before
returning the vehicle to the customer.

EC-456
PRECAUTIONS WITHOUT EURO-OBD
Engine Fuel & Emission Control System

Engine Fuel & Emission Control System NFEC0004

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SEF242X

EC-457
 PRECAUTIONS WITHOUT EURO-OBD
Precautions

Precautions NFEC0005
I Before connecting or disconnecting the ECM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the
ECM because battery voltage is applied to ECM even if
ignition switch is turned off.

SEF289H

I When connecting ECM harness connector, fasten it

securely with a lever as far as it will go as shown at left.

SEF908W

I When connecting or disconnecting pin connectors into or

from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.

SEF291H

I Before replacing ECM, perform “ECM Terminals and Ref-

erence Value” inspection and make sure ECM functions
properly. Refer to EC-553.

MEF040D

I After performing each TROUBLE DIAGNOSIS, perform

“DTC Confirmation Procedure” or “Overall Function
Check”.
The DTC should not be displayed in the “DTC Confirma-
tion Procedure” if the repair is completed. The “Overall
Function Check” should be a good result if the repair is
completed.

SAT652J

EC-458
 PRECAUTIONS WITHOUT EURO-OBD
Precautions (Cont’d)
I When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and GI
damage the ECM power transistor.

MA

EM

LC

FE

CL

SEF348N
MT
I Regarding model A33, “-B1” indicates the right bank and
“-B2” indicates the left bank as shown in the figure. AT

AX

SU

BR
SEF099W

Wiring Diagrams and Trouble Diagnosis NFEC0006 ST

When you read Wiring diagrams, refer to the following:
I GI-11, “HOW TO READ WIRING DIAGRAMS”
I EL-9, “POWER SUPPLY ROUTING” for power distribution circuit RS
When you perform trouble diagnosis, refer to the following:
I GI-32, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES” BT
I GI-21, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”

HA

SC

EL

IDX

EC-459
 PREPARATION WITHOUT EURO-OBD
Special Service Tools

Special Service Tools NFEC0007

Tool number
Description
Tool name

KV10117100 Loosening or tightening front and rear heated oxy-

Front heated oxygen gen sensors with 22 mm (0.87 in) hexagon nut
sensor wrench
Rear heated oxygen
sensor wrench

NT379

KV10117600 Checking fuel pressure with pressure gauge

Fuel pressure check
adapter

NT777

Commercial Service Tools NFEC0008

Tool name Description

Fuel filler cap adapter Checking fuel tank vacuum relief valve opening
pressure

NT653

Socket wrench Removing and installing engine coolant tempera-

ture sensor

NT705

Oxygen sensor thread Reconditioning the exhaust system threads before

cleaner installing a new oxygen sensor. Use with anti-seize
lubricant shown below.
a: 18 mm dia. with pitch 1.5 mm for Zirconia
Oxygen Sensor
b: 12 mm dia. with pitch 1.25 mm for Titania
Oxygen Sensor

NT778

EC-460
 PREPARATION WITHOUT EURO-OBD
Commercial Service Tools (Cont’d)

Tool name Description

Anti-seize lubricant Lubricating oxygen sensor thread cleaning tool GI

(PermatexTM 133AR or when reconditioning exhaust system threads.
equivalent meeting MIL
specification MIL-A-907) MA

EM
NT779
LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-461
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
Engine Control Component Parts Location

Engine Control Component Parts Location NFEC0009

MODELS WITH THREE WAY CATALYST NFEC0009S01

SEC126C

EC-462
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
Engine Control Component Parts Location (Cont’d)
MODELS WITHOUT THREE WAY CATALYST NFEC0009S02

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SEC127C

EC-463
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
Engine Control Component Parts Location (Cont’d)

SEF981X

EC-464
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
Engine Control Component Parts Location (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX
SEC128C

EC-465
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
Engine Control Component Parts Location (Cont’d)

SEF982X

EC-466
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
Circuit Diagram

Circuit Diagram NFEC0010

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC838D

EC-467
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
System Diagram

System Diagram NFEC0011

MODELS WITH THREE WAY CATALYST NFEC0011S03

SEC129C

EC-468
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
System Diagram (Cont’d)
VQ20DE ENGINE MODELS WITHOUT THREE WAY CATALYST NFEC0011S04

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SEF984XA

EC-469
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
System Diagram (Cont’d)
VQ30DE ENGINE MODELS WITHOUT THREE WAY CATALYST NFEC0011S05

SEC131C

EC-470
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
Vacuum Hose Drawing

Vacuum Hose Drawing NFEC0012

EXCEPT VQ30DE ENGINE MODELS WITHOUT THREE WAY CATALYST NFEC0012S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL
SEC132C
IDX
Refer to “System Diagram”, EC-468, 469 for Vacuum Control System.

EC-471
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
Vacuum Hose Drawing (Cont’d)
VQ30DE ENGINE MODELS WITHOUT THREE WAY CATALYST NFEC0012S02

SEC133C

Refer to “System Diagram”, EC-470 for Vacuum Control System.

EC-472
 ENGINE AND EMISSION CONTROL OVERALL
SYSTEM WITHOUT EURO-OBD
System Chart

System Chart NFEC0013

Input (Sensor) ECM Function Output (Actuator) GI

I Camshaft position sensor (PHASE) Fuel injection & mixture ratio control Injectors
I Crankshaft position sensor (REF)
I Mass air flow sensor Electronic ignition system Power transistor MA
I Engine coolant temperature sensor Idle air control system IACV-AAC valve
I Heated oxygen sensor 1 (front)*5
I Ignition switch Fuel pump control Fuel pump relay EM
I Throttle position sensor
I Closed throttle position switch *3 On board diagnostic system MIL (On the instrument panel)
I Park/neutral position (PNP) switch
EGR control*6 EGR volume control valve LC
I Air conditioner switch
I Knock sensor Swirl control valve control solenoid
I EGR temperature sensor *1 Swirl control valve control*4
valve
I Intake air temperature sensor
I Absolute pressure sensor Power valve control VIAS control solenoid valve
I Battery voltage
I Power steering oil pressure switch
Heated oxygen sensor 1 heater (front) con- Heated oxygen sensor 1 heater FE
trol*5 (front)
I Vehicle speed sensor
I Fuel tank temperature sensor *1 Heated oxygen sensor 2 heater (rear) con- Heated oxygen sensor 2 heater
I Crankshaft position sensor (POS) trol*5 (rear)
CL
I Heated oxygen sensor 2 (rear)*2
I TCM (Transmission control module) EVAP canister purge flow control
EVAP canister purge volume con-
I Refrigerant pressure sensor trol solenoid valve MT
I Electrical load
Air conditioning cut control Air conditioner relay

Cooling fan control Cooling fan relays AT

*1: These sensors are not used to control the engine system.
*2: This sensor is not used to control the engine system under normal conditions. AX
*3: This switch will operate in place of the throttle position sensor if the sensor malfunctions.
*4: Except VQ30DE engine models without three way catalyst
*5: Models with three way catalyst SU
*6: Models with three way catalyst for Latin America and VQ20 engine models for South Africa

BR

ST

RS

BT

HA

SC

EL

IDX

EC-473
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Multiport Fuel Injection (MFI) System

Multiport Fuel Injection (MFI) System

DESCRIPTION NFEC0014
Input/Output Signal Chart NFEC0014S01

ECM func-
Sensor Input Signal to ECM Actuator
tion

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

Camshaft position sensor (PHASE) Piston position

Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperature

Heated oxygen sensor 1 (front)*1 Density of oxygen in exhaust gas

Throttle position
Throttle position sensor
Throttle valve idle position
Fuel injec-
Park/neutral position (PNP) switch Gear position tion & mix-
Injectors
ture ratio
Vehicle speed sensor Vehicle speed control
Ignition switch Start signal

Air conditioner switch Air conditioner operation

Knock sensor Engine knocking condition

Battery Battery voltage

Absolute pressure sensor Ambient air barometric pressure

Power steering oil pressure switch Power steering operation

Heated oxygen sensor 2 (rear)*1, *2 Density of oxygen in exhaust gas

*1: Models with three way catalyst

*2: Under normal conditions, this sensor is not for engine control operation.

Basic Multiport Fuel Injection System NFEC0014S02

The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air
flow sensor.
Various Fuel Injection Increase/Decrease Compensation NFEC0014S03
In addition, the amount of fuel injected is compensated to improve engine performance under various oper-
ating conditions as listed below.
<Fuel increase>
I During warm-up
I When starting the engine
I During acceleration
I Hot-engine operation
I When selector lever is changed from “N” to “D”
I High-load, high-speed operation
<Fuel decrease>
I During deceleration
I During high engine speed operation

EC-474
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Multiport Fuel Injection (MFI) System (Cont’d)
Mixture Ratio Feedback Control (Closed loop control) (Models with three way catalyst)NFEC0014S04

GI

MA

EM

LC
SEF336WA

The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission con-
trol. The three way catalyst (manifold) can then better reduce CO, HC and NOx emissions. This system uses
a heated oxygen sensor 1 (front) in the exhaust manifold to monitor if the engine operation is rich or lean. The
ECM adjusts the injection pulse width according to the sensor voltage signal. For more information about the FE
heated oxygen sensor 1 (front), refer to EC-595. This maintains the mixture ratio within the range of stoichio-
metric (ideal air-fuel mixture).
This stage is referred to as the closed loop control condition. CL
Heated oxygen sensor 2 (rear) is located downstream of the three way catalyst (manifold). Even if the switch-
ing characteristics of the heated oxygen sensor 1 (front) shift, the air-fuel ratio is controlled to stoichiometric
by the signal from the heated oxygen sensor 2 (rear). MT
Open Loop Control (Models with three way catalyst) NFEC0014S05
The open loop system condition refers to when the ECM detects any of the following conditions. Feedback AT
control stops in order to maintain stabilized fuel combustion.
I Deceleration and acceleration
I High-load, high-speed operation AX
I Malfunction of heated oxygen sensor 1 (front) or its circuit
I Insufficient activation of heated oxygen sensor 1 (front) at low engine coolant temperature SU
I High engine coolant temperature
I During warm-up
I After shifting from “N” to “D” BR
I When starting the engine
Mixture Ratio Self-learning Control (Models with three way catalyst) NFEC0014S06
ST
The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the heated oxy-
gen sensor 1 (front). This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio
as close to the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily con- RS
trolled as originally designed. Both manufacturing differences (i.e., mass air flow sensor hot film) and charac-
teristic changes during operation (i.e., injector clogging) directly affect mixture ratio.
Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This BT
is then computed in terms of “injection pulse duration” to automatically compensate for the difference between
the two ratios.
“Fuel trim” refers to the feedback compensation value compared against the basic injection duration. Fuel trim
HA
includes short term fuel trim and long term fuel trim.
“Short term fuel trim” is the short-term fuel compensation used to maintain the mixture ratio at its theoretical SC
value. The signal from the heated oxygen sensor 1 (front) indicates whether the mixture ratio is RICH or LEAN
compared to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is
rich, and an increase in fuel volume if it is lean. EL
“Long term fuel trim” is overall fuel compensation carried out long-term to compensate for continual deviation
of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences,
wear over time and changes in the usage environment. IDX

EC-475
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Multiport Fuel Injection (MFI) System (Cont’d)
Fuel Injection Timing NFEC0014S07

SEF179U

Two types of systems are used.

Sequential Multiport Fuel Injection System NFEC0014S0701
Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.
Simultaneous Multiport Fuel Injection System NFEC0014S0702
Fuel is injected simultaneously into all six cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The six injectors will then receive the signals two times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
Fuel Shut-off NFEC0014S08
Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.
Electronic Ignition (EI) System
DESCRIPTION NFEC0015
Input/Output Signal Chart NFEC0015S01

ECM func-
Sensor Input Signal to ECM Actuator
tion

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

Camshaft position sensor (PHASE) Piston position

Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperature

Ignition
Throttle position
Throttle position sensor timing con- Power transistor
Throttle valve idle position
trol
Vehicle speed sensor Vehicle speed

Ignition switch Start signal

Knock sensor Engine knocking

Park/neutral position (PNP) switch Gear position

Battery Battery voltage

EC-476
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Electronic Ignition (EI) System (Cont’d)
System Description NFEC0015S02

GI

MA

EM

LC
SEF742M

The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of
the engine. The ignition timing data is stored in the ECM. This data forms the map shown.
The ECM receives information such as the injection pulse width and camshaft position sensor signal. Com- FE
puting this information, ignition signals are transmitted to the power transistor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
A °BTDC CL
During the following conditions, the ignition timing is revised by the ECM according to the other data stored
in the ECM.
I At starting MT
I During warm-up
I At idle
I At low battery voltage AT
I During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed AX
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition. SU
Air Conditioning Cut Control
DESCRIPTION NFEC0016
BR
Input/Output Signal Chart NFEC0016S01

Sensor Input Signal to ECM ECM function Actuator ST

Air conditioner switch Air conditioner “ON” signal

Throttle position sensor Throttle valve opening angle

RS
Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

BT
Air conditioner
Engine coolant temperature sensor Engine coolant temperature Air conditioner relay
cut control
HA
Ignition switch Start signal

Vehicle speed sensor Vehicle speed

SC
Refrigerant pressure sensor Refrigerant pressure

Power steering oil pressure switch Power steering operation

EL
System Description NFEC0016S02
This system improves engine operation when the air conditioner is used. IDX
Under the following conditions, the air conditioner is turned off.
I When the accelerator pedal is fully depressed.
I When cranking the engine.
I At high engine speeds.

EC-477
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Air Conditioning Cut Control (Cont’d)
I When the engine coolant temperature becomes excessively high.
I When operating power steering during low engine speed or low vehicle speed.
I When engine speed is excessively low.
I When refrigerant pressure is excessively low or high.
Fuel Cut Control (at no load & high engine
speed)
DESCRIPTION NFEC0017
Input/Output Signal Chart NFEC0017S01

ECM func-
Sensor Input Signal to ECM Actuator
tion

Vehicle speed sensor Vehicle speed

Park/neutral position (PNP) switch Neutral position

Throttle position sensor Throttle position Fuel cut

Injectors
Engine coolant temperature sensor Engine coolant temperature control

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

If the engine speed is above 1,800 rpm with no load (for example, in neutral and engine speed over 1,800
rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed.
Fuel cut will operate until the engine speed reaches 1,500 rpm, then fuel cut is cancelled.
NOTE:
This function is different from deceleration control listed under “Multiport Fuel Injection (MFI) System”, EC-474.
Evaporative Emission System
DESCRIPTION NFEC0018

SEF988X

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel
system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.
The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the
vapor is stored there when the engine is not operating or when refueling to the fuel tank.
The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the
engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine

EC-478
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Evaporative Emission System (Cont’d)
operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is propor-
tionally regulated as the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and GI
idling.

MA

EM

LC
INSPECTION NFEC0019
EVAP Canister NFEC0019S01
Check EVAP canister as follows:
1. Block port B. Blow air through port A orally. Check that air flows
freely through port C with check valve resistance. FE
2. Block port A. Blow air through port B orally. Check that air flows
freely through port C.
CL

SEF917W
MT
Fuel Tank Vacuum Relief Valve (Built into fuel fillerNFEC0019S03
cap)
1. Wipe clean valve housing. AT
2. Check valve opening pressure and vacuum.
Pressure:
AX
15.3 - 20.0 kPa (0.1530 - 0.2001 bar, 0.156 - 0.204
kg/cm2, 2.22 - 2.90 psi)
Vacuum: SU
−6.0 to −3.4 kPa (–0.0598 to –0.0343 bar, −0.061 to
−0.035 kg/cm2, −0.87 to −0.50 psi)
3. If out of specification, replace fuel filler cap as an assembly. BR
SEF989X
CAUTION:
Use only a genuine fuel filler cap as a replacement. ST

RS

BT

HA
SEF943S

Evaporative Emission (EVAP) Canister Purge Volume SC

Control Solenoid Valve NFEC0019S05
Refer to EC-718.
EL
Fuel Tank Temperature Sensor NFEC0019S06
Refer to EC-703.
IDX

EC-479
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Evaporative Emission System (Cont’d)
EVAPORATIVE EMISSION LINE DRAWING NFEC0020
Except VQ30DE Engine Models without Three Way Catalyst NFEC0020S01

SEC134C

EC-480
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Evaporative Emission System (Cont’d)
VQ30DE Engine Models without Three Way Catalyst NFEC0020S02

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SEC135C

EC-481
 ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Positive Crankcase Ventilation

Positive Crankcase Ventilation

DESCRIPTION NFEC0021
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to con-
duct crankcase blow-by gas to the intake manifold.
During partial throttle operation of the engine, the intake manifold
sucks the blow-by gas through the PCV valve.
Normally, the capacity of the valve is sufficient to handle any
blow-by and a small amount of ventilating air.
The ventilating air is then drawn from the air inlet tubes into the
SEF372Q crankcase. In this process the air passes through the hose con-
necting air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to
draw the blow-by flow through the valve. The flow goes through the
hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all
conditions.

SEF559A

INSPECTION NFEC0022
PCV (Positive Crankcase Ventilation) Valve NFEC0022S01
With engine running at idle, remove PCV valve ventilation hose
from PCV valve; if the valve is working properly, a hissing noise will
be heard as air passes through it and a strong vacuum should be
felt immediately when a finger is placed over valve inlet.

SEC137A

PCV Valve Ventilation Hose NFEC0022S02

1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any
hose cannot be freed of obstructions, replace.

ET277

EC-482
 BASIC SERVICE PROCEDURE WITHOUT EURO-OBD
Fuel Pressure Release

Fuel Pressure Release NFEC0023

Before disconnecting fuel line, release fuel pressure from fuel
line to eliminate danger. GI
WITH CONSULT-II NFEC0023S01
1. Turn ignition switch “ON”. MA
2. Perform “FUEL PRESSURE RELEASE” in “WORK SUP-
PORT” mode with CONSULT-II.
3. Start engine.
EM
4. After engine stalls, crank it two or three times to release all fuel
SEF289XA pressure. LC
5. Turn ignition switch “OFF”.

FE

CL

SEF036Y
MT

AT

AX

SU

BR
PEF823K

WITHOUT CONSULT-II
1. Remove fuel pump fuse located in fuse box.
NFEC0023S02 ST
2. Start engine.
3. After engine stalls, crank it two or three times to release all fuel RS
pressure.
4. Turn ignition switch “OFF”.
5. Reinstall fuel pump fuse after servicing fuel system. BT

HA
SEF290XA

SC

EL

IDX

SEF037Y

EC-483
 BASIC SERVICE PROCEDURE WITHOUT EURO-OBD
Fuel Pressure Check

Fuel Pressure Check NFEC0024

I When reconnecting fuel line, always use new clamps.
I Make sure that clamp screw does not contact adjacent
parts.
I Use a torque driver to tighten clamps.
I Use Pressure Gauge to check fuel pressure.
I Do not perform fuel pressure check with system operat-
ing. Fuel pressure gauge may indicate false readings.
1. Release fuel pressure to zero.
SEF030Y
2. Disconnect fuel tube joint between fuel pressure regulator and
injector tube and set fuel pressure check adapter (J44321).

3. Install pressure gauge to the fuel pressure check adapter as

shown in the figure.
4. Start engine and check for fuel leakage.
5. Read the indication of fuel pressure gauge.
At idling:
With vacuum hose connected
Approximately 235 kPa (2.35 bar, 2.4 kg/cm2, 34
psi)
With vacuum hose disconnected
Approximately 294 kPa (2.94 bar, 3.0 kg/cm2, 43
SEF031Y
psi)
If results are unsatisfactory, perform Fuel Pressure Regulator
Check.

Fuel Pressure Regulator Check NFEC0025

1. Stop engine and disconnect fuel pressure regulator vacuum
hose from vacuum gallery.
2. Plug vacuum gallery with a blind cap.
3. Connect variable vacuum source to fuel pressure regulator.

SEC015C

EC-484
 BASIC SERVICE PROCEDURE WITHOUT EURO-OBD
Fuel Pressure Regulator Check (Cont’d)
4. Start engine and read indication of fuel pressure gauge as
vacuum is changed.
Fuel pressure should decrease as vacuum increases. If results GI
are unsatisfactory, replace fuel pressure regulator.

MA

EM

SEF718BA LC
Injector
REMOVAL AND INSTALLATION NFEC0026
1. Release fuel pressure to zero.
2. Remove intake manifold collector. Refer to EM-20, “TIMING
CHAIN”. FE
3. Remove fuel tube assemblies in numerical sequence as
shown in the figure at left.
CL
4. Expand and remove clips securing fuel injectors.
5. Extract fuel injectors straight from fuel tubes.
SEF702X I Be careful not to damage injector nozzles during removal. MT
I Do not bump or drop fuel injectors.
I Do not disassemble or adjust fuel injectors.
AT
6. Carefully install O-rings, including the one used with the pres-
sure regulator.
I Lubricate O-rings with a smear of engine oil. AX
I Be careful not to damage O-rings with service tools, fin-
ger nails or clips. Do not expand or twist O-rings. If
stretched, do not insert them into fuel tubes immediately SU
after stretching.
I Discard old clips; replace with new ones.
7. Position clips in grooves on fuel injectors.
BR
SEF703X
I Make sure that protrusions of fuel injectors are aligned
with cutouts of clips after installation. ST

RS

BT

HA

SC

EL

IDX

EC-485
 BASIC SERVICE PROCEDURE WITHOUT EURO-OBD
Injector (Cont’d)

SEF704X

8. Align protrusions of fuel tubes with those of fuel injectors.

Insert fuel injectors straight into fuel tubes.
9. After properly inserting fuel injectors, check to make sure that
fuel tube protrusions are engaged with those of fuel injectors,
and that flanges of fuel tubes are engaged with clips.

10. Tighten fuel tube assembly mounting nuts in numerical

sequence (indicated in the figure at left) and in two stages.
: Tightening torque N·m (kg-m, ft-lb)
1st stage:
9.3 - 10.8 (1.0 - 1.1, 6.9 - 7.9)
2nd stage:
20.6 - 26.5 (2.1 - 2.7, 16 - 19)
11. Install all parts removed in reverse order of removal.
CAUTION:
After properly connecting fuel tube assembly to injector and
SEF705X
fuel hose, check connection for fuel leakage.
How to Check Idle Speed and Ignition Timing NFEC0607
IDLE SPEED NFEC0607S01
I Using CONSULT-II
Check idle speed in “DATA MONITOR” mode with CONSULT-II.

SEF058Y

EC-486
BASIC SERVICE PROCEDURE WITHOUT EURO-OBD
How to Check Idle Speed and Ignition Timing (Cont’d)
IGNITION TIMING NFEC0607S02
Any of following two methods may be used.
I Method A GI
a) Attach timing light to loop wire as shown.
b) Check ignition timing. MA

EM

SEF260P LC
I Method B
a) Remove No. 1 ignition coil.

FE

CL

SEF247Q
MT
b) Connect No. 1 ignition coil and No. 1 spark plug with suitable
high-tension wire as shown, and attach timing light clamp to AT
this wire.
c) Check ignition timing.
AX

SU

BR
SEF248Q

ST

RS

BT

HA
SEF257P

SC

EL

IDX

EC-487
 BASIC SERVICE PROCEDURE WITHOUT EURO-OBD
How to Check Idle Speed and Ignition Timing (Cont’d)

SEF311Q

Idle Air Volume Learning NFEC0642

DESCRIPTION NFEC0642S01
“Idle Air Volume Learning” is an operation to learn the idle air vol-
ume that keeps each engine within the specific range. It must be
performed under any of the following conditions:
I Each time IACV-AAC valve, throttle body or ECM is replaced.
I Idle speed or ignition timing is out of specification.
PRE-CONDITIONING NFEC0642S02
Before performing “Idle Air Volume Learning”, make sure that all of
SEF452Y the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are
missed for even a moment.
I Battery voltage: More than 12.9V (At idle)
I Engine coolant temperature: 70 - 99°C (158 - 210°F)
I PNP switch: ON
I Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
I Cooling fan motor: Not operating
I Steering wheel: Neutral (Straight-ahead position)
I Vehicle speed: Stopped
SEF454Y I Transmission: Warmed-up
For A/T models with CONSULT-II, drive vehicle until “FLUID
TEMP SE” in “DATA MONITOR” mode of “A/T” system indi-
cates less than 0.9V.
For A/T models without CONSULT-II and M/T models, drive
vehicle for 10 minutes.
OPERATION PROCEDURE NFEC0642S03
With CONSULT-II NFEC0642S0301
1. Turn ignition switch “ON” and wait at least 1 second.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and warm it up to normal operating temperature.
SEF455Y

EC-488
BASIC SERVICE PROCEDURE WITHOUT EURO-OBD
Idle Air Volume Learning (Cont’d)
4. Check that all items listed under the topic “PRE-CONDITION-
ING” (previously mentioned) are in good order.
5. Turn ignition switch “OFF” and wait at least 10 seconds. GI
6. Start the engine and let it idle for at least 30 seconds.
7. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
MA
8. Touch “START” and wait 20 seconds.
9. Make sure that “CMPLT” is displayed on CONSULT-II screen.
If “INCMP” is displayed, “Idle Air Volume Learning” will not be EM
carried out successfully. In this case, find the cause of the
problem by referring to the NOTE below.
10. Rev up the engine two or three times. Make sure that idle LC
speed and ignition timing are within specifications.
ITEM SPECIFICATION

Idle speed VQ20DE M/T: 675±50 rpm

A/T: 700±50 rpm (in “P” or “N” position)
FE
VQ30DE M/T: 625±50 rpm
A/T: 700±50 rpm (in “P” or “N” position)

Ignition timing VQ20DE M/T: 9°±5° BTDC CL

A/T: 9°±5° BTDC (in “P” or “N” position)

VQ30DE M/T: 15°±5° BTDC MT

A/T: 15°±5° BTDC (in “P” or “N” position)

AT

AX

SU

BR

Without CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
NFEC0642S0302 ST
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and warm it up to normal operating temperature. RS
4. Check that all items listed under the topic “PRE-CONDITION-
ING” (previously mentioned) are in good order.
5. Turn ignition switch “OFF” and wait at least 10 seconds. BT
6. Start the engine and let it idle for at least 30 seconds.
7. Disconnect throttle position sensor harness connector (brown), HA
then reconnect it within 5 seconds.
SEF260X
8. Wait 20 seconds.
9. Make sure that idle speed is within specifications. If not, the SC
result will be incomplete. In this case, find the cause of the
problem by referring to the NOTE below.
10. Rev up the engine two or three times. Make sure that idle EL
speed and ignition timing are within specifications.
IDX

EC-489
 BASIC SERVICE PROCEDURE WITHOUT EURO-OBD
Idle Air Volume Learning (Cont’d)

ITEM SPECIFICATION

Idle speed VQ20DE M/T: 675±50 rpm

A/T: 700±50 rpm (in “P” or “N” position)

VQ30DE M/T: 625±50 rpm

A/T: 700±50 rpm (in “P” or “N” position)

Ignition timing VQ20DE M/T: 9°±5° BTDC

A/T: 9°±5° BTDC (in “P” or “N” position)

VQ30DE M/T: 15°±5° BTDC

A/T: 15°±5° BTDC (in “P” or “N” position)

NOTE:
If idle air volume learning cannot be performed successfully,
proceed as follows:
1) Check that throttle valve is fully closed.
2) Check PCV valve operation.
3) Check that downstream of throttle valve is free from air
leakage.
4) Adjust closed throttle position switch and reset memory.
(Refer to Basic Inspection, EC-514.)
5) When the above four items check out OK, engine compo-
nent parts and their installation condition are question-
able. Check and eliminate the cause of the problem.
It is useful to perform “TROUBLE DIAGNOSIS — SPECIFI-
CATION VALUE”, EC-562.
6) If any of the following conditions occur after the engine
has started, eliminate the cause of the problem and per-
form “Idle air volume learning” all over again:
I Engine stalls.
I Erroneous idle.
I Blown fuses related to the IACV-AAC valve system.

EC-490
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Introduction

Introduction NFEC0029
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including: GI
Diagnostic Trouble Code (DTC)

Freeze Frame data

MA
1st Trip Diagnostic Trouble Code (1st Trip DTC)
EM
1st Trip Freeze Frame data

The above information can be checked using procedures listed in the table below. LC
X: Applicable —: Not applicable

1st trip Freeze Frame

DTC 1st trip DTC Freeze Frame data
data

CONSULT-II X X X X

ECM*1 X X*2 — — FE
*1: In diagnostic test mode II (Self-diagnostic results), (1st trip) DTC is displayed on the MIL by a set of four digit numbers.
*2: When the DTC and the 1st trip DTC appear on the display simultaneously, it is difficult to clearly distinguish one from the other. CL
Two Trip Detection Logic NFEC0030
When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in MT
the ECM memory. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored
in the ECM memory. <2nd trip> The “trip” in the “Two Trip Detection Logic” means a driving mode in which AT
self-diagnosis is performed during vehicle operation. When the ECM enters the fail-safe mode (Refer to
EC-543), the DTC is stored in the ECM memory even in the 1st trip.
AX
Emission-related Diagnostic Information NFEC0031
DTC AND 1ST TRIP DTC NFEC0031S01
The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic SU
result obtained. If the ECM memory was cleared previously, and the 1st trip DTC did not reoccur, the 1st trip
DTC will not be displayed.
If a malfunction is detected during the 1st trip, the 1st trip DTC is stored in the ECM memory. If the same mal- BR
function is not detected in the 2nd trip (meeting the required driving pattern), the 1st trip DTC is cleared from
the ECM memory. If the same malfunction is detected in the 2nd trip, both the 1st trip DTC and DTC are stored
in the ECM memory. In other words, the DTC is stored in the ECM memory when the same malfunction occurs ST
in two consecutive trips. If a 1st trip DTC is stored and a non-diagnostic operation is performed between the
1st and 2nd trips, only the 1st trip DTC will continue to be stored. For fail-safe items, the DTC is stored in the
ECM memory even in the 1st trip. RS
Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in “HOW TO
ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-492.
When a (1st trip) DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame
BT
data as specified in “Work Flow” procedure Step II, refer to EC-512. Then perform “DTC Confirmation Proce-
dure” or “Overall Function Check” to try to duplicate the problem. If the malfunction is duplicated, the item
requires repair.
HA
How to Read DTC and 1st Trip DTC
DTC and 1st trip DTC can be read by the following methods.
NFEC0031S0101
SC
Without CONSULT-II
ECM displays the DTC by a set of four digit numbers with MIL illumination in the diagnostic test mode II (Self-
diagnostic results). Example: 0100, 0115, 0340, 1335, etc. EL
With CONSULT-II
CONSULT-II displays the DTC in “SELF-DIAG RESULTS” mode. Examples: P0100, P0115, P0340, P1335,
etc.
IDX
(CONSULT-II also displays the malfunctioning component or system.)
I 1st trip DTC No. is the same as DTC No.
I Output of a DTC indicates a malfunction. However, ECM in the diagnostic test mode II (Self-diag-
nostic results) does not indicate whether the malfunction is still occurring or has occurred in the

EC-491
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Emission-related Diagnostic Information (Cont’d)
past and has returned to normal. CONSULT-II can identify malfunction status as shown below.
Therefore, the use of CONSULT-II (if available) is recommended.
A sample CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a malfunc-
tion is displayed in the SELF-DIAGNOSTIC RESULTS mode of CONSULT-II. Time data indicates how many
times the vehicle was driven after the last detection of a DTC.
If the DTC is being detected currently, the time data will be “0”.
If a 1st trip DTC is stored in the ECM, the time data will be “[1t]”.

SEF992X

FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA NFEC0031S02
The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant
temperature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, throttle valve opening, base
fuel schedule and intake air temperature at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II. For
details, see EC-502.
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no prior-
ity for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data is stored in the ECM memory, 1st trip freeze frame data is no longer stored. Remember,
only one set of freeze frame data can be stored in the ECM.
If freeze frame data is stored in the ECM memory and another freeze frame data occurs later, the first (origi-
nal) freeze frame data remains unchanged in the ECM memory.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM
memory is erased. Procedures for clearing the ECM memory are described in “HOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATION”, EC-492.
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION NFEC0031S06
How to Erase DTC ( With CONSULT-II) NFEC0031S0601
1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least
10 seconds and then turn it “ON” (engine stopped) again.
2. Touch “ENGINE”.
3. Touch “SELF-DIAG RESULTS”.
4. Touch “ERASE”. (The DTC in the ECM will be erased.)

EC-492
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Emission-related Diagnostic Information (Cont’d)

GI

MA

EM

LC

FE

SEC074C CL
The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II. MT
How to Erase DTC ( Without CONSULT-II) NFEC0031S0602
1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least AT
10 seconds and then turn it “ON” (engine stopped) again.
2. Change the diagnostic test mode from Mode II to Mode I by using the data link connector. (See EC-496.)
The emission related diagnostic information in the ECM can be erased by changing the diagnostic test mode. AX
I If the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
SU
I Erasing the emission-related diagnostic information using CONSULT-II is easier and quicker than
switching the diagnostic test mode using the data link connector.
I The following data are cleared when the ECM memory is erased. BR
1) Diagnostic trouble codes
2) 1st trip diagnostic trouble codes
3) Freeze frame data
ST
4) 1st trip freeze frame data
5) Others RS
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but
all of the data listed above, are cleared from the ECM memory during work procedures.
BT
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM — NATS) NFEC0031S08

HA

SC

EL

IDX
SEF515Y

I If the security indicator lights up with the ignition switch in the “ON” position or “NATS MALFUNC-
TION” is displayed on “SELF-DIAG RESULTS” screen, perform self-diagnostic results mode with

EC-493
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Emission-related Diagnostic Information (Cont’d)
CONSULT-II using NATS program card. Refer to “NVIS (Nissan Vehicle Immobilizer System —
NATS)” in EL section.
I Confirm no self-diagnostic results of NVIS (NATS) is displayed before touching “ERASE” in “SELF-
DIAG RESULTS” mode with CONSULT-II.
I When replacing ECM, initialization of NVIS (NATS) system and registration of all NVIS (NATS) igni-
tion key IDs must be carried out with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of NVIS (NATS)
initialization and NVIS (NATS) ignition key ID registration, refer to CONSULT-II operation manual,
IVIS/NVIS.
Malfunction Indicator Lamp (MIL)
DESCRIPTION NFEC0032

SAT652J

The MIL is located on the instrument panel.

1. The MIL will light up when the ignition switch is turned ON without the engine running. This is a bulb check.
I If the MIL does not light up, refer to EL-164, WARNING LAMPS or see EC-819.
2. When the engine is started, the MIL should go off.
If the MIL remains on, the ECM’s CPU is malfunctioning.

EC-494
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Malfunction Indicator Lamp (MIL) (Cont’d)
On Board Diagnostic System Function =NFEC0032S01
The on board diagnostic system has the following four functions.
GI
Diagnostic Test KEY and ENG. Function Explanation of Function
Mode Status

Mode I Ignition switch in BULB CHECK This function checks the MIL bulb for damage (blown, MA
ON position open circuit, etc.).
If the MIL does not come on, check MIL circuit. (See
EC-819.) EM
Engine stopped
LC

Engine running MALFUNCTION This is a usual driving condition. When the ECM’s CPU is
WARNING malfunctioning, the MIL will light up to inform the driver
that a malfunction has been detected.

FE
Mode II Ignition switch in SELF-DIAGNOSTIC RESULTS This function allows DTCs and 1st trip DTCs to be read.
ON position
CL
Engine stopped
MT

Engine running HEATED OXYGEN SENSOR 1 This function allows the fuel mixture condition (lean or AT
MONITOR (FRONT)*1 rich), monitored by heated oxygen sensor 1 (front), to be
read.
AX
*1: Models with three way catalyst
MIL Flashing without DTC NFEC0032S0102 SU
If the ECM is in Diagnostic Test Mode II, MIL may flash when engine is running. In this case, check ECM
diagnostic test mode following “How to Switch Diagnostic Test Modes”, EC-496.
How to switch the diagnostic test (function) modes, and details of the above functions are described later. BR
(Refer to EC-497.)
The following emission-related diagnostic information is cleared when the ECM memory is erased.
1) Diagnostic trouble codes ST
2) 1st trip diagnostic trouble codes
3) Freeze frame data
RS
4) 1st trip freeze frame data
5) Others
BT

HA

SC

EL

IDX

EC-495
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Malfunction Indicator Lamp (MIL) (Cont’d)
How to Switch Diagnostic Test Modes NFEC0032S07

SEF994XC

*1 EC-819 *3 EC-819 *4 EC-543

*2 EC-494

EC-496
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Malfunction Indicator Lamp (MIL) (Cont’d)
Diagnostic Test Mode I — Bulb Check NFEC0032S03
In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to
EL-164, “WARNING LAMPS” or see EC-819. GI
Diagnostic Test Mode I — Malfunction Warning NFEC0032S04

MIL Condition
MA
ON When the ECM’s CPU is malfunctioning.
EM
OFF No malfunction.

Diagnostic Test Mode II — Self-diagnostic Results NFEC0032S08 LC

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MIL.
A DTC will be used as an example for how to read a code.

FE

CL

MT

AT

AX

SU
SEF952W
BR
A particular DTC can be identified by the number of four-digit numeral flashes. The “zero” is indicated by the
number of ten flashes. The length of time the 1000th-digit numeral flashes on and off is 1.2 seconds consist-
ing of an ON (0.6-second)-OFF (0.6-second) cycle. ST
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0 second OFF. In other words, the lat-
ter numeral appears on the display 1.3 seconds after the former numeral has disappeared. RS
A change from one DTC to another occurs at an interval of 1.8 second off.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC “0000” refers to no
malfunction. (See TROUBLE DIAGNOSIS — INDEX, EC-454.)
BT
How to Erase Diagnostic Test Mode II (Self-diagnostic results) NFEC0032S0801
The DTC can be erased from the backup memory in the ECM when the diagnostic test mode is changed from HA
Diagnostic Test Mode II to Diagnostic Test Mode I. (Refer to “How to Switch Diagnostic Test Modes”, EC-496.)
I If the battery is disconnected, the DTC will be lost from the backup memory after approx. 24 hours.
I Be careful not to erase the stored memory before starting trouble diagnoses. SC

EL

IDX

EC-497
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
Malfunction Indicator Lamp (MIL) (Cont’d)
Diagnostic Test Mode II — Heated Oxygen Sensor 1 Monitor (Front) =NFEC0032S09
In this mode, the MIL displays the condition of the fuel mixture (lean or rich) which is monitored by the heated
oxygen sensor 1 (front)
MIL Fuel mixture condition in the exhaust gas Air fuel ratio feedback control condition

ON Lean
Closed loop system
OFF Rich

*Remains ON or OFF Any condition Open loop system

*: Maintains conditions just before switching to open loop.

To check the heated oxygen sensor 1 (front) function, start engine in the Diagnostic Test Mode II and warm
it up until engine coolant temperature indicator points to the middle of the gauge.
Next run engine at about 2,000 rpm for about 2 minutes under no-load conditions. Then make sure that the
MIL comes ON more than 5 times within 10 seconds with engine running at 2,000 rpm under no-load.
ECM will start heated oxygen sensor 1 (front) monitoring from the bank 1 sensor.
How to Switch Monitored Sensor from Bank 1 to Bank 2 or Vice Versa NFEC0032S0901
I The following procedure should be performed while the engine is running.
1. Connect CHK and IGN terminals of data link connector with a suitable harness.
2. Wait at least 2 seconds.
3. Disconnect the suitable harness between CHK and IGN terminals of data link connector.

SEF134MD

EC-498
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II

CONSULT-II =NFEC0034
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
NFEC0034S01
GI
2. Connect “CONSULT-II” to data link connector, which is located
under driver’s side dash panel. MA

EM

SEF289XA LC

FE

CL

SEF036Y
MT
3. Turn ignition switch ON.
4. Touch “START”. AT

AX

SU

BR
PBR455D

5. Touch “ENGINE”.
ST

RS

BT

HA
SEF995X

6. Perform each diagnostic test mode according to each service SC

procedure.
For further information, see the CONSULT-II Operation
Manual. EL

IDX

SEF838Z

EC-499
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)
ENGINE CONTROL COMPONENT PARTS/CONTROL
SYSTEMS APPLICATION NFEC0034S02

DIAGNOSTIC TEST MODE

SELF-DIAGNOSTIC
RESULTS DATA
Item WORK DATA ACTIVE
FREEZE MONITOR
SUPPORT MONITOR TEST
DTC FRAME (SPEC)
DATA*2

Crankshaft position sensor (POS) X X X X

Crankshaft position sensor (REF) X X X X

Mass air flow sensor X X X

Engine coolant temperature sensor X X X X X

Heated oxygen sensor 1 (front)*1 X X X

Heated oxygen sensor 2 (rear)*1 X X

ENGINE CONTROL COMPONENT PARTS

Vehicle speed sensor X X X

Throttle position sensor X X X X

Fuel tank temperature sensor X X X

Absolute pressure sensor X X

INPUT

EGR temperature sensor*3 X X

Intake air temperature sensor X X X

Knock sensor X

Ignition switch (start signal) X X

Closed throttle position switch (throttle

X X
position sensor signal)

Air conditioner switch X X

Park/neutral position (PNP) switch X X

Power steering oil pressure switch X X

Battery voltage X X

Ambient air temperature switch X X

Load signal X X

EC-500
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)

DIAGNOSTIC TEST MODE

SELF-DIAGNOSTIC GI
RESULTS DATA
Item WORK DATA ACTIVE
FREEZE MONITOR
SUPPORT MONITOR TEST
DTC FRAME (SPEC) MA
DATA*2

Injectors X X X EM
Power transistor (Ignition timing) X X X

IACV-AAC valve X X X LC
ENGINE CONTROL COMPONENT PARTS

EVAP canister purge volume control

X X X
solenoid valve

Air conditioner relay X X

Fuel pump relay X X X X FE

OUTPUT

Cooling fan X X X X

EGR volume control valve*3 X X X CL

Heated oxygen sensor 1 heater (front)*1 X X

Heated oxygen sensor 2 heater (rear)*1 X X MT

Swirl control valve control solenoid
X X X
valve*4
AT
VIAS control solenoid valve X X X

Electronic controlled engine mount X X X AX

Calculated load value X X X

X: Applicable SU
*1: Models with three way catalyst
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-492. BR
*3: Models with three way catalyst for Latin America and VQ20DE engine models for South Africa
*4: Except VQ30DE engine models without three way catalyst

FUNCTION ST
NFEC0034S03

Diagnostic test mode Function

RS
This mode enables a technician to adjust some devices faster and more accurately by following the
Work support
indications on the CONSULT-II unit.

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame BT
Self-diagnostic results
data can be read and erased quickly.*1

Data monitor Input/Output data in the ECM can be read. HA

Input/Output specifications of the basic fuel schedule, AFM, A/F feedback control value and the
Data monitor (spec)
other data monitor items can be read.
SC
Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also
Active test
shifts some parameters in a specified range.

ECM part number ECM part number can be read. EL

*1: The following emission-related diagnostic information is cleared when the ECM memory is erased.
1) Diagnostic trouble codes IDX
2) 1st trip diagnostic trouble codes
3) Freeze frame data
4) 1st trip freeze frame data
5) Others

EC-501
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)
WORK SUPPORT MODE NFEC0034S04

WORK ITEM CONDITION USAGE

TP SW/TP SEN IDLE POSI ADJ I FOLLOW THE BASIC INSPECTION IN THE SERVICE When adjusting the idle throttle
MANUAL. position.

FUEL PRESSURE RELEASE I FUEL PUMP WILL STOP BY TOUCHING “START” When releasing fuel pressure
DURING IDLING. from fuel line
CRANK A FEW TIMES AFTER ENGINE STALLS.

IDLE AIR VOL LEARN I THE IDLE AIR VOLUME THAT KEEPS THE ENGINE When learning the idle air volume
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.

SELF-LEARNING CONT I THE COEFFICIENT OF SELF-LEARNING CONTROL When releasing fuel pressure
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF- from fuel line
FICIENT.

TARGET IDLE RPM ADJ* I IDLE CONDITION When setting target idle speed

TARGET IGNITION TIMING ADJ* I IDLE CONDITION When adjusting target ignition
timing
After adjustment, confirm target
ignition timing with a timing light.

*: This function is not necessary in the usual service procedure.

SELF-DIAGNOSTIC MODE NFEC0034S05

DTC and 1st Trip DTC NFEC0034S0501
Regarding items of “DTC and 1st trip DTC”, refer to “TROUBLE
DIAGNOSIS — INDEX” (See EC-454.)
Freeze Frame Data and 1st Trip Freeze Frame Data
NFEC0034S0502

Freeze frame data

Description
item*1

DIAG TROUBLE
I The engine control component part/control system has a trouble code, it is displayed as “PXXXX”.
CODE
(Refer to “TROUBLE DIAGNOSIS — INDEX”, EC-454.)
[PXXXX]

I “Fuel injection system status” at the moment a malfunction is detected is displayed.

FUEL SYS-B1*2*3 I One mode in the following is displayed.
“MODE 2”: Open loop due to detected system malfunction
“MODE 3”: Open loop due to driving conditions (power enrichment, deceleration enrichment)
FUEL SYS-B2*2*3 “MODE 4”: Closed loop - using oxygen sensor(s) as feedback for fuel control
“MODE 5”: Open loop - has not yet satisfied condition to go to closed loop

CAL/LD VALUE [%] I The calculated load value at the moment a malfunction is detected is displayed.

COOLANT TEMP [°C]

I The engine coolant temperature at the moment a malfunction is detected is displayed.
or [°F]

S-FUEL TRIM-B1 [%]*3 I “Short-term fuel trim” at the moment a malfunction is detected is displayed.
I The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
S-FUEL TRIM-B2 [%]*3 schedule.

L-FUEL TRIM-B1 [%]*3 I “Long-term fuel trim” at the moment a malfunction is detected is displayed.
I The long-term fuel trim indicates much more gradual feedback compensation to the base fuel sched-
L-FUEL TRIM-B2 [%]*3 ule than short-term fuel trim.

ENGINE SPEED [rpm] I The engine speed at the moment a malfunction is detected is displayed.

VHCL SPEED [km/h] or

I The vehicle speed at the moment a malfunction is detected is displayed.
[mph]

ABSOL TH·P/S [%] or

I The throttle valve opening at the moment a malfunction is detected is displayed.
[degree]

B/FUEL SCHDL [msec] I The base fuel schedule at the moment a malfunction is detected is displayed.

EC-502
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)

Freeze frame data

Description
item*1
GI
INT/A TEMP SE [°C] or
I The intake air temperature at the moment a malfunction is detected is displayed.
[°F]

*1: The items are the same as those of 1st trip freeze frame data.
MA
*2: Regarding A33 model, “-B1” indicates right bank and “-B2” indicates left bank.
*3: For models with three way catalyst.
EM
DATA MONITOR MODE NFEC0034S06

ECM
Main LC
Monitored item [Unit] input Description Remarks
signals
signals

I Indicates the engine speed computed

ENG SPEED [rpm] q q from the REF signal (120° signal) of
the crankshaft position sensor (REF).
FE
I Accuracy becomes poor if engine
I Indicates the engine speed computed speed drops below the idle rpm.
CKPS·RPM (POS)
q from the POS signal (1° signal) of the I If the signal is interrupted while the
[rpm]
crankshaft position sensor (POS). engine is running, an abnormal value
CL
may be indicated.

I Indicates the number of signal plate MT

POS COUNT q (Flywheel/Drive Plate) cogs (tooth) dur-
ing one revolution of the engine.

I The signal voltage of the mass air flow I When the engine is stopped, a certain
AT
MAS A/F SE-B1 [V] q q
sensor is displayed. value is indicated.

I The engine coolant temperature (deter-

I When the engine coolant temperature AX
sensor is open or short-circuited, ECM
COOLAN TEMP/S mined by the signal voltage of the
q q enters fail-safe mode. The engine cool-
[°C] or [°F] engine coolant temperature sensor) is
displayed.
ant temperature determined by the SU
ECM is displayed.

HO2S1 (B1) [V]*1 q q I The signal voltage of the heated oxy-

gen sensor 1 (front) is displayed.
BR
HO2S1 (B2) [V]*1 q q

HO2S2 (B1) [V]*1 q q I The signal voltage of the heated oxy- ST

HO2S2 (B2) [V]*1 q q gen sensor 2 (rear) is displayed.

I Display of heated oxygen sensor 1

HO2S1 MNTR (B1)*1 (front) signal during air-fuel ratio feed-
RS
q I After turning ON the ignition switch,
[RICH/LEAN] back control:
“RICH” is displayed until air-fuel mix-
RICH ... means the mixture became
“rich”, and control is being affected
ture ratio feedback control begins. BT
I When the air-fuel ratio feedback is
toward a leaner mixture.
clamped, the value just before the
HO2S1 MNTR (B2)*1 LEAN ... means the mixture became
q clamping is displayed continuously.
[RICH/LEAN] “lean”, and control is being affected HA
toward a rich mixture.

I Display of heated oxygen sensor 2

HO2S2 MNTR (B1)*1 (rear) signal:
SC
q
[RICH/LEAN] RICH ... means the amount of oxygen
after three way catalyst (manifold) is I When the engine is stopped, a certain
relatively small. value is indicated. EL
HO2S2 MNTR (B2)*1 LEAN ... means the amount of oxygen
q after three way catalyst (manifold) is
[RICH/LEAN]
relatively large. IDX
I The vehicle speed computed from the
VHCL SPEED SE
q q vehicle speed sensor signal is dis-
[km/h] or [mph]
played.

EC-503
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)

ECM
Main
Monitored item [Unit] input Description Remarks
signals
signals

I The power supply voltage of ECM is

BATTERY VOLT [V] q q
displayed.

I The throttle position sensor signal volt-

THRTL POS SEN [V] q q
age is displayed.

I The fuel temperature judged from the

FUEL T/TMP SE
q fuel tank temperature sensor signal
[°C] or [°F]
voltage is displayed.

I The intake air temperature determined

INT/A TEMP SE
q q by the signal voltage of the intake air
[°C] or [°F]
temperature sensor is indicated.

I The signal voltage of the EGR tem-

EGR TEMP SEN [V]*3 q q
perature sensor is displayed.

START SIGNAL I Indicates [ON/OFF] condition from the I After starting the engine, [OFF] is dis-
q q
[ON/OFF] starter signal. played regardless of the starter signal.

I Indicates idle position [ON/OFF] com-

CLSD THL POS
q q puted by ECM according to the throttle
[ON/OFF]
position sensor signal.

I Indicates mechanical contact [ON/OFF]

CLSD THL/P SW
q condition of the closed throttle position
[ON/OFF]
switch.

I Indicates [ON/OFF] condition of the air

AIR COND SIG
q q conditioner switch as determined by
[ON/OFF]
the air conditioner signal.

I Indicates [ON/OFF] condition from the

P/N POSI SW
q q park/neutral position (PNP) switch sig-
[ON/OFF]
nal.

I [ON/OFF] condition of the power steer-

PW/ST SIGNAL ing oil pressure switch determined by
q q
[ON/OFF] the power steering oil pressure signal
is indicated.

AMB TEMP SW I Indicates [ON/OFF] condition from the

q
[ON/OFF] ambient air temperature switch signal.

IGNITION SW I Indicates [ON/OFF] condition from igni-

q
[ON/OFF] tion switch.

INJ PULSE-B1 [msec] q I Indicates the actual fuel injection pulse

I When the engine is stopped, a certain
width compensated by ECM according
computed value is indicated.
INJ PULSE-B2 [msec] to the input signals.

I “Base fuel schedule” indicates the fuel

injection pulse width programmed into
B/FUEL SCHDL [msec] q
ECM, prior to any learned on board
correction.

I Indicates the ignition timing computed I When the engine is stopped, a certain
IGN TIMING [BTDC] q
by ECM according to the input signals. value is indicated.

I Indicates the IACV-AAC valve control

IACV-AAC/V [step] q value computed by ECM according to
the input signals.

EC-504
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)

ECM
Main
Monitored item [Unit] input Description Remarks
signals
signals GI
I Indicates the EVAP canister purge vol-
ume control solenoid valve control MA
value computed by the ECM according
PURG VOL C/V [%] q
to the input signals.
I The opening becomes larger as the
value increases.
EM

q I When the engine is stopped, a certain

A/F ALPHA-B1 [%]*1 I The mean value of the air-fuel ratio
feedback correction factor per cycle is
value is indicated. LC
I This data also includes the data for the
A/F ALPHA-B2 [%]*1 q indicated.
air-fuel ratio learning control.

I The air conditioner relay control condi-

AIR COND RLY
q tion (determined by ECM according to
[ON/OFF]
the input signal) is indicated.
FE
I Indicates the fuel pump relay control
FUEL PUMP RLY
q condition determined by ECM accord-
[ON/OFF]
ing to the input signals. CL
I Indicates the control condition of the
cooling fan (determined by ECM
COOLING FAN according to the input signal). MT
q
[ON/OFF] HIGH ... High speed operation
LOW ... Low speed operation
OFF ... Stop AT
I Indicates the EGR volume control
value computed by the ECM according
EGR VOL CON/V*3
q to the input signals. AX
[step]
I The opening becomes larger as the
value increases.
SU
HO2S1 HTR (B1)*1 I Indicates [ON/OFF] condition of heated
[ON/OFF] oxygen sensor 1 heater (front) deter-
HO2S1 HTR (B2)*1 mined by ECM according to the input BR
[ON/OFF] signals.

HO2S2 HTR (B1)*1 I Indicates [ON/OFF] condition of heated ST

[ON/OFF] oxygen sensor 2 heater (rear) deter-
HO2S2 HTR (B2)*1 mined by ECM according to the input
[ON/OFF] signals. RS
I “Calculated load value” indicates the
CAL/LD VALUE [%] value of the current airflow divided by BT
peak airflow.

I “Absolute throttle position sensor” indi-

ABSOL TH·P/S [%] or cates the throttle opening computed by HA
[degree] ECM according to the signal voltage of
the throttle position sensor.
SC
I Indicates the mass airflow computed
MASS AIRFLOW
by ECM according to the signal voltage
[g·m/s]
of the mass airflow sensor.
EL
I The signal voltage of the absolute
ABSOL PRES/SE [V] q
pressure sensor is displayed.
IDX

EC-505
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)

ECM
Main
Monitored item [Unit] input Description Remarks
signals
signals

I The control condition of the swirl con-

trol valve control solenoid valve (deter-
SWRL CONT S/V*2 mined by ECM according to the input
[ON/OFF] signals) is indicated.
I ON ... Swirl control valve is closed.
OFF ... Swirl control valve is opened.

I Indicates [ON/OFF] condition from the

electrical load signal and/or lighting
switch.
LOAD SIGNAL
q q ON ... rear defogger is operating
[ON/OFF]
and/or lighting switch is on.
OFF ... rear defogger is not operating
and lighting switch is not on.

TRVL AFTER MIL I Distance traveled while MIL is acti-

[km] or [Mile] vated

I This item is not available. A certain

FPCM DR VOLT [V]
value is indicated.

I The control condition of the VIAS con-

trol solenoid valve (determined by
ECM according to the input signal) is
VIAS S/V indicated.
[ON/OFF] I OFF ... VIAS control solenoid valve is
not operating.
ON ... VIAS control solenoid valve is
operating.

I The control condition of the electronic

controlled engine mount (computed by
ENGINE MOUNT ECM according to the input signals) is
[IDLE/TRVL] indicated.
I IDLE ... Idle condition
I TRVL ... Driving condition

I Display the condition of idle air volume

learning
YET ... Idle air volume learning has not
been performed yet.
IDL A/V LEAN
CMPLT ... Idle air volume learning has
already been performed successfully.
INCMP ... Idle air volume learning has
not been performed successfully.

I Voltage measured by the voltage

Voltage [V]
probe.

I Only “#” is displayed if item is unable

to be measured.
Frequency I Pulse width, frequency or duty cycle I Figures with “#”s are temporary ones.
[msec] or [Hz] or [%] measured by the pulse probe. They are the same figures as an actual
piece of data which was just previously
measured.

*1: Models with three way catalyst

*2: Except VQ30DE engine models without three way catalyst
*3: Models with three way catalyst for Latin America and VQ20 engine models for Sourth Africa
NOTE:
I Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
I Regarding A33 model, “-B1” indicates right bank and “-B2” indicates left bank.

EC-506
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)
DATA MONITOR (SPEC) MODE NFEC0034S11

ECM GI
Main
Monitored item [Unit] input Description Remarks
signals
signals

I The signal voltage of the mass air flow sen- I When the engine is running, specifi- MA
MAS A/F SE-B1 [V] q q
sor specification is displayed. cation range is indicated.

I “Base fuel schedule” indicates the fuel injec- EM

B/FUEL SCHDL I When the engine is running, specifi-
tion pulse width programmed into ECM,
[msec] cation range is indicated.
prior to any learned on board correction.

A/F ALPHA-B1 [%] q I When the engine is running, specifi- LC

I Indicates the mean value of the air-fuel ratio cation range is indicated.
feedback correction factor per cycle. I This data also includes the data for
A/F ALPHA-B2 [%] q the air-fuel ratio learning control.
NOTE:
I Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
I Regarding A33 model, “B1” indicates bank 1 and “B2” indicates bank 2. FE
ACTIVE TEST MODE NFEC0034S07
CL
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)

I Engine: Return to the original

I Harness and connector MT
trouble condition If trouble symptom disappears, see
FUEL INJECTION I Fuel injectors
I Change the amount of fuel injec- CHECK ITEM.
I Front heated oxygen sensor
tion using CONSULT-II.
AT
I Engine: After warming up, idle
the engine.
IACV-AAC/V Engine speed changes according I Harness and connector
I Change the IACV-AAC valve
OPENING
opening percent using CON-
to the opening percent. I IACV-AAC valve AX
SULT-II.

I Engine: Return to the original I Harness and connector SU

ENG COOLANT trouble condition If trouble symptom disappears, see I Engine coolant temperature sen-
TEMP I Change the engine coolant tem- CHECK ITEM. sor
perature using CONSULT-II. I Fuel injectors BR
I Engine: Return to the original
trouble condition
If trouble symptom disappears, see ST
IGNITION TIMING I Timing light: Set I Adjust initial ignition timing
CHECK ITEM.
I Retard the ignition timing using
CONSULT-II.
RS
I Engine: After warming up, idle I Harness and connector
the engine. I Compression
POWER BAL- I A/C switch “OFF” I Injectors
ANCE I Shift lever “N”
Engine runs rough or dies.
I Power transistor
BT
I Cut off each injector signal one I Spark plugs
at a time using CONSULT-II. I Ignition coils
HA
I Ignition switch: ON I Harness and connector
COOLING FAN I Turn the cooling fan “ON” and Cooling fan moves and stops. I Cooling fan motor
“OFF” using CONSULT-II. I Cooling fan relay SC
I Ignition switch: ON
(Engine stopped)
FUEL PUMP Fuel pump relay makes the operat- I Harness and connector EL
I Turn the fuel pump relay “ON”
RELAY ing sound. I Fuel pump relay
and “OFF” using CONSULT-II
and listen to operating sound.
IDX
I Ignition switch: ON
(Engine stopped)
EGR VOL CONT/ EGR volume control valve makes I Harness and connector
I Change EGR volume control
V*2 an operating sound. I EGR volume control valve
valve opening step using CON-
SULT-II.

EC-507
 ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)

TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)

I Engine: After warming up, run

engine at 1,500 rpm.
PURG VOL I Change the EVAP canister purge Engine speed changes according I Harness and connector
CONT/V volume control solenoid valve to the opening percent. I Solenoid valve
opening percent using CON-
SULT-II.

I Ignition switch: ON
SWIRL CONT I Turn solenoid valve “ON” and Solenoid valve makes an operating I Harness and connector
SOL VALVE*1 “OFF” with CONSULT-II and lis- sound. I Solenoid valve
ten for operating sound.

I Ignition switch: ON
I Turn solenoid valve “ON” and Solenoid valve makes an operating I Harness and connector
VIAS SOL VALVE
“OFF” with CONSULT-II and lis- sound. I Solenoid valve
ten for operating sound.

I Engine: After warming up, run

engine at idle speed.
I Gear position: “D”’ range Body vibration changes according I Harness and connector
ENGINE MOUNT-
(Vehicle stopped) to the electronic controlled engine I Electronic controlled engine
ING
I Turn electronic controlled engine mount condition. mount
mount “IDLE” and “RAVEL” with
the CONSULT-II.

*1: Except VQ30DE engine models without three way catalyst

*2: Models with three way catalyst for Latin America and VQ20 engine models for South Africa

REAL TIME DIAGNOSIS IN DATA MONITOR MODE

(RECORDING VEHICLE DATA) NFEC0034S10
CONSULT-II has two kinds of triggers and they can be selected by
touching “SETTING” in “DATA MONITOR” mode.
1) “AUTO TRIG” (Automatic trigger):
I The malfunction will be identified on the CONSULT-II screen in
real time.
In other words, DTC/1st trip DTC and malfunction item will be
displayed if the malfunction is detected by ECM.
At the moment a malfunction is detected by ECM, “MONITOR”
SEF705Y in “DATA MONITOR” screen is changed to “Recording Data ...
xx%” as shown at left, and the data after the malfunction detec-
tion is recorded. Then when the percentage reached 100%,
“REAL-TIME DIAG” screen is displayed. If “STOP” is touched
on the screen during “ Recording Data ... xx%”, “REAL-TIME
DIAG” screen is also displayed.
The recording time after the malfunction detection and the
recording speed can be changed by “TRIGGER POINT” and
“Recording Speed”. Refer to CONSULT-II OPERATION
MANUAL.
2) “MANU TRIG” (Manual trigger):
I DTC/1st trip DTC and malfunction item will not be displayed
SEF707X

EC-508
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II (Cont’d)
automatically on CONSULT-II screen even though a malfunc-
tion is detected by ECM.
DATA MONITOR can be performed continuously even though GI
a malfunction is detected.
Use these triggers as follows:
1) “AUTO TRIG” MA
I While trying to detect the DTC/1st trip DTC by performing the
“DTC Confirmation Procedure”, be sure to select to “DATA EM
MONITOR (AUTO TRIG)” mode. You can confirm the malfunc-
tion at the moment it is detected.
I While narrowing down the possible causes, CONSULT-II LC
should be set in “DATA MONITOR (AUTO TRIG)” mode, espe-
cially in case the incident is intermittent.
When you are inspecting the circuit by gently shaking (or twist-
ing) the suspicious connectors, components and harness in
the “DTC Confirmation Procedure”, the moment a malfunction
is found the DTC/1st trip DTC will be displayed. (Refer to FE
GI-22, “Incident Simulation Tests”.
2) “MANU TRIG”
I If the malfunction is displayed as soon as “DATA MONITOR” CL
is selected, reset CONSULT-II to “MANU TRIG”. By selecting
“MANU TRIG” you can monitor and store the data. The data
can be utilized for further diagnosis, such as a comparison with MT
the value for the normal operating condition.
AT

AX

SU

BR

ST

RS

BT

HA

SC

EL
SEF720X

IDX

EC-509
 TROUBLE DIAGNOSIS —
INTRODUCTION WITHOUT EURO-OBD
Introduction

Introduction NFEC0036
The engine has an ECM to control major systems such as fuel
control, ignition control, idle air control system, etc. The ECM
accepts input signals from sensors and instantly drives actuators.
It is essential that both input and output signals are proper and
stable. At the same time, it is important that there are no problems
such as vacuum leaks, fouled spark plugs, or other problems with
the engine.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
MEF036D
caused by poor electric connections or improper wiring. In this
case, careful checking of suspected circuits may help prevent the
replacement of good parts.
A visual check only may not find the cause of the problems. A road
test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the “Work Flow” on EC-512.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such problems, espe-
cially intermittent ones. Find out what symptoms are present and
under what conditions they occur. A “Diagnostic Worksheet” like the
example on next page should be used.
Start your diagnosis by looking for “conventional” problems first.
SEF233G
This will help troubleshoot driveability problems on an electronically
controlled engine vehicle.

SEF234G

DIAGNOSTIC WORKSHEET NFEC0036S01

There are many operating conditions that lead to the malfunction
of engine components. A good grasp of such conditions can make
trouble-shooting faster and more accurate.
In general, each customer feels differently about a problem. It is
important to fully understand the symptoms or conditions for a
customer complaint.
Utilize a diagnostic worksheet like the one on the next page in order
to organize all the information for troubleshooting.

SEF907L

EC-510
TROUBLE DIAGNOSIS —
INTRODUCTION WITHOUT EURO-OBD
Introduction (Cont’d)
Worksheet Sample NFEC0036S0101

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MTBL0017
HA

SC

EL

IDX

EC-511
 TROUBLE DIAGNOSIS —
INTRODUCTION WITHOUT EURO-OBD
Work Flow

Work Flow NFEC0037

SEC071C

*1 EC-543 perform “TROUBLE DIAGNOSIS *5 If malfunctioning part cannot be

*2 If time data of “SELF-DIAG FOR INTERMITTENT INCIDENT”, detected, perform “TROUBLE
RESULTS” is other than “0” or EC-566. DIAGNOSIS FOR INTERMIT-
“[1t]”, perform “TROUBLE DIAG- *4 If the on board diagnostic system TENT INCIDENT”, EC-566.
NOSIS FOR INTERMITTENT cannot be performed, check main *6 EC-562
INCIDENT”, EC-566. power supply and ground circuit.
*3 If the incident cannot be verified, Refer to “TROUBLE DIAGNOSIS
FOR POWER SUPPLY”, EC-567.

EC-512
 TROUBLE DIAGNOSIS —
INTRODUCTION WITHOUT EURO-OBD
Work Flow (Cont’d)
DESCRIPTION FOR WORK FLOW NFEC0037S01

STEP DESCRIPTION GI
Get detailed information about the conditions and the environment when the incident/symptom occurred using
STEP I
the “DIAGNOSTIC WORK SHEET”, EC-511.
MA
Before confirming the concern, check and write down (print out using CONSULT-II) the (1st trip) DTC and the
(1st trip) freeze frame data, then erase the DTC and the data. (Refer to EC-492.) The (1st trip) DTC and the (1st
trip) freeze frame data can be used when duplicating the incident at STEP III & IV. EM
STEP II If the incident cannot be verified, perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
Study the relationship between the cause, specified by (1st trip) DTC, and the symptom described by the cus-
tomer. (The “Symptom Matrix Chart” will be useful. See EC-544.)
Also check related service bulletins for information.
LC
Try to confirm the symptom and under what conditions the incident occurs.
The “DIAGNOSTIC WORK SHEET” and the freeze frame data are useful to verify the incident. Connect CON-
STEP III SULT-II to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results.
If the incident cannot be verified, perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
If the malfunction code is detected, skip STEP IV and perform STEP V. FE
Try to detect the (1st trip) DTC by driving in (or performing) the “DTC Confirmation Procedure”. Check and read
the (1st trip) DTC and (1st trip) freeze frame data by using CONSULT-II.
During the (1st trip) DTC verification, be sure to connect CONSULT-II to the vehicle in DATA MONITOR (AUTO CL
TRIG) mode and check real time diagnosis results.
STEP IV
If the incident cannot be verified, perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
In case the “DTC Confirmation Procedure” is not available, perform the “Overall Function Check” instead. The MT
(1st trip) DTC cannot be displayed by this check, however, this simplified “check” is an effective alternative.
The “NG” result of the “Overall Function Check” is the same as the (1st trip) DTC detection.

Take the appropriate action based on the results of STEP I through IV. AT
If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC PXXXX.
If the normal code is indicated, proceed to the BASIC INSPECTION. (Refer to EC-514.) If CONSULT-II is
STEP V AX
available, perform “DATA MONITOR (SPEC)” mode with CONSULT-II and proceed to the “TROUBLE DIAGNO-
SIS — SPECIFICATION VALUE”. (Refer to EC-562.) (If malfunction is detected, proceed to “REPAIR/
REPLACE”.) Then perform inspections according to the Symptom Matrix Chart. (Refer to EC-544.)
SU
Identify where to begin diagnosis based on the relationship study between symptom and possible causes.
Inspect the system for mechanical binding, loose connectors or wiring damage using (tracing) “Harness Layouts”.
Gently shake the related connectors, components or wiring harness with CONSULT-II set in “DATA MONITOR
(AUTO TRIG)” mode.
BR
Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CON-
SULT-II. Refer to EC-548, 553.
STEP VI
The “Diagnostic Procedure” in EC section contains a description based on open circuit inspection. A short circuit ST
inspection is also required for the circuit check in the Diagnostic Procedure. For details, refer to GI-24, “Circuit
Inspection”.
Repair or replace the malfunction parts. RS
If malfunctioning part cannot be detected, perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”,
EC-566.

Once you have repaired the circuit or replaced a component, you need to run the engine in the same conditions
BT
and circumstances which resulted in the customer’s initial complaint.
Perform the “DTC Confirmation Procedure” and confirm the normal code [DTC No. P0000] is detected. If the
STEP VII
incident is still detected in the final check, perform STEP VI by using a different method from the previous one. HA
Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) (1st trip) DTC in
ECM. (Refer to EC-492.)
SC

EL

IDX

EC-513
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection

Basic Inspection NFEC0038

Precaution:
Perform Basic Inspection without electrical or mechanical
loads applied;
I Headlamp switch is OFF,
I Air conditioner switch is OFF,
I Rear window defogger switch is OFF,
I Steering wheel is in the straight-ahead position, etc.
MODELS WITHOUT THROTTLE OPENER NFEC0038S01

1 INSPECTION START
1. Check service records for any recent repairs that may indicate a related problem, or a current need for scheduled
maintenance.
2. Open engine hood and check the following:
I Harness connectors for improper connections
I Vacuum hoses for splits, kinks and improper connections
I Wiring for improper connections, pinches and cuts
I Air cleaner clogging
I Hoses and ducts for leaks

SEF983U

© GO TO 2.

2 CHECK THROTTLE DRUM OPERATION

Confirm that throttle drum is in contact with the stopper.

SEC016C

OK or NG
OK (With CONSULT-II) © GO TO 5.
OK (Without CONSULT- © GO TO 9.
II)
NG © GO TO 3.

EC-514
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

3 CHECK ACCELERATOR WIRE INSTALLATION

Check accelerator wire for slack. GI
OK or NG
OK © GO TO 4. MA
NG © 1. Adjust accelerator wire. Refer to FE-3, “Adjusting Accelerator Wire”.
2. GO TO 2.
EM
4 CHECK THROTTLE VALVE OPERATION
1. Remove intake air ducts. LC
2. Check throttle valve operation when moving throttle drum by hand.
OK or NG
OK © 1. Retighten the throttle drum fixing nuts.
2. GO TO 2.
NG © 1. Clean the throttle body and throttle valve.
FE
2. GO TO 2.
CL
5 CHECK THROTTLE POSITION SWITCH CLOSED POSITION
With CONSULT-II MT
1. Turn ignition switch “ON”.
2. Select ”CLSD THL/P SW” in “DATA MONITOR” mode with CONSULT-II.
3. Read “CLSD THL/P SW” signal under the following conditions.
I Insert a 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between stopper and throttle drum as
AT
shown in the figure and check the signal.
AX

SU

BR

ST
SEC017C

RS

BT

HA

SC
SEF173Y
“CLSD THL/P SW” signal should remain “ON” while inserting 0.05 mm (0.0020 in) feeler gauge.
“CLSD THL/P SW” signal should remain “OFF” while inserting 0.15 mm (0.0059 in) feeler gauge.
EL
OK or NG
OK © GO TO 8. IDX
NG © GO TO 6.

EC-515
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

6 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I

With CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.

SEC017C
3. Turn throttle position sensor body counterclockwise until “CLSD THL/P SW” signal switches to “OFF”.

SEC018C

SEF305Y

© GO TO 7.

EC-516
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

7 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II

With CONSULT-II GI
1. Temporarily tighten sensor body fixing bolts as follows.
I Gradually move the sensor body clockwise and stop it when “CLSD THL/P SW” signal switches from “OFF” to
“ON”, then temporarily tighten sensor body fixing bolts. MA

EM

LC

SEC018C
FE
2. Make sure two or three times that the signal is “ON” when the throttle valve is closed and “OFF” when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the signal remains “OFF” when the throttle valve is closed.
5. Tighten throttle position sensor.
CL
6. Check the “CLSD THL/P SW” signal again.
The signal remains “OFF” while closing throttle valve.
MT
OK or NG
OK © GO TO 8.
AT
NG © GO TO 6.

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-517
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

8 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY

With CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Remove feeler gauge.
2. Start engine.
3. Warm up engine to normal operating temperature.
4. Select “CLSD THL POS” in “DATA MONITOR” mode.
5. Stop engine. (Turn ignition switch “OFF”.)
6. Turn ignition switch “ON” and wait at least 5 seconds.

SEF864V
7. Turn ignition switch “OFF” and wait at least 10 seconds.
8. Repeat steps 6 and 7 until “CLSD THL POS” signal changes to “ON”.

SEF061Y

© GO TO 13.

EC-518
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

9 CHECK THROTTLE POSITION SWITCH CLOSED POSITION

Without CONSULT-II GI
1. Disconnect closed throttle position switch harness connector.
2. Check continuity between closed throttle position switch terminals 4 and 5 under the following conditions.
MA

EM

LC

SEF711X
I Insert the 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between the stopper and throttle drum
as shown in the figure. FE

CL

MT

AT

SEC017C
AX
“Continuity should exist” while inserting 0.05 mm (0.0020 in) feeler gauge.
“Continuity should not exist” while inserting 0.15 mm (0.0059 in) feeler gauge.
SU
OK or NG
OK © GO TO 12.
BR
NG © GO TO 10.

ST

RS

BT

HA

SC

EL

IDX

EC-519
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

10 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I

Without CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.

SEC017C
3. Turn throttle position sensor body counterclockwise until continuity does not exist.

SEF711X

SEC018C

© GO TO 11.

EC-520
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

11 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II

Without CONSULT-II GI
1. Temporarily tighten sensor body fixing bolts as follows.
I Gradually move the sensor body clockwise and stop it when the continuity comes to exist, then temporarily
tighten sensor body fixing bolts. MA

EM

LC

SEC018C
FE
2. Make sure two or three times that the continuity exists when the throttle valve is closed and continuity does not exist
when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the continuity does not exist when the throttle valve is closed.
CL
5. Tighten throttle position sensor.
6. Check the continuity again.
Continuity does not exist while closing the throttle valve.
MT
OK or NG
OK © GO TO 12. AT
NG © GO TO 10.
AX
12 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
Without CONSULT-II SU
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly. BR
1. Remove feeler gauge.
2. Reconnect throttle position switch harness connector.
3. Start engine. ST
4. Warm up engine to normal operating temperature.
5. Stop engine. (Turn ignition switch “OFF”.)
6. Turn ignition switch “ON” and wait at least 5 seconds. RS

BT

HA

SC

SEF864V EL
7. Turn ignition switch “OFF” and wait at least 10 seconds.
8. Repeat steps 6 and 7, 20 times.
© GO TO 13. IDX

EC-521
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

13 CHECK (1ST TRIP) DTC

1. Start engine and warm it up to normal operating temperature.
2. Rev (2,000 to 3,000 rpm) two or three times.
3. Make sure no (1st trip) DTC is displayed with CONSULT-II or GST.
OK or NG
OK © GO TO 15.
NG © GO TO 14.

14 REPAIR MALFUNCTION
Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.
© GO TO 13.

15 CHECK TARGET IDLE SPEED

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 25.
NG © GO TO 16.

16 PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT © GO TO 17.
INCMP © 1. Follow the construction of “Idle Air Volume Leaning”.
2. GO TO 16.

EC-522
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

17 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed. MA
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
EM
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature. LC
2. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG
FE
OK © GO TO 23.
NG © GO TO 18.
CL
18 CHECK IACV-AAC VALVE CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. MT
2. Check IACV-AAC valve circuit for open and short. Refer to “Diagnostic Procedure”, EC-731.
OK or NG AT
OK © GO TO 19.
NG © 1. Repair or replace. AX
2. GO TO 20.

19 REPLACE IACV-AAC VALVE SU

Replace IACV-AAC valve.
© GO TO 20. BR

20 PERFORM IDLE AIR VOLUME LEARNING ST

Refer to “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP?
RS
CMPLT or INCMP
CMPLT © GO TO 21.
BT
INCMP © 1. Follow the construction of “Idle Air Volume Learning”.
2. GO TO 16.
HA

SC

EL

IDX

EC-523
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

21 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 23.
NG © GO TO 22.

22 CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely
the case.)
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to “NVIS (NISSAN
VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-493.
© GO TO 16.

23 CHECK IGNITION TIMING

1. Start engine and warm it up to normal operating temperature.
2. Check ignition timing at idle using a timing light.

SEF572X
Ignition timing:
M/T 15°±5° BTDC (VQ30DE engine)
M/T 9°±5° BTDC (VQ20DE engine)
A/T 15°±5° BTDC (in “P” or “N” position) (VQ30DE engine)
A/T 9°±5° BTDC (in “P” or “N” position) (VQ20DE engine)
OK or NG
OK © GO TO 31.
NG © GO TO 24.

EC-524
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

24 CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to EM-31, “Installation”. GI
OK or NG
OK © GO TO 22. MA
NG © 1. Repair the timing chain installation.
2. GO TO 16.
EM
25 CHECK IGNITION TIMING
1. Start engine and let it idle. LC
2. Check ignition timing at idle using a timing light.

FE

CL

MT
SEF572X
Ignition timing:
M/T 15°±5° BTDC (VQ30DE engine) AT
M/T 9°±5° BTDC (VQ20DE engine)
A/T 15°±5° BTDC (in “P” or “N” position) (VQ30DE engine)
A/T 9°±5° BTDC (in “P” or “N” position) (VQ20DE engine) AX
OK or NG
OK © GO TO 31. SU
NG © GO TO 26.

BR
26 PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP?
ST
CMPLT or INCMP
CMPLT © GO TO 27.
RS
INCMP © 1. Follow the construction of “Idle Air volume Learning”.
2. GO TO 26. BT

HA

SC

EL

IDX

EC-525
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

27 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 29.
NG © GO TO 28.

28 CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function.
(ECM may be the cause of a problem, but this is rarely the case.)
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to “NVIS (NISSAN
VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-493.
© GO TO 26.

29 CHECK IGNITION TIMING AGAIN

Check ignition timing again. Refer to Test No. 25.
OK or NG
OK © GO TO 31.
NG © GO TO 30.

30 CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to EM-31, “Installation”.
OK or NG
OK © GO TO 28.
NG © 1. Repair the timing chain installation.
2. GO TO 26.

31 ERASE UNNECESSARY DTC

After this inspection, unnecessary DTC No. might be displayed.
Erase the stored memory in ECM and TCM (Transmission control module).
Refer to “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-492 and AT-38 or AT-51, “HOW TO
ERASE SELF-DIAGNOSTIC RESULTS”.
© INSPECTION END

EC-526
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)
MODELS WITH THROTTLE OPENER NFEC0038S02

1 INSPECTION START GI
1. Check service records for any recent repairs that may indicate a related problem, or a current need for scheduled
maintenance.
2. Open engine hood and check the following: MA
I Harness connectors for improper connections
I Vacuum hoses for splits, kinks and improper connections
I Wiring for improper connections, pinches and cuts EM
I Air cleaner clogging
I Hoses and ducts for leaks
LC

FE

SEF983U CL

© GO TO 2.
MT
2 CHECK THROTTLE OPENER OPERATION-I
AT
Confirm that there is a clearance between throttle drum and stopper.

AX

SU

BR

ST
SEF622X

OK or NG
RS
OK © GO TO 4.
NG © GO TO 3.
BT
3 CHECK THROTTLE OPENER FIXING BOLTS
Check throttle opener fixing bolts for loosening. HA
OK or NG
OK © 1. Repair or replace throttle body assembly. SC
2. GO TO 2.
NG © 1. Retighten the fixing bolts.
2. GO TO 2.
EL

IDX

EC-527
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

4 CHECK THROTTLE OPENER OPERATION-II

1. Start engine and let it idle.
2. Confirm that throttle opener rod moves backward and there is a clearance between throttle drum and throttle opener
rod.

SEF721X

OK or NG
OK © GO TO 7.
NG © GO TO 5.

5 CHECK VACUUM SOURCE FOR THROTTLE OPENER

1. Disconnect vacuum hose connected to throttle opener.
2. Check vacuum existence with engine running.

SEF710X

OK or NG
OK © 1. Repair or replace throttle body assembly.
2. GO TO 4.
NG © GO TO 6.

EC-528
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

6 CHECK VACUUM HOSE

1. Stop engine. GI
2. Remove the vacuum hose.
3. Check the vacuum hose for splits, kinks and clogging.
MA

EM

LC

SEF109L

OK or NG FE
OK © 1. Clean vacuum port by blowing air.
2. GO TO 4. CL
NG © 1. Replace vacuum hose.
2. GO TO 4.
MT
7 CHECK THROTTLE DRUM OPERATION
Confirm that throttle drum moves to contact the stopper. AT

AX

SU

BR

SEF622X
ST
OK or NG
OK © GO TO 10. RS
NG © GO TO 8.
BT
8 CHECK ACCELERATOR WIRE INSTALLATION
1. Stop engine. HA
2. Check accelerator wire for slack.
OK or NG
SC
OK © GO TO 9.
NG © 1. Adjust accelerator wire. Refer to FE-3, “Adjusting Accelerator Wire”.
2. GO TO 7. EL

IDX

EC-529
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

9 CHECK THROTTLE VALVE OPERATION

1. Remove intake air ducts.
2. Check throttle valve operation when moving throttle drum by hand.
OK or NG
OK © 1. Retighten the throttle drum fixing nuts.
2. GO TO 7.
NG © 1. Clean the throttle body and throttle valve.
2. GO TO 7.

10 CHECK THROTTLE POSITION SWITCH CLOSED POSITION-I

NOTE:
Always check ignition timing before performing the following.
1. Warm up engine to normal operating temperature.
2. Stop engine.
3. Remove the vacuum hose connected to the throttle opener.
4. Connect suitable vacuum hose to vacuum pump as shown below.

SEF793WA
5. Apply vacuum [more than −40.0 kPa (–400 mbar, −300 mmHg, −11.81 inHg)] until the throttle drum is free from the
throttle opener rod.
Models with CONSULT-II © GO TO 11.
Models without CON- © GO TO 15.
SULT-II

EC-530
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

11 CHECK THROTTLE POSITION SWITCH CLOSED POSITION-II

With CONSULT-II GI
1. Turn ignition switch “ON”.
2. Select “CLSD THL/P SW” in “DATA MONITOR” mode with CONSULT-II.
3. Read “CLSD THL/P SW” signal under the following conditions. MA
I Insert a 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between stopper and throttle drum as
shown in the figure and check the signal.
EM

LC

FE
SEF576X

CL

MT

AT

AX
SEF173Y
“CLSD THL/P SW” signal should remain “ON” while inserting 0.05 mm (0.0020 in) feeler gauge. SU
“CLSD THL/P SW” signal should remain “OFF” while inserting 0.15 mm (0.0059 in) feeler gauge.
OK or NG
OK © GO TO 14.
BR
NG © GO TO 12.
ST

RS

BT

HA

SC

EL

IDX

EC-531
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

12 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I

With CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Confirm that proper vacuum is applied. Refer to test No. 10. During adjustment, vacuum should be applied.
3. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.

SEF576X
4. Turn throttle position sensor body counterclockwise until “CLSD THL/P SW” signal switches to “OFF”.

SEF670X

SEF305Y

© GO TO 13.

EC-532
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

13 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II

With CONSULT-II GI
1. Temporarily tighten sensor body fixing bolts as follows.
I Gradually move the sensor body clockwise and stop it when “CLSD THL/P SW” signal switches from “OFF” to
“ON”, then temporarily tighten sensor body fixing bolts. MA

EM

LC

SEF670X
FE
2. Make sure two or three times that the signal is “ON” when the throttle valve is closed and “OFF” when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the signal remains “OFF” when the throttle valve is closed.
5. Tighten throttle position sensor.
CL
6. Check the “CLSD THL/P SW” signal again.
The signal remains “OFF” while closing throttle valve.
MT
OK or NG
OK © GO TO 14.
AT
NG © GO TO 12.

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-533
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

14 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY

With CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Confirm that proper vacuum is applied. Refer to Test No. 10.
2. Attach blind cap to vacuum port from which vacuum hose to throttle opener was disconnected.
3. Start engine.
4. Warm up engine to normal operating temperature.
5. Select “CLSD THL POS” in “DATA MONITOR” mode.
6. Stop engine. (Turn ignition switch “OFF”.)
7. Turn ignition switch “ON” and wait at least 5 seconds.

SEF864V
8. Turn ignition switch “OFF” and wait at least 10 seconds.
9. Repeat steps 7 and 8 until “CLSD THL POS” signal changes to “ON”.

SEF061Y

© GO TO 19.

EC-534
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

15 CHECK THROTTLE POSITION SWITCH CLOSED POSITION-II

1. Disconnect closed throttle position switch harness connector. GI
2. Check continuity between closed throttle position switch terminals 4 and 5 under the following conditions.

MA

EM

LC

SEF711X
I Insert the 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between the stopper and throttle drum
as shown in the figure.
FE

CL

MT

AT

SEF576X
“Continuity should exist” while inserting 0.05 mm (0.0020 in) feeler gauge.
AX
“Continuity should not exist” while inserting 0.15 mm (0.0059 in) feeler gauge.
OK or NG SU
OK © GO TO 18.
NG © GO TO 16. BR

ST

RS

BT

HA

SC

EL

IDX

EC-535
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

16 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I

1. Loosen throttle position sensor fixing bolts.
2. Confirm that proper vacuum is applied. Refer to Test No. 10. During adjustment, vacuum should be applied.
3. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.

SEF576X

SEF711X
4. Turn throttle position sensor body counterclockwise until continuity does not exist.

SEF670X

© GO TO 17.

EC-536
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

17 ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II

1. Temporarily tighten sensor body fixing bolts as follows. GI
I Gradually move the sensor body clockwise and stop it when the continuity comes to exist, then temporarily
tighten sensor body fixing bolts.
MA

EM

LC

SEF670X
2. Make sure two or three times that the continuity exists when the throttle valve is closed and continuity does not exist FE
when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the continuity does not exist when the throttle valve is closed.
5. Tighten throttle position sensor.
CL
6. Check the continuity again.
Continuity does not exist while closing the throttle valve.
MT
OK or NG
OK © GO TO 18.
AT
NG © GO TO 16.

AX
18 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi- SU
tion memory will not be reset correctly.
1. Confirm that proper vacuum is applied. Refer to Test No. 10.
2. Attach blind cap to vacuum port from which vacuum hose to throttle opener was disconnected. BR
3. Start engine.
4. Warm up engine to normal operating temperature.
5. Stop engine. (Turn ignition switch “OFF”.) ST
6. Turn ignition switch “ON” and wait at least 5 seconds.

RS

BT

HA

SC
SEF864V
7. Turn ignition switch “OFF” and wait at least 10 seconds.
8. Repeat steps 6 and 7, 20 times. EL
© GO TO 19.

IDX

EC-537
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

19 CHECK (1ST TRIP) DTC

1. Turn ignition switch “OFF”.
2. Release vacuum from throttle opener.
3. Remove vacuum pump and vacuum hose from throttle opener.
4. Reinstall original vacuum hose to throttle opener securely.
5. Start engine and warm it up to normal operating temperature.
6. Rev (2,000 to 3,000 rpm) two or three times.
7. Make sure no (1st trip) DTC is displayed with CONSULT-II or GST.
OK or NG
OK © GO TO 21.
NG © GO TO 20.

20 REPAIR MALFUNCTION
Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.
© GO TO 19.

21 CHECK TARGET IDLE SPEED

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 30.
NG © GO TO 22.

22 PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT © GO TO 23.
INCMP © 1. Follow the construction of “Idle Air Volume Leaning”.
2. GO TO 22.

EC-538
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

23 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed. MA
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
EM
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature. LC
2. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG
FE
OK © GO TO 29.
NG © GO TO 24.
CL
24 CHECK IACV-AAC VALVE CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. MT
2. Check IACV-AAC valve circuit for open and short. Refer to “Diagnostic Procedure”, EC-731.
OK or NG AT
OK © GO TO 25.
NG © 1. Repair or replace. AX
2. GO TO 26.

25 REPLACE IACV-AAC VALVE SU

Replace IACV-AAC valve.
© GO TO 26. BR

26 PERFORM IDLE AIR VOLUME LEARNING ST

Refer to “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP?
RS
CMPLT or INCMP
CMPLT © GO TO 27.
BT
INCMP © 1. Follow the construction of “Idle Air Volume Learning”.
2. GO TO 22.
HA

SC

EL

IDX

EC-539
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

27 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 29.
NG © GO TO 28.

28 CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely
the case.)
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to “NVIS (NISSAN
VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-493.
© GO TO 22.

29 CHECK IGNITION TIMING

1. Start engine and warm it up to normal operating temperature.
2. Check ignition timing at idle using a timing light.

SEF572X
Ignition timing:
M/T 15°±5° BTDC (VQ30DE engine)
M/T 9°±5° BTDC (VQ20DE engine)
A/T 15°±5° BTDC (in “P” or “N” position) (VQ30DE engine)
A/T 9°±5° BTDC (in “P” or “N” position) (VQ20DE engine)
OK or NG
OK © GO TO 37.
NG © GO TO 30.

EC-540
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

30 CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to EM-31, “Installation”. GI
OK or NG
OK © GO TO 28. MA
NG © 1. Repair the timing chain installation.
2. GO TO 16.
EM
31 CHECK IGNITION TIMING
1. Start engine and let it idle. LC
2. Check ignition timing at idle using a timing light.

FE

CL

MT
SEF572X
Ignition timing:
M/T 15°±5° BTDC (VQ30DE engine) AT
M/T 9°±5° BTDC (VQ20DE engine)
A/T 15°±5° BTDC (in “P” or “N” position) (VQ30DE engine)
A/T 9°±5° BTDC (in “P” or “N” position) (VQ20DE engine) AX
OK or NG
OK © GO TO 37. SU
NG © GO TO 32.

BR
32 PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP?
ST
CMPLT or INCMP
CMPLT © GO TO 33.
RS
INCMP © 1. Follow the construction of “Idle Air volume Learning”.
2. GO TO 32. BT

HA

SC

EL

IDX

EC-541
 TROUBLE DIAGNOSIS — BASIC
INSPECTION WITHOUT EURO-OBD
Basic Inspection (Cont’d)

33 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 625±50 rpm (VQ30DE engine)
M/T: 675±50 rpm (VQ20DE engine)
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 35.
NG © GO TO 34.

34 CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function.
(ECM may be the cause of a problem, but this is rarely the case.)
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to “NVIS (NISSAN
VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-493.
© GO TO 32.

35 CHECK IGNITION TIMING AGAIN

Check ignition timing again. Refer to Test No. 31.
OK or NG
OK © GO TO 37.
NG © GO TO 36.

36 CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to EM-31, “Installation”.
OK or NG
OK © GO TO 34.
NG © 1. Repair the timing chain installation.
2. GO TO 32.

37 ERASE UNNECESSARY DTC

After this inspection, unnecessary DTC No. might be displayed.
Erase the stored memory in ECM and TCM (Transmission control module).
Refer to “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-492 and AT-38 or AT-51, “HOW TO
ERASE SELF-DIAGNOSTIC RESULTS”.
© INSPECTION END

EC-542
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
Fail-safe Chart

Fail-safe Chart =NFEC0040

The ECM enters fail-safe mode, if any of the following malfunctions is detected due to the open or short cir-
cuit. When the ECM enters the fail-safe mode of ECM, the MIL illuminates. GI
DTC No. Detected items Engine operating condition in fail-safe mode

P0100 Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
MA
P0115 Engine coolant temperature Engine coolant temperature will be determined by ECM based on the time after
sensor circuit turning ignition switch “ON” or “START”. EM
CONSULT-II displays the engine coolant temperature decided by ECM.

Engine coolant temperature decided

Condition
(CONSULT-II display)
LC
Just as ignition switch is turned
40°C (104°F)
ON or Start

More than approx. 4 minutes

80°C (176°F)
after ignition ON or Start
FE
40 - 80°C (104 - 176°F)
Except as shown above
(Depends on the time)

P0120 Throttle position sensor cir- Throttle position will be determined based on the injected fuel amount and the
CL
cuit engine speed.
Therefore, acceleration will be poor.
MT
Condition Driving condition

When engine is idling Normal

AT
When accelerating Poor acceleration

P1335 Crankshaft position sensor Compression TDC signal (120° signal) is controlled by camshaft position sensor AX
(REF) circuit (PHASE) signal and crankshaft position sensor (POS) signal. Ignition timing will be
delayed 0° to 2°.

Unable to ECM ECM fail-safe activating condition SU

access ECM The computing function of the ECM was judged to be malfunctioning.
When the fail-safe system activates (i.e., if the ECM detects a malfunction condi-
tion in the CPU of ECM), the MIL on the instrument panel lights to warn the driver. BR
However it is not possible to access ECM and DTC cannot be confirmed.
Engine control with fail-safe
When ECM fail-safe is operating, fuel injection, ignition timing, fuel pump operation, ST
IACV-AAC valve operation and cooling fan operation are controlled under certain
limitations.

ECM fail-safe operation RS

Engine speed will not rise more than 3,000
Engine speed
rpm BT
Fuel injection Simultaneous multiport fuel injection system

Ignition timing Ignition timing is fixed at the preset valve HA

Fuel pump relay is “ON” when engine is running
Fuel pump
and “OFF” when engine stalls
SC
IACV-AAC valve Full open

Cooling fan relay “ON” (High speed condition)

Cooling fans when engine is running, and “OFF” when engine
EL
stalls.

Replace ECM, if ECM fail-safe condition is confirmed. IDX

EC-543
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
Symptom Matrix Chart

Symptom Matrix Chart NFEC0041

SYSTEM — BASIC ENGINE CONTROL SYSTEM NFEC0041S01

SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
page

IDLING VIBRATION
ENGINE STALL

Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

Fuel Fuel pump circuit 1 1 2 3 2 2 2 3 2 EC-793

Fuel pressure regulator sys-

3 3 4 4 4 4 4 4 4 4 EC-484
tem

Injector circuit 1 1 2 3 2 2 2 2 EC-783

Evaporative emission system EC-478

Air Positive crankcase ventilation 4 4 4 4 4 4 4 4

1 EC-482
system 3 3

Incorrect idle speed adjust-

1 1 1 1 1 EC-514
ment

IACV-AAC valve circuit 1 1 2 3 3 2 2 2 2 2 2 EC-728

Ignition Incorrect ignition timing adjust-

3 3 1 1 1 1 1 1 EC-514
ment

Ignition circuit 1 1 2 2 2 2 2 EC-755

EGR EGR volume control valve cir- 2

2 EC-707
cuit
3 3 3
Main power supply and ground circuit 2 EC-567
2 2 3 3 3
Air conditioner circuit 3 3 2 HA section

1 - 6: The numbers refer to the order of inspection.

(continued on next page)

EC-544
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
Symptom Matrix Chart (Cont’d)

SYMPTOM

GI

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)
MA

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

EM
Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
page

IDLING VIBRATION
LC

ENGINE STALL
FE
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

Engine Crankshaft position sensor

EC-644
CL
control (REF) circuit
2 2
Crankshaft position sensor EC-609,
(POS) circuit 651
MT
Camshaft position sensor EC-617
3
(PHASE) circuit AT
Mass air flow sensor circuit 1 2 EC-574

Front heated oxygen sensor

EC-595
AX
circuit
1 2 3 2 2 2 2
Engine coolant temperature
sensor circuit
1 3 3 EC-581 SU
Throttle position sensor circuit 2 2 EC-586
BR
Incorrect throttle position sen-
3 1 1 1 1 1 1 1 EC-514
sor adjustment

Vehicle speed sensor circuit 2 3 3 EC-724 ST

Knock sensor circuit 2 EC-604
3
ECM EC-623, RS
2 2 3 3 3 3 3 3 3 3
543

Start signal circuit 2 EC-789 BT

Park/Neutral position switch
3 3 3 EC-770
circuit
HA
Power steering oil pressure
2 EC-803
switch circuit 3 3
Electronic controlled engine
SC
EC-799
mount control circuit

Electrical load signal circuit EC-812 EL

1 - 6: The numbers refer to the order of inspection.
(continued on next page)
IDX

EC-545
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
Symptom Matrix Chart (Cont’d)
SYSTEM — ENGINE MECHANICAL & OTHER NFEC0041S02

SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
section

IDLING VIBRATION
ENGINE STALL

Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

Fuel Fuel tank FE section

5
Fuel piping 5 5 5 5 5 5

Vapor lock
5
Valve deposit

Poor fuel (Heavy weight 5 5 5 5 5 5 5

gasoline, Low octane)
—
Air Air duct

Air cleaner

Air leakage from air duct

(Mass air flow sensor —
5 5 5 5 5 5
throttle body)
5 5 5 5
Throttle body, Throttle wire FE section

Air leakage from intake

—
manifold/Collector/Gasket

Cranking Battery
1 1 1 1 1 1 1 1
Alternator circuit EL section

Starter circuit 3

Flywheel/Drive plate 6 EM section

PNP switch 4 AT section

1 - 6: The numbers refer to the order of inspection.

(continued on next page)

EC-546
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
Symptom Matrix Chart (Cont’d)

SYMPTOM

GI

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)
MA

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

EM
Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
section

IDLING VIBRATION
LC

ENGINE STALL
FE
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

Engine Cylinder head CL

5 5 5 5 5 5 5 5
Cylinder head gasket 4 3

Cylinder block MT
Piston 4

Piston ring AT
6 6 6 6 6 6 6 6
Connecting rod
EM section AX
Bearing

Crankshaft
SU
Valve Timing chain
mecha-
nism Camshaft
5 5 5 5 5 5 5 5 BR
Intake valve
3
Exhaust valve
ST
Exhaust Exhaust manifold/Tube/
Muffler/Gasket 5 5 5 5 5 5 5 5 FE section
Three way catalyst
RS
Lubrica- Oil pan/Oil strainer/Oil pump/ MA, EM, LC
tion Oil filter/Oil gallery 5 5 5 5 5 5 5 5 section BT
Oil level (Low)/Filthy oil LC section

Cooling Radiator/Hose/Radiator filler HA

cap

Thermostat 5
SC
Water pump
5 5 5 5 5 5 5 4 5
Water gallery EL
Cooling fan 5 EC section

Coolant level (low)/

MA section IDX
Contaminated coolant

1 - 6: The numbers refer to the order of inspection.

EC-547
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
Symptom Matrix Chart (Cont’d)

SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
HARD/NO START/RESTART (EXCP. HA)

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
section

IDLING VIBRATION
ENGINE STALL
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

NVIS (NISSAN Vehicle Immobilizer Sys- EC-493 or

1 1
tem — NATS) EL section

1 - 6: The numbers refer to the order of inspection.

CONSULT-II Reference Value in Data Monitor

Mode NFEC0042
Remarks:
I Specification data are reference values.
I Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in
spite of the ignition timing not being adjusted to the specification data. This IGN TIMING monitors the data calculated by the ECM
according to the signals input from the camshaft position sensor and other ignition timing related sensors.
I If the real-time diagnosis results are NG and the on board diagnostic system results are OK when diagnosing the mass air flow sensor,
first check to see if the fuel pump control circuit is normal.

MONITOR ITEM CONDITION SPECIFICATION

I Tachometer: Connect
ENG SPEED Almost the same speed as
I Run engine and compare tachometer indication with the CONSULT-II
CKPS·RPM (POS) the CONSULT-II value.
value.

POS COUNT I Engine: Running 179 - 181

I Engine: After warming up Idle 1.2 - 1.8V

I Air conditioner switch: “OFF”
MAS A/F SE-B1
I Shift lever: “N”
I No-load 2,500 rpm 1.6 - 2.2V

COOLAN TEMP/S I Engine: After warming up More than 70°C (158°F)

HO2S1 (B1) 0 - 0.3V +, Approx. 0.6 -

HO2S1 (B2) 1.0V
Maintaining engine speed at 2,000
I Engine: After warming up LEAN +, RICH
HO2S1 MNTR (B1) rpm
Changes more than 5 times
HO2S1 MNTR (B2)
during 10 seconds.

HO2S2 (B1) 0 - 0.3V +, Approx. 0.6 -

HO2S2 (B2) Maintaining engine speed at 2,000 1.0V
I Engine: After warming up
HO2S2 MNTR (B1) rpm
LEAN +, RICH
HO2S2 MNTR (B2)

EC-548
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II Reference Value in Data Monitor Mode (Cont’d)

MONITOR ITEM CONDITION SPECIFICATION

VHCL SPEED SE
I Turn drive wheels and compare speedometer indication with the CON- Almost the same speed as GI
SULT-II value the CONSULT-II value

BATTERY VOLT I Ignition switch: ON (Engine stopped) 11 - 14V

MA
I Engine: After warming up, idle
Throttle valve: fully closed 0.15 - 0.85V
the engine
THRTL POS SEN I Engine: After warming up
EM
I Ignition switch: ON Throttle valve: fully opened 3.5 - 4.7V
(Engine stopped)
LC
EGR TEMP SEN I Engine: After warming up Less than 4.5V

START SIGNAL I Ignition switch: ON , START , ON OFF , ON , OFF

CLSD THL POS I Engine: After warming up, idle Throttle valve: Idle position ON
CLSD THL/P SW the engine Throttle valve: Slightly open OFF FE
Air conditioner switch: “OFF” OFF
I Engine: After warming up, idle
AIR COND SIG
the engine Air conditioner switch: “ON”
ON CL
(Compressor operates.)

Shift lever: “P” or “N” (A/T models)

Neutral (M/T models)
ON MT
P/N POSI SW I Ignition switch: ON
Except above OFF

Steering wheel in neutral position

AT
I Engine: After warming up, idle OFF
PW/ST SIGNAL (forward direction)
the engine
The steering wheel is turned ON AX
I Ignition switch: ON Below 19°C (66°F) OFF
AMB TEMP SW I Compare ambient air tempera-
ture with the following: Above 25°C (77°F) ON SU
IGNITION SW I Ignition switch: ON , OFF , ON ON , OFF , ON

I Engine: After warming up

BR
Idle 2.4 - 3.2 msec
INJ PULSE-B2 I Air conditioner switch: “OFF”
INJ PULSE-B1 I Shift lever: “N”
I No-load 2,000 rpm 1.9 - 2.8 msec ST
I Engine: After warming up Idle 2.0 - 3.2 msec
I Air conditioner switch: “OFF” RS
B/FUEL SCHDL
I Shift lever: “N”
I No-load 2,000 rpm 1.4 - 2.6 msec

I Engine: After warming up Idle 15°±5° BTDC

BT
I Air conditioner switch: “OFF”
IGN TIMING
I Shift lever: “N”
I No-load 2,000 rpm More than 25° BTDC HA
I Engine: After warming up Idle 2 - 10 step
I Air conditioner switch: “OFF”
IACV-AAC/V
I Shift lever: “N”
SC
I No-load 2,000 rpm —

I Engine: After warming up Idle 0% EL

I Air conditioner switch: “OFF”
PURG VOL C/V
I Shift lever: “N”
I 2,000 rpm —
No-load IDX
A/F ALPHA-B2 Maintaining engine speed at 2,000
I Engine: After warming up 54 - 155%
A/F ALPHA-B1 rpm

AIR COND RLY I Air conditioner switch: OFF , ON OFF , ON

EC-549
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
CONSULT-II Reference Value in Data Monitor Mode (Cont’d)

MONITOR ITEM CONDITION SPECIFICATION

I Ignition switch is turned to ON (Operates for 5 seconds)

ON
FUEL PUMP RLY I Engine running and cranking

Except as shown above OFF

Engine coolant temperature is 94°C

OFF
(201°F) or less

I After warming up engine, idle Engine coolant temperature is

COOLING FAN the engine. between 95°C (203°F) and 104°C Low
I Air conditioner switch: “OFF” (218°F)

Engine coolant temperature is 105°C

HIGH
(221°F) or more

I Engine: After warming up Idle 0 step

I Air conditioner switch: “OFF”
EGR VOL CON/V
I Shift lever: “N” Engine speed: Revving from idle up
10 - 55 step
I No-load to 3,000 rpm quickly

HO2S1 HTR (B1) I Engine speed: Below 3,600 rpm ON

HO2S1 HTR (B2) I Engine speed: Above 3,600 rpm OFF

I Ignition switch: ON (Engine stopped)

OFF
HO2S2 HTR (B1) I Engine speed: Above 3,600 rpm
HO2S2 HTR (B2) I Engine speed: Below 3,600 rpm [After driving for 2 minutes at a speed
ON
of 70 km/h (43 MPH) or more]

I Engine: After warming up Idle 14.0 - 33.0%

I Air conditioner switch: “OFF”
CAL/LD VALUE
I Shift lever: “N”
I No-load 2,500 rpm 12.0 - 25.0%

I Engine: After warming up Throttle valve: fully closed 0.0%

ABSOL TH·P/S I Engine: After warming up

I Ignition switch: ON Throttle valve: fully opened Approx. 80%
(Engine stopped)

I Engine: After warming up Idle 2.0 - 6.0 g·m/s

I Air conditioner switch: “OFF”
MASS AIRFLOW
I Shift lever: “N”
I No-load 2,500 rpm 7.0 - 20.0 g·m/s

ABSOL PRES/SE I Ignition switch: ON Approx. 4.4V

Engine coolant temperature is

between 15°C (59°F) to 50°C ON
SWRL CONT S/V I Engine speed: Idle (122°F).

Engine coolant temperature is above

OFF
50°C (131°F).

Idle “IDLE”
ENGINE MOUNT I Engine: Running
2,000 rpm “TRVL”

Major Sensor Reference Graph in Data Monitor

Mode NFEC0043
The following are the major sensor reference graphs in “DATA MONITOR” mode.
THRTL POS SEN, ABSOL TH·P/S, CLSD THL POS NFEC0043S01
Below is the data for “THRTL POS SEN”, “ABSOL TH·P/S” and “CLSD THL POS” when depressing the accel-
erator pedal with the ignition switch “ON”.
The signal of “THRTL POS SEN” and “ABSOL TH·P/S” should rise gradually without any intermittent drop or
rise after “CLSD THL POS” is changed from “ON” to “OFF”.

EC-550
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
Major Sensor Reference Graph in Data Monitor Mode (Cont’d)

GI

MA

EM

SEF306Y
LC
ENG SPEED, MAS A/F SE-B1, THRTL POS SEN, HO2S2 (B1), HO2S1 (B1), INJ PULSE-B1
NFEC0043S02
Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL POS SEN”, “HO2S2 (B1)”, “HO2S1 (B1)” and
“INJ PULSE-B1” when revving engine quickly up to 4,800 rpm under no load after warming up engine suffi-
ciently.
Each value is for reference, the exact value may vary. FE

CL

MT

AT

AX

SU

BR

SEF241Y ST

RS

BT

HA

SC

EL

IDX

EC-551
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
Major Sensor Reference Graph in Data Monitor Mode (Cont’d)

SEF242YA

EC-552
TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value

ECM Terminals and Reference Value NFEC0044

PREPARATION
1.
NFEC0044S01
ECM is located behind the instrument lower cover. For this
GI
inspection, remove instrument lower cover.
MA

EM

SEF575XA LC
2. Remove ECM harness protector.

FE

CL

SEF038Y
MT
3. Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily. AT
I Open harness securing clip to make testing easier.
I Use extreme care not to touch 2 pins at one time.
I Data is for comparison and may not be exact. AX

SU

BR
MEC486B

ECM HARNESS CONNECTOR TERMINAL LAYOUTNFEC0044S02

ST

RS

BT

HA
SEF970W
SC
ECM INSPECTION TABLE NFEC0044S03
Specification data are reference values and are measured between EL
each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/ IDX
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.

EC-553
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
I Idle speed

EVAP canister purge SEF994U

1 PU/R volume control sole-
noid valve BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
I Engine speed is about 2,000 rpm (More than 100
seconds after starting engine).

SEF995U

[Engine is running]
0 - 1.0V
Heated oxygen sensor I Engine speed is below 3,600 rpm.
2*1 R/L 1 heater (front) (bank
2) [Engine is running] BATTERY VOLTAGE
I Engine speed is above 3,600 rpm. (11 - 14V)

[Engine is running]
0 - 1.0V
Heated oxygen sensor I Engine speed is below 3,600 rpm.
3*1 OR/L 1 heater (front) (bank
1) [Engine is running] BATTERY VOLTAGE
I Engine speed is above 3,600 rpm. (11 - 14V)

[Engine is running]
I Engine speed is below 3,600 rpm.
0 - 1.0V
I After driving for 2 minutes at a speed of 70 km/h
Heated oxygen sensor (43 MPH) or more.
4*1 R/L 2 heater (rear) (bank
2) [Ignition switch “ON”]
I Engine stopped BATTERY VOLTAGE
[Engine is running] (11 - 14V)
I Engine speed is above 3,600 rpm.

[Engine is running]
I Engine speed is below 3,600 rpm.
0 - 1.0V
I After driving for 2 minutes at a speed of 70 km/h
Heated oxygen sensor (43 MPH) or more.
5*1 P/B 2 heater (rear) (bank
1) [Ignition switch “ON”]
I Engine stopped BATTERY VOLTAGE
[Engine is running] (11 - 14V)
I Engine speed is above 3,600 rpm.

6 W/PU
7 Y/B [Engine is running]
IACV-AAC valve 0.1 - 14V
8 Y I Idle speed
17 GY/R

9*5 G
10*5 L/B EGR volume control [Engine is running]
0.1 - 14V
18*5 BR valve I Idle speed
19*5 P

EC-554
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
NO.
COLOR GI
[Engine is running] BATTERY VOLTAGE
VIAS control solenoid I Idle speed (11 - 14V) MA
16 Y/G
valve [Engine is running]
0 - 1.0V
I Engine speed is above 5,000 rpm.
EM
0 - 0.2V★

LC
[Engine is running]
I Warm-up condition
I Idle speed
21 Y/R Ignition signal No. 1
22 G/R Ignition signal No. 2
SEF399T
23 L/R Ignition signal No. 3
30 GY Ignition signal No. 4
FE
0.1 - 0.3V★
31 PU/W Ignition signal No. 5
32 GY/R Ignition signal No. 6
CL
[Engine is running]
I Warm-up condition
I Engine speed is 2,500 rpm.
MT
SEF645T
AT
[Ignition switch “ON”]
I For 1 second after turning ignition switch “ON” 0 - 1.5V

24*2 B/P Fuel pump relay

[Engine is running] AX
[Ignition switch “ON”]
BATTERY VOLTAGE
I 1 second passed after turning ignition switch
“ON”.
(11 - 14V) SU
9 - 11V★
BR
[Engine is running]
I Warm-up condition
I Idle speed
ST

SEF579X RS
25 W/G Tachometer
9 - 11V★
BT
[Engine is running]
I Warm-up condition
I Engine speed is 2,500 rpm.
HA

SEF580X
SC
[Engine is running]
[Ignition switch “OFF”]
0 - 1.5V EL
I For a few seconds after turning ignition switch
ECM relay “OFF”
26 W/B
(Self shutt-off)
[Ignition switch “OFF”] IDX
BATTERY VOLTAGE
I A few seconds passed after turning ignition
(11 - 14V)
switch “OFF”

EC-555
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

[Engine is running]
I Both A/C switch and blower switch are “ON” 0 - 1.0V
27 B/R Air conditioner relay (Compressor is operating).

[Engine is running] BATTERY VOLTAGE

I A/C switch is “OFF”. (11 - 14V)

[Ignition switch “ON”]

I For 1 second after turning ignition switch “ON” 0 - 1.5V
[Engine is running]
28*3 B/P Fuel pump relay
[Ignition switch “ON”]
BATTERY VOLTAGE
I 1 second passed after turning ignition switch
(11 - 14V)
“ON”.

[Engine is running]
I Idle speed
0 - 1.0V
I Engine coolant temperature is between 15 to
Swirl control valve con- 50°C (59 to 122°F).
29*4 G
trol solenoid valve [Engine is running]
I Idle speed BATTERY VOLTAGE
I Engine coolant temperature is above 50°C (11 - 14V)
(122°F).

[Engine is running]
0 - 1.0V
Cooling fan relay I Cooling fan is operating at high speed.
34 LG
(High) [Engine is running] BATTERY VOLTAGE
I Cooling fan is not operating. (11 - 14V)

[Engine is running]
0 - 1.0V
I Cooling fan is operating.
35 BR/R Cooling fan relay (Low)
[Engine is running] BATTERY VOLTAGE
I Cooling fan is not operating. (11 - 14V)

Approximately 0 - 5V
[Engine is running]
36 Y A/T signal No. 3 Output voltage fluctuates peri-
I Idle speed
odically.

Approximately 0 - 5V
[Engine is running]
37 LG A/T signal No. 5 Output voltage fluctuates peri-
I Idle speed
odically.

[Ignition switch “ON”] 0 - 1.0V

38 LG/B MIL [Engine is running] BATTERY VOLTAGE
I Idle speed (11 - 14V)

[Ignition switch “ON”] Approximately 0V

42 BR/W Start signal
[Ignition switch “START”] 9 - 12V

[Ignition switch “OFF”] 0V

43 R Ignition switch BATTERY VOLTAGE
[Ignition switch “ON”]
(11 - 14V)

[Ignition switch “ON”]

G/OR I Gear position is “Neutral position” (M/T models). Approximately 0V
44
(A/T)
PNP switch I Gear position is “P” or “N” (A/T models).
G/W
(M/T) [Ignition switch “ON”] BATTERY VOLTAGE
I Except the above gear position (11 - 14V)

EC-556
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
NO.
COLOR GI
[Engine is running]
Approximately 0V
Air conditioner switch I Both A/C switch and blower switch are “ON”. MA
45 G/B
signal [Engine is running] BATTERY VOLTAGE
I A/C switch is “OFF”. (11 - 14V)
EM
[Engine is running]
I Idle speed
0V
I Ambient air temperature is above 25°C (77°F). LC
Ambient air tempera- I Air conditioner is operating.
46 W/L
ture switch signal [Engine is running]
I Idle speed
Approximately 5V
I Ambient air temperature is above 25°C (77°F).
I Air conditioner is not operating.

[Engine is running]
FE
0 - 1.0V
Power steering oil I Steering wheel is being turned.
47 G
pressure switch [Engine is running] BATTERY VOLTAGE CL
I Steering wheel is not being turned. (11 - 14V)

[Engine is running]
48 B ECM ground
I Idle speed
Engine ground MT
[Engine is running]
0 - 1.0V
Electronic controlled I Idle speed AT
49 W
engine mount-1 [Engine is running] BATTERY VOLTAGE
I Except the above (11 - 14V)
AX
[Engine is running] BATTERY VOLTAGE
Electronic controlled I Idle speed (11 - 14V)
50 W/R
engine mount-2 [Engine is running]
SU
0 - 1.0V
I Except the above

51 PU A/C cut signal

[Engine is running]
0 - 0.5V
BR
I Air conditioner is operating.

[Engine is running]
I Rear window defogger: ON
BATTERY VOLTAGE ST
(11 - 14V)
52 W/G Electrical load signal I Hi-beam headlamp: ON

[Engine is running]
0V
RS
I Electrical load: OFF

[Engine is running] BATTERY VOLTAGE

BT
Throttle position switch I Accelerator pedal fully released (11 - 14V)
56 GY/L
(Closed position) [Engine is running]
Approximately 0V
I Accelerator pedal depressed HA
[Engine is running]
57 B ECM ground Engine ground
I Idle speed
SC
[Engine is running]
58 B Sensors’ ground I Warm-up condition Approximately 0V
I Idle speed EL
Approximately 0 - 2.0V
A/T diagnosis commu- [Engine is running]
60 BR/W Output voltage fluctuates peri-
nication line I Idle speed IDX
odically.

EC-557
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

[Engine is running]
I Warm-up condition 1.2 - 1.8V
I Idle speed
61 W Mass air flow sensor
[Engine is running]
I Warm-up condition 1.6 - 2.2V
I Engine speed is 2,500 rpm.

0 - Approximately 1.0V (Peri-

odically change)

[Engine is running]
Heated oxygen sensor
62*1 W I Warm-up condition
1 (front) (bank 2)
I Engine speed is 2,000 rpm.

SEF059V

0 - Approximately 1.0V (Peri-

odically change)

[Engine is running]
Hheated oxygen sen-
63*1 W I Warm-up condition
sor 1 (front) (bank 1)
I Engine speed is 2,000 rpm.

SEF059V

Approximately 0 - 4.8V
Intake air temperature
64 Y/G [Engine is running] Output voltage varies with
sensor
intake air temperature.

Approximately 2.3V★
(AC voltage)

65*3 W
[Engine is running]
75*3 W Crankshaft position
I Warm-up condition
66*2 W sensor (REF)
I Idle speed
76*2 W

SEF581X

Approximately 4.2V★
(AC voltage)

65*2
[Engine is running]
75*2 W Camshaft position sen-
I Warm-up condition
66*3 W sor (PHASE)
I Idle speed
76*3

SEF582X

Power supply for ECM BATTERY VOLTAGE

67 W/L [Ignition switch “OFF”]
(Buck-up) (11 - 14V)

Approximately 0 - 5V
[Engine is running]
68 BR A/T signal No. 1 Output voltage fluctuates peri-
I Idle speed
odically.

EC-558
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
NO.
COLOR GI
[Ignition switch “ON”]
69 GY Data link connector Approximately 0V
I CONSULT-II is turned “ON”. MA
Approximately 0 - 4.8V
Engine coolant tem-
70 Y [Engine is running] Output voltage varies with
perature sensor EM
engine coolant temperature.

[Engine is running]
Heated oxygen sensor
71*1 W I Warm-up condition 0 - Approximately 1.0V LC
2 (rear) (bank 2)
I Engine speed is 2,000 rpm.

[Engine is running]
Heated oxygen sensor
72*1 W I Warm-up condition 0 - Approximately 1.0V
2 (rear) (bank 1)
I Engine speed is 2,000 rpm.

[Engine is running]
73 B
Mass air flow sensor
I Warm-up condition Approximately 0V
FE
ground
I Idle speed

[Ignition switch “ON”] Less than 4.5V CL

EGR temperature sen- [Engine is running]
74*5 SB
sor I Warm-up condition 0 - 1.5V
I EGR system is operating.
MT
Approximately 0 - 5V
[Engine is running]
77 GY A/T signal No. 2
I Idle speed
Output voltage fluctuates peri- AT
odically.

Approximately 0 - 5V
78 OR A/T signal No. 4
[Engine is running]
Output voltage fluctuates peri-
AX
I Idle speed
odically.

80 W
Absolute pressure sen-
[Ignition switch “ON”] Approximately 4.4V
SU
sor

[Engine is running]
Refrigerant pressure I Warm-up condition BR
81 W 0.36 - 3.88V
sensor I Both A/C switch and blower switch are “ON”.
(Compressor operates.)
ST
[Engine is running]
I Warm-up condition Approximately 0.4V
Throttle position sensor I Accelerator pedal fully released
82 W
signal output
RS
[Ignition switch “ON”]
Approximately 4V
I Accelerator pedal fully depressed
BT

HA

SC

EL

IDX

EC-559
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Approximately 2.4V

[Engine is running]
I Idle speed

SEF057V
Crankshaft position
85 W
sensor (POS) Approximately 2.3V

[Engine is running]
I Engine speed is 2,000 rpm.

SEF058V

Approximately 2.5V

[Engine is running]
I Jack up front wheels.
I In 1st gear position
I 10 km/h (6 MPH)

SEF583X
86 P/L Vehicle speed sensor
Approximately 2.0V

[Engine is running]
I Jack up front wheels.
I In 2nd gear position
I 30 km/h (19 MPH)

SEF584X

[Engine is running]
I Warm-up condition 0.15 - 0.85V
91 L/W Throttle position sensor I Accelerator pedal fully released
[Ignition switch “ON”]
3.5 - 4.7V
I Accelerator pedal fully depressed

Approximately 0 - 4.8V
Fuel tank temperature
92 P/L [Engine is running] Output voltage varies with
sensor
fuel tank temperature.

[Engine is running]
93 W Knock sensor Approximately 2.5V
I Idle speed

[Ignition switch “ON”]

95 BR Data link connector Approximately 0V
I CONSULT-II is turned “ON”.

101 R/B Injector No. 1

102 L/W Injector No. 5
103 R/W Injector No. 2 [Engine is running] BATTERY VOLTAGE
104 PU/R Injector No. 6 I Idle speed (11 - 14V)
105 R/Y Injector No. 3
107 R/L Injector No. 4

EC-560
 TROUBLE DIAGNOSIS — GENERAL
DESCRIPTION WITHOUT EURO-OBD
ECM Terminals and Reference Value (Cont’d)

TERMI-
WIRE
NAL ITEM CONDITION DATA (DC Voltage)
NO.
COLOR GI
106 B [Engine is running]
ECM ground Engine ground
108 B I Idle speed MA
110 R/G BATTERY VOLTAGE
Power supply for ECM [Ignition switch “ON”]
112 R/G (11 - 14V)
EM
111 R Sensors’ power supply [Ignition switch “ON”] Approximately 5V

[Ignition switch “ON”]

115 OR Data link connector
I CONSULT-II is turned “ON”.
Approximately 2 - 11V LC
★: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
*1: Models with three way catalyst
*2: Models without immobilizer
*3: Models with immobilizer
*4: Models except VQ30DE engine models without three way catalyst FE
*5: Models with three way catalyst for Latin America and VQ20DE engine models for South Africa

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-561
 TROUBLE DIAGNOSIS — SPECIFICATION
VALUE WITHOUT EURO-OBD
Description

Description NFEC0654
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:
I B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)
I A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
I MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing Condition NFEC0655
I Vehicle driven distance: More than 5,000 km (3,107 miles)
I Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm2, 14.25 - 15.12 psi)
I Atmospheric temperature: 20 - 30°C (68 - 86°F)
I Engine coolant temperature: 75 - 95°C (167 - 203°F)
I Transmission: Warmed-up*1
I Electrical load: Not applied*2
I Engine speed: Idle
*1: For A/T or CVT models, after the engine is warmed up to normal operating temperature, drive vehicle until
“FLUID TEMP SE” (A/T or CVT fluid temperature sensor signal) indicates less than 0.9V. For M/T models, drive
vehicle for 5 minutes after the engine is warmed up to normal operating temperature.
*2: Rear window defogger switch, air conditioner switch, lighting switch are “OFF”. Cooling fans are not oper-
ating. Steering wheel is straight ahead.

Inspection Procedure NFEC0656

NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale dis-
play.
1. Perform “Basic Inspection”, EC-514.
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1/B2” and “MAS A/F
SE-B1” in “DATA MONITOR (SPEC)” mode with CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to “Diagnostic Procedure”, EC-563.
SEF601Z

EC-562
TROUBLE DIAGNOSIS — SPECIFICATION
VALUE WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0657

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SEF613ZA

EC-563
 TROUBLE DIAGNOSIS — SPECIFICATION
VALUE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

SEF768Z

EC-564
TROUBLE DIAGNOSIS — SPECIFICATION
VALUE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX
SEF615Z

EC-565
 TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT WITHOUT EURO-OBD
Description

Description NFEC0045
Intermittent incidents (I/I) may occur. In many cases, the problem resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the custom-
er’s complaint often do not recur on (1st trip) DTC visits. Realize also that the most frequent cause of I/I
occurrences is poor electrical connections. Because of this, the conditions under which the incident occurred
may not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indi-
cate the specific problem area.
COMMON I/I REPORT SITUATIONS NFEC0045S01

STEP in Work Flow Situation

II The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than “0” or “[1t]”.

III The symptom described by the customer does not recur.

IV (1st trip) DTC does not appear during the DTC Confirmation Procedure.

VI The Diagnostic Procedure for PXXXX does not indicate the problem area.

Diagnostic Procedure NFEC0046

1 INSPECTION START
Erase (1st trip) DTCs. Refer to “HOW TO ERASE EMISSION — RELATED INFORMATION”, EC-492.
© GO TO 2.

2 CHECK GROUND TERMINALS

Check ground terminals for corroding or loose connection.
Refer to GI-27, “GROUND INSPECTION”.
OK or NG
OK © GO TO 3.
NG © Repair or replace.

3 SEARCH FOR ELECTRICAL INCIDENT

Perform GI-22, “Incident Simulation Tests”.
OK or NG
OK © INSPECTION END
NG © Repair or replace.

EC-566
TROUBLE DIAGNOSIS FOR POWER
SUPPLY WITHOUT EURO-OBD
Main Power Supply and Ground Circuit

Main Power Supply and Ground Circuit

WIRING DIAGRAM NFEC0047
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC834C

EC-567
 TROUBLE DIAGNOSIS FOR POWER
SUPPLY WITHOUT EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

MEC717C

SEF366Z

EC-568
 TROUBLE DIAGNOSIS FOR POWER
SUPPLY WITHOUT EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)
DIAGNOSTIC PROCEDURE NFEC0049

1 INSPECTION START GI
Start engine.
Is engine running?
Yes or No
MA
Yes © GO TO 9.
No © GO TO 2. EM

2 CHECK ECM POWER SUPPLY CIRCUIT-I LC

1. Turn ignition switch “OFF” and then “ON”.
2. Check voltage between ECM terminal 43 and ground with CONSULT-II or tester.

FE

CL

MT
SEF291X
AT
OK or NG
OK © GO TO 4.
NG © GO TO 3.
AX

3 DETECT MALFUNCTIONING PART SU

Check the following.
I Harness connectors M46, F44 BR
I Fuse block (J/B) connector M19, E89
I 10A fuse
I Harness for open or short between ECM and ignition switch ST
© Repair harness or connectors.

RS
4 CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector. BT
3. Check harness continuity between ECM terminals 48, 57, 106, 108 and engine ground.
Refer to WIRING DIAGRAM.
Continuity should exist. HA
4. Also check harness for short to power.
OK or NG
SC
OK © GO TO 5.
NG © Repair open circuit or short to power in harness or connectors.
EL

IDX

EC-569
 TROUBLE DIAGNOSIS FOR POWER
SUPPLY WITHOUT EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

5 CHECK POWER SUPPLY-II

1. Disconnect ECM relay.

SEF589PB
2. Check voltage between ECM relay terminals 2, 6 and ground with CONSULT-II or tester.

SEF292X

OK or NG
OK © GO TO 7.
NG © GO TO 6.

6 DETECT MALFUNCTIONING PART

Check the following.
I 15A fuses
I Harness for open or short between ECM relay and battery
© Repair open circuit or short to ground or short to power in harness or connectors.

7 CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal 26 and ECM relay terminal 1.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK © Go to “IGNITION SIGNAL”, EC-755.
NG © GO TO 8.

8 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E15, F18
I Harness for open or short between ECM relay and ECM
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-570
 TROUBLE DIAGNOSIS FOR POWER
SUPPLY WITHOUT EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

9 CHECK ECM POWER SUPPLY CIRCUIT-II

1. Stop engine. GI
2. Check voltage between ECM terminal 67 and ground with CONSULT-II or tester.

MA

EM

LC

SEF293X

OK or NG
OK © GO TO 11. FE
NG © GO TO 10.
CL
10 DETECT MALFUNCTIONING PART
Check the following. MT
I Harness connectors E15, F18
I Harness for open or short between ECM and fuse
© Repair harness or connectors. AT

11 CHECK ECM POWER SUPPLY CIRCUIT-III AX

1. Turn ignition switch “ON” and then “OFF”.
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.
SU

BR

ST

RS
SEF294X
BT
OK or NG
OK © GO TO 17.
HA
NG (Battery voltage © GO TO 12.
does not exist.)
NG (Battery voltage © GO TO 14. SC
exists for more than a
few seconds.)
EL

IDX

EC-571
 TROUBLE DIAGNOSIS FOR POWER
SUPPLY WITHOUT EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

12 CHECK ECM POWER SUPPLY CIRCUIT-IV

1. Disconnect ECM relay.

SEF589PB
2. Check voltage between ECM relay terminal 3 and ground with CONSULT-II or tester.

SEF295X

OK or NG
OK © GO TO 14.
NG © GO TO 13.

13 DETECT MALFUNCTIONING PART

Check the following.
I Harness for open or short between ECM relay and 15A fuse
© Repair open circuit or short to ground or short to power in harness or connectors.

14 CHECK HARNESS CONTINUITY BETWEEN ECM RELAY AND ECM FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals 110, 112 and ECM relay terminal 5.
Refer to WIRING DIAGRAM.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 16.
NG © GO TO 15.

15 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E15, F18
I Harness for open or short between ECM and ECM relay
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-572
 TROUBLE DIAGNOSIS FOR POWER
SUPPLY WITHOUT EURO-OBD
Main Power Supply and Ground Circuit (Cont’d)

16 CHECK ECM RELAY

1. Apply 12V direct current between ECM relay terminals 1 and 2. GI
2. Check continuity between relay terminals 3 and 5, 6 and 7.

MA

EM

LC

SEF296X

OK or NG
OK © GO TO 17. FE
NG © Replace ECM relay.
CL
17 CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II
1. Turn ignition switch “OFF”. MT
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 48, 57, 106, 108 and engine ground.
Refer to WIRING DIAGRAM. AT
Continuity should exist.
4. Also check harness for short to power.
OK or NG AX
OK © GO TO 18.
NG © Repair open circuit or short to power in harness or connectors. SU

18 CHECK INTERMITTENT INCIDENT BR

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END ST

RS

BT

HA

SC

EL

IDX

EC-573
 DTC P0100 MASS AIR FLOW SENSOR
(MAFS) WITHOUT EURO-OBD
Component Description

Component Description NFEC0050

The mass air flow sensor is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. It consists of a hot wire that is supplied with electric
current from the ECM. The temperature of the hot wire is controlled
by the ECM a certain amount. The heat generated by the hot wire
is reduced as the intake air flows around it. The more air, the
greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot wire as air flow increases. The ECM
SEF987W
detects the air flow by means of this current change.

CONSULT-II Reference Value in Data Monitor

Mode NFEC0051
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Engine: After warming up Idle 1.2 - 1.8V

I Air conditioner switch: “OFF”
MAS A/F SE-B1
I Shift lever: “N”
I No-load 2,500 rpm 1.6 - 2.2V

Idle 14.0 - 33.0%

CAL/LD VALUE ditto
2,500 rpm 12.0 - 25.0%

Idle 2.0 - 6.0 g·m/s

MASS AIRFLOW ditto
2,500 rpm 7.0 - 20.0 g·m/s

On Board Diagnosis Logic NFEC0053

Malfunction is detected when
(Malfunction A) an excessively high voltage from the sensor is
sent to ECM when engine is not running,
(Malfunction B) an excessively low voltage from the sensor is sent
to ECM when engine is running,
(Malfunction C) a voltage from the sensor is constantly approx.
1.0V when engine is running.
FAIL-SAFE MODE NFEC0053S02
When the malfunction B is detected, the ECM enters fail-safe mode
and the MIL lights up.
Detected items Engine operating condition in fail-safe mode

Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.

EC-574
DTC P0100 MASS AIR FLOW SENSOR
(MAFS) WITHOUT EURO-OBD
Possible Cause

Possible Cause NFEC0426

MALFUNCTION A
I Harness or connectors
NFEC0426S01
GI
(The sensor circuit is open or shorted.)
I Mass air flow sensor MA
MALFUNCTION B OR C NFEC0426S02
I Harness or connectors EM
(The sensor circuit is open or shorted.)
I Intake air leaks
I Mass air flow sensor LC
DTC Confirmation Procedure NFEC0054
Perform “PROCEDURE FOR MALFUNCTION A” first.
If the 1st trip DTC cannot be confirmed, perform “PROCE-
DURE FOR MALFUNCTION B AND C”.
NOTE: FE
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test. CL

MT
PROCEDURE FOR MALFUNCTION A NFEC0054S01
With CONSULT-II NFEC0054S0101
AT
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II. AX
3) Wait at least 6 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-578. SU
Without CONSULT-II NFEC0054S0102
1) Turn ignition switch “ON”, and wait at least 6 seconds. BR
SEF058Y 2) Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with ST
ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-578. RS

BT

HA

PROCEDURE FOR MALFUNCTION B AND C NFEC0054S02

SC
With CONSULT-II NFEC0054S0201
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
EL
3) Start engine and wait 5 seconds at most.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”, IDX
EC-578.
Without CONSULT-II NFEC0054S0202
1) Start engine and wait 5 seconds at most.
SEF058Y

EC-575
 DTC P0100 MASS AIR FLOW SENSOR
(MAFS) WITHOUT EURO-OBD
DTC Confirmation Procedure (Cont’d)
2) Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-578.

EC-576
DTC P0100 MASS AIR FLOW SENSOR
(MAFS) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0056

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

MEC835C RS

BT

HA

SC

EL
SEF650XB

IDX

EC-577
 DTC P0100 MASS AIR FLOW SENSOR
(MAFS) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure =NFEC0057

1 INSPECTION START
Which malfunction (A, B or C) is duplicated?

MTBL0399

Type I or Type II
Type I © GO TO 3.
Type II © GO TO 2.

2 CHECK INTAKE SYSTEM

Check the following for connection.
I Air duct
I Vacuum hoses
I Intake air passage between air duct to intake manifold collector
OK or NG
OK © GO TO 3.
NG © Reconnect the parts.

3 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 4.

EC-578
 DTC P0100 MASS AIR FLOW SENSOR
(MAFS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK MAFS POWER SUPPLY CIRCUIT

1. Disconnect mass air flow sensor (MAFS) harness connector. GI

MA

EM

LC

SEC139C
2. Turn ignition switch “ON”.
3. Check voltage between MAFS terminals 2, 4 and ground with CONSULT-II or tester.
FE

CL

MT

AT
SEF297X

OK or NG AX
OK © GO TO 6.
NG © GO TO 5. SU

5 DETECT MALFUNCTIONING PART

BR
Check the following.
I Harness for open or short between ECM relay and mass air flow sensor
I Harness for open or short between mass air flow sensor and ECM ST
© Repair harness or connectors.

RS
6 CHECK MAFS GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
BT
3. Check harness continuity between MAFS terminal 3 and ECM terminal 73.
Refer to Wiring Diagram.
Continuity should exist.
HA
4. Also check harness for short to ground and short to power.
OK or NG SC
OK © GO TO 7.
NG © Repair open circuit or short to ground or short to power in harness or connectors. EL

IDX

EC-579
 DTC P0100 MASS AIR FLOW SENSOR
(MAFS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK MAFS INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between MAFS terminal 1 and ECM terminal 61.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK MASS AIR FLOW SENSOR

1. Reconnect harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal 61 (Mass air flow sensor signal) and ground.

SEF298X
4. If the voltage is out of specification, disconnect MAFS harness connector and connect it again.
Then repeat above check.
OK or NG
OK © GO TO 9.
NG © Replace mass air flow sensor.

9 CHECK MAFS SHIELD CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect joint connector-18.
3. Check the following.
I Continuity between joint connector terminal 1 and ground
Refer to Wiring Diagram.
I Joint connector-18
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
4. Also check harness for short to power.
5. Then reconnect joint connector-18.
OK or NG
OK © GO TO 10.
NG © Repair open circuit or short to power in harness or connectors.

10 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-580
 DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITHOUT EURO-OBD
Component Description

Component Description NFEC0069

The engine coolant temperature sensor is used to detect the
engine coolant temperature. The sensor modifies a voltage signal GI
from the ECM. The modified signal returns to the ECM as the
engine coolant temperature input. The sensor uses a thermistor
which is sensitive to the change in temperature. The electrical MA
resistance of the thermistor decreases as temperature increases.
EM

SEF594K LC
<Reference data>
Engine coolant
Voltage* V Resistance kΩ
temperature °C (°F)

−10 (14) 4.4 7.0 - 11.4

FE
20 (68) 3.5 2.1 - 2.9

50 (122) 2.2 0.68 - 1.00

CL
90 (194) 0.9 0.236 - 0.260

SEF012P
*: These data are reference values and are measured between ECM terminal 70 MT
(Engine coolant temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/ AT
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground. AX

SU

BR

On Board Diagnosis Logic NFEC0070 ST

Malfunction is detected when an excessively high or low voltage
from the sensor is sent to ECM.
FAIL-SAFE MODE RS
NFEC0070S02
When this malfunction is detected, the ECM enters fail-safe mode
and the MIL lights up. BT
Detected items Engine operating condition in fail-safe mode

Engine coolant temperature will be determined by ECM based on the time after turning ignition switch HA
“ON” or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.

Engine coolant temperature decided (CONSULT-II SC

Condition
display)
Engine coolant tem-
perature sensor circuit Just as ignition switch is turned ON or Start 40°C (104°F) EL
More than approx. 4 minutes after ignition ON or
80°C (176°F)
Start
IDX
40 - 80°C (104 - 176°F)
Except as shown above
(Depends on the time)

EC-581
 DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITHOUT EURO-OBD
Possible Cause

Possible Cause NFEC0429

I Harness or connectors
(The sensor circuit is open or shorted.)
I Engine coolant temperature sensor

DTC Confirmation Procedure NFEC0071

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
WITH CONSULT-II NFEC0071S01
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Wait at least 5 seconds.
SEF058Y 4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-584.
WITHOUT CONSULT-II NFEC0071S02
1) Turn ignition switch “ON” and wait at least 5 seconds.
2) Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-584.

EC-582
DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0072

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC721C

EC-583
 DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0073

1 CHECK ECTS POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect engine coolant temperature sensor (ECTS) harness connector.

SEF259X
3. Turn ignition switch “ON”.
4. Check voltage between ECTS terminal 1 and ground with CONSULT-II or tester.

SEF585X

OK or NG
OK © GO TO 2.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

2 CHECK ECTS GROUND CIRCUIT FOR OPEN AND CIRCUIT

1. Turn ignition switch “OFF”.
2. Check harness continuity between ECTS terminal 2 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness for open or short between ECM and engine coolant temperature sensor
I Harness for open or short between TCM (Transmission Control Module) and engine coolant temperature sensor
© Repair open circuit or short to power in harness or connectors.

EC-584
 DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
(CIRCUIT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure. GI

MA

EM

LC

FE

CL

SEF304X MT
OK or NG
OK © GO TO 5. AT
NG © Replace engine coolant temperature sensor.

AX
5 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
SU
© INSPECTION END

BR

ST

RS

BT

HA

SC

EL

IDX

EC-585
 DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
Description

Description NFEC0074
COMPONENT DESCRIPTION NFEC0074S01
The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiom-
eter which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In
addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal
to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sen-
sor. This sensor controls engine operation such as fuel cut. On the other hand, the “Wide open and closed
throttle position switch”, which is built into the throttle position sensor unit, is not used for engine control.

AEC929

CONSULT-II Reference Value in Data Monitor

Mode NFEC0075
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Engine: After warming up, idle

Throttle valve: fully closed 0.15 - 0.85V
the engine
THRTL POS SEN I Engine: After warming up
I Ignition switch: ON Throttle valve: fully opened 3.5 - 4.7V
(Engine stopped)

I Engine: After warming up, idle

Throttle valve: fully closed 0.0%
the engine
ABSOL TH·P/S I Engine: After warming up
I Ignition switch: ON Throttle valve: fully opened Approx. 80%
(Engine stopped)

On Board Diagnosis Logic NFEC0077

Malfunction is detected when an excessively low or high voltage
from the sensor is sent to ECM.
FAIL-SAFE MODE NFEC0077S02
When the malfunction is detected, the ECM enters fail-safe mode
and the MIL lights up.

EC-586
 DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
On Board Diagnosis Logic (Cont’d)

Detected items Engine operating condition in fail-safe mode

Throttle position will be determined based on the injected fuel amount and the engine speed. GI
Therefore, acceleration will be poor.
Throttle position sensor Condition Driving condition
circuit MA
When engine is idling Normal

When accelerating Poor acceleration

EM

LC
Possible Cause NFEC0430
I Harness or connectors
(The throttle position sensor circuit is open or shorted.)
I Throttle position sensor
FE

CL

MT
DTC Confirmation Procedure NFEC0078
NOTE: AT
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test. AX
CAUTION:
Always drive vehicle at a safe speed. SU
TESTING CONDITION:
I Before performing the following procedure, confirm that
battery voltage is more than 10V at idle. BR
I This test may be conducted with the drive wheels lifted in
the shop or by driving the vehicle. If a road test is
expected to be easier, it is unnecessary to lift the vehicle. ST

RS

BT

HA

WITH CONSULT-II NFEC0078S01

SC
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2) Start engine and maintain the following conditions for at least EL
5 consecutive seconds.
Vehicle speed More than 5 km/h (3 MPH) IDX
Selector lever Suitable position except “P” or “N” position

3) If 1st trip DTC is detected, go to “Diagnostic Procedure”,

SEF065Y EC-590.

EC-587
 DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
DTC Confirmation Procedure (Cont’d)
WITHOUT CONSULT-II NFEC0078S04
1) Start engine and maintain the following conditions for at least
5 consecutive seconds.
Vehicle speed More than 5 km/h (3 MPH)

Selector lever Suitable position except “P” or “N” position

2) Turn ignition switch “OFF” and wait at least 10 seconds.

3) Turn ignition switch “ON” and perform “Diagnostic Test Mode
II (Self-diagnostic results)” with ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-590.

EC-588
DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0079

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC837C
HA

SC

EL

IDX

SEF652XB

EC-589
 DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0080

1 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 2.

2 CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT

1. Disconnect throttle position sensor harness connector.

SEC001C
2. Turn ignition switch “ON”.
3. Check voltage between throttle position sensor terminal 3 and ground with CONSULT-II or tester.

SEF306X

OK or NG
OK © GO TO 3.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-590
 DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Check harness continuity between sensor terminal 1 and engine ground.
Refer to Wiring Diagram.
Continuity should exist. MA
3. Also check harness for short to power.
OK or NG
OK © GO TO 5.
EM
NG © GO TO 4.
LC
4 DETECT MALFUNCTIONING PART
Check the following.
I Harness for open or short between ECM and throttle position sensor
I Harness for open or short between TCM (Transmission Control Module) and throttle position sensor
© Repair open circuit or short to power in harness or connectors.
FE

5 CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT CL
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 91 and throttle position sensor terminal 2. MT
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
AT
OK or NG
OK (With CONSULT-II) © GO TO 6.
AX
OK (Without CONSULT- © GO TO 7.
II)
NG © Repair open circuit or short to ground or short to power in harness or connectors. SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-591
 DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK THROTTLE POSITION SENSOR

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine (ignition switch OFF).
NOTE:
Steps 3 to 5 should be performed for only models with throttle opener. For models without throttle opener, skip steps 3
to 5 and go to the step 6.
3. Remove the vacuum hose connected to the throttle opener.
4. Connect suitable vacuum hose to the vacuum pump and the opener.
5. Apply vacuum [more than −40.0 kPa (−400 mbar, −300 mmHg, −11.81 inHg)] until the throttle drum becomes free from
the rod of the throttle opener.

SEF793W
6. Turn ignition switch ON.
7. Select “DATA MONITOR” mode with CONSULT-II.
8. Check voltage of “THRTL POS SEN” under the following conditions.
Voltage measurement must be made with throttle position sensor installed in vehicle.

SEF062Y

OK or NG
OK © GO TO 9.
NG © GO TO 8.

EC-592
 DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK THROTTLE POSITION SENSOR

Without CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Stop engine (ignition switch OFF).
NOTE: MA
Steps 3 to 5 should be performed for only models with throttle opener. For models without throttle opener, skip steps 3
to 5 and go to the step 6.
3. Remove the vacuum hose connected to the throttle opener.
4. Connect suitable vacuum hose to the vacuum pump and the opener.
EM
5. Apply vacuum [more than −40.0 kPa (−400 mbar, −300 mmHg, −11.81 inHg)] until the throttle drum becomes free from
the rod of the throttle opener.
LC

FE

CL

SEF793W
6. Turn ignition switch ON.
MT
7. Check voltage between ECM terminal 91 (Throttle position sensor signal) and ground.
Voltage measurement must be made with throttle position sensor installed in vehicle.
AT

AX

MTBL0231 SU
OK or NG
OK © GO TO 9. BR
NG © GO TO 8.
ST
8 ADJUST CLOSED THROTTLE POSITION SWITCH
Adjust closed throttle position switch. Refer to “Basic Inspection”, EC-514. RS

BT

HA

SC
MTBL0623

OK or NG EL
OK © GO TO 9.
NG © Replace throttle position sensor. To adjust it, perform “Basic Inspection”, EC-514. IDX

EC-593
 DTC P0120 THROTTLE POSITION
SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK THROTTLE POSTION SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect joint connector-18
3. Check the following
I Continuity between joint connector terminal 2 and ground
I Joint connector
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
I Also check harness for short to power.
I Then reconnect joint connector-18.
OK or NG
OK © GO TO 10.
NG © Repair open circuit or short to to power in harness or connectors.

10 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-594
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Component Description

Component Description NFEC0086

The heated oxygen sensor 1 (front) is placed into the front tube. It
detects the amount of oxygen in the exhaust gas compared to the GI
outside air. The heated oxygen sensor 1 (front) has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. MA
The heated oxygen sensor 1 (front) signal is sent to the ECM. The
ECM adjusts the injection pulse duration to achieve the ideal air-
fuel ratio. The ideal air-fuel ratio occurs near the radical change EM
from 1V to 0V.
SEF463R LC

FE

CL

SEF288D
MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0087
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
HO2S1 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S1 (B2) SU
Maintaining engine speed at 2,000
HO2S1 MNTR I Engine: After warming up LEAN +, RICH
(B1) rpm
Changes more than 5 times during BR
HO2S1 MNTR
10 seconds.
(B2)

ST

RS

BT

HA

On Board Diagnosis Logic NFEC0089

SC
Under the condition in which the heated oxygen sensor 1 (front)
signal is not input, the ECM circuits will read a continuous approxi-
mately 0.3V. Therefore, for this diagnosis, the time that output EL
voltage is within 200 to 400 mV range is monitored, and the diag-
nosis checks that this time is not inordinately long.
Malfunction is detected when the voltage from the sensor is con- IDX
stantly approx. 0.3V.

SEF237U

EC-595
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Possible Cause

Possible Cause NFEC0432

I Harness or connectors
(The sensor circuit is open or shorted.)
I Heated oxygen sensor 1 (front)

Overall Function Check NFEC0091

Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed.
WITH CONSULT-II NFEC0091S01
1) Start engine and warm it up to normal operating temperature.
2) Select “MANU TRIG” in “DATA MONITOR” mode with
CONSULT-II, and select “HO2S1 (B1)” and “HO2S1 (B2)”.
3) Hold engine speed at 2,000 rpm under no load.
SEF646Y 4) Make sure that the indications do not remain in the range
between 0.2 to 0.4V.
5) If NG, go to “Diagnostic Procedure”, EC-599.
WITHOUT CONSULT-II NFEC0091S02
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 63 (HO2S1 bank
1 signal) or 62 (HO2S1 bank 2 signal) and engine ground.
3) Check the following with engine speed held at 2,000 rpm con-
stant under no load.
I The voltage does not remain in the range of 0.2 - 0.4V.
4) If NG, go to “Diagnostic Procedure”, EC-599.
SEF308XA

EC-596
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0092

BANK 1 NFEC0092S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA
MEC290D

SC

EL

IDX

SEF854YC

EC-597
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0092S02

MEC291D

SEF855YC

EC-598
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0093

1 INSPECTION START GI
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
MA

EM

LC

SEF255X
3. Make sure HO2S1 (front) harness protector color, and disconnect corresponding heated oxygen sensor 1 (front) har- FE
ness connector.

CL

MT

AT

AX
SEF505YA

SU

BR

ST

RS
SEF902XA

© GO TO 2.
BT

HA

SC

EL

IDX

EC-599
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK HEATED OXYGEN SENSOR 1 (FRONT) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows.
Refer to Wiring Diagram.

MTBL0484
Continuity should exist.
3. Check harness continuity between ECM terminal or HO2S1 (front) terminal and ground as follows.
Refer to Wiring Diagram.

MTBL0485
Continuity should not exist.
4. Also check harness for short to power.
OK or NG
OK (With CONSULT-II) © GO TO 3.
OK (Without CONSULT- © GO TO 4.
II)
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-600
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”. MA
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.
EM

LC

FE
SEF646Y
6. Check the following.
I “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
CL
5 times (cycles) are counted as shown below.
MT

AT

AX

SU
SEF647YA
I “HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
I “HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once. BR
I “HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

ST

RS

BT

HA
SEF648Y
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a SC
hard surface such as a concrete floor; use a new one.
OK or NG EL
OK © GO TO 6.
NG © GO TO 5.
IDX

EC-601
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and set ECM in diagnostic test mode-II [Heated oxygen sensor 1 monitor (front)].
3. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 signal) or 62 (HO2S1 bank 2 signal) and engine
ground.
4. Check the following with engine speed held at 2,000 rpm constant under no load.

SEF967XA
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.

SEF505YA
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner and
approved anti-seize lubricant. Refer to “Commercial Service Tools”, EC-460.

© Replace malfunctioning heated oxygen sensor 1 (front).

EC-602
 DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1 (FRONT)
(CIRCUIT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HEATED OXYTEN SENSOR 1 (FRONT) SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Disconnect joint connector-17 or joint connector-18.
3. Check the following.
I Continuity between joint connector terminal 1 or 2 and ground MA
I Joint connector
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
4. Also check harness for short to power.
EM
5. Then reconnect joint connector-17 or joint connector-18.
OK or NG LC
OK © GO TO 7.
NG © Repair open circuit or short to power in harness or connectors.

7 CHECK INTERMITTENT INCIDENT FE

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END
CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-603
 DTC P0325 KNOCK SENSOR (KS) WITHOUT EURO-OBD
Component Description

Component Description NFEC0185

The knock sensor is attached to the cylinder block. It senses
engine knocking using a piezoelectric element. A knocking vibration
from the cylinder block is sensed as vibrational pressure. This
pressure is converted into a voltage signal and sent to the ECM.
Freeze frame data will not be stored in the ECM for the knock
sensor. The MIL will not light for knock sensor malfunction.
The knock sensor has one trip detection logic.

SEF332I

On Board Diagnosis Logic NFEC0187

Malfunction is detected when an excessively low or high voltage
from the knock sensor is sent to ECM.

Possible Cause NFEC0491

I Harness or connectors
(The knock sensor circuit is open or shorted.)
I Knock sensor

DTC Confirmation Procedure NFEC0188

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10V at idle.
WITH CONSULT-II NFEC0188S01

SEF058Y
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II
2) Start engine and run it for at least 5 seconds at idle speed.
3) If DTC is detected, go to “Diagnostic Procedure”, EC-606.
WITHOUT CONSULT-II NFEC0188S03
1) Start engine and run it for at least 5 seconds at idle speed.
2) Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If DTC is detected, go to “Diagnostic Procedure”, EC-606.

EC-604
DTC P0325 KNOCK SENSOR (KS) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0189

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC736C
HA

SC

EL

IDX

SEF663XB

EC-605
 DTC P0325 KNOCK SENSOR (KS) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0190

1 CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminal 93 and engine ground.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MΩ.

SEF321X
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 5.
NG © GO TO 2.

2 CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect knock sensor harness connector.
2. Check harness continuity between ECM terminal 93 and knock sensor terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connector F8, F131
I Harness for open or short between ECM and knock sensor
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-606
 DTC P0325 KNOCK SENSOR (KS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK KNOCK SENSOR

Check resistance between knock sensor terminal 1 and ground. GI
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MΩ.
MA

EM

LC

SEF322X
CAUTION:
Do not use any knock sensors that have been dropped or physically damaged. Use only new ones. FE
OK or NG
OK © GO TO 8. CL
NG © Replace knock sensor.
MT
5 RETIGHTEN GROUND SCREWS
Loose and retighten engine ground screws. AT

AX

SU

BR

SEF255X ST
© GO TO 6.

RS
6 CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Disconnect harness connectors F8, F131.
2. Check harness continuity between harness connector F8 terminal 2 and engine ground. Refer to Wiring Diagram.
BT
Continuity should exist.
3. Also check harness for short to power.
HA
OK or NG
OK © GO TO 8.
SC
NG © GO TO 7.

7 DETECT MALFUNCTIONING PART

EL
Check the following.
I Harness connectors F8, F131 IDX
I Joint connectors-18
I Harness for open or short between harness connector F8 and engine ground
© Repair open circuit or short to power in harness or connectors.

EC-607
 DTC P0325 KNOCK SENSOR (KS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-608
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITHOUT EURO-OBD
Component Description

Component Description NFEC0658

The crankshaft position sensor (POS) is located on the oil pan
facing the gear teeth (cogs) of the signal plate (flywheel). It detects GI
the crankshaft position signal (1° signal).
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the gear MA
teeth (cogs) will periodically change. Permeability near the sensor
also changes.
Due to the permeability change, the magnetic flux near the core is EM
changed. Therefore, the voltage signal generated in the coil is
changed.
SEF254P
The ECM receives the voltage signal and detects the crankshaft LC
position signal (1° signal).

FE

CL

MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0659
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
I Tachometer: Connect
Almost the same speed as the
CKPS·RPM (POS) I Run engine and compare tachometer indication with the CONSULT-II SU
CONSULT-II value.
value.

BR

On Board Diagnosis Logic NFEC0660 ST

Malfunction is detected when 1° signal is not entered to ECM for
the first few seconds during engine cranking, or 1° signal is not
entered to ECM during engine running. RS

BT

HA

Possible Cause NFEC0661

SC
I Harness or connectors
[The crankshaft position sensor (POS) circuit is open or
shorted.] EL
I Crankshaft position sensor (POS)
I Starter motor (Refer to EL section.) IDX
I Starting system circuit (Refer to EL section.)
I Dead (Weak) battery

EC-609
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITHOUT EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0662

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V.
WITH CONSULT-II NFEC0662S01

SEF058Y
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2) Crank engine for at least two seconds.
3) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-612.

WITH GST NFEC0662S02

Follow the procedure “With CONSULT-II” above.

EC-610
DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0663

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC850C

EC-611
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITHOUT EURO-OBD
Wiring Diagram (Cont’d)

SEF856Y

Diagnostic Procedure NFEC0664

1 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 2.

EC-612
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK CKPS (POS) POWER SUPPLY CIRCUIT

1. Disconnect harness connectors F25, F171. GI

MA

EM

LC

SEF511WB
2. Check voltage between harness connector F25 terminal 4 and ground with CONSULT-II or tester.

FE

CL

MT

SEF323X AT
3. Also check harness for short to ground and short to power.
OK or NG AX
OK © GO TO 4.
NG © GO TO 3.
SU
3 DETECT MALFUNCTIONING PART
BR
Check the following.
I Harness connectors F25, F171
I Harness connectors E15, F18 ST
I Harness for open or short between ECM and crankshaft position sensor (POS)
I Harness for open or short between ECM relay and crankshaft position sensor (POS)
© Repair open circuit or short to ground or short to power in harness or connectors. RS

4 CHECK CKPS (POS) GROUND CIRCUIT FOR OPEN AND SHORT BT

1. Check harness continuity between harness connector F25 terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power. HA
OK or NG
OK © GO TO 5. SC
NG © Repair open circuit or short to ground or short to power in harness or connectors.
EL

IDX

EC-613
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK CKPS (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 85 and harness connector F25 terminal 1.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK CKPS (POS) SUB-HARNESS CIRCUIT FOR OPEN AND SHORT

1. Disconnect CKPS (POS) harness connector.

SEF367Q
2. Check harness continuity between CKPS (POS) terminals and harness connector F171 terminals as follows.

MTBL0352
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 7.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

7 CHECK CKPS (POS) INSTALLATION

Check that CKPS (POS) and HO2S1 (front) (B2) harness clamp are installed correctly as shown below.

SEM222FB

OK or NG
OK © GO TO 8.
NG © Install CKPS (POS) correctly.

EC-614
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK CRANKSHAFT POSITION SENSOR (POS)-I

1. Disconnect crankshaft position sensor (POS) harness connector. GI
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping. MA

EM

LC

SEF587P FE
OK or NG
OK © GO TO 9. CL
NG © Replace crankshaft position sensor (POS).

MT
9 CHECK CRANKSHAFT POSITION SENSOR (POS)-II
1. Reconnect disconnected harness connectors.
2. Turn ignition switch “ON”. AT
3. Check voltage between ECM terminal 85 and ground by briefly touching the sensor core with a flat-bladed screwdriv-
ers.
AX

SU

BR

ST
SEF324X

OK or NG
RS
OK © GO TO 10.
NG © Replace crankshaft position sensor (POS).
BT

10 CHECK CKPS (POS) SHIELD CIRCUIT FOR OPEN AND SHORT HA

1. Disconnect harness connectors F25, F171.
2. Check harness continuity between harness connector F25 terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
SC
3. Also check harness for short to ground and short to power.
OK or NG EL
OK © GO TO 12.
NG © GO TO 11. IDX

EC-615
 DTC P0335 CRANKSHAFT POSITION SENSOR (CKPS)
(POS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

11 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F25, F171
I Joint connector-18
I Harness for open or short between harness connector F25 and engine ground
© Repair open circuit or short to ground or short to power in harness or connectors.

12 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-562.
© INSPECTION END

EC-616
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITHOUT EURO-OBD
Component Description

Component Description NFEC0197

The camshaft position sensor (PHASE) is located on the engine
front cover facing the camshaft sprocket. It detects the cylinder No. GI
signal.
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the MA
camshaft sprocket will periodically change. Permeability near the
sensor also changes.
Due to the permeability change, the magnetic flux near the core is EM
changed. Therefore, the voltage signal generated in the coil is
changed.
SEF252P
The ECM receives the voltage signal and detects the cylinder No. LC
signal.

FE

CL

MT
On Board Diagnosis Logic NFEC0199
Malfunction is detected when AT
(Malfunction A) the cylinder No. signal is not sent to ECM for the
first few seconds during engine cranking,
(Malfunction B) the cylinder No. signal is not sent to ECM during AX
engine running,
(Malfunction C) the cylinder No. signal is not in the normal pattern
during engine running. SU

BR

Possible Cause NFEC0494 ST

I Harness or connectors
[The camshaft position sensor (PHASE) circuit is open or
shorted.] RS
I Camshaft position sensor (PHASE)
I Starter motor (Refer to SC section.)
I Starting system circuit (Refer to SC section.) BT
I Dead (Weak) battery
HA

DTC Confirmation Procedure NFEC0200

SC
NOTE:
I Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st
trip DTC cannot be confirmed, perform “PROCEDURE EL
FOR MALFUNCTION B AND C”.
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
IDX
10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V at idle.

EC-617
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITHOUT EURO-OBD
DTC Confirmation Procedure (Cont’d)
PROCEDURE FOR MALFUNCTION A NFEC0200S01
With CONSULT-II NFEC0200S0101
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Crank engine for at least 2 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-620.
Without CONSULT-II NFEC0200S0102
1) Crank engine for at least 2 seconds.
SEF065Y 2) Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-620.

PROCEDURE FOR MALFUNCTION B AND C NFEC0200S02

With CONSULT-II NFEC0200S0201
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and run it for at least 2 seconds at idle speed.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-620.
Without CONSULT-II NFEC0200S0202
1) Start engine and run it for at least 2 seconds at idle speed.
SEF058Y 2) Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-612.

EC-618
DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0201

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC900C
HA

SC

EL

IDX

SEC136C

EC-619
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0202

1 CHECK STARTING SYSTEM

Turn ignition switch to “START” position.
Does the engine turn over?
Does the starter motor operate?
Yes or No
Yes © GO TO 2.
No © Check starting system. (Refer to SC-12, “STARTING SYSTEM”.)

2 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 3.

3 CHECK CMPS (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and CMPS (PHASE) harness connector.

SEF274P
3. Check harness continuity between CMPS (PHASE) terminal 2 and ECM terminals 65, 75 (Models without immobilizer)
or 66, 76 (Models with immobilizer). Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-620
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK CMPS (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between CMPS (PHASE) terminal 1 and engine ground. GI
Continuity should exist.
2. Also check harness for short to power.
OK or NG MA
OK © GO TO 5.
NG © Repair open circuit or short to power in harness or connector. EM

5 CHECK CAMSHAFT POSITION SENSOR (PHASE)-I LC

1. Loosen the fixing bolt of the camshaft position sensor (PHASE).
2. Remove the CMPS (PHASE).
3. Visually check the CMPS (PHASE) for chipping.

FE

CL

MT

SEF583P
AT
OK or NG
OK © GO TO 6. AX
NG © Replace camshaft position sensor (PHASE).
SU
6 CHECK CAMSHAFT POSITION SENSOR (PHASE)-II
Check resistance between CMPS (PHASE) terminals 1 and 2 as shown below. BR

ST

RS

BT

SEF325X
HA
OK or NG
OK © GO TO 7.
SC
NG © Replace camshaft position sensor (PHASE).

EL

IDX

EC-621
 DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)
(PHASE) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK CMPS (PHASE) SHIELD CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect joint connector-18.
3. Check the following.
I Continuity between joint connector terminal 1 and ground
I Joint connector
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
4. Also check harness for short to power.
5. Then reconnect joint connector-18.
OK or NG
OK © GO TO 8.
NG © Repair open circuit or short to power in harness or connectors.

8 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-622
 DTC P0605 ECM WITHOUT EURO-OBD
Component Description

Component Description NFEC0271

The ECM consists of a microcomputer and connector for signal
input and output and for power supply. The unit controls the engine. GI

MA

EM

SEC220B LC
On Board Diagnosis Logic NFEC0272
Malfunction is detected when ECM calculation function is
malfunctioning.

FE

CL

MT
Possible Cause NFEC0518
I ECM AT

AX

SU

BR

DTC Confirmation Procedure NFEC0273 ST

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds RS
before conducting the next test.

BT

HA

WITH CONSULT-II NFEC0273S01

SC
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine.
EL
4) Run engine for at least 30 seconds at idle speed.
5) If 1st trip DTC is detected, go to “Diagnostic Procedure”, IDX
EC-624.
WITHOUT CONSULT-II NFEC0273S02
1) Turn ignition switch “ON”.
SEF058Y 2) Start engine and wait at least 30 seconds.
EC-623
 DTC P0605 ECM WITHOUT EURO-OBD
DTC Confirmation Procedure (Cont’d)
3) Turn ignition switch “OFF” and wait at least 10 seconds.
4) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
5) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-624.

Diagnostic Procedure NFEC0274

1 INSPECTION START
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SELF DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4. Perform “DTC Confirmation Procedure”.
See EC-623.
5. Is the 1st trip DTC P0605 displayed again?
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory. Refer to “How to Erase DTC ( Without
CONSULT-II)”, EC-493.
3. Perform “DTC Confirmation Procedure”.
See EC-623.
4. Is the 1st trip DTC 0605 displayed again?
Yes or No
Yes [With NVIS (NATS) © GO TO 2.
system]
Yes [Without NVIS © GO TO 3.
(NATS) system]
No © INSPECTION END

2 REPLACE ECM
1. Turn ignition switch “OFF”.
2. Replace ECM.
3. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to “NVIS (NIS-
SAN VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-493.
4. Perform “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT © INSPECTION END
INCMP © Follow the construction of “Idle Air Volume Learning”.

EC-624
 DTC P0605 ECM WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 REPLACE ECM
1. Turn ignition switch “OFF”. GI
2. Replace ECM.
3. Perform “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP? MA
CMPLT or INCMP
CMPLT © INSPECTION END
EM
INCMP © Follow the construction of “Idle Air Volume Learning”.

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-625
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
System Description

System Description NFEC0554

COOLING FAN CONTROL NFEC0554S01

ECM func-
Sensor Input Signal to ECM Actuator
tion

Vehicle speed sensor Vehicle speed

Engine coolant temperature sensor Engine coolant temperature

Cooling fan
Air conditioner switch Air conditioner “ON” signal Cooling fan relay(s)
control
Ignition switch Start signal

Refrigerant pressure sensor Refrigerant pressure

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refriger-
ant pressure and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].
OPERATION NFEC0554S02
VQ20DE Engine Models NFEC0554S0203

SEF001Y

EC-626
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
System Description (Cont’d)
VQ30DE Engine Models NFEC0554S0204

GI

MA

EM

LC

FE

CL
SEF578XB

CONSULT-II Reference Value in Data Monitor MT

Mode NFEC0555
Specification data are reference values. AT
MONITOR ITEM CONDITION SPECIFICATION

Air conditioner switch: OFF OFF AX

I Engine: After warming up, idle
AIR COND SIG Air conditioner switch: ON
the engine ON
(Compressor operates) SU
Engine coolant temperature is
OFF
94°C (201°F) or less
BR
I After warming up engine, idle Engine coolant temperature is
COOLING FAN the engine. between 95°C (203°F) and 104°C LOW
I Air conditioner switch: OFF (219°F) ST
Engine coolant temperature is
HIGH
105°C (221°F) or more
RS
On Board Diagnosis Logic NFEC0557
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will BT
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated. HA
Malfunction is detected when cooling fan does not operate properly (Overheat), cooling fan system does not
operate properly (Overheat) and engine coolant was not added to the system using the proper filling method.
Possible Cause NFEC0563
SC
I Harness or connectors
(The cooling fan circuit is open or shorted.)
I Cooling fan
EL
I Radiator hose
I Radiator IDX
I Radiator cap
I Water pump
I Thermostat

EC-627
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Possible Cause (Cont’d)
For more information, refer to “MAIN 12 CAUSES OF
OVERHEATING”, EC-643.
CAUTION:
When a malfunction is indicated, be sure to replace the cool-
ant following the procedure in the MA-14, “Changing Engine
Coolant”. Also, replace the engine oil.
1) Fill radiator with coolant up to specified level with a fill-
ing speed of 2 liters per minute. Be sure to use coolant
with the proper mixture ratio. Refer to MA-12, “Anti-
freeze Coolant Mixture Ratio”.
2) After refilling coolant, run engine to ensure that no
water-flow noise is emitted.

Overall Function Check NFEC0558

Use this procedure to check the overall function of the cooling fan.
During this check, a DTC might not be confirmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could be caused by high pressure fluid escaping from
the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by
turning it a quarter turn to allow built-up pressure to escape.
Then turn the cap all the way off.
SEF621W
WITH CONSULT-II NFEC0558S01
1) Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to “Diagnos-
tic Procedure”, EC-632.
2) Confirm whether the customer filled the coolant or not. If the
customer filled the coolant, skip the following steps and go to
“Diagnostic Procedure”, EC-632.
3) Turn ignition switch “ON”.
4) Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SEF111X SULT-II.
5) If the results are NG, go to “Diagnostic Procedure”, EC-632.

EC-628
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Overall Function Check (Cont’d)
WITHOUT CONSULT-II NFEC0558S03
1) Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level. GI
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to “Diagnos-
tic Procedure”, EC-632. MA
2) Confirm whether the customer filled the coolant or not. If the
customer filled the coolant, skip the following steps and go to
“Diagnostic Procedure”, EC-632. EM
3) Start engine.
AEC640 Be careful not to overheat engine. LC
4) Set temperature control lever to full cold position.
5) Turn air conditioner switch “ON”.
6) Turn blower fan switch “ON”.
7) Run engine at idle for a few minutes with the air conditioner
operating.
Be careful not to overheat engine. FE
8) Make sure the cooling fans are operating at low speeds.
9) Turn ignition switch “OFF”. CL
10) Turn air conditioner switch and blower fan switch “OFF”.
11) Disconnect engine coolant temperature sensor harness con-
SEC163BA nector. MT
12) Connect 150Ω resistor to engine coolant temperature sensor
harness connector.
AT
13) Restart engine and make sure the cooling fans are operating
at high speed.
Be careful not to overheat engine. AX
14) If NG, go to “Diagnostic Procedure”, EC-632.

SU

BR
MEC475B

ST

RS

BT

HA

SC

EL

IDX

EC-629
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0559

MEC848C

EC-630
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Wiring Diagram (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MEC849C

HA

SC

EL

IDX
SEF630XB

EC-631
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0560

1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes © GO TO 2.
No © GO TO 4.

2 CHECK COOLING FAN LOW SPEED OPERATION

With CONSULT-II
1. Disconnect cooling fan relays-2 and -3.

SEC006C
2. Turn ignition switch “ON”.
3. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-II.

SEF646X
4. Make sure that cooling fans-1 and -2 operate at low speed.
OK or NG
OK © GO TO 3.
NG © Check cooling fan low speed control circuit. (Go to PROCEDURE A, EC-638.)

EC-632
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK COOLING FAN HIGH SPEED OPERATION

With CONSULT-II GI
1. Turn ignition switch “OFF”.
2. Reconnect cooling fan relays-2 and -3.
3. Turn ignition switch “ON”. MA
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-II.

EM

LC

FE
SEF111X
5. Make sure that cooling fans-1 and -2 operate at high speed.
OK or NG CL
OK © GO TO 6.
NG © Check cooling fan high speed control circuit. (Go to PROCEDURE B, EC-641.) MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-633
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK COOLING FAN LOW SPEED OPERATION

Without CONSULT-II
1. Disconnect cooling fan relays-2 and -3.

SEC006C
2. Start engine and let it idle.
3. Set temperature lever at full cold position.
4. Turn air conditioner switch “ON”.
5. Turn blower fan switch “ON”.
6. Make sure that cooling fans-1 and -2 operate at low speed.

SEC163BA

OK or NG
OK © GO TO 5.
NG © Check cooling fan low speed control circuit. (Go to PROCEDURE A, EC-638.)

EC-634
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK COOLING FAN HIGH SPEED OPERATION

Without CONSULT-II GI
1. Turn ignition switch “OFF”.
2. Reconnect cooling fan relays-2 and -3.
3. Turn air conditioner switch and blower fan switch “OFF”. MA
4. Disconnect engine coolant temperature sensor harness connector.
5. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
6. Restart engine and make sure that cooling fans-1 and -2 operate at high speed.
EM

LC

FE

MEC475B CL
OK or NG
OK © GO TO 6. MT
NG © Check cooling fan high speed control circuit. (Go to PROCEDURE B, EC-641.)

AT
6 CHECK COOLING SYSTEM FOR LEAK
Apply pressure to the cooling system with a tester, and check if the pressure drops.
Testing pressure: 157 kPa (1.57 bar, 1.6 kg/cm2, 23 psi) AX
CAUTION:
Higher than the specified pressure may cause radiator damage.
SU

BR

ST

RS
SLC754A
Pressure should not drop. BT
OK or NG
OK © GO TO 8. HA
NG © GO TO 7.

SC
7 DETECT MALFUNCTIONING PART
Check the following for leak.
I Hose EL
I Radiator
I Water pump (Refer to LC-12, “Water Pump”.)
IDX
© Repair or replace.

EC-635
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK RADIATOR CAP

Apply pressure to cap with a tester and check radiator cap relief pressure.

SLC755A
Radiator cap relief pressure:
59 - 98 kPa (0.59 - 0.98 bar, 0.6 - 1.0 kg/cm2, 9 - 14 psi)
OK or NG
OK © GO TO 9.
NG © Replace radiator cap.

9 CHECK THERMOSTAT
1. Remove thermostat.
2. Check valve seating condition at normal room temperatures.
It should seat tightly.
3. Check valve opening temperature and valve lift.

SLC343
Valve opening temperature:
82°C (180°F) [standard]
Valve lift:
More than 8.6 mm/95°C (0.339 in/203°F)
4. Check if valve is closed at 5°C (9°F) below valve opening temperature. For details, refer to LC-16, “Thermostat”.
OK or NG
OK © GO TO 10.
NG © Replace thermostat.

EC-636
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

10 CHECK ENGINE COOLANT TEMPERATURE SENSOR

1. Remove engine coolant temperature sensor. GI
2. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.

MA

EM

LC

FE

CL

MT
SEF304X

OK or NG
AT
OK © GO TO 11.
NG © Replace engine coolant temperature sensor.
AX
11 CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to “MAIN 12 CAUSES OF OVERHEATING”, EC-643. SU
© INSPECTION END
BR

ST

RS

BT

HA

SC

EL

IDX

EC-637
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)
PROCEDURE A =NFEC0560S01

1 CHECK COOLING FAN POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect cooling fan relay-1.
3. Turn ignition switch “ON”.
4. Check voltage between cooling fan relay-1 terminals 1, 3, 6 and ground with CONSULT-II or tester.

SEF590X

OK or NG
OK © GO TO 3.
NG © GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
I 15A fuse
I 40A fusible links
I Harness for open or short between cooling fan relay-1 and fuse
I Harness for open or short between cooling fan relay-1 and battery
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-638
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”. GI
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector.

MA

EM

LC

SEC007C
3. Check harness continuity between cooling fan relay-1 terminal 5 and cooling fan motor-1 terminal 2, cooling fan
motor-1 terminal 3 and body ground. Refer to Wiring Diagram. FE
Continuity should exist.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between cooling fan relay-1 terminal 7 and cooling fan motor-2 terminal 2, cooling fan
motor-2 terminal 3 and body ground. Refer to Wiring Diagram.
CL
Continuity should exist.
6. Also check harness for short to ground and short to power.
MT
OK or NG
OK © GO TO 4.
AT
NG © Repair open circuit or short to ground or short to power in harness or connectors.

AX
4 CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 35 and cooling fan relay-1 terminal 2. Refer to Wiring Diagram. SU
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
BR
OK © GO TO 6.
NG © GO TO 5. ST

5 DETECT MALFUNCTIONING PART RS

Check the following.
I Harness connectors E8, F17
I Harness for open or short between cooling fan relay-1 and ECM
BT
© Repair open circuit or short to ground or short to power in harness or connectors.
HA

SC

EL

IDX

EC-639
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK COOLING FAN RELAY-1

Check continuity between cooling fan relay-1 terminals 3 and 5, 6 and 7 under the following conditions.

SEF591X

OK or NG
OK © GO TO 7.
NG © Replace cooling fan relay.

7 CHECK COOLING FAN MOTORS-1 AND -2

Supply battery voltage between the following terminals and check operation.

SEF592X

OK or NG
OK © GO TO 8.
NG © Replace cooling fan motors.

8 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-640
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)
PROCEDURE B NFEC0560S02

1 CHECK COOLING FAN POWER SUPPLY CIRCUIT GI

1. Turn ignition switch “OFF”.
2. Disconnect cooling fan relays-2 and -3.
3. Turn ignition switch “ON”. MA
4. Check voltage between cooling fan relays-2 and -3 terminals 1, 3 and ground with CONSULT-II or tester.

EM

LC

FE
SEF593X

OK or NG
CL
OK © GO TO 3.
NG © GO TO 2.
MT
2 DETECT MALFUNCTIONING PART
Check the following. AT
I Harness for open or short between cooling fan relays-2 and -3 and fuse
I Harness for open or short between cooling fan relays-2 and -3 and fusible link
© Repair harness or connectors.
AX

3 CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT SU

1. Turn ignition switch “OFF”.
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector. BR
3. Check harness continuity between cooling fan relay-2 terminal 5 and cooling fan motor-1 terminal 1, cooling fan relay-2
terminal 7 and cooling fan motor-1 terminal 4, cooling fan relay-2 terminal 6 and body ground. Refer to Wiring Diagram.
Continuity should exist. ST
4. Also check harness for short to ground and short to power.
5. Check harness continuity between cooling fan relay-3 terminal 5 and cooling fan motor-2 terminal 1, cooling fan relay-3
terminal 7 and cooling fan motor-2 terminal 4, cooling fan relay-3 terminal 6 and body ground. Refer to Wiring Diagram.
Continuity should exist.
RS
6. Also check harness for short to ground and short to power.
OK or NG BT
OK © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors. HA

4 CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT SC
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 34 and cooling fan relay-2 terminal 2, cooling fan relay-3 terminal 2.
Refer to Wiring Diagram. EL
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
IDX
OK © GO TO 6.
NG © GO TO 5.

EC-641
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E8, E17
I Harness for open or short between cooling fan relays-2 and -3 and ECM
© Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK COOLING FAN RELAYS-2 AND -3

Check continuity between cooling fan relay-2, -3 terminals 3 and 5, 6 and 7 under the following conditions.

SEF591X

OK or NG
OK © GO TO 7.
NG © Replace cooling fan relays.

7 CHECK COOLING FAN MOTORS

Supply battery voltage between the following terminals and check operation.

SEF592X

OK or NG
OK © GO TO 8.
NG © Replace cooling fan motors.

8 CHECK INTERMITTENT INCIDENT

1. Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-642
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) WITHOUT EURO-OBD
Main 12 Causes of Overheating

Main 12 Causes of Overheating NFEC0561

Engine Step Inspection item Equipment Standard Reference page GI

OFF 1 I Blocked radiator I Visual No blocking —
I Blocked condenser
I Blocked radiator grille MA
I Blocked bumper

2 I Coolant mixture I Coolant tester 50 - 50% coolant mixture See MA-11, “RECOM- EM
MENDED FLUIDS AND
LUBRICANTS”.

3 I Coolant level I Visual Coolant up to MAX level See MA-14, “Changing LC

in reservoir tank and Engine Coolant”.
radiator filler neck

4 I Radiator cap I Pressure tester 59 - 98 kPa See LC-11, “System

(0.59 - 1.0 bar, 0.6 - 1.0 Check”.
kg/cm2, 9 - 14 psi) (Limit)
FE
ON*2 5 I Coolant leaks I Visual No leaks See LC-11, “System
Check”.
CL
ON*2 6 I Thermostat I Touch the upper and Both hoses should be See LC-16, “Thermostat”
lower radiator hoses hot and LC-18, “Radiator”.

ON*1 7 I Cooling fan I CONSULT-II Operating See trouble diagnosis for MT

DTC P1217 (EC-626).

OFF 8 I Combustion gas leak I Color checker chemi- Negative — AT

cal tester 4 Gas ana-
lyzer

ON*3 9 I Coolant temperature I Visual Gauge less than 3/4 — AX

gauge when driving

I Coolant overflow to I Visual No overflow during driv- See MA-14, “Changing

reservoir tank ing and idling Engine Coolant”.
SU
OFF*4 10 I Coolant return from I Visual Should be initial level in See MA-13, “ENGINE
reservoir tank to radia- reservoir tank MAINTENANCE”. BR
tor

OFF 11 I Cylinder head I Straight gauge feeler 0.1 mm (0.004 in) Maxi- See EM-42, “Inspection”.
gauge mum distortion (warping)
ST
12 I Cylinder block and pis- I Visual No scuffing on cylinder See EM-62, “Inspection”.
tons walls or piston RS
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes. BT
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to LC-23, “OVERHEATING CAUSE ANALYSIS”. HA

SC

EL

IDX

EC-643
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITHOUT EURO-OBD
Component Description

Component Description NFEC0573

The crankshaft position sensor (REF) is located on the oil pan
(upper) facing the crankshaft pulley. It detects the TDC (Top Dead
Center) signal (120° signal).
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the
crankshaft pulley will periodically change. Permeability near the
sensor also changes.
Due to the permeability change, the magnetic flux near the core is
changed. Therefore, the voltage signal generated in the coil is
SEF253P
changed.
The ECM receives the voltage signal and detects the TDC signal
(120° signal).

CONSULT-II Reference Value in Data Monitor

Mode NFEC0574
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

CKPS·RPM (POS) I Tachometer: Connect

Almost the same speed as the
I Run engine and compare tachometer indication with the CONSULT-II
CONSULT-II value.
ENG SPEED value.

On Board Diagnosis Logic NFEC0576

Malfunction is detected when
(Malfunction A) 120° signal is not entered to ECM for the first few
seconds during engine cranking,
(Malfunction B) 120° signal is not entered to ECM during engine
running,
(Malfunction C) 120° signal cycle excessively changes during
engine running.
FAIL-SAFE MODE NFEC0576S01
When the ECM enters the fail-safe mode, the MIL illuminates.
Detected items Engine operating condition in fail-safe mode

Crankshaft position sensor (REF) Compression TDC signal (120° signal) is controlled by camshaft position sensor (PHASE)
circuit signal and crankshaft position sensor (POS) signal. Ignition timing will be delayed 0° to 2°.

EC-644
DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITHOUT EURO-OBD
Possible Cause

Possible Cause NFEC0577

I Harness or connectors
(The crankshaft position sensor (REF) circuit is open or GI
shorted.)
I Crankshaft position sensor (REF)
MA
I Starter motor (Refer to SC section.)
I Starting system circuit (Refer to SC section.)
I Dead (Weak) battery EM

LC
DTC Confirmation Procedure NFEC0578
NOTE:
I Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st
trip DTC cannot be confirmed, perform “PROCEDURE
FOR MALFUNCTION B AND C”. FE
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test. CL
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V at idle. MT
PROCEDURE FOR MALFUNCTION A NFEC0578S01
With CONSULT-II NFEC0578S0101
AT
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II. AX
3) Crank engine for at least 2 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-648. SU
Without CONSULT-II NFEC0578S0102
1) Crank engine for at least 2 seconds. BR
SEF065Y 2) Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with ST
ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-648. RS

BT

HA

PROCEDURE FOR MALFUNCTION B AND C NFEC0578S02

SC
With CONSULT-II NFEC0578S0201
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
EL
3) Start engine and run it for at least 2 seconds at idle speed.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”, IDX
EC-648.
Without CONSULT-II NFEC0578S0202
1) Start engine and run it for at least 2 seconds at idle speed.
SEF058Y

EC-645
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITHOUT EURO-OBD
DTC Confirmation Procedure (Cont’d)
2) Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.
3) Perform “Diagnostic Test Mode II” (Self-diagnostic results) with
ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-648.

EC-646
DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0579

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC905C
HA

SC

EL

IDX

SEC137C

EC-647
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure =NFEC0580

1 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 2.

2 CHECK CKPS (REF) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect CKPS (REF) harness connector.

SEF591PA
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 65, 75 (Models with immobilizer) or 66, 76 (Models without immobi-
lizer) and CKPS (REF) terminal 2. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F43, F191
I Harness for open or short between crankshaft position sensor (REF) and ECM
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-648
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK CKPS (REF) GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”. GI
2. Check harness continuity between CKPS (REF) terminal 1 and engine ground.
Continuity should exist.
3. Also check harness for short to power. MA
OK or NG
OK © GO TO 6.
EM
NG © GO TO 5.

LC
5 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors F43, F191
I Harness for open or short between crankshaft position sensor (REF) and engine ground
© Repair open circuit or short to power in harness or connector.
FE
6 CHECK CKPS (REF)-I
CL
1. Loosen the fixing bolts and remove the CKPS (REF).
2. Visually check the CKPS (REF) for chipping.
MT

AT

AX

SU
SEF585P

OK or NG BR
OK © GO TO 7.
NG © Replace crankshaft position sensor (REF). ST

7 CHECK CKPS (REF)-II RS

Check resistance between CKPS (REF) terminals 1 and 2.
BT

HA

SC

EL
SEF350X

OK or NG IDX
OK © GO TO 8.
NG © Replace crankshaft position sensor (REF).

EC-649
 DTC P1335 CRANKSHAFT POSITION SENSOR (CKPS)
(REF) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK CKPS (REF) SHIELD CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect harness connectors F43, F191.
3. Check harness continuity between harness connector F43 terminal 4 and engine ground.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK © GO TO 10.
NG © GO TO 9.

9 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F43, F191
I Joint connector-18
I Harness for open or short between harness connector F43 and engine ground
© Repair open circuit or short to power in harness or connectors.

10 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-650
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITHOUT EURO-OBD
Component Description

Component Description NFEC0292

The crankshaft position sensor (POS) is located on the oil pan
facing the gear teeth (cogs) of the signal plate (flywheel). It detects GI
the crankshaft position signal (1° signal).
The sensor consists of a permanent magnet, core and coil.
When engine is running, the gap between the sensor and the gear MA
teeth (cogs) will periodically change. Permeability near the sensor
also changes.
Due to the permeability change, the magnetic flux near the core is EM
changed. Therefore, the voltage signal generated in the coil is
changed.
SEF254P
The ECM receives the voltage signal and detects the crankshaft LC
position signal (1° signal).

FE

CL

MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0581
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
CKPS·RPM (POS) I Tachometer: Connect
Almost the same speed as the
I Run engine and compare tachometer indication with the CONSULT-II SU
CONSULT-II value.
ENG SPEED value.

BR

On Board Diagnosis Logic NFEC0294 ST

Malfunction is detected when chipping of the signal plate (flywheel
or drive plate) gear tooth (cog) is detected by the ECM.
RS

BT

HA

Possible Cause NFEC0582

SC
I Harness or connectors
I Crankshaft position sensor (POS)
EL
I Signal plate (Drive plate/Flywheel)

IDX

EC-651
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITHOUT EURO-OBD
DTC Confirmation Procedure

DTC Confirmation Procedure NFEC0295

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V.

WITH CONSULT-II NFEC0295S01

1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2) Start engine and run it for at least 70 seconds at idle speed.
3) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-654.
WITHOUT CONSULT-II NFEC0295S02
1) Start engine and run it for at least 70 seconds at idle speed.
2) Turn ignition switch “OFF”, wait at least 10 seconds and then
SEF058Y turn “ON”.
3) Perform “Diagnostic Test Mode II (Self-diagnostic results)” with
ECM.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-654.

EC-652
DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0296

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC850C

EC-653
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITHOUT EURO-OBD
Wiring Diagram (Cont’d)

SEF856Y

Diagnostic Procedure NFEC0297

1 RETIGHTEN GROUND SCERWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 2.

EC-654
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK CKPS (POS) POWER SUPPLY CIRCUIT

1. Disconnect harness connectors F25, F171. GI

MA

EM

LC

SEF511WB
2. Check voltage between harness connector F25 terminal 4 and ground with CONSULT-II or tester.

FE

CL

MT

SEF323X AT
3. Also check harness for short to ground and short to power.
OK or NG AX
OK © GO TO 4.
NG © GO TO 3.
SU
3 DETECT MALFUNCTIONING PART
BR
Check the following.
I Harness connectors F25, F171
I Harness connectors E15, F18 ST
I Harness for open or short between ECM and crankshaft position sensor (POS)
I Harness for open or short between ECM relay and crankshaft position sensor (POS)
© Repair open circuit or short to ground or short to power in harness or connectors. RS

4 CHECK CKPS (POS) GROUND CIRCUIT FOR OPEN AND SHORT BT

1. Check harness continuity between harness connector F25 terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power. HA
OK or NG
OK © GO TO 5. SC
NG © Repair open circuit or short to power in harness or connectors.
EL

IDX

EC-655
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK CKPS (POS) INPUT SIGNAL CIRCUIT

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 85 and harness connector F25 terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK CKPS (POS) SUB-HARNESS CIRCUIT FOR OPEN AND SHORT

1. Disconnect CKPS (POS) harness connector.

SEF367Q
2. Check harness continuity between CKPS (POS) terminals and harness connector F171 terminals as follows.

MTBL0352
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 7.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

7 CHECK CKPS (POS) INSTALLATION

Check that CKPS (POS) and HO2S1 bank 2 harness clamp are installed correctly as shown below.

SEM222FE

OK or NG
OK © GO TO 8.
NG © Install CKPS (POS) correctly.

EC-656
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK IMPROPER INSTALLATION

1. Loosen and retighten the fixing bolt of the crankshaft position sensor (POS). GI
2. Reconnect harness connectors disconnected.
3. Perform “DTC Confirmation Procedure”, EC-652 again.
Is a 1st trip DTC P1336 detected? MA
Yes © GO TO 9.
No © INSPECTION END EM

9 CHECK CRANKSHAFT POSITION SENSOR (POS) LC

1. Disconnect crankshaft position sensor (POS) harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.

FE

CL

MT

AT
SEF587P

OK or NG AX
OK © GO TO 10.
NG © Replace crankshaft position sensor (POS). SU

10 CHECK CRANKSHAFT POSITION SENSOR (POS)-II

BR
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminal 85 and ground by briefly touching the sensor core with a flat-bladed screwdriver. ST

RS

BT

HA

SEF324X
SC
OK or NG
OK © GO TO 11.
EL
NG © Replace crankshaft position sensor (POS).

IDX

EC-657
 DTC P1336 CRANKSHAFT POSITION SENSOR (CKPS) (POS)
(COG) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

11 CHECK CKPS (POS) SHIELD CIRCUIT FOR OPEN AND SHORT

1. Disconnect harness connectors F25, F171.
2. Check harness continuity between harness connector F25 terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 13.
NG © GO TO 12.

12 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F25, F171
I Joint connector-18
I Harness for open or short between harness connector F25 and engine ground
© Repair open circuit or short to power in harness or connectors.

13 CHECK GEAR TOOTH

Visually check for chipping signal plate (flywheel or drive plate) gear tooth (cog).
OK or NG
OK © GO TO 14.
NG © Replace the signal plate (flywheel or drive plate).

14 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-658
ABSOLUTE PRESSURE SENSOR WITHOUT EURO-OBD
Component Description

Component Description NFEC0644

The absolute pressure sensor detects ambient barometric pressure
and sends the voltage signal to the ECM. As the pressure GI
increases, the voltage rises.
MA

EM

SEF052V LC

FE

CL

SEF946SA
MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-659
 ABSOLUTE PRESSURE SENSOR WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0648

MEC049D

SEF651XB

EC-660
 ABSOLUTE PRESSURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0647

1 CHECK OVERALL FUNCTION GI

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 80 and ground with CONSULT-II or tester.
MA

EM

LC

SEF055Y

OK or NG
FE
OK © INSPECTION END
NG © GO TO 2. CL

2 RETIGHTEN GROUND SCREWS MT

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
AT

AX

SU

BR

SEF255X
ST
© GO TO 3.
RS

BT

HA

SC

EL

IDX

EC-661
 ABSOLUTE PRESSURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK ABSOLUTE PRESSURE SENSOR CONNECTOR FOR WATER

1. Disconnect absolute pressure sensor harness connector.

SEF257X
2. Check sensor harness connector for water.
Water should not exist.
OK or NG
OK © GO TO 4.
NG © Repair or replace harness connector.

4 CHECK ABSOLUTE PRESSURE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch “ON”.
2. Check voltage between absolute pressure sensor terminal 1 and ground with CONSULT-II or tester.

SEF299X

OK or NG
OK © GO TO 5.
NG © Repair harness or connectors.

5 CHECK ABSOLUTE PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between absolute pressure sensor terminal 3 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 7.
NG © GO TO 6.

EC-662
 ABSOLUTE PRESSURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness for open or short between ECM and absolute pressure sensor
I Harness for open or short between TCM (Transmission Control Module) and absolute pressure sensor
© Repair open circuit or short to power in harness or connectors. MA

7 CHECK ABSOLUTE PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT EM
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 80 and absolute pressure sensor terminal 2.
Continuity should exist. LC
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © Repair open circuit or short to ground or short to power in harness or connectors.
FE
8 CHECK ABSOLUTE PRESSURE SENSOR
CL
1. Remove absolute pressure sensor with its harness connector connected.
2. Remove hose from absolute pressure sensor.
3. Install a vacuum pump to absolute pressure sensor. MT
4. Turn ignition switch “ON” and check output voltage between ECM terminal 80 and engine ground under the following
conditions.
AT

AX

SU

BR
SEF300X
CAUTION:
I Always calibrate the vacuum pump gauge when using it. ST
I Do not apply below −93.3 kPa (–700 mmHg, –27.56 inHg) or over 101.3 kPa (760 mmHg, 29.92 inHg) of pressure.
OK or NG RS
OK © GO TO 9.
NG © Replace absolute pressure sensor. BT

HA

SC

EL

IDX

EC-663
 ABSOLUTE PRESSURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK ABSOLUTE PRESSURE SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect joint connector-18.
3. Check the following.
I Continuity between joint connector terminal 2 and ground
Refer to Wiring Diagram.
I Joint connector
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
4. Also check harness for short to power.
5. Then reconnect joint connector-18.
OK or NG
OK © GO TO 10.
NG © Repair open circuit or short to power in harness or connectors.

10 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-664
INTAKE AIR TEMPERATURE SENSOR WITHOUT EURO-OBD
Component Description

Component Description NFEC0064

The intake air temperature sensor is mounted to the air duct hous-
ing. The sensor detects intake air temperature and transmits a sig- GI
nal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive
to the change in temperature. Electrical resistance of the thermistor MA
decreases in response to the temperature rise.
<Reference data> EM
Intake air
Voltage* V Resistance kΩ
temperature °C (°F)
SEF258X LC
20 (68) 3.5 2.1 - 2.9

80 (176) 1.23 0.27 - 0.38

*: These data are reference values and are measured between ECM terminal 64
(Intake air temperature sensor) and ground.
CAUTION: FE
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as CL
the ground.

SEF012P
MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-665
 INTAKE AIR TEMPERATURE SENSOR WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0067

MEC427D

EC-666
 INTAKE AIR TEMPERATURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0068

1 CHECK OVERALL FUNCTION GI

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 64 and ground with CONSULT-II or tester.
MA

EM

LC

SEF004Y

OK or NG
FE
OK © INSPECTION END
NG © GO TO 2. CL

2 CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT MT

1. Turn ignition switch “OFF”.
2. Disconnect intake air temperature sensor harness connector.
AT

AX

SU

BR

SEF258X
3. Turn ignition switch “ON”. ST
4. Check voltage between terminal 1 and ground.

RS

BT

HA

SC
SEF301X

OK or NG EL
OK © GO TO 4.
NG © GO TO 3.
IDX

EC-667
 INTAKE AIR TEMPERATURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E8, F17
I Harness for open or short between ECM and intake air temperature sensor
© Repair harness or connectors.

4 CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between sensor terminal 2 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E8, F17
I Harness for open or short between ECM and intake air temperature sensor
I Harness for open or short between TCM (Transmission Control Module) and intake air temperature sensor
© Repair open circuit or short to power in harness or connectors.

6 CHECK INTAKE AIR TEMPERATURE SENSOR

Check resistance between intake air temperature sensor terminals 1 and 2 as shown in the figure.

SEF302X

OK or NG
OK © GO TO 7.
NG © Replace intake air temperature sensor.

EC-668
 INTAKE AIR TEMPERATURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566. GI
© INSPECTION END

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-669
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Component Description

Component Description NFEC0108

The heated oxygen sensor 1 (front) is placed into the front tube. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 (front) has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions.
The heated oxygen sensor 1 (front) signal is sent to the ECM. The
ECM adjusts the injection pulse duration to achieve the ideal air-
fuel ratio. The ideal air-fuel ratio occurs near the radical change
from 1V to 0V.
SEF463R

SEF288D

CONSULT-II Reference Value in Data Monitor

Mode NFEC0109
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

HO2S1 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S1 (B2)
Maintaining engine speed at 2,000
HO2S1 MNTR I Engine: After warming up LEAN +, RICH
(B1) rpm
Changes more than 5 times during
HO2S1 MNTR
10 seconds.
(B2)

EC-670
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0114

BANK 1 NFEC0114S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA
MEC292D

SC

EL

IDX

SEF854YC

EC-671
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0114S02

MEC293D

SEF855YC

EC-672
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0115

1 INSPECTION START GI
Do you have CONSULT-II?
Yes or No MA
Yes © GO TO 2.
No © GO TO 3.
EM
2 CHECK OVERALL FUNCTION
LC
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “HO2S1 MNTR (B1)” and “HO2S1 MNTR (B2)” in “DATA MONITOR” mode with CONSULT-II.
3. Keep the engine speed at 2,000 rpm under no load, and make sure that the monitors fluctuate between LEAN and
RICH more than five times in 10 seconds.
FE

CL

MT

AT
SEF155Z

OK or NG AX
OK © INSPECTION END
NG © GO TO 4. SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-673
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK OVERALL FUNCTION

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 10 seconds.
3. Set ECM in “Diagnostic test mode - II [Heated oxygen sensor 1 (front) monitor]”. Refer to “How to Switch Diagnostic
Test Modes”, EC-496.
4. Keep the engine speed at 2,000 rpm under no load, and make sure that the MIL comes ON more than five times in 10
seconds.

SAT652J
5. Switch the monitored sensor. Refer to “How to Switch Monitored Sensor from Bank 1 to Bank 2 or Vice Versa”,
EC-498.
6. Perform step 4 again.
OK or NG
OK © INSPECTION END
NG © GO TO 4.

4 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF255X

© GO TO 5.

5 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)

Loosen and retighten corresponding heated oxygen sensor 1 (front).
Tightening torque:
40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)

© GO TO 6.

EC-674
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK HO2S1 (FRONT) HARNESS PROTECTOR COLOR

1. Turn ignition switch “OFF”. GI
2. Check heated oxygen sensor 1 (front) harness protector.

MA

EM

LC

SEF505YA
3. Disconnect corresponding heated oxygen sensor 1 (front) harness connector.
FE

CL

MT

AT
SEF902XA

AX
© GO TO 7.

SU
7 CHECK HEATED OXYGEN SENSOR 1 (FRONT) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows. BR
Refer to Wiring Diagram.

ST

RS
MTBL0511
Continuity should exist.
3. Check harness continuity between ECM terminal or HO2S1 (front) terminal and ground as follows. BT
Refer to Wiring Diagram.

HA

SC
MTBL0512
Continuity should not exist. EL
4. Also check harness for short to power.
OK or NG
OK © GO TO 8.
IDX
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-675
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT)

Check resistance between front HO2S1 (front) terminals as follows.

SEF310X
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK (With CONSULT-II) © GO TO 9.
OK (Without CONSULT- © GO TO 10.
II)
NG © GO TO 11.

EC-676
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

With CONSULT-II GI
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”. MA
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.
EM

LC

FE
SEF646Y
6. Check the following.
I “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
CL
5 times (cycles) are counted as shown below.
MT

AT

AX

SU
SEF647YA
I “HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
I “HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once. BR
I “HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

ST

RS

BT

HA
SEF648Y
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a SC
hard surface such as a concrete floor; use a new one.
OK or NG EL
OK © GO TO 12.
NG © GO TO 11.
IDX

EC-677
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

10 CHECK HEATED OXYGEN SENSOR 1 (FRONT)

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and set ECM in diagnostic test mode-II [Heated oxygen sensor 1 monitor (front)].
3. Set voltmeter probes between ECM terminal 63 (HO2S1 bank 1 signal) or 62 (HO2S1 bank 2 signal) and engine
ground.
4. Check the following with engine speed held at 2,000 rpm constant under no load.

SEF039YA
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 12.
NG © GO TO 11.

11 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.

SEF505YA
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner and
approved anti-seize lubricant. Refer to “Commercial Service Tools”, EC-460.

© Replace malfunctioning heated oxygen sensor 1 (front).

EC-678
 HEATED OXYGEN SENSOR 1 (FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

12 CHECK HEATED OXYGEN SENSOR 1 (FRONT) SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Disconnect joint connector-17 or joint connector-18.
3. Check the following.
I Continuity between joint connector terminal 1 or 2 and ground MA
I Joint connector
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
4. Also check harness for short to power.
EM
5. Then reconnect joint connector-17 or joint connector-18.
OK or NG LC
OK © GO TO 13.
NG © Repair open circuit or short to power in harness or connectors.

13 CHECK INTERMITTENT INCIDENT FE

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END
CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-679
 HEATED OXYGEN SENSOR 1 HEATER
(FRONT) WITHOUT EURO-OBD
Description

Description NFEC0123
SYSTEM DESCRIPTION NFEC0123S01

ECM func-
Sensor Input Signal to ECM Actuator
tion

Crankshaft position sensor (POS) Heated oxy-

gen sensor 1 Heated oxygen sensor 1 heaters
Engine speed
heater (front) (front)
Crankshaft position sensor (REF) control

The ECM performs ON/OFF control of the heated oxygen sensor 1 heaters (front) corresponding to the engine
speed.
OPERATION NFEC0123S02

Engine speed rpm Heated oxygen sensor 1 heaters (front)

Above 3,600 OFF

Below 3,600 ON

CONSULT-II Reference Value in Data Monitor

Mode NFEC0124
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

HO2S1 HTR (B1) I Engine speed: Below 3,600 rpm ON

HO2S1 HTR (B2) I Engine speed: Above 3,600 rpm OFF

EC-680
 HEATED OXYGEN SENSOR 1 HEATER
(FRONT) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0128

BANK 1 NFEC0128S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA
MEC292D

SC

EL

IDX

SEF655XE

EC-681
 HEATED OXYGEN SENSOR 1 HEATER
(FRONT) WITHOUT EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0128S02

MEC293D

SEF656XE

EC-682
 HEATED OXYGEN SENSOR 1 HEATER
(FRONT) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0129

1 CHECK OVERALL FUNCTION GI

1. Turn ignition switch “ON”.
2. Set the tester probe between ECM terminals 2 (HO2S1 heater bank 1 signal), 3 (HO2S1 heater bank 2 signal) and
ground. MA
3. Start engine and let it idle.
4. Check the voltage under the following conditions.
EM

LC

FE
SEF007Y

OK or NG CL
OK © INSPECTION END
NG © GO TO 2. MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-683
 HEATED OXYGEN SENSOR 1 HEATER
(FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK HEATED OXYGEN SENSOR 1 (FRONT) POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.

SEF505YA
3. Disconnect corresponding heated oxygen sensor 1 (front) harness connector.

SEF902XA
4. Turn ignition switch “ON”.
5. Check voltage between HO2S1 (front) terminal 2 and ground with CONSULT-II or tester.

SEF311X

OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connector M19
I 15A fuse
I Harness for open or short between heated oxygen sensor 1 (front) and fuse
© Repair harness or connectors.

EC-684
 HEATED OXYGEN SENSOR 1 HEATER
(FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 1 (FRONT) OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal and HO2S1 (front) terminal as follows.
Refer to Wiring Diagram. MA

EM

MTBL0624 LC
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to ground or short to power in harness or connectors. FE

5 CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT) CL

Check resistance between HO2S1 (front) terminals as follows.
MT

AT

AX

SU
SEF310X
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a BR
hard surface such as a concrete floor; use a new one.
OK or NG ST
OK © GO TO 7.
NG © GO TO 6.
RS

BT

HA

SC

EL

IDX

EC-685
 HEATED OXYGEN SENSOR 1 HEATER
(FRONT) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.

SEF505YA
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner and
approved anti-seize lubricant. Refer to “Commercial Service Tools”, EC-460.

© Replace malfunctioning heated oxygen sensor 1 (front).

7 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-686
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Component Description

Component Description NFEC0146

The heated oxygen sensor 2 (rear), after three way catalyst
(manifold), monitors the oxygen level in the exhaust gas on each GI
bank.
Even if switching characteristics of the heated oxygen sensor 1
(front) are shifted, the air fuel ratio is controlled to stoichiometric, MA
by the signal from the heated oxygen sensor 2 (rear).
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner EM
conditions.
Under normal conditions the heated oxygen sensor 2 (rear) is not
SEF327R
used for engine control operation. LC

FE

CL

MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0147
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
HO2S2 (B1)
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S2 (B2) SU
Revving engine from idle up to
HO2S2 MNTR I Engine: After warming up
(B1) 2,000 rpm
LEAN +, RICH BR
HO2S2 MNTR
(B2)

ST

RS

BT

HA

SC

EL

IDX

EC-687
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0152

BANK 1 NFEC0152S01

MEC294D

SEF657XE

EC-688
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0152S02

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MEC295D
HA

SC

EL

IDX

SEF658XE

EC-689
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0153

1 CHECK OVERALL FUNCTION-I

1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set voltmeter probes between ECM terminals 72 (HO2S2 bank 1 signal), 71 (HO2S2 bank 2 signal) and ground.
4. Check the voltage while revving up to 4,000 rpm under no load at least 10 times.
(Depress and release the accelerator pedal as quickly as possible.)

SEF008Y

OK or NG
OK © INSPECTION END
NG © GO TO 2.

2 CHECK OVERALL FUNCTION-II

Keep engine at idle for 10 minutes, then check the voltage between ECM terminals 71, 72 and ground, or check the volt-
age when coasting at 80 km/h (50 MPH) in 3rd gear (M/T), “D” position with “OD” OFF (A/T).

SEF008Y

OK or NG
OK © INSPECTION END
NG © GO TO 3.

EC-690
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”. GI
2. Loosen and retighten engine ground screws.

MA

EM

LC

SEF255X

© GO TO 4. FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-691
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 2 (REAR) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check heated oxygen sensor 2 (rear) harness protector color.

SEF154Z
2. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.

SEF467WB
3. Disconnect ECM harness connector.
4. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.
Refer to Wiring Diagram.

MTBL0504
Continuity should exist.
5. Check harness continuity between ECM terminal or HO2S2 (rear) terminal and ground as follows.
Refer to Wiring Diagram.

MTBL0505
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-692
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK HEATED OXYGEN SENSOR 2 (REAR) GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between HO2S2 (rear) terminal 4 and engine ground. GI
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power. MA
OK or NG
OK (With CONSULT-II) © GO TO 6.
EM
OK (Without CONSULT- © GO TO 7.
II)
NG © Repair open circuit or short to power in harness or connectors LC

6 CHECK HEATED OXYGEN SENSOR 2 (REAR)

With CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
FE
3. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item with CONSULT-
II.
4. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
CL

MT

AT

AX

SEF066Y
SU
“HO2S2 (B1)/(B2)” should be above 0.56V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.54V at least once when the “FUEL INJECTION” is −25%.
CAUTION: BR
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
ST
OK or NG
OK © GO TO 10.
RS
NG © GO TO 9.

BT

HA

SC

EL

IDX

EC-693
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK HEATED OXYGEN SENSOR 2 (REAR)-I

Without CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Set voltmeter probes between ECM terminal 72 (HO2S2 bank 1 signal) or 71 (HO2S2 bank 2 signal) and engine
ground.
4. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)

SEF313XB

OK or NG
OK © GO TO 10.
NG © GO TO 8.

8 CHECK HEATED OXYGEN SENSOR 2 (REAR)-II

Idle vehicle for 10 minutes, then check voltage between the same terminals as in Test No. 6; or check voltage when coast-
ing from 80 km/h (50 MPH) in 3rd gear position (M/T), “D” position with “OD” OFF (A/T).
The voltage should go below 0.54V at least once during this procedure.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 10.
NG © GO TO 9.

9 REPLACE HEATED OXYGEN SENSOR 2 (REAR)

1. Stop vehicle and turn ignition switch “OFF”.
2. Check heated oxygen sensor 2 (rear) harness protector color.

SEF154Z
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner and
approved anti-seize lubricant. Refer to “Commercial Service Tools”, EC-460.

© Replace malfunctioning heated oxygen sensor 2 (rear).

EC-694
 HEATED OXYGEN SENSOR 2 (REAR) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

10 CHECK HEATED OXYGEN SENSOR 2 (REAR) SHIELD CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Disconnect joint connector-17.
3. Check the following.
I Continuity between joint connector terminal 1 and ground MA
I Joint connector
(Refer to EL-406, “HARNESS LAYOUT”.)
Continuity should exist.
4. Also check harness for short to power.
EM
5. Then reconnect joint connector-17.
OK or NG LC
OK © GO TO 11.
NG © Repair open circuit or short to power in harness or connectors.

11 CHECK INTERMITTENT INCIDENT FE

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END
CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-695
 HEATED OXYGEN SENSOR 2 HEATER
(REAR) WITHOUT EURO-OBD
Description

Description NFEC0162
SYSTEM DESCRIPTION NFEC0162S01

ECM func-
Sensor Input Signal to ECM Actuator
tion

Crankshaft position sensor (POS) Heated oxy-

gen sensor 2 Heated oxygen sensor 2 heaters
Engine speed
heater (rear) (rear)
Crankshaft position sensor (REF) control

The ECM performs ON/OFF control of the heated oxygen sensor 2 heaters (rear) corresponding to the engine
speed.
OPERATION NFEC0162S02

Engine speed rpm Heated oxygen sensor 2 heaters (rear)

Above 3,600 OFF

Below 3,600 ON

CONSULT-II Reference Value in Data Monitor

Mode NFEC0163
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Ignition switch: ON (Engine stopped)

OFF
HO2S2 HTR (B1) I Engine is running above 3,600 rpm.
HO2S2 HTR (B2) I Engine is running below 3,600 rpm after driving for 2 minutes at a
ON
speed of 70 km/h (43 MPH) or more.

EC-696
 HEATED OXYGEN SENSOR 2 HEATER
(REAR) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0167

BANK 1 NFEC0167S01
GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA
MEC294D

SC

EL

IDX

SEF659XE

EC-697
 HEATED OXYGEN SENSOR 2 HEATER
(REAR) WITHOUT EURO-OBD
Wiring Diagram (Cont’d)
BANK 2 NFEC0167S02

MEC295D

SEF660XE

EC-698
 HEATED OXYGEN SENSOR 2 HEATER
(REAR) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0168

1 CHECK OVERALL FUNCTION GI

Without CONSULT-II
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running. MA
3. Set the voltmeter probe between ECM terminals 5 (HO2S2 heater bank 1 signal), 4 (HO2S2 heater bank 2 signal) and
ground.
4. Check the voltage under the following conditions. EM

LC

FE

SEF010Y CL
OK or NG
OK © INSPECTION END MT
NG © GO TO 2.

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-699
 HEATED OXYGEN SENSOR 2 HEATER
(REAR) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK HEATED OXYGEN SENSOR 2 (REAR) POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 2 (rear) harness protector color.

SEF154Z
3. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.

SEF467WB
4. Turn ignition switch “ON”.
5. Check voltage between HO2S2 (rear) terminal 3 and ground.

SEF314X

OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connector M19
I 15A fuse
I Harness for open or short between heated oxygen sensor 2 (rear) and fuse
© Repair harness or connectors.

EC-700
 HEATED OXYGEN SENSOR 2 HEATER
(REAR) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK HEATED OXYGEN SENSOR 2 (REAR) OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.
Refer to Wiring Diagram. MA

EM

MTBL0506 LC
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to ground or short to power in harness or connectors. FE

5 CHECK HEATED OXYGEN SENSOR 2 HEATER (REAR) CL

Check the resistance between HO2S2 (rear) terminals as follows.
MT

AT

AX

SU
SEF315X
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a BR
hard surface such as a concrete floor; use a new one.
OK or NG ST
OK © GO TO 7.
NG © GO TO 6.
RS
6 REPLACE HEATED OXYGEN SENSOR 2 (REAR)
BT
Check heated oxygen sensor 2 (rear) harness protector color.

HA

SC

EL

SEF154Z
IDX
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner and
approved anti-seize lubricant. Refer to “Commercial Service Tools”, EC-460.
© Replace malfunctioning heated oxygen sensor 2 (rear).

EC-701
 HEATED OXYGEN SENSOR 2 HEATER
(REAR) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-702
FUEL TANK TEMPERATURE SENSOR WITHOUT EURO-OBD
Component Description

Component Description NFEC0177

The fuel tank temperature sensor is used to detect the fuel tem-
perature inside the fuel tank. The sensor modifies a voltage signal GI
from the ECM. The modified signal returns to the ECM as the fuel
temperature input. The sensor uses a thermistor which is sensitive
to the change in temperature. The electrical resistance of the ther- MA
mistor decreases as temperature increases.
EM

SEF263X LC
<Reference data>
Fuel temperature
Voltage* V Resistance kΩ
°C (°F)

20 (68) 3.5 2.3 - 2.7

FE
50 (122) 2.2 0.79 - 0.90

*: These data are reference values and are measured between ECM terminal 92
(Fuel tank temperature sensor) and ground.
CL
CAUTION:
Do not use ECM ground terminals when measuring input/ MT
SEF012P
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground. AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-703
 FUEL TANK TEMPERATURE SENSOR WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0180

MEC428D

EC-704
 FUEL TANK TEMPERATURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0181

1 CHECK OVERALL FUNCTION GI

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 92 and ground with CONSULT-II or tester.
MA

EM

LC

SEF042Y

OK or NG
FE
OK © INSPECTION END
NG © GO TO 2. CL

2 CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT MT

1. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit and fuel pump harness connector.
AT

AX

SU

BR

SEF263X
3. Turn ignition switch “ON”. ST
4. Check voltage between fuel level sensor unit and fuel pump terminal 4 and ground with CONSULT-II or tester.

RS

BT

HA

SC
SEF586X

OK or NG EL
OK © GO TO 4.
NG © GO TO 3.
IDX

EC-705
 FUEL TANK TEMPERATURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors B3, M6 or B2, M2
I Harness connectors M81, F49
I Harness for open or short between ECM and fuel level sensor unit and fuel pump
© Repair harness or connector.

4 CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between fuel level sensor unit and fuel pump terminal 5 and body ground. Refer to Wiring
Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to power in harness or connectors.

5 CHECK FUEL TANK TEMPERATURE SENSOR

1. Remove fuel level sensor unit.
2. Check resistance between fuel level sensor unit and fuel pump terminals 4 and 5 by heating with hot water or heat gun
as shown in the figure.

SEF587X

OK or NG
OK © GO TO 6.
NG © Replace fuel level sensor unit.

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-706
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Description

Description NFEC0497
SYSTEM DESCRIPTION NFEC0497S01
GI
ECM func-
Sensor Input Signal to ECM Actuator
tion
MA
Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

EM
Vehicle speed sensor Vehicle speed

Engine coolant temperature sensor Engine coolant temperature

LC
Ignition switch Start signal

Throttle position sensor Throttle position

EGR vol-
Battery Battery voltage EGR volume control valve
ume control
Mass air flow sensor Amount of intake air FE
Air conditioner switch Air conditioner operation

Power steering oil pressure switch Power steering load signal CL

Electrical load Electrical load signal

PNP switch Park/Neutral position signal MT

TCM (Transmission Control Module) Gear position, shifting signal
AT
This system controls flow rate of EGR led from exhaust manifold
to intake manifold. The opening of the EGR by-pass passage in the
EGR volume control valve changes to control the flow rate. A AX
built-in step motor moves the valve in steps corresponding to the
ECM output pulses. The opening of the valve varies for optimum
engine control. The optimum value stored in the ECM is determined SU
by considering various engine conditions. The EGR volume control
valve remains close under the following conditions.
I Engine stopped BR
I Engine starting
I Engine idling
I Low engine coolant temperature
ST
I Excessively high engine coolant temperature
I High engine speed RS
I Wide open throttle
I Low battery voltage
BT

HA

SC

EL
SEF551W
IDX

EC-707
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Description (Cont’d)
COMPONENT DESCRIPTION NFEC0497S02
EGR volume control valve NFEC0497S0201
The EGR volume control valve uses a step motor to control the flow
rate of EGR from exhaust manifold. This motor has four winding
phases. It operates according to the output pulse signal of the
ECM. Two windings are turned ON and OFF in sequence. Each
time an ON pulse is issued, the valve opens or closes, changing
the flow rate. When no change in the flow rate is needed, the ECM
does not issue the pulse signal. A certain voltage signal is issued
so that the valve remains at that particular opening.
SEF552W

EGR Temperature Sensor NFEC0497S0204

The EGR temperature sensor detects temperature changes in the
EGR passage way. When the EGR volume control valve opens, hot
exhaust gases flow, and the temperature in the passage way
changes. The EGR temperature sensor is a thermistor that modi-
fies a voltage signal sent from the ECM. This modified signal then
returns to the ECM as an input signal. As the temperature
increases, EGR temperature sensor resistance decreases.
This sensor is not used to control the engine system.

SEF599K

<Reference data>
EGR temperature Voltage* Resistance
°C (°F) V MΩ

0 (32) 4.61 0.68 - 1.11

50 (122) 2.53 0.09 - 0.12

100 (212) 0.87 0.017 - 0.024

*: These data are reference values and are measured between ECM terminal 74
(EGR temperature sensor) and ground.
When EGR system is operating.
Voltage: 0 - 1.5V
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.

SEF320U

CONSULT-II Reference Value in Data Monitor

Mode NFEC0498
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

EGR TEMP SEN I Engine: After warming up Less than 4.5V

I Engine: After warming up Idle 0 step

I Air conditioner switch: “OFF”
EGR VOL CON/V
I Shift lever: “N” Revving engine up to 3,000 rpm
10 - 55 step
I No-load quickly

EC-708
EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0502

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC361D
HA

SC

EL

IDX

SEF666XC

EC-709
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0503

1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes © GO TO 2.
No © GO TO 4.

2 CHECK OVERALL FUNCTION-I

With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Confirm that “COOLAN TEMP/S” indicates less than 40°C (104°F).
If the indication is out of range, cool the engine down.

SEF013Y
4. Start engine and let it idle.
5. Make sure that “EGR TEMP SEN” in “DATA MONITOR” mode indicates more than 3V. Print out the screen or note the
indication.

SEF014Y

OK or NG
OK © GO TO 3.
NG © GO TO 6.

EC-710
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK OVERALL FUNCTION-II

With CONSULT-II GI
1. Warm up engine to normal operating temperature.
2. Select “EGR VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Keep engine speed at 2,000 rpm and set the “EGR VOL CONT/V” opening to “20 step”. MA
4. Make sure the “EGR TEMP SEN” indicated is lower than the value indicated in test No. 2 by 1.0V or more.

EM

LC

FE
SEF015Y

OK or NG
OK © INSPECTION END
CL
NG © GO TO 6.
MT
4 CHECK OVERALL FUNCTION-I
Without CONSULT-II AT
1. Turn ignition switch “ON”.
2. Confirm that the voltage between ECM terminal 70 (Engine coolant temperature sensor signal) and ground is more
than 2.72V. AX
If the voltage is out of range, cool the engine down.

SU

BR

ST

RS
SEF016Y
3. Start engine and let it idle.
4. Make sure that the voltage between ECM terminal 74 (EGR temperature sensor signal) and ground is more than 3V. BT

HA

SC

EL

SEF017Y
IDX
OK or NG
OK © GO TO 5.
NG © GO TO 6.

EC-711
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK OVERALL FUNCTION-II

Without CONSULT-II
1. Warm up engine to normal operating temperature.
2. Rev engine from idle up to about 3,000 rpm two to three times.
3. Make sure the voltage between ECM terminal 74 and ground is lower than the voltage measured in test No. 4 by 1.0V
or more.

SEF017Y

OK or NG
OK © INSPECTION END
NG © GO TO 6.

6 CHECK EGR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect EGR temperature sensor harness connector.

SEF277X
3. Turn ignition switch “ON”.
4. Check voltage between EGR temperature sensor terminal 2 and ground with CONSULT-II or tester.

SEF896X

OK or NG
OK © GO TO 8.
NG © GO TO 7.

EC-712
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness connectors F4, F71
I Harness for open or short between ECM and EGR temperature sensor
© Repair or replace harness or connectors. MA

8 CHECK EGR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT EM
1. Turn ignition switch “OFF”.
2. Check harness continuity between EGR temperature sensor terminal 1 and engine ground. Refer to Wiring Diagram.
Continuity should exist. LC
3. Also check harness for short to power.
OK or NG
OK © GO TO 10.
NG © GO TO 9.
FE
9 DETECT MALFUNCTIONING PART
CL
Check the following.
I Harness connectors F4, F71
I Harness for open or short between ECM and EGR temperature sensor MT
I Harness for open or short between TCM (Transmission Control Module) and EGR temperature sensor
© Repair open circuit or short to power in harness or connector.
AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-713
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

10 CHECK EGR TEMPERATURE SENSOR

1. Remove EGR temperature sensor.
2. Check resistance between EGR temperature sensor terminals 1 and 2 under the following conditions.

SEF353X

OK or NG
OK © GO TO 11.
NG © Replace EGR temperature sensor.

EC-714
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

11 CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT

1. Disconnect EGR volume control valve harness connector. GI

MA

EM

LC

SEF265X
2. Turn ignition switch “ON”.
3. Check voltage between EGR volume control valve terminals 2, 5 and ground with CONSULT-II or tester.
FE

CL

MT

AT
SEF327X

OK or NG AX
OK © GO TO 13.
NG © GO TO 12. SU

12 DETECT MALFUNCTIONING PART

BR
Check the following.
I Harness connectors E15, F18
I Harness connectors F4, F71 ST
I Harness for open or short between ECM relay and EGR volume control valve
© Repair harness or connectors.
RS

BT

HA

SC

EL

IDX

EC-715
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

13 CHECK EGR VOLUME CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals and EGR volume control valve terminals as follows.
Refer to Wiring Diagram.

MTBL0356
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 15.
NG © GO TO 14.

14 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F4, F71
I Harness for open or short between ECM and EGR volume control valve
© Repair open circuit or short to ground or short to power in harness or connectors.

15 CHECK EGR VOLUME CONTROL VALVE-I

1. Disconnect EGR volume control valve.
2. Check resistance between EGR volume control valve terminal 2 and terminals 1, 3, terminal 5 and terminals 4, 6.

SEF588X

OK or NG
OK (With CONSULT-II) © GO TO 16.
OK (Without CONSULT- © GO TO 17.
II)
NG © Replace EGR volume control valve.

EC-716
 EGR VOLUME CONTROL SYSTEM WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

16 CHECK EGR VOLUME CONTROL VALVE-II

With CONSULT-II GI
1. Remove EGR volume control valve.
2. Reconnect ECM harness connector and EGR volume control valve harness connector.
3. Turn ignition switch ON. MA
4. Perform “EGR VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II.
5. Check that EGR volume control valve shaft moves smoothly forward and backward according to the valve opening
steps.
EM

LC

FE

SEF067Y
CL
OK or NG
OK © GO TO 18.
MT
NG © Replace EGR volume control valve.

AT
17 CHECK EGR VOLUME CONTROL VALVE-II
Without CONSULT-II
1. Remove EGR volume control valve. AX
2. Reconnect ECM harness connector and EGR volume control valve harness connector.
3. Turn ignition switch ON and OFF.
4. Check that EGR volume control valve shaft moves smoothly forward and backward according to the ignition switch SU
position.

BR

ST

RS

BT
SEF560W

OK or NG
HA
OK © GO TO 18.
NG © Replace EGR volume control valve.
SC
18 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566. EL
© INSPECTION END
IDX

EC-717
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Description

Description NFEC0221
SYSTEM DESCRIPTION NFEC0221S01

ECM
Sensor Input Signal to ECM Actuator
function

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperature

Ignition switch Start signal EVAP can-

EVAP canister purge volume
Throttle position sensor Throttle position ister purge
control solenoid valve
flow control
Throttle position switch Closed throttle position

Density of oxygen in exhaust gas

Front heated oxygen sensors
(Mixture ratio feedback signal)

Fuel tank temperature sensor Fuel temperature in fuel tank

Vehicle speed sensor Vehicle speed

This system controls flow rate of fuel vapor from the EVAP canis-
ter. The opening of the vapor by-pass passage in the EVAP canis-
ter purge volume control solenoid valve changes to control the flow
rate. The EVAP canister purge volume control solenoid valve
repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control.
The optimum value stored in the ECM is determined by consider-
ing various engine conditions. When the engine is operating, the
flow rate of fuel vapor from the EVAP canister is regulated as the
air flow changes.

COMPONENT DESCRIPTION NFEC0221S02

The EVAP canister purge volume control solenoid valve uses a
ON/OFF duty to control the flow rate of fuel vapor from the EVAP
canister. The EVAP canister purge volume control solenoid valve
is moved by ON/OFF pulses from the ECM. The longer the ON
pulse, the greater the amount of fuel vapor that will flow through the
valve.

SEF337U

CONSULT-II Reference Value in Data Monitor

Mode NFEC0222
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

I Engine: After warming up Idle (Vehicle stopped) 0%

I Air conditioner switch “OFF”
PURG VOL C/V
I Shift lever: “N”
I No-load 2,000 rpm —

EC-718
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0226

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

MEC429D RS

BT

HA

SC

EL

IDX

SEF858Y

EC-719
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0227

1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes © GO TO 2.
No © GO TO 3.

2 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE CONTROL FUNCTION
With CONSULT-II
1. Turn ignition switch “OFF”.
2. Disconnect the EVAP purge hose connected to the EVAP canister purge volume control solenoid valve at the EVAP
canister.
3. Turn ignition switch “ON” and select “PURG VOL CONT/V” in “DATA MONITOR” mode with CONSULT-II.
4. Start engine and let it idle.
5. Change the valve opening percentage “Qu” and “Qd” and check for vacuum existence under the following conditions.

SEF156Z

OK or NG
OK © GO TO 4.
NG © GO TO 5.

3 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE CONTROL FUNCTION
Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Disconnect the EVAP purge hose connected to the EVAP canister purge volume control solenoid valve at the EVAP
canister.
3. Start engine and let it idle for at least 80 seconds.
4. Check for vacuum existence at the EVAP purge hose under the following conditions.

SEF019Y

OK or NG
OK © GO TO 4.
NG © GO TO 5.

EC-720
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK EVAP CANISTER

1. Turn ignition switch “OFF”. GI
2. Remove EVAP canister.
3. Block port B of EVAP canister.
4. Blow air through port A orally, and confirm that air flows freely through port C with check valve resistance. MA
5. Block port A of EVAP canister.
6. Blow air through port B orally, and confirm that air flows freely through port C.
EM

LC

FE
SEF917W

OK or NG CL
OK © INSPECTION END
NG © Replace EVAP canister. MT

5 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT AT
1. Turn ignition switch “OFF”.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
AX

SU

BR

ST
SEF266X
3. Turn ignition switch “ON”. RS
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 2 and ground with CONSULT-II or
tester.
BT

HA

SC

EL
SEF998X

OK or NG IDX
OK © GO TO 7.
NG © GO TO 6.

EC-721
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connector M19
I 15A fuse
I Harness for open or short between EVAP canister purge volume control solenoid valve and fuse
© Repair harness or connectors.

7 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 1 and EVAP canister purge volume control solenoid valve terminal 1.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT-II) © GO TO 8.
OK (Without CONSULT- © GO TO 9.
II)
NG © Repair open circuit or short to ground and short to power in harness or connetors.

8 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT-II
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that engine speed varies according
to the valve opening.

SEF677Y

OK or NG
OK © GO TO 10.
NG © GO TO 9.

EC-722
 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-II GI
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

MA

EM

LC

SEF334X

Without CONSULT-II FE
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

CL

MT

AT

AX
SEF335X

OK or NG
OK © GO TO 10.
SU
NG © Replace EVAP canister purge volume control solenoid valve.
BR
10 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566. ST
© INSPECTION END
RS

BT

HA

SC

EL

IDX

EC-723
 VEHICLE SPEED SENSOR (VSS) WITHOUT EURO-OBD
Component Description

Component Description =NFEC0242

The vehicle speed sensor is installed in the transaxle. It contains a
pulse generator which provides a vehicle speed signal to the
speedometer. The speedometer then sends a signal to the ECM.

AEC110

EC-724
VEHICLE SPEED SENSOR (VSS) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0247

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

MEC430D RS

BT

HA

SC

EL

IDX

SEF859Y

EC-725
 VEHICLE SPEED SENSOR (VSS) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0248

1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes © GO TO 2.
No © GO TO 3.

2 CHECK OVERALL FUNCTION

With CONSULT-II
1. Turn ignition switch “OFF”.
2. Lift up the vehicle.
3. Start engine and let it idle.
4. Select “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-II.
5. Check “VHCL SPEED SE” indication when rotating wheels with suitable gear position.

SEF020Y

OK or NG
OK © INSPECTION END
NG © GO TO 4.

3 CHECK OVERALL FUNCTION

Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Lift up the vehicle.
3. Start engine and let it idle.
4. Read the voltage signal between ECM terminal 86 and ground with an oscilloscope.
5. Verify that the oscilloscope screen shows a signal wave as shown below under the following conditions.

SEF021Y

OK or NG
OK © INSPECTION END
NG © GO TO 4.

EC-726
 VEHICLE SPEED SENSOR (VSS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK VEHICLE SPEED SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”. GI
2. Disconnect ECM harness connector and combination meter harness connector.
3. Check harness continuity between ECM terminal 86 and combination meter terminal 32.
Refer to Wiring Diagram. MA
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG EM
OK © GO TO 6.
NG © GO TO 5. LC

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Harness for open or short between ECM and combination meter FE
© Repair open circuit or short to ground or short to power in harness or connectors.
CL
6 CHECK SPEEDOMETER FUNCTION
Make sure that speedometer functions properly. MT
OK or NG
OK © GO TO 8.
AT
NG © GO TO 7.

AX
7 CHECK SPEEDOMETER CIRCUIT FOR OPEN AND SHORT
Check the following.
I Harness connectors M81, F49 SU
I Harness connectors F19, F111
I Harness connectors M15, E81
I Harness for open or short between combination meter and ABS actuator and electric unit BR
I Harness for open or short between combination meter and vehicle speed sensor
I Harness for open or short between vehicle speed sensor and ECM
I Harness for open or short between vehicle speed sensor and TCM (Transmission control module) ST
OK or NG
OK © Check combination meter and vehicle speed sensor. Refer to EL section. RS
NG © Repair open circuit or short to ground or short to power in harness or connectors.

BT
8 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
HA
© INSPECTION END

SC

EL

IDX

EC-727
 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC)
VALVE WITHOUT EURO-OBD
Description

Description NFEC0249
SYSTEM DESCRIPTION NFEC0249S01

ECM func-
Sensor Input Signal to ECM Actuator
tion

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

Mass air flow sensor Amount of intake air

Engine coolant temperature sensor Engine coolant temperature

Ignition switch Start signal

Throttle position sensor Throttle position

Park/neutral position (PNP) switch Park/neutral position Idle air

IACV-AAC valve
Air conditioner switch Air conditioner operation control

Power steering oil pressure switch Power steering load signal

Battery Battery voltage

Vehicle speed sensor Vehicle speed

Ambient air temperature switch Ambient air temperature

Intake air temperature sensor Intake air temperature

Absolute pressure sensor Ambient barometic pressure

This system automatically controls engine idle speed to a specified

level. Idle speed is controlled through fine adjustment of the
amount of air which by-passes the throttle valve via IACV-AAC
valve. The IACV-AAC valve changes the opening of the air by-pass
passage to control the amount of auxiliary air. This valve is actu-
ated by a step motor built into the valve, which moves the valve in
the axial direction in steps corresponding to the ECM output sig-
nals. One step of IACV-AAC valve movement causes the respec-
tive opening of the air by-pass passage. (i.e. when the step
advances, the opening is enlarged.) The opening of the valve is
varied to allow for optimum control of the engine idling speed. The
crankshaft position sensor (POS) detects the actual engine speed
and sends a signal to the ECM. The ECM then controls the step
position of the IACV-AAC valve so that engine speed coincides with
the target value memorized in ECM. The target engine speed is the
lowest speed at which the engine can operate steadily. The opti-
mum value stored in the ECM is determined by takig into consid-
eration various engine conditions, such as during warm up,
deceleration, and engine load (air conditioner, power steering and
cooling fan operation).
NOTE:
If engine idle speed is out of the specified value, perform “Idle Air
Volume Learning”, EC-488. For the target idle speed, refer to “Ser-
vice Data and Specifications (SDS), EC-820.

EC-728
 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC)
VALVE WITHOUT EURO-OBD
Description (Cont’d)
COMPONENT DESCRIPTION NFEC0249S02
IACV-AAC Valve NFEC0249S0201
The IACV-AAC valve is operated by a step motor for centralized GI
control of auxiliary air supply. This motor has four winding phases
and is actuated by the output signals of ECM which turns ON and
OFF two windings each in seqeunce. Each time the IACV-AAC MA
valve opens or closes to change tha auxiliary air quantity, the ECM
sends a pulse signal to the step motor. When no change in the
auxiliary air quantity is needed, the ECM does not issue the pulse EM
signal. A certain voltage signal is issued so that the valve remains
at that particular opening.
SEF765P LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC0250
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
I Engine: After warming up Idle 2 - 10 step
I Air conditioner switch: “OFF”
IACV-AAC/V CL
I Shift lever: “N”
I No-load 2,000 rpm —

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-729
 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC)
VALVE WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0254

MEC431D

SEF625XB

EC-730
 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC)
VALVE WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0255

1 CHECK OVERALL FUNCTION GI

1. Turn ignition switch “OFF”.
2. Read the voltage signal between ECM terminals 6, 7, 8, 17 (IACV-AAC valve signal) and ground with an oscilloscope.
3. Turn ignition switch “ON”, wait at least 5 seconds and then “OFF”. MA
4. Verify that the oscilloscope screen shows the signal wave as shown below at least once every 10 seconds after turning
ignition switch “OFF”.
EM

LC

FE
SEF022Y

OK or NG
CL
OK © INSPECTION END
NG © GO TO 2.
MT

2 CHECK IACV-AAC VALVE POWER SUPPLY CIRCUIT AT

1. Turn ignition switch “OFF”.
2. Disconnect IACV-AAC valve harness connector.
AX

SU

BR

ST

SEC008C
3. Turn ignition switch “ON”.
RS
4. Check voltage between IACV-AAC valve terminals 2, 5 and ground with CONSULT-II or tester.
BT

HA

SC

EL
SEF343X

OK or NG IDX
OK © GO TO 4.
NG © GO TO 3.

EC-731
 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC)
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E15, F18
I Harness for open or short between IACV-AAC valve and ECM relay
© Repair harness or connectors.

4 CHECK IACV-AAC VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals and IACV-AAC valve terminals as follows.
Refer to Wiring Diagram.

MTBL0354
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK AIR CONTROL VALVE (POWER STEERING) OPERATION-I

1. Reconnect the ECM harness connector and IACV-AAC valve harness connector.
2. Disconnect the vacuum hose connected to the air control valve (Power steering) at the intake air duct.
3. Start engine and let it idle.
4. Check vacuum hose for vacuum existence.

SEF971X
Vacuum slightly exists or does not exist.
OK or NG
OK © GO TO 6.
NG © Replace air control valve (Power steering).

EC-732
 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC)
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK AIR CONTROL VALVE (POWER STEERING) OPERATION-II

Check the vacuum hose for vacuum existence when steering wheel is turned. GI

MA

EM

LC

SEF971X
Vacuum should exist.
OK or NG
FE
OK © GO TO 9.
NG © GO TO 7.
CL
7 CHECK VACUUM PORT
1. Stop engine. MT
2. Disconnect the vacuum hose connected to the air control valve (Power steering) at the vacuum port.
3. Blow air into vacuum port.
4. Check that air flows freely. AT

AX

SU

BR

SEF972X ST
OK or NG
OK © GO TO 8. RS
NG © Repair or clean vacuum port.
BT

HA

SC

EL

IDX

EC-733
 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC)
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK VACUUM HOSES AND TUBES

1. Disconnect vacuum hoses between the air control valve (Power steering) and vacuum port, air control valve (Power
steering) and air duct.
2. Check hoses and tubes for cracks, clogging, improper connection or disconnection.

SEF109L

OK or NG
OK © GO TO 9.
NG © Repair hoses or tubes.

9 CHECK IACV-AAC VALVE-I

1. Disconnect IACV-AAC valve harness connector.
2. Check resistance between IACV-AAC valve terminal 2 and terminals 1, 3, terminal 5 and terminals 4, 6.

SEF344X

OK or NG
OK © GO TO 10.
NG © Replace IACV-AAC valve assembly.

EC-734
 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC)
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

10 CHECK IACV-AAC VALVE-II

1. Reconnect IACV-AAC valve harness connetor and ECM harness connector. GI
2. Turn ignition switch “ON” and “OFF”, and ensure the IACV-AAC valve makes operating sound according to the ignition
switch position.
MA

EM

LC

SEC009C

OK or NG FE
OK © GO TO 12.
NG © GO TO 11. CL

11 REPLACE IACV-AAC VALVE MT

1. Replace IACV-AAC valve assembly.
2. Perform “Idle Air Volume Learning”, EC-488.
Which is the result CMPLT or INCMP? AT
CMPLT or INCMP
CMPLT © INSPECTION END AX
INCMP © Follow the construction of “Idle Air Volume Learning”.
SU
12 CHECK TARGET IDLE SPEED
1. Turn ignition switch “OFF”. BR
2. Reconnect all harness connectors and vacuum hoses.
3. Start engine and warm it up to normal operating temperature.
4. Also warm up transmission to normal operating temperature.
I For A/T models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “A/T” system indi-
ST
cates less than 0.9V.
I For A/T models without CONSULT-II and M/T models, drive vehicle for 10 minutes.
5. Stop vehicle with engine running.
RS
6. Check target idle speed.
M/T: 625±50 rpm (VQ30DE engine models)
M/T: 675±50 rpm (VQ20DE engine models)
BT
A/T: 700±50 rpm (in “P” or “N” position)
OK or NG HA
OK © GO TO 13.
NG © Perform “Idle Air Volume Learning”, EC-488. SC

13 CHECK INTERMITTENT INCIDENT

EL
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END
IDX

EC-735
 CLOSED THROTTLE POSITION SWITCH WITHOUT EURO-OBD
Component Description

Component Description NFEC0256

A closed throttle position switch and wide open throttle position
switch are built into the throttle position sensor unit. The wide open
throttle position switch is used only for A/T control.
When the throttle valve is in the closed position, the closed throttle
position switch sends a voltage signal to the ECM. The ECM only
uses this signal to open or close the EVAP canister purge volume
control solenoid valve when the throttle position sensor is malfunc-
tioning.

SEF505V

EC-736
CLOSED THROTTLE POSITION SWITCH WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0262

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC432D
HA

SC

EL

IDX

SEF626XD

EC-737
 CLOSED THROTTLE POSITION SWITCH WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0263

1 CHECK OVERALL FUNCTION

1. Start engine and warm it up to normal operating temperature.
2. Check the voltage between ECM terminal 56 and ground under the following conditions.

SEF023Y

OK or NG
OK © INSPECTION END
NG © GO TO 2.

2 CHECK CLOSED THROTTLE POSITION SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect throttle position switch harness connector.

SEC001C
3. Turn ignition switch “ON”.
4. Check voltage between throttle position switch terminal 5 and engine ground with CONSULT-II or tester.

SEF346X

OK or NG
OK © GO TO 4.
NG © GO TO 3.

EC-738
 CLOSED THROTTLE POSITION SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness connectors E15, F18
I Harness for open or short between throttle position switch and ECM relay
I Harness for open or short between throttle position switch and ECM MA
© Repair harness or connectors.

EM
4 CHECK CLOSED THROTTLE POSITION SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector. LC
3. Check harness continuity between ECM terminal 56 and throttle position switch terminal 4.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG FE
OK © GO TO 5.
NG © Repair open circuit or short to ground or short to power in harness or connectors.
CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-739
 CLOSED THROTTLE POSITION SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK THROTTLE POSITION SWITCH

1. Reconnect ECM harness connector and throttle position switch harness connector.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch “OFF”.
NOTE:
Steps 4 to 6 should be performed for only models with throttle opener. For models without throttle opener, skip steps 4
to 6 and go to the step 7.
4. Remove vacuum hose connected to throttle opener.
5. Connect suitable vacuum hose to vacuum pump and the throttle opener.
6. Apply vacuum [more than −40.0 kPa (–400 mbar, −300 mmHg, −11.81 inHg)] until the throttle drum becomes free from
the rod of the throttle opener.

SEF793W
7. Disconnect closed throttle position switch harness connector.
8. Check continuity between closed throttle position switch terminals 4 and 5 under the following conditions.
Resistance measurement must be made with throttle position switch installed in vehicle.

SEC010C

OK or NG
OK © GO TO 7.
NG © GO TO 6.

EC-740
 CLOSED THROTTLE POSITION SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 ADJUST THROTTLE POSITION SWITCH

Check the following items. Refer to “Basic Inspection”, EC-514. GI

MA

EM

LC
MTBL0623
Is it possible to adjust closed throttle position switch?
Yes or No
Yes © GO TO 1. FE
No © Replace throttle position switch.

CL
7 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
MT
© INSPECTION END

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-741
 A/T COMMUNICATION LINE WITHOUT EURO-OBD
System Description

System Description NFEC0264

These circuit lines are used to control the smooth shifting up and down of A/T during the hard acceleration/
deceleration.
Voltage signals are exchanged between ECM and TCM (Transmission Control Module).

EC-742
A/T COMMUNICATION LINE WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0269

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC073D
HA

SC

EL

IDX

SEF043YA

EC-743
 A/T COMMUNICATION LINE WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0270

1 CHECK OVERALL FUNCTION

1. Start engine and warm it up to normal operating temperature.
2. Check the voltage between ECM terminals 36, 37, 68, 77, 78 and ground.

SEF024Y

OK or NG
OK © INSPECTION END
NG © GO TO 2.

EC-744
 A/T COMMUNICATION LINE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR OPEN

1. Turn ignition switch “OFF”. GI
2. Disconnect ECM harness connector and TCM (Transmission Control Module) harness connector.

MA

EM

LC

SEF044Y

FE

CL

MT

AT
SEF271X
3. Check harness continuity between the following terminals.
AX

SU

BR
MTBL0405
Refer to Wiring Diagram.
Continuity should exist. ST
OK or NG
OK © GO TO 3. RS
NG © Repair harness or connectors.

BT
3 CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR SHORT
1. Check harness continuity between ECM terminals 36, 37, 68, 77, 78 and ground.
Refer to Wiring Diagram.
HA
Continuity should not exist.
2. Also check harness for short to power.
SC
OK or NG
OK © GO TO 4.
EL
NG © Repair short to ground or short to power in harness or connectos.

4 CHECK INTERMITTENT INCIDENT

IDX
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-745
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Description

Description NFEC0523
SYSTEM DESCRIPTION NFEC0523S01

ECM func-
Sensor Input Signal to ECM Actuator
tion

Throttle position sensor Throttle position

Ignition switch Start signal Swirl control valve control sole-

noid valve
Crankshaft position sensor (POS) Engine speed (POS signal) Swirl con-
" Vacuum signal
trol valve
Crankshaft position sensor (REF) Engine speed (REF signal) Swirl control valve actuator
control
"
Mass air flow sensor Amount of intake air Swirl control valve

Engine coolant temperature sensor Engine coolant temperature

This system has a swirl control valve in the intake passage of each
cylinder.
While idling and during low engine speed operation, the swirl con-
trol valve closes. Thus the velocity of the air in the intake passage
increases, promoting the vaporization of the fuel and producing a
swirl in the combustion chamber.
Because of this operation, this system tends to increase the burn-
ing speed of the gas mixture, improve fuel consumption, and
increase the stability in running conditions.
Also, except when idling and during low engine speed operation,
this system opens the swirl control valve. In this condition, this
system tends to increase power by improving intake efficiency via
reduction of intake flow resistance, intake flow.
The solenoid valve controls swirl control valve’s shut/open condi-
tion. This solenoid valve is operated by the ECM.
Throttle position Swirl control valve
sensor (Idle posi- Engine speed control solenoid Swirl control valve
tion) valve

ON Below 3,200 rpm ON Closed

Less than 3,200

ON Closed
rpm
OFF
More than 3,600
OFF Open
rpm

When engine coolant temperature is below 10°C (50°F) and above 55°C (131°F),
swirl control valve is kept open regardless of above condition.

SEF045Y

EC-746
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Description (Cont’d)
COMPONENT DESCRIPTION NFEC0523S02
Swirl Control Valve Control Solenoid Valve NFEC0523S0201
The swirl control valve control solenoid valve responds to signals GI
from the ECM. When the ECM sends an ON (ground) signal, the
solenoid valve is bypassed to apply intake manifold vacuum to the
swirl control valve actuator. This operation closes the swirl control MA
valve. When the ECM sends an OFF signal, the vacuum signal is
cut and the swirl control valve opens.
EM

SEF272X LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC0524
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
Engine coolant temperature is
between 15°C (59°F) to 50°C ON
SWRL CONT S/V I Engine speed: Idle (122°F). CL
Engine coolant temperature is
OFF
above 55°C (131°F).
MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-747
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0529

MEC433D

SEF627XB

EC-748
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0530

1 INSPECTION START GI
Do you have CONSULT-II?
Yes or No MA
Yes © GO TO 2.
No © GO TO 3.
EM
2 CHECK OVERALL FUNCTION
LC
With CONSULT-II
1. Start engine and let it idle.
2. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON” and “OFF” alternately on CONSULT-II screen.
4. Make sure the swirl control valve actuator rod moves according to “SWIRL CONT SOL/V”.
FE

CL

MT

AT
SEF621X

OK or NG AX
OK © INSPECTION END
NG © GO TO 4. SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-749
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK OVERALL FUNCTION

Without CONSULT-II
1. Turn ignition switch “ON”.
2. Confirm that the voltage between ECM terminal 70 (Engine coolant temperature sensor signal) and ground is more
than 2.72V. If the voltage is out of range, cool the engine down.

SEF016Y
3. Start engine and let it idle.
4. Make sure the swirl control valve actuator rod moves when revving to over 3,200 rpm from idle.

SEF621X

OK or NG
OK © INSPECTION END
NG © GO TO 5.

EC-750
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK VACUUM SOURCE

With CONSULT-II GI
1. Turn ignition switch “OFF”.
2. Disconnect the vacuum hose connected to the swirl control valve actuator at vacuum tank.
3. Start engine and let it idle. MA
4. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
5. Touch “ON” and “OFF” alternately on CONSULT-II screen.
6. Check vacuum existence under the following conditions.
EM

LC

FE

SEF026Y
CL
OK or NG
OK © GO TO 6.
MT
NG © GO TO 7.

AT
5 CHECK VACUUM SOURCE
Without CONSULT-II
1. Turn ignition switch “OFF”. AX
2. Disconnect the swirl control valve control solenoid valve harness connector.
3. Disconnect the vacuum hose connected to the swirl control valve actuator at vacuum tank.
4. Start engine and let it idle. SU
5. Apply 12V of direct current between swirl control valve control solenoid valve terminals 1 and 2.
6. Check vacuum existence under the following conditions.
BR

ST

RS

BT
SEF027Y

OK or NG
HA
OK © GO TO 6.
NG © GO TO 8. SC

EL

IDX

EC-751
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

6 CHECK VACUUM HOSES AND TUBES

1. Turn ignition switch “OFF”.
2. Remove vacuum hoses between the swirl control valve actuator and the vacuum tank.
3. Check hoses and tubes for cracks, clogging, improper connection or disconnection.

SEF109L

OK or NG
OK © Repair or replace swirl control valve actuator.
NG © Repair or replace vacuum hoses or tubes.

7 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE CIRCUIT

With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON” and “OFF” alternately on CONSULT-II screen.

SEF069Y
4. Make sure that clicking sound is heard from the swirl control valve control solenoid valve.
OK or NG
OK © GO TO 11.
NG © GO TO 8.

EC-752
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. GI
2. Disconnect swirl control valve control solenoid valve harness connector.

MA

EM

LC

SEF272X
3. Turn ignition switch “ON”.
4. Check voltage between swirl control valve control solenoid valve terminal 1 and ground with CONSULT-II or tester. FE

CL

MT

AT

SEF619X
AX
OK or NG
OK © GO TO 10.
SU
NG © GO TO 9.

9 DETECT MALFUNCTIONING PART

BR
Check the following.
I Harness connectors M46, F44 ST
I 15A fuse
I Harness for open or short between swirl control valve control solenoid valve and fuse
© Repair harness or connectors. RS

10 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN BT
AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector. HA
3. Check harness continuity between ECM terminal 29 and swirl control valve control solenoid valve terminal 2. Refer to
Wiring Diagram.
Continuity should exist. SC
4. Also check harness for short to ground and short to power.
OK or NG EL
OK © GO TO 11.
NG © Repair open circuit, short to ground or short to power in harness connectors.
IDX

EC-753
 SWIRL CONTROL VALVE CONTROL SOLENOID
VALVE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

11 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE

With CONSULT-II
1. Reconnect the disconnected harness connectors.
2. Start engine and let it idle.
3. Remove vacuum hose connected to swirl control valve actuator.
4. Select “SWIRL CONT SOL/V” in “ACTIVE TEST” mode with CONSULT-II.
5. Touch “ON” and “OFF” on CONSULT-II screen.
6. Check vacuum existence and operation delay time under the following conditions.

SEF046Y

Without CONSULT-II
1. Reconnect ECM harness connector.
2. Remove vacuum hose connected to swirl control valve actuator.
3. Start engine and let it idle.
4. Apply 12V of direct current between swirl control valve control solenoid valve terminals 1 and 2.
5. Check vacuum existence and operation delay time under the following conditions.

SEF047Y

OK or NG
OK © GO TO 12.
NG © Replace intake manifold collector assembly.

12 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-754
 IGNITION SIGNAL WITHOUT EURO-OBD
Component Description

Component Description NFEC0286

IGNITION COIL & POWER TRANSISTOR NFEC0286S01
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
GI
on and off the ignition coil primary circuit. This on-off operation induces the proper high voltage in the coil
secondary circuit. MA

EM

LC

SEF274X
FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-755
 IGNITION SIGNAL WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0290

MEC434D

EC-756
IGNITION SIGNAL WITHOUT EURO-OBD
Wiring Diagram (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX
MEC435D

EC-757
 IGNITION SIGNAL WITHOUT EURO-OBD
Wiring Diagram (Cont’d)

MEC436D

EC-758
 IGNITION SIGNAL WITHOUT EURO-OBD
Wiring Diagram (Cont’d)

GI

MA

EM

LC

SEF860Y FE

CL

MT
Diagnostic Procedure NFEC0291
AT
1 INSPECTION START
Turn ignition switch “OFF”, and restart engine.
Is engine running? AX
Yes or No
Yes (With CONSULT-II) © GO TO 2. SU
Yes (Without CONSULT- © GO TO 3.
II)
BR
No © GO TO 4.

ST
2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II. RS
2. Make sure that all circuits do not produce a momentary engine speed drop.

BT

HA

SC

EL
SEF070Y

OK or NG
IDX
OK © INSPECTION END
NG © GO TO 13.

EC-759
 IGNITION SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK OVERALL FUNCTION

Without CONSULT-II
1. Let engine idle.
2. Read the voltage signal between ECM terminals 21, 22, 23, 30, 31, 32 and ground with an oscilloscope.
3. Verify that the oscilloscope screen shows the signal wave as shown below.

SEF071Y

OK or NG
OK © INSPECTION END
NG © GO TO 13.

4 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I

1. Turn ignition switch ON.
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.

SEF366X

OK or NG
OK © GO TO 5.
NG © Go to TROUBLE DIAGNOSIS FOR POWER SUPPLY, EC-567.

EC-760
 IGNITION SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II

1. Turn ignition switch OFF. GI
2. Disconnect condenser harness connector.

MA

EM

LC

SEF275X
3. Turn ignition switch ON.
4. Check voltage between condenser terminal 1 and ground with CONSULT-II or tester. FE

CL

MT

AT

SEF367X
AX
OK or NG
OK © GO TO 11.
SU
NG © GO TO 6.

6 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III

BR
1. Turn ignition switch OFF.
2. Disconnect ECM relay. ST

RS

BT

HA

SEF589PB
SC
3. Check harness continuity between ECM relay terminal 7 and condenser terminal 1. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
EL
OK or NG
OK © GO TO 8.
IDX
NG © GO TO 7.

EC-761
 IGNITION SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F18, E15
I Harness for open or short between ECM relay and condenser
© Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV

Check voltage between ECM relay terminal 6 and ground with CONSULT-II or tester.

SEF368X

OK or NG
OK © GO TO 10.
NG © GO TO 9.

9 DETECT MALFUNCTIONING PART

Check the following.
I 15A fuse
I Harness for open and short between ECM relay and fuse
© Repair or replace harness or connectors.

10 CHECK ECM RELAY

1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between ECM relay terminals 3 and 5, 6 and 7.

SEF296X

OK or NG
OK © GO TO 18.
NG © Replace ECM relay.

EC-762
 IGNITION SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

11 CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF. GI
2. Check harness continuity between condenser terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power. MA
OK or NG
OK © GO TO 12.
EM
NG © Repair open circuit or short to power in harness or connectors.

LC
12 CHECK CONDENSER
Check resistance between condenser terminals 1 and 2.

FE

CL

MT
SEF369X

OK or NG AT
OK © GO TO 13.
NG © Replace condenser. AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-763
 IGNITION SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

13 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V

1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
3. Disconnect ignition coil harness connector.

SEF274X
4. Turn ignition switch ON.
5. Check voltage between ignition coil terminal 3 and ground with CONSULT-II or tester.

SEF370X

OK or NG
OK © GO TO 15.
NG © GO TO 14.

14 DETECT MALFUNCTIONING PART

Check the harness for open or short between ignition coil and harness connector F18.
© Repair or replace harness or connectors.

15 CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.
2. Check harness continuity between ignition coil terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 16.
NG © Repair open circuit or short to power in harness or connectors.

EC-764
 IGNITION SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

16 CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector. GI
2. Check harness continuity between ECM terminals 21, 22, 23, 30, 31, 32 and ignition coil terminal 1. Refer to Wiring
Diagram.
Continuity should exist. MA
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 17.
EM
NG © Repair open circuit or short to ground or short to power in harness or connectors.
LC
17 CHECK IGNITION COIL WITH POWER TRANSISTOR
Check resistance between ignition coil terminals 2 and 3.

FE

CL

MT

SEF371X AT
OK or NG
OK © GO TO 18. AX
NG © Replace ignition coil with power transistor.

SU
18 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
BR
© INSPECTION END

ST

RS

BT

HA

SC

EL

IDX

EC-765
 A/T DIAGNOSIS COMMUNICATION
LINE WITHOUT EURO-OBD
Component Description

Component Description NFEC0361

The malfunction information related to A/T (Automatic Transmission) is transferred through the line (circuit)
from TCM (Transmission control module) to ECM.

EC-766
A/T DIAGNOSIS COMMUNICATION
LINE WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0365

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC078D
HA

SC

EL

IDX

SEF048YA

EC-767
 A/T DIAGNOSIS COMMUNICATION
LINE WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0366

1 CHECK OVERALL FUNCTION

1. Start engine and warm it up to normal operating temperature.
2. Check the voltage between ECM terminal 60 and ground.

SEF025Y

OK or NG
OK © INSPECTION END
NG © GO TO 2.

2 CHECK A/T DIAGNOSIS COMMUNICATION LINE INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and TCM (Transmission Control Module) harness connector.

SEF044Y

SEF271X
3. Check harness continuity between ECM terminal 60 and TCM terminal 15. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 3.
NG © Repair open circuit or short to ground or short to power in harness or connectors.

EC-768
 A/T DIAGNOSIS COMMUNICATION
LINE WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566. GI
© INSPECTION END

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-769
 PARK/NEUTRAL POSITION (PNP)
SWITCH WITHOUT EURO-OBD
Component Description

Component Description NFEC0367

When the gear position is “P” (A/T models only) or “N”, park/neutral
position (PNP) switch is “ON”.
ECM detects the position because the continuity of the line (the
“ON” signal) exists.
For A/T models, the park/neutral position (PNP) switch assembly
also includes a transmission range switch to detect selector lever
position.

AEC877A

CONSULT-II Reference Value in Data Monitor

Mode NFEC0368
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

Shift lever: “P” or “N” (A/T models)

ON
P/N POSI SW I Ignition switch: ON Neutral (M/T models)

Except above OFF

EC-770
PARK/NEUTRAL POSITION (PNP)
SWITCH WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0373

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC437D
HA

SC

EL

IDX

SEF635XC

EC-771
 PARK/NEUTRAL POSITION (PNP)
SWITCH WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0374

FOR M/T MODELS NFEC0374S01

1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes © GO TO 2.
No © GO TO 3.

2 CHECK OVERALL FUNCTION

With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT-II.
3. Check the “P/N POSI SW” signal under the following conditions.

SEF049Y

OK or NG
OK © INSPECTION END
NG © GO TO 4.

3 CHECK OVERALL FUNCTION

Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 44 and ground under the following conditions.

SEF050Y

OK or NG
OK © INSPECTION END
NG © GO TO 4.

EC-772
 PARK/NEUTRAL POSITION (PNP)
SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK PNP SWITCH GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”. GI
2. Disconnect park/neutral position (PNP) switch harness connector.

MA

EM

LC

AEC877A
3. Check harness continuity between PNP switch terminal 4 and engine ground. Refer to Wiring Diagram.
Continuity should exist. FE
4. Also check harness for short to power.
OK or NG
OK © GO TO 5.
CL
NG © Repair open circuit or short to power in harness or connectors.
MT
5 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector. AT
2. Check harness continuity between ECM terminal 44 and PNP switch terminal 3. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power. AX
OK or NG
OK © GO TO 6. SU
NG © Repair open circuit or short to ground or short to power in harness or connectors.

BR
6 CHECK PARK/NEUTRAL POSITION (PNP) SWITCH
Refer to MT-8, “Position Switch Check”.
ST
OK or NG
OK © GO TO 7.
RS
NG © Replace park/neutral position (PNP) switch.

BT
7 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END
HA

SC

EL

IDX

EC-773
 PARK/NEUTRAL POSITION (PNP)
SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)
FOR A/T MODELS =NFEC0374S02

1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes © GO TO 2.
No © GO TO 3.

2 CHECK OVERALL FUNCTION

With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT-II.
3. Check the “P/N POSI SW” signal under the following conditions.

SEF028Y

OK or NG
OK © INSPECTION END
NG © GO TO 4.

3 CHECK OVERALL FUNCTION

Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 44 and ground under the following conditions.

SEF029Y

OK or NG
OK © INSPECTION END
NG © GO TO 4.

EC-774
 PARK/NEUTRAL POSITION (PNP)
SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK PNP SWITCH GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”. GI
2. Disconnect park/neutral position (PNP) switch harness connector.

MA

EM

LC

SEF279X
3. Check harness continuity between PNP switch terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist. FE
4. Also check harness for short to power.
OK or NG
OK © GO TO 6.
CL
NG © GO TO 5.
MT
5 DETECT MALFUNCTIONING PART
Check the following. AT
I Harness connectors F10, F151
I Harness for open or short between park/neutral position (PNP) switch and engine ground
© Repair open circuit or short to power in harness or connectors.
AX

6 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT SU
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 44 and PNP switch terminal 1. Refer to Wiring Diagram. BR
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG ST
OK © GO TO 8.
NG © GO TO 7. RS

7 DETECT MALFUNCTIONING PART BT

Check the following.
I Harness connectors F10, F151
I Harness for open or short between ECM and park/neutral position (PNP) switch HA
© Repair open circuit or short to ground or short to power in harness or connectors.
SC
8 CHECK PARK/NEUTRAL POSITION (PNP) SWITCH
Refer to AT-205, “Diagnostic Procedure”. EL
OK or NG
OK © GO TO 9.
IDX
NG © Replace park/neutral position (PNP) switch.

EC-775
 PARK/NEUTRAL POSITION (PNP)
SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-776
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITHOUT EURO-OBD
Description

Description NFEC0596
SYSTEM DESCRIPTION NFEC0596S01
GI
ECM func-
Sensor Input Signal to ECM Actuator
tion
MA
Mass air flow sensor Amount of intake air

Throttle position sensor Throttle position

EM
Closed throttle position Throttle valve idle position
VIAS con-
Ignition switch Start signal VIAS control solenoid valve
trol LC
Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal)

Engine coolant temperature sensor Engine coolant temperature

FE

CL

MT

AT

AX

SU

BR
SEF599X
ST
When the engine is running at low or medium speed, the power
valve is fully closed. Under this condition, the effective suction port
length is equivalent to the total length of the intake manifold collec- RS
tor’s suction port including the intake valve. This long suction port
provides increased air intake which results in improved suction
efficiency and higher torque generation. BT
The surge tank and one-way valve are provided. When engine is
running at high speed, the ECM sends the signal to the VIAS con-
trol solenoid valve. This signal introduces the intake manifold HA
vacuum into the power valve actuator and therefore opens the
power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the
SC
length of the suction port provided independently for each cylinder.
This shortened port length results in enhanced engine output with
reduced suction resistance under high speeds.
EL

IDX

EC-777
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITHOUT EURO-OBD
Description (Cont’d)
COMPONENT DESCRIPTION NFEC0596S02
Power Valve NFEC0596S0201
The power valve is installed in intake manifold collector and used
to control the suction passage of the variable induction air control
system. It is set in the fully closed or fully opened position by the
power valve actuator operated by the vacuum stored in the surge
tank. The vacuum in the surge tank is controlled by the VIAS con-
trol solenoid valve.

SEF600X

VIAS Control Solenoid Valve NFEC0596S0202

The VIAS control solenoid valve cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF signals from
the ECM. When the solenoid is off, the vacuum signal from the
intake manifold is cut. When the ECM sends an ON signal the coil
pulls the plunger downward and feeds the vacuum signal to the
power valve actuator.

SEF288X

EC-778
VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0597

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC862C
HA

SC

EL

IDX

SEF636XB

EC-779
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0598

1 CHECK OVERALL FUNCTION

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.
3. Turn VIAS control solenoid valve “ON” and “OFF”, and make sure that power valve actuator rod moves.

SEC236C

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Rev engine quickly up to above 5,000 rpm and make sure that power valve actuator rod moves.

SEF052Y

OK or NG
OK © INSPECTION END
NG © GO TO 2.

EC-780
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Stop engine. GI
2. Disconnect VIAS control solenoid valve harness connector.

MA

EM

LC

SEF288X
3. Turn ignition switch “ON”.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester. FE

CL

MT

AT

SEF603X
AX
OK or NG
OK © GO TO 4.
SU
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

BR
Check the following.
I Harness connectors M46, F44 ST
I 15A fuse
I Harness continuity between fuse and VIAS control solenoid valve
© Repair harness or connectors. RS

4 CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT BT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 16 and terminal 2. Refer to Wiring Diagram. HA
Continuity should exist.
4. Also check harness for short to ground and short to power.
SC
OK or NG
OK © GO TO 5.
EL
NG © Repair open circuit or short to ground or short to power in harness or connectors.

IDX

EC-781
 VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 RETEST OVERALL FUNCTION

1. Reconnect harness connectors disconnected.
2. Perform Test No. 1 again.
OK or NG
OK © INSPECTION END
NG © GO TO 6.

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
OK or NG
OK © Replace VIAS control solenoid valve as intake manifold collector assembly.
NG © Repair or replace harness or connectors.

EC-782
 INJECTOR WITHOUT EURO-OBD
Component Description

Component Description NFEC0383

The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is GI
energized. The energized coil pulls the needle valve back and
allows fuel to flow through the injector into the intake manifold. The
amount of fuel injected depends upon the injection pulse duration. MA
Pulse duration is the length of time the injector remains open. The
ECM controls the injection pulse duration based on engine fuel
needs. EM

SEF812J LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC0384
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
I Engine: After warming up Idle 2.4 - 3.2 msec
INJ PULSE-B2 I Air conditioner switch: “OFF”
INJ PULSE-B1 I Shift lever: “N” CL
I No-load 2,000 rpm 1.9 - 2.8 msec

Idle 2.0 - 3.2 msec

B/FUEL SCHDL ditto
MT
2,000 rpm 1.4 - 2.6 msec

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-783
 INJECTOR WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0386

MEC863C

SEF862Y

EC-784
 INJECTOR WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0387

1 INSPECTION START GI
Turn ignition switch to “START”.
Is any cylinder ignited?
MA
Yes or No
Yes © GO TO 2.
No © GO TO 3.
EM

2 CHECK OVERALL FUNCTION LC

With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.

FE

CL

MT

AT
SEF070Y
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II AX
1. Start engine.
2. Listen to each injector operating sound.
SU

BR

ST

RS
MEC703B
Clicking noise should be heard. BT
OK or NG
OK © INSPECTION END HA
NG © GO TO 3.
SC

EL

IDX

EC-785
 INJECTOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 CHECK INJECTOR POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect injector harness connectors (bank 2) and harness connectors F43, F191 (bank 1).

SEF276X

SEF281X
3. Turn ignition switch “ON”.
4. Check voltage between injector terminal 1 and ground, harness connector F43 terminal 5 and ground with CONSULT-II
or tester.

SEF897X

OK or NG
OK © GO TO 5.
NG © GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Harness connectors F43, F191
I Fuse block (J/B) connector M19
I 10A fuse
I Harness for open or short between injector and fuse
I Harness for open or short between harness connector F43 and fuse
© Repair harness or connectors.

EC-786
 INJECTOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”. GI
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 103, 104, 107, harness connector F191 termi-
nals 6, 2, 1 and ECM terminals 101, 105, 102. Refer to Wiring Diagram. MA
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG EM
OK © GO TO 7.
NG © GO TO 6. LC

6 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F43, F191
I Harness for open or short between harness connector F191 and ECM FE
I Harness for open or short between ECM and injector
© Repair open circuit or short to ground or short to power in harness or connectors.
CL
7 CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT (BANK 1)
MT
1. Remove intake manifold collector.
2. Disconnect injector harness connectors (bank 1).
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
AT

AX
MTBL0359
Continuity should exist. SU
OK or NG
OK © GO TO 8. BR
NG © Repair open circuit or short to ground or short to power in harness or connectors.

ST
8 CHECK INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
RS

BT

HA

SC

SEF964XA
EL
OK or NG
OK © GO TO 9. IDX
NG © Replace injector.

EC-787
 INJECTOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-788
 START SIGNAL WITHOUT EURO-OBD
CONSULT-II Reference Value in Data Monitor Mode

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
NFEC0388
GI
MONITOR ITEM CONDITION SPECIFICATION
MA
START SIGNAL I Ignition switch: ON , START , ON OFF , ON , OFF

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-789
 START SIGNAL WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram =NFEC0390

MEC864C

SEF638XB

EC-790
 START SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0391

1 INSPECTION START GI
Do you have CONSULT-II?
Yes or No MA
Yes © GO TO 2.
No © GO TO 3.
EM
2 CHECK OVERALL FUNCTION
LC
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “START SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.

FE

CL

MT

SEF072Y
AT
OK or NG
OK © INSPECTION END
AX
NG © GO TO 4.

SU
3 CHECK OVERALL FUNCTION
Without CONSULT-II
Check voltage between ECM terminal 42 and ground under the following conditions. BR

ST

RS

BT

SEF362X HA
OK or NG
OK © INSPECTION END SC
NG © GO TO 4.

EL
4 CHECK STARTING SYSTEM
Turn ignition switch “OFF”, then turn it to “START”.
Does starter motor operate? IDX
Yes or No
Yes © GO TO 5.
No © Refer to SC-12, “STARTING SYSTEM”.

EC-791
 START SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

5 CHECK FUSE
1. Turn ignition switch “OFF”.
2. Disconnect 10A fuse.
3. Check if 10A fuse is OK.
OK or NG
OK © GO TO 6.
NG © Replace 10A fuse.

6 CHECK START SIGNAL INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Disconnect ignition switch harness connector.
3. Check harness continuity between ECM terminal 42 and fuse block, ignition switch and fuse block. Refer to Wiring Dia-
gram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors M46, F44
I Fuse block (J/B) connectors M17, E83
I Harness for open or short between ignition switch and fuse
I Harness for open or short between ECM and fuse
© Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-792
 FUEL PUMP WITHOUT EURO-OBD
System Description

System Description NFEC0392

Sensor Input Signal to ECM

ECM func-
Actuator GI
tion

Crankshaft position sensor (POS) Engine speed (POS signal)

Fuel pump
MA
Crankshaft position sensor (REF) Engine speed (REF signal) Fuel pump relay
control
Ignition switch Start signal
EM
The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine
startability. If the ECM receives a 120° signal from the crankshaft position sensor (REF), it knows that the LC
engine is rotating, and causes the pump to operate. If the 120° signal is not received when the ignition switch
is on, the engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving
safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn
controls the fuel pump.
Condition Fuel pump operation
FE
Ignition switch is turned to ON. Operates for 1 second.

Engine running and cranking Operates.

CL
When engine is stopped Stops in 1.5 seconds.

Except as shown above Stops.

MT
Component Description NFEC0393
The fuel pump with a fuel damper is an in-tank type (the pump and AT
damper are located in the fuel tank).
AX

SU

BR
SEF605X

CONSULT-II Reference Value in Data Monitor ST

Mode NFEC0394
Specification data are reference values.
RS
MONITOR ITEM CONDITION SPECIFICATION

I Ignition switch is turned to ON. (Operates for 1 second.)

FUEL PUMP RLY I Engine running and cranking
ON BT
Except as shown above OFF
HA

SC

EL

IDX

EC-793
 FUEL PUMP WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0396

MEC865C

SEC138C

EC-794
 FUEL PUMP WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0397

1 CHECK OVERALL FUNCTION GI

1. Turn ignition switch “ON”.
2. Pinch fuel feed hose with two fingers.
MA

EM

LC

SEC013C
Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned “ON”. FE
OK or NG
OK © INSPECTION END CL
NG © GO TO 2.
MT
2 CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”. AT
2. Disconnect fuel pump relay.

AX

SU

BR

ST
SEF284X
3. Turn ignition switch “ON”.
4. Check voltage between terminals 1, 5 and ground with CONSULT-II or tester.
RS

BT

HA

SC

SEF310Y
EL
OK or NG
OK © GO TO 4.
IDX
NG © GO TO 3.

EC-795
 FUEL PUMP WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 DETECT MALFUNCTIONING PART

Check the following.
I Fuse block (J/B) connector B5
I 10A fuse
I 15A fuse
I Harness for open or short between fuse and fuel pump relay
© Repair harness or connectors.

4 CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit and fuel pump harness connector.

SEF263X
3. Check harness continuity between fuel pump terminal 3 and body ground, fuel pump terminal 1 and fuel pump relay
terminal 3. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness for open or short between fuel pump relay and fuel pump
I Harness for open or short between fuel pump and body ground
© Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 28 (Models with immobilizer) or 24 (Models without immobilizer) and
fuel pump relay terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

EC-796
 FUEL PUMP WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

7 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness connectors B3, M6 (LHD models) or B4, M3 (RHD models)
I Harness connectors M81, F49
I Harness for open or short between ECM and fuel pump relay MA
© Repair open circuit or short to ground or short to power in harness or connectors.

EM
8 CHECK FUEL PUMP RELAY
With CONSULT-II
1. Reconnect fuel pump relay, fuel level sensor unit and fuel pump harness connector and ECM harness connector. LC
2. Turn ignition switch “ON”.
3. Turn fuel pump relay “ON” and “OFF” in “ACTIVE TEST” mode with CONSULT-II and check operating sound.

FE

CL

MT
SEF073Y
AT
Without CONSULT-II
Check continuity between terminals 3 and 5 under the following conditions.
AX

SU

BR

ST

SEF367Z
RS
OK or NG
OK © GO TO 9.
BT
NG © Replace fuel pump relay.

HA

SC

EL

IDX

EC-797
 FUEL PUMP WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

9 CHECK FUEL PUMP

1. Disconnect fuel level sensor unit and fuel pump harness connector.
2. Check resistance between fuel level sensor unit and fuel pump terminals 1 and 3.

SEF609X

OK or NG
OK © GO TO 10.
NG © Replace fuel pump.

10 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-798
 ELECTRONIC CONTROLLED ENGINE
MOUNT WITHOUT EURO-OBD
System Description

System Description NFEC0599

Sensor Input Signal to ECM

ECM func-
Actuator GI
tion

Crankshaft position sensor (POS) Engine speed (POS signal)

Engine
Electronic controlled engine
MA
Crankshaft position sensor (REF) Engine speed (REF signal) mount con-
mount
trol
Vehicle speed sensor Vehicle speed
EM
The ECM controls the engine mount operation corresponding to
the engine speed and the vehicle speed. The control system has LC
2-step control [soft/hard].
Vehicle condition Engine mount control

Idle (with vehicle stopped) Soft

Driving Hard
FE

CL

MT
CONSULT-II Reference Value in Data Monitor
Mode AT
NFEC0600
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION AX
Idle “IDLE”
ENGINE MOUNT I Engine: Running
2,000 rpm “TRVL” SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-799
 ELECTRONIC CONTROLLED ENGINE
MOUNT WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0602

MEC866C

SEF640XB

EC-800
 ELECTRONIC CONTROLLED ENGINE
MOUNT WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0603

1 CHECK THE OVERALL FUNCTION GI

With CONSULT-II
1. After warming up engine, run it at idle speed.
2. Shift selector lever to “D” range while depressing the brake pedal and pulling the parking brake control lever. MA
3. Perform “ENGINE MOUNTING” in “ACTIVE TEST” mode with CONSULT-II and check that the body vibration changes
according to switching the condition (With vehicle stopped).
EM

LC

FE
SEC237C
CL
Without CONSULT-II
1. After warming up engine, run it at idle speed.
2. Shift selector lever to “D” range while depressing the brake pedal and pulling the parking brake control lever.
MT
3. Disconnect front or rear electronic controlled engine mount harness connector when engine speed is more than 1,000
rpm.
AT
View with intake air duct
Front electronic controlled
engine mount harness connector
Rear electronic controlled AX
engine mount harness connector

SU

Radiator cap
Battery
BR

SEF285X
4. When returning engine speed to idle speed, check that the body vibration increases, compared with the condition of the
ST
above step 2 (With vehicle stopped).
OK or NG RS
OK © INSPECTION END
NG © GO TO 2. BT

HA

SC

EL

IDX

EC-801
 ELECTRONIC CONTROLLED ENGINE
MOUNT WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

2 CHECK ELECTRONIC CONTROLLED ENGINE MOUNT POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect front or rear electronic controlled engine mount harness connector.
3. Check voltage between electronic controlled engine mount terminal 3 and ground with CONSULT-II or tester.

SEF899X

OK or NG
OK © GO TO 4.
NG © GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E15, F18
I 15A fuse
I Harness for open or short between electronic controlled engine mount and battery
© Repair harness or connectors.

4 CHECK ELECTRONIC CONTROLLED ENGINE MOUNT OUTPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 49 and electronic controlled engine mount terminal 1, ECM terminal
50 and electronic controlled engine mount terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 5.
NG © Repair open circuit, short to ground or short to power in harness connectors.

5 CHECK ELECTRONIC CONTROLLED ENGINE MOUNT

Visually check front and rear electronic controlled engine mount.
OK or NG
OK © GO TO 6.
NG © Replace front or rear engine mount assembly.

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-802
 POWER STEERING OIL PRESSURE
SWITCH WITHOUT EURO-OBD
Component Description

Component Description NFEC0398

The power steering oil pressure switch is attached to the power
steering high-pressure tube and detects a power steering load. GI
When a power steering load is detected, it signals the ECM. The
ECM adjusts the IACV-AAC valve to increase the idle speed and
adjust for the increased load. MA

EM

SEF286X LC
CONSULT-II Reference Value in Data Monitor
Mode NFEC0399
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION FE
Steering wheel in neutral position
I Engine: After warming up, idle OFF
PW/ST SIGNAL (forward direction)
the engine CL
The steering wheel is fully turned. ON

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-803
 POWER STEERING OIL PRESSURE
SWITCH WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0401

MEC867C

SEF641XB

EC-804
 POWER STEERING OIL PRESSURE
SWITCH WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0402

1 INSPECTION START GI
Do you have CONSULT-II?
Yes or No MA
Yes © GO TO 2.
No © GO TO 3.
EM
2 CHECK OVERALL FUNCTION
LC
With CONSULT-II
1. Start engine.
2. Check “PW/ST SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.

FE

CL

MT

SEF311Y
AT
OK or NG
OK © INSPECTION END
AX
NG © GO TO 4.

SU
3 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine. BR
2. Check voltage between ECM terminal 47 and ground under the following conditions.

ST

RS

BT

HA
SEF363X

OK or NG
SC
OK © INSPECTION END
NG © GO TO 4.
EL

IDX

EC-805
 POWER STEERING OIL PRESSURE
SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK POWER STEERING OIL PRESSURE SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect power steering oil pressure switch harness connector.

SEF286X
3. Check harness continuity between power steering oil pressure switch terminal 1 and engine ground. Refer to Wiring
Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F17, E8 (RHD models)
I Harness for open or short between power steering oil pressure switch and body ground
© Repair open circuit or short to power in harness or connectors.

6 CHECK POWER STEERING OIL PRESSURE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 47 and power steering oil pressure switch terminal 2. Refer to Wiring
Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 8.
NG © GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors F17, E8 (RHD models)
I Harness for open or short between power steering oil pressure switch and ECM
© Repair open circuit or short to ground or short to power in harness or connectors.

EC-806
 POWER STEERING OIL PRESSURE
SWITCH WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK POWER STEERING OIL PRESSURE SWITCH

1. Disconnect power steering oil pressure switch harness connector then start engine. GI
2. Check continuity between power steering oil pressure switch terminals 1 and 2 under the following conditions.

MA

EM

LC

SEF364X

OK or NG
OK © GO TO 9. FE
NG © Replace power steering oil pressure switch.
CL
9 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566. MT
© INSPECTION END

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

EC-807
 REFRIGERANT PRESSURE SENSOR WITHOUT EURO-OBD
Description

Description NFEC0636
The refrigerant pressure sensor is installed at the liquid tank of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan sys-
tem.

SEF287X

SEF099X

EC-808
REFRIGERANT PRESSURE SENSOR WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0637

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

MEC868C
HA

SC

EL

IDX

SEF643XC

EC-809
 REFRIGERANT PRESSURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0638

1 CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION

1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch “ON”.
3. Check voltage between ECM terminal 81 and ground with CONSULT-II or tester.

SEC014C

OK or NG
OK © INSPECTION END
NG © GO TO 2.

2 CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

1. Turn A/C switch and blower switch “OFF”.
2. Stop engine.
3. Disconnect refrigerant pressure sensor harness connector.

SEF287X
4. Turn ignition switch “ON”.
5. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.

SEF618X

OK or NG
OK © GO TO 4.
NG © GO TO 3.

EC-810
 REFRIGERANT PRESSURE SENSOR WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

3 DETECT MALFUNCTIONING PART

Check the following. GI
I Harness connectors E15, F18
I Harness for open or short between ECM and refrigerant pressure sensor
© Repair harness or connectors. MA

4 CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT EM
1. Turn ignition switch “OFF”.
2. Check harness continuity between refrigerant pressure sensor terminal 3 and engine ground. Refer to Wiring Diagram.
Continuity should exist. LC
3. Also check harness for short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.
FE
5 DETECT MALFUNCTIONING PART
CL
Check the following.
I Harness connectors E8, F17
I Harness for open or short between ECM and refrigerant pressure sensor MT
I Harness for open or short between TCM (Transmission control module) and refrigerant pressure sensor
© Repair open circuit or short to power in harness or connectors.
AT
6 CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector. AX
2. Check harness continuity between ECM terminal 81 and refrigerant pressure sensor terminal 2. Refer to Wiring Dia-
gram.
Continuity should exist. SU
3. Also check harness for short to ground and short to power.
OK or NG BR
OK © GO TO 8.
NG © GO TO 7.
ST
7 DETECT MALFUNCTIONING PART
RS
Check the following.
I Harness connectors E8, F17
I Harness for open or short between ECM and refrigerant pressure sensor
BT
© Repair open circuit or short to ground or short to power in harness or connectors.

HA
8 CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-83, “Refrigerant pressure sensor”.
SC
OK or NG
OK © GO TO 9.
NG © Replace refrigerant pressure sensor.
EL

9 CHECK INTERMITTENT INCIDENT IDX

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-811
 ELECTRICAL LOAD SIGNAL WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0604

LHD MODELS NFEC0604S01

MEC834D

EC-812
ELECTRICAL LOAD SIGNAL WITHOUT EURO-OBD
Wiring Diagram (Cont’d)

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT
MEC835D

HA

SC

EL

IDX
SEF642XB

EC-813
 ELECTRICAL LOAD SIGNAL WITHOUT EURO-OBD
Wiring Diagram (Cont’d)
RHD MODELS NFEC0604S02

MEC839D

SEF642XB

EC-814
 ELECTRICAL LOAD SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure

Diagnostic Procedure NFEC0605

1 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I GI

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 52 and ground under the following conditions.
MA

EM

LC

SEF610X

OK or NG
FE
OK © GO TO 2.
NG © GO TO 3. CL

2 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II MT

Check voltage between ECM terminal 52 and ground under the following conditions.
AT

AX

SU

BR
SEF611XA

OK or NG ST
OK © INSPECTION END
NG © GO TO 7.
RS
3 CHECK REAR WINDOW DEFOGGER FUNCTION
BT
1. Start engine.
2. Turn “ON” the rear window defogger switch.
3. Check the rear windshield. Is the rear windshield heated up? HA
Yes or No
Yes © GO TO 4.
SC
No © Refer to EL-199, “Rear Window Defogger”.

EL

IDX

EC-815
 ELECTRICAL LOAD SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

4 CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between ECM terminal 52 and rear window defogger relay terminal 5.

SEF002Y
5. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 6.
NG © GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors B1, M5
I Harness connectors M46, F44
I Diode M35
I Harness for open and short between ECM and rear window defogger relay
© Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

7 CHECK HEADLAMP FUNCTION

1. Start engine.
2. Turn the lighting switch “ON” at 1st position with high beam.
3. Check that headlamps are illuminated.
OK or NG
OK (Models with con- © GO TO 8.
ventional type head-
lamp)
OK (Models with xenon © GO TO 10.
type headlamp)
NG © Refer to EL-41, “HEADLAMP — CONVENTIONAL TYPE” or EL-53, “HEADLAMP —
XENON TYPE”.

EC-816
 ELECTRICAL LOAD SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

8 CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1. Stop engine. GI
2. Disconnect ECM harness connector.
3. Disconnect headlamp RH relay (Models with auto light system), dimmer relay (Models without auto light system).
4. Check harness continuity between ECM terminal 52 and headlamp RH relay terminal 5 or dimmer relay terminal 5 MA
(LHD models), 7 (RHD models) under the following conditions.

EM

LC

SEF056Y
FE
5. Also check harness for short to ground and short to power.
OK or NG CL
OK © GO TO 12.
NG © GO TO 9. MT

9 DETECT MALFUNCTIONING PART

AT
Check the following.
I Harness connectors E81, M15
I Harness connectors M46, F44 AX
I Diode E79
I Harness for open and short between ECM and headlamp RH relay or dimmer relay
© Repair open circuit or short to ground or short to power in harness or connectors. SU

10 CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT BR

1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect headlamp RH relay (LHD models), headlamp LH relay (RHD models). ST
4. Check harness continuity between ECM terminal 52 and headlamp RH relay terminal 7 (Models with auto light system),
5 (Models without auto light system) or headlamp LH relay terminal 5 under the following conditions.
RS

BT

HA

SC
SEF057Y
5. Also check harness for short to ground and short to power. EL
OK or NG
OK © GO TO 12. IDX
NG © GO TO 11.

EC-817
 ELECTRICAL LOAD SIGNAL WITHOUT EURO-OBD
Diagnostic Procedure (Cont’d)

11 DETECT MALFUNCTIONING PART

Check the following.
I Harness connectors E81, M15
I Harness connectors M46, F44
I Diode E79
I Harness for open and short between ECM and headlamp RH relay or headlamp LH relay
© Repair open circuit or short to ground or short to power in harness or connectors.

12 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-566.
© INSPECTION END

EC-818
MIL & DATA LINK CONNECTORS WITHOUT EURO-OBD
Wiring Diagram

Wiring Diagram NFEC0407

GI

MA

EM

LC

FE

CL

MT

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

MEC840D

EC-819
 SERVICE DATA AND SPECIFICATIONS
(SDS) WITHOUT EURO-OBD
Fuel Pressure Regulator

Fuel Pressure Regulator NFEC0408

Fuel pressure at idling kPa (bar, kg/cm2, psi)

Vacuum hose is connected. Approximately 235 (2.35, 2.4, 34)

Vacuum hose is disconnected. Approximately 294 (2.94, 3.0, 43)

Idle Speed and Ignition Timing NFEC0409

Target idle speed*1 M/T: 625±50 rpm (VQ30DE)

No-load*2 (in “P” or N” position) M/T: 675±50 rpm (VQ20DE)
A/T: 700±50 rpm

Air conditioner: ON In “P” or N” position 825 rpm or more

In “P” or N” position 9°±5° BTDC (VQ20DE)

Ignition timing*1
15°±5° BTDC (VQ30DE)

Throttle position sensor idle position 0.15 - 0.85V

*1: Throttle position sensor harness connector connected

*2: Under the following conditions:
I Air conditioner switch: OFF
I Electric load: OFF (Lights, heater fan & rear window defogger)
I Steering wheel: Kept in straight-ahead position

Mass Air Flow Sensor NFEC0411

Supply voltage Battery voltage (11 - 14)V

Output voltage at idle 1.2 - 1.8*V

2.0 - 6.0 g·m/sec at idle*

Mass air flow (Using CONSULT-II)
7.0 - 20.0 g·m/sec at 2,500 rpm*

*: Engine is warmed up to normal operating temperature and running under no-load.

Engine Coolant Temperature Sensor NFEC0412

Temperature °C (°F) Resistance kΩ

20 (68) 2.1 - 2.9

50 (122) 0.68 - 1.00

90 (194) 0.236 - 0.260

EGR Temperature Sensor NFEC0413

EGR temperature °C (°F) Voltage V Resistance MΩ

0 (32) 4.61 0.68 - 1.11

50 (122) 2.53 0.09 - 0.12

100 (212) 0.87 0.017 - 0.024

Heated Oxygen Sensor 1 Heater (Front) NFEC0414

Resistance [at 25°C (77°F)] 2.3 - 4.3Ω

Fuel Pump NFEC0415

Resistance [at 25°C (77°F)] 0.2 - 5.0Ω

IACV-AAC Valve NFEC0416

Resistance [at 20°C (77°F)] Approximately 22Ω

EC-820
 SERVICE DATA AND SPECIFICATIONS
(SDS) WITHOUT EURO-OBD
Injector

Injector NFEC0417

Resistance [at 20°C (68°F)] 14 - 15Ω GI

Resistor NFEC0418
MA
Resistance [at 25°C (77°F)] Approximately 2.2 kΩ

Throttle Position Sensor NFEC0419

EM
Voltage
Throttle valve conditions
(at normal operating temperature,
engine off, ignition switch ON,
LC
throttle opener disengaged)

Completely closed (a) 0.15 - 0.85V

Partially open Between (a) and (b)

Completely open (b) 3.5 - 4.7V FE

Calculated Load Value NFEC0420
CL
Calculated load value % (Using CONSULT-II)

At idle 14.0 - 33.0

MT
At 2,500 rpm 12.0 - 25.0

Intake Air Temperature Sensor AT

NFEC0421

Temperature °C (°F) Resistance kΩ

20 (68) 2.1 - 2.9

AX
80 (176) 0.27 - 0.38
SU
Heated Oxygen Sensor 2 Heater (Rear) NFEC0422

Resistance [at 25°C (77°F)] 2.3 - 4.3Ω BR

Crankshaft Position Sensor (REF) NFEC0423
ST
Resistance [at 20°C (68°F)] 470 - 570Ω

Fuel Tank Temperature Sensor RS

NFEC0424

Temperature °C (°F) Resistance kΩ

BT
20 (68) 2.3 - 2.7

50 (122) 0.79 - 0.90

HA
Camshaft Position Sensor (PHASE) NFEC0639

HITACHI make 1,440 - 7,760Ω SC

Resistance [at 20°C (68°F)]
MITSUBISHI make 2,090 - 2,550Ω

EL

IDX

EC-821
NOTES