ENGINE CONTROL SYSTEM

SECTION EC
MODIFICATION NOTICE:
+ TB48DE engine models have been applied to Europe.

CONTENTS
TB48DE A/T Idle Air Volume Learning ......................................... 31
Fuel Pressure Check ............................................... 34
ENGINE AND EMISSION CONTROL OVERALL......... 7
Injector Removal and Installation ............................ 35
Circuit Diagram .......................................................... 7
ON BOARD DIAGNOSTIC (OBD) .............................. 37
Introduction .............................................................. 37
TB48DE A/T (WITH EURO-OBD) Two Trip Detection Logic......................................... 37
INDEX FOR DTC ........................................................... 9 Emission-related Diagnostic Information ................. 38
Alphabetical Index ..................................................... 9 NATS (Nissan Anti-theft System) ............................ 50
DTC No. Index......................................................... 12 Malfunction Indicator (MI) ........................................ 51
PRECAUTIONS ........................................................... 15 OBD System Operation Chart ................................. 54
Precautions for Supplemental Restraint System TROUBLE DIAGNOSIS ........................................... 59
(SRS) ″AIR BAG″ and ″SEAT BELT Trouble Diagnosis Introduction................................ 59
PRE-TENSIONER″ .................................................. 15 DTC Inspection Priority Chart.................................. 64
On Board Diagnostic (OBD) System of Engine Fail-safe Chart ......................................................... 65
and A/T .................................................................... 15 Basic Inspection....................................................... 66
Precaution................................................................ 16 Symptom Matrix Chart............................................. 71
Wiring Diagrams and Trouble Diagnosis................. 19 Engine Control Component Parts Location............. 74
PREPARATION ........................................................... 20 Circuit Diagram ........................................................ 78
Special Service Tools .............................................. 20 ECM Harness Connector Terminal Layout ............. 80
Commercial Service Tools....................................... 20 ECM Terminals and Reference Value..................... 80
ENGINE CONTROL..................................................... 22 CONSULT-II Function.............................................. 89
System Diagram ...................................................... 22 Generic Scan Tool (GST) Function....................... 101
Vacuum Hose Drawing............................................ 23 CONSULT-II Reference Value in Data Monitor
System Chart ........................................................... 24 Mode ...................................................................... 103
Multiport Fuel Injection (MFI) System ..................... 24 Major Sensor Reference Graph in Data Monitor
Electronic Ignition (EI) System ................................ 27 Mode ...................................................................... 106
Air Conditioning Cut Control.................................... 28 TROUBLE DIAGNOSIS - SPECIFICATION
Fuel Cut Control (at No Load and High Engine VALUE ....................................................................... 108
Speed) ..................................................................... 28 Description ............................................................. 108
CAN Communication ............................................... 29 Testing condition.................................................... 108
BASIC SERVICE ......................................................... 30 Inspection Procedure............................................. 108
Idle Speed and Ignition Timing Check .................... 30 Diagnostic Procedure ............................................ 109
Accelerator Pedal Released Position Learning....... 31 TROUBLE DIAGNOSIS FOR INTERMITTENT
Throttle Valve Closed Position Learning ................. 31 INCIDENT................................................................... 112
 ENGINE CONTROL SYSTEM

Description ............................................................. 112 Component Description ......................................... 157

Diagnostic Procedure ............................................ 112 CONSULT-II Reference Value in Data Monitor
POWER SUPPLY CIRCUIT FOR ECM..................... 113 Mode ...................................................................... 157
Wiring Diagram ...................................................... 113 On Board Diagnosis Logic..................................... 157
Diagnostic Procedure ............................................ 116 DTC Confirmation Procedure ................................ 158
Component Inspection........................................... 120 Wiring Diagram ...................................................... 159
DTC U1000 CAN COMMUNICATION LINE ............. 121 Diagnostic Procedure ............................................ 160
Description ............................................................. 121 Component Inspection........................................... 162
On Board Diagnosis Logic..................................... 121 DTC P0132, P0152 HO2S1 ....................................... 163
DTC Confirmation Procedure ................................ 121 Component Description ......................................... 163
Wiring Diagram ...................................................... 122 CONSULT-II Reference Value in Data Monitor
Diagnostic Procedure ............................................ 123 Mode ...................................................................... 163
DTC P0031, P0032, P0051, P0052 HO2S1 On Board Diagnosis Logic..................................... 163
HEATER..................................................................... 124 DTC Confirmation Procedure ................................ 164
Description ............................................................. 124 Wiring Diagram ...................................................... 165
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ............................................ 168
Mode ...................................................................... 124 Component Inspection........................................... 170
On Board Diagnosis Logic..................................... 124 DTC P0133, P0153 HO2S1 ....................................... 172
DTC Confirmation Procedure ................................ 124 Component Description ......................................... 172
Wiring Diagram ...................................................... 126 CONSULT-II Reference Value in Data Monitor
Diagnostic Procedure ............................................ 129 Mode ...................................................................... 172
Component Inspection........................................... 131 On Board Diagnosis Logic..................................... 172
DTC P0037, P0038, P0057, P0058 HO2S2 DTC Confirmation Procedure ................................ 173
HEATER..................................................................... 132 Overall Function Check ......................................... 174
Description ............................................................. 132 Wiring Diagram ...................................................... 175
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ............................................ 178
Mode ...................................................................... 132 Component Inspection........................................... 183
On Board Diagnosis Logic..................................... 132 DTC P0134, P0154 HO2S1 ....................................... 185
DTC Confirmation Procedure ................................ 132 Component Description ......................................... 185
Wiring Diagram ...................................................... 134 CONSULT-II Reference Value in Data Monitor
Diagnostic Procedure ............................................ 137 Mode ...................................................................... 185
Component Inspection........................................... 139 On Board Diagnosis Logic..................................... 185
DTC P0102, P0103 MAF SENSOR........................... 140 DTC Confirmation Procedure ................................ 186
Component Description ......................................... 140 Overall Function Check ......................................... 187
CONSULT-II Reference Value in Data Monitor Wiring Diagram ...................................................... 188
Mode ...................................................................... 140 Diagnostic Procedure ............................................ 191
On Board Diagnosis Logic..................................... 140 Component Inspection........................................... 193
DTC Confirmation Procedure ................................ 140 DTC P0138, P0158 HO2S2 ....................................... 195
Wiring Diagram ...................................................... 142 Component Description ......................................... 195
Diagnostic Procedure ............................................ 143 CONSULT-II Reference Value in Data Monitor
Component Inspection........................................... 146 Mode ...................................................................... 195
DTC P0112, P0113 IAT SENSOR............................. 147 On Board Diagnosis Logic..................................... 195
Component Description ......................................... 147 DTC Confirmation Procedure ................................ 196
On Board Diagnosis Logic..................................... 147 Wiring Diagram ...................................................... 197
DTC Confirmation Procedure ................................ 147 Diagnostic Procedure ............................................ 200
Wiring Diagram ...................................................... 149 Component Inspection........................................... 203
Diagnostic Procedure ............................................ 150 DTC P0139, P0159 HO2S2 ....................................... 205
Component Inspection........................................... 151 Component Description ......................................... 205
DTC P0117, P0118 ECT SENSOR ........................... 152 CONSULT-II Reference Value in Data Monitor
Component Description ......................................... 152 Mode ...................................................................... 205
On Board Diagnosis Logic..................................... 152 On Board Diagnosis Logic..................................... 205
DTC Confirmation Procedure ................................ 153 DTC Confirmation Procedure ................................ 206
Wiring Diagram ...................................................... 154 Overall Function Check ......................................... 207
Diagnostic Procedure ............................................ 155 Wiring Diagram ...................................................... 209
Component Inspection........................................... 156 Diagnostic Procedure ............................................ 212
DTC P0122, P0123 TP SENSOR.............................. 157 Component Inspection........................................... 215

EC-2
 ENGINE CONTROL SYSTEM

DTC P0171, P0174 FUEL INJECTION SYSTEM DTC P0444, P0445 EVAP CANISTER PURGE
FUNCTION ................................................................. 218 VOLUME CONTROL SOLENOID VALVE ................ 269
On Board Diagnosis Logic..................................... 218 Description ............................................................. 269
DTC Confirmation Procedure ................................ 218 CONSULT-II Reference Value in Data Monitor
Wiring Diagram ...................................................... 220 Mode ...................................................................... 269
Diagnostic Procedure ............................................ 222 On Board Diagnosis Logic..................................... 269
DTC P0172, P0175 FUEL INJECTION SYSTEM DTC Confirmation Procedure ................................ 270
FUNCTION ................................................................. 227 Wiring Diagram ...................................................... 271
On Board Diagnosis Logic..................................... 227 Diagnostic Procedure ............................................ 273
DTC Confirmation Procedure ................................ 227 Component Inspection........................................... 275
Wiring Diagram ...................................................... 229 DTC P0500 VSS ........................................................ 276
Diagnostic Procedure ............................................ 231 Description ............................................................. 276
DTC P0222, P0223 TP SENSOR.............................. 235 On Board Diagnosis Logic..................................... 276
Component Description ......................................... 235 DTC Confirmation Procedure ................................ 276
CONSULT-II Reference Value in Data Monitor Overall Function Check ......................................... 277
Mode ...................................................................... 235 Diagnostic Procedure ............................................ 277
On Board Diagnosis Logic..................................... 235 DTC P0550 PSP SENSOR........................................ 278
DTC Confirmation Procedure ................................ 235 Component Description ......................................... 278
Wiring Diagram ...................................................... 237 CONSULT-II Reference Value in Data Monitor
Diagnostic Procedure ............................................ 238 Mode ...................................................................... 278
Component Inspection........................................... 240 On Board Diagnosis Logic..................................... 278
DTC P0300 - P0306 MULTIPLE CYLINDER DTC Confirmation Procedure ................................ 278
MISFIRE, NO. 1 - 6 CYLINDER MISFIRE ................ 241 Wiring Diagram ...................................................... 279
On Board Diagnosis Logic..................................... 241 Diagnostic Procedure ............................................ 280
DTC Confirmation Procedure ................................ 241 Component Inspection........................................... 282
Diagnostic Procedure ............................................ 242 DTC P0605 ECM ....................................................... 283
DTC P0327, P0328, P0332, P0333 KS..................... 247 Component Description ......................................... 283
Component Description ......................................... 247 On Board Diagnosis Logic..................................... 283
On Board Diagnosis Logic..................................... 247 DTC Confirmation Procedure ................................ 283
DTC Confirmation Procedure ................................ 247 Diagnostic Procedure ............................................ 285
Wiring Diagram ...................................................... 248 DTC P0650 MI ........................................................... 286
Diagnostic Procedure ............................................ 249 Component Description ......................................... 286
Component Inspection........................................... 250 On Board Diagnosis Logic..................................... 286
DTC P0335 CKP SENSOR (OBD)............................ 251 DTC Confirmation Procedure ................................ 286
Component Description ......................................... 251 Wiring Diagram ...................................................... 287
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ............................................ 288
Mode ...................................................................... 251 DTC P1065 ECM POWER SUPPLY ......................... 290
On Board Diagnosis Logic..................................... 251 Component Description ......................................... 290
DTC Confirmation Procedure ................................ 251 On Board Diagnosis Logic..................................... 290
Wiring Diagram ...................................................... 253 DTC Confirmation Procedure ................................ 290
Diagnostic Procedure ............................................ 254 Wiring Diagram ...................................................... 291
Component Inspection........................................... 256 Diagnostic Procedure ............................................ 292
DTC P0340 CAMSHAFT POSITION......................... 257 DTC P1111 IVT CONTROL SOLENOID VALVE...... 294
Component Description ......................................... 257 Description ............................................................. 294
ECM Terminals and Reference Value................... 257 Operation ............................................................... 294
On Board Diagnosis Logic..................................... 258 CONSULT-II Reference Value in Data Monitor
DTC Confirmation Procedure ................................ 258 Mode ...................................................................... 295
Wiring Diagram ...................................................... 260 On Board Diagnosis Logic..................................... 295
Diagnostic Procedure ............................................ 261 DTC Confirmation Procedure ................................ 295
Component Inspection........................................... 262 Wiring Diagram ...................................................... 296
DTC P0420, P0430 THREE WAY CATALYST Diagnostic Procedure ............................................ 297
FUNCTION ................................................................. 264 Component Inspection........................................... 298
On Board Diagnosis Logic..................................... 264 DTC P1121 ELECTRIC THROTTLE CONTROL
DTC Confirmation Procedure ................................ 264 ACTUATOR ............................................................... 299
Overall Function Check ......................................... 265 Component Description ......................................... 299
Diagnostic Procedure ............................................ 266 On Board Diagnosis Logic..................................... 299

EC-3
 ENGINE CONTROL SYSTEM

DTC Confirmation Procedure ................................ 299 Component Description ......................................... 348

Diagnostic Procedure ............................................ 300 CONSULT-II Reference Value in Data Monitor
DTC P1122 ELECTRIC THROTTLE CONTROL Mode ...................................................................... 348
FUNCTION ................................................................. 301 On Board Diagnosis Logic..................................... 348
Description ............................................................. 301 DTC Confirmation Procedure ................................ 349
On Board Diagnosis Logic..................................... 301 Overall Function Check ......................................... 350
DTC Confirmation Procedure ................................ 301 Wiring Diagram ...................................................... 352
Wiring Diagram ...................................................... 302 Diagnostic Procedure ............................................ 355
Diagnostic Procedure ............................................ 303 Component Inspection........................................... 358
Component Inspection........................................... 308 DTC P1217 ENGINE OVER TEMPERATURE
DTC P1124, P1126 THROTTLE CONTROL (OVERHEAT) ............................................................. 361
MOTOR RELAY......................................................... 309 System Description................................................ 361
Component Description ......................................... 309 Operation ............................................................... 361
CONSULT-II Reference Value in Data Monitor CONSULT-II Reference Value In Data Monitor
Mode ...................................................................... 309 Mode ...................................................................... 361
On Board Diagnosis Logic..................................... 309 ECM Terminals and Reference Value................... 362
DTC Confirmation Procedure ................................ 309 On Board Diagnosis Logic..................................... 362
Wiring Diagram ...................................................... 311 Overall Function Check ......................................... 363
Diagnostic Procedure ............................................ 312 Wiring Diagram ...................................................... 364
Component Inspection........................................... 314 Diagnostic Procedure ............................................ 365
DTC P1128 THROTTLE CONTROL MOTOR........... 315 Main 12 Causes of Overheating............................ 370
Component Description ......................................... 315 Component Inspection........................................... 371
On Board Diagnosis Logic..................................... 315 DTC P1225 TP SENSOR .......................................... 372
DTC Confirmation Procedure ................................ 315 Component Description ......................................... 372
Wiring Diagram ...................................................... 316 On Board Diagnosis Logic..................................... 372
Diagnostic Procedure ............................................ 317 DTC Confirmation Procedure ................................ 372
Component Inspection........................................... 319 Diagnostic Procedure ............................................ 373
DTC P1143, P1163 HO2S1 ....................................... 320 DTC P1226 TP SENSOR .......................................... 374
Component Description ......................................... 320 Component Description ......................................... 374
CONSULT-II Reference Value in Data Monitor On Board Diagnosis Logic..................................... 374
Mode ...................................................................... 320 DTC Confirmation Procedure ................................ 374
On Board Diagnosis Logic..................................... 320 Diagnostic Procedure ............................................ 375
DTC Confirmation Procedure ................................ 321 DTC P1229 SENSOR POWER ................................. 376
Overall Function Check ......................................... 322 On Board Diagnosis Logic..................................... 376
Diagnostic Procedure ............................................ 322 DTC Confirmation Procedure ................................ 376
Component Inspection........................................... 325 Wiring Diagram ...................................................... 377
DTC P1144, P1164 HO2S1 ....................................... 327 Diagnostic Procedure ............................................ 378
Component Description ......................................... 327 DTC P1336 CKP SENSOR (OBD)............................ 381
CONSULT-II Reference Value in Data Monitor Component Description ......................................... 381
Mode ...................................................................... 327 ECM Terminals and Reference Value................... 381
On Board Diagnosis Logic..................................... 327 On Board Diagnosis Logic..................................... 382
DTC Confirmation Procedure ................................ 328 DTC Confirmation Procedure ................................ 382
Overall Function Check ......................................... 329 Wiring Diagram ...................................................... 383
Diagnostic Procedure ............................................ 329 Diagnostic Procedure ............................................ 384
Component Inspection........................................... 332 DTC P1706 PNP SWITCH......................................... 388
DTC P1146, P1166 HO2S2 ....................................... 335 Component Description ......................................... 388
Component Description ......................................... 335 CONSULT-II Reference Value in Data Monitor
CONSULT-II Reference Value in Data Monitor Mode ...................................................................... 388
Mode ...................................................................... 335 On Board Diagnosis Logic..................................... 388
On Board Diagnosis Logic..................................... 335 DTC Confirmation Procedure ................................ 388
DTC Confirmation Procedure ................................ 336 Overall Function Check ......................................... 389
Overall Function Check ......................................... 337 Wiring Diagram ...................................................... 390
Wiring Diagram ...................................................... 339 Diagnostic Procedure ............................................ 392
Diagnostic Procedure ............................................ 342 DTC P1805 BRAKE SWITCH ................................... 395
Component Inspection........................................... 345 Description ............................................................. 395
DTC P1147, P1167 HO2S2 ....................................... 348

EC-4
 ENGINE CONTROL SYSTEM

CONSULT-II Reference Value in Data Monitor ECM Terminals and Reference Value................... 447
Mode ...................................................................... 395 Wiring Diagram ...................................................... 448
On Board Diagnosis Logic..................................... 395 Diagnostic Procedure ............................................ 449
DTC Confirmation Procedure ................................ 395 START SIGNAL......................................................... 450
Wiring Diagram ...................................................... 396 CONSULT-II Reference Value in Data Monitor
Diagnostic Procedure ............................................ 397 Mode ...................................................................... 450
Component Inspection........................................... 399 ECM Terminals and Reference Value................... 450
DTC P2122, P2123 APP SENSOR ........................... 401 Wiring Diagram ...................................................... 451
Component Description ......................................... 401 Diagnostic Procedure ............................................ 452
CONSULT-II Reference Value in Data Monitor INJECTOR CIRCUIT.................................................. 453
Mode ...................................................................... 401 Component Description ......................................... 453
On Board Diagnosis Logic..................................... 401 CONSULT-II Reference Value in Data Monitor
DTC Confirmation Procedure ................................ 402 Mode ...................................................................... 453
Wiring Diagram ...................................................... 403 Wiring Diagram ...................................................... 454
Diagnostic Procedure ............................................ 405 Diagnostic Procedure ............................................ 455
Component Inspection........................................... 407 Component Inspection........................................... 458
DTC P2127, P2128 APP SENSOR ........................... 408 FUEL PUMP............................................................... 459
Component Description ......................................... 408 System Description................................................ 459
CONSULT-II Reference Value in Data Monitor Component Description ......................................... 459
Mode ...................................................................... 408 CONSULT-II Reference Value in Data Monitor
On Board Diagnosis Logic..................................... 408 Mode ...................................................................... 459
DTC Confirmation Procedure ................................ 409 ECM Terminals and Reference Value................... 460
Wiring Diagram ...................................................... 410 Wiring Diagram ...................................................... 461
Diagnostic Procedure ............................................ 411 Diagnostic Procedure ............................................ 462
Component Inspection........................................... 414 Component Inspection........................................... 464
DTC P2135 TP SENSOR .......................................... 415 REFRIGERANT PRESSURE SENSOR .................... 465
Component Description ......................................... 415 Component Description ......................................... 465
CONSULT-II Reference Value in Data Monitor Wiring Diagram ...................................................... 466
Mode ...................................................................... 415 Diagnostic Procedure ............................................ 467
On Board Diagnosis Logic..................................... 415 ELECTRICAL LOAD SIGNAL................................... 470
DTC Confirmation Procedure ................................ 416 Description ............................................................. 470
Wiring Diagram ...................................................... 417 CONSULT-II Reference Value in Data Monitor
Diagnostic Procedure ............................................ 418 Mode ...................................................................... 470
Component Inspection........................................... 420 Wiring Diagram ...................................................... 471
DTC P2138 APP SENSOR........................................ 421 Diagnostic Procedure ............................................ 473
Component Description ......................................... 421 DATA LINK CONNECTORS ..................................... 477
CONSULT-II Reference Value in Data Monitor Wiring Diagram ...................................................... 477
Mode ...................................................................... 421 EVAPORATIVE EMISSION ....................................... 478
On Board Diagnosis Logic..................................... 421 Description ............................................................. 478
DTC Confirmation Procedure ................................ 422 Component Inspection........................................... 480
Wiring Diagram ...................................................... 423 POSITIVE CRANKCASE VENTILATION.................. 481
Diagnostic Procedure ............................................ 425 Description ............................................................. 481
Component Inspection........................................... 427 Component Inspection........................................... 482
IGNITION SIGNAL..................................................... 428 SERVICE DATA AND SPECIFICATIONS ................ 483
Component Description ......................................... 428 Fuel Pressure Regulator........................................ 483
Wiring Diagram ...................................................... 429 Idle Speed and Ignition Timing.............................. 483
Diagnostic Procedure ............................................ 435 Mass Air Flow Sensor ........................................... 483
Component Inspection........................................... 441 Engine Coolant Temperature Sensor.................... 483
SNOW MODE SWITCH ......................................... 442 Heated Oxygen Sensor 1 ...................................... 483
Component Description ......................................... 442 Heated Oxygen Sensor 2 ...................................... 483
ECM Terminals and Reference Value................... 442 Fuel Pump ............................................................. 483
Wiring Diagram ...................................................... 443 EVAP Canister Purge Volume Control Solenoid
Diagnostic Procedure ............................................ 444 Valve ...................................................................... 484
VARIABLE INDUCTION AIR CONTROL SYSTEM Injector ................................................................... 484
(VIAS)......................................................................... 446 Ignition Coil with Power Transistor........................ 484
Description ............................................................. 446 Condenser ............................................................. 484

EC-5
 ENGINE CONTROL SYSTEM

Throttle Control Motor............................................ 484 Diagnostic Procedure ............................................ 490

Component Inspection........................................... 495
ZD30DDTi Main 12 Causes of Overheating............................ 496
DTC 0402 P9zFUEL TEMP SEN ............................... 497
ENGINE AND EMISSION CONTROL OVERALL
Wiring Diagram ...................................................... 497
SYSTEM..................................................................... 485
DTC 0403 ACCEL POS SENSOR ............................ 498
Circuit Diagram ...................................................... 485
Wiring Diagram ...................................................... 498
TROUBLE DIAGNOSIS FOR POWER SUPPLY...... 486
DTC 0902 ECM RLY ................................................. 499
Main Power Supply and Ground Circuit................ 486
Wiring Diagram ...................................................... 499
DTC 0102 MASS AIR FLOW SEN............................ 487
DTC 1003 EGR VOLUME CONT/V........................... 500
Wiring Diagram ...................................................... 487
Wiring Diagram ...................................................... 500
DTC 0104 VEHICLE SPEED SEN ............................ 488
MI (MIL) & DATA LINK CONNECTORS .................. 501
Wiring Diagram ...................................................... 488
Wiring Diagram ...................................................... 501
DTC 0208 OVER HEAT............................................. 489
Wiring Diagram ...................................................... 489

When you read wiring diagrams:

+ Read GI section, “HOW TO READ WIRING DIAGRAMS”.
+ See EL section, “POWER SUPPLY ROUTING” for power distribution circuit.
When you perform trouble diagnoses, read GI section, “HOW TO FOLLOW FLOW CHART IN
TROUBLE DIAGNOSES” and “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL
INCIDENT”.

EC-6
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM TB48DE A/T

Circuit Diagram

TEC241M

EC-7
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM TB48DE A/T
Circuit Diagram (Cont’d)

TEC372M

EC-8
 INDEX FOR DTC TB48DE A/T (WITH EURO-OBD)

Alphabetical Index
Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Type approval number” on
the identification plate. Refer to GI section.
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer
to EC-121, “DTC U1000 CAN COMMUNICATION LINE”.
x: Applicable —: Not applicable

DTC*1
Items
CONSULT-II Trip MI lighting up Reference page
(CONSULT-II screen terms) ECM*3
GST*2
APP SEN 1/CIRC P2122 2122 1 x EC-401
APP SEN 1/CIRC P2123 2123 1 x EC-401
APP SEN 2/CIRC P2127 2127 1 x EC-408
APP SEN 2/CIRC P2128 2128 1 x EC-408
APP SENSOR P2138 2138 1 x EC-421
BRAKE SW/CIRCUIT P1805 1805 2 — EC-395
CAN COMM CIRCUIT U1000 1000*5 1 x EC-121
CKP SEN/CIRCUIT P0335 0335 2 x EC-251
CKP SENSOR (COG) P1336 1336 2 x EC-381
CMP SEN/CIRC-B1 P0340 0340 2 x EC-257
CTP LEARNING P1225 1225 2 — EC-372
CTP LEARNING P1226 1226 2 — EC-374
CYL 1 MISFIRE P0301 0301 2 x EC-241
CYL 2 MISFIRE P0302 0302 2 x EC-241
CYL 3 MISFIRE P0303 0303 2 x EC-241
CYL 4 MISFIRE P0304 0304 2 x EC-241
CYL 5 MISFIRE P0305 0305 2 x EC-241
CYL 6 MISFIRE P0306 0306 2 x EC-241
ECM P0605 0605 1 or 2 x or — EC-283
ECM BACK UP/CIRC P1065 1065 2 x EC-290
ECT SEN/CIRCUIT P0117 0117 1 x EC-152
ECT SEN/CIRCUIT P0118 0118 1 x EC-152
ENG OVER TEMP P1217 1217 1 x EC-361
ETC ACTR P1121 1121 1 or 2 x EC-299
ETC FUNCTION/CIRC P1122 1122 1 x EC-301
ETC MOT P1128 1128 1 x EC-315
ETC MOT PWR P1124 1124 1 x EC-309
ETC MOT PWR P1126 1126 1 x EC-309
FUEL SYS-LEAN-B1 P0171 0171 2 x EC-218
FUEL SYS-LEAN-B2 P0174 0174 2 x EC-218
FUEL SYS-RICH-B1 P0172 0172 2 x EC-227
FUEL SYS-RICH-B2 P0175 0175 2 x EC-227
HO2S1 (B1) P0132 0132 2 x EC-163
HO2S1 (B1) P0133 0133 2 x EC-172
HO2S1 (B1) P0134 0134 2 x EC-172

EC-9
 INDEX FOR DTC TB48DE A/T (WITH EURO-OBD)
Alphabetical Index (Cont’d)
DTC*1
Items
CONSULT-II Trip MI lighting up Reference page
(CONSULT-II screen terms) ECM*3
GST*2
HO2S1 (B1) P1143 1143 2 x EC-320
HO2S1 (B1) P1144 1144 2 x EC-327
HO2S1 (B2) P0152 0152 2 x EC-163
HO2S1 (B2) P0153 0153 2 x EC-172
HO2S1 (B2) P0154 0154 2 x EC-172
HO2S1 (B2) P1163 1163 2 x EC-320
HO2S1 (B2) P1164 1164 2 x EC-327
HO2S1 HTR (B1) P0031 0031 2 x EC-124
HO2S1 HTR (B1) P0032 0032 2 x EC-124
HO2S1 HTR (B2) P0051 0051 2 x EC-124
HO2S1 HTR (B2) P0052 0052 2 x EC-124
HO2S2 (B1) P0138 0138 2 x EC-195
HO2S2 (B1) P0139 0139 2 x EC-205
HO2S2 (B1) P1146 1146 2 x EC-335
HO2S2 (B1) P1147 1147 2 x EC-348
HO2S2 (B2) P0158 0158 2 x EC-195
HO2S2 (B2) P0159 0159 2 x EC-205
HO2S2 (B2) P1166 1166 2 x EC-335
HO2S2 (B2) P1167 1167 2 x EC-348
HO2S2 HTR (B1) P0037 0037 2 x EC-132
HO2S2 HTR (B1) P0038 0038 2 x EC-132
HO2S2 HTR (B2) P0057 0057 2 x EC-132
HO2S2 HTR (B2) P0058 0058 2 x EC-132
IAT SEN/CIRCUIT P0112 0112 2 x EC-147
IAT SEN/CIRCUIT P0113 0113 2 x EC-147
INT/V TIM V/CIR-B1 P1111 1111 2 x EC-294
KNOCK SEN/CIRC-B1 P0327 0327 2 — EC-247
KNOCK SEN/CIRC-B1 P0328 0328 2 — EC-247
KNOCK SEN/CIRC-B2 P0332 0332 2 — EC-247
KNOCK SEN/CIRC-B2 P0333 0333 2 — EC-247
L/PRESS SOL/CIRC P0745 0745 2 x AT section
MAF SEN/CIRCUIT P0102 0102 1 x EC-140
MAF SEN/CIRCUIT P0103 0103 1 x EC-140
MIL/CIRC P0650 0650 2 — EC-286
MULTI CYL MISFIRE P0300 0300 2 x EC-241
NATS MALFUNCTION P1610 - P1615 1610 - 1615 2 — EC-50
NO DTC IS DETECTED.
FURTHER TESTING No DTC Flashing*4 — Flashing*4 EC-51
MAY BE REQUIRED.
NO DTC IS DETECTED.
FURTHER TESTING P0000 0000 — — —
MAY BE REQUIRED.

EC-10
 INDEX FOR DTC TB48DE A/T (WITH EURO-OBD)
Alphabetical Index (Cont’d)
DTC*1
Items
CONSULT-II Trip MI lighting up Reference page
(CONSULT-II screen terms) ECM*3
GST*2
P-N POS SW/CIRCUIT P1706 1706 2 x EC-388
PURG VOLUME CONT/V P0444 0444 2 x EC-269
PURG VOLUME CONT/V P0445 0445 2 x EC-269
PW ST P SEN/CIRC P0550 0550 2 — EC-401
SENSOR POWER/CIRC P1229 1229 1 x EC-376
TCC SOLENOID/CIRC P0740 0740 2 x AT section
TP SEN 1/CIRC P0222 0222 1 x EC-235
TP SEN 1/CIRC P0223 0223 1 x EC-235
TP SEN 2/CIRC P0122 0122 1 x EC-157
TP SEN 2/CIRC P0123 0123 1 x EC-157
TP SENSOR P2135 2135 1 x EC-415
TW CATALYST SYS-B1 P0420 0420 2 x EC-264
TW CATALYST SYS-B2 P0430 0430 2 x EC-264
VEH SPEED SEN/CIRC P0500 0500 2 x EC-276
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by ISO 15031-5.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: The trouble shooting for these DTCs needs CONSULT-II.
NOTE:
Regarding Y61 models with TB48DE engine, “B1” indicates bank 1 (cylinders number 1, 2 and 3), “B2” indicates bank 2
(cylinders number 4, 5 and 6).

EC-11
 INDEX FOR DTC TB48DE A/T (WITH EURO-OBD)

DTC No. Index

Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Type approval number” on
the identification plate. Refer to GI section.
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer
to EC-121, “DTC U1000 CAN COMMUNICATION LINE”.
x: Applicable —: Not applicable

DTC*1
Items
CONSULT-II Trip MI lighting up Reference page
ECM*3 (CONSULT-II screen terms)
GST*2
NO DTC IS DETECTED.
No DTC Flashing*4 FURTHER TESTING — Flashing*4 EC-51
MAY BE REQUIRED.
U1000 1000*5 CAN COMM CIRCUIT 1 x EC-121
NO DTC IS DETECTED.
P0000 0000 FURTHER TESTING — — —
MAY BE REQUIRED.
P0031 0031 HO2S1 HTR (B1) 2 x EC-124
P0032 0032 HO2S1 HTR (B1) 2 x EC-124
P0037 0037 HO2S2 HTR (B1) 2 x EC-132
P0038 0038 HO2S2 HTR (B1) 2 x EC-132
P0051 0051 HO2S1 HTR (B2) 2 x EC-124
P0052 0052 HO2S1 HTR (B2) 2 x EC-124
P0057 0057 HO2S2 HTR (B2) 2 x EC-132
P0058 0058 HO2S2 HTR (B2) 2 x EC-132
P0102 0102 MAF SEN/CIRCUIT 1 x EC-140
P0103 0103 MAF SEN/CIRCUIT 1 x EC-140
P0112 0112 IAT SEN/CIRCUIT 2 x EC-147
P0113 0113 IAT SEN/CIRCUIT 2 x EC-147
P0117 0117 ECT SEN/CIRCUIT 1 x EC-152
P0118 0118 ECT SEN/CIRCUIT 1 x EC-152
P0122 0122 TP SEN 2/CIRC 1 x EC-157
P0123 0123 TP SEN 2/CIRC 1 x EC-157
P0132 0132 HO2S1 (B1) 2 x EC-163
P0133 0133 HO2S1 (B1) 2 x EC-172
P0134 0134 HO2S1 (B1) 2 x EC-172
P0138 0138 HO2S2 (B1) 2 x EC-195
P0139 0139 HO2S2 (B1) 2 x EC-205
P0152 0152 HO2S1 (B2) 2 x EC-163
P0153 0153 HO2S1 (B2) 2 x EC-172
P0154 0154 HO2S1 (B2) 2 x EC-172
P0158 0158 HO2S2 (B2) 2 x EC-195
P0159 0159 HO2S2 (B2) 2 x EC-205
P0171 0171 FUEL SYS-LEAN-B1 2 x EC-218
P0172 0172 FUEL SYS-RICH-B1 2 x EC-227
P0174 0174 FUEL SYS-LEAN-B2 2 x EC-218

EC-12
 INDEX FOR DTC TB48DE A/T (WITH EURO-OBD)
DTC No. Index (Cont’d)
DTC*1
Items
CONSULT-II Trip MI lighting up Reference page
ECM*3 (CONSULT-II screen terms)
GST*2
P0175 0175 FUEL SYS-RICH-B2 2 x EC-227
P0222 0222 TP SEN 1/CIRC 1 x EC-235
P0223 0223 TP SEN 1/CIRC 1 x EC-235
P0300 0300 MULTI CYL MISFIRE 2 x EC-241
P0301 0301 CYL 1 MISFIRE 2 x EC-241
P0302 0302 CYL 2 MISFIRE 2 x EC-241
P0303 0303 CYL 3 MISFIRE 2 x EC-241
P0304 0304 CYL 4 MISFIRE 2 x EC-241
P0305 0305 CYL 5 MISFIRE 2 x EC-241
P0306 0306 CYL 6 MISFIRE 2 x EC-241
P0327 0327 KNOCK SEN/CIRC-B1 2 — EC-247
P0328 0328 KNOCK SEN/CIRC-B1 2 — EC-247
P0332 0332 KNOCK SEN/CIRC-B2 2 — EC-247
P0333 0333 KNOCK SEN/CIRC-B2 2 — EC-247
P0335 0335 CKP SEN/CIRCUIT 2 x EC-251
P0340 0340 CMP SEN/CIRC-B1 2 x EC-257
P0420 0420 TW CATALYST SYS-B1 2 x EC-264
P0430 0430 TW CATALYST SYS-B2 2 x EC-264
P0444 0444 PURG VOLUME CONT/V 2 x EC-269
P0445 0445 PURG VOLUME CONT/V 2 x EC-269
P0500 0500 VEH SPEED SEN/CIRC 2 x EC-276
P0550 0550 PW ST P SEN/CIRC 2 — EC-278
P0605 0605 ECM 1 or 2 x or — EC-283
P0650 0650 MIL/CIRC 2 — EC-286
P0740 0740 TCC SOLENOID/CIRC 2 x AT section
P0745 0745 L/PRESS SOL/CIRC 2 x AT section
P1065 1065 ECM BACK UP/CIRC 2 x EC-290
P1111 1111 INT/V TIM V/CIR-B1 2 x EC-294
P1121 1121 ETC ACTR 1 or 2 x EC-299
P1122 1122 ETC FUNCTION/CIRC 1 x EC-301
P1124 1124 ETC MOT PWR 1 x EC-309
P1126 1126 ETC MOT PWR 1 x EC-309
P1128 1128 ETC MOT 1 x EC-315
P1143 1143 HO2S1 (B1) 2 x EC-320
P1144 1144 HO2S1 (B1) 2 x EC-327
P1146 1146 HO2S2 (B1) 2 x EC-335
P1147 1147 HO2S2 (B1) 2 x EC-348
P1163 1163 HO2S1 (B2) 2 x EC-320
P1164 1164 HO2S1 (B2) 2 x EC-327
P1166 1166 HO2S2 (B2) 2 x EC-335
P1167 1167 HO2S2 (B2) 2 x EC-348

EC-13
 INDEX FOR DTC TB48DE A/T (WITH EURO-OBD)
DTC No. Index (Cont’d)
DTC*1
Items
CONSULT-II Trip MI lighting up Reference page
ECM*3 (CONSULT-II screen terms)
GST*2
P1217 1217 ENG OVER TEMP 1 x EC-361
P1225 1225 CTP LEARNING 2 — EC-372
P1226 1226 CTP LEARNING 2 — EC-374
P1229 1229 SENSOR POWER/CIRC 1 x EC-376
P1336 1336 CKP SENSOR (COG) 2 x EC-381
P1610 - P1615 1610 - 1615 NATS MALFUNCTION 2 — EC-50
P1706 1706 P-N POS SW/CIRCUIT 2 x EC-388
P1805 1805 BRAKE SW/CIRCUIT 2 — EC-395
P2122 2122 APP SEN 1/CIRC 1 x EC-401
P2123 2123 APP SEN 1/CIRC 1 x EC-401
P2127 2127 APP SEN 2/CIRC 1 x EC-408
P2128 2128 APP SEN 2/CIRC 1 x EC-408
P2135 2135 TP SENSOR 1 x EC-415
P2138 2138 APP SENSOR 1 x EC-421
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by ISO 15031-5.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: The trouble shooting for these DTCs need CONSULT-II.
NOTE:
Regarding Y61 models with TB48DE engine, “B1” indicates bank 1 (cylinders number 1, 2 and 3), “B2” indicates bank 2
(cylinders number 4, 5 and 6).

EC-14
 PRECAUTIONS TB48DE A/T (WITH EURO-OBD)

Precautions for Supplemental Restraint

System (SRS) “AIR BAG” and “SEAT BELT
PRE-TENSIONER”
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 Y61 is as follows (The
composition varies according to the destination and optional equipment.):
+ For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the
steering 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.
+ 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:
+ 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.
+ 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.
+ 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 by yellow harness connector.

On Board Diagnostic (OBD) System of

Engine and A/T
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver
of a malfunction causing emission deterioration.
CAUTION:
+ Be sure to turn the ignition switch OFF and disconnect the battery ground cable before any repair
or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will
cause the MI to light up.
+ Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector
will cause the MI to light up due to the open circuit. (Be sure the connector is free from water,
grease, dirt, bent terminals, etc.)
+ 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.
+ Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MI to light up due to the short circuit.
+ Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber
tube may cause the MI to light up due to the malfunction of the fuel injection system, etc.
+ Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.

EC-15
 PRECAUTIONS TB48DE A/T (WITH EURO-OBD)

Precaution
+ Always use a 12 volt battery as power source.
+ Do not attempt to disconnect battery cables while engine
is running.
+ Before connecting or disconnecting the ECM harness
connector, turn ignition switch OFF and disconnect bat-
tery ground cable. Failure to do so may damage the ECM
because battery voltage is applied to ECM even if igni-
tion switch is turned off.
+ Before removing parts, turn ignition switch OFF and
SEF289H
then disconnect battery ground cable.
+ Do not disassemble ECM.
+ If battery cable is disconnected, the memory will return
to the initial ECM values.
The ECM will now start to self-control at its initial values.
Engine operation can vary slightly when the cable is
disconnected. However, this is not an indication of a
malfunction. Do not replace parts because of a slight
variation.

SEF707Y

+ When connecting ECM harness connector, fasten it

securely with levers as far as they will go as shown at
right.

PBIB1162E

PBIB1163E

EC-16
 PRECAUTIONS TB48DE A/T (WITH EURO-OBD)
Precaution (Cont’d)
+ 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.
+ Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting
in damage to ICs.
+ Keep engine control system harness at least 10 cm (4 in)
PBIB0090E away from adjacent harness, to prevent engine control
system malfunctions due to receiving external noise,
degraded operation of ICs, etc.
+ Keep engine control system parts and harness dry.

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

erence Value” inspection and make sure ECM functions
properly. Refer to EC-80, “ECM Terminals and Reference
Value”.
+ Handle mass air flow sensor carefully to avoid damage.
+ Do not disassemble mass air flow sensor.
+ Do not clean mass air flow sensor with any type of deter-
gent.
+ Do not disassemble electric throttle control actuator.
+ Even a slight leak in the air intake system can cause
MEF040D serious incidents.
+ Do not shock or jar the camshaft position sensor, crank-
shaft position sensor (OBD).

+ 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-17
 PRECAUTIONS TB48DE A/T (WITH EURO-OBD)
Precaution (Cont’d)
+ When measuring ECM signals with a circuit tester, con-
nect a break-out box (SST) and Y-cable adapter (SST)
between the ECM and ECM harness connector.
+ 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 damage the ECM power transistor.
+ 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.

SEF348N

+ Do not operate fuel pump when there is no fuel in lines.

+ Tighten fuel hose clamps to the specified torque.

SEC686C

+ Do not depress accelerator pedal when starting.

+ Immediately after starting, do not rev up engine unnec-
essarily.
+ Do not rev up engine just prior to shutdown.

SEF709Y

+ When installing C.B. ham radio or a mobile phone, be

sure to observe the following as it may adversely affect
electronic control systems depending on installation
location.
— Keep the antenna as far as possible from the electronic
control units.
— Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
— Adjust the antenna and feeder line so that the standing-
SEF708Y wave radio can be kept smaller.
— Be sure to ground the radio to vehicle body.
EC-18
 PRECAUTIONS TB48DE A/T (WITH EURO-OBD)
Precaution (Cont’d)
+ Regarding Y61 models with TB48DE engine, “B1” indi-
cates bank 1 (cylinders number 1, 2, 3), “B2” indicates
bank 2 (cylinders number 4, 5, 6).

SEC888C

SEC889C

Wiring Diagrams and Trouble Diagnosis

When you read wiring diagrams, refer to the following:
+ “How to Read Wiring Diagrams” in GI section
+ “POWER SUPPLY ROUTING” for power distribution circuit in
EL section
When you perform trouble diagnosis, refer to the following:
+ “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAG-
NOSES” in GI section
+ “How to Perform Efficient Diagnosis for an Electrical Incident”
in GI section

EC-19
 PREPARATION TB48DE A/T (WITH EURO-OBD)

Special Service Tools

Tool number
Description
Tool name
KV10117100 Loosening or tightening heated oxygen sensors
Heated oxygen sensor with 22 mm (0.87 in) hexagon nut
wrench

NT379

KV10114400 Loosening or tightening heated oxygen sensors

Heated oxygen sensor a: 22 mm (0.87 in)
wrench

NT636

Commercial Service Tools

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

NT653

Socket wrench Removing and installing engine coolant tem-

perature sensor

NT705

Oxygen sensor thread Reconditioning the exhaust system threads

cleaner before installing a new oxygen sensor. Use with
ie: (J-43897-18) anti-seize lubricant shown below.
(J-43897-12) a: 18 mm diameter with pitch 1.5 mm for Zir-
conia Oxygen Sensor
b: 12 mm diameter with pitch 1.25 mm for
Titania Oxygen Sensor

AEM488

EC-20
 PREPARATION TB48DE A/T (WITH EURO-OBD)
Commercial Service Tools (Cont’d)
Tool name Description
Anti-seize lubricant Lubricating oxygen sensor thread cleaning tool
ie: (PermatexTM 133AR when reconditioning exhaust system threads.
or equivalent meeting
MIL specification MIL-A-
907)

NT779

EC-21
ENGINE CONTROL
SYSTEM TB48DE A/T (WITH EURO-OBD)

System Diagram

SEC745D

EC-22
 ENGINE CONTROL
SYSTEM TB48DE A/T (WITH EURO-OBD)

Vacuum Hose Drawing

Refer to EC-22, “System Diagram” for Vacuum Control System.

SEC665D

EC-23
 ENGINE CONTROL
SYSTEM TB48DE A/T (WITH EURO-OBD)

System Chart
Input (Sensor) ECM Function Output (Actuator)
+ Camshaft position sensor Fuel injection & mixture ratio control Fuel injectors
+ Crankshaft position sensor (OBD)
+ Mass air flow sensor Electronic ignition system Power transistor
+ Engine coolant temperature sensor
+ Heated oxygen sensor 1 Fuel pump control Fuel pump relay
+ Throttle position sensor
On board diagnostic system MI (On the instrument panel)
+ Accelerator pedal position sensor
+ Park/neutral position (PNP) switch Intake valve timing control Intake valve timing control solenoid valve
+ Intake air temperature sensor
+ Power steering pressure sensor Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
+ Ignition switch
+ Stop lamp switch Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
+ Battery voltage
EVAP canister purge volume control sole-
+ Knock sensor EVAP canister purge flow control
noid valve
+ Refrigerant pressure sensor
+ Heated oxygen sensor 2*1 Air conditioning cut control Air conditioner relay
+ TCM (Transmission control module)*2
+ Air conditioner switch*2 Power valve control VIAS control solenoid valve
+ Vehicle speed sensor*2
+ Electrical load signal*2 Cooling fan control Cooling fan relay

*1: This sensor is not used to control the engine system under normal conditions.
*2: The signals are sent to the ECM through CAN communication line.

Multiport Fuel Injection (MFI) System

INPUT/OUTPUT SIGNAL CHART
Sensor Input Signal to ECM ECM Function Actuator
Engine speed and piston
Camshaft position sensor
position
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Density of oxygen in
Heated oxygen sensor 1
exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position Fuel injection & mixture ratio
Fuel injectors
control
Knock sensor Engine knocking condition
Battery Battery voltage
Power steering pressure sensor Power steering operation
Density of oxygen in
Heated oxygen sensor 2*1
exhaust gas
Vehicle speed sensor*2 Vehicle speed
Air conditioner switch*2 Air conditioner operation
Ignition switch Start signal
*1: Under normal conditions, this sensor is not for engine control operation.
*2: This signal is sent to the ECM through CAN communication line.

EC-24
 ENGINE CONTROL
SYSTEM TB48DE A/T (WITH EURO-OBD)
Multiport Fuel Injection (MFI) System
SYSTEM DESCRIPTION (Cont’d)
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 deter-
mined by input signals (for engine speed and intake air) from both the camshaft position sensor and the mass
air flow sensor.

VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION

In addition, the amount of fuel injected is compensated to improve engine performance under various oper-
ating conditions as listed below.
<Fuel increase>
+ During warm-up
+ When starting the engine
+ During acceleration
+ Hot-engine operation
+ When selector lever is changed from “N” to “D”
+ High-load, high-speed operation
<Fuel decrease>
+ During deceleration
+ During high engine speed operation

MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)

PBIB0121E

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
heated oxygen sensor 1 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 heated
oxygen sensor 1, refer to EC-163. This maintains the mixture ratio within the range of stoichiometric (ideal
air-fuel mixture).
This stage is referred to as the closed loop control condition.
Heated oxygen sensor 2 is located downstream of the three way catalyst (manifold). Even if the switching
characteristics of heated oxygen sensor 1 shift, the air-fuel ratio is controlled to stoichiometric by the signal
from heated oxygen sensor 2.

Open loop control

The open loop system condition refers to when the ECM detects any of the following conditions. Feedback
control stops in order to maintain stabilized fuel combustion.
+ Deceleration and acceleration
+ High-load, high-speed operation
+ Malfunction of heated oxygen sensor 1 or its circuit
+ Insufficient activation of heated oxygen sensor 1 at low engine coolant temperature
+ High engine coolant temperature
+ During warm-up
+ After shifting from “N” to “D”
+ When starting the engine

EC-25
 ENGINE CONTROL
SYSTEM TB48DE A/T (WITH EURO-OBD)
Multiport Fuel Injection (MFI) System
(Cont’d)
MIXTURE RATIO SELF-LEARNING CONTROL
The mixture ratio feedback control system monitors the mixture ratio signal transmitted from heated oxygen
sensor 1. 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 controlled as
originally designed. Both manufacturing differences (i.e., mass air flow sensor hot film) and characteristic
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
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 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 theoreti-
cal value. The signal from heated oxygen sensor 1 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.
“Long term fuel trim” is overall fuel compensation carried out long-term to compensate for continual devia-
tion 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.

FUEL INJECTION TIMING

SEF179U

Two types of systems are used.

Sequential multiport fuel injection system

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

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
Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.

EC-26
 ENGINE CONTROL
SYSTEM TB48DE A/T (WITH EURO-OBD)

Electronic Ignition (EI) System

INPUT/OUTPUT SIGNAL CHART
Sensor Input Signal to ECM ECM Function Actuator
Engine speed and piston posi-
Camshaft position sensor
tion
Mass air flow sensor Amount of intake air
Engine coolant temperature
Engine coolant temperature
sensor
Throttle position sensor Throttle position
Accelerator pedal position sen-
Accelerator pedal position Ignition timing control Power transistor
sor
Knock sensor Engine knocking
Park/neutral position (PNP)
Gear position
switch
Battery Battery voltage
Vehicle speed sensor*1 Vehicle speed
Ignition switch Start signal
*1: This signal is sent to the ECM through CAN communication line.

SYSTEM DESCRIPTION
The ignition timing is controlled by the ECM to maintain the best
air-fuel ratio for every running condition of the engine. The igni-
tion 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. Computing this information,
ignition signals are transmitted to the power transistor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
A °BTDC
SEF742M During the following conditions, the ignition timing is revised by
the ECM according to the other data stored in the ECM.
+ At starting
+ During warm-up
+ At idle
+ At low battery voltage
+ During acceleration
The knock sensor retard system is designed only for emergen-
cies. The basic ignition timing is programmed within the anti-
knocking zone, if recommended fuel is used under dry condi-
tions. 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.

EC-27
 ENGINE CONTROL
SYSTEM TB48DE A/T (WITH EURO-OBD)

Air Conditioning Cut Control

INPUT/OUTPUT SIGNAL CHART
Sensor Input Signal to ECM ECM Function Actuator
Air conditioner switch*1 Air conditioner “ON” signal
Throttle position sensor Throttle valve opening angle
Camshaft position sensor Engine speed
Engine coolant temperature
Engine coolant temperature
sensor
Battery Battery voltage Air conditioner cut control Air conditioner relay
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sen-
Power steering operation
sor
Vehicle speed sensor*1 Vehicle speed
Ignition switch Start signal
*1: These signals are sent to the ECM through CAN communication line.

SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
+ When the accelerator pedal is fully depressed.
+ When cranking the engine.
+ At high engine speeds.
+ When the engine coolant temperature becomes excessively high.
+ When operating power steering during low engine speed or low vehicle speed.
+ When engine speed is excessively low.
+ When refrigerant pressure is excessively low or high.

Fuel Cut Control (at No Load and High

Engine Speed)
INPUT/OUTPUT SIGNAL CHART
Sensor Input Signal to ECM ECM Function Actuator
Park/neutral position (PNP)
Neutral position
switch
Throttle position sensor Throttle position
Accelerator pedal position sen-
Accelerator pedal position
sor Fuel cut control Fuel injectors
Engine coolant temperature
Engine coolant temperature
sensor
Camshaft position sensor Engine speed
Vehicle speed sensor*1 Vehicle speed
*1: This signal is sent to the ECM through CAN communication line.

SYSTEM DESCRIPTION
If the engine speed is above 3,950 rpm with no load (for example, in neutral and engine speed over 3,950
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-24.

EC-28
 ENGINE CONTROL
SYSTEM TB48DE A/T (WITH EURO-OBD)

CAN Communication
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle
multiplex communication line with high data communication speed and excellent error detection ability. Many
electronic control units are equipped onto a vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with
less wiring. Each control unit transmits/receives data but selectively reads required data only.

SYSTEM DIAGRAM

SEL599Y

Input/output signal chart

T: Transmit R: Receive
Signals Combination meter TCM ECM
Engine speed signal R R T
Engine coolant temperature signal R R T
Accelerator pedal position signal R T
Closed throttle position signal R T
Wide open throttle position signal R T
A/T fluid temperature warning lamp signal R T R
Current gear position signal R T R
Shift change signal T R
Air conditioner switch signal T R
Headlamp switch signal T R
Rear window defogger switch signal T R
Brake switch signal T R
Vehicle speed signal T R R
A/T self diagnosis signal T R
Manual mode signal T R

EC-29
 BASIC SERVICE
PROCEDURE TB48DE A/T (WITH EURO-OBD)

Idle Speed and Ignition Timing Check

IDLE SPEED
With CONSULT-II
Check idle speed in “DATA MONITOR” mode with CONSULT-II.
With GST
Check idle speed with GST.

SEF058Y

IGNITION TIMING
Any of following two methods may be used.

Method A
1. Slide the harness protector of ignition coil No. 1 to clear the
wires.
2. Attach timing light to the wires as shown.
3. Check ignition timing.

SEC560C

Method B
1. Remove No. 1 ignition coil.
2. 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.

SEC561C

SEF166Y

3. Check ignition timing.

SEC536DA

EC-30
 BASIC SERVICE
PROCEDURE TB48DE A/T (WITH EURO-OBD)

Accelerator Pedal Released Position

Learning
DESCRIPTION
“Accelerator Pedal Released Position Learning” is an operation to learn the fully released position of the
accelerator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed
each time harness connector of accelerator pedal position sensor or ECM is disconnected.

OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch “ON” and wait at least 2 seconds.
3. Turn ignition switch “OFF” wait at least 10 seconds.
4. Turn ignition switch “ON” and wait at least 2 seconds.
5. Turn ignition switch “OFF” wait at least 10 seconds.

Throttle Valve Closed Position Learning

DESCRIPTION
“Throttle Valve Closed Position Learning” is an operation to learn the fully closed position of the throttle valve
by monitoring the throttle position sensor output signal. It must be performed each time harness connector
of electric throttle control actuator or ECM is disconnected.

OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch “ON”.
3. Turn ignition switch “OFF” wait at least 10 seconds.
Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning

DESCRIPTION
“Idle Air Volume Learning” is an operation to learn the idle air volume that keeps each engine within the
specific range. It must be performed under any of the following conditions:
+ Each time electric throttle control actuator or ECM is replaced.
+ Idle speed or ignition timing is out of specification.

PREPARATION
Before performing “Idle Air Volume Learning”, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
+ Battery voltage: More than 12.9V (At idle)
+ Engine coolant temperature: 70 - 95°C (158 - 203°F)
+ PNP switch: ON
+ Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light
only small lamps.
+ Steering wheel: Neutral (Straight-ahead position)
+ Vehicle speed: Stopped
+ Transmission: Warmed-up
For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “A/T”
system indicates less than 0.9V.
For A/T models without CONSULT-II, drive vehicle for 10 minutes.

EC-31
 BASIC SERVICE
PROCEDURE TB48DE A/T (WITH EURO-OBD)
Idle Air Volume Learning (Cont’d)
OPERATION PROCEDURE
With CONSULT-II
1. Perform EC-31, “Accelerator Pedal Released Position Learning”.
2. Perform EC-31, “Throttle Valve Closed Position Learning”.
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.
5. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.

SEF217Z

6. Touch “START” and wait 20 seconds.

SEF454Y

7. Make sure that “CMPLT” is displayed on CONSULT-II

screen. If “CMPLT” is not displayed, “Idle Air Volume Learn-
ing” will not be carried out successfully. In this case, find the
cause of the incident by referring to the “Diagnostic Proce-
dure” below.
8. Rev up the engine two or three times and make sure that idle
speed and ignition timing are within the specifications.
ITEM SPECIFICATION
Idle speed 675±50 rpm (in “P” or “N” position)
MBIB0238E Ignition timing 10±5° BTDC (in “P” or “N” position)

EC-32
 BASIC SERVICE
PROCEDURE TB48DE A/T (WITH EURO-OBD)
Idle Air Volume Learning (Cont’d)
Without CONSULT-II
NOTE:
+ It is better to count the time accurately with a clock.
+ It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
1. Perform EC-31, “Accelerator Pedal Released Position Learning”.
2. Perform EC-31, “Throttle Valve Closed Position Learning”.
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.
5. Turn ignition switch “OFF” and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MI stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MI turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.

PBIB0665E

12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
ITEM SPECIFICATION
Idle speed 675±50 rpm (in “P” or “N” position)
Ignition timing 10±5° BTDC (in “P” or “N” position)

13. If idle speed and ignition timing are not within the specification, “Idle Air Volume Learning” will not be
carried out successfully. In this case, find the cause of the incident by referring to the “Diagnostic Pro-
cedure” below.

DIAGNOSTIC PROCEDURE
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. When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform EC-108, “TROUBLE DIAGNOSIS — SPECIFICATION VALUE”.
5. If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform “Idle air volume learning” all over again:
— Engine stalls.
— Erroneous idle.

EC-33
 BASIC SERVICE
PROCEDURE TB48DE A/T (WITH EURO-OBD)

Fuel Pressure Check

FUEL PRESSURE RELEASE
Before disconnecting fuel line, release fuel pressure from
fuel line to eliminate danger.
With CONSULT-II
1. Turn ignition switch “ON”.
2. Perform “FUEL PRESSURE RELEASE” in “WORK SUP-
PORT” mode with CONSULT-II.
SEF214Y
3. Start engine.
4. After engine stalls, crank it two or three times to release all
fuel pressure.
5. Turn ignition switch “OFF”.

Without CONSULT-II
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.

SEC550C

FUEL PRESSURE CHECK

+ When reconnecting fuel line, always use new clamps.
+ Make sure that clamp screw does not contact adjacent
parts.
+ Use a torque driver to tighten clamps.
+ Use Pressure Gauge to check fuel pressure.
1. Release fuel pressure to zero, refer to above.
2. Disconnect fuel hose between fuel filter and fuel tube (engine
side).
3. Install pressure gauge between fuel filter and fuel tube.
SEC551C 4. Start engine and check for fuel leakage.
5. Read the indication of fuel pressure gauge.
At idling:
Approximately 245 kPa (2.45 bar, 2.5 kg/cm2, 36
psi)
A few seconds after ignition switch is turned OFF to
ON:
Approximately 294 kPa (2.94 bar, 3.0 kg/cm2, 43
psi)
6. Stop engine and disconnect fuel pressure regulator vacuum
hose from intake manifold.
SEF718BA 7. Plug intake manifold with a rubber cap.
8. Connect variable vacuum source to fuel pressure regulator.
EC-34
 BASIC SERVICE
PROCEDURE TB48DE A/T (WITH EURO-OBD)

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

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

Injector Removal and Installation

1. Release fuel pressure to zero.
2. Disconnect harness connector clip.
3. Disconnect injector harness connectors.
4. Disconnect fuel hoses from fuel tube assembly.
5. Remove fuel tube assemblies in reverse numerical sequence
of that shown in the figure at left.

SEC552C

6.Expand and remove clips securing fuel injectors.

7.Extract fuel injectors straight from fuel tubes.
+ Do not extract injector by pinching connector.
+ Be careful not to damage injector nozzles during
removal.
+ Do not bump or drop fuel injectors.

SEC553C

8. Install injector to fuel tube assembly.

+ Lubricate O-rings with a smear of silicone oil.
+ Be careful not to damage O-rings with service tools, fin-
ger nails or clips. Do not expand or twist O-rings.
+ Discard old clips, replace with new ones.
9. Position clips in grooves on fuel injectors.
+ Make sure that protrusions of fuel injectors are aligned
with cutouts of clips after installation.
10. Align protrusions of fuel tubes with those of fuel injectors.
Insert fuel injectors straight into fuel tubes.
SEC559C 11. 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 tube are engaged with clips.

SEC554C

EC-35
 BASIC SERVICE
PROCEDURE TB48DE A/T (WITH EURO-OBD)
Injector Removal and Installation (Cont’d)
12. Tighten fuel tube assembly mounting nuts in numerical
sequence (indicated in the figure at left) and in two stages.
: Tightening torque Nzm (kg-m, ft-lb)
1st stage:
9 - 20 (0.9 - 2.1, 7 - 15)
2nd stage:
21 - 26 (2.1 - 2.7, 16 - 19)
13. Insert fuel hoses into fuel tubes so that ends of fuel hoses
butt up against fuel tubes; fasten with clamps, avoiding
bulges.
SEC552C CAUTION:
After properly connecting fuel tube assembly to injector and
fuel hose, check connection for fuel leakage.

EC-36
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)

Introduction
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or
actuators. The ECM also records various emission-related diagnostic information including:
Emission-related diagnostic information ISO Standard
Diagnostic Trouble Code (DTC) Mode 3 of ISO 15031-5
Freeze Frame data Mode 2 of ISO 15031-5
System Readiness Test (SRT) code Mode 1 of ISO 15031-5
1st Trip Diagnostic Trouble Code (1st Trip DTC) Mode 7 of ISO 15031-5
1st Trip Freeze Frame data
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 using procedures listed in the table below.
x: Applicable —: Not applicable

Freeze Frame 1st trip Freeze

DTC 1st trip DTC SRT code Test value
data Frame data
CONSULT-II x x x x x —
GST x x*1 x — x x
ECM x x*2 — — — —
*1: 1st trip DTCs for self-diagnoses concerning SRT items cannot be shown on the GST display.
*2: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
The malfunction indicator (MI) 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-65.)

Two Trip Detection Logic

When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in
the ECM memory. The MI 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 MI lights up. The MI lights up at the same time when the DTC is stored. <2nd
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 MI,
and store DTC and Freeze Frame data, even in the 1st trip, as shown below.
x: Applicable —: Not applicable

MI DTC 1st trip DTC

1st trip 2nd trip
Items 1st trip 2nd trip 1st trip 2nd trip
Lighting Lighting displaying displaying displaying displaying
Blinking Blinking
up up
Misfire (Possible three way cata-
lyst damage) — DTC: P0300 - x — — — — — x —
P0306 is being detected
Misfire (Possible three way cata-
lyst damage) — DTC: P0300 - — — x — — x — —
P0306 is being detected
One trip detection diagnoses
— x — — x — x —
(Refer to EC-9.)
Except above — — — x — x x —

EC-37
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)

Emission-related Diagnostic Information

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
DTC*1 Test Value/
Items Reference
CONSULT-II SRT code Test Limit 1st trip DTC
(CONSULT-II screen terms) ECM page
GST*2 (GST only)

CAN COMM CIRCUIT U1000 1000*3 — — — EC-121

NO DTC IS DETECTED.
FURTHER TESTING P0000 0000 — — — —
MAY BE REQUIRED.
HO2S1 HTR (B1) P0031 0031 x x x*4 EC-124
HO2S1 HTR (B1) P0032 0032 x x x*4 EC-124
HO2S2 HTR (B1) P0037 0037 x x x*4 EC-132
HO2S2 HTR (B1) P0038 0038 x x x*4 EC-132
HO2S1 HTR (B2) P0051 0051 x x x*4 EC-124
HO2S1 HTR (B2) P0052 0052 x x x*4 EC-124
HO2S2 HTR (B2) P0057 0057 x x x*4 EC-132
HO2S2 HTR (B2) P0058 0058 x x x*4 EC-132
MAF SEN/CIRCUIT P0102 0102 — — — EC-140
MAF SEN/CIRCUIT P0103 0103 — — — EC-140
IAT SEN/CIRCUIT P0112 0112 — — x EC-147
IAT SEN/CIRCUIT P0113 0113 — — x EC-147
ECT SEN/CIRCUIT P0117 0117 — — — EC-152
ECT SEN/CIRCUIT P0118 0118 — — — EC-152
TP SEN 2/CIRC P0122 0122 — — — EC-157
TP SEN 2/CIRC P0123 0123 — — — EC-157
HO2S1 (B1) P0132 0132 x x x*4 EC-163
HO2S1 (B1) P0133 0133 x x x*4 EC-172
HO2S1 (B1) P0134 0134 x x x*4 EC-172
HO2S2 (B1) P0138 0138 x x x*4 EC-195
HO2S2 (B1) P0139 0139 x x x*4 EC-205
HO2S1 (B2) P0152 0152 x x x*4 EC-163
HO2S1 (B2) P0153 0153 x x x*4 EC-172
HO2S1 (B2) P0154 0154 x x x*4 EC-172
HO2S2 (B2) P0158 0158 x x x*4 EC-195
HO2S2 (B2) P0159 0159 x x x*4 EC-205
FUEL SYS-LEAN-B1 P0171 0171 — — x EC-218
FUEL SYS-RICH-B1 P0172 0172 — — x EC-227
FUEL SYS-LEAN-B2 P0174 0174 — — x EC-218
FUEL SYS-RICH-B2 P0175 0175 — — x EC-227
TP SEN 1/CIRC P0222 0222 — — — EC-235
TP SEN 1/CIRC P0223 0223 — — — EC-235
MULTI CYL MISFIRE P0300 0300 — — x EC-241
CYL 1 MISFIRE P0301 0301 — — x EC-241
CYL 2 MISFIRE P0302 0302 — — x EC-241

EC-38
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
DTC*1 Test Value/
Items Reference
CONSULT-II SRT code Test Limit 1st trip DTC
(CONSULT-II screen terms) ECM page
GST*2 (GST only)

CYL 3 MISFIRE P0303 0303 — — x EC-241

CYL 4 MISFIRE P0304 0304 — — x EC-241
CYL 5 MISFIRE P0305 0305 — — x EC-241
CYL 6 MISFIRE P0306 0306 — — x EC-241
KNOCK SEN/CIRC-B1 P0327 0327 — — x EC-247
KNOCK SEN/CIRC-B1 P0328 0328 — — x EC-247
KNOCK SEN/CIRC-B2 P0332 0332 — — x EC-247
KNOCK SEN/CIRC-B2 P0333 0333 — — x EC-247
CKP SEN/CIRCUIT P0335 0335 — — x EC-251
CMP SEN/CIRC-B1 P0340 0340 — — x EC-257
TW CATALYST SYS-B1 P0420 0420 x x x*4 EC-264
TW CATALYST SYS-B2 P0430 0430 x x x*4 EC-264
PURG VOLUME CONT/V P0444 0444 — — x EC-269
PURG VOLUME CONT/V P0445 0445 — — x EC-269
VEH SPEED SEN/CIRC P0500 0500 — — x EC-276
PW ST P SEN/CIRC P0550 0550 — — x EC-278
ECM P0605 0605 — — x EC-283
MIL/CIRC P0650 0650 — — x EC-286
TCC SOLENOID/CIRC P0740 0740 — — x AT section
L/PRESS SOL/CIRC P0745 0745 — — x AT section
ECM BACK UP/CIRC P1065 1065 — — x EC-290
INT/V TIM V/CIR-B1 P1111 1111 — — x EC-294
ETC ACTR P1121 1121 — — x EC-299
ETC FUNCTION/CIRC P1122 1122 — — — EC-301
ETC MOT PWR P1124 1124 — — — EC-309
ETC MOT PWR P1126 1126 — — — EC-309
ETC MOT P1128 1128 — — — EC-315
HO2S1 (B1) P1143 1143 x x x*4 EC-320
HO2S1 (B1) P1144 1144 x x x*4 EC-327
HO2S2 (B1) P1146 1146 x x x*4 EC-335
HO2S2 (B1) P1147 1147 x x x*4 EC-348
HO2S1 (B2) P1163 1163 x x x*4 EC-320
HO2S1 (B2) P1164 1164 x x x*4 EC-327
HO2S2 (B2) P1166 1166 x x x*4 EC-335
HO2S2 (B2) P1167 1167 x x x*4 EC-348
ENG OVER TEMP P1217 1217 — — — EC-361
CTP LEARNING P1225 1225 — — x EC-372
CTP LEARNING P1226 1226 — — x EC-374
SENSOR POWER/CIRC P1229 1229 — — — EC-376
CKP SENSOR (COG) P1336 1336 — — x EC-381

EC-39
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
DTC*1 Test Value/
Items Reference
CONSULT-II SRT code Test Limit 1st trip DTC
(CONSULT-II screen terms) ECM page
GST*2 (GST only)

P1610 -
NATS MALFUNCTION 1610 - 1615 — — x EC-50
P1615
P-N POS SW/CIRCUIT P1706 1706 — — x EC-388
BRAKE SW/CIRCUIT P1805 1805 — — x EC-395
APP SEN 1/CIRC P2122 2122 — — — EC-401
APP SEN 1/CIRC P2123 2123 — — — EC-401
APP SEN 2/CIRC P2127 2127 — — — EC-408
APP SEN 2/CIRC P2128 2128 — — — EC-408
TP SENSOR P2135 2135 — — — EC-415
APP SENSOR P2138 2138 — — — EC-421
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by ISO 15031-5.
*3: The trouble shooting for these DTCs need CONSULT-II.
*4: These are not displayed with GST.
NOTE:
Regarding Y61 models with TB48DE engine, “B1” indicates bank 1 (cylinders number 1, 2 and 3), “B2” indicates bank 2
(cylinders number 4, 5 and 6).

DTC AND 1ST TRIP DTC

The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnos-
tic 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 MI 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 malfunction is
detected in the 2nd trip, both the 1st trip DTC and DTC are stored in the ECM memory and the MI lights up.
In other words, the DTC is stored in the ECM memory and the MI lights up when the same malfunction occurs
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 malfunctions that blink or light up the
MI 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 EC-49, “HOW
TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
For malfunctions in which 1st trip DTCs are displayed, refer to EC-38, “EMISSION-RELATED DIAGNOS-
TIC INFORMATION ITEMS. 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 MI
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 EC-60, “WORK FLOW”. Then perform “DTC
Confirmation Procedure” or “Overall Function Check” to try to duplicate the malfunction. If the malfunction
is duplicated, the item requires repair.

How to read DTC and 1st trip DTC

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, P0705, P0750, etc.
These DTCs are prescribed by ISO 15031-5.
(CONSULT-II also displays the malfunctioning component or system.)
EC-40
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
No Tools
The number of blinks of the MI in the Diagnostic Test Mode II (Self-Diagnostic Results) indicates the DTC.
Example: 0102, 0340 etc.
These DTCs are controlled by NISSAN.
+ 1st trip DTC No. is the same as DTC No.
+ Output of a DTC indicates a malfunction. However, GST or the Diagnostic Test Mode II do 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 CON-
SULT-II (if available) is recommended.
A sample of CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a mal-
function 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]”.

PBIB0911E

FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA

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, 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
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-92, “Freeze Frame Data and 1st Trip Freeze Frame Data”.
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
priority for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However,
once freeze frame data (2nd trip detection/MI 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 following priorities to update the data.
Priority Items
Misfire — DTC: P0300 - P0306
1
Freeze frame data 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 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 dif-
ferent malfunction is detected. There is no priority for 1st trip freeze frame data. However, once freeze frame
data is 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 in the ECM memory.

EC-41
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
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 EC-52, “HOW TO ERASE
EMISSION-RELATED DIAGNOSTIC INFORMATION”.

SYSTEM READINESS TEST (SRT) CODE

System Readiness Test (SRT) code is specified in Mode 1 of ISO 15031-5.
As part of an enhanced 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. 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”.
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.
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.
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.
If, during the state emissions inspection, the SRT indicates “CMPLT” for all test items, the
inspector will continue 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.
+ If MI 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 DTC (No DTCs) before the inspection.

SRT item
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
SRT item Required self-diagnostic items to set the SRT to
Performance Priority*1 Corresponding DTC No.
(CONSULT-II indication) “CMPLT”
CATALYST 2 Three way catalyst function P0420, P0430
Heated oxygen sensor 1 P0132, P0152
Heated oxygen sensor 1 P0133, P0153
Heated oxygen sensor 1 P0134, P0154
Heated oxygen sensor 1 P1143, P1163
HO2S 1 Heated oxygen sensor 1 P1144, P1164
Heated oxygen sensor 2 P0138, P0158
Heated oxygen sensor 2 P0139, P0159
Heated oxygen sensor 2 P1146, P1166
Heated oxygen sensor 2 P1147, P1167
P0031, P0032, P0051,
Heated oxygen sensor 1 heater
P0052
HO2S HTR 1
P0037, P0038, P0057,
Heated oxygen sensor 2 heater
P0058
*1: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the prior-
ity for models with CONSULT-II.

EC-42
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
SRT set timing
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 →
P0400 OK (1) — (1) OK (2) — (2)
P0402 OK (1) — (1) — (1) OK (2)
Case 1
P1402 OK (1) OK (2) — (2) — (2)
SRT of EGR “CMPLT” “CMPLT” “CMPLT” “CMPLT”
All OK
P0400 OK (1) — (1) — (1) — (1)
P0402 — (0) — (0) OK (1) — (1)
Case 2
P1402 OK (1) OK (2) — (2) — (2)
SRT of EGR “INCMP” “INCMP” “CMPLT” “CMPLT”
P0400 OK OK — —
P0402 — — — —
NG
P1402 NG — NG (Consecutive
NG exists Case 3
NG)
(1st trip) DTC
1st trip DTC — 1st trip DTC
DTC (= MI “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
If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also
indicate “CMPLT”. → Case 3 above
The table above shows that the minimum number of cycles for setting SRT as “INCMP” is one (1) for each
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 for each self-diagnosis to be executed twice (Case 3) for the
following reasons:
+ The SRT will indicate “CMPLT” at the time the respective self-diagnoses have one (1) OK result.
+ The emissions inspection requires “CMPLT” of the SRT only with OK self-diagnosis results.
+ When, during SRT driving pattern, 1st trip DTC (NG) is detected prior to “CMPLT” of SRT, the self-di-
agnosis memory must be erased from ECM after repair.
+ If the 1st trip DTC is erased, all the SRT will indicate “INCMP”.
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
If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”,
review the flowchart diagnostic sequence on the next page.

EC-43
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)

SEF573XB

*1EC-40 *2EC-45 *3EC-45

EC-44
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
How to display SRT code
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.
A sample of CONSULT-II display for SRT code is shown at right.
PBIB0666E
“INCMP” means the self-diagnosis is incomplete and SRT is not
set. “CMPLT” means the self-diagnosis is complete and SRT is
set.
WITH GST
Selecting Mode 1 with GST (Generic Scan Tool)
How to set SRT code
To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times.
Each 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
on EC-42, “SRT Item”.

WITHOUT CONSULT-II
The most efficient driving pattern in which SRT codes can be properly set is explained on the next page.
The driving pattern should be performed one or more times to set all SRT codes.

EC-45
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
Driving pattern

MBIB0241E

EC-46
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
+ The time required for each diagnosis varies with road surface conditions, weather, altitude, individual
driving habits, etc.
Zone A refers to the range where the time, required for the diagnosis under normal conditions*, is the
shortest.
Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed
within zone A.
*: Normal conditions refer to the following:
+ Sea level
+ Flat road
+ Ambient air temperature: 20 - 30°C (68 - 86°F)
+ Diagnosis is performed as quickly as possible under normal conditions.
Under different conditions [For example: ambient air temperature other than 20 - 30°C (68 - 86°F)],
diagnosis may also be performed.
Pattern 1:
+ 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 121 and ground is 3.0 - 4.3V).
+ 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 121 and ground is lower than 1.4V).
Pattern 2:
+ When steady-state driving is performed again even after it is interrupted, each diagnosis can be con-
ducted. In this case, the time required for diagnosis may be extended.
*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.
*2: 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.

EC-47
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
TEST VALUE AND TEST LIMIT (GST ONLY — NOT APPLICABLE TO CONSULT-II)
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 speci-
fied as the 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.
These data (test value and test limit) are specified by Test ID (TID) and Component ID (CID) and can be
displayed on the GST screen.
x: Applicable —: Not applicable

Test value (GST display)

SRT item Self-diagnostic test item Test limit Application
TID CID
01H 01H Max. x
Three way catalyst function (Bank1)
02H 81H Min. x
CATALYST
03H 02H Max. x
Three way catalyst function (Bank2)
04H 82H Min. x
09H 04H Max. x
0AH 84H Min. x
Heated oxygen sensor 1 (Bank 1) 0BH 04H Max. x
0CH 04H Max. x
0DH 04H Max. x
11H 05H Max. x
12H 85H Min. x
Heated oxygen sensor 1 (Bank 2) 13H 05H Max. x
14H 05H Max. x
HO2S
15H 05H Max. x
19H 86H Min. x
1AH 86H Min. x
Heated oxygen sensor 2 (Bank 1)
1BH 06H Max. x
1CH 06H Max. x
21H 87H Min. x
22H 87H Min. x
Heated oxygen sensor 2 (Bank 2)
23H 07H Max. x
24H 07H Max. x
29H 08H Max. x
Heated oxygen sensor 1 heater (Bank 1)
2AH 88H Min. x
2BH 09H Max. x
Heated oxygen sensor 1 heater (Bank 2)
2CH 89H Min. x
HO2S HTR
2DH 0AH Max. x
Heated oxygen sensor 2 heater (Bank 1)
2EH 8AH Min. x
2FH 0BH Max. x
Heated oxygen sensor 2 heater (Bank 2)
30H 8BH Min. x

EC-48
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION
How to Erase DTC (With CONSULT-II)
The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased indi-
vidually from the ECM and TCM (Transmission control module).
NOTE:
If the DTC is not for A/T related items (see EC-9, “INDEX FOR DTC”), skip steps 2 through 4.
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”.
3. Touch “SELF-DIAG RESULTS”.
4. Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch
“BACK” twice.
5. Touch “ENGINE”.
6. Touch “SELF-DIAG RESULTS”.
7. Touch “ERASE”. (The DTC in the ECM will be erased.)

SEF966X

EC-49
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Emission-related Diagnostic Information
(Cont’d)
How to erase DTC (With GST)
The emission related diagnostic information in the ECM can be erased by selecting Mode 4 with GST.
NOTE:
If the DTC is not for A/T related items (see EC-9, “INDEX FOR DTC”), 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.
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 diagno-
sis only to erase the DTC.)
3. Select Mode 4 with GST (Generic Scan Tool).
How to erase DTC (No Tools)
1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch OFF” once.
2. Wait at least 10 seconds and then turn it “ON” (engine stopped) again.
3. Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to
EC-52, “HOW TO SWITCH DIAGNOSTIC TEST MODE”.
+ If the battery is disconnected, the emission-related diagnostic information will be lost after
approx. 24 hours.
+ 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. 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.

NATS (Nissan Anti-theft System)

+ If the security indicator lights up with the ignition switch
in the “ON” position or “NATS MALFUNCTION” is dis-
played on “SELF-DIAG RESULTS” screen, perform self-
diagnostic results mode with CONSULT-II using NATS
program card. Refer to EL section, “NATS (NISSAN
ANTI-THEFT SYSTEM)”.
+ Confirm no self-diagnostic results of NATS is displayed
before touching “ERASE” in “SELF-DIAG RESULTS”
mode with CONSULT-II.
SEF515Y
+ When replacing ECM, initialization of NATS system and
registration of all NATS ignition 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 NATS initialization
and NATS ignition key ID registration, refer to CON-
SULT-II operation manual, NATS.

EC-50
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)

Malfunction Indicator (MI)

DESCRIPTION
The MI is located on the instrument panel.
1. The MI will light up when the ignition switch is turned ON
without the engine running. This is a bulb check.
+ If the MI does not light up, refer to EL section “WARNING
LAMPS”, or see EC-286.
2. When the engine is started, the MI should go off.
If the MI remains on, the on board diagnostic system has
SAT652J detected an engine system malfunction.

ON BOARD DIAGNOSTIC SYSTEM FUNCTION

The on board diagnostic system has the following four functions.
Diagnostic
KEY and ENG. Status Function Explanation of Function
Test Mode
Ignition switch in “ON” position

This function checks the MI bulb for damage

BULB CHECK (blown, open circuit, etc.).
Engine stopped
If the MI does not come on, check MI circuit.

This is a usual driving condition. When a malfunc-

Mode I
tion is detected twice in two consecutive driving
cycles (two trip detection logic), the MI will light up
Engine running to inform the driver that a malfunction has been
MALFUNCTION WARNING detected.
The following malfunctions will light up or blink the
MI in the 1st trip.
+ “Misfire (Possible three way catalyst damage)”
+ “One trip detection diagnoses”
Ignition switch in “ON” position

This function allows DTCs and 1st trip DTCs to be

SELF-DIAGNOSTIC RESULTS
Engine stopped read.
Mode II

Engine running This function allows the fuel mixture condition (lean
HEATED OXYGEN SENSOR 1
or rich), monitored by heated oxygen sensor 1, to
MONITOR
be read.

MI flashing without DTC

If the ECM is in Diagnostic Test Mode II, MI may flash when engine is running. In this case, check ECM
diagnostic test mode, EC-52 “HOW TO SWITCH DIAGNOSTIC TEST MODE”.
How to switch the diagnostic test (function) modes, and details of the above functions are described later,
EC-52 “HOW TO SWITCH DIAGNOSTIC TEST MODE”.
The following emission-related diagnostic information is cleared when the ECM memory is erased.
+ Diagnostic trouble codes
+ 1st trip diagnostic trouble codes
+ Freeze frame data
+ 1st trip freeze frame data
+ System readiness test (SRT) codes
+ Test values
+ Others

EC-51
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Malfunction Indicator (MI) (Cont’d)
HOW TO SWITCH DIAGNOSTIC TEST MODE
NOTE:
+ It is better to count the time accurately with a clock.
+ It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
+ Always ECM returns to Diagnostic Test Mode I after ignition switch is turned “OFF”.
How to set diagnostic test mode II (Self-diagnostic results)
1. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
2. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MI starts
blinking.
4. Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).

PBIB0092E

How to set diagnostic test mode II (Heated oxygen sensor 1 monitor)

1. Set the ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to EC-52, “How to set diagnos-
tic test mode II (Self-diagnostic results)”.
2. Start Engine.
ECM has entered to Diagnostic Test Mode II (Heated oxygen sensor 1 monitor).
ECM will start heated oxygen sensor 1 monitoring from the bank 1 sensor.

How to switch monitored sensor from bank 1 to bank 2 or vice versa

1. Fully depress the accelerator pedal quickly and then release it immediately.
2. Make sure that monitoring sensor has changed by MI blinking as follows.

PBIB0093E

How to erase diagnostic test mode II (Self-diagnostic results)

1. Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to EC-52, “How to set diagnostic test
mode II (Self-diagnostic results)”.
2. Fully depress the accelerator pedal and keep it for more than 10 seconds.
The emission-related diagnostic information has been erased from the backup memory in the ECM.
3. Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.

EC-52
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Malfunction Indicator (MI) (Cont’d)
DIAGNOSTIC TEST MODE I — BULB CHECK
In this mode, the MI on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to EL
section or see EC-286.

DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING

MI Condition
ON When the malfunction is detected.
OFF No malfunction.
+ These DTC numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)

DIAGNOSTIC TEST MODE II — SELF-DIAGNOSTIC RESULTS

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MI as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MI does not illuminate in diagnostic test
mode I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the
MI illuminates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes
are displayed, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These
unidentified codes can be identified by using the CONSULT-II or GST. A DTC will be used as an example
for how to read a code.

SEF952W

A particular trouble code can be identified by the number of four-digit numeral flashes. The “zero” is indi-
cated by the number of ten flashes. The length of time the 1,000th-digit numeral flashes on and off is 1.2
seconds consisting of an ON (0.6-second) - OFF (0.6-second) cycle.
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
later numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code 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 EC-9.)

How to erase diagnostic test mode II (Self-diagnostic results)

The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to
EC-52, “HOW TO SWITCH DIAGNOSTIC TEST MODE”.
+ If the battery is disconnected, the DTC will be lost from the backup memory after approx 24 hours.
+ Be careful not to erase the stored memory before starting trouble diagnoses.

EC-53
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
Malfunction Indicator (MI) (Cont’d)
DIAGNOSTIC TEST MODE II — HEATED OXYGEN SENSOR 1 MONITOR
In this mode, the MI displays the condition of the fuel mixture (lean or rich) which is monitored by the heated
oxygen sensor 1.
MI 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 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
MI comes ON more than 5 times within 10 seconds with engine running at 2,000 rpm under no-load.

OBD System Operation Chart

RELATIONSHIP BETWEEN MI, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS
+ 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.
+ When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
stored in the ECM memory, and the MI will come on. For details, refer to EC-37, “Two Trip Detection
Logic”.
+ The MI will go off after the vehicle is driven 3 times with no malfunction. The drive is counted only when
the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs while counting,
the counter will reset.
+ 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
(driving 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.
+ The 1st trip DTC is not displayed when the self-diagnosis results in “OK” for the 2nd trip.

SUMMARY CHART
Items Fuel Injection System Misfire Other
MI (goes off) 3 (pattern B) 3 (pattern B) 3 (pattern B)
DTC, Freeze Frame Data (no
80 (pattern C) 80 (pattern C) 40 (pattern A)
display)
1st Trip DTC (clear) 1 (pattern C), *1 1 (pattern C), *1 1 (pattern B)
1st Trip Freeze Frame Data
*1, *2 *1, *2 1 (pattern B)
(clear)
For details about patterns “B” and “C” under “Fuel Injection System” and “Misfire”, see EC-56.
For details about patterns “A” and “B” under “Other”, see EC-58.
*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-54
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
OBD System Operation Chart (Cont’d)
RELATIONSHIP BETWEEN MI, DTC, 1ST TRIP DTC AND DRIVING PATTERNS FOR
“MISFIRE” <EXHAUST QUALITY DETERIORATION>, “FUEL INJECTION SYSTEM”

SEF392SA

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

EC-55
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
OBD System Operation Chart (Cont’d)
EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM”
<Driving pattern B>
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
+ The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
+ The B counter will be counted up when driving pattern B is satisfied without any malfunction.
+ The MI will go off when the B counter reaches 3. (*2 in “OBD SYSTEM OPERATION CHART”)

<Driving pattern C>

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) x (1±0.1) [%]
Engine coolant temperature (T) condition:
+ When the freeze frame data shows lower than 70°C (158°F), “T” should be lower than 70°C (158°F).
+ 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)
+ The C counter will be cleared when the malfunction is detected regardless of (1).
+ The C counter will be counted up when (1) is satisfied without the same malfunction.
+ The DTC will not be displayed after C counter reaches 80.
+ The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC
is stored in ECM.

EC-56
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
OBD System Operation Chart (Cont’d)
RELATIONSHIP BETWEEN MI, DTC, 1ST TRIP DTC AND DRIVING PATTERNS EXCEPT
FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”

SEF393SA

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

EC-57
 ON BOARD DIAGNOSTIC (OBD)
SYSTEM TB48DE A/T (WITH EURO-OBD)
OBD System Operation Chart (Cont’d)
EXPLANATION FOR DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM”
<Driving pattern A>

AEC574

+ The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
+ The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.
+ The DTC will not be displayed after the A counter reaches 40.

<Driving pattern B>

Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
+ The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
+ The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
+ The MI will go off when the B counter reaches 3 (*2 in “OBD SYSTEM OPERATION CHART”).

EC-58
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

Trouble Diagnosis Introduction

INTRODUCTION
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 actua-
tors. It is essential that both input and output signals are proper
and stable. At the same time, it is important that there are no
malfunctions such as vacuum leaks, fouled spark plugs, or other
malfunctions with the engine.
MEF036D It is much more difficult to diagnose an incident that occurs inter-
mittently rather than continuously. Most intermittent incidents are
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 incidents. A
roadtest with CONSULT-II (or GST) or a circuit tester connected
should be performed. Follow the “Work Flow” on EC-60.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The
customer can supply good information about such incidents,
especially intermittent ones. Find out what symptoms are present
SEF233G and under what conditions they occur. A “Diagnostic Worksheet”
like the example on EC-63 should be used.
Start your diagnosis by looking for “conventional” malfunctions
first. This will help troubleshoot driveability malfunctions on an
electronically controlled engine vehicle.

SEF234G

EC-59
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Trouble Diagnosis Introduction (Cont’d)
WORK FLOW
Flow chart

MBIB0159E

*1:If time data of “SELF-DIAG SIS FOR INTERMITTENT INCIDENT”. detected, perform EC-112, “TROUBLE
RESULTS” is other than “0” or “[1t]”, *3:If the on board diagnostic system DIAGNOSIS FOR INTERMITTENT
perform EC-112, “TROUBLE DIAGNO- cannot be performed, check main INCIDENT”.
SIS FOR INTERMITTENT INCIDENT”. power supply and ground circuit. Refer *5:EC-46, “Driving Pattern”
*2:If time data of “SELF-DIAG to EC-113, “POWER SUPPLY CIR- *6:EC-108, “TROUBLE DIAGNOSIS —
RESULTS” is other than “0” or “[1t]”, CUIT FOR ECM”. SPECIFICATION VALUE”
perform EC-112, “TROUBLE DIAGNO- *4:If malfunctioning part cannot be

EC-60
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Trouble Diagnosis Introduction (Cont’d)
Description for work flow
STEP DESCRIPTION
Get detailed information about the conditions and the environment when the incident/symptom occurred using the
STEP I
“DIAGNOSTIC WORK SHEET”, EC-62.
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-49, “HOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATION”.) 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 EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
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-71.)
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 EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
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 EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
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 to the BASIC INSPECTION. (Refer to EC-66.) If CONSULT-II is available,
STEP V
perform “DATA MONITOR (SPEC)” mode with CONSULT-II and proceed to the “TROUBLE DIAGNOSIS —
SPECIFICATION VALUE”. (Refer to EC-108) (If malfunction is detected, proceed to “PERAIR/REPLACE”.) Then
perform inspections according to the Symptom Matrix Chart. (Refer to EC-71.)
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-80, 103.
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 “Circuit Inspection”
in GI section.
Repair or replace the malfunction parts.
If malfunctioning part cannot be detected, perform EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT”.
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 inci-
STEP VII dent is still detected in the final check, perform STEP VI by using a method different 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-49, “HOW TO ERASE EMISSION-RELATED DIAG-
NOSTIC INFORMATION” and AT section.)

EC-61
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Trouble Diagnosis Introduction (Cont’d)
DIAGNOSTIC WORKSHEET
Description
There are many operating conditions that lead to the malfunction
of engine components. A good grasp of such conditions can
make troubleshooting faster and more accurate.
In general, each customer feels differently about an incident. 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
SEF907L
order to organize all the information for troubleshooting.
Some conditions may cause the MI to come on steady or blink
and DTC to be detected. Examples:
+ Vehicle ran out of fuel, which caused the engine to misfire.
+ Fuel filler cap was left off or incorrectly screwed on, allowing
fuel to evaporate into the atmosphere.

EC-62
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Trouble Diagnosis Introduction (Cont’d)
Worksheet sample

MTBL0017

EC-63
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

DTC Inspection Priority Chart

If some DTCs are displayed at the same time, perform inspections one by one based on the following pri-
ority chart.
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer
to EC-121, “DTC U1000 CAN COMMUNICATION LINE”.

Priority Detected items (DTC)

+ U1000 CAN communication line
+ P0102 P0103 Mass air flow sensor
+ P0112 P0113 Intake air temperature sensor
+ P0117 P0118 Engine coolant temperature sensor
+ P0122 P0123 P0222 P0223 P1225 P1226 P1229 P2135 Throttle position sensor
+ P0327 P0328 P0332 P0333 Knock sensor
+ P0335 P1336 Crankshaft position sensor (OBD)
1
+ P0340 Camshaft position sensor
+ P0500 Vehicle speed sensor
+ P0605 ECM
+ P0705 Park/Neutral position (PNP) switch
+ P1610-P1615 NATS
+ P1706 Park/Neutral position (PNP) switch
+ P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
2 + P0031 P0032 P0051 P0052 Heated oxygen sensor 1 heater
+ P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater
+ P0132 P0133 P0134 P0152 P0153 P0154 P1143 P1144 P1163 P1164 Heated oxygen sensor 1
+ P0138 P0139 P0158 P0159 P1146 P1147 P1166 P1167 Heated oxygen sensor 2
+ P0550 Power steering pressure sensor
+ P0740 P0745 A/T solenoid valves
+ P1065 ECM power supply
+ P1111 Intake valve timing control solenoid valve
+ P1122 Electric throttle control function
+ P1124 P1126 P1128 Electric throttle control actuator
+ P1805 Brake switch
3 + P0171 P0172 P0174 P0175 Fuel injection system function
+ P0300 - P0306 Misfire
+ P0420 P0430 Three way catalyst function
+ P0444 P0445 EVAP canister purge volume control solenoid valve
+ P1121 Electric throttle control actuator
+ P1217 Engine over temperature (OVERHEAT)

EC-64
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

Fail-safe Chart
+When the DTC listed below is detected, the ECM enters fail-safe mode and the MI lights up.
DTC No. Detected items Engine operating condition in fail-safe mode
P0102
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0103
P0117 Engine coolant temperature sen- Engine coolant temperature will be determined by ECM based on the time after
P0118 sor circuit turning ignition switch “ON” or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
Condition Engine coolant temperature decided
(CONSULT-II display)
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
Except as shown above 40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated,
the cooling fan operates while engine is running.
P0122 Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle
P0123 opening in order for the idle position to be within +10 degrees.
P0222 The ECM regulates the opening speed of the throttle valve to be slower than
P0223 the normal condition.
P2135 So, the acceleration will be poor.
P1121 Electric throttle control actuator While the vehicle is driving, it slows down gradually by fuel cut. After the
(ECM detect the throttle valve is vehicle stops, the engine stalls.
stuck open.) The engine can restart in “N” or “P” position, and engine speed will not exceed
1,000 rpm or more.
P1122 Electric throttle control function ECM stops the electric throttle control actuator control, throttle valve is main-
tained at a fixed opening (approx. 5 degrees) by the return spring.
P1124 Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is main-
P1126 tained at a fixed opening (approx. 5 degrees) by the return spring.
P1128 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is main-
tained at a fixed opening (approx. 5 degrees) by the return spring
P1229 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is main-
tained at a fixed opening (approx. 5 degrees) by the return spring.
P2122 Accelerator pedal position sensor The ECM controls the electric throttle control actuator in regulating the throttle
P2123 opening in order for the idle position to be within +10 degrees.
P2127 The ECM regulates the opening speed of the throttle valve to be slower than
P2128 the normal condition.
P2138 So, the acceleration will be poor.

EC-65
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

Basic Inspection
Preparation
+ Make sure that the following parts are in (9) Engine compression
good order. (10) Throttle valve
(1) Battery + On air conditioner equipped models,
(2) Ignition system checks should be carried out while the air
(3) Engine oil and coolant levels conditioner is “OFF”.
(4) Fuses + When measuring “CO” percentage, insert
(5) ECM harness connector probe more than 40 cm (15.7 in) into tail
(6) Vacuum hoses pipe.
(7) Air intake system + Turn off headlamps, heater blower, rear
(Oil filler cap, oil level gauge, etc.) window defogger.
(8) Fuel pressure + Keep front wheels pointed straight ahead.

Precaution:
Perform Basic Inspection without electrical or mechanical
loads applied;
+ Headlamp switch is OFF,
+ Air conditioner switch is OFF,
+ Rear window defogger switch is OFF,
+ Steering wheel is in the straight-ahead position, etc.

BEFORE STARTING
1. Check service records for any recent
SEC297D repairs that may indicate a related
malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the fol-
lowing:
+ Harness connectors for improper con-
nections
+ Wiring harness for improper
connections, pinches, and cuts
+ Vacuum hoses for splits, kinks and
improper connections
+ Hoses and ducts for leaks
+ Air cleaner clogging
+ Gasket
SEF976U

.
NG
1. Start engine and warm it up until c
Repair or replace compo-
engine coolant temperature indicator nents as necessary
points the middle of gauge. according to correspond-
Ensure engine stays below 1,000 rpm. ing “Diagnostic Proce-
2. Run engine at about 2,000 rpm for dure”.
about 2 minutes under no-load.
3. Make sure that no DTC is displayed
with CONSULT-II.

. OK .

SEF977U VA A
V

EC-66
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Basic Inspection (Cont’d)
A
V D
V
. .
NG
CHECK TARGET IDLE SPEED. c PERFORM THROTTLE
VALVE CLOSED POSI-
With CONSULT-II TION LEARNING.
1. Run engine at about 2,000 rpm for 1. Stop engine.
about 2 minutes under no-load. 2. Perform EC-31,
2. Rev engine (2,000 to 3,000 rpm) two or “Throttle Valve Closed
three times under no-load, then run Position Learning”.
engine at idle speed for about 1
minute. OK
SEF978U 3. Read idle speed in “DATA MONITOR”
mode with CONSULT-II. .
675±50 rpm (in “P” or “N” position) PERFORM IDLE AIR
Without CONSULT-II VOLUME LEARNING.
Refer to EC-31, “Idle Air
1. Run engine at about 2,000 rpm for Volume Learning”.
about 2 minutes under no-load. Is “Idle Air Volume
2. Rev engine (2,000 to 3,000 rpm) two or Learning” carried out
three times under no-load, then run successfully?
engine at idle speed for about 1
minute. Yes No
3. Check idle speed.
675±50 rpm (in “P” or “N” position) . .
B
V C
V
OK
SEF058Y
C
V
.
1. Follow the construction
of “Idle Air Volume
Learning”.
2. Go to V D .

.
NG
CHECK IGNITION TIMING. c ADJUST CAMSHAFT
1. Run engine at idle. POSITION SENSOR.
2. Check ignition timing with a timing light. 1. Start engine and warm
10±5° BTDC (in “P” or “N” position) it up to normal operat-
ing temperature.
OK
SEC536DA With CONSULT-II
2. Select “TARGET IGN
TIM ADJ” in “WORK
SUPPORT”.
. 3. Touch start.
K
V 4. Adjust camshaft position
sensor using timing
light.
10°±5° BTDC
Without CON-
SULT-II
OK 2. Adjust camshaft position
D b
V sensor using timing
light.
10°±5° BTDC
SEC537D
NG
.
CHECK TIMING CHAIN
INSTALLATION.
Check timing chain instal-
lation.
Refer to “TIMING CHAIN”
in EM section.

NG
.

D b
V Repair the timing chain
installation.

EC-67
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Basic Inspection (Cont’d)
B
V
.
NG
CHECK TARGET IDLE SPEED AGAIN. c
Check the following.
+ Check camshaft position
With CONSULT-II sensor and circuit. Refer
to EC-257.
1. Start engine and warm it up to normal
If NG, repair or replace.
operating temperature.
Then go to V D .
2. Read idle speed in “DATA MONITOR”
mode with CONSULT-II. OK
675±50 rpm (in “P” or “N” position) .
CHECK ECM FUNCTION.
SEC536DA Without CONSULT-II 1. Substitute another
1. Start engine and warm it up to normal known-good ECM to
operating temperature. check ECM function.
2. Check idle speed. (ECM may be the cause
675±50 rpm (in “P” or “N” position) of an incident, but this
is the rarely the case.)
OK 2. Perform initialization of
NATS (Nissan Anti-
Theft System) and reg-
istration of NATS
(Nissan Anti-Theft Sys-
tem) ignition key IDs.
Refer to EC-50, “NATS
(Nissan Anti-Theft Sys-
tem)”.

.
D
V
J
V
. .
CHECK IGNITION TIMING. NG PERFOR THROTTLE
c
1. Run engine at idle. VALVE CLOSED POSI-
2. Check ignition timing with a timing light. TION LEARNING.
10°±5° BTDC (in “P” or “N” position) 1. Stop engine.
2. Perform EC-31,
OK “Throttle Valve Closed
Position Learning”.

.
K
V .
PERFORM IDLE AIR
VOLUME LEARNING.
Refer to EC-31, “Idle Air
Volume Learning”.
Is “Idle Air Volume
Learning” carried out
successfully?

Yes No
. .
G
V H
V
H
V
.
1. Follow the construction
of “Idle Air Volume
Learning”.
2. Go to V D .

EC-68
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Basic Inspection (Cont’d)
G
V VI
. .
NG
CHECK TARGET IDLE SPEED AGAIN. c Check the following.
+ Check camshaft position
With CONSULT-II sensor and circuit. Refer
to EC-257.
1. Start engine and warm it up to normal If NG, repair or replace.
operating temperature. Then go to V D .
2. Read idle speed in “DATA MONITOR”
mode with CONSULT-II.
675±50 rpm (in “P” or “N” position) .

Without CONSULT-II CHECK ECM FUNCTION.

SEC536DA 1. Substitute another
1. Start engine and warm it up to normal known-good ECM to
operating temperature. check ECM function.
2. Check idle speed. (ECM may be the cause
675±50 rpm (in “P” or “N” position) of a problem, but this is
the rarely the case.)
OK 2. Perform initialization of
NATS (Nissan Anti-
Theft System) and reg-
istration of NATS (Nis-
san Anti-Theft System)
ignition key IDs. Refer
to EC-50, “NATS (Nis-
san Anti-Theft System)”.
SEC537D
.
D
V
.
NG
CHECK IGNITION TIMING AGAIN. c ADJUST CAMSHAFT
1. Run engine at idle. POSITION SENSOR.
2. Check ignition timing with a timing light. 1. Start engine and warm
10±5° BTDC (in “P” or “N” position) it up to normal operat-
ing temperature.
OK
With CONSULT-II
2. Select “TARGET IGN
TIM ADJ” in “WORK
SUPPORT”.
. 3. Touch start.
K
V 4. Adjust camshaft position
sensor using timing
light.
10°±5° BTDC
Without CON-
SULT-II
OK
J b
2. Adjust camshaft position
V sensor using timing
light.
10°±5° BTDC

NG
.
CHECK TIMING CHAIN
INSTALLATION.
Check timing chain instal-
lation. Refer to EM
section, “TIMING CHAIN”.
If NG, repair the timing
chain installation. Then go
to VD .

. OK
VI

EC-69
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Basic Inspection (Cont’d)
K
V
With three way
catalyst
.
Set the diagnostic test mode II (Heated
oxygen sensor 1 monitor). Refer to
EC-52.

.
Run engine at about 2,000 rpm for about
SAT652J 2 minutes under no-load.

.
CHECK HEATED OXYGEN SENSOR 1 NG Check oxygen sensor and
c
SIGNAL. the circuit.
With CONSULT-II
OK
1. See “HO2S1 MNTR” in “DATA MONI-
TOR” mode.
2. Maintaining engine at 2,000 rpm under
no-load (engine is warmed up to nor-
mal operating temperature), check that
the monitor fluctuates between “LEAN”
and “RICH” more than 5 times during
10 seconds.
1 cycle: RICH → LEAN → RICH
2 cycles: RICH → LEAN → RICH →
LEAN → RICH
------------------------------------------------------------------ OR ------------------------------------------------------------------

Without CONSULT-II

Make sure that malfunction indicator lamp

goes on and off more than 5 times during
10 seconds at 2,000 rpm.

OK
b
.
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-49.

OK
.
INSPECTION END

EC-70
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

Symptom Matrix Chart

SYSTEM — BASIC ENGINE CONTROL SYSTEM
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

SYSTEM

ROUGH IDLE/HUNTING
— Basic engine control system Reference page

HIGH IDLE/LOW IDLE

IDLING VIBRATION

OVERCHARGING
ENGINE STALL

OVERCOOLS
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM 1P 1X HA
Fuel Fuel pump circuit 1 1 2 3 2 3 3 3 2 EC-459
Fuel pressure regulator system 2 3 4 4 4 4 4 4 4 4 EC-34
Injector circuit 1 1 2 3 2 2 2 2 2 EC-453
Evaporative emission system 3 3 4 4 4 4 4 4 4 4 EC-269
Air Positive crankcase ventilation system 3 3 4 4 4 4 4 4 4 4 1 EC-481
Incorrect idle speed adjustment 3 3 1 1 1 1 1 EC-30
EC-299
EC-301
Electric throttle control actuator 1 1 2 3 3 2 2 2 2 2 2
EC-309
EC-315
Ignition Incorrect ignition timing adjustment 3 3 1 1 1 1 1 1 EC-30
Ignition circuit 1 1 2 2 2 2 2 2 EC-428
Main power supply and ground circuit 2 2 3 3 3 3 3 3 3 2 EC-113
Cooling Cooling fan circuit 3 3 3 2 3 3 3 3 3 1 2 1 3 EC-361
Air conditioner circuit 3 2 3 3 3 3 3 3 3 3 2 HA section
1 - 6: The numbers refer to the order of inspection.

EC-71
 TROUBLE DIAGNOSIS TB48DE A/T (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

SYSTEM

ROUGH IDLE/HUNTING
— Engine control system Reference page

HIGH IDLE/LOW IDLE

IDLING VIBRATION

OVERCHARGING
ENGINE STALL

OVERCOOLS
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM 1P 1X HA
Engine con- Camshaft position sensor circuit 2 2 2 2 2 3 3 3 3 EC-257
trol Mass air flow sensor circuit 1 1 2 2 2 2 2 2 2 2 EC-140
Engine coolant temperature sensor circuit 1 1 2 3 2 3 2 2 3 2 2 EC-152
EC-235
EC-372
Throttle position sensor circuit 1 2 2 2 2 2 2 2
EC-374
EC-415
EC-401
Accelerator pedal position sensor circuit 3 2 1 2 2 EC-408
EC-421
EC-172
EC-372
Heated oxygen sensor 1 circuit 1 2 3 2 2 2 2
EC-320
EC-327
Intake valve timing control system 3 3 2 3 3 3 EC-294
Vehicle speed sensor circuit 2 3 3 3 EC-276
Knock sensor circuit 2 2 2 3 EC-247
ECM 2 2 3 3 3 3 3 3 3 3 3 EC-283
Start signal circuit 2 EC-450
Park/Neutral position switch circuit 3 3 3 3 3 EC-388
Variable Induction Air Control (VIAS) sys-
2 EC-446
tem
Electrical load signal circuit 2 3 3 EC-470
Power steering pressure sensor circuit 2 3 3 EC-278
1 - 6: The numbers refer to the order of inspection.

EC-72
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Symptom Matrix Chart (Cont’d)
SYSTEM — ENGINE MECHANICAL & OTHER
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

SYSTEM

ROUGH IDLE/HUNTING
— Engine mechanical & other Reference page

HIGH IDLE/LOW IDLE

IDLING VIBRATION

OVERCHARGING
ENGINE STALL

OVERCOOLS
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM 1P 1X HA
Fuel Fuel tank 5 FE section
Fuel piping 5 5 5 5 5 5 5
Vapor lock
5
Valve deposit
Poor fuel (Heavy weight gasoline, Low 5 5 5 5 5 5 5
octane)
—
Air Air duct 5
Air cleaner
Air leakage from air duct
(Mass air flow sensor — Electric throttle
control actuator) 5 5 5 5 5 5
Electric throttle control actuator, Throttle 5 5 5 5 5
FE section
wire
Air leakage from intake manifold/
—
Collector/Gasket
Cranking Battery
1 1 1 1 1 1 1 1 1
Alternator circuit EL section
Starter circuit 3
PNP switch 4 AT section
Drive plate 6 EM section
Engine Cylinder head
Cylinder head gasket 4
Cylinder block
6
Piston
6 6 6 6 6 6 6 6
Piston ring
Connecting rod
EM section
Bearing
Crankshaft 6
Valve Timing chain 6 6 6 6 6 6 6 6 6
mechanism Camshaft 5 5 5 5 5 5 5 5
Intake valve
6 6 6 6 6 6 6 6 6
Exhaust valve
Exhaust EM section &
Exhaust manifold/Tube/Muffler/Gasket 5 5 5 5 5
FE section
Three way catalyst* 5 5 5 5 5 5 5 5 FE section
Lubrication Oil pan/Oil strainer/Oil pump/Oil filter/Oil
gallery 5 5 5 5 5 5 5 5 5
Oil level (Low)/Filthy oil
Cooling Radiator/Hose/Radiator filler cap LC section
Thermostat 2
Water pump
5 5 5 5 4 5
Water gallery
Cooling fan 2 EC section
Coolant level (low)/Contaminated coolant MA section
NATS (Nissan Anti-Theft System) EC-50 or EL
1 1
section
1 - 6: The numbers refer to the order of inspection.

EC-73
TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

Engine Control Component Parts Location

SEC666D

EC-74
TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Engine Control Component Parts Location
(Cont’d)

SEC733D

EC-75
TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Engine Control Component Parts Location
(Cont’d)

SEC734D

EC-76
TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Engine Control Component Parts Location
(Cont’d)

SEC744D

EC-77
TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

Circuit Diagram

TEC410M

EC-78
TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Circuit Diagram (Cont’d)

TEC329M

EC-79
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

ECM Harness Connector Terminal Layout

PBIB0075E

ECM Terminals and Reference Value

PREPARATION
1. ECM is located behind the center console. For this
inspection, remove instrument lower driver panel.
2. Remove ECM harness protector.

SEC667D

3. Perform all voltage measurements with the connector con-

nected. Extend tester probe as shown to perform tests eas-
ily.
+ Open harness securing clip to make testing easily.
+ Use extreme care not to touch 2 pins at one time.
+ Data is for comparison and may not be exact.

MEC486B

ECM INSPECTION TABLE

Specification data are reference values and are measured
between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.

EC-80
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
(Cont’d)
TERMINAL WIRE
ITEM CONDITION DATA (DC voltage)
NO. COLOR
BATTERY VOLTAGE
(11 - 14V)*1

Engine is running.

Warm-up condition
Idle speed
5 BR/W Injector No. 1
6 GY/L Injector No. 2
7 BR/Y Injector No. 3 SEC984C
13 GY/R Injector No. 4 BATTERY VOLTAGE
14 BR Injector No. 5 (11 - 14V)*1
15 GY Injector No. 6
Engine is running.

Warm-up condition
Engine speed is 2,000 rpm.

SEC985C

Approximately 7.0V*1

Engine is running.

Heated oxygen Warm-up condition

8 G/Y sensor 1 heater Engine speed is below 2,800 rpm.
(bank 2)
PBIB0519E

Engine is running. BATTERY VOLTAGE

Engine speed is above 2,800 rpm. (11 - 14V)

Approximately 7.0V*1

Engine is running.

Heated oxygen Warm-up condition

9 Y/B sensor 1 heater Engine speed is below 2,800 rpm.
(bank 1)
PBIB0519E

Engine is running. BATTERY VOLTAGE

Engine speed is above 2,800 rpm. (11 - 14V)

Engine is running.

Warm-up condition
After keeping engine speed between 0 - 1.0V
3,500 and 4,000 rpm for one minute and
Heated oxygen at idle for one minute under no load
10 Y/R sensor 2 heater Engine speed is below 3,200 rpm
(bank 2)
Ignition switch “ON”

Engine stopped BATTERY VOLTAGE

Engine is running. (11 - 14V)

Engine speed is above 3,200 rpm

EC-81
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
(Cont’d)
TERMINAL WIRE
ITEM CONDITION DATA (DC voltage)
NO. COLOR
Engine is running.

Warm-up condition
After keeping engine speed between 0 - 1.0V
3,500 and 4,000 rpm for one minute and
Heated oxygen at idle for one minute under no load
11 R/G sensor 2 heater Engine speed is below 3,200 rpm
(bank 1)
Ignition switch “ON”

Engine stopped BATTERY VOLTAGE

Engine is running. (11 - 14V)

Engine speed is above 3,200 rpm

0 - 0.1V*1

Engine is running.

Warm-up condition
Idle speed
18 Y/R Ignition signal No. 1
19 G Ignition signal No. 2
20 Y Ignition signal No. 3 SEC986C
21 R/B Ignition signal No. 4 0 - 0.2V*1
29 R/G Ignition signal No. 5
30 R Ignition signal No. 6
Engine is running.

Warm-up condition
Engine speed is 2,000 rpm.

SEC987C

BATTERY VOLTAGE
Throttle control Ignition switch “OFF”
26 P/L (11 - 14V)
motor relay
Ignition switch “ON” 0 - 1.0V
Engine is running. BATTERY VOLTAGE
Idle speed (11 - 14V)
VIAS control sole-
27 LG/R
noid valve Engine is running.
0 - 1.0V
Engine speed is above 5,000 rpm.
Ignition switch “ON” 0 - 1.0V

35 Y/G MI Engine is running. BATTERY VOLTAGE

Idle speed (11 - 14V)

Ignition switch “ON”

For 5 seconds after turning ignition switch 0 - 1.0V

“ON”
41 R/Y Fuel pump relay Engine is running.

Ignition switch “ON”

BATTERY VOLTAGE
More than 5 seconds after turning ignition (11 - 14V)
switch “ON”

EC-82
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
(Cont’d)
TERMINAL WIRE
ITEM CONDITION DATA (DC voltage)
NO. COLOR
Engine is running.
Ignition switch “OFF”
0 - 1.0V
For 5 seconds after turning ignition switch
ECM relay
42 B/Y “OFF”
(Self shut-off)
Ignition switch “OFF”
BATTERY VOLTAGE
5 seconds passed after turning ignition (11 - 14V)
switch “OFF”
Ignition switch “OFF” 0V
53 W/G Ignition switch BATTERY VOLTAGE
Ignition switch “ON”
(11 - 14V)
BATTERY VOLTAGE
(11 - 14V)*1

Engine is running.

Idle speed

EVAP canister SEC990C

54 W/B purge volume con-
trol solenoid valve BATTERY VOLTAGE
(11 - 14V)*1

Engine is running.

Engine speed is about 2,000 rpm (More

than 100 seconds after starting engine).

SEC991C

Engine is running.
0 - 1.0V
Cooling fan relay Cooling fan is operating at high speed.
55 L/B
(High) Engine is running. BATTERY VOLTAGE
Cooling fan is not operating. (11 - 14V)

Engine is running.
0 - 1.0V
Cooling fan relay Cooling fan is operating.
56 L
(Low) Engine is running. BATTERY VOLTAGE
Cooling fan is not operating. (11 - 14V)

Ignition switch “ON” Approximately 0V

59 R/W Start signal
Ignition switch “START” 9 - 14V
Ignition switch “ON”
Approx. 0V
Snow mode switch is “OFF”
60 Y/G Snow mode switch
Ignition switch “ON” BATTERY VOLTAGE
Snow mode switch is “ON” (11 - 14V)

EC-83
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
(Cont’d)
TERMINAL WIRE
ITEM CONDITION DATA (DC voltage)
NO. COLOR
Approx. 2.6 - 2.7V*1

Engine is running.

Warm-up condition
Idle speed

Camshaft position SEC750D

63 B/W sensor (POS sig-
nal) Approx. 2.5 - 2.6V*1

Engine is running.

Engine speed is 2,000 rpm

SEC751D

Ignition switch “ON”

Approximately 0V
Gear position is Neutral.
80 R/PU PNP switch
Ignition switch “ON”
Approximately 5V
Except the above gear position
Approx. 0.3 - 0.6V*1

Engine is running. (Warm-up condition)

Idle speed

83 L Camshaft position SEC746D

84 L sensor (REF signal) Approx. 0.3 - 0.6V*1

Engine is running.

Engine speed is 2,000 rpm

SEC747D

Ignition switch “ON”

Engine stopped More than 0.36V

Gear position is “D”
Accelerator pedal Accelerator pedal fully released
87 W
position sensor 1 Ignition switch “ON”

Engine stopped Less than 4.75V

Gear position is “D”
Accelerator pedal fully depressed

EC-84
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
(Cont’d)
TERMINAL WIRE
ITEM CONDITION DATA (DC voltage)
NO. COLOR
Engine is running.

Refrigerant pres- Warm-up condition

88 R/G Both A/C switch and blower switch are 1.0 - 4.0V
sure sensor
“ON”
(Compressor operates)
Engine is running.
89 B Sensors’ ground Approximately 0V
Warm-up condition
Idle speed
Engine is running.
0.75 - 1.2V
Warm-up condition
Mass air flow sen- Idle speed
91 W/G
sor Engine is running.
1.7 - 2.4V
Warm-up condition
Engine speed is 2,500 rpm.
Accelerator pedal
94 LG position sensor 2 Ignition switch “ON” Approximately 2.5V
power supply
Power supply for BATTERY VOLTAGE
95 W Ignition switch “OFF”
ECM (Buck-up) (11 - 14V)
Ignition switch “ON”

Engine stopped Less than 4.75V

Gear position is “D”
Throttle position Accelerator pedal fully released
98 R/L
sensor 2 Ignition switch “ON”

Engine stopped More than 0.36V

Gear position is “D”
Accelerator pedal fully depressed
Approximately 0 - 4.8V
Intake air tempera-
99 L/W Engine is running. Output voltage varies with
ture sensor
intake air temperature.
Accelerator pedal
100 R position sensor 2 Ignition switch “ON” Approximately 0V
ground
Sensors’ power
103 Y Ignition switch “ON” Approximately 5V
supply
Engine is running.
Approximately 0V
Brake pedal fully released
106 G/Y Stop lamp switch
Engine is running. BATTERY VOLTAGE
Brake pedal fully depressed (11 - 14V)

EC-85
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
(Cont’d)
TERMINAL WIRE
ITEM CONDITION DATA (DC voltage)
NO. COLOR
Ignition switch “ON”

Engine stopped More than 0.36V

Gear position is “D”
Throttle position Accelerator pedal fully released
108 L
sensor 1 Ignition switch “ON”

Engine stopped Less than 4.75V

Gear position is “D”
Accelerator pedal fully depressed
Engine is running.
Mass air flow sen-
109 B/W Approximately 0V
sor ground Warm-up condition
Idle speed
1 - 2V
(AC range)

Engine is running.

Warm-up condition
Idle speed

Crankshaft position SEC748D

111 W
sensor (OBD) 3 - 4V
(AC range)

Engine is running.

Engine speed is 2,000 rpm.

SEC749D

Engine is running.
Heated oxygen 0 - Approximately 1.0V (Peri-
114 W
sensor 1 (bank 1) Warm-up condition odically change)
Engine speed is 2,000 rpm.
Engine is running.
Heated oxygen 0 - Approximately 1.0V (Peri-
115 W
sensor 1 (bank 2) Warm-up condition odically change)
Engine speed is 2,000 rpm.
Ignition switch “ON”

Engine stopped More than 0.18V

Gear position is “D”
Accelerator pedal Accelerator pedal fully released
117 G
position sensor 2 Ignition switch “ON”

Engine stopped Less than 2.37V

Gear position is “D”
Accelerator pedal fully depressed
Engine is running.
0.5 - 4.5V
Power steering Steering wheel is being turned
118 BR/W
pressure sensor Engine is running.
0.4 - 0.8V
Steering wheel is not being turned

EC-86
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
(Cont’d)
TERMINAL WIRE
ITEM CONDITION DATA (DC voltage)
NO. COLOR
Approximately 0 - 4.8V
Engine coolant tem-
121 LG/B Engine is running. Output voltage varies with
perature sensor
engine coolant temperature.
Engine is running.

Warm-up condition
Revving engine from idle to 3,000 rpm
Heated oxygen quickly after the following conditions are
123 W 0 - Approximately 1.0V
sensor 2 (bank 2) met
After keeping the engine speed between
3,500 and 4,000 rpm for one minute and
at idle for one minute under no load
Engine is running.

Warm-up condition
Revving engine from idle to 3,000 rpm
Heated oxygen quickly after the following conditions are
124 W 0 - Approximately 1.0V
sensor 2 (bank 1) met
After keeping the engine speed between
3,500 and 4,000 rpm for one minute and
at idle for one minute under no load
Knock sensor
125 W (Bank 1) Engine is running.
Approximately 2.5V
126 W Knock sensor Idle speed
(Bank 2)
0 - 14V*1

Ignition switch “ON”

Throttle control
151 L/W Engine stopped
motor (Open) Gear position is “D”
Accelerator pedal is depressing

PBIB1105E

Engine is running.

Warm-up condition
Engine speed is between 1,000 rpm and
4,200 rpm Approximately 0V
Intake valve timing
152 R control solenoid During high load condition
valve Vehicle speed is more than 8 km/h (5
MPH)
Engine is running. BATTERY VOLTAGE
Those other than above (11 - 14V)

153 B
156 B Engine is running.
159 B ECM ground Engine ground
165 B Idle speed
168 B

EC-87
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
(Cont’d)
TERMINAL WIRE
ITEM CONDITION DATA (DC voltage)
NO. COLOR
0 - 14V*1

Ignition switch “ON”

Throttle control
154 L/B Engine stopped
motor (Close) Gear position is “D”
Accelerator pedal is releasing

PBIB1105E

Throttle control
BATTERY VOLTAGE
157 G motor relay power Ignition switch “ON”
(11 - 14V)
supply
163 Power supply for BATTERY VOLTAGE
B/R Ignition switch “ON”
166 ECM (11 - 14V)
Ignition switch “ON” BATTERY VOLTAGE
164 PU Data link connector
CONSULT-II or GST is disconnected. (11 - 14V)

Approximately 1.7 - 2.3V

CAN communica-
171 W/R Ignition switch “ON” Output voltage varies with the
tion line
communication status.
Approximately 2.6 - 3.2V
CAN communica-
174 G/B Ignition switch “ON” Output voltage varies with the
tion line
communication status.
*1: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

EC-88
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

CONSULT-II Function
FUNCTION
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.
Self-diagnostic results Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame
data can be read and erased quickly.*1
Data monitor Input/Output data in the ECM can be read.
Data monitor (SPEC) Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the
other data monitor items can be read.
Active test Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also
shifts some parameters in a specified range.
Function test This mode is used to inform customers when their vehicle condition requires periodic maintenance.
DTC & SRT confirmation The status of system monitoring tests and the self-diagnosis status/result can be confirmed.
ECM part number ECM part number can be read.
*1: The following emission-related diagnostic information is cleared when the ECM memory is erased.
+ Diagnostic trouble codes
+ 1st trip diagnostic trouble codes
+ Freeze frame data
+ 1st trip freeze frame data
+ System readiness test (SRT) codes
+ Test values
+ Others

EC-89
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
DIAGNOSTIC TEST MODE
SELF-DIAGNOS-
DTC & SRT CON-
TIC
DATA FIRMATION
WORK RESULTS DATA
Item MONI- ACTIVE
SUP- MONI- DTC
FREEZE TOR TEST
PORT TOR SRT WORK
DTC*1 FRAME (SPEC)
STATUS SUP-
DATA
PORT
Crankshaft position sensor
x x x x
(OBD)
Camshaft position sensor x x x x
Mass air flow sensor x x x
Engine coolant temperature sen-
x x x x x
sor
Heated oxygen sensor 1 x x x x x
Heated oxygen sensor 2 x x x x x
Vehicle speed signal x x x x
Accelerator pedal position sensor x x x
Throttle position sensor x x x
INPUT

Intake air temperature sensor x x x x

Knock sensor x
ENGINE CONTROL COMPONENT PARTS

Refrigerant pressure sensor x x

Closed throttle position switch
(accelerator pedal position sen- x x
sor signal)
Air conditioner switch x x
Park/neutral position (PNP)
x x x
switch
Stop lamp switch x x x
Power steering pressure sensor x x x
Battery voltage x x
Electrical load signal x x
Injectors x x x
Power transistor (Ignition timing) x x x
Throttle control motor relay x x x
Throttle control motor x
EVAP canister purge volume
x x x x
control solenoid valve
OUTPUT

Air conditioner relay x x

Fuel pump relay x x x x
Cooling fan relay x x x x
Heated oxygen sensor 1 heater x x x x
Heated oxygen sensor 2 heater x x x x
Intake valve timing control sole-
x x x x
noid valve
Calculated load value x x x
VIAS control solenoid valve x x x
x: Applicable
*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-41, “FREEZE FRAME DATA AND 1ST TRIP
FREEZE FRAME DATA”.

EC-90
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Connect “CONSULT-II” and “CONSULT-II CONVERTER” to
data link connector, which is located under the drivers side
dash panel.
3. Turn ignition switch ON.

SAT619K

4. Touch “START (NISSAN BASED VHCL)”.

MBIB0233E

5. Touch “ENGINE”.
If “ENGINE” is not indicated, go to GI section, “CONSULT-II
Data Link Connector (DLC) Circuit”.

SEF995X

6. Perform each diagnostic test mode according to each service

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

SEF824Y

EC-91
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
WORK SUPPORT MODE
Work item
WORK ITEM CONDITION USAGE
+ FUEL PUMP WILL STOP BY TOUCHING “START”
When releasing fuel pressure from
FUEL PRESSURE RELEASE DURING IDLING.
fuel line
CRANK A FEW TIMES AFTER ENGINE STALLS.
+ THE IDLE AIR VOLUME THAT KEEPS THE
IDLE AIR VOL LEARN ENGINE WITHIN THE SPECIFIED RANGE IS When learning the idle air volume
MEMORIZED IN ECM.
+ THE COEFFICIENT OF SELF-LEARNING CON-
When clearing the coefficient of
SELF-LEARNING CONT TROL MIXTURE RATIO RETURNS TO THE ORIGI-
self-learning control value
NAL COEFFICIENT.
TARGET IDLE RPM ADJ* + IDLE CONDITION When setting target idle speed
TARGET IGN TIM ADJ* + IDLE CONDITION When adjusting target ignition timing
*: This function is not necessary in the usual service procedure.

SELF-DIAG RESULTS MODE

Self diagnostic item
Regarding items of “DTC and 1st trip DTC”, refer to EC-9, “INDEX FOR DTC”.

Freeze frame data and 1st trip freeze frame data

Freeze frame data
Description
item*1
DIAG TROUBLE CODE + The engine control component part/control system has a trouble code, it is displayed as “PXXXX”.
[PXXXX] (Refer to EC-9, “INDEX FOR DTC”.)
FUEL SYS-B1 + “Fuel injection system status” at the moment a malfunction is detected is displayed.
+ One mode in the following is displayed.
“MODE 2”: Open loop due to detected system malfunction
FUEL SYS-B2 “MODE 3”: Open loop due to driving conditions (power enrichment, deceleration enrichment)
“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 [%] + The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [°C] or + The engine coolant temperature at the moment a malfunction is detected is displayed.
[°F]
L-FUEL TRIM-B1 [%] + “Long-term fuel trim” at the moment a malfunction is detected is displayed.
+ The long-term fuel trim indicates much more gradual feedback compensation to the base fuel sched-
ule than short-term fuel trim.
S-FUEL TRIM-B1 [%] + “Short-term fuel trim” at the moment a malfunction is detected is displayed.
+ The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
schedule.
ENGINE SPEED [rpm] + The engine speed at the moment a malfunction is detected is displayed.
VHCL SPEED [km/h] or + The vehicle speed at the moment a malfunction is detected is displayed.
[mph]
B/FUEL SCHDL [msec] + The base fuel schedule at the moment a malfunction is detected is displayed.
INT/A TEMP SE [°C] or + 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.

EC-92
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
DATA MONITOR MODE
Monitored item
x: Applicable

CAN
ECM
MAIN DIAG
INPUT
Monitored item [Unit] SIG- SUP- Description Remarks
SIG-
NALS PORT
NALS
MNTR
+ Accuracy becomes poor if engine
+ Indicates the engine speed com-
speed drops below the idle rpm.
puted from the POS signal (1° sig-
ENG SPEED [rpm] x x + If the signal is interrupted while
nal) of the camshaft position sen-
the engine is running, an abnormal
sor.
value may be indicated.
+ The signal voltage of the mass air + When the engine is stopped, a
MAS A/F SE-B1 [V] x x
flow sensor is displayed. certain value is indicated.
+ “Base fuel schedule” indicates the
B/FUEL SCHDL fuel injection pulse width pro-
x
[msec] grammed into ECM, prior to any
learned on board correction.
+ When the engine is stopped, a
A/F ALPHA-B1 [%] x + The mean value of the air-fuel certain value is indicated.
ratio feedback correction factor per + This data also includes the data
A/F ALPHA-B2 [%] x cycle is indicated. for the air-fuel ratio learning con-
trol.
+ When the engine coolant tempera-
+ The engine coolant temperature ture sensor is open or short-
COOLAN TEMP/S (determined by the signal voltage circuited, ECM enters fail-safe
x x
[°C] or [°F] of the engine coolant temperature mode. The engine coolant tem-
sensor) is displayed. perature determined by the ECM
is displayed.
HO2S1 (B1) [V] x x + The signal voltage of the heated
HO2S1 (B2) [V] x oxygen sensor 1 is displayed.
HO2S2 (B1) [V] x x + The signal voltage of the heated
HO2S2 (B2) [V] x oxygen sensor 2 is displayed.
+ Display of heated oxygen sensor 1
signal during air-fuel ratio feed- + After turning ON the ignition
HO2S1 MNTR (B1)
x x back control: switch, “RICH” is displayed until
[RICH/LEAN]
RICH ... means the mixture air-fuel mixture ratio feedback con-
became “rich”, and control is being trol begins.
affected toward a leaner mixture. + When the air-fuel ratio feedback is
LEAN ... means the mixture clamped, the value just before the
HO2S1 MNTR (B2)
x became “lean”, and control is clamping is displayed continu-
[RICH/LEAN]
being affected toward a rich mix- ously.
ture.
+ Display of heated oxygen sensor 2
HO2S2 MNTR (B1) signal:
x
[RICH/LEAN] RICH ... means the amount of
oxygen after three way catalyst is + When the engine is stopped, a
relatively small. certain value is indicated.
HO2S2 MNTR (B2) LEAN ... means the amount of
x
[RICH/LEAN] oxygen after three way catalyst is
relatively large.
+ The vehicle speed computed from
VHCL SPEED SE
x x the vehicle speed signal is dis-
[km/h] or [mph]
played.

EC-93
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
CAN
ECM
MAIN DIAG
INPUT
Monitored item [Unit] SIG- SUP- Description Remarks
SIG-
NALS PORT
NALS
MNTR
+ The power supply voltage of ECM
BATTERY VOLT [V] x x
is displayed.
ACCEL SEN 1 [V] x x + The accelerator pedal position
ACCEL SEN 2 [V] x sensor signal voltage is displayed.
THRTL SEN 1 [V] x x + The throttle position sensor signal
THRTL SEN 2 [V] x voltage is displayed.
+ The intake air temperature (deter-
INT/A TEMP SE [°C] mined by the signal voltage of the
x x
or [°F] intake air temperature sensor) is
indicated.
+ Indicates [ON/OFF] condition of
the starter signal computed from
+ After starting the engine, [OFF] is
START SIGNAL the signals of the crankshaft posi-
x x displayed regardless of the starter
[ON/OFF] tion sensor (POS), camshaft posi-
signal.
tion sensor (PHASE) and battery
voltage.
+ Indicates idle position [ON/OFF]
CLSD THL POS computed by ECM according to
x x
[ON/OFF] the accelerator pedal position sen-
sor signal.
+ Indicates [ON/OFF] condition of
AIR COND SIG the air conditioner switch as deter-
x x
[ON/OFF] mined by the air conditioner sig-
nal.
+ Indicates [ON/OFF] condition from
P/N POSI SW
x x the park/neutral position (PNP)
[ON/OFF]
switch signal.
+ [ON/OFF] condition of the power
PW/ST SIGNAL steering oil pressure switch as
x x
[ON/OFF] determined by the power steering
oil pressure signal is indicated.
+ Indicates [ON/OFF] condition from
the electrical load signal.
ON ... Rear window defogger
LOAD SIGNAL switch is ON and/or lighting switch
x x
[ON/OFF] is in 2nd position.
OFF ... Both rear window defogger
switch and lighting switch are
OFF.
IGNITION SW + Indicates [ON/OFF] condition from
x
[ON/OFF] ignition switch.
BRAKE SW + Indicates [ON/OFF] condition from
x
[ON/OFF] the stop lamp switch signal.
INJ PULSE-B1
x + Indicates the actual fuel injection + When the engine is stopped, a
[msec]
pulse width compensated by ECM certain computed value is indi-
INJ PULSE-B2
according to the input signals. cated.
[msec]
+ Indicates the ignition timing com-
+ When the engine is stopped, a
IGN TIMING [BTDC] x puted by ECM according to the
certain value is indicated.
input signals.

EC-94
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
CAN
ECM
MAIN DIAG
INPUT
Monitored item [Unit] SIG- SUP- Description Remarks
SIG-
NALS PORT
NALS
MNTR
+ “Calculated load value” indicates
CAL/LD VALUE [%] the value of the current airflow
divided by peak airflow.
+ Indicates the mass airflow com-
MASS AIRFLOW puted by ECM according to the
[gzm/s] signal voltage of the mass air flow
sensor.
+ Indicates the EVAP canister purge
volume control solenoid valve con-
trol value computed by the ECM
PURG VOL C/V [%]
according to the input signals.
+ The opening becomes larger as
the value increases.
+ The control condition of the VIAS
control solenoid valve (determined
by ECM according to the input sig-
nal) is indicated.
VIAS S/V [ON/OFF]
+ OFF ... VIAS control solenoid
valve is not operating.
+ ON ... VIAS control solenoid valve
is operating.
+ The control condition of the intake
valve timing control solenoid valve
(determined by ECM according to
the input signals) is indicated.
INT/V SOL (B1) [%]
ON ... intake valve timing control
is operating.
OFF ... Intake valve timing control
is not operating.
+ The air conditioner relay control
AIR COND RLY condition (determined by ECM
x
[ON/OFF] according to the input signals) is
indicated.
+ Indicates the fuel pump relay con-
FUEL PUMP RLY
x trol condition determined by ECM
[ON/OFF]
according to the input signals.
+ Indicates the throttle control motor
THRTL RELAY relay control condition determined
x*2
[ON/OFF] by the ECM according to the input
signals.
+ Indicates the condition of the cool-
ing fan (determined by ECM
COOLING FAN according to the input signals).
[HI/LOW/OFF] HI ... High speed operation
LOW ... Low speed operation
OFF ... Stop
HO2S1 HTR (B1) + Indicates [ON/OFF] condition of
[ON/OFF] heated oxygen sensor 1 heater
HO2S1 HTR (B2) determined by ECM according to
[ON/OFF] the input signals.

EC-95
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
CAN
ECM
MAIN DIAG
INPUT
Monitored item [Unit] SIG- SUP- Description Remarks
SIG-
NALS PORT
NALS
MNTR
HO2S2 HTR (B1) + Indicates [ON/OFF] condition of
[ON/OFF] heated oxygen sensor 2 heater
HO2S2 HTR (B2) determined by ECM according to
[ON/OFF] the input signals.
+ Display the condition of idle air
volume learning
YET ... Idle air volume learning
IDL A/V LEARN
has not been performed yet.
[YET/CMPLT]
CMPLT ... Idle air volume learning
has already been performed suc-
cessfully.
TRVL AFTER MIL + Distance traveled while MI is acti-
[km] or [mile] vated.
+ Indicates the heated oxygen sen-
O2SEN HTR DTY sor 1 heater control value com-
[%] puted by the ECM according to
the input signals.
+ The signal voltage from the refrig-
AC PRESS SEN [V] x erant pressure sensor is dis-
played.
Voltage [V]
Frequency + Only “#” is displayed if item is
[msec], [Hz] or [%] unable to be measured.
+ Voltage, frequency, duty cycle or
+ Figures with “#”s are temporary
DUTY-HI pulse width measured by the
ones. They are the same figures
DUTY-LOW probe.
as an actual piece of data which
PLS WIDTH-HI was just previously measured.
PLS WIDTH-LOW
CAN COMM
x
[OK/NG]
CAN CIRC 1
x
[OK/UNKWN]
CAN CIRC 2
x
[OK/UNKWN]
CAN CIRC 3
x + These items are not displayed in
[OK/UNKWN] + Indicates the communication con-
“SELECTION FROM MENU”
CAN CIRC 4 dition of CAN communication line.
x mode.
[OK/UNKWN]
CAN CIRC 5
x
[OK/UNKWN]
CAN CIRC 6
x
[OK/UNKWN]
CAN CIRC 7
x
[OK/UNKWN]

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

EC-96
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
DATA MONITOR (SPEC) MODE
Monitored item
ECM input Main sig-
Monitored item [Unit] Description Remarks
signals nals
+ Indicates the engine speed computed
ENG SPEED [rpm] x x from the POS signal (1° signal) of the
camshaft position sensor.
+ The signal voltage of the mass air + When engine is running specification
MAS A/F SE-B1 [V] x x
flow sensor specification is displayed. range is indicated.
+ “Base fuel schedule” indicates the
B/FUEL SCHDL fuel injection pulse width programmed + When engine is running specification
x
[msec] into ECM, prior to any learned on range is indicated.
board correction.
+ When engine is running specification
A/F ALPHA-B1 [%] x + The mean value of the air-fuel ratio
range is indicated.
feedback correction factor per cycle is
+ This data also includes the data for
A/F ALPHA-B2 [%] x indicated.
the air-fuel ratio learning control.

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test item
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
+ Engine: Return to the original
+ Harness and connectors
trouble condition If trouble symptom disappears, see
FUEL INJECTION + Fuel injectors
+ Change the amount of fuel injec- CHECK ITEM.
+ Heated oxygen sensor 1
tion using CONSULT-II.
+ Engine: Return to the original
trouble condition
If trouble symptom disappears, see + Perform “Idle Air Volume Learn-
IGNITION TIMING + Timing light: Set
CHECK ITEM. ing”.
+ Retard the ignition timing using
CONSULT-II.
+ Engine: After warming up, idle + Harness and connectors
the engine. + Compression
POWER BAL- + A/C switch “OFF” + Fuel injectors
Engine runs rough or dies.
ANCE + Shift lever “N” + Power transistor
+ Cut off each injector signal one at + Spark plugs
a time using CONSULT-II. + Ignition coils
+ Ignition switch: ON + Harness and connectors
COOLING FAN* + Turn the cooling fan “ON” and Cooling fan moves and stops. + Cooling fan relay
“OFF” with CONSULT-II. + Cooling fan motor
+ Engine: Return to the original + Harness and connectors
ENG COOLANT trouble condition If trouble symptom disappears, see + Engine coolant temperature sen-
TEMP + Change the engine coolant tem- CHECK ITEM. sor
perature using CONSULT-II. + Fuel injectors
+ Ignition switch: ON (Engine
stopped)
FUEL PUMP Fuel pump relay makes the operat- + Harness and connectors
+ Turn the fuel pump relay “ON”
RELAY ing sound. + Fuel pump relay
and “OFF” using CONSULT-II
and listen to operating sound.
+ Ignition switch: ON
+ Turn solenoid valve “ON” and Solenoid valve makes an operating + Harness and connectors
VIAS SOL VALVE
“OFF” with CONSULT-II and lis- sound. + Solenoid valve
ten for operating sound.

EC-97
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
+ Engine: After warming up, run
engine at 1,500 rpm.
PURG VOL + Change the EVAP canister purge Engine speed changes according to + Harness and connectors
CONT/V volume control solenoid valve the opening percent. + Solenoid valve
opening percent using CON-
SULT-II.
+ Engine: Return to the original
+ Harness and connectors
V/T ASSIGN trouble condition If trouble symptom disappears, see
+ Intake valve timing control sole-
ANGLE + Change intake valve timing using CHECK ITEM.
noid valve
CONSULT-II.
*: Leaving cooling fan “OFF” with CONSULT-II while engine is running may cause the engine to overheat.

DTC & SRT CONFIRMATION MODE

SRT STATUS mode
For details, refer to EC-42, “SYSTEM READINESS TEST (SRT) CODE”.

SRT work support mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

DTC work support mode

Test mode Test item Condition Reference page
HO2S1 (B1) P0133, P0153 EC-172
HO2S1 (B1) P0134, P0154 EC-185
HO2S1
HO2S1 (B1) P1143, P1163 EC-320
Refer to corresponding
HO2S1 (B1) P1144, P1164 EC-327
trouble diagnosis for DTC.
HO2S2 (B1) P0139, P0159 EC-205
H02S2 HO2S2 (B1) P1146, P1166 EC-335
HO2S2 (B1) P1147, P1167 EC-348

EC-98
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)
REAL TIME DIAGNOSIS IN DATA MONITOR MODE
(RECORDING VEHICLE DATA)
Description
CONSULT-II has two kinds of triggers and they can be selected
by touching “SETTING” in “DATA MONITOR” mode.
1. “AUTO TRIG” (Automatic trigger):
+ 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
SEF705Y displayed if the malfunction is detected by ECM.
At the moment a malfunction is detected by ECM, “MONI-
TOR” in “DATA MONITOR” screen is changed to “Recording
Data ... xx%” as shown at right, and the data after the mal-
function detection 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.
SEF707X 2. “MANU TRIG” (Manual trigger):
+ DTC/1st trip DTC and malfunction item will not be displayed
automatically on CONSULT-II screen even though a mal-
function is detected by ECM.
DATA MONITOR can be performed continuously even
though a malfunction is detected.

Operation
1. “AUTO TRIG”
+ 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 mal-
function at the moment it is detected.
+ While narrowing down the possible causes, CONSULT-II
should be set in “DATA MONITOR (AUTO TRIG)” mode,
especially in case the incident is intermittent.
When you are inspecting the circuit by gently shaking (or
twisting) the suspicious connectors, components and har-
ness in the “DTC Confirmation Procedure”, the moment a
malfunction is found the DTC/1st trip DTC will be displayed.
(Refer to “Incident Simulation Tests” in GI section.)
2. “MANU TRIG”
+ If the malfunction is displayed as soon as “DATA MONITOR”
is selected, reset CONSULT-II to “MANU TRIG”. By select-
ing “MANU TRIG” you can monitor and store the data. The
data can be utilized for further diagnosis, such as a compari-
son with the value for the normal operating condition.

EC-99
TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Function (Cont’d)

PBIB0197E

EC-100
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

Generic Scan Tool (GST) Function

DESCRIPTION
Generic Scan Tool (OBDII scan tool) complying with ISO
15031-4 has 8 different functions explained below.
ISO9141 is used as the protocol.
The name “GST” or “Generic Scan Tool” is used in this service
manual.

SEF139P

FUNCTION

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, and system status information.
This mode gains access to emission-related data value which were stored by ECM dur-
MODE 2 (FREEZE DATA) ing the freeze frame. For details, refer to EC-41, “FREEZE FRAME DATA AND 1ST
TRIP FREEZE FRAME DATA”.
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:
+ Clear number of diagnostic trouble codes (MODE 1)
+ Clear diagnostic trouble codes (MODE 3)
MODE 4 CLEAR DIAG INFO + Clear trouble code for freeze frame data (MODE 1)
+ Clear freeze frame data (MODE 2)
+ Reset status of system monitoring test (MODE 1)
+ 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 test device to request specific vehicle information
MODE 9 (CALIBRATION ID)
such as Vehicle Identification Number (VIN) and Calibration IDs.

GST INSPECTION PROCEDURE

1. Turn ignition switch OFF.
2. Connect “GST” to data link connector, which is located under
the driver side dash panel near the fuse box cover.
3. Turn ignition switch ON.

SAT619K

EC-101
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Generic Scan Tool (GST) Function (Cont’d)
4. Enter the program according to instruction on the screen or
in the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.)

SEF398S

5. Perform each diagnostic mode according to each service

procedure.
For further information, see the GST Operation Manual of
the tool maker.

SEF416S

EC-102
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

CONSULT-II Reference Value in Data Monitor

Mode
Remarks:
+ Specification data are reference values.
+ 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.
MONITOR ITEM CONDITION SPECIFICATION
ENG SPEED + Tachometer: Connect Almost the same speed as the
+ Run engine and compare CONSULT-II value with the tachometer indica- tachometer indication.
tion.
MAS A/F SE-B1 + Engine: After warming up Idle Approx. 1.3 - 1.7V
+ Air conditioner switch: OFF
+ Shift lever: N 2,500 rpm Approx. 1.7 - 2.4V
+ No-load
B/FUEL SCHDL + Engine: After warming up Idle 5.0 - 5.5 msec
+ Shift lever: N
+ Air conditioner switch: OFF 2,000 rpm 5.0 - 5.5 msec
+ No-load
A/F ALPHA-B1 + Engine: After warming up Maintaining engine speed at 2,000 75% - 125%
A/F ALPHA-B2 rpm
COOLAN TEMP/S + Engine: After warming up More than 70°C (158°F)
HO2S1 (B1) + Engine: After warming up Maintaining engine speed at 2,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S1 (B2) rpm 1.0V
HO2S2 (B1) + Engine: After warming up Revving engine from idle up to 3,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S2 (B2) + Keeping the engine speed rpm quickly. 1.0V
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load
HO2S1 MNTR (B1) + Engine: After warming up Maintaining engine speed at 2,000 LEAN ←→ RICH
HO2S1 MNTR (B2) rpm Changes more than 5 times
during 10 seconds.
HO2S2 MNTR (B1) + Engine: After warming up Revving engine from idle up to 3,000 LEAN ←→ RICH
HO2S2 MNTR (B2) + Keeping the engine speed rpm quickly.
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load
VEH SPEED SE + Turn drive wheels and compare CONSULT-II value with the speedom- Almost the same speed as the
eter indication. speedometer indication
BATTERY VOLT + Ignition switch: ON (Engine stopped) 11 - 14V
ACCEL SEN1 + Ignition switch: ON Accelerator pedal: Fully released More than 0.36V
ACCEL SEN2* (engine stopped)
+ Shift lever: D Accelerator pedal: Fully depressed Less than 4.75V

THRTL SEN1 + Ignition switch: ON Accelerator pedal: Fully released More than 0.5V
THRTL SEN2* (Engine stopped)
+ Shift lever: D Accelerator pedal: Fully depressed Less than 1.5V

START SIGNAL + Ignition switch: ON → START → ON OFF → ON → OFF

CLSD THL POS + Ignition switch: ON Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF

EC-103
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Reference Value in Data Monitor
Mode (Cont’d)
MONITOR ITEM CONDITION SPECIFICATION
AIR COND SIG + Engine: After warming up, idle Air conditioner switch: OFF OFF
the engine
Air conditioner switch: ON ON
(Compressor operates.)
P/N POSI SW + Ignition switch: ON Shift lever: P or N ON
Shift lever: Except above OFF
PW/ST SIGNAL + Engine: After warming up, idle Steering wheel is in neutral position. OFF
the engine (Forward direction)
Steering wheel is turned. ON
LOAD SIGNAL + Ignition switch: ON Rear window defogger switch is ON ON
and/or lighting switch is in 2nd.
Rear window defogger switch is OFF OFF
and lighting switch is OFF.
IGNITION SW + Ignition switch: ON → OFF → ON ON → OFF → ON
BRAKE SW + Ignition switch: ON Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1 + Engine: After warming up Idle 3.0 - 4.0 msec
INJ PULSE-B2 + Shift lever: N
+ Air conditioner switch: OFF 2,000 rpm 3.0 - 4.0 msec
+ No-load
IGN TIMING + Engine: After warming up Idle 10°±5° BTDC
+ Shift lever: N
+ Air conditioner switch: OFF 2,000 rpm 25° - 45° BTDC
+ No-load
CAL/LD VALUE + Engine: After warming up Idle 10% - 35%
+ Shift lever: N
+ Air conditioner switch: OFF 2,500 rpm 10% - 35%
+ No-load
MASS AIRFLOW + Engine: After warming up Idle 3.0 - 9.0 gzm/s
+ Shift lever: N
+ Air conditioner switch: OFF 2,500 rpm 10.0 - 25.0 gzm/s
+ No-load
PURG VOL C/V + Engine: After warming up Idle 0%
+ Shift lever: N
+ Air conditioner switch: OFF 2,000 rpm 65 - 85%
+ No-load
VIAS S/V + Engine: After warming up Idle OFF
More than 5,000 rpm ON
INT/V SOL-B1 + Engine: Idle OFF
+ Engine: After warning up ON
+ Engine speed is between 1,000 rpm and 4,200 rpm
+ Vehicle speed is more than 8 km/h (5 MPH).
+ During high load condition
AIR COND RLY + Engine: After warming up, idle Air conditioner switch: OFF OFF
the engine
Air conditioner switch: ON ON
(Compressor operates)
FUEL PUMP RLY + For 1 seconds after turning ignition switch ON ON
+ Engine running or cranking
+ Except above conditions OFF
THRTL RELAY + Ignition switch: ON ON

EC-104
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
CONSULT-II Reference Value in Data Monitor
Mode (Cont’d)
MONITOR ITEM CONDITION SPECIFICATION
COOLING FAN + Engine: After warming up, idle Engine coolant temperature is 94°C OFF
the engine (201°F) or less
+ Air conditioner switch: OFF
Engine coolant temperature is LOW
+ Vehicle stopped
between 95°C (203°F) and 99°C
(210°F)
Engine coolant temperature is 100°C HIGH
(212°F) or more
HO2S1 HTR (B1) + Engine: After warming up ON
HO2S1 HTR (B2) + Engine speed: Below 2,800 rpm
+ Engine speed: Above 2,800 rpm OFF
HO2S2 HTR (B1) + Engine speed: Below 3,200 rpm after the following conditions are met. ON
HO2S2 HTR (B2) + Engine: After warming up
+ Keeping the engine speed between 3,500 and 4,000 rpm for one minute
and at idle for one minute under no load
+ Engine speed: Above 3,200 rpm OFF
TRVL AFTER MIL + Ignition switch: ON Vehicle has traveled after MI has 0 - 65,280 km
turned ON. (0 - 40,565 mile)
O2SEN HTR DTY + Engine coolant temperature when engine started: More than 80° (176°F) Approx. 50%
+ Engine speed: Below 2,800 rpm
AC PRESS SEN + Ignition switch: ON (Engine stopped) Approx. 1.6V
+ Engine: Idle 1.0 - 2.0V
+ Air conditioner switch: OFF
VEH SPEED SE + Turn drive wheels and compare speedometer indication with the CON- Almost the same speed as the
SULT-II value. CONSULT-II value
CAN COMM + Ignition switch: ON OK
CAN CIRC 1 OK
CAN CIRC 2 OK
CAN CIRC 3 UNKWN
CAN CIRC 4 OK
CAN CIRC 5 UNKWN
CAN CIRC 6 UNKWN
CAN CIRC 7 UNKWN
*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.

EC-105
 TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)

Major Sensor Reference Graph in Data

Monitor Mode
The following are the major sensor reference graphs in “DATA MONITOR” mode.

CLSD THL POS, ACCEL SEN 1, THRTL SEN 1

Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accel-
erator pedal with the ignition switch “ON” and with selector lever in “D” position.
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or
rise after “CLSD THL POS” is changed from “ON” to “OFF”.

PBIB0198E

ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), HO2S1 (B1), INJ PULSE-B1
Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)”, “HO2S1 (B1)” and
“INJ PULSE-B1” when revving engine quickly up to 4,800 rpm under no load after warming up engine suf-
ficiently.
Each value is for reference, the exact value may vary.

SEF241Y

EC-106
TROUBLE DIAGNOSIS TB48DE A/T (WITH EURO-OBD)
Major Sensor Reference Graph in Data
Monitor Mode (Cont’d)

PBIB0668E

EC-107
 TROUBLE DIAGNOSIS — SPECIFICATION
VALUE TB48DE A/T (WITH EURO-OBD)

Description
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 MONITOR (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:
+ B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board
correction)
+ A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
+ MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Testing condition
+ Vehicle driven distance: More than 5,000 km (3,017 miles)
+ Barometric pressure: 98.3 - 104.3 kPa (0.98 - 1.04 bar, 1.003 - 1.064 kg/cm2, 14.25 - 15.12 psi)
+ Atmospheric temperature: 20 - 30°C (68 - 86°F)
+ Engine coolant temperature: 75 - 95°C (167 - 203°F)
+ Transmission: Warmed-up*1
+ Electrical load: Not applied*2
+ Engine speed: Idle
*1: After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE”
(A/T fluid temperature sensor signal) indicates more than 60°C (140°F).
*2: Rear window defogger switch, air conditioner switch, lighting switch are “OFF”. Steering wheel is straight
ahead.

Inspection Procedure
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale
display.
1. Perform EC-66, “Basic Inspection”.
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.
SEF601Z
5. If NG, go to EC-109, “Diagnostic Procedure”.

EC-108
TROUBLE DIAGNOSIS — SPECIFICATION
VALUE TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure

SEF613ZD

EC-109
TROUBLE DIAGNOSIS — SPECIFICATION
VALUE TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)

SEF768Z

EC-110
TROUBLE DIAGNOSIS — SPECIFICATION
VALUE TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)

SEF615ZA

EC-111
 TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT TB48DE A/T (WITH EURO-OBD)

Description
Intermittent incidents (I/I) may occur. In many cases, the malfunction resolves itself (the part or circuit func-
tion returns to normal without intervention). It is important to realize that the symptoms described in the cus-
tomer’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 indicate the specific malfunctioning area.

Common I/I Report Situations

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 malfunctioning area.

Diagnostic Procedure
1 INSPECTION START
Erase (1st trip) DTCs. Refer to EC-49, “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
c GO TO 2.

2 CHECK GROUND TERMINALS

Check ground terminals for corroding or loose connection.
Refer to GI section, “Incident Simulation Tests”.
OK or NG
OK c GO TO 3.
NG c Repair or replace.

3 SEARCH FOR ELECTRICAL INCIDENT

Perform GI section, “Incident Simulation Tests”.
OK or NG
OK c INSPECTION END
NG c Repair or replace.

EC-112
POWER SUPPLY CIRCUIT
FOR ECM TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC243M

EC-113
 POWER SUPPLY CIRCUIT
FOR ECM TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE DATA
MINAL ITEM CONDITION
COLOR (DC voltage)
NO.

Engine is running.
Ignition switch “OFF”
0 - 1.0V
For 5 seconds after turning ignition switch
42 B/Y ECM relay (Self-shutoff) “OFF”

Ignition switch “OFF”

BATTERY VOLTAGE
A few seconds passed after turning ignition (11 - 14V)
switch “OFF”

Ignition switch “OFF” 0V

53 W/G Ignition switch
BATTERY VOLTAGE
Ignition switch “ON”
(11 - 14V)

163 BATTERY VOLTAGE

B/R Power supply for ECM Ignition switch “ON”
166 (11 - 14V)

EC-114
POWER SUPPLY CIRCUIT
FOR ECM TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)

TEC144M

EC-115
 POWER SUPPLY CIRCUIT
FOR ECM TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

156 B
159 B Engine is running.
ECM ground Engine ground
165 B Idle speed
168 B

Diagnostic Procedure
1 INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes c GO TO 11.
No c GO TO 2.

2 CHECK ECM POWER SUPPLY CIRCUIT-I

1. Turn ignition switch “OFF” and then “ON”.
2. Check voltage between ECM terminal 53 and ground with CONSULT-II or tester.

SEC817C
Voltage: Battery voltage
OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors M52, F7
+ Fuse block (J/B) connector M2
+ 10A fuse
+ Harness for open or short between ECM and fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-116
 POWER SUPPLY CIRCUIT
FOR ECM TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
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 156, 159, 165, 168 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Joint connector-7
+ Harness for open or short between ECM and ground
c Repair open circuit or short to power in harness or connectors.

6 CHECK ECM POWER SUPPLY CIRCUIT-II

1. Disconnect ECM relay.

SEC668D

2. Check voltage between ECM relay terminals 2 and 5 and ground with CONSULT-II or tester.

PBIB0071E
Voltage: Battery voltage
OK or NG
OK c GO TO 8.
NG c GO TO 7.

EC-117
 POWER SUPPLY CIRCUIT
FOR ECM TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
7 DETECT MALFUNCTIONING PART
Check the following.
+ Harness connectors E127, M21
+ 10A fuse
+ 15A fuse
+ Harness for open or short between ECM relay and battery
c Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal 42 and ECM relay terminal 1.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 10.
NG c GO TO 9.

9 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors M52, F7
+ Harness for open or short between ECM and ECM relay
c Repair open circuit or short to ground or short to power in harness or connectors.

10 CHECK ECM RELAY

Refer to EC-120.
OK or NG
OK c GO TO EC-428.
NG c Replace ECM relay.

11 CHECK ECM POWER SUPPLY CIRCUIT-III

1. Stop engine and wait at least 10 seconds.
2. Turn ignition switch “ON” and then “OFF”.
3. Check voltage between ECM terminals 163, 166 and ground with CONSULT-II or tester.

SEC819C
Voltage: After turning ignition switch “OFF”, battery voltage will exist for a few seconds, then drop approximately 0V.
OK or NG
OK c GO TO 15.
NG (Battery voltage does not GO TO 12.
exist.) c
NG (Battery voltage exists for more GO TO 14.
than a few seconds.) c

EC-118
 POWER SUPPLY CIRCUIT
FOR ECM TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
12 CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Disconnect ECM relay.

SEC668D

2. Check voltage between ECM relay terminal 7 and ground with CONSULT-II or tester.

PBIB0074E
Voltage: Battery voltage
OK or NG
OK c GO TO 14.
NG c GO TO 13.

13 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness for open or short between ECM relay and 10A fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

14 CHECK ECM POWER SUPPLY CIRCUIT-V

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 163, 166 and ECM relay terminal 6.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 16.
NG c GO TO 15.

15 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors M52, F7
+ Harness for open or short between ECM and ECM relay
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-119
 POWER SUPPLY CIRCUIT
FOR ECM TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
16 CHECK ECM RELAY
Refer to EC-120, “Component Inspection”.
OK or NG
OK c GO TO 17.
NG c 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 156, 159, 165, 168 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK c GO TO 19.
NG c GO TO 18.

18 DETECT MALFUNCTIONING PART

Check the following.
+ Joint connector-7
+ Harness for open or short between ECM and ground
c Repair open circuit or short to power in harness or connectors.

19 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
OK or NG
OK c INSPECTION END

Component Inspection
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.
Condition Continuity
12V direct current supply between
Yes
terminals 1 and 2
PBIB0077E OFF No

3. If NG, replace ECM relay.

EC-120
 DTC U1000 CAN COMMUNICATION
LINE TB48DE A/T (WITH EURO-OBD)

Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle
multiplex communication line with high data communication speed and excellent error detection ability. Many
electronic control units are equipped onto a vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with
less wiring. Each control unit transmits/receives data but selectively reads required data only.

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U1000 CAN communication line + ECM can not communicate to other con- + Harness or connectors
1000 trol units. (CAN communication line is open or
+ ECM can not communicate for more shorted).
than the specified time.

DTC Confirmation Procedure

1. Turn ignition switch “ON” and wait at least 3 seconds.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If DTC is detected, go to EC-123, “Diagnostic Procedure”.

EC-121
DTC U1000 CAN COMMUNICATION
LINE TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC258M

EC-122
 DTC U1000 CAN COMMUNICATION
LINE TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 INSPECTION START
1. Turn ignition switch “ON”.
2. Select “CAN DIAG SUPPORT MNTR” in “DATA MONITOR” mode with CONSULT-II.
3. Print out the CONSULT-II screen.

SEC575D

c Go to EL section.

EC-123
 DTC P0031, P0032, P0051, P0052 HO2S1
HEATER TB48DE A/T (WITH EURO-OBD)

Description
SYSTEM DESCRIPTION
Sensor Input Signal to ECM ECM Function Actuator
Camshaft position sensor Engine speed Heated oxygen sensor 1 heater Heated oxygen sensor 1 heater
control
Engine coolant temperature
Engine coolant temperature
sensor

The ECM performs ON/OFF duty control of the heated oxygen sensor 1 heater corresponding to the engine
speed and engine coolant temperature. The duty percent varies with engine coolant temperature when
engine is started.

OPERATION
Engine speed rpm Heated oxygen sensor 1 heater
Above 2,800 OFF
Below 2,800 ON

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 HTR (B1) + Engine: After warming up ON
HO2S1 HTR (B2) + Engine speed: Below 2,800 rpm
+ Engine speed: Above 2,800 rpm OFF

On Board Diagnosis Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0031 Heated oxygen sensor 1 The current amperage in the heated oxy- + Harness or connectors
0031 heater control circuit low gen sensor 1 heater circuit is out of the (The heated oxygen sensor 1 heater
(Bank 1) normal range. circuit is open or shorted.)
P0051 (An excessively low voltage signal is sent + Heater oxygen sensor 1 heater
0051 to ECM through the heated oxygen sensor
(Bank 2) 1 heater.)

P0032 Heated oxygen sensor 1 The current amperage in the heated oxy- + Harness or connectors
0032 heater control circuit high gen sensor 1 heater circuit is out of the (The heated oxygen sensor 1 heater
(Bank 1) normal range. circuit is shorted.)
P0052 (An excessively high voltage signal is sent + Heater oxygen sensor 1 heater
0052 to ECM through the heated oxygen sensor
(Bank 2) 1 heater.)

DTC Confirmation Procedure

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 battery voltage is between 10.5V and 16V
at idle.

EC-124
DTC P0031, P0032, P0051, P0052 HO2S1
HEATER TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
WITH CONSULT-II
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 “DATA MONITOR”
mode with CONSULT-II.
4. Start engine and run it for at least 6 seconds at idle speed.
5. If 1st trip DTC is detected, go to EC-129, “Diagnostic Proce-
dure”.

SEF058Y

WITH GST
1. Start engine and warm it up to normal operating temperature.
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. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Start engine and run it for at least 6 seconds at idle speed.
6. Select “MODE 3” with GST.
7. If DTC is detected, go to EC-129, “Diagnostic Procedure”.
+ 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-125
 DTC P0031, P0032, P0051, P0052 HO2S1
HEATER TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC409M

EC-126
 DTC P0031, P0032, P0051, P0052 HO2S1
HEATER TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Approximately 7.0V★

Engine is running.

Warm-up condition.
Engine speed is below 2,800 rpm.
Heated oxygen sensor 1
9 Y/B
heater (bank 1)
PBIB0519E

Ignition switch “ON”

Engine stopped. BATTERY VOLTAGE

Engine is running. (11 - 14V)

Engine speed is above 2,800 rpm.

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

EC-127
 DTC P0031, P0032, P0051, P0052 HO2S1
HEATER TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC414M

EC-128
 DTC P0031, P0032, P0051, P0052 HO2S1
HEATER TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Approximately 7.0V★

Engine is running.

Warm-up condition.
Engine speed is below 2,800 rpm.
Heated oxygen sensor 1
8 G/Y
heater (bank 2)
PBIB0519E

Ignition switch “ON”

Engine stopped. BATTERY VOLTAGE

Engine is running. (11 - 14V)

Engine speed is above 2,800 rpm.

★: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
1 CHECK HO2S1 POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 1 harness connector.

SEC671D
3. Turn ignition switch “ON”.
4. Check voltage between HO2S1 terminal 3 and ground with CONSULT-II or tester.

PBIB0112E
Voltage: Battery voltage
OK or NG
OK c GO TO 3.
NG c GO TO 2.

EC-129
 DTC P0031, P0032, P0051, P0052 HO2S1
HEATER TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 DETECT MALFUNCTIONING PART
Check the following.
+ Harness connectors E127, M21
+ Harness connectors M55, F35
+ Fuse block (J/B) connector E112
+ 15A fuse
+ Harness for open or short between heated oxygen sensor 1 and fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK HO2S1 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 terminal as follows.
Refer to Wiring Diagram.

MTBL1566
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK HEATED OXYGEN SENSOR 1 HEATER

Refer to EC-131, “Component Inspection”.
OK or NG
OK c GO TO 5.
NG c Replace malfunctioning heated oxygen sensor 1.

5 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-130
DTC P0031, P0032, P0051, P0052 HO2S1
HEATER TB48DE A/T (WITH EURO-OBD)

Component Inspection
HEATED OXYGEN SENSOR 1 HEATER
1. Check resistance between HO2S1 terminals as follows.
Terminal No. Resistance
2 and 3 3.3 - 4.0Ω at 20°C (68°F)
1 and 2, 3, 4 Ω
4 and 1, 2, 3 (Continuity should not exist.)

2. If NG, replace heated oxygen sensor 1.

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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

SEF249Y

EC-131
 DTC P0037, P0038, P0057, P0058 HO2S2
HEATER TB48DE A/T (WITH EURO-OBD)

Description
SYSTEM DESCRIPTION
Sensor Input Signal to ECM ECM Function Actuator
Camshaft position sensor Engine speed
Engine coolant temperature Heated oxygen sensor 2 heater
Engine coolant temperature Heated oxygen sensor 2 heater
sensor control
Mass air flow sensor Amount of intake air

The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine
speed, amount of intake air and engine coolant temperature.

OPERATION
Engine speed rpm Heated oxygen sensor 2 heater
Above 3,200 OFF
+ Below 3,200 rpm after the following conditions are met.
+ Engine: After warming up
ON
+ Keeping the engine speed between 3,500 and 4,000 rpm for
one minute and at idle for one minute under no load

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 HTR (B1) + Engine speed: Below 3,200 rpm after the following conditions are met. ON
HO2S2 HTR (B2) + Engine: After warming up
+ Keeping the engine speed between 3,500 and 4,000 rpm for one
minute and at idle for one minute under no load
+ Engine speed: Above 3,200 rpm OFF

On Board Diagnosis Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0037 Heated oxygen sensor 2 The current amperage in the heated oxy- + Harness or connectors
0037 heater control circuit low gen sensor 2 heater circuit is out of the (The heated oxygen sensor 2 heater
(Bank 1) normal range. circuit is open or shorted.)
P0057 (An excessively low voltage signal is sent + Heater oxygen sensor 2 heater
0057 to ECM through the heated oxygen sensor
(Bank 2) 2 heater.)

P0038 Heated oxygen sensor 2 The current amperage in the heated oxy- + Harness or connectors
0038 heater control circuit high gen sensor 2 heater circuit is out of the (The heated oxygen sensor 2 heater
(Bank 1) normal range. circuit is shorted.)
P0058 (An excessively high voltage signal is sent + Heater oxygen sensor 2 heater
0058 to ECM through the heated oxygen sensor
(Bank 2) 2 heater.)

DTC Confirmation Procedure

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 battery voltage is between 10.5V and 16V
at idle.
EC-132
DTC P0037, P0038, P0057, P0058 HO2S2
HEATER TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
WITH CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR”
mode with CONSULT-II.
2. Start engine and warm it up to the normal operating tempera-
ture.
3. Turn ignition switch “OFF” and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
5. Let engine idle for one minute.
6. If 1st trip DTC is detected, go to EC-137, “Diagnostic Proce-
SEF174Y dure”.
WITH GST
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.
5. Turn ignition switch “OFF” and wait at least 10 seconds.
6. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
7. Let engine idle for one minute.
8. Select “MODE 3” with GST.
9. If DTC is detected, go to EC-137, “Diagnostic Procedure”.
+ 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-133
 DTC P0037, P0038, P0057, P0058 HO2S2
HEATER TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC413M

EC-134
 DTC P0037, P0038, P0057, P0058 HO2S2
HEATER TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition
Engine speed: Below 3,200 rpm after the fol-
lowing conditions are met. 0 - 1.0V
Keeping the engine speed between 3,500 and
Heated oxygen sensor 2 4,000 rpm for one minute and at idle for one
11 R/G
heater (bank 1) minute under no load

Ignition switch “ON”

Engine stopped. BATTERY VOLTAGE

Engine is running. (11 - 14V)

Engine speed is above 3,200 rpm.

EC-135
 DTC P0037, P0038, P0057, P0058 HO2S2
HEATER TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC340M

EC-136
 DTC P0037, P0038, P0057, P0058 HO2S2
HEATER TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition
Engine speed: Below 3,200 rpm after the fol-
lowing conditions are met. 0 - 1.0V
Keeping the engine speed between 3,500 and
Heated oxygen sensor 2 4,000 rpm for one minute and at idle for one
10 Y/R
heater (bank 2) minute under no load

Ignition switch “ON”

Engine stopped. BATTERY VOLTAGE

Engine is running. (11 - 14V)

Engine speed is above 3,200 rpm.

Diagnostic Procedure
1 CHECK HO2S2 POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.

SEC669D

3. Turn ignition switch “ON”.

4. Check voltage between HO2S2 terminal 3 and ground with CONSULT-II or tester.

PBIB0112E

Voltage: Battery voltage

OK or NG
OK c GO TO 3.
NG c GO TO 2.

EC-137
 DTC P0037, P0038, P0057, P0058 HO2S2
HEATER TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 DETECT MALFUNCTIONING PART
Check the following.
+ Harness connectors E127, M21
+ Harness connectors M55, F35
+ Fuse block (J/B) connector E112
+ 15A fuse
+ Harness for open or short between heated oxygen sensor 2 and fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK HO2S2 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 HO2S2 terminal as follows.
Refer to Wiring Diagram.

MTBL1567
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK HEATED OXYGEN SENSOR 2 HEATER

Refer to EC-139, “Component Inspection”.
OK or NG
OK c GO TO 5.
NG c Replace malfunctioning heated oxygen sensor 2.

5 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-138
DTC P0037, P0038, P0057, P0058 HO2S2
HEATER TB48DE A/T (WITH EURO-OBD)

Component Inspection
HEATED OXYGEN SENSOR 2 HEATER
1. Check resistance between HO2S2 terminals as follows.
Terminal No. Resistance
2 and 3 5.0 - 7.0Ω at 25°C (77°F)
1 and 2, 3, 4 Ω
4 and 1, 2, 3 (Continuity should not exist)

2. If NG, replace heated oxygen sensor 2.

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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

SEF249Y

EC-139
 DTC P0102, P0103 MAF
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
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 film that is supplied with electric
current from the ECM. The temperature of the hot film is con-
trolled by the ECM a certain amount. The heat generated by the
hot film 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 main-
tain the temperature of the hot film as air flow increases. The
SEC266C
ECM detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1 + Engine: After warming up Idle Approx. 1.3 - 1.7V
+ Air conditioner switch: OFF
+ Shift lever: N 2,500 rpm Approx. 1.7 - 2.4V
+ No-load
CAL/LD VALUE + Engine: After warming up Idle 10% - 35%
+ Shift lever: N
+ Air conditioner switch: OFF 2,500 rpm 10% - 35%
+ No-load
MASS AIRFLOW + Engine: After warming up Idle 3.0 - 9.0 gzm/s
+ Shift lever: N
+ Air conditioner switch: OFF 2,500 rpm 10.0 - 25.0 gzm/s
+ No-load

On Board Diagnosis Logic

These self-diagnoses have the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0102 Mass air flow sensor cir- An excessively low voltage from the sen- + Harness or connectors
0102 cuit low input sor is sent to ECM when engine is run- (The sensor circuit is open or shorted.)
ning. + Intake air leaks
+ Mass air flow sensor
P0103 Mass air flow sensor cir- An excessively high voltage from the sen- + Harness or connectors
0103 cuit high input sor is sent to ECM. (The sensor circuit is open or shorted.)
+ Mass air flow sensor

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI 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.

DTC Confirmation Procedure

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.

EC-140
 DTC P0102, P0103 MAF
SENSOR TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
PROCEDURE FOR DTC P0102
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and wait at least 5 seconds.
4. If DTC is detected, go to EC-143, “Diagnostic Procedure”.

SEF058Y

With GST
Follow the procedure “With CONSULT-II” above.

PROCEDURE FOR DTC P0103

With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If DTC is detected, go to EC-143, “Diagnostic Procedure”.
If DTC is not detected, go to next step.
5. Start engine and wait at least 5 seconds.
6. If DTC is detected, go to EC-143, “Diagnostic Procedure”.
SEF058Y

With GST
Follow the procedure “With CONSULT-II” above.

EC-141
DTC P0102, P0103 MAF
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC146M

EC-142
 DTC P0102, P0103 MAF
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
1.3 - 1.7V
Warm-up condition
Idle speed
91 W/G Mass air flow sensor
Engine is running.
1.7 - 2.4V
Warm-up condition
Engine speed is 2,500 rpm.

Sensor power supply

103 Y Ignition switch “ON” Approximately 5V
(Mass air flow sensor)

Engine is running.
Sensor ground
109 B/W Approximately 0V
(Mass air flow sensor) Warm-up condition
Idle speed

Diagnostic Procedure
1 INSPECTION START
Which malfunction (P0102 or P0103) is duplicated?
P0102 or P0103
P0102 c GO TO 2.
P0103 c GO TO 3.

2 CHECK INTAKE SYSTEM

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

EC-143
 DTC P0102, P0103 MAF
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEC690C

c GO TO 4.

4 CHECK MAF SENSOR POWER SUPPLY CIRCUIT

1. Disconnect MAF sensor harness connector.

SEC688C

2. Turn ignition switch “ON”.

3. Check voltage between MAF sensor terminals 2, 4 and ground with CONSULT-II or tester.

PBIB0076E

MTBL1568
OK or NG
OK c GO TO 6.
NG c GO TO 5.

EC-144
 DTC P0102, P0103 MAF
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 DETECT MALFUNCTIONING PART
Check the following.
+ Harness connectors M52, F7
+ Harness for open or short between mass air flow sensor and ECM
+ Harness for open or short between mass air flow sensor and ECM relay
c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between MAF sensor terminal 3 and ECM terminal 109.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 7.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

7 CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between MAF sensor terminal 1 and ECM terminal 91.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 8.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK MASS AIR FLOW SENSOR

Refer to EC-146, “Component Inspection”.
OK or NG
OK c GO TO 9.
NG c Replace mass air flow sensor.

9 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-145
 DTC P0102, P0103 MAF
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Inspection
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 91 (Mass air flow sen-
sor signal) and ground.
Condition Voltage V
Ignition switch “ON” (Engine stopped.) Approx. 1.0
PBIB0078E Idle (Engine is warmed-up to normal
1.3 - 1.7
operating temperature.)
2,500 rpm (Engine is warmed-up to
1.7 - 2.4
normal operating temperature.)
Idle to about 4,000 rpm* 1.3 - 1.7 to Approx. 4.0
*: Check for liner voltage rise in response to engine being increased to about
4,000 rpm.
4. If the voltage is out of specification, proceed the following.
a. Turn ignition switch “OFF”.
b. Disconnect mass air flow sensor harness connector and
reconnect it again.
c. Perform steps 2 and 3 again.
5. If NG, remove mass air flow sensor from air duct. Check hot
film for damage or dust.
6. If NG, clean or replace mass air flow sensor.

EC-146
 DTC P0112, P0113 IAT
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
The intake air temperature sensor is built into mass air flow sen-
sor. The sensor detects intake air temperature and transmits a
signal to the ECM.
The temperature sensing unit uses a thermistor which is sensi-
tive to the change in temperature. Electrical resistance of the
thermistor decreases in response to the temperature rise.

SEC266C

<Reference data>
Intake air temperature
Voltage* V Resistance kΩ
°C (°F)
−10 (14) 4.43 7.9 - 9.3
25 (77) 3.32 1.9 - 2.1
80 (176) 1.23 0.31 - 0.37

*: These data are reference values and are measured between ECM termi-
nal 99 (Intake air temperature sensor) and ground.
SEF012P 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

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0112 Intake air temperature An excessively low voltage from the sen- + Harness or connectors
0112 sensor circuit low input sor is sent to ECM. (The sensor circuit is open or shorted.)
P0113 Intake air temperature An excessively high voltage from the sen- + Intake air temperature sensor
0113 sensor circuit high input sor is sent to ECM.

DTC Confirmation Procedure

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
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 EC-150, “Diagnostic Proce-
dure”.

SEF058Y

EC-147
DTC P0112, P0113 IAT
SENSOR TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-148
DTC P0112, P0113 IAT
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC343M

EC-149
 DTC P0112, P0113 IAT
SENSOR TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect mass air flow sensor (intake air temperature sensor is built-into) harness connector.

SEC688C
3. Turn ignition switch “ON”.
4. Check voltage between MAF sensor terminal 5 and ground.

PBIB0066E
Voltage: Approximately 5V
OK or NG
OK c GO TO 2.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

2 CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between MAF sensor terminal 3 and ECM terminal 109.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 3.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK INTAKE AIR TEMPERATURE SENSOR

Refer to EC-151, “Component Inspection”.
OK or NG
OK c GO TO 4.
NG c Replace mass air flow sensor (with intake air temperature sensor).

EC-150
 DTC P0112, P0113 IAT
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 CHECK INTERMITTENT INCIDENT
Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
INTAKE AIR TEMPERATURE SENSOR
1. Check resistance between mass air flow sensor terminals 3
and 5 under the following conditions.
Intake air temperature °C (°F) Resistance kΩ
25 (77) 1.9 - 2.1

2. If NG, replace mass air flow sensor (with intake air tempera-
ture sensor).
SEC266C

SEF012P

EC-151
 DTC P0117, P0118 ECT
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
The engine coolant temperature sensor is used to detect the
engine coolant temperature. The sensor modifies a voltage sig-
nal 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 tempera-
Voltage* V Resistance kΩ
ture °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
121 (Engine coolant temperature sensor) and ground.
SEF012P
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

These self-diagnoses have the one trip detection logic.
DTC No. Trouble Diagnosis Name DTC Detecting Condition Possible Cause
P0117 Engine coolant tempera- An excessively low voltage from the sen- + Harness or connectors
0117 ture sensor circuit low sor is sent to ECM. (The sensor circuit is open or shorted.)
input + Engine coolant temperature sensor
Engine coolant tempera-
P0118 An excessively high voltage from the sen-
ture sensor circuit high
0118 sor is sent to ECM.
input

EC-152
 DTC P0117, P0118 ECT
SENSOR TB48DE A/T (WITH EURO-OBD)
On Board Diagnosis Logic (Cont’d)
FAIL-SAFE MODE
When this malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Detected items Engine operating condition in fail-safe mode
Engine coolant tempera- Engine coolant temperature will be determined by ECM based on the time after turning ignition switch
ture sensor circuit “ON” or “START”. CONSULT-II displays the engine coolant temperature decided by ECM.
Engine coolant temperature decided
Condition
(CONSULT-II display)
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)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates
while engine is running.

DTC Confirmation Procedure

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
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If DTC is detected, go to EC-155, “Diagnostic Procedure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-153
DTC P0117, P0118 ECT
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC147M

EC-154
 DTC P0117, P0118 ECT
SENSOR TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 CHECK ECT SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant temperature (ECT) sensor harness connector.

SEC689C
3. Turn ignition switch “ON”.
4. Check voltage between ECT sensor terminal 2 and ground with CONSULT-II or tester.

SEF645R
Voltage: Approximately 5V
OK or NG
OK c GO TO 2.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

2 CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Check harness continuity between ECT sensor terminal 1 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
+ Harness for open or short between engine coolant temperature sensor and ECM
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-155
 DTC P0117, P0118 ECT
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-156, “Component Inspection”.
OK or NG
OK c GO TO 5.
NG c Replace engine coolant temperature sensor.

5 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sen-
sor terminals 1 and 2 as shown in the figure.

PBIB0353E

<Reference data>
Engine coolant tempera-
Voltage* V Resistance kΩ
ture °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
121 (Engine coolant temperature sensor) and ground.
SEF012P
2. If NG, replace engine coolant temperature sensor.

EC-156
 DTC P0122, P0123 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
Electric Throttle Control Actuator consists of throttle control
motor, throttle position sensor, etc. The throttle position sensor
responds to the throttle valve movement.
The throttle position sensor has the two sensors. These sensors
are a kind of potentiometers which transform the throttle valve
position into output voltage, and emit the voltage signal to the
ECM. In addition, these sensors detect the opening and closing
speed of the throttle valve and feed the voltage signals to the
ECM. The ECM judges the current opening angle of the throttle
PBIB0145E
valve from these signals and the ECM controls the throttle con-
trol motor to make the throttle valve opening angle properly in
response to driving condition.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
THRTL SEN1 + Ignition switch: ON Accelerator pedal: Fully released More than 0.5V
THRTL SEN2* (Engine stopped)
+ Shift lever: D Accelerator pedal: Fully depressed Less than 1.5V

*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs for ECM terminal voltage signal.

On Board Diagnosis Logic

These self-diagnoses have the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0122 Throttle position sensor 2 An excessively low voltage from the TP + Harness or connectors
0122 circuit low input sensor 2 is sent to ECM. (The TP sensor 2 circuit is open or
shorted.)
P0123 Throttle position sensor 2 An excessively high voltage from the TP + Electric throttle control actuator
0123 circuit high input sensor 2 is sent to ECM. (TP sensor 2)

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operation condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

EC-157
 DTC P0122, P0123 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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 battery voltage is more than 10V at idle.

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-160, “Diagnostic Procedure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-158
DTC P0122, P0123 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC399M

EC-159
 DTC P0122, P0123 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
89 B Sensor ground Approximately 0V
Warm-up condition
Idle speed

Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully released
98 R/L Throttle position sensor 2
Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal fully depressed

103 Y Sensor power supply Ignition switch “ON” Approximately 5V

Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal fully released
108 L Throttle position sensor 1
Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully depressed

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

SEC690C

c GO TO 2.

EC-160
 DTC P0122, P0123 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT
1. Disconnect electric throttle control actuator harness connector.

SEC182D

2. Turn ignition switch “ON”.

3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.

PBIB0082E
Voltage: Approximately 5V
OK or NG
OK c GO TO 3.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 5 and ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 98 and electric throttle control actuator terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 5.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

EC-161
 DTC P0122, P0123 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK THROTTLE POSITION SENSOR
Refer to EC-162, “Component Inspection”.
OK or NG
OK c GO TO 7.
NG c GO TO 6.

6 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform EC-31, “Throttle Valve Closed Position Learning”.
3. Turn ignition switch “ON”.
4. Set selector lever to “D” position.
5. Check voltage between ECM terminals 108 (TP sensor 1
signal), 98 (TP sensor 2 signal) and engine ground under the
following conditions.
PBIB0179E
Terminal Accelerator pedal Voltage
108 Fully released More than 0.36V
(Throttle position sensor
1) Fully depressed Less than 4.75V

98 Fully released Less than 4.75V

(Throttle position sensor
2) Fully depressed More than 0.36V

6. If NG, replace electric throttle control actuator and go to the

next step.
7. Perform EC-31, “Accelerator Pedal Released Position Learn-
ing”.
8. Perform EC-31, “Throttle Valve Closed Position Learning”.
9. Perform EC-31, “Idle Air Volume Learning”.

EC-162
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 1 is placed into the exhaust manifold.
It detects the amount of oxygen in the exhaust gas compared to
the outside air. The heated oxygen sensor 1 has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage
from approximately 1V in richer conditions to 0V in leaner con-
ditions. The heated oxygen sensor 1 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
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1) + Engine: After warming up Maintaining engine speed at 2,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S1 (B2) rpm 1.0V
HO2S1 MNTR (B1) + Engine: After warming up Maintaining engine speed at 2,000 LEAN ←→ RICH
HO2S1 MNTR (B2) rpm Changes more than 5 times
during 10 seconds.

On Board Diagnosis Logic

To judge the malfunction, the diagnosis checks that the heated
oxygen sensor 1 output is not inordinately high.

SEF301UA

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0132 Heated oxygen sensor 1 An excessively high voltage from the sen- + Harness or connectors
0132 circuit high voltage sor is sent to ECM. (The sensor circuit is open or shorted).
(Bank 1) + Heated oxygen sensor 1
P0152
0152
(Bank 2)

EC-163
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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
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”.
4. Select “DATA MONITOR” mode with CONSULT-II.
5. Restart engine and let it idle for 2 minutes.
6. If 1st trip DTC is detected, go to EC-168, “Diagnostic Proce-
dure”.

SEF174Y

WITH GST
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 2 minutes.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Restart engine and let it idle for 2 minutes.
6. Select “MODE 3” with GST.
7. If DTC is detected, go to EC-168, “Diagnostic Procedure”.
+ 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-164
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC408M

EC-165
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Heated oxygen sensor 1 0 - Approximately 1.0V
115 W
(bank 1) Warm-up condition (Periodically change)
Engine speed is 2,000 rpm.

EC-166
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC412M

EC-167
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Heated oxygen sensor 1 0 - Approximately 1.0V
114 W
(bank 2) Warm-up condition (Periodically change)
Engine speed is 2,000 rpm.

Diagnostic Procedure
1 RETIGHTEN HEATED OXYGEN SENSOR 1
1. Turn ignition switch “OFF”.
2. Loosen and retighten corresponding heated oxygen sensor 1.

SEC888C

Tightening torque: 40 - 60 Nzm (4.1 - 6.2 kg-m, 30 - 44 ft-lb)

c GO TO 2.

2 CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT

1. Disconnect heated oxygen sensor 1 harness connector.

SEC671D

2. Disconnect ECM harness connector.

3. Check harness continuity between HO2S1 terminal 4 and ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 4.
NG c GO TO 3.

EC-168
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 DETECT MALFUNCTIONING PART
Check the following.
+ Joint connector-7
+ Harness for open or short between HO2S1 and ground
c Repair open circuit or short to power in harness or connectors.

4 CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.

MTBL1569
Continuity should exist.
2. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

MTBL1570
Continuity should not exist.
3. Also check harness for short to power.

OK or NG
OK c GO TO 5.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK HO2S1 CONNECTOR FOR WATER

Check heated oxygen sensor 1 connectors for water.
Water should not exist.

OK or NG
OK c GO TO 6.
NG c Repair or replace harness or connectors.

6 CHECK HEATED OXYGEN SENSOR 1

Refer to EC-170, “Component Inspection”.

OK or NG
OK c GO TO 7.
NG c Replace malfunctioning heated oxygen sensor 1.

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-169
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)

Component Inspection
HEATED OXYGEN SENSOR 1
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.

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

SEF647Y

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.
+ 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.

EC-170
 DTC P0132, P0152
HO2S1 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115 [HO2S1
(B1) signal] or 114 [HO2S1 (B2) signal] and engine ground.
3. Check the following with engine speed held at 2,000 rpm
constant under no load.
+ The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
+ The maximum voltage is over 0.6V at least one time.
+ The minimum voltage is below 0.3V at least one time.
SEC184DA + The voltage never exceeds 1.0V.
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
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-171
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 1 is placed into the exhaust manifold.
It detects the amount of oxygen in the exhaust gas compared to
the outside air. The heated oxygen sensor 1 has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage
from approximately 1V in richer conditions to 0V in leaner con-
ditions. The heated oxygen sensor 1 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
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1) + Engine: After warming up Maintaining engine speed at 2,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S1 (B2) rpm 1.0V
HO2S1 MNTR (B1) + Engine: After warming up Maintaining engine speed at 2,000 LEAN ←→ RICH
HO2S1 MNTR (B2) rpm Changes more than 5 times
during 10 seconds.

On Board Diagnosis Logic

To judge the malfunction of heated oxygen sensor 1, this diag-
nosis measures response time of heated oxygen sensor 1 sig-
nal. The time is compensated by engine operating (speed and
load), fuel feedback control constant, and heated oxygen sensor
1 temperature index. Judgment is based on whether the com-
pensated time (heated oxygen sensor 1 cycling time index) is
inordinately long or not.

SEF010V

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0133 Heated oxygen sensor 1 The response of the voltage signal from + Harness or connectors
0133 circuit slow response the sensor takes more than the specified (The sensor circuit is open or shorted.)
(Bank 1) time. + Heated oxygen sensor 1
+ Heated oxygen sensor 1 heater
+ Fuel pressure
+ Injectors
P0153 + Intake air leaks
0153 + Exhaust gas leaks
(Bank 2) + PCV valve
+ Mass air flow sensor

EC-172
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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:
+ Always perform at a temperature above −10°C (14°F).
+ Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.

WITH CONSULT-II
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) P0133” or
“HO2S1 (B2) P0153” of “HO2S1” in “DTC WORK SUP-
PORT” 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 2,800 rpm after this step. If
the engine speed limit is exceeded, return to step 5.

SEF338Z

6. When the following conditions are met, “TESTING” will be

displayed on the CONSULT-II screen. Maintain the condi-
tions continuously until “TESTING” changes to “COM-
PLETED”. (It will take approximately 20 to 50 seconds.)
ENG SPEED 1,550 - 2,500 rpm
Vehicle speed More than 80 km/h (50 MPH)
B/FUEL SCHDL 5 - 16.7 msec
Selector lever Suitable position

SEF339Z
If “TESTING” is not displayed after 5 minutes, retry from
step 2.

EC-173
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)

7. Make sure that “OK” is displayed after touching “SELF-DIAG

RESULTS”. If “NG” is displayed, refer to EC-178, “Diagnos-
tic Procedure”.

SEF658Y

Overall Function Check

Use this procedure to check the overall function of the heated
oxygen sensor 1 circuit. During this check, a DTC might not be
confirmed.

WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115
[HO2S1(B1) signal] or 114 [HO2S1(B2) signal] and engine
ground.

3. Check the following with engine speed held at 2,000 rpm

constant under no load.
— The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
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
→ 0 - 0.3V
4. If NG, go to EC-178, “Diagnostic Procedure”.

SEC184DA

EC-174
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC408M

EC-175
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Heated oxygen sensor 1 0 - Approximately 1.0V
115 W
(bank 1) Warm-up condition (Periodically change)
Engine speed is 2,000 rpm.

EC-176
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC412M

EC-177
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Heated oxygen sensor 1 0 - Approximately 1.0V
114 W
(bank 2) Warm-up condition (Periodically change)
Engine speed is 2,000 rpm.

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

SEC690C

c GO TO 2.

2 RETIGHTEN HEATED OXYGEN SENSOR 1

Loosen and retighten heated oxygen sensor 1.
Tightening torque: 40 - 60 Nzm (4.1 - 6.2 kg-m, 30 - 44 ft-lb)

SEC888C

c GO TO 3.

EC-178
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK FOR EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (Manifold).

SEC502D
OK or NG
OK c GO TO 4.
NG c 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 c GO TO 5.
NG c Repair or replace.

EC-179
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 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”.

SEF215Z
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.

SEC688C
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure that DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-49, “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
7. Make sure that DTC P0000 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 c Perform trouble diagnosis for DTC P0171, P0174 or DTC P0172, P0175 (Refer to EC-218
or EC-227).
No c GO TO 6.

EC-180
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
6 CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 1 harness connector.

SEC671D

3. Disconnect ECM harness connector.

4. Check harness continuity between HO2S1 terminal 4 and ground.
Refer to Wiring Diagram.
Continuity should exist.

5. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 8.
NG c GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
+ Joint connector-7
+ Harness for open or short between HO2S1 and ground
c Repair open circuit or short to power in harness or connectors.

EC-181
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
8 CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.

MTBL1571
Continuity should exist.

2. Check harness continuity between the following terminals and ground.

Refer to Wiring Diagram.

MTBL1572
Continuity should not exist.
3. Also check harness for short to power.
OK or NG
OK c GO TO 9.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

9 CHECK HEATED OXYGEN SENSOR 1 HEATER

Refer to EC-131, “Component Inspection”.
OK or NG
OK c GO TO 9.
NG c Replace malfunctioning heated oxygen sensor 1.

10 CHECK MASS AIR FLOW SENSOR

Refer to EC-146, “Component Inspection”.
OK or NG
OK c GO TO 11.
NG c Replace mass air flow sensor.

11 CHECK PCV VALVE

Refer to EC-482, “Component Inspection”.
OK or NG
OK c GO TO 12.
NG c Replace PCV valve.

12 CHECK HEATED OXYGEN SENSOR 1

Refer to EC-183, “Component Inspection”.
OK or NG
OK c GO TO 13.
NG c Replace malfunctioning heated oxygen sensor 1.

EC-182
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
13 CHECK INTERMITTENT INCIDENT
Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
HEATED OXYGEN SENSOR 1
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.

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

SEF647Y

SEF648Y

EC-183
 DTC P0133, P0153
HO2S1 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115 [HO2S1
(B1) signal] or 114 [HO2S1 (B2) signal] and engine ground.
3. Check the following with engine speed held at 2,000 rpm
constant under no load.
+ The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
+ The maximum voltage is over 0.6V at least one time.
+ The minimum voltage is below 0.3V at least one time.
SEC184DA + The voltage never exceeds 1.0V.
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
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-184
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 1 is placed into the exhaust manifold.
It detects the amount of oxygen in the exhaust gas compared to
the outside air. The heated oxygen sensor 1 has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage
from approximately 1V in richer conditions to 0V in leaner con-
ditions. The heated oxygen sensor 1 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
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1) + Engine: After warming up Maintaining engine speed at 2,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S1 (B2) rpm 1.0V
HO2S1 MNTR (B1) + Engine: After warming up Maintaining engine speed at 2,000 LEAN ←→ RICH
HO2S1 MNTR (B2) rpm Changes more than 5 times
during 10 seconds.

On Board Diagnosis Logic

Under the condition in which the heated oxygen sensor 1 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
diagnosis checks that this time is not inordinately long.

SEF237U

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0134 Heated oxygen sensor 1 The voltage from the sensor is constantly + Harness or connectors
0134 circuit no activity detected approx. 0.3V. (The sensor circuit is open or shorted.)
(Bank 1) + Heated oxygen sensor 1
P0154
0154
(Bank 2)

EC-185
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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:
Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “HO2S1 (B1) P0134” or “HO2S1 (B2) P0154” of
“HO2S1” in “DTC WORK SUPPORT” mode with CONSULT-
II.
3. Touch “START”.
4. Let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 2,800 rpm after this step. If
the engine speed limit is exceeded, return to step 4.
PBIB0544E

5. When the following conditions are met, “TESTING” will be

displayed on the CONSULT-II screen. Maintain the condi-
tions continuously until “TESTING” changes to “COM-
PLETED”. (It will take approximately 10 to 60 seconds.)
ENG SPEED 1,550 - 2,500 rpm
Vehicle speed More than 64 km/h (40 MPH)
B/FUEL SCHDL 5 - 16.7 msec
Selector lever Suitable position

PBIB0545E
If “TESTING” is not displayed after 5 minutes, retry from
step 2.

6. Make sure that “OK” is displayed after touching “SELF-DIAG

RESULTS”. If “NG” is displayed, refer to EC-191, “Diagnos-
tic Procedure”.

SEC750C

EC-186
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)

Overall Function Check

Use this procedure to check the overall function of the heated
oxygen sensor 1 circuit. During this check, a DTC might not be
confirmed.

WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115 [HO2S1
(B1) signal] or 114 [HO2S1 (B2) signal] and engine ground.

3. Check the following with engine speed held at 2,000 rpm

constant under no load.
— The voltage does not remain in the range of 0.2 to 0.4V.
4. If NG, go to EC-191, “Diagnostic Procedure”.

SEC184DA

EC-187
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC408M

EC-188
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Heated oxygen sensor 1 0 - Approximately 1.0V
115 W
(bank 1) Warm-up condition (Periodically change)
Engine speed is 2,000 rpm.

EC-189
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC412M

EC-190
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Heated oxygen sensor 1 0 - Approximately 1.0V
114 W
(bank 2) Warm-up condition (Periodically change)
Engine speed is 2,000 rpm.

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

SEC690C

c GO TO 2.

2 CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT

1. Disconnect heated oxygen sensor 1 harness connector.

SEC888C
2. Disconnect ECM harness connector.
3. Check harness continuity between HO2S1 terminal 4 and ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 4.
NG c GO TO 3.

EC-191
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 DETECT MALFUNCTIONING PART
Check the following.
+ Joint connector-7
+ Harness for open or short between HO2S1 and ground
c Repair open circuit or short to power in harness or connectors.

4 CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.

MTBL1573
Continuity should exist.
2. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

MTBL1574
Continuity should not exist.
3. Also check harness for short to power.
OK or NG
OK c GO TO 5.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK HEATED OXYGEN SENSOR 1

Refer to EC-193, “Component Inspection”.
OK or NG
OK c GO TO 6.
NG c Replace malfunctioning heated oxygen sensor 1.

6 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-192
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)

Component Inspection
HEATED OXYGEN SENSOR 1
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.

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

SEF647Y

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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-193
 DTC P0134, P0154
HO2S1 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115 [HO2S1
(B1) signal] or 114 [HO2S1 (B2) signal] and engine ground.
3. Check the following with engine speed held at 2,000 rpm
constant under no load.
+ The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
+ The maximum voltage is over 0.6V at least one time.
+ The minimum voltage is below 0.3V at least one time.
SEC184DA + The voltage never exceeds 1.0V.
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
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-194
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 2, 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
are shifted, the air-fuel ratio is controlled to stoichiometric, by the
signal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
Under normal conditions the heated oxygen sensor 2 is not used
SEF327R
for engine control operation.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1) + Engine: After warming up Revving engine from idle to 3,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S2 (B2) + Keeping the engine speed rpm quickly. 1.0V
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load
HO2S2 MNTR (B1) + Engine: After warming up Revving engine from idle to 3,000 LEAN ←→ RICH
HO2S2 MNTR (B2) + Keeping the engine speed rpm quickly.
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load

On Board Diagnosis Logic

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the heated oxygen sensor 1. The
oxygen storage capacity before the three way catalyst (manifold)
causes the longer switching time. To judge the malfunctions of
heated oxygen sensor 2, ECM monitors whether the voltage is
unusually high during the various driving condition such as fuel-
cut.

SEF305UA

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0138 Heated oxygen sensor 2 An excessively high voltage from the sen- + Harness or connectors
0138 circuit high voltage sor is sent to ECM. (The sensor circuit is open or shorted.)
(Bank 1) + Heated oxygen sensor 2
P0158
0158
(Bank 2)

EC-195
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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
1. Turn ignition switch “ON” and select “DATA MONITOR”
mode with CONSULT-II.
2. Start engine and warm it up to the normal operating tempera-
ture.
3. Turn ignition switch “OFF” and wait at least 10 seconds.

4. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
5. Let engine idle for two minutes.
6. If 1st trip DTC is detected, go to EC-200, “Diagnostic Proce-
dure”.

SEF174Y

WITH GST
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for two minutes.
5. Turn ignition switch “OFF” and wait at least 10 seconds.
6. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
7. Let engine idle for two minutes.
8. Select “Mode 3” with GST.
9. If NG, go to EC-200, “Diagnostic Procedure”.
+ 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-196
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC411M

EC-197
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition
Heated oxygen sensor 2 Revving engine from idle to 3,000 rpm quickly
124 W after the following conditions are met. 0 - Approximately 1.0V
(bank 1)
Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

EC-198
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC336M

EC-199
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition
Heated oxygen sensor 2 Revving engine from idle to 3,000 rpm quickly
123 W after the following conditions are met. 0 - Approximately 1.0V
(bank 2)
Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

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

SEC690C

c GO TO 2.

EC-200
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.

SEC669D
3. Disconnect ECM harness connector.
4. Check harness continuity between HO2S2 terminal 4 and ground.
Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
+ Joint connector-7
+ Harness for open or short between HO2S2 and ground
c Repair open circuit or short to power in harness or connectors.

EC-201
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.

MTBL1575
Continuity should exist.

2. Check harness continuity between the following terminals and ground.

Refer to Wiring Diagram.

MTBL1576
Continuity should not exist.

3. Also check harness for short to power.

OK or NG
OK c GO TO 5.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK HEATED OXYGEN SENSOR 2

Refer to EC-203, “Component Inspection”.
OK or NG
OK c GO TO 6.
NG c Replace heated oxygen sensor 2.

6 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-202
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)

Component Inspection
HEATED OXYGEN SENSOR 2
With CONSULT-II
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.

5. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and

select “HO2S2 (B1)/(B2)” as the monitor item with CON-
SULT-II.

SEF662Y

6. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting

“FUEL INJECTION” to ±25%.

SEF972YA

“HO2S2 (B1)/(B2)” should be above 0.68V at least once

when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V 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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

Without CONSULT-II
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.

EC-203
 DTC P0138, P0158
HO2S2 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
5. Set voltmeter probes between ECM terminal 124 [HO2S2
(B1) signal] or 123 [HO2S2 (B2) signal] and engine ground.

6. 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 pos-
sible.)
The voltage should be above 0.68V at least once during
this procedure.
If the voltage is above 0.68V at step 6, step 7 is not nec-
essary.
7. Keep vehicle idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in
SEC774D “D” position with “OD” OFF.
The voltage should be below 0.48V at least once during
this procedure.
8. If NG, replace heated oxygen sensor 2.
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-204
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 2, 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
are shifted, the air-fuel ratio is controlled to stoichiometric, by the
signal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
Under normal conditions the heated oxygen sensor 2 is not used
SEF327R
for engine control operation.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1) + Engine: After warming up Revving engine from idle to 3,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S2 (B2) + Keeping the engine speed rpm quickly. 1.0V
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load
HO2S2 MNTR (B1) + Engine: After warming up Revving engine from idle to 3,000 LEAN ←→ RICH
HO2S2 MNTR (B2) + Keeping the engine speed rpm quickly.
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load

On Board Diagnosis Logic

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the heated oxygen sensor 1. The
oxygen storage capacity before the three way catalyst (manifold)
causes the longer switching time. To judge the malfunctions of
heated oxygen sensor 2, ECM monitors whether the switching
response of the sensor’s voltage is faster than specified during
the various driving condition such as fuel-cut.

SEF302U

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0139 Heated oxygen sensor 2 It takes more time for the sensor to + Harness or connectors
0139 circuit slow response respond between rich and lean than the (The sensor circuit is open or shorted.)
(Bank 1) specified time. + Heated oxygen sensor 2
P0159 + Fuel pressure
0159 + Injectors
(Bank 2) + Intake air leaks

EC-205
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
+ “COMPLETED” will appear on CONSULT-II screen when all tests “COND1”, “COND2” and
“COND3” are completed.
+ 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:
Never stop engine during this procedure. If the engine is stopped, retry this procedure from step 2
in “Procedure for COND1”.
WITH CONSULT-II
Procedure for COND1
For the best results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30°C (32 to 86°F)
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.
4. Let engine idle one minute.
5. Select “HO2S2 (B1) P0139” or “HO2S2 (B2) P0159” of “HO2S2” in “DTC WORK SUPPORT” mode with
CONSULT-II.
6. Touch “START”.
7. Let engine idle for at least 30 seconds.
8. 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.
9. When the following conditions are met, “TESTING” will be displayed at “COND1” on the CONSULT-II
screen. Maintain the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take
approximately 60 seconds.)
ENG SPEED More than 1,000 rpm
B/FUEL SCHDL More than 1.0 msec
COOLANT TEMP/S 70 - 100°C
Selector level Suitable position

PBIB0552E

NOTE:
+ If “TESTING” is not displayed after 5 minutes, retry from step 2 in “Procedure for COND1”.
+ If “COMPLETED” already appears at “COND2” on CONSULT-II screen before “Procedure for
COND2” is conducted, it is unnecessary to conduct step 1 in “Procedure for COND2”.

EC-206
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
Procedure for COND2
1. While driving, release accelerator pedal completely with “OD”
OFF from the above condition [step 9] until “INCOMPLETE”
at “COND2” on CONSULT-II screen has turned to “COM-
PLETED”. (It will take approximately 4 seconds.)
NOTE:
If “COMPLETED” already appears at “COND3” on CON-
SULT-II screen before “Procedure for COND3” is conducted,
it is unnecessary to conduct step 1 in “Procedure for
COND3”.
PBIB0553E

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 EC-212, “Diagnostic Procedure”.
If “CAN NOT BE DIAGNOSED” is displayed, perform the fol-
lowing.
a. Turn ignition switch “OFF” and leave the vehicle in a cool
SEF668Y place (soak the vehicle).
b. Turn ignition switch “ON” and select “COOLANTEMP/S” in
“DATA MONITOR” mode with CONSULT-II.
c. Start engine and warm it up while monitoring
“COOLANTEMP/S” indication on CONSULT-II.
d. When “COOLANTEMP/S” indication reaches to 70°C
(158°F), go to “Procedure for COND 1” step 3.

Overall Function Check

Use this procedure to check the overall function of the heated
oxygen sensor 2 circuit. During this check, a DTC might not be
confirmed.

WITH GST
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.
5. Set voltmeter probes between ECM terminal 124 [HO2S2
(B1) signal] or 123 [HO2S2 (B2) signal] and engine ground.

6. 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 pos-
sible.)
A change of voltage should be more than 0.06V for 1
second during this procedure.
If the voltage can be confirmed in step 6, step 7 is not
necessary.
7. Keep vehicle at idling for 10 minutes, then check the voltage.
Or check the voltage when coasting from 80 km/h (50 MPH)
SEC774D

EC-207
DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Overall Function Check (Cont’d)
in “D” position with “OD” OFF.
A change of voltage should be more than 0.06V for 1
second during this procedure.
8. If NG, go to EC-212, “Diagnostic Procedure”.

EC-208
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC411M

EC-209
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition
Heated oxygen sensor 2 Revving engine from idle to 3,000 rpm quickly
124 W after the following conditions are met. 0 - Approximately 1.0V
(bank 1)
Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

EC-210
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC336M

EC-211
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition
Heated oxygen sensor 2 Revving engine from idle to 3,000 rpm quickly
123 W after the following conditions are met. 0 - Approximately 1.0V
(bank 2)
Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

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

SEC690C

c GO TO 2.

EC-212
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
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”.

SEF215Z
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.

SEC688C
5. Make sure that DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-49, “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
7. Make sure that DTC P0000 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 c Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-218 or
EC-227.
No c GO TO 3.

EC-213
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.

SEC669D
3. Disconnect ECM harness connector.
4. Check harness continuity between HO2S2 terminal 4 and ground.
Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 5.
NG c GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
+ Joint connector-7
+ Harness for open or short between HO2S2 and ground
c Repair open circuit or short to power in harness or connectors.

EC-214
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.

MTBL1577
Continuity should exist.

2. Check harness continuity between the following terminals and ground.

Refer to Wiring Diagram.

MTBL1578
Continuity should not exist.
3. Also check harness for short to power.

OK or NG
OK c GO TO 6.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK HEATED OXYGEN SENSOR 2

Refer to EC-215, “Component Inspection”.
OK or NG
OK c GO TO 7.
NG c Replace heated oxygen sensor 2.

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
HEATED OXYGEN SENSOR 2
With CONSULT-II
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.

EC-215
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
5. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and
select “HO2S2 (B1)/(B2)” as the monitor item with CON-
SULT-II.

SEF662Y

6. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting

“FUEL INJECTION” to ±25%.

SEF972YA

“HO2S2 (B1)/(B2)” should be above 0.68V at least once

when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V 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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

Without CONSULT-II
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.
5. Set voltmeter probes between ECM terminal 124 [HO2S2
(B1) signal] or 123 [HO2S2 (B2) signal] and engine ground.

EC-216
 DTC P0139, P0159
HO2S2 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
6. 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 pos-
sible.)
The voltage should be above 0.68V at least once during
this procedure.
If the voltage is above 0.68V at step 6, step 7 is not nec-
essary.
7. Keep vehicle idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in
SEC774D “D” position with “OD” OFF.
The voltage should be below 0.48V at least once during
this procedure.
8. If NG, replace heated oxygen sensor 2.
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-217
 DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (WITH EURO-OBD)

On Board Diagnosis Logic

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the
theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The
ECM calculates the necessary compensation to correct the offset between the actual and the theoretical
ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the
ECM judges the condition as the fuel injection system malfunction and light up the MI (2 trip detection logic).
Sensor Input Signal to ECM ECM function Actuator
Heated oxygen sensors 1 Density of oxygen in exhaust gas Fuel injection control Fuel injectors
(Mixture ratio feedback signal)

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0171 Fuel injection system too + Fuel injection system does not operate + Intake air leaks
0171 lean properly. + Heated oxygen sensor 1
(Bank 1) + The amount of mixture ratio compensa- + Injectors
tion is too large. + Exhaust gas leaks
(The mixture ratio is too lean.) + Incorrect fuel pressure
P0174
+ Lack of fuel
0174
+ Mass air flow sensor
(Bank 2)
+ Incorrect PCV hose connection

DTC Confirmation Procedure

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
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” 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.
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
stage, if a malfunction exists. If so, go to EC-222, “Diagnos-
tic Procedure”.
7. If it is difficult to start engine at step 6, the fuel injection sys-
tem has a malfunction, too.
8. Crank engine while depressing accelerator pedal. If engine
SEF215Z starts, go to EC-222, “Diagnostic Procedure”. If engine does
not start, check exhaust and intake air leak visually.
EC-218
DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
WITH GST
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
connector.
5. Select “MODE 3” with GST. Make sure DTC P0102 is
detected.
6. Select “MODE 4” with GST and erase the DTC P0102.
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
SEC688C exists. If so, go to EC-222, “Diagnostic Procedure”.
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 EC-222, “Diagnostic Procedure”. If engine does
not start, check exhaust and intake air leak visually.

EC-219
 DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC424M

EC-220
 DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC425M

EC-221
 DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).

SEC502D
OK or NG
OK c GO TO 2.
NG c Repair or replace.

2 CHECK FOR INTAKE AIR LEAK

1. Listen for an intake air leak after the mass air flow sensor.
2. Check PCV hose connection.
OK or NG
OK c GO TO 3.
NG c Repair or replace.

EC-222
 DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK HEATED OXYGEN SENSOR 1 CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect corresponding heated oxygen sensor 1 (HO2S1) harness connector.

SEC671D
3. Disconnect ECM harness connector.
4. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.

MTBL1579
Continuity should exist.

5. Check harness continuity between the following terminals and ground.

Refer to Wiring Diagram.

MTBL1580
Continuity should not exist.

6. Also check harness for short to power.

OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK FUEL PRESSURE

1. Release fuel pressure to zero. Refer to EC-34, “FUEL PRESSURE RELEASE”.
2. Install fuel pressure gauge and check fuel pressure. Refer to EC-34, “FUEL PRESSURE CHECK”.
At idling: 245 kPa (2.45 bar, 2.5 kg/cm2, 36 psi)
OK or NG
OK c GO TO 6.
NG c GO TO 5.

EC-223
 DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 DETECT MALFUNCTIONING PART
Check the following.
+ Fuel pump and circuit (Refer to EC-459, “FUEL PUMP CIRCUIT”.)
+ Fuel pressure regulator (Refer to EC-34, “FUEL PRESSURE CHECK”.)
+ Fuel lines (Refer to MA section.)
+ Fuel filter for clogging
c 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.
3.0 - 9.0 gzm/sec: at idling
10.0 - 25.0 gzm/sec: at 2,500 rpm

With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in MODE 1 with GST.
3.0 - 9.0 gzm/sec: at idling
10.0 - 25.0 gzm/sec: at 2,500 rpm
OK or NG
OK c GO TO 7.
NG c Check connectors for rusted terminals or loose connections in the mass air flow sensor
circuit or engine grounds. Refer to EC-140, “DTC P0102, P0103 MAF SENSOR”.

EC-224
 DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
7 CHECK FUNCTION OF INJECTORS
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.

PBIB0133E
3. Make sure that each circuit produces a momentary engine speed drop.

Without CONSULT-II
1. Start engine.

MEC703B
2. Listen to each injector operating sound.
Clicking noise should be heard.

OK or NG
OK c GO TO 8.
NG c Perform trouble diagnosis for EC-453, “INJECTOR CIRCUIT”.

EC-225
 DTC P0171, P0174 FUEL INJECTION
SYSTEM FUNCTION TB48DE A/T (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 EM section.
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 c GO TO 9.
NG c Replace injectors from which fuel does not spray out. Always replace O-ring with new
ones.

9 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-226
 DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION TB48DE A/T (WITH EURO-OBD)

On Board Diagnosis Logic

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the
theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The
ECM calculates the necessary compensation to correct the offset between the actual and the theoretical
ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too rich.), the
ECM judges the condition as the fuel injection system malfunction and light up the MI (2 trip detection logic).
Sensor Input Signal to ECM ECM function Actuator
Heated oxygen sensors 1 Density of oxygen in exhaust gas Fuel injection control Fuel injectors
(Mixture ratio feedback signal)

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0172 Fuel injection system too + Fuel injection system does not operate + Heated oxygen sensor 1
0172 rich properly. + Injectors
(Bank 1) + The amount of mixture ratio compensa- + Exhaust gas leaks
P0175 tion is too large. + Incorrect fuel pressure
0175 (The mixture ratio is too rich.) + Mass air flow sensor
(Bank 2)

DTC Confirmation Procedure

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
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” 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.
6. Start engine again and let it idle for at least 10 minutes.
The 1st trip DTC P0172, P0175 should be detected at this
stage, if a malfunction exists. If so, go to EC-231, “Diagnos-
tic Procedure”.
7. If it is difficult to start engine at step 6, the fuel injection sys-
tem has a malfunction, too.
8. Crank engine while depressing accelerator pedal.
SEF215Z If engine starts, go to EC-231, “Diagnostic Procedure”. If
engine does not start, remove ignition plugs and check for
fouling, etc.

EC-227
DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
WITH GST
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
connector.
5. Select “MODE 3” with GST. Make sure DTC P0102 is
detected.
6. Select “MODE 4” with GST and erase the DTC P0102.
SEC688C 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 EC-231, “Diagnostic Procedure”.
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 EC-231, “Diagnostic Procedure”. If
engine does not start, check exhaust and intake air leak
visually.

EC-228
 DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC424M

EC-229
 DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC425M

EC-230
 DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).

SEC502D
OK or NG
OK c GO TO 2.
NG c Repair or replace.

2 CHECK FOR INTAKE AIR LEAK

Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK c GO TO 3.
NG c Repair or replace.

EC-231
 DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK HEATED OXYGEN SENSOR 1 CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect corresponding heated oxygen sensor 1 (HO2S1) harness connector.

SEC671D
3. Disconnect ECM harness connector.
4. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.

MTBL1581
Continuity should exist.
5. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

MTBL1582
Continuity should not exist.
6. Also check harness for short to power.
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK FUEL PRESSURE

1. Release fuel pressure to zero. Refer to EC-34, “FUEL PRESSURE RELEASE”.
2. Install fuel pressure gauge and check fuel pressure. Refer to EC-34, “FUEL PRESSURE CHECK”.
At idling: 245 kPa (2.45 bar, 2.5 kg/cm2, 36 psi)
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Fuel pump and circuit (Refer to EC-459, “FUEL PUMP CIRCUIT”.)
+ Fuel pressure regulator (Refer to EC-34, “FUEL PRESSURE CHECK”.)
c Repair or replace.

EC-232
 DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
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.
3.0 - 9.0 gzm/sec: at idling
10.0 - 25.0 gzm/sec: at 2,500 rpm

With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in MODE 1 with GST.
3.0 - 9.0 gzm/sec: at idling
10.0 - 25.0 gzm/sec: at 2,500 rpm
OK or NG
OK c GO TO 7.
NG c Check connectors for rusted terminals or loose connections in the mass air flow sensor
circuit or engine grounds. Refer to EC-140, “DTC P0102, P0103 MAF SENSOR”.

7 CHECK FUNCTION OF INJECTORS

With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.

PBIB0133E
3. Make sure that each circuit produces a momentary engine speed drop.

Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.

MEC703B
Clicking noise should be heard.
OK or NG
OK c GO TO 8.
NG c Perform trouble diagnosis for EC-453, “INJECTOR CIRCUIT”.

EC-233
 DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
8 CHECK INJECTOR
1. Remove injector assembly. Refer to EM section.
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.
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.
5. Prepare pans or saucers under each injectors.
6. Crank engine for about 3 seconds.
Make sure fuel does not drip from injector.
OK or NG
OK (Does not drip.) c GO TO 9.
NG (Drips.) c Replace the injectors from which fuel is dripping. Always replace O-ring with new one.

9 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-234
 DTC P0222, P0223 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
Electric Throttle Control Actuator consists of throttle control
motor, throttle position sensor, etc. The throttle position sensor
responds to the throttle valve movement.
The throttle position sensor has the two sensors. These sensors
are a kind of potentiometers which transform the throttle valve
position into output voltage, and emit the voltage signal to the
ECM. In addition, these sensors detect the opening and closing
speed of the throttle valve and feed the voltage signals to the
ECM. The ECM judges the current opening angle of the throttle
PBIB0145E
valve from these signals and the ECM controls the throttle con-
trol motor to make the throttle valve opening angle properly in
response to driving condition.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
THRTL SEN1 + Ignition switch: ON Accelerator pedal: Fully released More than 0.5V
THRTL SEN2* (Engine stopped)
+ Shift lever: D Accelerator pedal: Fully depressed Less than 1.5V

*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

These self-diagnoses have the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0222 Throttle position sensor 1 An excessively low voltage from the TP + Harness or connectors
0222 circuit low input sensor 1 is sent to ECM. (The TP sensor 1 circuit is open or
shorted.)
P0223 Throttle position sensor 1 An excessively high voltage from the TP + Electric throttle control actuator
0223 circuit high input sensor 1 is sent to ECM. (TP sensor 1)

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operation condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

DTC Confirmation Procedure

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 battery voltage is more than 10V at idle.

EC-235
 DTC P0222, P0223 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-238, “Diagnostic Procedure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-236
DTC P0222, P0223 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC398M

EC-237
 DTC P0222, P0223 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Sensor ground
89 B Approximately 0V
(Throttle position sensor) Warm-up condition
Idle speed

Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully released
98 R/L Throttle position sensor 2
Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal fully depressed

Sensor power supply

103 Y Ignition switch “ON” Approximately 5V
(Throttle position sensor)

Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal fully released
108 L Throttle position sensor 1
Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully depressed

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

SEC690C

c GO TO 2.

EC-238
 DTC P0222, P0223 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect electric throttle control actuator harness connector.

SEC182D
2. Turn ignition switch “ON”.
3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.

PBIB0082E
Voltage: Approximately 5V
OK or NG
OK c GO TO 3.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 5 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 108 and electric throttle control actuator terminal 4.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 5.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

EC-239
 DTC P0222, P0223 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK THROTTLE POSITION SENSOR
Refer to EC-240, “Component Inspection”.
OK or NG
OK c GO TO 7.
NG c GO TO 6.

6 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform EC-31, “Throttle Valve Closed Position Learning”.
3. Turn ignition switch “ON”.
4. Set selector lever to “D” position.

5. Check voltage between ECM terminals 108 (TP sensor 1

signal), 98 (TP sensor 2 signal) and engine ground under the
following conditions.
Terminal Accelerator pedal Voltage
108 Fully released More than 0.36V
(Throttle position sensor
1) Fully depressed Less than 4.75V

98 Fully released Less than 4.75V

(Throttle position sensor
2) Fully depressed More than 0.36V
PBIB0179E

6. If NG, replace electric throttle control actuator and go to the

next step.
7. Perform EC-31, “Accelerator Pedal Released Position Learn-
ing”.
8. Perform EC-31, “Throttle Valve Closed Position Learning”.
9. Perform EC-31, “Idle Air Volume Learning”.

EC-240
 DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6
CYLINDER MISFIRE TB48DE A/T (WITH EURO-OBD)

On Board Diagnosis Logic

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the
crankshaft position (CKP) sensor (OBD) signal to vary, ECM can determine that a misfire is occurring.
Sensor Input Signal to ECM ECM function
Crankshaft position sensor (OBD) Engine speed On board diagnosis of misfire

The misfire detection logic consists of the following two conditions.

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 MI will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor (OBD) signal every 200 engine
revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MI will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MI will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MI will remain on.
If another misfire condition occurs that can damage the TWC, the MI will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MI will only
light when the misfire is detected on a second trip. During this condition, the ECM monitors the CKP
sensor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0300 Multiple cylinder misfire Multiple cylinder misfire. + Improper spark plug
0300 detected + Insufficient compression
P0301 No.1 cylinder misfire + Incorrect fuel pressure
No. 1 cylinder misfires. + The injector circuit is open or shorted
0301 detected
+ Fuel injectors
P0302 No. 2 cylinder misfire + Intake air leak
No. 2 cylinder misfires.
0302 detected + The ignition signal circuit is open or
P0303 No. 3 cylinder misfire shorted
No. 3 cylinder misfires.
0303 detected + Lack of fuel
+ Drive plate or flywheel
P0304 No. 4 cylinder misfire
No. 4 cylinder misfires. + Heated oxygen sensor 1
0304 detected
+ Incorrect PCV hose connection
P0305 No. 5 cylinder misfire
No. 5 cylinder misfires.
0305 detected
P0306 No. 6 cylinder misfire
No. 6 cylinder misfires.
0306 detected

DTC Confirmation Procedure

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.

EC-241
 DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6
CYLINDER MISFIRE TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
WITH CONSULT-II
1. Turn ignition switch “ON”, and select “DATA MONITOR”
mode 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.
PBIB0164E 5. If 1st trip DTC is detected, go to EC-242, “Diagnostic Proce-
dure”.

WITH GST
Follow the procedure “WITH CONSULT-II” above.

Diagnostic Procedure
1 CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK c GO TO 2.
NG c Repair or replace.

2 CHECK FOR EXHAUST SYSTEM CLOGGING

Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK c GO TO 3.
NG c Repair or replace.

EC-242
 DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6
CYLINDER MISFIRE TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 PERFORM POWER BALANCE TEST
With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.

PBIB0133E
2. Is there any cylinder which does not produce a momentary engine speed drop?

Without CONSULT-II
When disconnecting each injector harness connector one at a time, is there any cylinder which does not produce a momentary
engine speed drop?

SEC793C
Yes or No
Yes c GO TO 4.
No c GO TO 7.

4 CHECK INJECTOR
Does each injector make an operating sound at idle?

MEC703B
Yes or No
Yes c GO TO 5.
No c Check injector(s) and circuit(s). Refer to EC-453, “INJECTOR CIRCUIT”.

EC-243
 DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6
CYLINDER MISFIRE TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK IGNITION SPARK
1. Disconnect ignition coil assembly from rocker cover.
2. Connect a known good spark plug to the ignition coil assembly.
3. Place end of spark plug against a suitable ground and crank engine.
4. Check for spark.

SEF575Q
OK or NG
OK c GO TO 6.
NG c Check ignition coil, power transistor and their circuits. Refer to EC-428, “IGNITION SIG-
NAL”.

6 CHECK SPARK PLUGS

Remove the spark plugs and check for fouling, etc.

SEF156I
OK or NG
OK c GO TO 7.
NG c Repair or replace spark plug(s) with standard type one(s). For spark plug type, refer to MA
section.

7 CHECK COMPRESSION PRESSURE

Check compression pressure. Refer to EM section.
Standard: 1,226 kPa (12.26 bar, 12.5 kg/cm2, 178 psi)/200 rpm
Minimum: 1,030 kPa (10.30 bar, 10.5 kg/cm2, 149 psi)/200 rpm
Difference between each cylinder: 98 kPa (0.98 bar, 1.0 kg/cm2, 14 psi)/200 rpm
OK or NG
OK c GO TO 8.
NG c Check pistons, piston rings, valves, valve seats and cylinder head gaskets.

EC-244
 DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6
CYLINDER MISFIRE TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
8 CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. Refer to EC-34, “FUEL PRESSURE RELEASE”.
3. Install fuel pressure gauge and check fuel pressure. Refer to EC-34, “FUEL PRESSURE CHECK”.
At idle: Approx. 245 kPa (2.45 bar, 2.5 kg/cm2, 36 psi)
OK or NG
OK c GO TO 9.
NG c Follow the construction of “FUEL PRESSURE CHECK”.

9 CHECK IGNITION TIMING

Check the following items. Refer to EC-66, “Basic Inspection”.

MTBL1583
OK or NG
OK c GO TO 10.
NG c Follow the “Basic Inspection”.

10 CHECK HEATED OXYGEN SENSOR 1

Refer to EC-170, “Component Inspection”.
OK or NG
OK c GO TO 12.
NG c GO TO 11.

11 CHECK MASS AIR FLOW SENSOR

With CONSULT-II
Check mass air flow sensor signal in “DATA MONITOR” mode with CONSULT-II.
3.0 - 9.0 gzm/sec: at idling
10.0 - 25.0 gzm/sec: at 2,500 rpm

With GST
Check mass air flow sensor signal in MODE 1 with GST.
3.0 - 9.0 gzm/sec: at idling
10.0 - 25.0 gzm/sec: at 2,500 rpm
OK or NG
OK c GO TO 12.
NG c Check connectors for rusted terminals or loose connections in the mass air flow sensor
circuit or engine grounds. Refer to EC-140, “DTC P0102, P0103 MAF SENSOR”.

12 CHECK SYMPTOM MATRIX CHART

Check items on the rough idle symptom in EC-71, “Symptom Matrix Chart”.
OK or NG
OK c GO TO 13.
NG c Repair or replace.

EC-245
 DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6
CYLINDER MISFIRE TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
13 ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. Refer to EC-49, “HOW TO ERASE EMISSION-RELATED
DIAGNOSTIC INFORMATION”.
c GO TO 14.

14 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-246
 DTC P0327, P0328, P0332,
P0333 KS TB48DE A/T (WITH EURO-OBD)

Component Description
The knock sensor is attached to the cylinder block. It senses
engine knocking using a piezoelectric element. A knocking vibra-
tion from the cylinder block is sensed as vibrational pressure.
This pressure is converted into a voltage signal and sent to the
ECM.

SEF598K

On Board Diagnosis Logic

The MI will not light up for these self-diagnoses.
DTC No. Trouble Diagnosis Name DTC Detecting Condition Possible Cause
P0327 Knock sensor circuit low An excessively low voltage from the sen- + Harness or connectors
0327 (bank 1) input sor is sent to ECM. (The sensor circuit is open or shorted.)
P0332 + Knock sensor
0332 (bank 2)
P0328
0328 (bank 1) Knock sensor circuit high An excessively high voltage from the sen-
P0333 input sor is sent to ECM.
0333 (bank 2)

DTC Confirmation Procedure

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
battery voltage is more than 10V at idle.

WITH CONSULT-II
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 1st trip DTC is detected, go to EC-249, “Diagnostic Proce-
dure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-247
DTC P0327, P0328, P0332,
P0333 KS TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC153M

EC-248
 DTC P0327, P0328, P0332,
P0333 KS TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
125 W Knock sensor (bank 1) Approximately 2.5V
Idle speed

Engine is running.
126 W Knock sensor (bank 2) Approximately 2.5V
Idle speed

Diagnostic Procedure
1 CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT-I
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check resistance between ECM terminal 125 (bank 1) or 126 (bank 2) and engine ground. Refer to Wiring Diagram.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 MΩ. Resistance: Approximately 530 - 590 kΩ [at
20°C (68°F)]
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c GO TO 2.

2 CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT-II

1. Disconnect knock sensor harness connector.

SEC889C
2. Check harness continuity between ECM terminal 125 (bank 1) or 126 (bank 2) 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 c GO TO 3.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

EC-249
 DTC P0327, P0328, P0332,
P0333 KS TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK KNOCK SENSOR
Refer to EC-250, “Component Inspection”.
OK or NG
OK c GO TO 5.
NG c Replace knock sensor.

4 RETIGHTEN GROUND SCREWS

Loosen and retighten engine ground screws.

SEC690C

c GO TO 5.

5 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
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.
Resistance: Approximately 530 - 590 kΩ [at 20°C
(68°F)]
CAUTION:
SEF478Y
Do not use any knock sensors that have been dropped or
physically damaged. Use only new ones.

EC-250
 DTC P0335 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)

Component Description
The crankshaft position sensor (OBD) is located on the cylinder
block rear housing facing the gear teeth (cogs) of the signal plate
at the end of the crankshaft. It detects the fluctuation of the
engine revolution.
The sensor consists of a permanent magnet, core and coil.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor change.
The changing gap causes the magnetic field near the sensor to
change.
SEF804Z
Due to the changing magnetic field, the voltage from the sensor
changes.
The ECM receives the voltage signal and detects the fluctuation
of the engine revolution.
This sensor is not used to control the engine system. It is used
only for the on board diagnosis.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
ENG SPEED + Tachometer: Connect Almost the same speed as the
+ Run engine and compare CONSULT-II value with the tachometer indica- tachometer indication.
tion.

On Board Diagnosis Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0335 Crankshaft position sen- + The proper pulse signal from the crank- + Harness or connectors
0335 sor (OBD) circuit shaft position sensor (OBD) is not sent (The sensor circuit is open or shorted.)
to ECM while the engine is running at + Crankshaft position sensor (OBD)
the specified engine speed.

DTC Confirmation Procedure

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
battery voltage is more than 10.5V with ignition switch ON”.

WITH CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR”
mode with CONSULT-II.
2. Start engine and run it for at least 15 seconds at idle speed.
3. If 1st trip DTC is detected, go to EC-254, “Diagnostic Proce-
dure”.

SEF058Y

EC-251
DTC P0335 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-252
DTC P0335 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC344M

EC-253
 DTC P0335 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Crankshaft position sen- Engine is running.

89 B Approximately 0V
sor (OBD) ground Idle speed

Approximately 1 - 2V★

Engine is running.

Warm-up condition.
Idle speed

Crankshaft position sen- SEC748D

111 W
sor (OBD) Approximately 3 - 4V★

Engine is running.

Engine speed is 2,000 rpm

SEC749D

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

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

SEC690C

c GO TO 2.

EC-254
 DTC P0335 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK CKP SENSOR (OBD) POWER SUPPLY CIRCUIT
1. Disconnect crankshaft position (CKP) sensor (OBD) harness connector and ECM harness connector.

SEC732D
2. Check harness continuity between CKP sensor (OBD) terminal 1 and ECM terminal 111.
Continuity should exist.

3. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E201, E70
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Harness for open or short between crankshaft position sensor (OBD) and ECM
c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK CKP SENSOR (OBD) GROUND CIRCUIT FOR OPEN AND SHORT
1. Reconnect ECM harness connector.
2. Check harness continuity between CKP sensor (OBD) terminal 2 and ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for and short to ground and short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E202, E69
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Harness for open or short between crankshaft position sensor (OBD) and ECM
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-255
 DTC P0335 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
6 CHECK SHIELD CIRCUIT
1. Disconnect harness connectors E201, E70.
2. Check harness continuity between harness connector E70 terminal 10 and ground.
Continuity should exist.
3. Also check harness for short to power.
4. Then reconnect harness connectors.
OK or NG
OK c GO TO 8.
NG c GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Joint connector-7
+ Harness for open or short between harness connector E70 and ground
c Repair open circuit or short to power in harness or connectors.

8 CHECK CRANKSHAFT POSITION SENSOR (OBD)

Refer to EC-256, “Component Inspection”.
OK or NG
OK c GO TO 9.
NG c Replace crankshaft position sensor (OBD).

9 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
CRANKSHAFT POSITION SENSOR (OBD)
1. Loosen the fixing bolt of the sensor.
2. Disconnect crankshaft position sensor (OBD) harness con-
nector.
3. Remove the sensor.
4. Visually check the sensor for chipping.

SEF960N

5. Check resistance as shown in the figure.

Resistance: Approximately 512 - 632Ω [at 20°C (68°F)]
6. If NG, replace crankshaft position sensor (OBD).

SEF231W

EC-256
 DTC P0340 CAMSHAFT POSITION
(CMP) SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
The camshaft position sensor (CMPS) is a basic component of
the ECM. It monitors engine speed and piston position. It sends
signals to the ECM to control fuel injection, ignition timing and
other functions.
The camshaft position sensor has a rotor plate and a wave-
forming circuit. The rotor plate has 360 slits for 1° signal and 6
slits for 120° signal. Light Emitting Diodes (LED) and photo
diodes are built into the wave-forming circuit.
When the rotor plate passes between the LED and the photo
SEC695C
diode, the following happens:
Slits in the rotor plate continually cut the transmitted light to the
photo diode from the LED. This generates rough-shaped pulses
converted into on-off pulses by the wave forming circuit sent to
the ECM.

SEF614B

ECM Terminals and Reference Value

Specification data are reference values, and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring voltage. Doing so may result in damage to the
ECM’s transistor. Use a ground other than ECM terminals such as the body ground.
TER-
WIRE DATA
MINAL ITEM CONDITION
COLOR (DC voltage)
NO.
1.0 - 4.0V*1

Engine is running. (Warmed-up condition)

Idle speed

Camshaft position sensor SEC750D

63 B/W
(POS signal) 1.0 - 4.0V*1

Engine is running. (Warmed-up condition)

Engine speed is 2,000 rpm.

SEC751D

EC-257
 DTC P0340 CAMSHAFT POSITION
(CMP) SENSOR TB48DE A/T (WITH EURO-OBD)
ECM Terminals and Reference Value
TER-
(Cont’d)
WIRE DATA
MINAL ITEM CONDITION
COLOR (DC voltage)
NO.
Approximately 0.3 -
0.6V*1

Engine is running. (Warmed-up condition)

Idle speed

83 Camshaft position sensor SEC746D

L
84 (REF signal) Approximately 0.3 -
0.6V*1

Engine is running. (Warmed-up condition)

Engine speed is 2,000 rpm.

SEC747D

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

On Board Diagnosis Logic

Diagnostic
Check Items
Trouble Code Malfunction is detected when ....
(Possible Cause)
No.
P0340 A) Either 1° or 120° signal is not sent to ECM for the + Harness or connectors
0340 first few seconds during engine cranking. (The camshaft position sensor circuit is open or
....................................................................................... shorted.)
+ Camshaft position sensor
B) Either 1° or 120° signal is not sent to ECM during + Starter motor (Refer to EL section.)
engine running. + Starting system circuit (Refer to EL section.)
....................................................................................... + Dead (Weak) battery
C) Either 1° or 120° signal is not in the normal pattern
during engine running.

DTC Confirmation Procedure

Perform “Procedure for malfunction A” first. If DTC cannot
be confirmed, perform “Procedure for malfunction B and C”.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously
conducted, always turn ignition switch “OFF” and wait at
least 5 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that
battery voltage is more than 10.5V at idle.

EC-258
DTC P0340 CAMSHAFT POSITION
(CMP) SENSOR TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
PROCEDURE FOR MALFUNCTION A
With CONSULT-II
1) Turn ignition switch “ON” and select “DATA MONITOR”
mode with CONSULT-II.
2) Crank engine at least 2 seconds.
(If engine does not run, turn ignition switch to “START” for at
least 2 seconds.)
3) If DTC is detected, go to “Diagnostic Procedure”, EC-261.

SEF013Y Without CONSULT-II

1) Crank engine for at least 2 seconds.
(If engine does not run, turn ignition switch to “START” for at
least 2 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 DTC is detected, go to “Diagnostic Procedure”, EC-261.

PROCEDURE FOR MALFUNCTION B AND C

With CONSULT-II
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 DTC is detected, go to “DIAGNOSTIC PROCEDURE”,
EC-261.

Without CONSULT-II
1) Start engine and run it for at least 2 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-261.

EC-259
DTC P0340 CAMSHAFT POSITION
(CMP) SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC145M

EC-260
DTC P0340 CAMSHAFT POSITION
(CMP) SENSOR TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
INSPECTION START

.
CHECK STARTING SYSTEM. No Check starting system.
c
Does the engine turn over? (Refer to EL section.)
(Does the starter motor operate?)
Yes
.
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground
SEC690C screws.
OK

.
CHECK POWER SUPPLY. NG Check the following.
c
1. Disconnect camshaft position sensor + Harness connectors
harness connector. M52 , F7
2. Turn ignition switch “ON”. + Harness for open or
3. Check voltage between terminal V3 and short between camshaft
ground with CONSULT-II or tester. position sensor and ECM
Voltage: Battery voltage + Harness for open or
short between camshaft
OK position sensor and ECM
relay
SEC696C
If NG, repair harness or
connectors.
.
CHECK GROUND CIRCUIT. NG Repair open circuit, short to
c
1. Turn ignition switch “OFF”. power in harness or con-
2. Check harness continuity between ter- nectors.
minal V4 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
If OK, check harness for short to power.
OK

.
SEC697C
CHECK INPUT SIGNAL CIRCUIT. NG Repair open circuit, short to
c
1. Disconnect ECM harness connector. ground or short to power in
2. Check harness continuity between harness or connectors.
CMPS terminals V1 ,V 2 and ECM ter-
minals.

CMPS ECM ter-

Continuity
terminal minal

120° sig-
nal
1
V 83 , V
V 84 Yes
(REF sig-
nal)

1° signal
(POS sig- 2
V 63
V Yes
nal)

Refer to Wiring Diagram.

If OK, check harness for short to ground
and short to power.
OK
.
A
V

EC-261
DTC P0340 CAMSHAFT POSITION
(CMP) SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
A
V
.
CHECK COMPONENT. NG Replace camshaft position
c
(Camshaft position sensor). sensor.
Refer to “COMPONENT INSPECTION”,
EC-262.
OK
.
CHECK INTERMITTENT INCIDENT.
Refer to “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-112.

.
INSPECTION END

Component Inspection
CAMSHAFT POSITION SENSOR
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Check voltage between the following ECM terminals and
ground with DC range.
ECM terminal Reference illustration
1° signal 63
V A
V
SEC827C (POS signal)
120° signal 83 , V
V 84 B
V
(REF signal)

CAUTION:
Do not use ECM ground terminals when measuring voltage.
Doing so may result in damage to the ECM’s transistor. Use
a ground other than ECM terminals such as the body
ground.

EC-262
 DTC P0340 CAMSHAFT POSITION
(CMP) SENSOR TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
TER-
WIRE DATA
MINAL ITEM CONDITION
COLOR (DC voltage)
NO.
1.0 - 4.0V*1

Engine is running. (Warmed-up condition)

Idle speed

Camshaft position sensor SEC750D

63 B/W
(POS signal) 1.0 - 4.0V*1

Engine is running. (Warmed-up condition)

Engine speed is 2,000 rpm.

SEC751D

Approximately 0.3 -
0.6V*1

Engine is running. (Warmed-up condition)

Idle speed

83 Camshaft position sensor SEC746D

L
84 (REF signal) Approximately 0.3 -
0.6V*1

Engine is running. (Warmed-up condition)

Engine speed is 2,000 rpm.

SEC747D

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

If NG, replace camshaft position sensor.

EC-263
 DTC P0420, P0430 THREE WAY CATALYST
FUNCTION TB48DE A/T (WITH EURO-OBD)

On Board Diagnosis Logic

The ECM monitors the switching frequency ratio of heated oxy-
gen sensors 1 and 2.
A three way catalyst (manifold) with high oxygen storage capac-
ity will indicate a low switching frequency of heated oxygen sen-
sor 2. As oxygen storage capacity decreases, the heated oxygen
sensor 2 switching frequency will increase.
When the frequency ratio of heated oxygen sensors 1 and 2
approaches a specified limit value, the three way catalyst (mani-
fold) malfunction is diagnosed.
SEF484YF

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420 Catalyst system efficiency + Three way catalyst (manifold) does not + Three way catalyst (manifold)
0420 below threshold operate properly. + Exhaust tube
(Bank 1) + Three way catalyst (manifold) does not + Intake air leaks
have enough oxygen storage capacity. + Fuel injectors
P0430 + Fuel injector leaks
0430 + Spark plug
(Bank 2) + Improper ignition timing

DTC Confirmation Procedure

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
TESTING CONDITION:
+ Open engine hood before conducting the following pro-
cedure.
+ Do not hold engine speed for more than the specified
minutes below.
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.

5. Select “DTC & SRT CONFIRMATION” then “SRT WORK

SUPPORT” mode with CONSULT-II.
6. Rev engine up to 2,500 to 3,500 rpm and hold it for 3 con-
secutive minutes then release the accelerator pedal com-
pletely.
If “INCMP” of “CATALYST” changed to “COMPLT”, go to
step 9
7. Wait 5 seconds at idle.

PBIB0566E

EC-264
DTC P0420, P0430 THREE WAY CATALYST
FUNCTION TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
8. Rev engine up to 2,000 to 3,000 rpm and maintain it until
“INCMP” of “CATALYST” changes to “CMPLT” (It will take
approximately 5 minutes).
If not “CMPLT”, stop engine and cool it down to less than
70°C (158°F) and then retest from step 1.
a. Turn ignition switch “OFF” and leave the vehicle in a cool
place (soak the vehicle).

PBIB0567E

b. Turn ignition switch “ON” and select “COOLANTEMP/S” in

“DATA MONITOR” mode with CONSULT-II.
c. Start engine and warm it up while monitoring
“COOLANTEMP/S” indication on CONSULT-II.
d. When “COOLANTEMP/S” indication reaches to 70°C
(158°F), go to step 3.

SEF013Y

9. Select “SELF-DIAG RESULTS” mode with CONSULT-II.

10. Confirm that the 1st trip DTC is not detected.
If the 1st trip DTC is detected, go to EC-266, “Diagnostic
Procedure”.

SEF535Z

Overall Function Check

Use this procedure to check the overall function of the three way
catalyst (Manifold). During this check, a DTC might not be con-
firmed.
CAUTION:
Always drive vehicle at a safe speed.

WITH GST
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.

EC-265
 DTC P0420, P0430 THREE WAY CATALYST
FUNCTION TB48DE A/T (WITH EURO-OBD)
Overall Function Check (Cont’d)
5. Set voltmeters probes between ECM terminals 115 [HO2S1
(B 1) signal], 114 [HO2S1 (B 2) signal] and engine ground,
and ECM terminals 124 [HO2S2 (B 1) signal], 123 [HO2S2
(B 2) signal] and engine ground.
6. Keep engine speed at 2,000 rpm constant under no load.

SEC184DA

7. Make sure that the voltage switching frequency (high & low)
between ECM terminals 124 and engine ground, or 123 and
engine ground is very less than that of ECM terminals 115
and engine ground, or 114 and engine ground.
Switching frequency ratio = A/B
A: Heated oxygen sensor 2 voltage switching frequency
B: Heated oxygen sensor 1 voltage switching frequency
This ratio should be less than 0.75.
If the ratio is greater than above, it means three way cata-
lyst does not operate properly. Go to EC-266, “Diagnostic
SEC672D Procedure”.
NOTE:
If the voltage at terminal 35 or 36 does not switch periodi-
cally more than 5 times within 10 seconds at step 7, perform
trouble diagnosis for “DTC P0133, P0153” first. (See
EC-172.)

Diagnostic Procedure
1 CHECK EXHAUST SYSTEM
Visually check exhaust tubes and muffler for dent.
OK or NG
OK c GO TO 2.
NG c Repair or replace.

2 CHECK EXHAUST GAS LEAK

1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before the three way catalyst (manifold).

SEC502D
OK or NG
OK c GO TO 3.
NG c Repair or replace.

EC-266
 DTC P0420, P0430 THREE WAY CATALYST
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK c GO TO 4.
NG c Repair or replace.

4 CHECK IGNITION TIMING

Check the following items. Refer to EC-66, “Basic Inspection”.

MTBL1584
OK or NG
OK c GO TO 5.
NG c Follow the EC-66, “Basic Inspection”.

5 CHECK INJECTORS
1. Stop engine and then turn ignition switch “ON”.
2. Check voltage between ECM terminals 5, 6, 7, 13, 14, 15 and ground with CONSULT-II or tester.

SEC743D
Battery voltage should exist.
3. Refer to Wiring Diagram for Injectors, EC-454.
OK or NG
OK c GO TO 6.
NG c Perform EC-455, “Diagnostic Procedure”.

EC-267
 DTC P0420, P0430 THREE WAY CATALYST
FUNCTION TB48DE A/T (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 c GO TO 7.
NG c Check ignition coil with power transistor and their circuit. Refer to EC-428, “IGNITION SIG-
NAL”.

7 CHECK INJECTOR
1. Turn ignition switch “OFF”.
2. Remove injector assembly.
Refer to EM section.
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.) c GO TO 8.
NG (Drips.) c Replace the injector(s) from which fuel is dripping.

8 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
Trouble is fixed. c INSPECTION END
Trouble is not fixed. c Replace three way catalyst (Manifold).

EC-268
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)

Description
SYSTEM DESCRIPTION
Sensor Input Signal to ECM ECM Function Actuator
Camshaft position sensor Engine speed EVAP canister purge EVAP canister purge vol-
Mass air flow sensor Amount of intake air flow control ume control solenoid
valve
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Throttle position sensor Throttle position
Accelerator pedal position sensor Closed throttle position
Density of oxygen in exhaust gas
Heated oxygen sensors 1
(Mixture ratio feedback signal)
Vehicle speed sensor Vehicle speed

*: This signal is sent to the ECM through CAN communication line.

This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-
sage in the EVAP canister 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 considering 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
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
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
PURG VOL C/V + Engine: After warming up Idle 0%
+ Shift lever: N
+ Air conditioner switch: OFF 2,000 rpm 65 - 85%
+ No-load

On Board Diagnosis Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0444 EVAP canister purge vol- An excessively low voltage signal + Harness or connectors
0444 ume control solenoid is sent to ECM through the valve (The solenoid valve circuit is open or shorted.)
valve circuit open + EVAP canister purge volume control solenoid
valve
+ Harness or connectors
EVAP canister purge vol-
P0445 An excessively high voltage signal (The solenoid valve circuit is shorted.)
ume control solenoid
0445 is sent to ECM through the valve + EVAP canister purge volume control solenoid
valve circuit shorted
valve

EC-269
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for at least 30 seconds.
4. If 1st trip DTC is detected, go to EC-273, “Diagnostic Proce-
dure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-270
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC418M

EC-271
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

BATTERY VOLTAGE
(11 - 14V)

Engine is running.

Idle speed

EVAP canister purge vol-

54 W/B ume control solenoid PBIB0050E

valve Approximately 10V★

Engine is running.

Engine speed is about 2,000 rpm (More than

100 seconds after starting engine)

PBIB0520E

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

EC-272
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
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.

SEC785C
3. Turn ignition switch “ON”.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 1 and ground with CONSULT-II or tester.

SEC815C
Voltage: Battery voltage
OK or NG
OK c GO TO 3.
NG c GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
+ 10A fuse
+ Fuse block (J/B) connector M2
+ Harness connectors M52, F7
+ Harness for open or short between EVAP canister purge volume control solenoid valve and fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-273
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE TB48DE A/T (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”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 54 and EVAP canister purge volume control solenoid valve 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 (With CONSULT-II) c GO TO 4.
OK (Without CONSULT-II) c GO TO 5.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT-II
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that engine speed varies according to the
valve opening.

PBIB0147E
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to EC-275, “Component Inspection”.
OK or NG
OK c GO TO 6.
NG c Replace EVAP canister purge volume control solenoid valve.

6 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-274
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)

Component Inspection
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.
Condition Air passage continuity between A and
(PURG VOL CONT/V value) B
PBIB0149E 100.0% Yes
0.0% No

Without CONSULT-II
Check air passage continuity of EVAP canister purge volume
control solenoid valve under the following conditions.
Air passage continuity between A and
Condition
B
12V direct current supply between
Yes
terminals 1 and 2
No supply No

PBIB0150E

EC-275
 DTC P0500 VSS TB48DE A/T (WITH EURO-OBD)

Description
NOTE:
If DTC P0500 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer
to EC-121, “DTC U1000 CAN COMMUNICATION LINE”.
The vehicle speed sensor is installed in the transaxle. It contains a pulse generator which provides a vehicle
speed signal to the combination meter. The combination meter then sends a signal to the ECM through CAN
communication line.
On Board Diagnosis Logic
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0500 Vehicle speed sensor The almost 0 km/h (0 MPH) + Harness or connectors
0500 signal from vehicle speed (The CAN communication line is open or shorted.)
sensor is sent to ECM even + Harness or connectors
when vehicle is being driven. (The vehicle speed signal circuit is open or shorted.)
+ Combination meter
+ Vehicle speed signal

DTC Confirmation Procedure

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:
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 to be easier, it is unnecessary to lift the vehicle.

WITH CONSULT-II
1. Start engine.
2. Read “VHCL SPEED SE” in “DATA MONITOR” mode with
CONSULT-II. The vehicle speed on CONSULT-II should
exceed 10 km/h (6 MPH) when rotating wheels with suitable
gear position.
If NG, go to EC-277, “Diagnostic Procedure”.
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Warm engine up to normal operating temperature.

5. Maintain the following conditions for at least 60 consecutive

seconds.
ENG SPEED More than 1,350 rpm
COOLAN TEMP/S More than 70°C (158°F)
B/FUEL SCHDL More than 6.5 msec
Selector lever Suitable position
PW/ST SIGNAL OFF

6. If 1st trip DTC is detected, go to EC-277, “Diagnostic Proce-

SEF196Y dure”.

EC-276
 DTC P0500 VSS TB48DE A/T (WITH EURO-OBD)

Overall Function Check

Use this procedure to check the overall function of the vehicle
speed signal circuit. During this check, a 1st trip DTC might not
be confirmed.

WITH GST
1. Lift up drive wheels.
2. Start engine.
3. Read vehicle speed signal in “MODE 1” with GST.
The vehicle speed signal on GST should be able to exceed
10 km/h (6 MPH) when rotating wheels with suitable gear
position.
4. If NG, go to EC-277, “Diagnostic Procedure”.

Diagnostic Procedure
1 CHECK VEHICLE SPEED SENSOR CIRCUIT
Refer to EL section.
OK or NG
OK c GO TO 2.
NG c Repair or replace.

2 CHECK COMBINATION METER

Check combination meter function.
Refer to EL section.
c INSPECTION END

EC-277
 DTC P0550 PSP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
Power steering pressure (PSP) sensor is installed to the power
steering high-pressure tube and detects a power steering load.
This sensor is a potentiometer which transforms the power steer-
ing load into output voltage, and emits the voltage signal to the
ECM. The ECM controls the electric throttle control actuator and
adjusts the throttle valve opening angle to increase the engine
speed and adjusts the idle speed for the increased load.

SEC735D

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
PW/ST SIGNAL + Engine: After warming up, idle Steering wheel is in neutral position. OFF
the engine (Forward direction)
Steering wheel is turned. ON

On Board Diagnosis Logic

The MI will not light up for this diagnosis.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0550 Power steering pressure An excessively low or high voltage from + Harness or connectors
0550 sensor circuit the sensor is sent to ECM. (The sensor circuit is open or shorted.)
+ Power steering pressure sensor

DTC Confirmation Procedure

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
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for at least 5 seconds.
4. If 1st trip DTC is detected, go to EC-280, “Diagnostic Proce-
dure”.

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-278
DTC P0550 PSP
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC342M

EC-279
 DTC P0550 PSP
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Sensor ground Engine is running.

89 B (Power steering pressure Approximately 0V
sensor) Idle speed

Sensor power supply

103 Y (Power steering pressure Ignition switch “ON” Approximately 5V
sensor)

Engine is running.
0.5 - 4.0V
Power steering pressure Steering wheel is being turned.
118 BR/W
sensor Engine is running.
0.4 - 0.8V
Steering wheel is not being turned.

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

SEC690C

c GO TO 2.

EC-280
 DTC P0550 PSP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect PSP sensor harness connector.

SEC735D
2. Turn ignition switch “ON”.
3. Check voltage between PSP sensor terminal 1 and ground with CONSULT-II or tester.

PBIB0085E
Voltage: Approximately 5V
OK or NG
OK c GO TO 3.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between PSP sensor terminal 3 and ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 118 and PSP sensor terminal 2.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 5.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

EC-281
 DTC P0550 PSP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK PSP SENSOR
Refer to EC-282, “Component Inspection”.
OK or NG
OK c GO TO 6.
NG c Replace PSP sensor.

6 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 118 and ground under
the following conditions.
Condition Voltage
Steering wheel is being turned fully. 0.5 - 4.0V
SEC736D Steering wheel is not being turned. 0.4 - 0.8V

EC-282
 DTC P0605 ECM TB48DE A/T (WITH EURO-OBD)

Component Description
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the
engine.

SEF093X

On Board Diagnosis Logic

This self-diagnosis has one or two trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0605 Engine control module A) ECM calculation function is malfunc- + ECM
0605 tioning.
B) ECM EEP-ROM system is malfunc-
tioning.
C) ECM self shut-off function is malfunc-
tioning.

FAIL-SAFE MODE
ECM enters fail-safe mode when malfunction A is detected.
Detected items Engine operation condition in fail-safe mode
Malfunction A ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening
(approx. 5 degrees) by the return spring.

DTC Confirmation Procedure

Perform “PROCEDURE FOR MALFUNCTION A” first. If the DTC cannot be confirmed, perform “PRO-
CEDURE FOR MALFUNCTION B”. If there is no malfunction on “PROCEDURE FOR MALFUNCTION
B”, perform “PROCEDURE FOR MALFUNCTION 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
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If 1st DTC is detected, go to EC-285, “Diagnostic Procedure”.

SEF058Y

With GST
Follow the procedure “With CONSULT-II” above.

EC-283
 DTC P0605 ECM TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
PROCEDURE FOR MALFUNCTION B
With CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch “OFF”, wait at least 10 seconds, and then
turn “ON”.
4. If 1st trip DTC is detected, go to EC-285, “Diagnostic Proce-
dure”.

SEF058Y

With GST
Follow the procedure “With CONSULT-II” above.

PROCEDURE FOR MALFUNCTION C

With CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch “OFF”, wait at least 10 seconds, and then
turn “ON”.
4. Repeat step 3 for 32 times.
5. If 1st trip DTC is detected, go to EC-285, “Diagnostic Proce-
dure”.
SEF058Y

With GST
Follow the procedure “With CONSULT-II” above.

EC-284
 DTC P0605 ECM TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
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-283.
5. Is the 1st trip DTC P0605 displayed again?

With GST
1. Turn ignition switch “ON”.
2. Select MODE 4 with GST.
3. Touch “ERASE”.
4. Perform “DTC Confirmation Procedure”.
See EC-283.
5. Is the 1st trip DTC P0605 displayed again?
Yes or No
Yes c GO TO 2.
No c INSPECTION END

2 REPLACE ECM
1. Replace ECM.
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to EC-50, “NATS (Nissan Anti-theft
System)”.
3. Perform EC-31, “Accelerator Pedal Released Position Learning”.
4. Perform EC-31, “Throttle Valve Closed Position Learning”.
5. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

EC-285
 DTC P0650 MI TB48DE A/T (WITH EURO-OBD)

Component Description
Malfunction Indicator (MI) is located on the instrument panel. When the ignition switch is turned ON without
engine running, MI will light up. This is a bulb check. When the engine is started, MI should go off. If MI
remains on, the on board diagnostic system has detected an engine system malfunction.

On Board Diagnosis Logic

The MI will not light up for this self-diagnosis.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0650 Malfunction indicator (MI) + An excessively high voltage is sent to + Harness or connectors
0650 control circuit ECM through the MI circuit under the (MI circuit is open or shorted.)
condition that calls for MI light up. + MI
+ An excessively low voltage is sent to
ECM through the MI circuit under the
condition that calls for MI not to light up.

FAIL-SAFE MODE
ECM enters fail-safe mode when both DTC P0650 and another DTC, which calls for MI to light up, are
detected at the same time.
Detected items Engine operating condition in fail-safe mode
MI circuit Engine speed will not rise more than 2,500 rpm due to the fuel cut.

DTC Confirmation Procedure

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
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-288.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-286
DTC P0650 MI TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC422M

EC-287
 DTC P0650 MI TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and body 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Ignition switch “ON” 0 - 1.0V

35 Y/G MI Engine is running. BATTERY VOLTAGE

Idle speed (11 - 14V)

Diagnostic Procedure
1 CHECK MIL POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect combination meter harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between combination meter terminal 46 and ground with CONSULT-II or tester.

SEC737D
Voltage: Battery voltage
OK or NG
OK c GO TO 3.
NG c GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
+ Fuse block (J/B) connector M3
+ 10A fuse
+ Harness for open or short between fuse block (J/B) and combination meter
c Repair harness or connectors.

3 CHECK MIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 35 and combination meter 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 c GO TO 5.
NG c GO TO 4.

EC-288
 DTC P0650 MI TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 DETECT MALFUNCTIONING PART
Check the following.
+ Harness connectors M52, F7
+ Harness for open or short between ECM and combination meter
c Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK COMBINATION METER

Check continuity between combination meter terminals 46 and 3 under the following conditions.

SEC777D

MTBL1599
OK or NG
OK c GO TO 6.
NG c Replace combination meter.

6 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-112.
OK or NG
OK c Replace combination meter. Refer to EL section.
NG c Repair or replace.

EC-289
 DTC P1065 ECM POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)

Component Description
Battery voltage is supplied to the ECM even when the ignition
switch is turned OFF for the ECM memory function of the DTC
memory, the air fuel ratio feedback compensation value memory,
the idle air volume learning value memory, etc.

SEF093X

On Board Diagnosis Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1065 ECM power supply circuit ECM back up RAM system does not func- + Harness or connectors
1065 tion properly. [ECM power supply (back-up) circuit is
open or shorted.]
+ ECM

DTC Confirmation Procedure

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
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. Turn ignition switch “OFF”, wait at least 10 seconds, and then
turn “ON”.
5. Repeat steps 3 and 4 four times.
6. If 1st trip DTC is detected, go to EC-292, “Diagnostic Proce-
dure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-290
DTC P1065 ECM POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC244M

EC-291
 DTC P1065 ECM POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Power supply for ECM BATTERY VOLTAGE

95 W Ignition switch “ON”
(Buck-up) (11 - 14V)

Diagnostic Procedure
1 CHECK ECM POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check voltage between ECM terminal 95 and ground with CONSULT-II or tester.

PBIB0087E
Voltage: Battery voltage
OK or NG
OK c GO TO 3.
NG c GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness connectors M52, F7
+ 10A fuse
+ Harness for open or short between ECM and battery
c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

EC-292
 DTC P1065 ECM POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 PERFORM DTC CONFIRMATION PROCEDURE
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-290.
5. Is the 1st trip DTC P1065 displayed again?

With GST
1. Turn ignition switch “ON”.
2. Select MODE 4 with GST.
3. Touch “ERASE”.
4. Perform “DTC Confirmation Procedure”.
See EC-290.
5. Is the 1st trip DTC P1065 displayed again?
Yes or No
Yes c GO TO 5.
No c INSPECTION END

5 REPLACE ECM
1. Replace ECM.
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to EC-50, “NATS (Nissan Anti-theft
System)”.
3. Perform EC-31, “Accelerator Pedal Released Position Learning”.
4. Perform EC-31, “Throttle Valve Closed Position Learning”.
5. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

EC-293
 DTC P1111 IVT CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)

Description
SYSTEM DESCRIPTION
Sensor Input Signal to ECM ECM Function Actuator
Camshaft position sensor Engine speed Intake valve tim- Intake valve timing con-
Engine coolant temperature sensor Engine coolant temperature ing control trol solenoid valve

Vehicle speed sensor Vehicle speed

The intake valve timing control system is utilized to When ECM sends ON signal to intake valve timing
control intake valve opening and closing timing. control solenoid valve, oil pressure is transmitted to
Engine coolant temperature signals, engine speed, camshaft sprocket. Then, intake side camshaft is
amount of intake air, vehicle speed and throttle advanced.
position are used to determine intake valve timing.
The intake camshaft sprocket position is regulated
by oil pressure controlled by the intake valve tim-
ing control.

SEC776D

Operation
Intake valve timing con- Intake valve opening
Engine operating condition Valve overlap Engine valve timing
trol solenoid valve and closing time
+ Engine coolant temperature is
between 70°C (158°F) to 119°C
(246°F) and engine speed is
between 1,000 rpm and 4,200 rpm. ON Advance Increased II
V
+ During high load condition
+ Vehicle speed is more than 8 km/h
(5 MPH).

Those other than above OFF Normal Normal VI

EC-294
 DTC P1111 IVT CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

+ Engine: Idle OFF

+ Engine: After warning up

INT/V SOL-B1 + Engine speed is between 1,000 rpm and 4,200 rpm
ON
+ Vehicle speed is more than 8 km/h (5 MPH).
+ During high load condition

On Board Diagnosis Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1111 Intake valve timing con- An improper voltage is sent to the ECM + Harness or connectors
1111 trol solenoid valve circuit through intake valve timing control sole- (Solenoid valve circuit is open or
noid valve. shorted.)
+ Intake valve timing control solenoid
valve

DTC Confirmation Procedure

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
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 5 seconds.
4. If 1st trip DTC is detected, go to EC-297, “Diagnostic Proce-
dure”.

SEF058Y

WITH GST
Following the procedure “WITH CONSULT-II” above.

EC-295
DTC P1111 IVT CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC419M

EC-296
 DTC P1111 IVT CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Intake valve timing control solenoid is operat- Approximately 0V

Intake valve timing control ing.

152 R
solenoid valve Engine is running.
BATTERY VOLTAGE
Intake valve timing control solenoid is not (11 - 14V)
operating.

★: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
1 CHECK IVT CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect intake valve timing control solenoid valve harness connector.

SEC793C
3. Turn ignition switch “ON”.
4. Check voltage between intake valve timing control solenoid valve terminal 2 and ground with CONSULT-II or tester.

SEC794C
Voltage: Battery voltage
OK or NG
OK c GO TO 3.
NG c GO TO 2.

EC-297
 DTC P1111 IVT CONTROL SOLENOID
VALVE TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 DETECT MALFUNCTION PART
Check the following.
+ Harness connectors M52, F7
+ 10A fuse
+ Fuse block (J/B) connector M2
+ Harness for open or short between intake valve timing control solenoid valve and fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK IVT 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 152 and intake valve timing 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 c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to EC-298, “Component Inspection”.
OK or NG
OK c GO TO 5.
NG c Replace intake valve timing control solenoid valve.

5 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT.
c INSPECTION END

Component Inspection
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
1. Check oil passage visually for any metal debris.
2. Supply intake valve timing control solenoid valve terminals
with battery voltage.
3. Make sure that inside plunger protrudes.
If NG, replace intake valve timing control solenoid valve.

SEC795C

EC-298
 DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR TB48DE A/T (WITH EURO-OBD)

Component Description
Electric Throttle Control Actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and the opening and closing speed of the
throttle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the
throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.

On Board Diagnosis Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1121 Electric throttle control A) Electric throttle control actuator does not function + Electric throttle control
1121 actuator properly due to the return spring malfunction. actuator
B) Throttle valve opening angle in fail-safe mode is not
in specified range.
C) ECM detect the throttle valve is stuck open.
This self-diagnosis has the one trip detection
logic.

FAIL-SAFE MODE
When the malfunction A or B is detected in the two consecutive trips, the ECM enters fail-safe mode and
the MI lights up.
When the malfunction C is detected even in the 1st trip, the ECM enters fail-safe mode and the MI lights
up.
Detected items Engine operating condition in fail-safe mode
Malfunction A The ECM controls the electric throttle actuator by regulating the throttle opening around the idle position.
The engine speed will not rise more than 2,000 rpm.
Malfunction B ECM controls the electric throttle control actuator by regulating the throttle opening to 20 degrees or less.
Malfunction C While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the engine stalls.
The engine can restart in “N” or “P” position, and engine speed will not exceed 1,000 rpm or more.

DTC Confirmation Procedure

NOTE:
+ Perform “PROCEDURE FOR MALFUNCTION A AND B”
first. If the 1st trip DTC cannot be confirmed, perform
“PROCEDURE FOR MALFUNCTION C”.
If there is no malfunction on “PROCEDURE FOR MAL-
FUNCTION A AND B”, perform “PROCEDURE FOR MAL-
FUNCTION C”.
+ 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 AND B
With CONSULT-II
1. Turn ignition witch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Shift selector lever to “D” position and wait at least 2 sec-
onds.
4. Turn ignition switch “OFF”, wait at least 10 seconds, and then
turn “ON”.
5. If 1st trip DTC is detected, go to EC-300, “Diagnostic Proce-
SEF058Y
dure”.

EC-299
 DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
With GST
Follow the procedure “With CONSULT-II” above.

PROCEDURE FOR MALFUNCTION C

With CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Shift selector lever to “D” position and wait at least 2 sec-
onds.
4. Shift selector lever to “N” or “P” position.
5. Start engine and let it idle for 3 seconds.
6. If DTC is detected, go to EC-300, “Diagnostic Procedure”.
SEF058Y

With GST
Follow the procedure “With CONSULT-II” above.

Diagnostic Procedure
1 CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
2. Perform 31, “Accelerator Pedal Released Position Learning”.
3. Check if a foreign matter is caught between the throttle valve and the housing.

SEC183D
OK or NG
OK c GO TO 2.
NG c Remove the foreign matter and clean the electric throttle control actuator inside.

2 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

EC-300
 DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION TB48DE A/T (WITH EURO-OBD)

Description
NOTE:
If DTC P1122 is displayed with DTC P1121 or 1126, first perform the trouble diagnosis for DTC P1121
or P1126. Refer to EC-299 or EC-309.
Electric Throttle Control Actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides
feedback to the ECM to control the throttle control motor to make the throttle valve opening angle properly
in response to driving condition.

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1122 Electric throttle control Electric throttle control function does not + Harness or connectors
1122 performance problem operate properly. (Throttle control motor circuit is open or
shorted.)
+ Harness or connectors
(Throttle control motor relay circuit is
open or shorted.)
+ Electric throttle control actuator
+ Throttle control motor relay

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operating condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the
return spring.

DTC Confirmation Procedure

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
1. Turn ignition switch “ON” and wait at least 2 seconds.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 5 seconds.
SEF058Y
4. If DTC is detected, go to EC-303, “Diagnostic Procedure”.

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-301
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC404M

EC-302
 DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

BATTERY VOLTAGE
Throttle control motor Ignition switch “OFF”
26 P/L (11 - 14V)
relay
Ignition switch “ON” 0 - 1.0V

0 - 14V★

Ignition switch “ON”

Throttle control motor
151 L/W Engine stopped
(Open) Shift lever position is “D”
Accelerator pedal is depressed

PBIB0534E

Throttle control motor

153 B Engine is running. Approximately 0V
ground

0 - 14V★

Ignition switch “ON”

Throttle control motor
154 L/B Engine stopped
(Close) Shift lever position is “D”
Accelerator pedal is released

PBIB0533E

Throttle control motor BATTERY VOLTAGE

157 G Ignition switch “ON”
power supply (11 - 14V)

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

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

SEC690C

c GO TO 2.

EC-303
 DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK THROTTLE CONTROL MOTOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 153 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK c GO TO 3.
NG c Repair open circuit or short to power in harness or connectors.

3 CHECK THROTTLE CONTROL MOTOR RELAY SIGNAL CIRCUIT

1. Reconnect harness connectors disconnected.
2. Check voltage between ECM terminal 157 and ground under the following conditions with CONSULT-II or tester.

SEC740D

MTBL1585
OK or NG
OK c GO TO 11.
NG c GO TO 4.

EC-304
 DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect throttle control motor relay.

SEC185D
3. Check voltage between throttle control motor relay terminals 2, 3 and ground.

PBIB0097E
Voltage: Battery voltage
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ 15A fuse
+ Harness for open or short between throttle control motor relay and fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 157 and throttle control motor relay terminal 5.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 8.
NG c GO TO 7.

EC-305
 DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
7 DETECT MALFUNCTIONING PART
Check the following.
+ Harness connectors E127, M21
+ Harness connectors M55, F35
+ Harness for open or short between ECM and throttle control motor relay
c Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT

1. Check continuity between ECM terminal 26 and throttle control motor relay terminal 1.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 10.
NG c GO TO 9.

9 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness connectors M55, F35
+ Harness for open or short between ECM and throttle control motor relay
c Repair open circuit or short to ground or short to power in harness or connectors.

10 CHECK THROTTLE CONTROL MOTOR RELAY

Refer to EC-308, “Component Inspection”.
OK or NG
OK c GO TO 14.
NG c Replace throttle control motor relay.

EC-306
 DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
11 CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch “OFF”.
2. Disconnect electric throttle control actuator harness connector.

SEC182D
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals.
Refer to Wiring Diagram.

MTBL1586
5. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 12.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

12 CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve and the housing.

SEC183D
OK or NG
OK c GO TO 13.
NG c Remove the foreign matter and clean the electric throttle control actuator inside.

EC-307
 DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
13 CHECK THROTTLE CONTROL MOTOR
Refer to EC-308, “Component Inspection”.
OK or NG
OK c GO TO 14.
NG c GO TO 15.

14 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT.
OK or NG
OK c GO TO 15.
NG c Repair or replace harness or connectors.

15 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

Component Inspection
THROTTLE CONTROL MOTOR RELAY
1. Apply 12V direct current between relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5.
Conditions Continuity
12V direct current supply between
Yes
terminals 1 and 2
No current supply No
PBIB0098E
3. If NG, replace throttle control motor relay.

THROTTLE CONTROL MOTOR

1. Disconnect electric throttle control actuator harness connec-
tor.
2. Check resistance between terminals 3 and 6.
Resistance: Approximately 1 - 15 Ω [at 25°C (77°F)]
3. If NG, replace electric throttle control actuator and go to next
step.
4. Perform EC-31, “Accelerator Pedal Released Position Learn-
ing”.
5. Perform EC-31, “Throttle Valve Closed Position Learning”.
PBIB0095E 6. Perform EC-31, “Idle Air Volume Learning”.

EC-308
 DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY TB48DE A/T (WITH EURO-OBD)

Component Description
Power supply for the Throttle Control motor is provided to the ECM via throttle control motor relay. The
throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the
ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When
the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery
voltage is not provided to the ECM.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
THRTL RELAY + Ignition switch: ON ON

On Board Diagnosis Logic

These self-diagnoses have the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1124 Throttle control motor ECM detect the throttle control motor relay + Harness or connectors
1124 relay circuit short is stuck ON. (Throttle control motor relay circuit is
shorted.)
+ Throttle control motor relay
+ Harness or connectors
P1126 Throttle control motor ECM detects a voltage of power source for (Throttle control motor relay circuit is
1126 relay circuit open throttle control motor is excessively low. open.)
+ Throttle control motor relay

FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MI lights up.
Engine operating condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the
return spring.

DTC Confirmation Procedure

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 DTC P1124

TESTING CONDITION:
Before performing the following procedure, confirm that
battery voltage is more than 10V at idle.

EC-309
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
With CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If DTC is detected, go to EC-312, “Diagnostic Procedure”.

SEF058Y

With GST
Follow the procedure “With CONSULT-II” above.

PROCEDURE FOR DTC P1126

With CONSULT-II
1. Turn ignition switch “ON” and wait at least 2 seconds.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 5 seconds.
4. If DTC is detected, go to EC-312, “Diagnostic Procedure”.

SEF058Y

With GST
Follow the procedure “With CONSULT-II” above.

EC-310
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC405M

EC-311
 DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

BATTERY VOLTAGE
Throttle control motor Ignition switch “OFF”
26 P/L (11 - 14V)
relay
Ignition switch “ON” 0 - 1.0V

Throttle control motor BATTERY VOLTAGE

157 G Ignition switch “ON”
power supply (11 - 14V)

Diagnostic Procedure
1 CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect throttle control motor relay.

SEC185D
3. Check voltage between throttle control motor relay terminals 2, 3 and ground.

PBIB0097E
Voltage: Battery voltage
OK or NG
OK c GO TO 3.
NG c GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.
+ 15A fuse
+ Harness for open or short between throttle control motor relay and fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-312
 DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 157 and throttle control motor relay terminal 5.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 5.
NG c GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness connectors M51, F35
+ Harness for open or short between ECM and throttle control motor relay
c Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT

1. Check continuity between ECM terminal 26 and throttle control motor relay terminal 1.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 7.
NG c GO TO 6.

6 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness connectors M55, F35
+ Harness for open or short between ECM and throttle control motor relay
c Repair open circuit or short to ground or short to power in harness or connectors.

7 CHECK THROTTLE CONTROL MOTOR RELAY

Refer to EC-314, “Component Inspection”.
OK or NG
OK c GO TO 8.
NG c Replace throttle control motor relay.

8 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-313
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY TB48DE A/T (WITH EURO-OBD)

Component Inspection
THROTTLE CONTROL MOTOR RELAY
1. Apply 12V direct current between relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5.
Conditions Continuity
12V direct current supply between
Yes
terminals 1 and 2
No current supply No
PBIB0098E
3. If NG, replace throttle control motor relay.

EC-314
 DTC P1128 THROTTLE CONTROL
MOTOR TB48DE A/T (WITH EURO-OBD)

Component Description
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides
feedback to the ECM to control the throttle control motor to make the throttle valve opening angle properly
in response to driving condition.

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1128 Throttle control motor cir- ECM detects short both circuits between + Harness or connectors
1128 cuit short ECM and throttle control motor. (Throttle control motor circuit is shorted.)
+ Electric throttle control actuator
(Throttle control motor)

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operating condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the
return spring.

DTC Confirmation Procedure

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
1. Turn ignition switch “ON” and wait at least 2 seconds.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 5 seconds.
4. If DTC is detected, go to EC-317, “Diagnostic Procedure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-315
DTC P1128 THROTTLE CONTROL
MOTOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC406M

EC-316
 DTC P1128 THROTTLE CONTROL
MOTOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

0 - 14V★

Ignition switch “ON”

Throttle control motor
151 L/W Engine stopped
(Open) Shift lever position is “D”
Accelerator pedal is depressed

PBIB0534E

0 - 14V★

Ignition switch “ON”

Throttle control motor
154 L/B Engine stopped
(Close) Shift lever position is “D”
Accelerator pedal is released

PBIB0533E

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

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

SEC690C

c GO TO 2.

EC-317
 DTC P1128 THROTTLE CONTROL
MOTOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch “OFF”.
2. Disconnect electric throttle control actuator harness connector.

SEC182D
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals.
Refer to Wiring Diagram.

MTBL1587
5. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 3.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK THROTTLE CONTROL MOTOR

Refer to EC-319, “Component Inspection”.
OK or NG
OK c GO TO 4.
NG c GO TO 5.

4 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
OK or NG
OK c GO TO 5.
NG c Repair or replace harness or connectors.

5 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

EC-318
DTC P1128 THROTTLE CONTROL
MOTOR TB48DE A/T (WITH EURO-OBD)

Component Inspection
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connec-
tor.
2. Check resistance between terminals 3 and 6.
Resistance: Approximately 1 - 15Ω [at 25°C (77°F)]
3. If NG, replace electric throttle control actuator and go to next
step.
4. Perform EC-31, “Accelerator Pedal Released Position Learn-
PBIB0095E ing”.
5. Perform EC-31, “Throttle Valve Closed Position Learning”.
6. Perform EC-31, “Idle Air Volume Learning”.

EC-319
 DTC P1143, P1163
HO2S1 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 1 is placed into the exhaust manifold.
It detects the amount of oxygen in the exhaust gas compared to
the outside air. The heated oxygen sensor 1 has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage
from approximately 1V in richer conditions to 0V in leaner con-
ditions. The heated oxygen sensor 1 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
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1) + Engine: After warming up Maintaining engine speed at 2,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S1 (B2) rpm 1.0V
HO2S1 MNTR (B1) + Engine: After warming up Maintaining engine speed at 2,000 LEAN ←→ RICH
HO2S1 MNTR (B2) rpm Changes more than 5 times
during 10 seconds.

On Board Diagnosis Logic

To judge the malfunction, the output from the heated oxygen
sensor 1 is monitored to determine whether the “rich” output is
sufficiently high and whether the “lean” output is sufficiently low.
When both the outputs are shifting to the lean side, the malfunc-
tion will be detected.

SEF300U

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1143 Heated oxygen sensor 1 The maximum and minimum voltage from + Heated oxygen sensor 1
1143 lean shift monitoring the sensor are not reached to the specified + Heated oxygen sensor 1 heater
(Bank 1) voltages. + Fuel pressure
+ Injectors
P1163
1163 + Intake air leaks
(Bank 2)

EC-320
 DTC P1143, P1163
HO2S1 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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:
+ Always perform at a temperature above −10°C (14°F).
+ Before performing following procedure, confirm that bat-
tery voltage is more than 11V at idle.
WITH CONSULT-II
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) P1143” of
“HO2S1” or “HO2S1 (B2) P1163” of “HO2S1” 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 2,800 rpm after this step. If
PBIB0546E the engine speed limit is exceeded, return to step 5.
6. When the following conditions are met, “TESTING” will be
displayed on the CONSULT-II screen. Maintain the condi-
tions continuously until “TESTING” changes to “COM-
PLETED”. (It will take approximately 50 seconds or more.)
ENG SPEED 1,050 - 2,500 rpm
Vehicle speed Less than 100 km/h (62 MPH)
B/FUEL SCHDL 5 - 16.7 msec
Selector lever Suitable position

PBIB0547E 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 EC-322, “Diagnos-
tic Procedure”.

SEC769C

EC-321
 DTC P1143, P1163
HO2S1 TB48DE A/T (WITH EURO-OBD)

Overall Function Check

Use this procedure to check the overall function of the heated
oxygen sensor 1 circuit. During this check, a DTC might not be
confirmed.

WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115 [HO2S1
(B1) signal] or 114 [HO2S1 (B2) signal] and engine ground.
3. Check one of the following with engine speed held at 2,000
rpm constant under no load.
+ The maximum voltage is over 0.6V at least one time.
+ The minimum voltage is over 0.1V at least one time.
4. If NG, go to EC-322, “Diagnostic Procedure”.

SEC184DA

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

SEC690C

c GO TO 2.

EC-322
 DTC P1143, P1163
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten corresponding heated oxygen sensor 1.

SEC888C
Tightening torque: 40 - 60 Nzm (4.1 - 6.2 kg-m, 30 - 44 ft-lb)
c GO TO 3.

EC-323
 DTC P1143, P1163
HO2S1 TB48DE A/T (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”.

SEF215Z
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.

SEC688C
5. Make sure that DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-49, “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
7. Make sure that 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 c Perform trouble diagnosis for DTC P0171, P0174. Refer to EC-218.
No c GO TO 4.

4 CHECK HEATED OXYGEN SENSOR 1 HEATER

Refer to EC-131, “Component Inspection”.
OK or NG
OK c GO TO 5.
NG c Replace malfunctioning heated oxygen sensor 1.

EC-324
 DTC P1143, P1163
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK HEATED OXYGEN SENSOR 1
Refer to EC-325, “Component Inspection”.
OK or NG
OK c GO TO 6.
NG c Replace malfunctioning heated oxygen sensor 1.

6 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT.
For circuit, refer to EC-165, “Wiring Diagram”.
c INSPECTION END

Component Inspection
HEATED OXYGEN SENSOR 1
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.

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

SEF647Y

EC-325
 DTC P1143, P1163
HO2S1 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)

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.
+ 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.

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115 [HO2S1
(B1) signal] or 114 [HO2S1 (B2) signal] and engine ground.
3. Check the following with engine speed held at 2,000 rpm
constant under no load.
+ The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
+ The maximum voltage is over 0.6V at least one time.
+ The minimum voltage is below 0.3V at least one time.
SEC184DA + The voltage never exceeds 1.0V.
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
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-326
 DTC P1144, P1164
HO2S1 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 1 is placed into the exhaust manifold.
It detects the amount of oxygen in the exhaust gas compared to
the outside air. The heated oxygen sensor 1 has a closed-end
tube made of ceramic zirconia. The zirconia generates voltage
from approximately 1V in richer conditions to 0V in leaner con-
ditions. The heated oxygen sensor 1 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
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1) + Engine: After warming up Maintaining engine speed at 2,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S1 (B2) rpm 1.0V
HO2S1 MNTR (B1) + Engine: After warming up Maintaining engine speed at 2,000 LEAN ←→ RICH
HO2S1 MNTR (B2) rpm Changes more than 5 times
during 10 seconds.

On Board Diagnosis Logic

To judge the malfunction, the output from the heated oxygen
sensor 1 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.

SEF299U

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1144 Heated oxygen sensor 1 The maximum and minimum voltages from + Heated oxygen sensor 1
1144 rich shift monitoring the sensor are beyond the specified volt- + Heated oxygen sensor 1 heater
(Bank 1) ages. + Fuel pressure
P1164 + Injectors
1164
(Bank 2)

EC-327
 DTC P1144, P1164
HO2S1 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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:
+ Always perform at a temperature above −10°C (14°F).
+ Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.

WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 5 seconds.
3. Turn ignition switch “ON” and select “HO2S1 (B1) P1144” or
“HO2S1 (B2) P1164” of “HO2S1” in “DTC WORK SUP-
PORT” 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 2,800 rpm after this step. If
the engine speed limit is exceeded, return to step 5.

PBIB0548E

6. When the following conditions are met, “TESTING” will be

displayed on the CONSULT-II screen. Maintain the condi-
tions continuously until “TESTING” changes to “COM-
PLETED”. (It will take approximately 50 seconds or more.)
ENG SPEED 1,500 - 2,500 rpm
Vehicle speed Less than 100 km/h (62 MPH)
B/FUEL SCHDL 5 - 16.7 msec
Selector lever Suitable position

PBIB0549E If “TESTING” is not displayed after 5 minutes, retry from

step 2.

EC-328
 DTC P1144, P1164
HO2S1 TB48DE A/T (WITH EURO-OBD)

7. Make sure that “OK” is displayed after touching “SELF-DIAG

RESULTS”. If “NG” is displayed, refer to EC-329, “Diagnos-
tic Procedure”.

SEC772C

Overall Function Check

Use this procedure to check the overall function of the heated
oxygen sensor 1 circuit. During this check, a DTC might not be
confirmed.

WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115 [HO2S1
(B1) signal] or 114 [HO2S1 (B2) signal] and engine ground.

3. Check one of the following with engine speed held at 2,000

rpm constant under no load.
— The maximum voltage is below 0.8V at least one time.
— The minimum voltage is below 0.32V at least one time.
4. If NG, go to EC-329, “Diagnostic Procedure”.

SEC184DA

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

SEC690C

c GO TO 2.

EC-329
 DTC P1144, P1164
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten heated oxygen sensor 1.

SEC888C
Tightening torque: 40 - 60 Nzm (4.1 - 6.2 kg-m, 30 - 44 ft-lb)
c GO TO 3.

EC-330
 DTC P1144, P1164
HO2S1 TB48DE A/T (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”.

SEF215Z
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.

SEC688C
5. Make sure that DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-49, “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
7. Make sure that 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 c Perform trouble diagnosis for DTC P0172, P0175. Refer to EC-227.
No c GO TO 4.

EC-331
 DTC P1144, P1164
HO2S1 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 CHECK HO2S1 CONNECTOR FOR WATER
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Check connectors for water.

SEC671D
Water should not exist.
OK or NG
OK c GO TO 5.
NG c Repair or replace harness or connectors.

5 CHECK HEATED OXYGEN SENSOR 1 HEATER

Refer to EC-131, “Component Inspection”.
OK or NG
OK c GO TO 6.
NG c Replace malfunctioning heated oxygen sensor 1.

6 CHECK HEATED OXYGEN SENSOR 1

Refer to EC-332, “Component Inspection”.
OK or NG
OK c GO TO 7.
NG c Replace malfunctioning heated oxygen sensor 1.

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
For circuit, refer to EC-165, “Wiring Diagram”.
c INSPECTION END

Component Inspection
HEATED OXYGEN SENSOR 1
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)” and “HO2S1 MNTR (B1)”.
4. Hold engine speed at 2,000 rpm under no load during the
following steps.

EC-332
 DTC P1144, P1164
HO2S1 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
5. Touch “RECORD” on CONSULT-II screen.

SEF646Y

6. Check the following.

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

SEF647Y

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.
+ 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.

Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 115 [HO2S1
(B1) signal] or 114 [HO2S1 (B2) signal] and engine ground.
3. Check the following with engine speed held at 2,000 rpm
constant under no load.
+ The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.
+ The maximum voltage is over 0.6V at least one time.
+ The minimum voltage is below 0.3V at least one time.
SEC184DA

EC-333
DTC P1144, P1164
HO2S1 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
+ The voltage never exceeds 1.0V.
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
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-334
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 2, 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
are shifted, the air-fuel ratio is controlled to stoichiometric, by the
signal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
Under normal conditions the heated oxygen sensor 2 is not used
SEF327R
for engine control operation.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1) + Engine: After warming up Revving engine from idle to 3,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S2 (B2) + Keeping the engine speed rpm quickly. 1.0V
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load
HO2S2 MNTR (B1) + Engine: After warming up Revving engine from idle to 3,000 LEAN ←→ RICH
HO2S2 MNTR (B2) + Keeping the engine speed rpm quickly.
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load

On Board Diagnosis Logic

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the heated oxygen sensor 1. The
oxygen storage capacity before the three way catalyst (manifold)
causes the longer switching time. To judge the malfunctions of
heated oxygen sensor 2, ECM monitors whether the minimum
voltage of sensor is sufficiently low during the various driving
condition such as fuel-cut.

SEF972Z

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1146 Heated oxygen sensor 2 The minimum voltage from the sensor is + Harness or connectors
1146 minimum voltage monitor- not reached to the specified voltage. (The sensor circuit is open or shorted.)
(Bank 1) ing + Heated oxygen sensor 2
P1166 + Fuel pressure
1166 + Injectors
(Bank 2)

EC-335
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
+ “COMPLETED” will appear on CONSULT-II screen when all tests “COND1”, “COND2” and
“COND3” are completed.
+ 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:
Never stop engine during this procedure. If the engine is stopped, retry procedure from step 2 in
“Procedure for COND1”
WITH CONSULT-II
Procedure for COND1
For the best results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30°C (32 to 86°F).
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.
4. Let engine idle for one minute.
5. Select “HO2S2 (B1) P1146” of “HO2S2” in “DTC WORK SUPPORT” mode with CONSULT-II.
6. Touch START”.
7. Let engine idle for at least 30 seconds.
8. 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.
9. When the following conditions are met, “TESTING” will be displayed at “COND1” on the CONSULT-II
screen. Maintain the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take
approximately 60 seconds.)
ENG SPEED More than 1,000 rpm
B/FUEL SCHDL More than 1.0 msec
COOLANT TEMP/S 70 - 100°C
Selector lever Suitable position

PBIB0555E

NOTE:
+ If “TESTING” is not displayed after 5 minutes, retry from step 2 in “Procedure for COND1”.
+ If “COMPLETED” already appears at “COND2” on CONSULT-II screen before “Procedure for
COND2” is conducted, it is unnecessary to conduct step 1 in “Procedure for COND2”.

EC-336
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
Procedure for COND2
1. While driving, release accelerator pedal completed with “OD”
OFF from the above condition [step 9] until “INCOMPLETE”
at “COND2” on CONSULT-II screen has turned to “COM-
PLETED” (It will take approximately 4 seconds.)
NOTE:
If “COMPLETE” already appears at “COND3” on CON-
SULT-II screen before “Procedure for COND3” is conducted,
it is unnecessary to conduct step 1 in “Procedure for
COND3”.
PBIB0556E

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 EC-342, “Diagnostic Procedure”.
If “CAN NOT BE DIAGNOSED” is displayed, perform the fol-
lowing.
a. Turn ignition switch “OFF” and leave the vehicle in a cool
SEC775C place (soak the vehicle).
b. Turn ignition switch “ON” and select “COOLANTEMP/S” in
“DATA MONITOR” mode with CONSULT-II
c. Start engine and warm it up while monitoring
“COOLANTEMP/S” indication on CONSULT-II.
d. When “COOLANTEMP/S” indication reaches to 70°C
(158°F), go to “Procedure for COND 1” step 3.

Overall Function Check

Use this procedure to check the overall function of the heated
oxygen sensor 2 circuit. During this check, a DTC might not be
confirmed.

WITH GST
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.
5. Set voltmeter probes between ECM terminal 124 [HO2S2
(B1) signal] or 123 [HO2S2 (B2) signal] and engine ground.

6. 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 pos-
sible.)
The voltage should be below 0.48V at least once during
this procedure.
If the voltage can be confirmed in step 6, step 7 is not
necessary.

SEC774D

EC-337
DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Overall Function Check (Cont’d)
7. 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 0.48V at least once during
this procedure.
8. If NG, go to EC-342, “Diagnostic Procedure”.

EC-338
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC411M

EC-339
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition.
Heated oxygen sensor 2 Revving engine from idle to 3,000 rpm quickly
124 W after the following conditions are met. 0 - Approximately 1.0V
(bank 1)
Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

EC-340
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC336M

EC-341
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition.
Heated oxygen sensor 2 Revving engine from idle to 3,000 rpm quickly
123 W after the following conditions are met. 0 - Approximately 1.0V
(bank 2)
Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

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

SEC690C

c GO TO 2.

EC-342
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
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”.

SEF215Z
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.

SEC688C
5. Make sure that DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-49, “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
7. Make sure that 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 c Perform trouble diagnosis for DTC P0172, P0175. Refer to EC-227.
No c GO TO 3.

EC-343
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.

SEC669D
3. Disconnect ECM harness connector.
4. Check harness continuity between HO2S2 terminal 4 and ground.
Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 5.
NG c GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
+ Joint connector-7
+ Harness for open or short between heated oxygen sensor 2 and ground
c Repair open circuit or short to power in harness or connectors.

EC-344
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.

MTBL1588
Continuity should exist.
2. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

MTBL1589
Continuity should not exist.
3. Also check harness for short to power.
OK or NG
OK c GO TO 6.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK HEATED OXYGEN SENSOR 2

Refer to EC-345, “Component Inspection”.
OK or NG
OK c GO TO 7.
NG c Replace heated oxygen sensor 2.

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
HEATED OXYGEN SENSOR 2
With CONSULT-II
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle one minute.

EC-345
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
5. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and
select “HO2S2 (B1)/(B2)” as the monitor item with CON-
SULT-II.

SEF662Y

6. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting

“FUEL INJECTION” to ±25%.

SEF972YA

“HO2S2 (B1)/(B2)” should be above 0.68V at least once

when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V 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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

Without CONSULT-II
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.
5. Set voltmeter probes between ECM terminal 124 [HO2S2
(B1) signal] or 123 [HO2S2 (B2) signal] and engine ground.

EC-346
 DTC P1146, P1166
HO2S2 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
6. 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 pos-
sible.)
The voltage should be above 0.68V at least once during
this procedure.
If the voltage is above 0.68V at step 6, step 7 is not nec-
essary.
7. Keep vehicle at idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in
SEC774D “D” position with “OD” OFF.
The voltage should be below 0.48V at least once during
this procedure.
8. If NG, replace heated oxygen sensor 2.
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-347
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)

Component Description
The heated oxygen sensor 2, 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
are shifted, the air-fuel ratio is controlled to stoichiometric, by the
signal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
Under normal conditions the heated oxygen sensor 2 is not used
SEF327R
for engine control operation.
CONSULT-II Reference Value in Data Monitor
Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1) + Engine: After warming up Revving engine from idle to 3,000 0 - 0.3V ←→ Approx. 0.6 -
HO2S2 (B2) + Keeping the engine speed rpm quickly. 1.0V
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load
HO2S2 MNTR (B1) + Engine: After warming up Revving engine from idle to 3,000 LEAN ←→ RICH
HO2S2 MNTR (B2) + Keeping the engine speed rpm quickly.
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load

On Board Diagnosis Logic

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the heated oxygen sensor 1. The
oxygen storage capacity before the three way catalyst (manifold)
causes the longer switching time. To judge the malfunctions of
heated oxygen sensor 2, ECM monitors whether the maximum
voltage of the sensor is sufficiently high during the various driv-
ing condition such as fuel-cut.

SEF259VA

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1147 Heated oxygen sensor 2 The maximum voltage from the sensor is + Harness or connectors
1147 maximum voltage moni- not reached to the specified voltage. (The sensor circuit is open or shorted.)
(Bank 1) toring + Heated oxygen sensor 2
P1167 + Fuel pressure
1167 + Injectors
(Bank 2) + Intake air leaks

EC-348
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
+ “COMPLETED” will appear on CONSULT-II screen when all tests “COND1”, “COND2” and
“COND3” are completed.
+ 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:
Never stop engine during this procedure. If the engine is stopped, retry procedure from step 2 in
“Procedure for COND1”
WITH CONSULT-II
Procedure for COND1
For the best results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30°C (32 to 86°F).
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.
4. Let engine idle for one minute.
5. Select “HO2S2 (B1) P1147” or “HO2S2 (B2) P1167” of “HO2S2” in “DTC WORK SUPPORT” mode with
CONSULT-II.
6. Touch “START”.
7. Let engine idle for at least 30 seconds.
8. 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.
9. When the following conditions are met, “TESTING” will be displayed at “COND1” on the CONSULT-II
screen. Maintain the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take
approximately 60 seconds.)
ENG SPEED More than 1,000 rpm
B/FUEL SCHDL More than 1.0 msec
COOLANT TEMP/S 70 - 100°C
Selector lever Suitable position

PBIB0557E

NOTE:
+ If “TESTING” is not displayed after 5 minutes, retry from step 2 in Procedure for COND1”.
+ If “COMPLETED” already appears at “COND2” on CONSULT-II screen before “Procedure for
COND2” is conducted, it is unnecessary to conduct step 1 in “Procedure for COND2”.

EC-349
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
Procedure for COND2
1. While driving, release accelerator pedal completed with “OD”
OFF from the above condition [step 9] until “INCOMPLETE”
at “COND2” on CONSULT-II screen has turned to “COM-
PLETED” (It will take approximately 4 seconds.)
NOTE:
If “COMPLETE” already appears at “COND3” on CON-
SULT-II screen before “Procedure for COND3” is conducted,
it is unnecessary to conduct step 1 in “Procedure for
COND3”.
PBIB0558E

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 EC-355, “Diagnostic Procedure”.
If “CAN NOT BE DIAGNOSED” is displayed, perform the fol-
lowing.
a. Turn ignition switch “OFF” and leave the vehicle in a cool
SEC778C place (soak the vehicle).
b. Turn ignition switch “ON” and select “COOLANTEMP/S” in
“DATA MONITOR” mode with CONSULT-II
c. Start engine and warm it up while monitoring
“COOLANTEMP/S” indication on CONSULT-II.
d. When “COOLANTEMP/S” indication reaches to 70°C
(158°F), go to “Procedure for COND 1” step 3.

Overall Function Check

Use this procedure to check the overall function of the heated
oxygen sensor 2 circuit. During this check, a DTC might not be
confirmed.

WITH GST
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.
5. Set voltmeter probes between ECM terminal 124 [HO2S2
(B1) signal] or 123 [HO2S2 (B2) signal] and engine ground.

6. 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 pos-
sible.)
The voltage should be above 0.68V at least once during
this procedure.
If the voltage can be confirmed in step 6, step 7 is not
necessary.

SEC774D

EC-350
DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Overall Function Check (Cont’d)
7. Keep vehicle 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 0.68V at least once during
this procedure.
8. If NG, go to EC-355, “Diagnostic Procedure”.

EC-351
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)

Wiring Diagram
BANK 1

TEC411M

EC-352
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition.
Heated oxygen sensor 2 Revving engine from idle to 3,000 rpm quickly
124 W after the following conditions are met. 0 - Approximately 1.0V
(bank 1)
Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

EC-353
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
BANK 2

TEC336M

EC-354
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Warm-up condition.
Heated oxygen sensor 2 Revving engine from idle to 3,000 rpm quickly
123 W after the following conditions are met. 0 - Approximately 1.0V
(bank 2)
Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

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

SEC690C

c GO TO 2.

EC-355
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
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”.

SEF215Z
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.

SEC688C
5. Make sure that DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-49, “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
7. Make sure that 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 c Perform trouble diagnosis for DTC P0171, P0174. Refer to EC-218.
No c GO TO 3.

EC-356
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.

SEC669D
3. Disconnect ECM harness connector.
4. Check harness continuity between HO2S2 terminal 4 and ground.
Refer to Wiring Diagram.
Continuity should exist.

5. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 5.
NG c GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
+ Joint connector-7
+ Harness for open or short between heated oxygen sensor 2 and ground
c Repair open circuit or short to power in harness or connectors.

EC-357
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.

MTBL1590
Continuity should exist.
2. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

MTBL1591
Continuity should not exist.
3. Also check harness for short to power.
OK or NG
OK c GO TO 6.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK HEATED OXYGEN SENSOR 2

Refer to EC-358, “Component Inspection”.
OK or NG
OK c GO TO 7.
NG c Replace heated oxygen sensor 2.

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
HEATED OXYGEN SENSOR 2
With CONSULT-II
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.

EC-358
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
5. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and
select “HO2S2 (B1)/(B2)” as the monitor item with CON-
SULT-II.

SEF662Y

6. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting

“FUEL INJECTION” to ±25%.

SEF972YA

“HO2S2 (B1)/(B2)” should be above 0.68V at least once

when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V 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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

Without CONSULT-II
1. Start engine and warm it up to the normal operating tempera-
ture.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.
5. Set voltmeter probes between ECM terminal 124 [HO2S2
(B1) signal] or 123 [HO2S2 (B2) signal] and engine ground.

EC-359
 DTC P1147, P1167
HO2S2 TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
6. 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 pos-
sible.)
The voltage should be above 0.68V at least once during
this procedure.
If the voltage is above 0.68V at step 6, step 7 is not nec-
essary.
7. Keep vehicle idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in
SEC774D “D” position with “OD” OFF.
The voltage should be below 0.56V at least once during
this procedure.
8. If NG, replace heated oxygen sensor 2.
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.
+ Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubri-
cant.

EC-360
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)

System Description
Vehicle speed
Vehicle speed sensor c

Engine coolant temperature

Engine coolant temperature sensor c ECM c Cooling fan relays

Air conditioner “ON” signal

Air conditioner switch c

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, and air
conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].

Operation

SEC775D

CONSULT-II Reference Value In Data Monitor

Mode
Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
Engine coolant temperature is 94°C
OFF
(201°F) or less.
+ After warming up engine, idle the
engine. Engine coolant temperature is between
COOLING FAN LOW
+ Air conditioner switch “OFF” 95°C (203°F) and 99°C (210°F)
+ Vehicle stopped
Engine coolant temperature is 100°C
HIGH
(212°F) or more.
Air conditioner switch: “OFF” OFF
+ Engine: After warming up, idle the
AIR COND SIG Air conditioner switch: “ON”
engine ON
(Compressor operates.)

EC-361
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)

ECM Terminals and Reference Value

Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE DATA
MINAL ITEM CONDITION
COLOR (DC voltage)
NO.
Engine is running. BATTERY VOLTAGE
Cooling fan is not operating. (11 - 14V)
Cooling fan relay (Low
56 L
speed) Engine is running.
Approximately 0V
Cooling fan is operating.
Engine is running.
BATTERY VOLTAGE
Cooling fan is not operating. (11 - 14V)
Cooling fan relay Cooling fan is operating at low speed.
55 L/B
(High speed)
Engine is running.
Approximately 0V
Cooling fan is operating at high speed.

On Board Diagnosis Logic

This diagnosis continuously monitors the engine coolant temperature.
If the cooling fan or another component in the cooling system malfunctions, the engine coolant temperature
will rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
detected by the ECM and the MIL lights on.
Diagnostic trouble Check Items
Malfunction is detected when ...
code No. (Possible Cause)
P1217 + Cooling fan does not operate properly (Overheat). + Harness or connectors
1217 + Cooling fan system does not operate properly (Over- (The cooling fan circuit is open or shorted)
heat). + Cooling fan
+ Engine coolant was not added to the system using + Thermostat
the proper filling method. + Improper ignition timing
+ Engine coolant temperature sensor
+ Blocked radiator
+ Blocked front end (Improper fitting of nose
mask)
+ Crushed vehicle frontal area (Vehicle frontal
is collided but not repaired)
+ Blocked air passage by improper installation
of front fog lamp or fog lamps.
+ Improper mixture ratio of coolant
+ Damaged bumper
For more information, refer to “MAIN 12
CAUSES OF OVERHEATING”, EC-370.

CAUTION:
When a malfunction is indicated, be sure to replace the coolant following the procedure in the MA
section (“Changing Engine Coolant”, “ENGINE MAINTENANCE”). Also, replace the engine oil.
a. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute like pour-
ing coolant by kettle. Be sure to use coolant with the proper mixture ratio. Refer to MA section
(“Anti-freeze Coolant Mixture Ratio”, “RECOMMENDED LUBRICANTS AND FLUIDS”).
b. After refilling coolant, run engine to ensure that no water-flow noise is emitted.

EC-362
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)

Overall Function Check

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. Seri-
ous 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.
AEC640

With CONSULT-II
1) Check the coolant level and mixture ratio (using coolant
tester) in the reservoir tank and radiator.
Allow engine to cool before checking coolant level and
mixture ratio.
+ If the coolant level in the reservoir tank and/or radiator is
below the proper range, skip the following steps and go to
“Diagnostic Procedure”, EC-365.
+ If the coolant mixture ratio is out of the range of 45 to 55%
(varies depending on destinations), replace the coolant in the
SEF646X following procedure LC section, “Changing Engine Coolant”.
2) Confirm whether customer filled the coolant or not. If cus-
tomer filled the coolant, skip the following steps and go to
“Diagnostic Procedure”, EC-365.
3) Turn ignition switch “ON”.
4) Perform “COOLING FAN” in “ACTIVE TEST” mode with
CONSULT-II.
5) If the results are NG, go to “Diagnostic Procedure”, EC-365.

Without CONSULT-II
1) Check the coolant level and mixture ratio (using coolant
SEC163BA
tester) in the reservoir tank and radiator.
Allow engine to cool before checking coolant level and
mixture ratio.
If the coolant level in the reservoir tank and/or radiator is
below the proper range, skip the following steps and go to
“Diagnostic Procedure”, EC-365.
+ If the coolant mixture ratio is out of the range of 45 to 55%
(varies depending on destinations), replace the coolant in the
following procedure LC section, “Changing Engine Coolant”.
2) Confirm whether customer filled the coolant or not. If cus-
tomer filled the coolant, skip the following steps and go to
“Diagnostic Procedure”, EC-365.
3) Start engine.
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 air conditioner
operating.
Be careful not to overheat engine.
8) Make sure that cooling fan operates. Refer to “OPERATION”
table of Cooling fan, EC-361.
If NG, go to “Diagnostic Procedure”, EC-365.

EC-363
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC151M

EC-364
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
INSPECTION START

.
Do you have CONSULT-II? No GO TO V A Without CON-
c
SULT-II.
Yes
.
CHECK COOLING FAN LOW SPEED NG GO TO V C . Check cooling
c
OPERATION. fan low speed control cir-
SEC698C cuit.
With CONSULT-II
1. Disconnect cooling fan relay-2 and -3.
2. Turn ignition switch “ON”.
3. Perform “COOLING FAN” in “ACTIVE
TEST” mode with CONSULT-II.
4. Make sure that cooling fans-1 and -2
operate at low speed.
OK
.
CHECK COOLING FAN HIGH SPEED NG GO TO V D . Check cooling
c
OPERATION. fan high speed control cir-
SEF646X
cuit.
With CONSULT-II
1. Turn ignition switch “OFF”.
2. Reconnect cooling fan relay-2 and -3.
3. Turn ignition switch “ON”.
4. Perform “COOLING FAN” in “ACTIVE
TEST” mode with CONSULT-II.
5. Make sure that cooling fans-1 and -2
operate at high speed.
OK
.
GO TO V
B .
SEF111X

EC-365
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
A
V

.
CHECK COOLING FAN LOW SPEED NG GO TO V C . Check cooling
c
OPERATION. fan low speed control cir-
cuit.
Without CONSULT-II
1. Disconnect cooling fan relays-2 and -3.
2. Start engine and let it idle.
3. Set temperature lever at full cold posi-
SEC698C tion.
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.
OK
.
CHECK COOLING FAN HIGH SPEED NG GO TO V D . Check cooling
c
OPERATION. fan high speed control cir-
cuit.
Without CONSULT-II
1. Turn ignitions witch “OFF”.
SEC163BA 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 cool-
ing fans-1 and -2 operate at high speed.
OK
.
GO TO V
B .
SEC322D

EC-366
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
B
V

.
CHECK COOLING SYSTEM FOR LEAK. NG Check the following for
c
Apply pressure to the cooling system with leak.
a tester, and check if the pressure drops. + Hose
Testing pressure: + Radiator
157 kPa (1.6 kg/cm2, 23 psi) + Water pump (Refer to
CAUTION: LC section, “Water
Higher than the specified pressure may Pump”.)
cause radiator damage. If NG, repair or replace.
SLC754A
Pressure should not drop.
OK
.
CHECK RADIATOR CAP. NG Replace radiator cap.
c
Apply pressure to cap with a tester and
check radiator cap relief pressure.
Radiator cap relief pressure:
For the Middle East:
78 - 98 kPa (0.78 - 0.98 bar, 0.8 -
1.0 kg/cm2, 11 - 14 psi)
Except above:
108 - 127 kPa (1.08 - 1.27 bar,
SLC755A 1.1 - 1.3 kg/cm2, 16 - 18 psi)
OK
.
CHECK THERMOSTAT. NG Replace thermostat.
c
1. Remove thermostat.
2. Check valve seating condition at normal
room temperatures.
It should seat tightly.
3. Check valve opening temperature and
valve lift.
Valve opening temperature:
76.5°C (170°F) [standard]
SLC343 Valve lift:
More than 10 mm/90°C (0.39
in/194°F)
4. Check if valve is closed at 5°C (9°F)
below valve opening temperature. For
details, refer to LC section, “Thermo-
stat”.
OK
.
CHECK ENGINE COOLANT TEMPERA- NG Replace engine coolant
c
TURE SENSOR. temperature sensor.
Refer to “COMPONENT INSPECTION”,
EC-156.
OK
.
CHECK MAIN 12 CAUSES.
If the cause cannot be isolated, go to
“MAIN 12 CAUSES OF OVERHEATING”,
EC-370.

.
CHECK INSPECTION END

EC-367
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
C
V
.
NG
CHECK COOLING FAN POWER SUP- c
Check the following.
PLY CIRCUIT. + 10A fuse
1. Turn ignition switch “OFF”. + 40A fusible links
2. Disconnect cooling fan relay-1. + Harness for open or
3. Turn ignition switch “ON”. short between cooling
4. Check voltage between cooling fan fan relay-1 and fuse
relay-1 terminals V1 ,V3 ,V 6 and + Harness for open or
ground with CONSULT-II or tester. short between cooling
Battery voltage fan relay-1 and battery
If NG, repair open circuit or
SEC699C OK short to ground to short to
power in harness or con-
nectors.

.
NG
CHECK COOLING FAN GROUND CIR- c
Repair open circuit or short
CUIT FOR OPEN AND SHORT to ground or short to power
1. Turn ignition switch “OFF”. in harness or connectors.
2. Disconnect cooling fan motor-1 harness
connector and cooling fan motor-2 har-
ness connector.
3. Check harness continuity between cool-
ing fan relay-1 terminal V5 and cooling
fan motor-1 terminal V 1 , cooling fan
motor-1 terminal V 4 and body ground.
SEC700C Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground
and short to power.
5. Check harness continuity between cool-
ing fan relay-1 terminal V7 and cooling
fan motor-2 terminal V 1 , cooling fan
motor-2 terminal V 4 and body ground.
Refer to Wiring Diagram.
Continuity should exist.
6. Also check harness for short to ground
and short to power.
OK
.
NG
CHECK COOLING FAN OUTPUT SIGNAL c
Check the following.
CIRCUIT FOR OPEN AND SHORT. + Harness connectors
1. Disconnect ECM harness connector. E127 , M21
2. Check harness continuity between ECM + Harness connectors
terminal V
56 and cooling fan relay-1 ter- M52 , F7
minal V2 . Refer to Wiring Diagram. + Harness for open or
Continuity should exist. short between cooling
3. Also check harness for short to ground fan relay-1 and ECM
and short to power. If NG, repair open circuit or
short to ground or short to
OK power in harness or con-
nectors.
.
NG
CHECK COOLING FAN RELAY-1. c
Replace cooling fan relay.
Refer to “Component Inspection”, EC-371
OK
.
NG
CHECK COOLING FAN MOTORS-1 AND c
Replace cooling fan
-2. motors.
Refer to “Component Inspection”, EC-371.
OK
.
CHECK INTERMITTENT INCIDENT.
Perform “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-112.
OK
.
INSPECTION END

EC-368
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
D
V

.
CHECK COOLING FAN POWER SUPPLY CIR- NG Check the following.
c
CUIT. + Harness for open or short
1. Turn ignition switch “OFF”. between cooling fan relays-2
2. Disconnect cooling fan relays-2 and -3. and -3 and 10A fuse
3. Turn ignition switch “ON”. + Harness for open or short
4. Check voltage between cooling fan relays-2 between cooling fan relays-2
and -3 terminals V 1 ,V6 and ground with and fusible link
CONSULT-II or tester. If NG, repair harness or con-
SEC780C Battery voltage nectors.

OK
.
CHECK COOLING FAN GROUND CIRCUIT NG Repair open circuit or short to
c
FOR OPEN AND SHORT ground or short to power in
1. Turn ignition switch “OFF”. harness or connectors.
2. Disconnect cooling fan motor-1 harness con-
nector and cooling fan motor-2 harness con-
nector.
3. Check harness continuity between cooling fan
relay-2 terminal V7 and cooling fan motor-1
terminal V2 , cooling fan relay-2 terminal V 3
and cooling fan motor-1 terminal V 3 , cooling
fan relay-2 terminal V5 and body ground.
SEC698C 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 V7 and cooling fan motor-2
terminal V2 , cooling fan relay-3 terminal V 3 ,
cooling fan relay-2 terminal V5 .
Refer to Wiring Diagram.
Continuity should exist.
6. Also check harness for short to ground and
short to power.

OK
.
SEC700C CHECK COOLING FAN OUTPUT SIGNAL CIR- NG Check the following.
c
CUIT FOR OPEN AND SHORT. + Harness connectors E127 ,
1. Disconnect ECM harness connector. M21
2. Check harness continuity between ECM ter- + Harness connectors M52 ,
minal V55 and cooling fan relay-2 terminal V
2 , F7
cooling fan relay-3 terminal V
2 . + Harness for open or short
Refer to Wiring Diagram. between cooling fan relay-2
Continuity should exist. and -3 and ECM
3. Also check harness for short to ground and If NG, repair open circuit or
short power. short to ground or short to
power in harness or connec-
OK
tors.
.
CHECK COOLING FAN RELAYS-2 AND -3. NG Replace cooling fan relays.
c
Refer to “Component Inspection”, EC-371.

OK
.
CHECK COOLING FAN MOTORS. NG Replace cooling fan motors.
c
Refer to “Component Inspection”, EC-371.

OK
.
CHECK INTERMITTENT INCIDENT.
Perform “TROUBLE DIAGNOSIS FOR INTER-
MITTENT INCIDENT”, EC-112.

OK
.
INSPECTION END

EC-369
 DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)

Main 12 Causes of Overheating

Engine Step Inspection item Equipment Standard Reference page
OFF 1 + Blocked radiator + Visual No blocking —
+ Blocked condenser
+ Blocked radiator grille
+ Blocked bumper
2 + Coolant mixture + Coolant tester 30 - 50% coolant mixture See “RECOMMENDED
FLUIDS AND LUBRI-
CANTS” in MA section.
3 + Coolant level + Visual Coolant up to MAX level See “Changing Engine
in reservoir tank and Coolant”, “ENGINE MAIN-
radiator filler neck TENANCE” in MA sec-
tion.
4 + Radiator cap + Pressure tester 108 - 127 kPa See “System Check”,
(1.08 - 1.27 bar, 1.1 - 1.3 “ENGINE COOLING SYS-
kg/cm2, 16 - 18 psi) TEM” in LC section.
59 - 98 kPa (0.59 - 0.98
bar, 0.6 - 1.0 kg/cm2,
9 - 14 psi) (Limit)
ON*2 5 + Coolant leaks + Visual No leaks See “System Check”,
“ENGINE COOLING SYS-
TEM” in LC section.
ON*2 6 + Thermostat + Touch the upper and Both hoses should be hot. See “Thermostat” and
lower radiator hoses “Radiator”, “ENGINE
COOLING SYSTEM” in
LC section.
ON*1 7 + Cooling fan + Visual (Coupling) Operating See “TROUBLE DIAGNO-
+ CONSULT-II SIS FOR DTC P1217”,
EC-361.
OFF 8 + Combustion gas leak + Color checker chemical Negative —
tester 4 gas analyzer
ON*3 9 + Coolant temperature + Visual Gauge less than 3/4 —
gauge when driving
+ Coolant overflow to res- + Visual No overflow during driving See “Changing Engine
ervoir tank and idling Coolant”, “ENGINE MAIN-
TENANCE” in MA sec-
tion.
OFF*4 10 + Coolant return from res- + Visual Should be initial level in See “ENGINE MAINTE-
ervoir tank to radiator reservoir tank NANCE” in MA section.
OFF 11 + Cylinder head + Straight gauge feeler 0.1 mm (0.004 in) Maxi- See “Inspection”, “CYLIN-
gauge mum distortion (warping) DER HEAD” in EM sec-
tion.
12 + Cylinder block and pis- + Visual No scuffing on cylinder See “Inspection”, “CYLIN-
tons walls or piston DER BLOCK” in EM sec-
tion.
*1: Engine running at idle for coupling type. Turn ignition switch ON for electrical cooling fan.
*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 “OVERHEATING CAUSE ANALYSIS” in LC section.

EC-370
DTC P1217 ENGINE OVER TEMPERATURE
(OVERHEAT) TB48DE A/T (WITH EURO-OBD)

Component Inspection
COOLING FAN RELAYS-1, -2 AND -3
Check continuity between terminals V
3 and V
5 ,V
6 and V
7 .
Conditions Continuity
12V direct current supply between terminals 1 and Yes
2
No current supply No

SEF745U If NG, replace relay.

COOLING FAN MOTORS-1 AND -2

1. Disconnect cooling fan motor harness connectors.
2. Supply cooling fan motor terminals with battery voltage and
check operation.
Terminals
Speed (+) (−)
Cooling fan motor Low 1 4
High 1, 2 3, 4
SEF734W
Cooling fan motor should operate.
If NG, replace cooling fan motor.

EC-371
 DTC P1225 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
Electric Throttle Control Actuator consists of throttle control
motor, throttle position sensor, etc. The throttle position sensor
responds to the throttle valve movement.
The throttle position sensor has the two sensors. These sensors
are a kind of potentiometers which transform the throttle valve
position into output voltage, and emit the voltage signal to the
ECM. In addition, these sensors detect the opening and closing
speed of the throttle valve and feed the voltage signals to the
ECM. The ECM judges the current opening angle of the throttle
PBIB0145E
valve from these signals and the ECM controls the throttle con-
trol motor to make the throttle valve opening angle properly in
response to driving condition.

On Board Diagnosis Logic

The MI will not light up for this self-diagnosis.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1225 Closed throttle position Closed throttle position learning value is + Electric throttle control actuator
1225 learning performance excessively low. (TP sensor 1 and 2)
problem

DTC Confirmation Procedure

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
battery voltage is more than 10V at idle.

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch “OFF”, wait at least 10 seconds.
4. Turn ignition switch “ON”.
5. If 1st trip DTC is detected, go to EC-373, “Diagnostic Proce-
dure”.

WITH GST
Follow the procedure “With CONSULT-II” above.
SEF058Y

EC-372
 DTC P1225 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch “OFF”.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve and the housing.

SEC183D
OK or NG
OK c GO TO 2.
NG c Remove the foreign matter and clean the electric throttle control actuator inside.

2 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

EC-373
 DTC P1226 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
Electric Throttle Control Actuator consists of throttle control
motor, throttle position sensor, etc. The throttle position sensor
responds to the throttle valve movement.
The throttle position sensor has the two sensors. These sensors
are a kind of potentiometers which transform the throttle valve
position into output voltage, and emit the voltage signal to the
ECM. In addition, these sensors detect the opening and closing
speed of the throttle valve and feed the voltage signals to the
ECM. The ECM judges the current opening angle of the throttle
PBIB0145E
valve from these signals and the ECM controls the throttle con-
trol motor to make the throttle valve opening angle properly in
response to driving condition.

On Board Diagnosis Logic

The MI will not light up for this self-diagnosis.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1226 Closed throttle position Closed throttle position learning is not per- + Electric throttle control actuator
1226 learning performance formed successfully, repeatedly. (TP sensor 1 and 2)
problem

DTC Confirmation Procedure

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
battery voltage is more than 10V at idle.

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch “OFF”, wait at least 10 seconds.
4. Turn ignition switch “ON”.
5. Repeat steps 3 and 4, 32 times.
6. If 1st trip DTC is detected, go to EC-375, “Diagnostic Proce-
dure”.

WITH GST
SEF058Y
Follow the procedure “With CONSULT-II” above.

EC-374
 DTC P1226 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch “OFF”.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve and the housing.

SEC183D
OK or NG
OK c GO TO 2.
NG c Remove the foreign matter and clean the electric throttle control actuator inside.

2 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

EC-375
 DTC P1229 SENSOR POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1229 Sensor power supply cir- ECM detects a voltage of power source for + Harness or connectors
1229 cuit short sensor is excessively low or high. (The TP sensor 1 and 2 circuit is
shorted.)
(APP sensor circuit is shorted.)
(MAF sensor circuit is shorted.)
(Power steering pressure sensor circuit
is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
+ Electric throttle control actuator
(TP sensor 1 and 2)
+ Accelerator pedal position sensor (APP
sensor 1)
+ MAF sensor
+ Power steering pressure sensor
+ Refrigerant pressure sensor
+ ECM pin terminal

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operation condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the
return spring.

DTC Confirmation Procedure

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
battery voltage is more than 10V at idle.

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-378, “Diagnostic Procedure”.

WITH GST
Follow the procedure “WITH CONSULT-II” above.

SEF058Y

EC-376
DTC P1229 SENSOR POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC407M

EC-377
 DTC P1229 SENSOR POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

103 Y Sensors’ power supply Ignition switch “ON” Approximately 5V

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

SEC690C

c GO TO 2.

EC-378
 DTC P1229 SENSOR POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect electric throttle control actuator harness connector.

SEC182D
2. Turn ignition switch “ON”.
3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.

PBIB0082E
Voltage: Approximately 5V
OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 CHECK SENSOR POWER SUPPLY CIRCUITS FOR SHORT

Check the following.
+ Harness for short to power and short to ground, between the following terminals.

MTBL1592
+ ECM pin terminal.
OK or NG
OK c GO TO 4.
NG c Repair short to ground or short to power in harness or connectors.

EC-379
 DTC P1229 SENSOR POWER
SUPPLY TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 CHECK COMPONENTS
Check the following.
+ Accelerator pedal position sensor (Refer to EC-427, “Component Inspection”.)
+ Mass air flow sensor (Refer to EC-146, “Component Inspection”.)
+ Power steering pressure sensor (Refer to EC-282, “Component Inspection”.)
OK or NG
OK c GO TO 7.
NG c Replace malfunctioning component.

5 CHECK THROTTLE POSITION SENSOR

Refer to EC-420, “Component Inspection”.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

6 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-380
 DTC P1336 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)

Component Description
The crankshaft position sensor (OBD) is located on the transmis-
sion housing facing the gear teeth (cogs) of the flywheel or drive
plate. It detects the fluctuation of the engine revolution.
The sensor consists of a permanent magnet, core and coil.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor
SEF804Z
changes.
The ECM receives the voltage signal and detects the fluctuation
of the engine revolution.
This sensor is not used to control the engine system.
It is used only for the on board diagnosis.

SEC732D

ECM Terminals and Reference Value

Specification data are reference values and are measured between each terminal and 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 the ECM terminals, such as the ground.
TER-
WIRE
MINAL ITEM CONDITION DATA (AC Voltage)
COLOR
NO.

Approximately 1 - 2V★

Engine is running.

Warm-up condition.
Idle speed

SEC748D
Crankshaft position sen-
111 W 3 - 4V★
sor (OBD)
(AC range)

Engine is running.

Engine speed is 2,000 rpm

SEC749D

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

EC-381
 DTC P1336 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)

On Board Diagnosis Logic

Malfunction is detected when a chipping of the flywheel or drive
plate gear tooth (cog) is detected by the ECM.

POSSIBLE CAUSE
+ Harness or connectors
+ Crankshaft position sensor (OBD)
+ Drive plate/Flywheel

DTC Confirmation Procedure

NOTE:
If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch OFF and wait at least
5 seconds before conducting the next test.

With CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode
with CONSULT-II.
2. Start engine and run it for at least 2 minutes at idle speed.
3. If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-384.

With GST
Follow the procedure “With CONSULT-II”.
SEF058Y

EC-382
DTC P1336 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC344M

EC-383
 DTC P1336 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.

SEC690C

c GO TO 2.

2 CHECK CKPS (OBD) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect crankshaft position sensor (OBD) and ECM harness connectors.

SEC732D
2. Check continuity between ECM terminal 111 and sensor terminal 1.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E201, E70
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Harness for open or short between ECM and crankshaft position sensor (OBD)
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-384
 DTC P1336 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 CHECK CKPS (OBD) GROUND CIRCUIT FOR OPEN AND SHORT
1. Reconnect ECM harness connectors.
2. Check harness continuity between CKPS (OBD) terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E202, E69
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Harness for open between crankshaft position sensor (OBD) and ECM
c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK IMPROPER INSTALLATION

1. Loosen and retighten the fixing bolt of the crankshaft position sensor (OBD).
2. Perform “DTC Confirmation Procedure”, again.
Is a 1st trip DTC P1336 detected?
Yes or No
Yes c GO TO 7.
No c INSPECTION END

EC-385
 DTC P1336 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
7 CHECK CRANKSHAFT POSITION SENSOR (OBD)
1. Disconnect crankshaft position sensor (OBD) harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.
4. Visually check the sensor for chipping.

SEF960N
5. Check resistance as shown in the figure.

SEF504V
Resistance: Approximately 512 - 632Ω [at 20°C (68°F)]
OK or NG
OK c GO TO 8.
NG c Replace crankshaft position sensor (OBD).

8 CHECK CKPS (OBD) SHIELD CIRCUIT FOR OPEN AND SHORT

1. Disconnect harness connectors E201, E70.
2. Check harness continuity between harness connector E70 terminal 10 and engine ground.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK c GO TO 10.
NG c GO TO 9.

9 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E201, E70
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Joint connector-7
+ Harness for open between harness connector F38 and engine ground
c Repair open circuit or short to power in harness or connectors.

EC-386
 DTC P1336 CKP SENSOR
(OBD) TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
10 CHECK GEAR TOOTH
Visually check for chipping flywheel or drive plate gear tooth (cog).
OK or NG
OK c GO TO 11.
NG c Replace the flywheel or drive plate.

11 CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-112.
c INSPECTION END

EC-387
 DTC P1706 PNP
SWITCH TB48DE A/T (WITH EURO-OBD)

Component Description
When the shift lever position is “P” or “N”, park/neutral position (PNP) switch is “ON”.
ECM detects the position because the continuity of the line (the “ON” signal) exists.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
P/N POSI SW + Ignition switch: ON Shift lever: P or N ON
Shift lever: Except above OFF

On Board Diagnosis Logic

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1706 Park/neutral position The signal of the park/neutral position + Harness or connectors
1706 switch (PNP) switch is not changed in the pro- (PNP switch circuit is open or shorted.)
cess of engine starting and driving. + Park/neutral position (PNP) switch

DTC Confirmation Procedure

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
1. Turn ignition switch “ON”.
2. Select “P/N POSI SW” in “DATA MONITOR” mode with
CONSULT-II. Then check the “P/N POSI SW” signal under
the following conditions.
Position (Selector lever) Known-good signal
“N” and “P” position ON
Except the above position OFF

SEF212Y
If NG, go to EC-392, “Diagnostic Procedure”.
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 1,250 - 6,375 rpm
COOLAN TEMP/S More than 70°C (158°F)
B/FUEL SCHDL More than 5 msec
VHCL SPEED SE More than 64 km/h (40 MPH)
Selector lever Suitable position
SEF213Y

EC-388
 DTC P1706 PNP
SWITCH TB48DE A/T (WITH EURO-OBD)
DTC Confirmation Procedure (Cont’d)
6. If 1st trip DTC is detected, go to EC-392, “Diagnostic Proce-
dure”.

Overall Function Check

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
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 80 (PNP switch signal)
and body ground under the following conditions.
Condition (Gear position) Voltage V (Known-good data)
“P” and “N” position Approximately 0
Except the above position Battery voltage

3. If NG, go to EC-392, “Diagnostic Procedure”.

PBIB0169E

EC-389
DTC P1706 PNP
SWITCH TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC420M

EC-390
DTC P1706 PNP
SWITCH TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)

TEC421M

EC-391
 DTC P1706 PNP
SWITCH TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Ignition switch “ON”

Approximately 0V
Shift lever position is “P” or “N”.
80 R/PU PNP switch
Ignition switch “ON” BATTERY VOLTAGE
Except the above gear position (11 - 14V)

Diagnostic Procedure
1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes c GO TO 2.
No c GO TO 3.

2 CHECK PNP SWITCH SIGNAL

1. Turn ignition switch “ON”.
2. Select “A/T”, then “DATA MONITOR” mode while CONSULT-II.
3. Select “P/N POSI SW” signal and check its indication under the following conditions.

PBIB0102E

MTBL1597
OK or NG
OK c GO TO 5.
NG c GO TO 4.

EC-392
 DTC P1706 PNP
SWITCH TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK PNP SWITCH SIGNAL
Confirm that the PNP switch signal is sent to TCM correctly.
Refer to AT section.
OK or NG
OK c GO TO 5.
NG c GO TO 4.

4 CHECK PNP SWITCH CIRCUIT

Check the PNP switch circuit.
Refer to AT section.
c INSPECTION END

5 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Disconnect TCM harness connector.

SEC298D
3. Disconnect park/neutral position relay-3 harness connector.

SEC185D
4. Check harness continuity between TCM terminal 48 and park/neutral position relay-3 terminal 2. Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.

OK or NG
OK c GO TO 6.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

EC-393
 DTC P1706 PNP
SWITCH TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
6 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Check harness continuity between park/neutral position relay-3 terminal 1, 6 and ground.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to power.
OK or NG
OK c GO TO 7.
NG c Repair open circuit or short to power in harness or connectors.

7 CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 80 and park/neutral position relay-3 terminal 7.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 9.
NG c GO TO 8.

8 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors F7, M52
+ Harness connectors M21, E127
+ Harness for open between ECM and park/neutral position relay-3
c Repair open circuit or short to ground or short to power in harness or connectors.

9 CHECK PARK/NEUTRAL POSITION RELAY-3

Refer to AT section.
OK or NG
OK c
NG c

10 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-394
 DTC P1805 BRAKE
SWITCH TB48DE A/T (WITH EURO-OBD)

Description
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW + Ignition switch: ON Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON

On Board Diagnosis Logic

The MI will not light up for this self-diagnosis.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805 Brake switch A brake switch signal is not sent to ECM + Harness or connectors
1805 for an extremely long time while the (Stop lamp switch circuit is open or
vehicle is driving. shorted.)
+ Stop lamp switch

FALI-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operating condition in fail-safe mode
ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.
Therefore, acceleration will be poor.
Vehicle condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration

DTC Confirmation Procedure

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-II.
4. Select “DATA MONITOR” mode with CONSULT-II.
5. If 1st trip DTC is detected, go to EC-397, “Diagnostic Proce-
dure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-395
DTC P1805 BRAKE
SWITCH TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC249M

EC-396
 DTC P1805 BRAKE
SWITCH TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Approximately 0V
Brake pedal fully released
106 G/Y Stop lamp switch
Engine is running. BATTERY VOLTAGE
Brake pedal depressed (11 - 14V)

Diagnostic Procedure
1 CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch “OFF”.
2. Check the stop lamp when depressing and releasing the brake pedal.

MTBL1593
OK or NG
OK c GO TO 4.
NG c GO TO 2.

EC-397
 DTC P1805 BRAKE
SWITCH TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch harness connector.

SEC194D
2. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.

PBIB0117E
Voltage: Battery voltage
OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
+ 10A fuse
+ Fuse block (J/B) connector M3
+ Harness for open and short between stop lamp switch and battery
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-398
 DTC P1805 BRAKE
SWITCH TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
4 CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Disconnect stop lamp switch harness connector.

SEC194D
4. Check harness continuity between ECM terminal 106 and stop lamp switch terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors M52, F7
+ Harness for open or short between ECM and stop lamp switch
c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK STOP LAMP SWITCH

Refer to EC-399, “Component Inspection”.
OK or NG
OK c GO TO 7.
NG c Replace stop lamp switch.

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
STOP LAMP SWITCH
1. Disconnect stop lamp switch harness connector.

SEC194D

EC-399
 DTC P1805 BRAKE
SWITCH TB48DE A/T (WITH EURO-OBD)
Component Inspection (Cont’d)
2. Check continuity between stop lamp switch terminals 1 and
2 under the following conditions.
Conditions Continuity
Brake pedal fully released Should not exist.
Brake pedal depressed Should exist.

If NG, adjust brake pedal installation, refer to BR section, and

perform step 2 again.

PBIB0118E

EC-400
 DTC P2122, P2123 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
The accelerator pedal position sensor is installed on the upper
end of the accelerator pedal assembly. The sensor detects the
accelerator position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sen-
sors are a kind of potentiometers which transform the accelera-
tor pedal position into output voltage, and emit the voltage sig-
nal to the ECM. In addition, these sensors detect the opening
and closing speed of the accelerator pedal and feed the voltage
signals to the ECM. The ECM judges the current opening angle
PBIB0146E
of the accelerator pedal from these signals and controls the
throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor.
The ECM uses this signal for the engine operation such as fuel
cut.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1 + Ignition switch: ON Accelerator pedal: Fully released More than 0.36V
ACCEL SEN2* (engine stopped)
+ Shift lever position is “D” Accelerator pedal: Fully depressed Less than 4.75V

CLSD THL POS + Ignition switch: ON Accelerator pedal: Fully released ON

(engine stopped)
+ Shift lever position is “D” Accelerator pedal: Slightly depressed OFF

*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

These self-diagnoses have the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2122 Accelerator pedal position An excessively low voltage from the APP + Harness or connectors
2122 sensor 1 circuit low input sensor 1 is sent to ECM. (The APP sensor 1 circuit is open or
shorted.)
P2123 Accelerator pedal position An excessively high voltage from the APP + Accelerator pedal position sensor
2123 sensor 1 circuit high input sensor 1 is sent to ECM. (Accelerator pedal position sensor 1)

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operating condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

EC-401
 DTC P2122, P2123 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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
battery voltage is more than 10V at idle.

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-405, “Diagnostic Procedure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-402
DTC P2122, P2123 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC401M

EC-403
 DTC P2122, P2123 APP
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal position Accelerator pedal fully released
87 W
sensor 1 Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully depressed

Sensor ground Engine is running.

89 B (Accelerator pedal posi- Approximately 0V
Warm-up condition.
tion sensor 1) Idle speed

Sensor power supply

94 LG (Accelerator pedal posi- Ignition switch “ON” Approximately 2.5V
tion sensor 2)

Sensor ground
100 R (Accelerator pedal posi- Ignition switch “ON” Approximately 0V
tion sensor 2)

Sensor power supply

103 Y (Accelerator pedal posi- Ignition switch “ON” Approximately 5V
tion sensor 1)

Ignition switch “ON”

Engine stopped More than 0.18V

Shift lever position is “D”
Accelerator pedal position Accelerator pedal fully released
117 G
sensor 2 Ignition switch “ON”

Engine stopped Less than 2.37V

Shift lever position is “D”
Accelerator pedal fully depressed

EC-404
 DTC P2122, P2123 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

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

SEC690C

c GO TO 2.

2 CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

1. Disconnect accelerator pedal position (APP) sensor harness connector.

SEC182D
2. Turn ignition switch “ON”.
3. Check voltage between APP sensor terminal 7 and ground with CONSULT-II or tester.

SEC673D
Voltage: Approximately 5V
OK or NG
OK c GO TO 4.
NG c GO TO 3.

EC-405
 DTC P2122, P2123 APP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 DETECT MALFUNCTIONING PART
Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 9 and ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK APP SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 87 and APP sensor terminal 8.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 8.
NG c GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK APP SENSOR

Refer to EC-407, “Component Inspection”.
OK or NG
OK c GO TO 10.
NG c GO TO 9.

9 REPLACE APP SENSOR

1. Replace the accelerator pedal position sensor.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

EC-406
 DTC P2122, P2123 APP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
10 CHECK INTERMITTENT INCIDENT
Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch “ON”.
3. Check voltage between ECM terminals 87 (APP sensor 1
signal), 117 (APP sensor 2 signal) and engine ground under
the following conditions.
Terminal Accelerator pedal Voltage
87 Fully released More than 0.36V
PBIB0184E
(Accelerator pedal posi-
tion sensor 1) Fully depressed Less than 4.75V
117 Fully released More than 0.18V
(Accelerator pedal posi-
tion sensor 2) Fully depressed Less than 2.37V

4. If NG, replace accelerator pedal assembly and go to the next

step.
5. Perform EC-31, “Accelerator Pedal Released Position Learn-
ing”.
6. Perform EC-31, “Throttle Valve Closed Position Learning”.
7. Perform EC-31, “Idle Air Volume Learning”.

EC-407
 DTC P2127, P2128 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
The accelerator pedal position sensor is installed on the upper
end of the accelerator pedal assembly. The sensor detects the
accelerator position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sen-
sors are a kind of potentiometers which transform the accelera-
tor pedal position into output voltage, and emit the voltage sig-
nal to the ECM. In addition, these sensors detect the opening
and closing speed of the accelerator pedal and feed the voltage
signals to the ECM. The ECM judges the current opening angle
PBIB0146E
of the accelerator pedal from these signals and controls the
throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor.
The ECM uses this signal for the engine operation such as fuel
cut.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1 + Ignition switch: ON Accelerator pedal: Fully released More than 0.36
ACCEL SEN2* (engine stopped)
+ Shift lever position is “D” Accelerator pedal: Fully depressed Less than 4.75V

CLSD THL POS + Ignition switch: ON Accelerator pedal: Fully released ON

(engine stopped)
+ Shift lever position is “D” Accelerator pedal: Slightly depressed OFF

*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

These self-diagnoses have the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2127 Accelerator pedal position An excessively low voltage from the APP + Harness or connectors
2127 sensor 2 circuit low input sensor 2 is sent to ECM. (The APP sensor 2 circuit is open or
shorted.)
P2128 Accelerator pedal position An excessively high voltage from the APP + Accelerator pedal position sensor
2128 sensor 2 circuit high input sensor 2 is sent to ECM. (Accelerator pedal position sensor 2)

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operating condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

EC-408
 DTC P2127, P2128 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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
battery voltage is more than 10V at idle.

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-411, “Diagnostic Procedure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-409
DTC P2127, P2128 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC402M

EC-410
 DTC P2127, P2128 APP
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.
Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal position Accelerator pedal fully released
87 W
sensor 1 Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully depressed
Engine is running.
89 B Sensors’ ground Approximately 0V
Warm-up condition.
Idle speed
Sensor power supply
94 LG (Accelerator pedal posi- Ignition switch “ON” Approximately 2.5V
tion sensor 2)
Sensor ground
100 R (Accelerator pedal posi- Ignition switch “ON” Approximately 0V
tion sensor 2)
103 Y Sensors’ power supply Ignition switch “ON” Approximately 5V
Ignition switch “ON”

Engine stopped More than 0.18V

Shift lever position is “D”
Accelerator pedal position Accelerator pedal fully released
117 G
sensor 2 Ignition switch “ON”

Engine stopped Less than 2.37V

Shift lever position is “D”
Accelerator pedal fully depressed

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

SEC690C

c GO TO 2.

EC-411
 DTC P2127, P2128 APP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.

SEC182D
2. Turn ignition switch “ON”.
3. Check voltage between APP sensor terminal 10 and ground with CONSULT-II or tester.

SEC674D
Voltage: Approximately 2.5V
OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 12 and ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

EC-412
 DTC P2127, P2128 APP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 DETECT MALFUNCTIONING PART
Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 117 and APP sensor terminal 11.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 8.
NG c GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK APP SENSOR

Refer to EC-414, “Component Inspection”.
OK or NG
OK c GO TO 10.
NG c GO TO 9.

9 REPLACE APP SENSOR

1. Replace the accelerator pedal position sensor.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

10 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-413
 DTC P2127, P2128 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch “ON”.
3. Check voltage between ECM terminals 87 (APP sensor 1
signal), 117 (APP sensor 2 signal) and engine ground under
the following conditions.
Terminal Accelerator pedal Voltage

PBIB0184E
87 Fully released More than 0.36V
(Accelerator pedal posi-
tion sensor 1) Fully depressed Less than 4.75V

117 Fully released More than 0.18V

(Accelerator pedal posi-
tion sensor 2) Fully depressed Less than 2.37V

4. If NG, replace accelerator pedal assembly and go to the next

step.
5. Perform EC-31, “Accelerator Pedal Released Position Learn-
ing”.
6. Perform EC-31, “Throttle Valve Closed Position Learning”.
7. Perform EC-31, “Idle Air Volume Learning”.

EC-414
 DTC P2135 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
Electric Throttle Control Actuator consists of throttle control
motor, throttle position sensor, etc. The throttle position sensor
responds to the throttle valve movement.
The throttle position sensor has the two sensors. These sensors
are a kind of potentiometers which transform the throttle valve
position into output voltage, and emit the voltage signal to the
ECM. In addition, these sensors detect the opening and closing
speed of the throttle valve and feed the voltage signals to the
ECM. The ECM judges the current opening angle of the throttle
PBIB0145E
valve from these signals and the ECM controls the throttle con-
trol motor to make the throttle valve opening angle properly in
response to driving condition.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
THRTL SEN1 + Ignition switch: ON Accelerator pedal: Fully released More than 0.5V
THRTL SEN2* (Engine stopped)
+ Shift lever: D Accelerator pedal: Fully depressed Less than 1.5V

*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2135 Throttle position sensor Rationally incorrect voltage is sent to ECM + Harness or connector
2135 circuit range/performance compared with the signals from TP sensor (The TP sensor 1 and 2 circuit is open
problem 1 and TP sensor 2. or shorted.)
+ Electric throttle control actuator
(TP sensor 1 and 2)

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operation condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

EC-415
 DTC P2135 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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
battery voltage is more than 10V at idle.

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-418, “Diagnostic Procedure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-416
DTC P2135 TP
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC400M

EC-417
 DTC P2135 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Sensor ground
89 B Approximately 0V
(Throttle position sensor) Warm-up condition.
Idle speed

Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully released
98 R/L Throttle position sensor 2
Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal fully depressed

Sensor power supply

103 Y Ignition switch “ON” Approximately 5V
(Throttle position sensor)

Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal fully released
108 L Throttle position sensor 1
Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully depressed

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

SEC690C

c GO TO 2.

EC-418
 DTC P2135 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect electric throttle control actuator harness connector.

SEC182D
2. Turn ignition switch “ON”.
3. Check voltage between electric throttle control actuator terminal 1 and ground with CONSULT-II or tester.

PBIB0082E
Voltage: Approximately 5V
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

3 CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 5 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 4.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 108 and electric throttle control actuator terminal 4, ECM terminal 98 and elec-
tric throttle control actuator terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 5.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

EC-419
 DTC P2135 TP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK THROTTLE POSITION SENSOR
Refer to EC-420, “Component Inspection”.
OK or NG
OK c GO TO 7.
NG c GO TO 6.

6 REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace the electric throttle control actuator.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

7 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform EC-31, “Throttle Valve Closed Position Learning”.
3. Turn ignition switch “ON”.
4. Set selector lever to “D” position.
5. Check voltage between ECM terminals 108 (TP sensor 1
signal), 98 (TP sensor 2 signal) and engine ground under the
following conditions.
PBIB0179E
Terminal Accelerator pedal Voltage
108 Fully released More than 0.36V
(Throttle position sensor
1) Fully depressed Less than 4.75V

98 Fully released Less than 4.75V

(Throttle position sensor
2) Fully depressed More than 0.36V

6. If NG, replace electric throttle control actuator and go to the

next step.
7. Perform EC-31, “Accelerator Pedal Released Position Learn-
ing”.
8. Perform EC-31, “Throttle Valve Closed Position Learning”.
9. Perform EC-31, “Idle Air Volume Learning”.

EC-420
 DTC P2138 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
The accelerator pedal position sensor is installed on the upper
end of the accelerator pedal assembly. The sensor detects the
accelerator position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sen-
sors are a kind of potentiometers which transform the accelera-
tor pedal position into output voltage, and emit the voltage sig-
nal to the ECM. In addition, these sensors detect the opening
and closing speed of the accelerator pedal and feed the voltage
signals to the ECM. The ECM judges the current opening angle
PBIB0146E
of the accelerator pedal from these signals and controls the
throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor.
The ECM uses this signal for the engine operation such as fuel
cut.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1 + Ignition switch: ON Accelerator pedal: Fully released More than 0.36V
ACCEL SEN2* (engine stopped)
+ Shift lever position is “D” Accelerator pedal: Fully depressed Less than 4.75V

CLSD THL POS + Ignition switch: ON Accelerator pedal: Fully released ON

(engine stopped)
+ Shift lever position is “D” Accelerator pedal: Slightly depressed OFF

*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2138 Accelerator pedal position Rationally incorrect voltage is sent to ECM + Harness or connector
2138 sensor circuit range/ compared with the signals from APP sen- (The APP sensor 1 and 2 circuit is open
performance problem sor 1 and APP sensor 2. or shorted.)
+ Accelerator pedal position sensor 1 and
2

FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operating condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

EC-421
 DTC P2138 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

DTC Confirmation Procedure

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
battery voltage is more than 10V at idle.

WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-425, “Diagnostic Procedure”.

SEF058Y

WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-422
DTC P2138 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC403M

EC-423
 DTC P2138 APP
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Ignition switch “ON”

Engine stopped More than 0.36V

Shift lever position is “D”
Accelerator pedal position Accelerator pedal fully released
87 W
sensor 1 Ignition switch “ON”

Engine stopped Less than 4.75V

Shift lever position is “D”
Accelerator pedal fully depressed

Sensor ground Engine is running.

89 B (Accelerator pedal posi- Approximately 0V
Warm-up condition.
tion sensor 1) Idle speed

Sensor power supply

94 LG (Accelerator pedal posi- Ignition switch “ON” Approximately 2.5V
tion sensor 2)

Sensor ground
100 R (Accelerator pedal posi- Ignition switch “ON” Approximately 0V
tion sensor 2)

Sensor power supply

103 Y (Accelerator pedal posi- Ignition switch “ON” Approximately 5V
tion sensor 1)

Ignition switch “ON”

Engine stopped More than 0.18V

Shift lever position is “D”
Accelerator pedal position Accelerator pedal fully released
117 G
sensor 2 Ignition switch “ON”

Engine stopped Less than 2.37V

Shift lever position is “D”
Accelerator pedal fully depressed

EC-424
 DTC P2138 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

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

SEC690C

c GO TO 2.

2 CHECK APP SENSOR POWER SUPPLY CIRCUIT

1. Disconnect accelerator pedal position (APP) sensor harness connector.

SEC182D
2. Turn ignition switch “ON”.
3. Check voltage between APP sensor terminals 7, 10 and ground with CONSULT-II or tester.

PBIB0084E
Voltage: Approximately 5V
OK or NG
OK c GO TO 4.
NG c GO TO 3.

EC-425
 DTC P2138 APP
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 DETECT MALFUNCTIONING PART
Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminals 9, 12 and ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 87 and APP sensor terminal 8, ECM terminal 117 and APP sensor terminal
11.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 8.
NG c GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
+ Harness for open or short between ECM and accelerator pedal position sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK APP SENSOR

Refer to EC-427, “Component Inspection”.
OK or NG
OK c GO TO 10.
NG c GO TO 9.

9 REPLACE APP SENSOR

1. Replace the accelerator pedal position sensor.
2. Perform EC-31, “Accelerator Pedal Released Position Learning”.
3. Perform EC-31, “Throttle Valve Closed Position Learning”.
4. Perform EC-31, “Idle Air Volume Learning”.
c INSPECTION END

EC-426
 DTC P2138 APP
SENSOR TB48DE A/T (WITH EURO-OBD)

10 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.

Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch “ON”.
3. Check voltage between ECM terminals 87 (APP sensor 1
signal), 117 (APP sensor 2 signal) and engine ground under
the following conditions.
Terminal Accelerator pedal Voltage

PBIB0184E
87 Fully released More than 0.36V
(Accelerator pedal posi-
tion sensor 1) Fully depressed Less than 4.75V

117 Fully released More than 0.18V

(Accelerator pedal posi-
tion sensor 2) Fully depressed Less than 2.37V

4. If NG, replace accelerator pedal assembly and go to the next

step.
5. Perform EC-31, “Accelerator Pedal Released Position Learn-
ing”.
6. Perform EC-31, “Throttle Valve Closed Position Learning”.
7. Perform EC-31, “Idle Air Volume Learning”.

EC-427
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)

Component Description
IGNITION COIL & POWER TRANSISTOR
The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns on and off the igni-
tion coil primary circuit. This on-off operation induces the proper
high voltage in the coil secondary circuit.

SEC781C

EC-428
IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC415M

EC-429
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.

Ignition switch “OFF” 0 - 1.0V

ECM relay For a few seconds after turning ignition switch

42 B/Y “OFF”
(Self shut-off)
Ignition switch “OFF”
BATTERY VOLTAGE
More than a few seconds passed after turning (11 - 14V)
ignition switch “OFF”

163 B/R BATTERY VOLTAGE

Power supply for ECM Ignition switch “OFF”
166 B/R (11 - 14V)

EC-430
IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)

TEC416M

EC-431
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

0 - 0.1V★

Engine is running.

Warm-up condition.
Idle speed

18 Y/R Ignition signal No. 1 PBIB0521E

19 G Ignition signal No. 2
20 Y Ignition signal No. 3 0 - 0.2V★

Engine is running.

Warm-up condition.
Engine speed is 2,000 rpm

PBIB0522E

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

EC-432
IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)

TEC417M

EC-433
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

0 - 0.1V★

Engine is running.

Warm-up condition.
Idle speed

21 R/B Ignition signal No. 4 PBIB0521E

29 R/G Ignition signal No. 5
30 R Ignition signal No. 6 0 - 0.2V★

Engine is running.

Warm-up condition.
Engine speed is 2,000 rpm

PBIB0522E

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

EC-434
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 CHECK ENGINE START
Turn ignition switch “OFF”, and restart engine.
Is engine running?
Yes or No
Yes (With CONSULT-II) c GO TO 2.
Yes (Without CONSULT-II) c GO TO 3.
No c GO TO 4.

2 CHECK OVERALL FUNCTION

With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
2. Make sure that each circuit produces a momentary engine speed drop.

PBIB0133E
OK or NG
OK c INSPECTION END
NG c GO TO 13.

EC-435
 IGNITION SIGNAL TB48DE A/T (WITH 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 18, 19, 20, 21, 29, 30 and ground with an oscilloscope.

SEC828C
3. Verify that the oscilloscope screen shows the signal wave as shown below.

PBIB0521E
OK or NG
OK c INSPECTION END
NG c GO TO 13.

4 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminals 163, 166 and ground with CONSULT-II or tester.

PBIB0135E
Voltage: Battery voltage
OK or NG
OK c GO TO 5.
NG c Go to EC-113, “POWER SUPPLY CIRCUIT FOR ECM”.

EC-436
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Turn ignition switch “OFF”.
2. Disconnect condenser harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between condenser terminal 1 and ground with CONSULT-II or tester.

PBIB0624E
Voltage: Battery voltage
OK or NG
OK c GO TO 11.
NG c GO TO 6.

6 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III

1. Turn ignition switch “OFF”.
2. Disconnect ECM relay.

SEC668D
3. Check harness continuity between ECM relay terminal 3 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 c GO TO 8.
NG c GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors M55, F35
+ Harness for open or short between ECM relay and condenser
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-437
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
8 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV
Check voltage between ECM relay terminal 5 and ground with CONSULT-II or tester.

SEC741D
Voltage: Battery voltage
OK or NG
OK c GO TO 10.
NG c GO TO 9.

9 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ 15A fuse
+ Harness for open or short between ECM relay and battery
c Repair or replace harness or connectors.

10 CHECK ECM RELAY

Refer to EC-112, “Component Inspection”.
OK or NG
OK c GO TO 20.
NG c Replace ECM relay.

11 CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect condenser harness connector.
3. Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK c GO TO 12.
NG c Repair open circuit or short to power in harness or connector.

12 CHECK CONDENSER
Refer to EC-441, “Component Inspection”.
OK or NG
OK c GO TO 13.
NG c Replace condenser.

EC-438
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
13 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
1. Turn ignition switch “OFF”.
2. Reconnect all harness connectors disconnected.
3. Disconnect ignition coil harness connector.

SEC783C

SEC784C
4. Turn ignition switch “ON”.
5. Check voltage between ignition coil terminal 1 and ground with CONSULT-II or tester.

SEF107S
Voltage: Battery voltage
OK or NG
OK c GO TO 15.
NG c GO TO 14.

14 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors F25, F121
+ Harness for open or short between ignition coil and ECM relay
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-439
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
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 c GO TO 17.
NG c GO TO 16.

16 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors F25, F121
+ Harness for open or short between ignition coil and ground
c Repair open circuit or short to power in harness or connectors.

17 CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 18, 19, 20, 21, 29, 30 and ignition coil terminal 3.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 19.
NG c GO TO 18.

18 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors F25, F121
+ Harness for open or short between ECM and ignition coil
c Repair open circuit or short to ground or short to power in harness or connectors.

19 CHECK IGNITION COIL WITH POWER TRANSISTOR

Refer to EC-441, “Component Inspection”.
OK or NG
OK c GO TO 20.
NG c Replace ignition coil with power transistor.

20 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-440
 IGNITION SIGNAL TB48DE A/T (WITH EURO-OBD)

Component Inspection
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.
Condition Continuity
12V direct current supply between
Yes
terminals 1 and 2
PBIB0077E OFF No

3. If NG, replace ECM relay.

CONDENSER
1. Turn ignition switch “OFF”.
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminals 1 and 2.
Resistance: Above 1 MΩ at 25°C (77°F)

MBIB0031E

IGNITION COIL WITH POWER TRANSISTOR

1. Turn ignition switch “OFF”.
2. Disconnect ignition coil harness connector.
3. Check resistance between ignition coil terminals as follows.
Terminal No. Resistance Ω [at 25°C (77°F)]
3 and 1 Except 0 or
3 and 2
Except 0
1 and 2

MBIB0032E

EC-441
 SNOW MODE SWITCH TB48DE A/T (WITH EURO-OBD)

Component Description
To turn on the switch, push the lower side of it. The indicator light
of the switch will illuminate and the transmission shifts into the
snow driving mode.
+ This mode is used for standing starts on slippery (snowy,
sandy) roads.
+ When the selector lever is in the D position, the transmission
shifts from 1st to 5th gear automatically from standing starts
or when accelerating from low speed.
SEC222D

ECM Terminals and Reference Value

Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE DATA
MINAL ITEM CONDITION
COLOR (DC voltage)
NO.
Ignition switch “ON”
Battery voltage (11 - 14V)
Snow mode switch is snow position.
60 Y/G Snow mode switch Snow switch is “ON”.
Ignition switch “ON”
Approximately 0V
Except above switch position

EC-442
SNOW MODE SWITCH TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC332M

EC-443
 SNOW MODE SWITCH TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
INSPECTION START

.
CHECK OVERALL FUNCTION. OK CHECK SNOW INDICA-
c
1. Turn ignition switch “ON”. TOR LAMP.
2. Check voltage as follows. 1. Turn ignition switch
“ON”.
Snow mode switch ECM terminal V
60 voltage 2. Check snow indicator
AUTO 0V lamp as follows.

SEC188D SNOW 11 - 14 V (Battery voltage) Snow mode Snow indica-

switch tor lamp
NG AUTO OFF
NG SNOW ON
Ab
V
OK
.
INSPECTION END

.
CHECK POWER SUPPLY FOR SNOW NG Check the following.
c
MODE SWITCH. + 7.5A fuse
1. Turn ignition switch “OFF”. + Harness connectors
2. Disconnect snow mode switch harness M20 , B19
connector. + Harness for open or
3. Turn ignition switch “ON”. short between snow
4. Check voltage between snow mode mode switch and fuse.
switch terminal V2 and ground. If NG, repair open circuit,
Battery voltage short to ground or short to
power in harness or con-
OK nectors.
.
CHECK INPUT SIGNAL CIRCUIT-I. NG Check the following.
c
1. Turn ignition switch “OFF”. + Harness connector B19 ,
2. Disconnect ECM harness connector. M20
3. Check harness continuity between snow + Harness connector M52 ,
mode switch terminal V 1 and ECM ter- F7
minal V60 . + Harness for open or
Refer to Wiring Diagram. short between snow
Continuity should exist. mode switch and ECM
4. Check harness continuity between ECM If NG, repair open circuit,
terminal V60 and snow mode switch ter- short to ground or short to
minal V 6 . Refer to wiring diagram. power in harness or con-
Continuity should exist. nectors.
5. Also check harness for short to ground
and short to power.
If OK, reconnect ECM harness connector.
OK
.
CHECK GROUND CIRCUIT. NG Check the following.
c
1. Check harness continuity between snow + Harness connector B19 ,
mode switch harness connector terminal M20
V7 and ground. + Harness for open or
Refer to Wiring Diagram. short between snow
Continuity should exist. mode switch and ground.
If OK, check harness for short to power. If NG, repair open circuit,
short to power in harness
OK or connectors.
.
CHECK INTERMITTENT INCIDENT.
Refer to “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-112.

.
INSPECTION END

EC-444
SNOW MODE SWITCH TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
A
V
.
CHECK SNOW INDICATOR LAMP NG Repair open circuit, short
c
INPUT SIGNAL CIRCUIT. to ground or short to
1. Check continuity between snow mode power in harness or con-
switch terminal V
1 and V 6 . Refer to nectors.
wiring diagram.
Continuity should exist.
2. Also check harness for short to ground
and short to power.

OK
.
CHECK SNOW INDICATOR LAMP NG Check the following.
c
GROUND. + Harness connectors
1. Check harness continuity between B19 , M20
snow mode switch terminal V 7 and + Harness for open or
ground. Refer to wiring diagram. short between snow
Continuity should exist. mode switch and ground
If NG, repair open circuit,
OK
short to power in harness
or connectors.

.
CHECK SNOW INDICATOR LAMP. NG Replace snow indicator
c
Refer to EL or AT section. lamp or snow mode switch
assembly.
OK
.
INSPECTION END

EC-445
 VARIABLE INDUCTION AIR CONTROL
SYSTEM (VIAS) TB48DE A/T (WITH EURO-OBD)

Description
SYSTEM DESCRIPTION

ECM func-
Sensor Input Signal to ECM Actuator
tion
Mass air flow sensor Amount of intake air
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position VIAS con-
VIAS control solenoid valve
Ignition switch Start signal trol

Camshaft position sensor Engine speed

Engine coolant temperature sensor Engine coolant temperature

SEC802C

When the engine is running at low or medium speed, the ECM

sends the signal to the VIAS control solenoid valve then power
valve is fully closed. Under this condition, the effective suction
port length is equivalent to the total length of the intake manifold
collector’s suction port including the intake valve. This long suc-
tion port 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 running at high speed, the ECM does not send the signal to
the VIAS control solenoid valve, thus enabling power valve to be
fully opened. This signal introduces the intake manifold 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

EC-446
 VARIABLE INDUCTION AIR CONTROL
SYSTEM (VIAS) TB48DE A/T (WITH EURO-OBD)
Description (Cont’d)
length of the suction port provided independently for each cylin-
der. This shortened port length results in enhanced engine out-
put with reduced suction resistance under high speeds.

COMPONENT DESCRIPTION
Power valve
The power valve is installed in intake manifold collector and used
to control the suction passage of the variable induction air con-
trol 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 control solenoid valve.

SEC803C

VIAS control solenoid valve

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 for high speed. When the ECM sends an
ON signal the coil pulls the plunger downward and feeds the
vacuum signal to the power valve actuator.

SEC804C

ECM Terminals and Reference Value

Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.
Engine is running. BATTERY VOLTAGE
Idle speed (11 - 14V)
VIAS control solenoid
27 LG/R
valve Engine is running.
0 - 1.0V
Engine speed is above 5,000 rpm.

EC-447
VARIABLE INDUCTION AIR CONTROL
SYSTEM (VIAS) TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC161M

EC-448
VARIABLE INDUCTION AIR CONTROL
SYSTEM (VIAS) TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
INSPECTION START

.
CHECK OVERALL FUNCTION. OK INSPECTION END
c
With CONSULT-II
1. Start engine and warm it up to normal
operating temperature.
2. Perform “VIAS SOL VALVE” in “ACTIVE
SEC805C TEST” mode with CONSULT-II.
3. Turn VIAS control solenoid valve “ON”
and “OFF”, and make sure that power
valve actuator rod moves.
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.
NG
.
CHECK VIAS CONTROL SOLENOID NG Check the following.
c
SEC806C VALVE POWER SUPPLY CIRCUIT. + Harness connectors
1. Stop engine. M52 , F7
2. Disconnect VIAS control solenoid valve + 10A fuse
harness connector. + Harness continuity
3. Turn ignition switch “ON”. between fuse and VIAS
4. Check voltage between terminal V 1 and control solenoid valve
ground with CONSULT-II or tester. If NG, repair harness or
Voltage: Battery voltage connectors.
OK
.
CHECK VIAS CONTROL SOLENOID NG Repair open circuit or short
c
VALVE OUTPUT SIGNAL CIRCUIT FOR to ground or short to power
OPEN AND SHORT. in harness or connectors.
1. Turn ignition switch “OFF”.
SEC804C 2. Disconnect ECM harness connector.
3. Check harness continuity between ECM
terminal V
27 and terminal V 2 . Refer to
Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground
and short to power.
OK
.
RETEST OVERALL FUNCTION. OK INSPECTION END
c
1. Reconnect harness connectors discon-
nected.
2. Perform CHECK OVERALL FUNCTION
again.
SEC807C
NG
.
CHECK INTERMITTENT INCIDENT. NG Repair or replace harness
c
Refer to “TROUBLE DIAGNOSIS FOR or connectors.
INTERMITTENT INCIDENT”, EC-112.
OK
.
Replace VIAS control solenoid valve as
intake manifold collector assembly.

EC-449
 START SIGNAL TB48DE A/T (WITH EURO-OBD)

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
START SIGNAL + Ignition switch: ON → START → ON OFF → ON → OFF

ECM Terminals and Reference Value

Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.
Ignition switch “ON” Approximately 0V
59 R/W Start signal
Ignition switch “START” 9 - 12V

EC-450
START SIGNAL TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC163M

EC-451
 START SIGNAL TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
INSPECTION START

.
CHECK OVERALL FUNCTION. OK INSPECTION END
c
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “START SIGNAL” in “DATA
PBIB0182E MONITOR” mode with CONSULT-II.

IGN “ON” OFF

IGN “START” ON

------------------------------------------------------------------ OR ------------------------------------------------------------------

Without CONSULT-II
1. Turn ignition switch to “START”.
2. Check voltage between ECM terminal
59 and ground.
V
Voltage:
Ignition switch “START”
Battery voltage (9 - 12V)
SEC824C Except above
Approximately 0V
NG
.
Check if 7.5A fuse is OK. NG Replace 7.5A fuse.
c
OK
.
CHECK INPUT SIGNAL CIRCUIT. NG Check the following.
c
1. Turn ignition switch “OFF”. + Harness connectors
2. Disconnect ECM harness connector and M52 , F7
7.5A fuse. + Harness for open or
3. Check harness continuity between ECM short between ECM and
terminal V59 and fuse block. fuse block
Refer to Wiring Diagram. If NG, repair open circuit,
Continuity should exist. short to ground or short to
If OK, check harness for short to ground power in harness or con-
and short to power. nectors.
OK
.
CHECK INTERMITTENT INCIDENT.
Refer to “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-112.

.
INSPECTION END

EC-452
 INJECTOR CIRCUIT TB48DE A/T (WITH EURO-OBD)

Component Description
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 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. Pulse duration is the length of time the injector
remains open. The ECM controls the injection pulse duration
based on engine fuel needs.
SEF375Z

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
B/FUEL SCHDL + Engine: After warming up Idle 5.0 - 5.5 msec
+ Shift lever: N
+ Air conditioner switch: OFF 2,000 rpm 5.0 - 5.5 msec
+ No-load
INJ PULSE-B1 + Engine: After warming up Idle 3.0 - 4.0 msec
INJ PULSE-B2 + Shift lever: N
+ Air conditioner switch: OFF 2,000 rpm 3.0 - 4.0 msec
+ No-load

EC-453
INJECTOR CIRCUIT TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC162M

EC-454
 INJECTOR CIRCUIT TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

BATTERY VOLTAGE
(11 - 14V)★

Engine is running.

Warm-up condition.
Idle speed
5 BR/W Injector No. 1
6 GY/L Injector No. 2
7 BR/Y Injector No. 3 PBIB0529E

13 GY/R Injector No. 4 BATTERY VOLTAGE

14 BR Injector No. 5 (11 - 14V)★
15 GY Injector No. 6
Engine is running.

Warm-up condition.
Engine speed is 2,000 rpm

PBIB0530E

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

Diagnostic Procedure
1 INSPECTION START
Turn ignition switch to “START”.
Is any cylinder ignited?
Yes or No
Yes c GO TO 2.
No c GO TO 3.

EC-455
 INJECTOR CIRCUIT TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.

PBIB0133E
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.

MEC703B
Clicking noise should be heard.
OK or NG
OK c INSPECTION END
NG c GO TO 3.

EC-456
 INJECTOR CIRCUIT TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
3 CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect injector harness connector.

SEC793C
3. Turn ignition switch “ON”.
4. Check voltage between injector terminal 2 and ground with CONSULT-II or tester.

PBIB0289E
Voltage: Battery voltage
OK or NG
OK c GO TO 5.
NG c GO TO 4.

4 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors F12, F101
+ Harness connectors M52, F7
+ Fuse block (J/B) connector M2
+ 10A fuse
+ Harness for open or short between injector and fuse
c Repair open circuit or short to ground or short to power in harness or connectors.

5 CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 1 and ECM terminals 5, 6, 7, 13, 14, 15.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 7.
NG c GO TO 6.

EC-457
 INJECTOR CIRCUIT TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
6 DETECT MALFUNCTIONING PART
Check the following.
+ Harness connectors F101, F12
+ Harness for open or short between ECM and injector
c Repair open circuit or short to ground or short to power in harness or connectors.

7 CHECK INJECTOR
Refer to EC-458, “Component Inspection”.
OK or NG
OK c GO TO 8.
NG c Replace injector.

8 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

Component Inspection
INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
Resistance: 13.5 - 17.5Ω [at 20°C (68°F)]

SEC809C

EC-458
 FUEL PUMP TB48DE A/T (WITH EURO-OBD)

System Description
Camshaft position sensor Engine speed
c Fuel
ECM c pump
Ignition switch Start signal relay
c

The ECM activates the fuel pump for several sec-

Condition Fuel pump operation
onds after the ignition switch is turned on to
improve engine storability. If the ECM receives a Operates for
Ignition switch is turned to ON.
120° signal from the camshaft position sensor, it 5 seconds.
knows that the engine is rotating, and causes the Engine running and cranking Operates.
pump to operate. If the 120° signal is not received When engine is stopped Stops in 1 second.
when the ignition switch is on, the engine stalls.
The ECM stops pump operation and prevents bat- Except as shown above Stops.
tery discharging, thereby improving safety. The
ECM does not directly drive the fuel pump. It con-
trols the ON/OFF fuel pump relay, which in turn
controls the fuel pump.

Component Description
The fuel pump with a fuel damper is an in-tank type (the pump
and damper are located in the fuel tank).

SEF609V

CONSULT-II Reference Value in Data Monitor

Mode
Remarks: Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION

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

+ Engine running and cranking ON
FUEL PUMP RLY + When engine is stopped (Stops in 1 second)

Except as shown above OFF

EC-459
 FUEL PUMP TB48DE A/T (WITH EURO-OBD)

ECM Terminals and Reference Value

Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE DATA
MINAL ITEM CONDITION
COLOR (DC voltage)
NO.

Ignition switch “ON”

For 5 seconds after turning ignition switch 0 - 1.0V

“ON”
41 R/Y Fuel pump relay Engine is running.

Ignition switch “ON” BATTERY VOLTAGE

5 seconds after turning ignition switch “ON” (11 - 14V)

EC-460
 FUEL PUMP TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC164M

EC-461
 FUEL PUMP TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
INSPECTION START

.
CHECK OVERALL FUNCTION. OK INSPECTION END
c
1. Turn ignition switch “ON”.
2. Pinch fuel feed hose with fingers.
Fuel pressure pulsation should be
felt on the fuel feed hose for 5 sec-
SEC810C
onds after ignition switch is turned
“ON”.
NG
.
CHECK POWER SUPPLY. NG Check the following.
c
1. Turn ignition switch “OFF”. + 15A fuse
2. Disconnect fuel pump relay. + Harness for open or
3. Turn ignition switch “ON”. short between fuse and
1 ,
4. Check voltage between terminals V fuel pump relay
V3 and ground with CONSULT-II or If NG, repair harness or
tester. connectors.
Voltage: Battery voltage

SEC684CA OK
.
CHECK GROUND CIRCUIT-I. NG Check the following.
c
1. Turn ignition switch “OFF”. + Harness connectors
2. Disconnect fuel tank gauge unit (fuel C2 , B37
pump) harness connector. + Harness for open or
3. Check harness continuity between ter- short between fuel pump
minal V6 and body ground. and body ground
Refer to Wiring Diagram. If NG, repair open circuit,
Continuity should exist. short to power in harness
If OK, check harness for short to or connectors.
power.

SEF479P
OK
.
CHECK GROUND CIRCUIT-II. NG Check the following.
c
1. Turn ignition switch “OFF”. + Harness connectors
2. Check harness continuity between relay M20 , B19
terminal V5 and fuel pump terminal V
4 . + Harness connectors
Refer to Wiring Diagram. B137 , C2
Continuity should exist. + Harness for open or
If OK, check harness for short to short between fuel pump
ground and short to power. and fuel pump relay
If NG, repair open circuit,
OK short to ground or short to
power in harness or con-
SEF608V nectors.
.
A
V
(Go to next page.)

EC-462
 FUEL PUMP TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
A
V

.
CHECK OUTPUT SIGNAL CIRCUIT. NG Check the following.
c
1. Disconnect ECM harness connector. + Harness connectors
2. Check harness continuity between ECM M52 , F7
41 and fuel pump relay termi-
terminal V + Harness for open or
nal V2 . short between ECM and
Refer to Wiring Diagram. fuel pump relay
Continuity should exist. If NG, repair open circuit,
If OK, check harness for short to short to ground or short to
SEF073Y
ground and short to power. power in harness or con-
nectors.
OK
.
CHECK COMPONENT NG Replace fuel pump relay.
c
(Fuel pump relay).

With CONSULT-II
1. Reconnect fuel pump relay, 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.
------------------------------------------------------------------ OR ------------------------------------------------------------------

Without CONSULT-II
Refer to “COMPONENT INSPECTION”,
EC-464.
OK
.
CHECK COMPONENT NG Replace fuel pump.
c
(Fuel pump).
Refer to “COMPONENT INSPECTION”,
EC-464.
OK
.
CHECK INTERMITTENT INCIDENT.
Refer to “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-112.

.
INSPECTION END

EC-463
 FUEL PUMP TB48DE A/T (WITH EURO-OBD)

Component Inspection
FUEL PUMP RELAY
Check continuity between terminals V
3 and V
5 .
Conditions Continuity
12V direct current supply
Yes
between terminals V 1 and V
2

No current supply No

If NG, replace relay.

SEF511P

FUEL PUMP
1. Disconnect fuel pump harness connector.
2. Check resistance between terminals V 4 and V
6 .
Resistance: 0.2 - 5.0Ω at 25°C (77°F)
If NG, replace fuel pump.

SEF607V

EC-464
 REFRIGERANT PRESSURE
SENSOR TB48DE A/T (WITH EURO-OBD)

Component Description
The refrigerant pressure sensor is installed at the liquid tank of
the air conditioner system. The sensor uses an electrostatic vol-
ume pressure transducer to convert refrigerant pressure to volt-
age. The voltage signal is sent to ECM, and ECM controls cool-
ing fan system.

SEC742D

SEF099X

EC-465
REFRIGERANT PRESSURE
SENSOR TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC341M

EC-466
 REFRIGERANT PRESSURE
SENSOR TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)
Specification data are reference values and are measured between each terminal and 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.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.

Engine is running.
Refrigerant pressure sen-
88 R/G Warm-up condition. 1.0 - 4.0V
sor Both A/C switch and blower switch are “ON”.
(Compressor operates.)

Sensor ground Engine is running.

89 B (Refrigerant pressure sen- Approximately 0V
Warm-up condition.
sor) Idle speed

103 Y Sensors’ power supply Ignition switch “ON” Approximately 5V

Diagnostic Procedure
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 88 and ground with CONSULT-II or tester.

PBIB0187E
Voltage: 1.0 - 4.0V
OK or NG
OK c INSPECTION END
NG c GO TO 2.

EC-467
 REFRIGERANT PRESSURE
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
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.

SEC742D
4. Turn ignition switch “ON”.
5. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.

PBIB0085E
Voltage: Approximately 5V
OK or NG
OK c GO TO 4.
NG c GO TO 3.

3 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Harness for open or short between ECM and refrigerant pressure sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

4 CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 3 and ground.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

EC-468
 REFRIGERANT PRESSURE
SENSOR TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
5 DETECT MALFUNCTIONING PART
Check the following.
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Harness for open or short between ECM and refrigerant pressure sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

6 CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN ANDSHORT
1. Check harness continuity between ECM terminal 88 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 8.
NG c GO TO 7.

7 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness connectors M51, F6
+ Harness for open or short between ECM and refrigerant pressure sensor
c Repair open circuit or short to ground or short to power in harness or connectors.

8 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
OK or NG
OK c Replace refrigerant pressure sensor.
NG c Repair or replace.

EC-469
 ELECTRICAL LOAD
SIGNAL TB48DE A/T (WITH EURO-OBD)

Description
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
through the CAN communication line from combination meter to ECM.

CONSULT-II Reference Value in Data Monitor

Mode
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
LOAD SIGNAL + Ignition switch: ON Rear window defogger switch is ON ON
and/or lighting switch is 2nd.
Rear window defogger switch is OFF OFF
and lighting switch is OFF.

EC-470
ELECTRICAL LOAD
SIGNAL TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC426M

EC-471
ELECTRICAL LOAD
SIGNAL TB48DE A/T (WITH EURO-OBD)
Wiring Diagram (Cont’d)

TEC371M

EC-472
 ELECTRICAL LOAD
SIGNAL TB48DE A/T (WITH EURO-OBD)

Diagnostic Procedure
1 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
With CONSULT-II

With GST
1. Turn ignition switch “ON”.
2. Connect CONSULT-II or GST and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following conditions.

PBIB0103E

MTBL1594
OK or NG
OK (With CONSULT-II) c GO TO 2.
OK (Without CONSULT-II) c GO TO 3.
NG c GO TO 4.

EC-473
 ELECTRICAL LOAD
SIGNAL TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
2 CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
With CONSULT-II
Check “LOAD SIGNAL” indication under the following conditions.

PBIB0103E

MTBL1595
OK or NG
OK c INSPECTION END
NG c GO TO 5.

3 CHECK REAR WINDOW DEFOGGER FUNCTION

1. Start engine.
2. Turn “ON” the rear window defogger switch.
3. Check the rear windshield. Is the rear windshield heated up?
Yes or No
Yes c GO TO 4.
No c Check rear window defogger circuit. Refer to xx.

4 CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect rear window defogger relay.
3. Disconnect combination meter harness connector.
4. Check harness continuity between rear window defogger relay terminal 5 and combination meter terminal 27.
Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness for open or short between rear window defogger relay and combination meter
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-474
 ELECTRICAL LOAD
SIGNAL TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
6 CHECK COMBINATION METER
Refer to EL section.
OK or NG
OK c GO TO 10.
NG c Replace combination meter.

7 CHECK HEADLAMP FUNCTION

1. Start engine.
2. Lighting switch “ON” at 2nd position.
3. Check that headlamp high beams are illuminated.
OK or NG
OK c GO TO 8.
NG c Check headlamp circuit. Refer to EL section.

8 CHECK HEADLAMP INPUT SIGNAL CIRCUIT

1. Stop engine.
2. Disconnect combination meter harness connector.
3. Disconnect combination switch harness connector.
4. Check harness continuity between combination switch terminals 6, 7 and combination meter terminal 26.

SEC761D

MTBL1596
5. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 10.
NG c GO TO 9.

9 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Diode E108
+ Harness for open or short between combination switch and combination meter
c Repair open circuit or short to ground or short to power.

EC-475
 ELECTRICAL LOAD
SIGNAL TB48DE A/T (WITH EURO-OBD)
Diagnostic Procedure (Cont’d)
10 CHECK COMBINATION METER
Refer to EL section.
OK or NG
OK c GO TO 11.
NG c Replace combination meter.

11 CHECK INTERMITTENT INCIDENT

Refer to EC-112, “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

EC-476
 DATA LINK
CONNECTORS TB48DE A/T (WITH EURO-OBD)

Wiring Diagram

TEC423M

EC-477
 EVAPORATIVE EMISSION
SYSTEM TB48DE A/T (WITH EURO-OBD)

Description
SYSTEM DESCRIPTION

PBIB0491E

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 operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is
proportionally regulated as the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating
and idling.

EC-478
 EVAPORATIVE EMISSION
SYSTEM TB48DE A/T (WITH EURO-OBD)
Description (Cont’d)
EVAPORATIVE EMISSION LINE DRAWING

SEC665D

EC-479
 EVAPORATIVE EMISSION
SYSTEM TB48DE A/T (WITH EURO-OBD)

Component Inspection
EVAP CANISTER
Check EVAP canister as follows:
1. Block port C. Orally blow air through port A.
Check that air flows freely through port B.
2. Block port A. Orally blow air through port C.
Check that air flows freely through port B.

SEF917W

FUEL CHECK VALVE

1. Blow air through connector on fuel tank side.
A considerable resistance should be felt and a portion of air
flow should be directed toward the EVAP canister side.
2. Blow air through connector on EVAP canister side.
Air flow should be smoothly directed toward fuel tank side.
3. If fuel check valve is suspected of not properly functioning in
steps 1 and 2 above, replace it.

SEF631V

FUEL TANK VACUUM RELIEF VALVE (BUILT INTO

FUEL FILLER CAP)
1. Wipe clean valve housing.

SEF989X

2. Check valve opening pressure and vacuum.

Pressure:
16.0 - 20.0 kPa (0.16 - 0.200 bar, 0.163 - 0.204
kg/cm2, 2.32 - 2.90 psi)
Vacuum:
−6.0 to −3.5 kPa (−0.060 to −0.035 bar, −0.061 to
−0.036 kg/cm2, −0.87 to −0.51 psi)
3. If out of specification, replace fuel filler cap as an assembly.

SEF943S

EVAP CANISTER PURGE VOLUME CONTROL

SOLENOID VALVE
Refer to EC-275, “Component Inspection”.

EC-480
 POSITIVE CRANKCASE
VENTILATION TB48DE A/T (WITH EURO-OBD)

Description
SYSTEM DESCRIPTION

PBIB0492E

This system returns blow-by gas to the intake manifold.

The positive crankcase ventilation (PCV) valve is provided to
conduct 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 crankcase. In this process the air
passes through the hose connecting air inlet tubes to rocker
cover. Under full-throttle condition, the manifold vacuum is insuf-
ficient 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 con-
ditions.

SEC481D

EC-481
 POSITIVE CRANKCASE
VENTILATION TB48DE A/T (WITH EURO-OBD)

Component Inspection
PCV (POSITIVE CRANKCASE VENTILATION) VALVE
With engine running at idle, remove PCV valve from rocker
cover. A properly working valve makes a hissing noise as air
passes through it. A strong vacuum should be felt immediately
when a finger is placed over valve inlet.

SEC137A

PCV VALVE VENTILATION HOSE

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
 SERVICE DATA AND SPECIFICATIONS
(SDS) TB48DE A/T (WITH EURO-OBD)

Fuel Pressure Regulator

Fuel pressure
kPa (bar, kg/cm2, psi)

Approximately
At idle
245 (2.45, 2.5, 36)
A few seconds after ignition Approximately
switch is turned OFF to ON 294 (2.94, 3.0, 43)

Idle Speed and Ignition Timing

Idle speed rpm

No-load*1 Target idle speed 675±50

(in “N” position)

Air conditioner: ON
750 rpm or more
(in “N” position)

Ignition timing 10°±5° BTDC

*1: Under the following conditions:
+ Air conditioner switch: OFF
+ Steering wheel: Kept in straight-ahead position
+ Electrical load: OFF (Lights, heater fan & rear window defog-
ger)

Mass Air Flow Sensor

Supply voltage V Battery voltage (11 - 14)

0.75 - 1.5 at idle*

Output voltage at idle V
1.7 - 2.4 at 2,500 rpm*
*: Engine is warmed up to normal operating temperature and running
under no-load.

Engine Coolant Temperature Sensor

Temperature °C (°F) Resistance

20 (68) 2.1 - 2.9 kΩ

50 (122) 0.68 - 1.00 kΩ

90 (194) 0.236 - 0.260 kΩ

Heated Oxygen Sensor 1

Resistance [at 25°C (77°F)] 3.3 - 4.0Ω

Heated Oxygen Sensor 2

Resistance [at 25°C (77°F)] 5.0 - 7.0Ω

Fuel Pump
Resistance [at 25°C (77°F)] Ω 0.2 - 5.0

EC-483
 SERVICE DATA AND SPECIFICATIONS
(SDS) TB48DE A/T (WITH EURO-OBD)

EVAP Canister Purge Volume Control

Solenoid Valve
Resistance [at 20°C (68°F)] Ω 31 - 35

Injector
Resistance [at 20°C (77°F)] Ω 14.0 - 15.0

Ignition Coil with Power Transistor

Terminal No. (Polarity) Resistance Ω [at 25°C (77°F)]

3 (+) - 2 (−) Except 0 or

1 (+) - 3 (−)
Except 0
1 (+) - 2 (−)

Condenser
Resistance [at 25°C (77°F)] MΩ Above 1

Throttle Control Motor

Resistance [at 25°C (77°F)] Approximately 1 - 15 Ω

EC-484
ENGINE AND EMISSION CONTROL OVERALL SYSTEM ZD30DDTi

Circuit Diagram

TEC395M

EC-485
TROUBLE DIAGNOSIS FOR POWER SUPPLY ZD30DDTi

Main Power Supply and Ground Circuit

TEC352M

EC-486
DTC 0102 MASS AIR FLOW SEN ZD30DDTi

Wiring Diagram

TEC353M

EC-487
DTC 0104 VEHICLE SPEED SEN ZD30DDTi

Wiring Diagram

TEC354M

EC-488
DTC 0208 OVER HEAT ZD30DDTi

Wiring Diagram

TEC355M

EC-489
 DTC 0208 OVER HEAT ZD30DDTi

Diagnostic Procedure
1 INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes c GO TO 2.
No c GO TO 3.

2 CHECK COOLING FAN OPERATION

With CONSULT-II
1. Turn ignition switch “ON”.
2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-II.

SEF646X

3. Make sure that cooling fan-1 operates.

OK or NG
OK c GO TO 12.
NG c GO TO 4.

3 CHECK COOLING FAN OPERATION

Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Disconnect engine coolant temperature sensor harness connector.
3. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
4. Restart engine and make sure that cooling fan operates.

MEC475B
OK or NG
OK c GO TO 12.
NG c GO TO 4.

EC-490
 DTC 0208 OVER HEAT ZD30DDTi
Diagnostic Procedure (Cont’d)
4 CHECK COOLING FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect cooling fan relay-1.

SEF690V

3. Turn ignition switch “ON”.

4. Check voltage between cooling fan relay-1 terminals 1, 3, 6 and ground with CONSULT-II or tester.

SEC533D
OK or NG
OK c GO TO 6.
NG c GO TO 5.

5 DETECT MALFUNCTIONING PART

Check the following.
+ Fuse block (J/B) connector E112
+ 10A fuse or 20A fuse
+ 40A fusible links
+ Harness for open or short between cooling fan relay-1 and fuse
+ Harness for open or short between cooling fan relay-1 and battery
c Repair open circuit or short to ground or short to power in harness or connectors.

EC-491
 DTC 0208 OVER HEAT ZD30DDTi
Diagnostic Procedure (Cont’d)
6 CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect cooling fan motor-1 harness connector.

SEF691V

3. Check harness continuity between cooling fan relay-1 terminal 5 and cooling fan motor-1 terminal 1, cooling fan relay-1 terminal
7 and cooling fan motor-1 terminal 3, cooling fan motor-1 terminals 2, 4 and body ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK c GO TO 7.
NG c Repair open circuit or short to ground or short to power in harness or connectors.

7 CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 14 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 c GO TO 9.
NG c GO TO 8.

8 DETECT MALFUNCTIONING PART

Check the following.
+ Harness connectors E127, M21
+ Harness connectors M52, F7
+ Harness for open or short between cooling fan relay-1 and ECM
c Repair open circuit or short to ground or short to power in harness or connectors.

9 CHECK COOLING FAN RELAY-1

Refer to “Component Inspection”, EC-495.
OK or NG
OK c GO TO 10.
NG c Replace cooling fan relay.

EC-492
 DTC 0208 OVER HEAT ZD30DDTi
Diagnostic Procedure (Cont’d)
10 CHECK COOLING FAN MOTOR-1
Supply battery voltage between the following terminals and check operation.

SEF645V

MTBL1304
OK or NG
OK c GO TO 11.
NG c Replace cooling fan motor.

11 CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”.
c INSPECTION END

12 CHECK COOLING SYSTEM FOR LEAK

Apply pressure to the cooling system with a tester, and check if the pressure drops.
Testing pressure: 98 kPa (0.98 bar, 1.0 kg/cm2, 14 psi)
CAUTION:
Higher than the specified pressure may cause radiator damage.

SLC754A

Pressure should not drop.

OK or NG
OK c GO TO 14.
NG c GO TO 13.

EC-493
 DTC 0208 OVER HEAT ZD30DDTi
Diagnostic Procedure (Cont’d)
13 DETECT MALFUNCTIONING PART
Check the following for leak.
+ Hose
+ Radiator
+ Water pump (Refer to LC section, “Water Pump”.)
c Repair or replace.

14 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 c GO TO 15.
NG c Replace radiator cap.

15 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] (Models for cold areas)
76.5°C (170°F) [standard] (Models for except cold areas)
Valve lift:
More than 10 mm/95°C (0.394 in/203°F)
4. Check if valve is closed at 5°C (9°F) below valve opening temperature. For details, refer to LC section, “Thermostat”.
OK or NG
OK c GO TO 16.
NG c Replace thermostat.

EC-494
 DTC 0208 OVER HEAT ZD30DDTi
Diagnostic Procedure (Cont’d)

16 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 c GO TO 17.
NG c Replace engine coolant temperature sensor.

17 CHECK MAIN 12 CAUSES

If the cause cannot be isolated, go to “MAIN 12 CAUSES OF OVERHEATING”, EC-496.
c INSPECTION END

Component Inspection
COOLING FAN RELAY-1
Check continuity between terminals V
3 and V
5 ,V
6 and V
7 .
Conditions Continuity
12V direct current supply between
Yes
terminals 1 and 2
No current supply No

If NG, replace relay.

SEC202B

EC-495
 DTC 0208 OVER HEAT ZD30DDTi

Main 12 Causes of Overheating

Engine Step Inspection item Equipment Standard Reference page
OFF 1 + Blocked radiator + Visual No blocking —
+ Blocked condenser
+ Blocked radiator grille
+ Blocked bumper
2 + Coolant mixture + Coolant tester 30 - 50% coolant mixture See “RECOMMENDED
FLUIDS AND LUBRI-
CANTS” in MA section.
3 + Coolant level + Visual Coolant up to MAX level See “Changing Engine
in reservoir tank and Coolant”, “ENGINE MAIN-
radiator filler neck TENANCE” in MA sec-
tion.
4 + Radiator cap + Pressure tester 59 - 98 kPa (0.59 - 0.98 See “System Check”,
bar, 0.6 - 1.0 kg/cm2, “ENGINE COOLING SYS-
9 - 14 psi) (Limit) TEM” in LC section.
ON*2 5 + Coolant leaks + Visual No leaks See “System Check”,
“ENGINE COOLING SYS-
TEM” in LC section.
ON*2 6 + Thermostat + Touch the upper and Both hoses should be hot. See “Thermostat” and
lower radiator hoses “Radiator”, “ENGINE
COOLING SYSTEM” in
LC section.
ON*1 7 + Cooling fan + Visual Operating See “DTC 0208 OVER
HEAT”.
OFF 8 + Combustion gas leak + Color checker chemical Negative —
tester 4 gas analyzer
ON*3 9 + Coolant temperature + Visual Gauge less than 3/4 —
gauge when driving
+ Coolant overflow to res- + Visual No overflow during driving See “Changing Engine
ervoir tank and idling Coolant”, “ENGINE MAIN-
TENANCE” in MA sec-
tion.
OFF*4 10 + Coolant return from res- + Visual Should be initial level in See “ENGINE MAINTE-
ervoir tank to radiator reservoir tank NANCE” in MA section.
OFF 11 + Cylinder head + Straight gauge feeler 0.1 mm (0.004 in) Maxi- See “Inspection”, “CYLIN-
gauge mum distortion (warping) DER HEAD” in EM sec-
tion.
12 + Cylinder block and pis- + Visual No scuffing on cylinder See “Inspection”, “CYLIN-
tons walls or piston DER BLOCK” in EM sec-
tion.
*1: Engine running at idle.
*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 “OVERHEATING CAUSE ANALYSIS” in LC section.

EC-496
DTC 0402 P9zFUEL TEMP SEN ZD30DDTi

Wiring Diagram

TEC356M

EC-497
DTC 0403 ACCEL POS SENSOR ZD30DDTi

Wiring Diagram

TEC357M

EC-498
DTC 0902 ECM RLY ZD30DDTi

Wiring Diagram

TEC358M

EC-499
DTC 1003 EGR VOLUME CONT/V ZD30DDTi

Wiring Diagram

TEC359M

EC-500
MI (MIL) & DATA LINK CONNECTORS ZD30DDTi

Wiring Diagram

TEC396M

EC-501