ENGINE

ENGINE CONTROL SYSTEM

SECTION EC EC

E
CONTENTS
VQ35DE THROTTLE VALVE CLOSED POSITION F
LEARNING : Description .........................................17
BASIC INSPECTION .................................... 8 THROTTLE VALVE CLOSED POSITION
LEARNING : Special Repair Requirement ..............17 G
DIAGNOSIS AND REPAIR WORKFLOW .......... 8
Work Flow ................................................................. 8 IDLE AIR VOLUME LEARNING ................................17
Diagnostic Work Sheet ............................................ 11 IDLE AIR VOLUME LEARNING : Description .........17
IDLE AIR VOLUME LEARNING : Special Repair H
INSPECTION AND ADJUSTMENT ....................12 Requirement ............................................................17
BASIC INSPECTION ................................................. 12 MIXTURE RATIO SELF-LEARNING VALUE
BASIC INSPECTION : Special Repair Require- I
CLEAR .......................................................................19
ment ........................................................................ 12 MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Description ................................................19
ADDITIONAL SERVICE WHEN REPLACING J
MIXTURE RATIO SELF-LEARNING VALUE
CONTROL UNIT ........................................................ 15
CLEAR : Special Repair Requirement .....................19
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description ................................ 15 FUNCTION DIAGNOSIS .............................. 20
ADDITIONAL SERVICE WHEN REPLACING K
CONTROL UNIT : Special Repair Requirement .... 15 ENGINE CONTROL SYSTEM .......................... 20
System Diagram .....................................................20
IDLE SPEED .............................................................. 15 L
System Description ..................................................21
IDLE SPEED : Description ...................................... 15
Component Parts Location ....................................21
IDLE SPEED : Special Repair Requirement ........... 15
Component Description ...........................................26
IGNITION TIMING ...................................................... 16 M
MULTIPORT FUEL INJECTION SYSTEM ....... 28
IGNITION TIMING : Description .............................. 16
System Diagram .....................................................28
IGNITION TIMING : Special Repair Requirement.... 16
System Description ..................................................28
Component Parts Location ....................................31 N
VIN REGISTRATION ................................................. 16
VIN REGISTRATION : Description ......................... 16 Component Description ...........................................36
VIN REGISTRATION : Special Repair Require-
ment ........................................................................ 16
ELECTRIC IGNITION SYSTEM ........................ 37 O
System Diagram .....................................................37
ACCELERATOR PEDAL RELEASED POSITION System Description ..................................................37
LEARNING ................................................................ 17 Component Parts Location ....................................38
Component Description ...........................................43 P
ACCELERATOR PEDAL RELEASED POSITION
LEARNING : Description ......................................... 17
ACCELERATOR PEDAL RELEASED POSITION AIR CONDITIONING CUT CONTROL .............. 44
LEARNING : Special Repair Requirement .............. 17 System Diagram ......................................................44
System Description ..................................................44
THROTTLE VALVE CLOSED POSITION LEARN- Component Parts Location ....................................45
ING ............................................................................. 17 Component Description ...........................................50

Revision: 2008 October EC-1 2009 Murano

AUTOMATIC SPEED CONTROL DEVICE U0164 CAN COMM CIRCUIT ........................... 139
(ASCD) ............................................................... 51 Description ............................................................ 139
System Diagram ..................................................... 51 DTC Logic ............................................................. 139
System Description ................................................. 51 Diagnosis Procedure ............................................. 139
Component Parts Location ................................... 53
Component Description ......................................... 58 U1000, U1001 CAN COMM CIRCUIT .............. 140
Description ............................................................ 140
CAN COMMUNICATION ................................... 59 DTC Logic ............................................................. 140
System Description ................................................. 59 Diagnosis Procedure ............................................. 140

COOLING FAN CONTROL ............................... 60 P0011, P0021 IVT CONTROL .......................... 141
System Diagram ..................................................... 60 DTC Logic ............................................................. 141
System Description ................................................. 60 Diagnosis Procedure ............................................. 142
Component Parts Location ................................... 62 Component Inspection .......................................... 143
Component Description .......................................... 67
P0031, P0032, P0051, P0052 A/F SENSOR 1
ELECTRONIC CONTROLLED ENGINE HEATER ........................................................... 145
MOUNT .............................................................. 68 Description ............................................................ 145
System Diagram ..................................................... 68 DTC Logic ............................................................. 145
System Description ................................................. 68 Diagnosis Procedure ............................................. 145
Component Parts Location ................................... 71 Component Inspection .......................................... 147
Component Description ......................................... 76
P0037, P0038, P0057, P0058 HO2S2 HEAT-
EVAPORATIVE EMISSION SYSTEM ............... 77 ER ..................................................................... 148
System Diagram ..................................................... 77 Description ............................................................ 148
System Description ................................................. 77 DTC Logic ............................................................. 148
Component Parts Location ................................... 81 Diagnosis Procedure ............................................. 149
Component Description ......................................... 86 Component Inspection .......................................... 150

INTAKE VALVE TIMING CONTROL ................. 87 P0075, P0081 IVT CONTROL SOLENOID
System Diagram ..................................................... 87 VALVE .............................................................. 151
System Description ................................................. 87 Description ............................................................ 151
Component Parts Location ................................... 88 DTC Logic ............................................................. 151
Component Description .......................................... 93 Diagnosis Procedure ............................................. 151
Component Inspection .......................................... 152
VARIABLE INDUCTION AIR SYSTEM ............. 94
System Diagram ..................................................... 94 P0101 MAF SENSOR ....................................... 154
System Description ................................................. 94 Description ............................................................ 154
Component Parts Location ................................... 96 DTC Logic ............................................................. 154
Component Description ........................................101 Component Function Check ................................. 157
Diagnosis Procedure ............................................. 157
ON BOARD DIAGNOSTIC (OBD) SYSTEM ... 102 Component Inspection .......................................... 159
Diagnosis Description ............................................102
CONSULT-III Function ..........................................115 P0102, P0103 MAF SENSOR .......................... 162
Diagnosis Tool Function ......................................124 Description ............................................................ 162
DTC Logic ............................................................. 162
COMPONENT DIAGNOSIS ....................... 127 Diagnosis Procedure ............................................. 163
Component Inspection .......................................... 164
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE ............................................................. 127 P0112, P0113 IAT SENSOR ............................ 167
Description .............................................................127 Description ............................................................ 167
Component Function Check ..................................127 DTC Logic ............................................................. 167
Diagnosis Procedure .............................................128 Diagnosis Procedure ............................................. 168
Component Inspection .......................................... 168
POWER SUPPLY AND GROUND CIRCUIT ... 135
Diagnosis Procedure .............................................135 P0116 ECT SENSOR ....................................... 170
Description ............................................................ 170
U0101 CAN COMM CIRCUIT .......................... 138 DTC Logic ............................................................. 170
Description .............................................................138 Diagnosis Procedure ............................................. 171
DTC Logic ..............................................................138 Component Inspection .......................................... 171
Diagnosis Procedure .............................................138

Revision: 2008 October EC-2 2009 Murano

P0117, P0118 ECT SENSOR ........................... 172 Component Function Check .................................. 212
Description ............................................................ 172 Diagnosis Procedure ............................................. 213 A
DTC Logic ............................................................. 172 Component Inspection ........................................... 216
Diagnosis Procedure ............................................. 173
Component Inspection .......................................... 173 P0139, P0159 HO2S2 ..................................... 219
Description ............................................................. 219 EC
P0122, P0123 TP SENSOR ............................. 175 DTC Logic .............................................................. 219
Description ............................................................ 175 Component Function Check .................................. 220
DTC Logic ............................................................. 175 Diagnosis Procedure ............................................. 221 C
Diagnosis Procedure ............................................. 175 Component Inspection ........................................... 223
Component Inspection .......................................... 177
Special Repair Requirement ................................. 177 P0171, P0174 FUEL INJECTION SYSTEM
D
FUNCTION ...................................................... 226
P0125 ECT SENSOR ....................................... 178 DTC Logic .............................................................. 226
Description ............................................................ 178 Diagnosis Procedure ............................................. 228
DTC Logic ............................................................. 178 E
Diagnosis Procedure ............................................. 179 P0172, P0175 FUEL INJECTION SYSTEM
Component Inspection .......................................... 179 FUNCTION ...................................................... 231
DTC Logic .............................................................. 231 F
P0127 IAT SENSOR ......................................... 181 Diagnosis Procedure ............................................. 233
Description ............................................................ 181
DTC Logic ............................................................. 181 P0181 FTT SENSOR ....................................... 236
Diagnosis Procedure ............................................. 182 Description ............................................................. 236 G
Component Inspection .......................................... 182 DTC Logic .............................................................. 236
Diagnosis Procedure ............................................. 237
P0128 THERMOSTAT FUNCTION .................. 183 Component Inspection ........................................... 238 H
DTC Logic ............................................................. 183
Diagnosis Procedure ............................................. 184 P0182, P0183 FTT SENSOR .......................... 239
Component Inspection .......................................... 185 Description ............................................................. 239
DTC Logic .............................................................. 239 I
P0130, P0150 A/F SENSOR 1 ......................... 186 Diagnosis Procedure ............................................. 239
Description ............................................................ 186 Component Inspection ........................................... 240
DTC Logic ............................................................. 186 J
Component Function Check .................................. 188 P0196 EOT SENSOR ...................................... 242
Diagnosis Procedure ............................................. 188 Description ............................................................. 242
DTC Logic .............................................................. 242
P0131, P0151 A/F SENSOR 1 ......................... 190 K
Diagnosis Procedure ............................................. 243
Description ............................................................ 190 Component Inspection ........................................... 244
DTC Logic ............................................................. 190
Diagnosis Procedure ............................................. 191 P0197, P0198 EOT SENSOR ......................... 245 L
Description ............................................................. 245
P0132, P0152 A/F SENSOR 1 ......................... 194 DTC Logic .............................................................. 245
Description ............................................................ 194 Diagnosis Procedure ............................................. 246 M
DTC Logic ............................................................. 194 Component Inspection ........................................... 246
Diagnosis Procedure ............................................. 195
P0222, P0223 TP SENSOR ............................ 248
P0133, P0153 A/F SENSOR 1 ......................... 198 Description ............................................................. 248 N
Description ............................................................ 198 DTC Logic .............................................................. 248
DTC Logic ............................................................. 198 Diagnosis Procedure ............................................. 248
Diagnosis Procedure ............................................. 200 Component Inspection ........................................... 250 O
Special Repair Requirement .................................. 250
P0137, P0157 HO2S2 ...................................... 203
Description ............................................................ 203 P0300, P0301, P0302, P0303, P0304, P0305,
DTC Logic ............................................................. 203 P0306 MISFIRE ............................................... 251 P
Component Function Check .................................. 204 DTC Logic .............................................................. 251
Diagnosis Procedure ............................................. 205 Diagnosis Procedure ............................................. 252
Component Inspection .......................................... 207
P0327, P0328, P0332, P0333 KS ................... 257
P0138, P0158 HO2S2 ...................................... 210 Description ............................................................. 257
Description ............................................................ 210 DTC Logic .............................................................. 257
DTC Logic ............................................................. 210 Diagnosis Procedure ............................................. 257

Revision: 2008 October EC-3 2009 Murano

 Component Inspection ...........................................258 DTC Logic ............................................................. 300
Diagnosis Procedure ............................................. 300
P0335 CKP SENSOR (POS) ........................... 260 Component Inspection .......................................... 302
Description .............................................................260
DTC Logic ..............................................................260 P0452 EVAP CONTROL SYSTEM PRES-
Diagnosis Procedure .............................................261 SURE SENSOR ................................................ 303
Component Inspection ...........................................263 Description ............................................................ 303
DTC Logic ............................................................. 303
P0340, P0345 CMP SENSOR (PHASE) .......... 264 Diagnosis Procedure ............................................. 304
Description .............................................................264 Component Inspection .......................................... 306
DTC Logic ..............................................................264
Diagnosis Procedure .............................................265 P0453 EVAP CONTROL SYSTEM PRES-
Component Inspection ...........................................266 SURE SENSOR ................................................ 308
Description ............................................................ 308
P0420, P0430 THREE WAY CATALYST DTC Logic ............................................................. 308
FUNCTION ....................................................... 268 Diagnosis Procedure ............................................. 309
DTC Logic ..............................................................268 Component Inspection .......................................... 312
Component Function Check ..................................269
Diagnosis Procedure .............................................270 P0455 EVAP CONTROL SYSTEM .................. 314
DTC Logic ............................................................. 314
P0441 EVAP CONTROL SYSTEM .................. 273 Diagnosis Procedure ............................................. 316
DTC Logic ..............................................................273 Component Inspection .......................................... 318
Component Function Check ..................................274
Diagnosis Procedure .............................................275 P0456 EVAP CONTROL SYSTEM .................. 320
DTC Logic ............................................................. 320
P0442 EVAP CONTROL SYSTEM .................. 278 Component Function Check ................................. 322
DTC Logic ..............................................................278 Diagnosis Procedure ............................................. 322
Diagnosis Procedure .............................................279 Component Inspection .......................................... 326
Component Inspection ...........................................283
P0460 FUEL LEVEL SENSOR ......................... 327
P0443 EVAP CANISTER PURGE VOLUME Description ............................................................ 327
CONTROL SOLENOID VALVE ....................... 284 DTC Logic ............................................................. 327
Description .............................................................284 Diagnosis Procedure ............................................. 327
DTC Logic ..............................................................284
Diagnosis Procedure .............................................285 P0461 FUEL LEVEL SENSOR ......................... 329
Component Inspection ...........................................287 Description ............................................................ 329
DTC Logic ............................................................. 329
P0444, P0445 EVAP CANISTER PURGE Component Function Check ................................. 329
VOLUME CONTROL SOLENOID VALVE ...... 289 Diagnosis Procedure ............................................. 330
Description .............................................................289
DTC Logic ..............................................................289 P0462, P0463 FUEL LEVEL SENSOR ............ 331
Diagnosis Procedure .............................................289 Description ............................................................ 331
Component Inspection ...........................................291 DTC Logic ............................................................. 331
Diagnosis Procedure ............................................. 331
P0447 EVAP CANISTER VENT CONTROL
VALVE ............................................................. 292 P0500 VSS ........................................................ 333
Description .............................................................292 Description ............................................................ 333
DTC Logic ..............................................................292 DTC Logic ............................................................. 333
Diagnosis Procedure .............................................292 Component Function Check ................................. 334
Component Inspection ...........................................294 Diagnosis Procedure ............................................. 334

P0448 EVAP CANISTER VENT CONTROL P0506 ISC SYSTEM ......................................... 335
VALVE ............................................................. 296 Description ............................................................ 335
Description .............................................................296 DTC Logic ............................................................. 335
DTC Logic ..............................................................296 Diagnosis Procedure ............................................. 335
Diagnosis Procedure .............................................297
P0507 ISC SYSTEM ......................................... 337
Component Inspection ...........................................298
Description ............................................................ 337
P0451 EVAP CONTROL SYSTEM PRES- DTC Logic ............................................................. 337
SURE SENSOR ............................................... 300 Diagnosis Procedure ............................................. 337
Description .............................................................300

Revision: 2008 October EC-4 2009 Murano

P0550 PSP SENSOR ....................................... 339 Description ............................................................. 365
Description ............................................................ 339 DTC Logic .............................................................. 365 A
DTC Logic ............................................................. 339 Diagnosis Procedure ............................................. 365
Diagnosis Procedure ............................................. 339 Component Inspection ........................................... 366
Component Inspection .......................................... 340 EC
P1551, P1552 BATTERY CURRENT SEN-
P0603 ECM POWER SUPPLY ......................... 342 SOR ................................................................. 368
Description ............................................................ 342 Description ............................................................. 368
DTC Logic ............................................................. 342 DTC Logic .............................................................. 368 C
Diagnosis Procedure ............................................. 342 Diagnosis Procedure ............................................. 368
Component Inspection ........................................... 369
P0605 ECM ....................................................... 344 D
Description ............................................................ 344 P1553 BATTERY CURRENT SENSOR .......... 371
DTC Logic ............................................................. 344 Description ............................................................. 371
Diagnosis Procedure ............................................. 345 DTC Logic .............................................................. 371
Diagnosis Procedure ............................................. 371 E
P0607 ECM ....................................................... 346 Component Inspection ........................................... 372
Description ............................................................ 346
DTC Logic ............................................................. 346 P1554 BATTERY CURRENT SENSOR .......... 374 F
Diagnosis Procedure ............................................. 346 Description ............................................................. 374
DTC Logic .............................................................. 374
P0643 SENSOR POWER SUPPLY ................. 347 Component Function Check .................................. 374
DTC Logic ............................................................. 347 Diagnosis Procedure ............................................. 375 G
Diagnosis Procedure ............................................. 347 Component Inspection ........................................... 376
P0850 PNP SWITCH ........................................ 350 P1564 ASCD STEERING SWITCH ................. 377 H
Description ............................................................ 350 Description ............................................................. 377
DTC Logic ............................................................. 350 DTC Logic .............................................................. 377
Component Function Check .................................. 351 Diagnosis Procedure ............................................. 377
Diagnosis Procedure ............................................. 351 I
Component Inspection ........................................... 379
P1148, P1168 CLOSED LOOP CONTROL ..... 353 P1572 ASCD BRAKE SWITCH ...................... 380
DTC Logic ............................................................. 353 Description ............................................................. 380 J
DTC Logic .............................................................. 380
P1212 TCS COMMUNICATION LINE .............. 354
Diagnosis Procedure ............................................. 381
Description ............................................................ 354
Component Inspection (ASCD Brake Switch) ....... 384 K
DTC Logic ............................................................. 354
Component Inspection (Stop Lamp Switch) .......... 384
Diagnosis Procedure ............................................. 354
P1574 ASCD VEHICLE SPEED SENSOR ..... 386
P1217 ENGINE OVER TEMPERATURE ......... 355 L
Description ............................................................. 386
DTC Logic ............................................................. 355
DTC Logic .............................................................. 386
Component Function Check .................................. 355
Diagnosis Procedure ............................................. 386
Diagnosis Procedure ............................................. 356
M
P1700 CVT CONTROL SYSTEM .................... 388
P1225 TP SENSOR .......................................... 359
Description ............................................................. 388
Description ............................................................ 359
DTC Logic ............................................................. 359 P1715 INPUT SPEED SENSOR (PRIMARY N
Diagnosis Procedure ............................................. 359 SPEED SENSOR) ........................................... 389
Special Repair Requirement ................................. 360 Description ............................................................. 389
P1226 TP SENSOR .......................................... 361 DTC Logic .............................................................. 389 O
Diagnosis Procedure ............................................. 389
Description ............................................................ 361
DTC Logic ............................................................. 361 P1720 VSS ...................................................... 391
Diagnosis Procedure ............................................. 361 Description ............................................................. 391 P
Special Repair Requirement ................................. 362 DTC Logic .............................................................. 391
P1421 COLD START CONTROL ..................... 363 Diagnosis Procedure ............................................. 391
Description ............................................................ 363 P1800 VIAS CONTROL SOLENOID VALVE 1. 393
DTC Logic ............................................................. 363 Description ............................................................. 393
Diagnosis Procedure ............................................. 363 DTC Logic .............................................................. 393
P1550 BATTERY CURRENT SENSOR ........... 365 Diagnosis Procedure ............................................. 393

Revision: 2008 October EC-5 2009 Murano

 Component Inspection ...........................................394 Special Repair Requirement ................................. 422

P1801 VIAS CONTROL SOLENOID VALVE 2. 396 P2138 APP SENSOR ....................................... 423
Description .............................................................396 Description ............................................................ 423
DTC Logic ..............................................................396 DTC Logic ............................................................. 423
Diagnosis Procedure .............................................396 Diagnosis Procedure ............................................. 424
Component Inspection ...........................................397 Component Inspection .......................................... 426
Special Repair Requirement ................................. 426
P1805 BRAKE SWITCH .................................. 399
Description .............................................................399 P2A00, P2A03 A/F SENSOR 1 ........................ 427
DTC Logic ..............................................................399 Description ............................................................ 427
Diagnosis Procedure .............................................399 DTC Logic ............................................................. 427
Component Inspection (Stop Lamp Switch) ..........401 Diagnosis Procedure ............................................. 428

P2100, P2103 THROTTLE CONTROL MO- ASCD BRAKE SWITCH ................................... 431
TOR RELAY ..................................................... 402 Description ............................................................ 431
Description .............................................................402 Component Function Check ................................. 431
DTC Logic ..............................................................402 Diagnosis Procedure ............................................. 431
Diagnosis Procedure .............................................402 Component Inspection (ASCD Brake Switch) ....... 432

P2101 ELECTRIC THROTTLE CONTROL ASCD INDICATOR ........................................... 433

FUNCTION ....................................................... 404 Description ............................................................ 433
Description .............................................................404 Component Function Check ................................. 433
DTC Logic ..............................................................404 Diagnosis Procedure ............................................. 433
Diagnosis Procedure .............................................404
Component Inspection ...........................................406
COOLING FAN ................................................. 434
Special Repair Requirement ..................................407 Description ............................................................ 434
Component Function Check ................................. 434
P2118 THROTTLE CONTROL MOTOR .......... 408 Diagnosis Procedure ............................................. 434
Description .............................................................408 Component Inspection (Cooling Fan Motor) ......... 437
DTC Logic ..............................................................408 Component Inspection (Cooling Fan Relay) ......... 438
Diagnosis Procedure .............................................408
Component Inspection ...........................................409
ELECTRICAL LOAD SIGNAL .......................... 439
Special Repair Requirement ..................................409 Description ............................................................ 439
Component Function Check ................................. 439
P2119 ELECTRIC THROTTLE CONTROL Diagnosis Procedure ............................................. 439
ACTUATOR ..................................................... 411
ELECTRONIC CONTROLLED ENGINE
Description .............................................................411
DTC Logic ..............................................................411
MOUNT ............................................................. 441
Description ............................................................ 441
Diagnosis Procedure .............................................412
Special Repair Requirement ..................................412 Component Function Check ................................. 441
Diagnosis Procedure ............................................. 441
P2122, P2123 APP SENSOR .......................... 413 Component Inspection .......................................... 442
Description .............................................................413
DTC Logic ..............................................................413
FUEL INJECTOR .............................................. 444
Description ............................................................ 444
Diagnosis Procedure .............................................413
Component Function Check ................................. 444
Component Inspection ...........................................415
Diagnosis Procedure ............................................. 444
Special Repair Requirement ..................................415
Component Inspection .......................................... 446
P2127, P2128 APP SENSOR .......................... 416
Description .............................................................416
FUEL PUMP ..................................................... 447
Description ............................................................ 447
DTC Logic ..............................................................416
Component Function Check ................................. 447
Diagnosis Procedure .............................................416
Diagnosis Procedure ............................................. 447
Component Inspection ...........................................418
Component Inspection (Fuel Pump) ..................... 450
Special Repair Requirement ..................................419
Component Inspection (Condenser) ..................... 450
P2135 TP SENSOR ......................................... 420
Description .............................................................420
IGNITION SIGNAL ............................................ 451
Description ............................................................ 451
DTC Logic ..............................................................420
Component Function Check ................................. 451
Diagnosis Procedure .............................................420
Diagnosis Procedure ............................................. 451
Component Inspection ...........................................422

Revision: 2008 October EC-6 2009 Murano

 Component Inspection (Ignition Coil with Power NORMAL OPERATING CONDITION ............. 537
Transistor) ............................................................. 454 Description ............................................................. 537 A
Component Inspection (Condenser) ..................... 455
PRECAUTION ............................................ 538
MALFUNCTION INDICATOR LAMP ............... 456
Description ............................................................ 456 PRECAUTIONS ............................................... 538 EC
Component Function Check .................................. 456 Precaution for Supplemental Restraint System
Diagnosis Procedure ............................................. 456 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................... 538 C
ON BOARD REFUELING VAPOR RECOV- Precautions For Xenon Headlamp Service ........... 538
ERY (ORVR) ..................................................... 457 Precaution for Procedure without Cowl Top Cover.. 538
Description ............................................................ 457 On Board Diagnostic (OBD) System of Engine D
Component Function Check .................................. 457 and CVT ................................................................ 539
Diagnosis Procedure ............................................. 457 General Precautions .............................................. 539
Component Inspection .......................................... 460
PREPARATION ......................................... 543 E
POSITIVE CRANKCASE VENTILATION ........ 462
Description ............................................................ 462 PREPARATION ............................................... 543
Component Inspection .......................................... 462 Special Service Tools ............................................ 543 F
Commercial Service Tools ..................................... 543
REFRIGERANT PRESSURE SENSOR ........... 463
Description ............................................................ 463 ON-VEHICLE MAINTENANCE .................. 545
Component Function Check .................................. 463 G
Diagnosis Procedure ............................................. 463 FUEL PRESSURE ........................................... 545
Inspection .............................................................. 545
VARIABLE INDUCTION AIR SYSTEM ............ 466 H
Description ............................................................ 466 EVAP LEAK CHECK ...................................... 547
Component Function Check .................................. 466 Inspection .............................................................. 547
Diagnosis Procedure ............................................. 467
ON-VEHICLE REPAIR ............................... 549 I
ECU DIAGNOSIS ....................................... 470
EVAP CANISTER ............................................ 549
ECM .................................................................. 470 Exploded View ....................................................... 549
Removal and Installation ....................................... 549 J
Reference Value ................................................... 470
Wiring DiagramENGINE CONTROL SYS- Inspection .............................................................. 550
TEM ................................................................... 484
Fail-safe ................................................................ 517
SERVICE DATA AND SPECIFICATIONS K
DTC Inspection Priority Chart ............................. 519 (SDS) .......................................................... 551
DTC Index ............................................................ 521
SERVICE DATA AND SPECIFICATIONS
How to Set SRT Code ........................................ 524 L
Test Value and Test Limit .................................. 526
(SDS) ............................................................... 551
Idle Speed ............................................................. 551
SYMPTOM DIAGNOSIS ............................ 533 Ignition Timing ....................................................... 551
Calculated Load Value .......................................... 551 M
ENGINE CONTROL SYSTEM SYMPTOMS .... 533 Mass Air Flow Sensor ............................................ 551
Symptom Table ..................................................... 533
N

Revision: 2008 October EC-7 2009 Murano

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [VQ35DE]

BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow INFOID:0000000003387866

OVERALL SEQUENCE

JMBIA1416GB

DETAILED FLOW

Revision: 2008 October EC-8 2009 Murano

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [VQ35DE]

1.GET INFORMATION FOR SYMPTOM A

Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using the Diagnostic Work Sheet. (Refer to EC-11, "Diagnostic Work
Sheet".)
EC

>> GO TO 2.
2.CHECK DTC C
1. Check DTC.
2. Perform the following procedure if DTC is displayed.
- Record DTC and freeze frame data. (Print them out with CONSULT-III or GST.) D
- Erase DTC. (Refer to EC-102, "Diagnosis Description".)
- Study the relationship between the cause detected by DTC and the symptom described by the customer.
(Symptom Table is useful. Refer to EC-533, "Symptom Table".) E
3. Check related service bulletins for information.
Is any symptom described and any DTC detected?
Symptom is described, DTC is displayed>>GO TO 3. F
Symptom is described, DTC is not displayed>>GO TO 4.
Symptom is not described, DTC is displayed>>GO TO 5.
3.CONFIRM THE SYMPTOM G
Try to confirm the symptom described by the customer (except MIL ON).
Also study the normal operation and fail safe related to the symptom. Refer to EC-537, "Description" and EC-
517, "Fail-safe". H
Diagnosis Work Sheet is useful to verify the incident.
Verify relation between the symptom and the condition when the symptom is detected.
I
>> GO TO 5.
4.CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer. J
Also study the normal operation and fail safe related to the symptom. Refer to EC-537, "Description" and EC-
517, "Fail-safe".
Diagnosis Work Sheet is useful to verify the incident. K
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6. L
5.PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC CONFIRMATION PROCEDURE for the displayed DTC, and then check that DTC is detected
M
again.
If two or more DTCs are detected, refer to EC-519, "DTC Inspection Priority Chart" and determine trouble
diagnosis order.
NOTE: N
Freeze frame data is useful if the DTC is not detected.
Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included on Service
Manual. This simplified check procedure is an effective alternative though DTC cannot be detected during O
this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIR-
MATION PROCEDURE.
Is DTC detected? P
YES >> GO TO 10.
NO >> Check according to GI-40, "Intermittent Incident".
6.PERFORM BASIC INSPECTION
Perform EC-12, "BASIC INSPECTION : Special Repair Requirement".
Will CONSULT-III be used?

Revision: 2008 October EC-9 2009 Murano

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [VQ35DE]
YES >> GO TO 7.
NO >> GO TO 9.
7.PERFORM SPEC OF DATA MONITOR MODE
With CONSULT-III
Check that MAS A/F SE-B1, B/FUEL SCHDL, A/F ALPHA-B1 and A/F ALPHA-B2 are within the SP
value using SPEC of DATA MONITOR mode with CONSULT-III. Refer to EC-127, "Component Function
Check".
Are they within the SP value?
YES >> GO TO 9.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Detect malfunctioning part according to EC-128, "Diagnosis Procedure".
Is malfunctioning part detected?
YES >> GO TO 11.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE
Detect malfunctioning system according to EC-533, "Symptom Table" based on the confirmed symptom in
step 4, and determine the trouble diagnosis order based on possible causes and symptom.

>> GO TO 10.
10.DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure in EC section described 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-
43, "Circuit Inspection".
Is malfunctioning part detected?
YES >> GO TO 11.
NO >> Monitor input data from related sensors or check voltage of related ECM terminals using CON-
SULT-III. Refer to EC-470, "Reference Value".
11.REPAIR OR REPLACE THE MALFUNCTIONING PART
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.
3. Check DTC. If DTC is displayed, erase it, refer to EC-102, "Diagnosis Description".

>> GO TO 12.
12.FINAL CHECK
When DTC was detected in step 2, perform DTC CONFIRMATION PROCEDURE or Component Function
Check again, and then check that the malfunction have been repaired securely.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that
the symptom is not detected.
Is DTC detected and does symptom remain?
YES-1 >> DTC is detected: GO TO 10.
YES-2 >> Symptom remains: GO TO 6.
NO >> Before returning the vehicle to the customer, erase unnecessary DTC in ECM and TCM (Trans-
mission Control Module) certainly. (Refer to EC-102, "Diagnosis Description".) If the completion of
SRT is needed, drive vehicle under the specific DRIVING PATTERN in EC-524,
"How to Set SRT Code".

Revision: 2008 October EC-10 2009 Murano

 DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION > [VQ35DE]
Diagnostic Work Sheet INFOID:0000000003387867

A
DESCRIPTION
There are many operating conditions that lead to the malfunction of
engine components. A good grasp of such conditions can make trou- EC
bleshooting faster and more accurate.
In general, each customer feels differently about symptoms. It is
important to fully understand the symptoms or conditions for a cus- C
tomer complaint.
Utilize a diagnostic worksheet like the WORKSHEET SAMPLE
below in order to organize all the information for troubleshooting.
Some conditions may cause the MIL to illuminate or blink, and DTC D
to be detected. Examples:
Vehicle ran out of fuel, which caused the engine to misfire.
SEF907L
Fuel filler cap was left off or incorrectly screwed on, allowing fuel to E
evaporate into the atmosphere.
WORKSHEET SAMPLE
F

MTBL0017

Revision: 2008 October EC-11 2009 Murano

 INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [VQ35DE]
INSPECTION AND ADJUSTMENT
BASIC INSPECTION
BASIC INSPECTION : Special Repair Requirement INFOID:0000000003387868

1.INSPECTION START
1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
- Harness connectors for improper connections
- Wiring harness for improper connections, pinches and cut
- Vacuum hoses for splits, kinks and improper connections
- Hoses and ducts for leakage
- Air cleaner clogging
- Gasket
3. Check that electrical or mechanical loads are not applied.
- Head lamp switch is OFF.
- Air conditioner switch is OFF.
- Rear window defogger switch is OFF.
SEF983U
- Steering wheel is in the straight-ahead position, etc.

4. Start engine and warm it up until engine coolant temperature

indicator points to the middle of gauge.
Check that engine stays below 1,000 rpm.

SEF976U

5. Run engine at approximately 2,000 rpm for approximately 2 min-

utes under no load.
6. Check that no DTC is displayed with CONSULT-III or GST.
Are any DTCs detected?
YES >> GO TO 2.
NO >> GO TO 3.

SEF977U

2.REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.

>> GO TO 3
3.CHECK TARGET IDLE SPEED
1. Run engine at approximately 2,000 rpm for approximately 2 minutes under no load.

Revision: 2008 October EC-12 2009 Murano

 INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [VQ35DE]
2. Rev engine (2,000 to 3,000 rpm) 2 or 3 times under no load,
then run engine at idle speed for approximately 1 minute. A
3. Check idle speed.
For procedure, refer to EC-15, "IDLE SPEED : Special Repair
Requirement".
EC
For specification, refer to EC-551, "Idle Speed".
Is the inspection result normal?
YES >> GO TO 10.
C
NO >> GO TO 4.

PBIA8513J

4.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING D

1. Stop engine.
2. Perform EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
E
ment".

>> GO TO 5.
F
5.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
G
>> GO TO 6.
6.PERFORM IDLE AIR VOLUME LEARNING H
Perform EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 7. I
NO >> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
7.CHECK IDLE SPEED AGAIN J
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
For procedure, refer to EC-15, "IDLE SPEED : Special Repair Requirement".
For specification, refer to EC-551, "Idle Speed". K
Is the inspection result normal?
YES >> GO TO 10.
L
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the Following. M
Check camshaft position sensor (PHASE) and circuit. Refer to EC-265, "Diagnosis Procedure".
Check crankshaft position sensor (POS) and circuit. Refer to EC-261, "Diagnosis Procedure".
Is the inspection result normal? N
YES >> GO TO 9.
NO >> Repair or replace malfunctioning part. Then GO TO 4.
9.CHECK ECM FUNCTION O
1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to P
SEC-11, "ECM RECOMMUNICATING FUNCTION : Special Repair Requirement".

>> GO TO 4.
10.CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.

Revision: 2008 October EC-13 2009 Murano

 INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [VQ35DE]
For procedure, refer to EC-16, "IGNITION TIMING : Special Repair Requirement".
For specification, refer to EC-551, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 19.
NO >> GO TO 11.
11.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
ment".

>> GO TO 12.
12.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".

>> GO TO 13.
13.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 14.
NO >> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
14.CHECK IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
For procedure, refer to EC-15, "IDLE SPEED : Special Repair Requirement".
For specification, refer to EC-551, "Idle Speed".
Is the inspection result normal?
YES >> GO TO 15.
NO >> GO TO 17.
15.CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light.
For procedure, refer to EC-16, "IGNITION TIMING : Special Repair Requirement".
For specification, refer to EC-551, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 19.
NO >> GO TO 16.
16.CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-54, "Removal and Installation".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Repair the timing chain installation. Then GO TO 4.
17.DETECT MALFUNCTIONING PART
Check the following.
Check camshaft position sensor (PHASE) and circuit. Refer to EC-265, "Diagnosis Procedure".
Check crankshaft position sensor (POS) and circuit. Refer to EC-261, "Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 18.
NO >> Repair or replace malfunctioning part. Then GO TO 4.
18.CHECK ECM FUNCTION
Revision: 2008 October EC-14 2009 Murano
 INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [VQ35DE]
1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare.) A
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement".
EC
>> GO TO 4.
19.INSPECTION END
C
If ECM is replaced during this BASIC INSPECTION procedure, perform EC-15, "ADDITIONAL SERVICE
WHEN REPLACING CONTROL UNIT : Special Repair Requirement".

D
>> INSPECTION END
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description E
INFOID:0000000003387869

When replacing ECM, the following procedure must be performed.

F
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement INFOID:0000000003387870

G
1.PERFORM INITIALIZATION OF NVIS (NATS) SYSTEM AND REGISTRATION OF ALL NVIS (NATS) IGNI-
TION KEY IDS
H
Refer to SEC-11, "ECM RECOMMUNICATING FUNCTION : Special Repair Requirement".

>> GO TO 2.
I
2.PERFORM VIN REGISTRATION
Refer to EC-16, "VIN REGISTRATION : Special Repair Requirement".
J
>> GO TO 3.
3.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING K
Refer to EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement".

>> GO TO 4. L
4.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement". M

>> GO TO 5.
5.PERFORM IDLE AIR VOLUME LEARNING N
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement".
O
>> END
IDLE SPEED
P
IDLE SPEED : Description INFOID:0000000003387871

This describes how to check the idle speed. For the actual procedure, follow the instructions in BASIC
INSPECTION.
IDLE SPEED : Special Repair Requirement INFOID:0000000003387872

1.CHECK IDLE SPEED

Revision: 2008 October EC-15 2009 Murano
 INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [VQ35DE]
With CONSULT-III
Check idle speed in DATA MONITOR mode with CONSULT-III.
With GST
Check idle speed with Service $01 of GST.

>> INSPECTION END

IGNITION TIMING
IGNITION TIMING : Description INFOID:0000000003387873

This describes how to check the ignition timing. For the actual procedure, follow the instructions in BASIC
INSPECTION.
IGNITION TIMING : Special Repair Requirement INFOID:0000000003387874

1.CHECK IGNITION TIMING

1. Attach timing light to loop wires as shown.
- Timing light (A)
- : Vehicle front

JMBIA1128ZZ

2. Check ignition timing.

>> INSPECTION END

JMBIA1135GB

VIN REGISTRATION
VIN REGISTRATION : Description INFOID:0000000003387875

VIN Registration is an operation to register VIN in ECM. It must be performed each time ECM is replaced.
NOTE:
Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).
VIN REGISTRATION : Special Repair Requirement INFOID:0000000003387876

1.CHECK VIN
Check the VIN of the vehicle and note it. Refer to GI-23, "Information About Identification or Model Code".

>> GO TO 2.
2.PERFORM VIN REGISTRATION
With CONSULT-III
1. Turn ignition switch ON with engine stopped.

Revision: 2008 October EC-16 2009 Murano

 INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [VQ35DE]
2. Select VIN REGISTRATION in WORK SUPPORT mode.
3. Follow the instructions on the CONSULT-III display. A

>> END
ACCELERATOR PEDAL RELEASED POSITION LEARNING EC

ACCELERATOR PEDAL RELEASED POSITION LEARNING : Description INFOID:0000000003387877

C
Accelerator Pedal Released Position Learning is a function of ECM 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 the harness connector of the accelerator pedal position sensor or ECM is disconnected.
D
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Re-
quirement INFOID:0000000003387878

E
1.START
1. Check that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds. F
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds. G

>> END
THROTTLE VALVE CLOSED POSITION LEARNING H

THROTTLE VALVE CLOSED POSITION LEARNING : Description INFOID:0000000003387879

Throttle Valve Closed Position Learning is a function of ECM to learn the fully closed position of the throttle I
valve by monitoring the throttle position sensor output signal. It must be performed each time the harness con-
nector of electric throttle control actuator or ECM is disconnected.
J
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement
INFOID:0000000003387880

1.START K

1. Check that accelerator pedal is fully released.

2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. L
Check that throttle valve moves during the above 10 seconds by confirming the operating sound.

>> END M
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING : Description INFOID:0000000003387881 N

Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps engine idle speed within
the specific range. It must be performed under the following conditions: O
Each time the electric throttle control actuator or ECM is replaced.
Idle speed or ignition timing is out of the specification.
IDLE AIR VOLUME LEARNING : Special Repair Requirement INFOID:0000000003387882 P

1.PRECONDITIONING
Check 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 12.9 V (At idle)
Engine coolant temperature: 70 - 100C (158 - 212F)
Selector lever position: P or N

Revision: 2008 October EC-17 2009 Murano

 INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [VQ35DE]
Electric load switch: OFF
(Air conditioner, head lamp, rear window defogger)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the head lamp will not illuminate.
Steering wheel: Neutral (Straight-ahead position)
Vehicle speed: Stopped
Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until ATF TEMP SEN in DATA MONITOR mode of CVT system indi-
cates less than 0.9 V.
- Without CONSULT-III: Drive vehicle for 10 minutes.
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM IDLE AIR VOLUME LEARNING
With CONSULT-III
1. Perform EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
ment".
2. Perform EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
3. Start engine and warm it up to normal operating temperature.
4. Select IDLE AIR VOL LEARN in WORK SUPPORT mode.
5. Touch START and wait 20 seconds.
Is CMPLT displayed on CONSULT-III screen?
YES >> GO TO 4.
NO >> GO TO 5.
3.PERFORM IDLE AIR VOLUME LEARNING
Without CONSULT-III
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-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
ment".
2. Perform EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
6. Repeat the following procedure quickly 5 times within 5 seconds.
- Fully depress the accelerator pedal.
- Fully release the accelerator pedal.
7. Wait 7 seconds, fully depress the accelerator pedal for approx. 20 seconds until the MIL stops blinking
and turns ON.
8. Fully release the accelerator pedal within 3 seconds after the MIL turns ON.
9. Start engine and let it idle.
10. Wait 20 seconds.

SEC897C

>> GO TO 4.

Revision: 2008 October EC-18 2009 Murano

 INSPECTION AND ADJUSTMENT
< BASIC INSPECTION > [VQ35DE]

4.CHECK IDLE SPEED AND IGNITION TIMING A

Rev up the engine 2 or 3 times and check that idle speed and ignition timing are within the specifications.
For procedure, refer to EC-15, "IDLE SPEED : Special Repair Requirement" and EC-16, "IGNITION TIMING :
Special Repair Requirement".
EC
For specifications, refer to EC-551, "Idle Speed" and EC-551, "Ignition Timing".
Is the inspection result normal?
YES >> INSPECTION END
C
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART-I
Check the following D
Check that throttle valve is fully closed.
Check PCV valve operation.
Check that downstream of throttle valve is free from air leakage. E
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace malfunctioning part. F
6.DETECT MALFUNCTIONING PART-II
Engine component parts and their installation condition are questionable. Check and eliminate the cause of
the incident. G
It is useful to perform TROUBLE DIAGNOSIS - SPECIFICATION VALUE. Refer to EC-127, "Description".
If any of the following conditions occur after the engine has started, eliminate the cause of the incident and
perform Idle Air Volume Learning again: H
Engine stalls.
Incorrect idle.
I
>> INSPECTION END
MIXTURE RATIO SELF-LEARNING VALUE CLEAR
J
MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Description INFOID:0000000003387883

This describes show to erase the mixture ratio self-learning value. For the actual procedure, follow the instruc-
tions in Diagnosis Procedure. K
MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Special Repair Requirement
INFOID:0000000003387884
L
1.START
With CONSULT-III M
1. Start engine and warm it up to normal operating temperature.
2. Select SELF-LEARNING CONT in WORK SUPPORT mode with CONSULT-III.
3. Clear mixture ratio self-learning value by touching CLEAR.
With GST N
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect mass air flow sensor harness connector. O
4. Restart engine and let it idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor harness connector.
6. Select Service $03 with GST. Check that DTC P0102 is detected.
7. Select Service $04 with GST to erase the DTC P0102. P

>> END

Revision: 2008 October EC-19 2009 Murano

 ENGINE CONTROL SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

FUNCTION DIAGNOSIS
ENGINE CONTROL SYSTEM
System Diagram INFOID:0000000003387885

JMBIA1136GB

Revision: 2008 October EC-20 2009 Murano

 ENGINE CONTROL SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
System Description INFOID:0000000003387886

A
ECM performs various controls such as fuel injection control and ignition timing control.
Component Parts Location INFOID:0000000003387887
EC

JMBIA1108ZZ
M
1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2 N
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
O
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
P
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1)
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-21 2009 Murano

 ENGINE CONTROL SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1109ZZ

1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front

JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2)
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
: Vehicle front

JMBIA1114ZZ

1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front

Revision: 2008 October EC-22 2009 Murano

 ENGINE CONTROL SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1112ZZ

D
1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
E
: Vehicle front

JMBIA1113ZZ

I
1. Refrigerant pressure sensor 2. Battery current sensor
: Vehicle front
J

JMBIA1115ZZ
M

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front N

Revision: 2008 October EC-23 2009 Murano

 ENGINE CONTROL SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1832GB

JMBIA1116ZZ

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH)
: Vehicle front

Revision: 2008 October EC-24 2009 Murano

 ENGINE CONTROL SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1111ZZ

D
1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor E
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front
F

I
JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
J
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

N
1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-25 2009 Murano

 ENGINE CONTROL SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch

4. SET/COAST switch 5. MAIN switch

JMBIA1121ZZ

1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front

Component Description INFOID:0000000003387888

Component Reference
A/F sensor 1 EC-186, "Description"
A/F sensor 1 heater EC-145, "Description"
Accelerator pedal position sensor EC-413, "Description"
ASCD brake switch EC-380, "Description"
ASCD steering switch EC-377, "Description"
Battery current sensor EC-365, "Description"
Camshaft position sensor (PHASE) EC-264, "Description"
Cooling fan motor EC-434, "Description"
Crankshaft position sensor (POS) EC-260, "Description"
Electric throttle control actuator EC-411, "Description"
Electronic controlled engine mount EC-441, "Description"
Engine coolant temperature sensor EC-170, "Description"
Engine oil temperature sensor EC-242, "Description"
EVAP canister purge volume control solenoid valve EC-284, "Description"
EVAP canister vent control valve EC-292, "Description"
EVAP control system pressure sensor EC-300, "Description"
Fuel injector EC-444, "Description"
Fuel level sensor EC-327, "Description"
Fuel pump EC-447, "Description"
Fuel tank temperature sensor EC-236, "Description"
Heated oxygen sensor 2 EC-203, "Description"
Heated oxygen sensor 2 heater EC-148, "Description"
Ignition coil with power transistor EC-451, "Description"
Intake air temperature sensor EC-167, "Description"
Intake valve timing control solenoid valve EC-151, "Description"
Knock sensor EC-257, "Description"
Mass air flow sensor EC-154, "Description"

Revision: 2008 October EC-26 2009 Murano

 ENGINE CONTROL SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Reference
A
PCV valve EC-462, "Description"
Power steering pressure sensor EC-339, "Description"
Power valves 1 and 2 EC-466, "Description" EC
Refrigerant pressure sensor EC-463, "Description"
Stop lamp switch EC-399, "Description"
TCM EC-350, "Description" C
Throttle control motor EC-408, "Description"
Throttle control motor relay EC-402, "Description"
D
Throttle position sensor EC-175, "Description"
VIAS control solenoid valve 1 EC-393, "Description"
VIAS control solenoid valve 2 EC-396, "Description" E

Revision: 2008 October EC-27 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
MULTIPORT FUEL INJECTION SYSTEM
System Diagram INFOID:0000000003387889

JMBIA1833GB

System Description INFOID:0000000003387890

INPUT/OUTPUT SIGNAL CHART

Sensor Input signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Engine speed*3
Camshaft position sensor (PHASE) Piston position
Mass air flow sensor Amount of intake air
Intake air temperature sensor Intake air temperature
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position Fuel injection
TCM Gear position & mixture ratio Fuel injector
control
Battery Battery voltage*3
Knock sensor Engine knocking condition
Power steering pressure sensor Power steering operation

Heated oxygen sensor 2*1 Density of oxygen in exhaust gas

ABS actuator and electric unit (control unit) VDC/TCS operation command*2
Combination meter Vehicle speed*2
BCM Air conditioner operation*2
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM via the CAN communication line.

Revision: 2008 October EC-28 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
A
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined EC
by input signals (for engine speed and intake air) from the crankshaft position sensor (POS), camshaft position
sensor (PHASE) and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION C
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.
D
<Fuel increase>
During warm-up
When starting the engine
During acceleration E
Hot-engine operation
When selector lever position is changed from N to D
High-load, high-speed operation F
<Fuel decrease>
During deceleration
During high engine speed operation G
MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)

J
PBIB3020E

The mixture ratio feedback system provides the best air-fuel mixture ratio for drive ability and emission control.
The three way catalyst (manifold) can better reduce CO, HC and NOx emissions. This system uses A/F sen- K
sor 1 in the exhaust manifold to monitor whether the engine operation is rich or lean. The ECM adjusts the
injection pulse width according to the sensor voltage signal. For more information about A/F sensor 1, refer to
EC-186, "Description". This maintains the mixture ratio within the range of stoichiometric (ideal air-fuel mix-
L
ture).
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 A/F sensor 1 shift, the air-fuel ratio is controlled to stoichiometric by the signal from heated M
oxygen sensor 2.
Open Loop Control
The open loop system condition refers to when the ECM detects any of the following conditions. Feedback
N
control stops in order to maintain stabilized fuel combustion.
- Deceleration and acceleration
- High-load, high-speed operation
- Malfunction of A/F sensor 1 or its circuit O
- Insufficient activation of A/F sensor 1 at low engine coolant temperature
- High engine coolant temperature
- During warm-up P
- After shifting from N to D
- When starting the engine
MIXTURE RATIO SELF-LEARNING CONTROL
The mixture ratio feedback control system monitors the mixture ratio signal transmitted from A/F sensor 1.
This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to the theoret-
ical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as originally

Revision: 2008 October EC-29 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
designed. Both manufacturing differences (i.e., mass air flow sensor hot wire) and characteristic changes dur-
ing operation (i.e., fuel 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 theoretical
value. The signal from A/F sensor 1 indicates whether the mixture ratio is RICH or LEAN compared to the the-
oretical 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 over time to compensate for continual deviation
of the short-term fuel trim from the central value. Continual deviation will occur due to individual engine differ-
ences, 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 ignition 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 2 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, operation of the engine at excessively high speeds or oper-
ation of the vehicle at excessively high speeds.

Revision: 2008 October EC-30 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Parts Location INFOID:0000000003573769

EC

JMBIA1108ZZ

L
1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2 M
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
N
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
O
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1) P
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-31 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1109ZZ

1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front

JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2)
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
: Vehicle front

JMBIA1114ZZ

1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front

Revision: 2008 October EC-32 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1112ZZ

D
1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
E
: Vehicle front

JMBIA1113ZZ

I
1. Refrigerant pressure sensor 2. Battery current sensor
: Vehicle front
J

JMBIA1115ZZ
M

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front N

Revision: 2008 October EC-33 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1832GB

JMBIA1116ZZ

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH)
: Vehicle front

Revision: 2008 October EC-34 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1111ZZ

D
1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor E
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front
F

I
JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
J
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

N
1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-35 2009 Murano

 MULTIPORT FUEL INJECTION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch

4. SET/COAST switch 5. MAIN switch

JMBIA1121ZZ

1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front

Component Description INFOID:0000000003387892

Component Reference
A/F sensor 1 EC-186, "Description"
Accelerator pedal position sensor EC-413, "Description"
Camshaft position sensor (PHASE) EC-264, "Description"
Crankshaft position sensor (POS) EC-260, "Description"
Engine coolant temperature sensor EC-170, "Description"
Fuel injector EC-444, "Description"
Heated oxygen sensor 2 EC-203, "Description"
Intake air temperature sensor EC-167, "Description"
Knock sensor EC-257, "Description"
Mass air flow sensor EC-154, "Description"
Power steering pressure sensor EC-339, "Description"
TCM EC-350, "Description"
Throttle position sensor EC-175, "Description"

Revision: 2008 October EC-36 2009 Murano

 ELECTRIC IGNITION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
ELECTRIC IGNITION SYSTEM
A
System Diagram INFOID:0000000003387893

EC

JMBIA1834GB

G
System Description INFOID:0000000003387894

INPUT/OUTPUT SIGNAL CHART H

Sensor Input signal to ECM ECM function Actuator

Crankshaft position sensor (POS) I
Engine speed*2
Camshaft position sensor (PHASE) Piston position
Mass air flow sensor Amount of intake air
J
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensor Throttle position
Ignition timing Ignition coil
Accelerator pedal position sensor Accelerator pedal position control (with power transistor) K
TCM Gear position
Battery Battery voltage*2
L
Knock sensor Engine knocking
Combination meter Vehicle speed*1
*1: This signal is sent to the ECM via the CAN communication line. M
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTION N
Ignition order: 1 - 2 - 3 - 4 - 5 - 6
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig- O
nal. Computing this information, ignition signals are transmitted to the power transistor.
During the following conditions, the ignition timing is revised by the ECM according to the other data stored in
the ECM. P
At starting
During warm-up
At idle
At low battery voltage
During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not

Revision: 2008 October EC-37 2009 Murano

 ELECTRIC IGNITION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
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.
Component Parts Location INFOID:0000000003573784

JMBIA1108ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1)
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-38 2009 Murano

 ELECTRIC IGNITION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1109ZZ

D
1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front
E

H
JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2) I
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
J
: Vehicle front

JMBIA1114ZZ

N
1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front
O

Revision: 2008 October EC-39 2009 Murano

 ELECTRIC IGNITION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1112ZZ

1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
: Vehicle front

JMBIA1113ZZ

1. Refrigerant pressure sensor 2. Battery current sensor

: Vehicle front

JMBIA1115ZZ

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front

Revision: 2008 October EC-40 2009 Murano

 ELECTRIC IGNITION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1832GB

JMBIA1116ZZ I

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
J
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ N

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH) O
: Vehicle front

Revision: 2008 October EC-41 2009 Murano

 ELECTRIC IGNITION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1111ZZ

1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front

JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-42 2009 Murano

 ELECTRIC IGNITION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch A

4. SET/COAST switch 5. MAIN switch

EC

JMBIA1121ZZ

E
1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front
F

Component Description INFOID:0000000003387896

G
Component Reference
Accelerator pedal position sensor EC-413, "Description"
H
Camshaft position sensor (PHASE) EC-264, "Description"
Crankshaft position sensor (POS) EC-260, "Description"
Engine coolant temperature sensor EC-170, "Description" I
Ignition signal EC-451, "Description"
Knock sensor EC-257, "Description"
J
Mass air flow sensor EC-154, "Description"
TCM EC-350, "Description"
Throttle position sensor EC-175, "Description" K

Revision: 2008 October EC-43 2009 Murano

 AIR CONDITIONING CUT CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]
AIR CONDITIONING CUT CONTROL
System Diagram INFOID:0000000003387897

JMBIA1835GB

System Description INFOID:0000000003387898

INPUT/OUTPUT SIGNAL CHART

Sensor Input signal to ECM ECM function Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*2

Engine coolant temperature sensor Engine coolant temperature

Accelerator pedal position sensor Accelerator pedal position IPDM E/R

Battery Battery voltage*2 Air conditioner
Air conditioner relay
cut control
Refrigerant pressure sensor Refrigerant pressure
Compressor
Power steering pressure sensor Power steering operation
Combination meter Vehicle speed*1
BCM Air conditioner ON signal*1
*1: This signal is sent to the ECM via the CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.

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.

Revision: 2008 October EC-44 2009 Murano

 AIR CONDITIONING CUT CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Parts Location INFOID:0000000003573785

EC

JMBIA1108ZZ

L
1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2 M
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
N
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
O
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1) P
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-45 2009 Murano

 AIR CONDITIONING CUT CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1109ZZ

1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front

JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2)
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
: Vehicle front

JMBIA1114ZZ

1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front

Revision: 2008 October EC-46 2009 Murano

 AIR CONDITIONING CUT CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1112ZZ

D
1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
E
: Vehicle front

JMBIA1113ZZ

I
1. Refrigerant pressure sensor 2. Battery current sensor
: Vehicle front
J

JMBIA1115ZZ
M

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front N

Revision: 2008 October EC-47 2009 Murano

 AIR CONDITIONING CUT CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1832GB

JMBIA1116ZZ

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH)
: Vehicle front

Revision: 2008 October EC-48 2009 Murano

 AIR CONDITIONING CUT CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1111ZZ

D
1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor E
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front
F

I
JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
J
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

N
1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-49 2009 Murano

 AIR CONDITIONING CUT CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch

4. SET/COAST switch 5. MAIN switch

JMBIA1121ZZ

1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front

Component Description INFOID:0000000003387900

Component Reference
Accelerator pedal position sensor EC-413, "Description"
Camshaft position sensor (PHASE) EC-264, "Description"
Crankshaft position sensor (POS) EC-260, "Description"
Engine coolant temperature sensor EC-170, "Description"
Power steering pressure sensor EC-339, "Description"
Refrigerant pressure sensor EC-463, "Description"

Revision: 2008 October EC-50 2009 Murano

 AUTOMATIC SPEED CONTROL DEVICE (ASCD)
< FUNCTION DIAGNOSIS > [VQ35DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
A
System Diagram INFOID:0000000003387901

EC

JMBIA1826GB

G
System Description INFOID:0000000003387902

INPUT/OUTPUT SIGNAL CHART H

Sensor Input signal to ECM ECM function Actuator

ASCD brake switch Brake pedal operation I
Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation Electric throttle control
ASCD vehicle speed control J
Gear position actuator
TCM
Powertrain revolution*
Combination meter Vehicle speed* K
*: This signal is sent to the ECM via the CAN communication line

BASIC ASCD SYSTEM L

Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH). M
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE on combination meter. If any malfunction occurs in the
ASCD system, it automatically deactivates control. N
NOTE:
Always drive vehicle in a safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION O
Press MAIN switch. (The CRUISE on combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET/COAST switch. P
ACCELERATE OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will maintain the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.

Revision: 2008 October EC-51 2009 Murano

 AUTOMATIC SPEED CONTROL DEVICE (ASCD)
< FUNCTION DIAGNOSIS > [VQ35DE]
CANCEL switch is pressed
More than 2 switches on ASCD steering switch are pressed at the same time (Set speed will be cleared)
Brake pedal is depressed
Selector lever position changed to N, P or R
Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
TCS system is operated
CVT control system has a malfunction. Refer to EC-388, "Description".
Engine coolant temperature is slightly higher than the normal operating temperature
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.
Malfunction for some self-diagnoses regarding ASCD control: CRUISE will blink quickly.
If MAIN switch is turned to OFF while ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will maintain the new set speed.
RESUME OPERATION
When the RESUME/ACCELERATE switch is pressed after canceling operation other than pressing the MAIN
switch is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition
must meet following conditions.
Brake pedal is released
Selector lever position is other than P and N
Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)

Revision: 2008 October EC-52 2009 Murano

 AUTOMATIC SPEED CONTROL DEVICE (ASCD)
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Parts Location INFOID:0000000003573786

EC

JMBIA1108ZZ

L
1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2 M
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
N
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
O
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1) P
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-53 2009 Murano

 AUTOMATIC SPEED CONTROL DEVICE (ASCD)
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1109ZZ

1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front

JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2)
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
: Vehicle front

JMBIA1114ZZ

1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front

Revision: 2008 October EC-54 2009 Murano

 AUTOMATIC SPEED CONTROL DEVICE (ASCD)
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1112ZZ

D
1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
E
: Vehicle front

JMBIA1113ZZ

I
1. Refrigerant pressure sensor 2. Battery current sensor
: Vehicle front
J

JMBIA1115ZZ
M

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front N

Revision: 2008 October EC-55 2009 Murano

 AUTOMATIC SPEED CONTROL DEVICE (ASCD)
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1832GB

JMBIA1116ZZ

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH)
: Vehicle front

Revision: 2008 October EC-56 2009 Murano

 AUTOMATIC SPEED CONTROL DEVICE (ASCD)
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1111ZZ

D
1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor E
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front
F

I
JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
J
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

N
1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-57 2009 Murano

 AUTOMATIC SPEED CONTROL DEVICE (ASCD)
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch

4. SET/COAST switch 5. MAIN switch

JMBIA1121ZZ

1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front

Component Description INFOID:0000000003387904

Component Reference
ASCD brake switch EC-380, "Description"
ASCD indicator EC-433, "Description"
ASCD steering switch EC-377, "Description"
Electric throttle control actuator EC-411, "Description"
Stop lamp switch EC-399, "Description"

Revision: 2008 October EC-58 2009 Murano

 CAN COMMUNICATION
< FUNCTION DIAGNOSIS > [VQ35DE]
CAN COMMUNICATION
A
System Description INFOID:0000000003387905

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul- EC
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic 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. C
Each control unit transmits/receives data but selectively reads required data only.
Refer to LAN-25, "CAN Communication Signal Chart", about CAN communication for detail.
D

Revision: 2008 October EC-59 2009 Murano

 COOLING FAN CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]
COOLING FAN CONTROL
System Diagram INFOID:0000000003387906

JMBIA1857GB

System Description INFOID:0000000003387907

INPUT/OUTPUT SIGNAL CHART

Sensor Input signal to ECM ECM function Actuator

Crankshaft position sensor (POS) 1
Engine speed*
Camshaft position sensor (PHASE) Piston position
Engine coolant temperature sensor Engine coolant temperature IPDM E/R

Refrigerant pressure sensor Refrigerant pressure Cooling fan
Cooling fan relay
control
Battery Battery voltage*1
Cooling fan motor
Combination meter Vehicle speed*2
BCM Air conditioner ON signal*2
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM via the CAN communication line.

SYSTEM DESCRIPTION
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].

Revision: 2008 October EC-60 2009 Murano

 COOLING FAN CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]
Cooling Fan Operation
A

EC

H
JMBIA0179GB

Cooling Fan Relay Operation

The ECM controls cooling fan relays in the IPDM E/R through CAN communication line. I
Cooling fan relay
Cooling fan speed
1 2 3 J
Stop (OFF) OFF OFF OFF
Low (LOW) ON OFF OFF
Middle (MID) OFF ON OFF K
High (HI) OFF ON ON

Revision: 2008 October EC-61 2009 Murano

 COOLING FAN CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Parts Location INFOID:0000000003573788

JMBIA1108ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1)
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-62 2009 Murano

 COOLING FAN CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1109ZZ

D
1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front
E

H
JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2) I
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
J
: Vehicle front

JMBIA1114ZZ

N
1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front
O

Revision: 2008 October EC-63 2009 Murano

 COOLING FAN CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1112ZZ

1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
: Vehicle front

JMBIA1113ZZ

1. Refrigerant pressure sensor 2. Battery current sensor

: Vehicle front

JMBIA1115ZZ

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front

Revision: 2008 October EC-64 2009 Murano

 COOLING FAN CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1832GB

JMBIA1116ZZ I

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
J
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ N

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH) O
: Vehicle front

Revision: 2008 October EC-65 2009 Murano

 COOLING FAN CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1111ZZ

1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front

JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-66 2009 Murano

 COOLING FAN CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch A

4. SET/COAST switch 5. MAIN switch

EC

JMBIA1121ZZ

E
1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front
F

Component Description INFOID:0000000003387909

G
Component Reference
Camshaft position sensor (PHASE) EC-264, "Description"
H
Cooling fan motor EC-434, "Description"
Crankshaft position sensor (POS) EC-260, "Description"
Engine coolant temperature sensor EC-170, "Description" I
Refrigerant pressure sensor EC-463, "Description"

Revision: 2008 October EC-67 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]
ELECTRONIC CONTROLLED ENGINE MOUNT
System Diagram INFOID:0000000003387910

JMBIA1827GB

System Description INFOID:0000000003387911

INPUT/OUTPUT SIGNAL CHART

Sensor Input signal to ECM ECM function Actuator

Crankshaft position sensor (POS) Electronic controlled en-
Engine speed Engine mount
Camshaft position sensor (PHASE) gine mount control solenoid
control
Combination meter Vehicle speed* valve

*: This signal is sent to the ECM via the CAN communication line.

SYSTEM DESCRIPTION
The ECM controls the engine mount operation corresponding to the engine speed. The control system has a
2-step control [Soft/Hard]

Vehicle condition Engine mount control

Engine speed: Below 950 rpm Soft
Engine speed: Above 950 rpm Hard

ELECTRONIC CONTROLLED ENGINE MOUNT LINE DRAWING

Revision: 2008 October EC-68 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

L
JMBIA2161ZZ

1. Electronic controlled engine mount 2. Intake manifold collector M

control solenoid valve
: From next figure
N

Revision: 2008 October EC-69 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA2072ZZ

1. Front electronic controlled engine mount 2. Rear electronic controlled engine mount
: To previous figure

NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose.

Revision: 2008 October EC-70 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Parts Location INFOID:0000000003573789

EC

JMBIA1108ZZ

L
1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2 M
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
N
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
O
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1) P
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-71 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1109ZZ

1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front

JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2)
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
: Vehicle front

JMBIA1114ZZ

1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front

Revision: 2008 October EC-72 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1112ZZ

D
1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
E
: Vehicle front

JMBIA1113ZZ

I
1. Refrigerant pressure sensor 2. Battery current sensor
: Vehicle front
J

JMBIA1115ZZ
M

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front N

Revision: 2008 October EC-73 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1832GB

JMBIA1116ZZ

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH)
: Vehicle front

Revision: 2008 October EC-74 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1111ZZ

D
1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor E
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front
F

I
JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
J
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

N
1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-75 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch

4. SET/COAST switch 5. MAIN switch

JMBIA1121ZZ

1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front

Component Description INFOID:0000000003387913

Component Reference
Camshaft position sensor (PHASE) EC-264, "Description"
Crankshaft position sensor (POS) EC-260, "Description"
Electronic controlled engine mount control solenoid valve EC-441, "Description"

Revision: 2008 October EC-76 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
EVAPORATIVE EMISSION SYSTEM
A
System Diagram INFOID:0000000003387914

EC

JMBIA1828GB

G
System Description INFOID:0000000003387915

INPUT/OUTPUT SIGNAL CHART H

Sensor Input signal to ECM ECM function Actuator

Crankshaft position sensor (POS) I
Engine speed*1
Camshaft position sensor (PHASE) Piston position
Mass air flow sensor Amount of intake air
J
Engine coolant temperature sensor Engine coolant temperature
Density of oxygen in exhaust gas EVAP canister EVAP canister purge vol-
Air fuel ratio (A/F) sensor 1
(Mixture ratio feedback signal) purge flow control ume control solenoid valve K
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
L
Battery Battery voltage*1
Combination meter Vehicle speed*2
*1: ECM determines the start signal status by the signals of engine speed and battery voltage. M
*2: This signal is sent to the ECM via the CAN communication line.

Revision: 2008 October EC-77 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
SYSTEM DESCRIPTION

PBIB1631E

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.
EVAPORATIVE EMISSION LINE DRAWING

Revision: 2008 October EC-78 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

ALBIA0106ZZ
K

1. Intake manifold collector 2. EVAP canister purge volume control 3. EVAP service port
solenoid valve L
A. From EVAP canister
: Vehicle front
M

Revision: 2008 October EC-79 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1122ZZ

1. EVAP control system pressure sen- 2. EVAP canister vent control valve 3. EVAP canister
sor
A. To previous figure B. To/From B in this figure C. Refer to previous figure
: Vehicle front

NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.

Revision: 2008 October EC-80 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Parts Location INFOID:0000000003573791

EC

JMBIA1108ZZ

L
1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2 M
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
N
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
O
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1) P
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-81 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1109ZZ

1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front

JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2)
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
: Vehicle front

JMBIA1114ZZ

1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front

Revision: 2008 October EC-82 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1112ZZ

D
1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
E
: Vehicle front

JMBIA1113ZZ

I
1. Refrigerant pressure sensor 2. Battery current sensor
: Vehicle front
J

JMBIA1115ZZ
M

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front N

Revision: 2008 October EC-83 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1832GB

JMBIA1116ZZ

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH)
: Vehicle front

Revision: 2008 October EC-84 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1111ZZ

D
1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor E
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front
F

I
JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
J
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

N
1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-85 2009 Murano

 EVAPORATIVE EMISSION SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch

4. SET/COAST switch 5. MAIN switch

JMBIA1121ZZ

1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front

Component Description INFOID:0000000003387917

Component Reference
A/F sensor 1 EC-186, "Description"
Accelerator pedal position sensor EC-413, "Description"
Camshaft position sensor (PHASE) EC-264, "Description"
Crankshaft position sensor (POS) EC-260, "Description"
Engine coolant temperature sensor EC-170, "Description"
EVAP canister purge volume control solenoid valve EC-284, "Description"
EVAP control system pressure sensor EC-300, "Description"
Fuel tank temperature sensor EC-236, "Description"
Mass air flow sensor EC-154, "Description"
Throttle position sensor EC-175, "Description"

Revision: 2008 October EC-86 2009 Murano

 INTAKE VALVE TIMING CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]
INTAKE VALVE TIMING CONTROL
A
System Diagram INFOID:0000000003387918

EC

D
JMBIA1830GB

System Description INFOID:0000000003387919

E

INPUT/OUTPUT SIGNAL CHART

F
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed and piston position G
Camshaft position sensor (PHASE)
Intake valve Intake valve timing control
Engine oil temperature sensor Engine oil temperature
timing control solenoid valve
Engine coolant temperature sensor Engine coolant temperature H
Combination meter Vehicle speed*
*: This signal is sent to the ECM via the CAN communication line
I
SYSTEM DESCRIPTION

N
JMBIA0060GB

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve. O
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing (IVT) control sole-
noid valve depending on driving status. This makes it possible to control the shut/open timing of the intake P
valve to increase engine torque in low/mid speed range and output in high-speed range.

Revision: 2008 October EC-87 2009 Murano

 INTAKE VALVE TIMING CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Parts Location INFOID:0000000003573792

JMBIA1108ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1)
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-88 2009 Murano

 INTAKE VALVE TIMING CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1109ZZ

D
1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front
E

H
JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2) I
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
J
: Vehicle front

JMBIA1114ZZ

N
1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front
O

Revision: 2008 October EC-89 2009 Murano

 INTAKE VALVE TIMING CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1112ZZ

1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
: Vehicle front

JMBIA1113ZZ

1. Refrigerant pressure sensor 2. Battery current sensor

: Vehicle front

JMBIA1115ZZ

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front

Revision: 2008 October EC-90 2009 Murano

 INTAKE VALVE TIMING CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1832GB

JMBIA1116ZZ I

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
J
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ N

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH) O
: Vehicle front

Revision: 2008 October EC-91 2009 Murano

 INTAKE VALVE TIMING CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1111ZZ

1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front

JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-92 2009 Murano

 INTAKE VALVE TIMING CONTROL
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch A

4. SET/COAST switch 5. MAIN switch

EC

JMBIA1121ZZ

E
1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front
F

Component Description INFOID:0000000003387921

G
Component Reference
Camshaft position sensor (PHASE) EC-264, "Description"
H
Crankshaft position sensor (POS) EC-260, "Description"
Engine coolant temperature sensor EC-170, "Description"
Engine oil temperature sensor EC-242, "Description" I
Intake valve timing control solenoid valve EC-151, "Description"

Revision: 2008 October EC-93 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
VARIABLE INDUCTION AIR SYSTEM
System Diagram INFOID:0000000003387922

JMBIA1831GB

System Description INFOID:0000000003387923

INPUT/OUTPUT SIGNAL CHART

Sensor Input signal to ECM ECM function Actuator

Crankshaft position sensor (POS)
Engine speed*
Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature VIAS control solenoid valve 1
VIAS control
VIAS control solenoid valve 2
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*
*: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTION

JMBIA0181GB

In the medium speed range, the ECM sends the ON signal to the VIAS control solenoid valve. This signal
introduces the intake manifold vacuum into the power valve actuator and therefore closes the power valve.

Revision: 2008 October EC-94 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Under this condition, the pressure waves of the exhaust stroke do not disturb the pressure waves of the intake
stroke of each opposite bank. Therefore, charging efficiency is increased together with the effect of the long A
intake passage.
However, in the high speed range, the ECM sends the OFF signal to the VIAS control solenoid valve and the
power valve is opened. Under this condition, the pressure waves of intake stroke are resonant with those of
EC
each opposite bank exhaust stroke. Therefore, charging efficiency is also increased.
In addition, both valves 1 and 2 are opened or closed in other ranges mentioned above. Thus maximum
charging efficiency is obtained for the various driving conditions.
C
VACUUM HOSE DRAWING

O
JMBIA0172ZZ

1. Power valve actuator 1 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
P
4. Power valve actuator 2 5. Intake manifold collector

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 VARIABLE INDUCTION AIR SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Component Parts Location INFOID:0000000003573795

JMBIA1108ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Electronic controlled engine mount
valve (bank 1) valve (bank 2) control solenoid valve
4. Fuel injector (bank 2) 5. A/F sensor 1 (bank 2) 6. Cooling fan motor-2
7. Ignition coil (with power transistor) 8. Camshaft position sensor (PHASE) 9. Crankshaft position sensor (POS)
and spark plug (bank 2) (bank 2)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air 17. Electric throttle control actuator 18. EVAP service port
temperature sensor)
19. Power valve actuator 2 20. EVAP canister purge volume control 21. Camshaft position sensor (PHASE)
solenoid valve (bank 1)
22. Ignition coil (with power transistor) 23. A/F sensor 1 (bank 1) 24. Fuel injector (bank 1)
and spark plug (bank 1)
25. VIAS control solenoid valve 1 and 2 26. Power valve actuator 1

Revision: 2008 October EC-96 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1109ZZ

D
1. Mas air flow sensor (with intake air 2. Electric throttle control actuator
temperature sensor)
: Vehicle front
E

H
JMBIA1110ZZ

1. Ignition coil (with power transistor) 2. Fuel injector (bank 1) 3. Fuel injector (bank 2) I
and spark plug (bank 1)
4. Ignition coil (with power transistor) 5. Knock sensor (bank 2) 6. Knock sensor (bank 1)
and spark plug (bank 2)
J
: Vehicle front

JMBIA1114ZZ

N
1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE) 3. Camshaft position sensor (PHASE)
(bank 1) (bank 2)
: Vehicle front
O

Revision: 2008 October EC-97 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1112ZZ

1. Cooling fan motor-1 2. Cooling fan motor-1 harness con- 3. Cooling fan motor-1 harness con-
nector nector
4. Cooling fan motor-2 5. Engine coolant temperature sensor
: Vehicle front

JMBIA1113ZZ

1. Refrigerant pressure sensor 2. Battery current sensor

: Vehicle front

JMBIA1115ZZ

1. ECM 2. IPDM E/R 3. Fuel pump fuse

: Vehicle front

Revision: 2008 October EC-98 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

JMBIA1832GB

JMBIA1116ZZ I

1. A/F sensor 1 (bank 1) harness con- 2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector nector
J
4. A/F sensor 1 (bank 2)
: Vehicle front

JMBIA1117ZZ N

1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector

4. HO2S2 (bank 1) harness connector 5. Power steering pressure sensor 6. Drive shaft (RH) O
: Vehicle front

Revision: 2008 October EC-99 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1111ZZ

1. Electronic controlled engine mount 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
control solenoid valve
4. EVAP canister purge volume control 5. EVAP service port 6. EVAP control system pressure sen-
solenoid valve sor
7. EVAP canister vent control valve 8. EVAP canister
: Vehicle front

JMBIA1118ZZ

1. Intake valve timing control solenoid 2. Intake valve timing control solenoid 3. Data link connector
valve (bank 1) valve (bank 2)

JMBIA1119ZZ

1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor

JMBIA1120ZZ

Revision: 2008 October EC-100 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

1. ASCD steering switch 2. CANSEL switch 3. RESUME/ACCELERATE switch A

4. SET/COAST switch 5. MAIN switch

EC

JMBIA1121ZZ

E
1. Fuel level sensor unit and fuel pump 2. Fuel level sensor unit and fuel pump 3. Fuel pressure regulator
harness connector
: Vehicle front
F

Component Description INFOID:0000000003387925

G
Component Reference
Accelerator pedal position sensor EC-413, "Description"
H
Camshaft position sensor (PHASE) EC-264, "Description"
Crankshaft position sensor (POS) EC-260, "Description"
Engine coolant temperature sensor EC-170, "Description" I
Mass air flow sensor EC-154, "Description"
Power valve 1 and 2 EC-466, "Description"
J
Throttle position sensor EC-175, "Description"
VIAS control solenoid valve 1 EC-393, "Description"
VIAS control solenoid valve 2 EC-396, "Description" K

Revision: 2008 October EC-101 2009 Murano

 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Diagnosis Description INFOID:0000000003387926

INTRODUCTION
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:

Emission-related diagnostic information Diagnostic service

Diagnostic Trouble Code (DTC) Service $03 of SAE J1979
Freeze Frame data Service $02 of SAE J1979
System Readiness Test (SRT) code Service $01 of SAE J1979
1st Trip Diagnostic Trouble Code (1st Trip DTC) Service $07 of SAE J1979
1st Trip Freeze Frame data
Test values and Test limits Service $06 of SAE J1979
Calibration ID Service $09 of SAE J1979
The above information can be checked using procedures listed in the table below.
: Applicable : Not applicable

Freeze 1st trip Freeze

DTC 1st trip DTC SRT code SRT status Test value
Frame data Frame data
CONSULT-III
GST
ECM *
*: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
The malfunction indicator lamp (MIL) on the instrument panel illuminates 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-517, "Fail-safe".)
TWO TRIP DETECTION LOGIC
When a malfunction is detected for the 1st time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MIL will not illuminate at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MIL illuminates. The MIL illuminates 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 per-
formed during vehicle operation. Specific on board diagnostic items will cause the ECM to illuminate or blink
the MIL, and store DTC and Freeze Frame data, even in the 1st trip, as shown below.
: Applicable : Not applicable

MIL DTC 1st trip DTC

Items 1st trip 2nd trip 2nd trip

1st trip 2nd trip 1st trip
display-
Blinking illuminate Blinking illuminate displaying displaying displaying
ing
Misfire (Possible three way catalyst
damage) DTC: P0300 - P0306 is
being detected
Misfire (Possible three way catalyst
damage) DTC: P0300 - P0306 is
being detected
One trip detection diagnoses (Re-

fer to EC-521, "DTC Index".)
Except above

DTC AND FREEZE FRAME DATA

DTC and 1st Trip DTC

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previously, and the 1st trip DTC did not recur, the 1st trip DTC A
will not be displayed.
If a malfunction is detected during the 1st trip, the 1st trip DTC is saved in the ECM memory. The MIL will not
illuminate (two trip detection logic). If the same malfunction is not detected in the 2nd trip (meeting the required
EC
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 MIL illuminates. In other
words, the DTC is stored in the ECM memory and the MIL illuminates when the same malfunction occurs in
two consecutive trips. If a 1st trip DTC is saved and a non-diagnostic operation is performed between the 1st C
and 2nd trips, only the 1st trip DTC will continue to be stored. For malfunctions that blink or illuminate the MIL
during the 1st trip, the DTC and 1st trip DTC are stored in the ECM memory.
Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in How to Erase D
DTC and 1st Trip DTC.
For malfunctions in which 1st trip DTCs are displayed, refer to EC-521, "DTC Index". 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-III. E
1st trip DTC is specified in Service $07 of SAE J1979. 1st trip DTC detection occurs without illuminating the
MIL and therefore does not warn the driver of a malfunction. However, 1st trip DTC detection will not prevent
the vehicle from being tested, for example during Inspection/Maintenance (I/M) tests. F
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 2, refer to EC-8, "Work Flow". Then perform DTC Confirmation
Procedure or Component Function Check to try to duplicate the malfunction. If the malfunction is duplicated,
the item requires repair. G
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 tem-
perature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, absolute throttle position, base H
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-III or I
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-III screen, not on the GST.
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 J
freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data. K

Priority Items
Freeze frame data Misfire DTC: P0300 - P0306 L
1
Fuel Injection System Function DTC: P0171, P0172, P0174, P0175
2 Except the above items (Includes CVT related items)
3 1st trip freeze frame data M
For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was saved 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 different mal- N
function 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 O
frame data with the same priority occurs later, the first (original) freeze frame data remains unchanged in the
ECM memory.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM mem-
ory is erased. Procedures for clearing the ECM memory are described in How to Erase DTC and 1st Trip P
DTC.
How to Read DTC and 1st Trip DTC
With CONSULT-III
CONSULT-III displays the DTC in SELF DIAGNOSTIC RESULT mode. Examples: P0340, P0850, P1148,
etc.
These DTCs are prescribed by SAE J2012.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
(CONSULT-III also displays the malfunctioning component or system.)
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].
With GST
GST (Generic Scan Tool) displays the DTC in Diagnostic Service $03. Examples: P0340, P0850, P1148, etc.
These DTCs are prescribed by SAE J2012.
1st trip DTC is displayed in Diagnostic Service $07.
No Tools
The number of blinks of the MIL in the Diagnostic Test Mode II (Self-Diagnostic Results) indicates the DTC.
Example: 0340, 0850, 1148, 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 and the Diagnostic Test Mode II do not indi-
cate whether the malfunction is still occurring or has occurred in the past and has returned to nor-
mal. CONSULT-III can identify malfunction status as shown below. Therefore, using CONSULT-III (if
available) is recommended.
How to Erase DTC and 1st Trip DTC
With CONSULT-III
NOTE:
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.
If the DTC is not for CVT related items (see EC-521), skip step 1.
1. Erase DTC in TCM. Refer to TM-32, "Diagnosis Description".
2. Select ENGINE with CONSULT-III.
3. Select SELF-DIAG RESULTS.
4. Touch ERASE. (DTC in ECM will be erased.)
WITH GST
NOTE:
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.
Select Service $04 with GST (Generic Scan Tool).
No Tools
NOTE:
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.
Erase DTC in ECM. Refer to How to Erase Diagnostic Test Mode II (Self-diagnostic Results).
If the battery is disconnected, the emission-related diagnostic information will be cleared within 24
hours.
The following data are 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
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.
SYSTEM READINESS TEST (SRT) CODE
System Readiness Test (SRT) code is specified in Service $01 of SAE J1979.
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 com-
ponents. 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.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
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. A
NOTE:
The SRT will also indicate INCMP if the self-diagnosis memory is erased for any reason or if the ECM mem-
ory power supply is interrupted for several hours.
EC
If, during the state emissions inspection, the SRT indicates CMPLT for all test items, the inspector will con-
tinue with the emissions test. However, if the SRT indicates INCMP for one or more of the SRT items the
vehicle is returned to the customer untested.
NOTE: C
If MIL is ON during the state emissions inspection, the vehicle is also returned to the customer untested even
though the SRT indicates CMPLT for all test items. Therefore, it is important to check SRT (CMPLT) and
DTC (No DTCs) before the inspection. D
SRT Item
The table below shows required self-diagnostic items to set the SRT to CMPLT.
E
SRT item Performance Corresponding
Required self-diagnostic items to set the SRT to CMPLT
(CONSULT-III indication) Priority* DTC No.
CATALYST 2 Three way catalyst function P0420, P0430
F
EVAP SYSTEM 2 EVAP control system purge flow monitoring P0441
1 EVAP control system P0442
2 EVAP control system P0456 G
HO2S 2 Air fuel ratio (A/F) sensor 1 P0133, P0153
Heated oxygen sensor 2 P0137, P0157
H
Heated oxygen sensor 2 P0138, P0158
Heated oxygen sensor 2 P0139, P0159
*: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for I
models with CONSULT-III.

SRT Set Timing

SRT is set as CMPLT after self-diagnosis has been performed one or more times. Completion of SRT is J
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.
K
Example
Self-diagnosis result Ignition cycle
Diagnosis
ON OFF ON OFF ON OFF ON L
All OK Case 1 P0400 OK (1) (1) OK (2) (2)
P0402 OK (1) (1) (1) OK (2)
P1402 OK (1) OK (2) (2) (2) M
SRT of EGR CMPLT CMPLT CMPLT CMPLT
Case 2 P0400 OK (1) (1) (1) (1)
N
P0402 (0) (0) OK (1) (1)
P1402 OK (1) OK (2) (2) (2)
SRT of EGR INCMP INCMP CMPLT CMPLT O
NG exists Case 3 P0400 OK OK
P0402
P
NG
P1402 NG NG (Consecutive
NG)
(1st trip) DTC
1st trip DTC 1st trip DTC
DTC (= MIL ON)
SRT of EGR INCMP INCMP INCMP CMPLT
OK: Self-diagnosis is carried out and the result is OK.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
NG: Self-diagnosis is carried out and the result is NG.
: Self-diagnosis is not carried out.
When all SRT related self-diagnoses show OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will
indicate CMPLT. Case 1 above
When all SRT related self-diagnoses show OK results through several different cycles, the SRT will indicate
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 show 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 the number one (1)
for each self-diagnosis (Case 1 & 2) or the number 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.
During SRT driving pattern, the 1st trip DTC (NG) is detected prior to CMPLT of SRT and the self-diagnosis
memory must be erased from the 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.

Revision: 2008 October EC-106 2009 Murano

 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

EC

L
JMBIA1575GB

How to Display SRT Status M

WITH CONSULT-III
Selecting SRT STATUS in DTC CONFIRMATION mode with CONSULT-III.
For items whose SRT codes are set, CMPLT is displayed on the CONSULT-III screen; for items whose SRT
codes are not set, INCMP is displayed. N
NOTE:
Though displayed on the CONSULT-III screen, HO2S HTR is not SRT item.
WITH GST O
Selecting Service $01 with GST (Generic Scan Tool)
NO TOOLS
A SRT code itself cannot be displayed, however SRT status can. P
1. Turn ignition switch ON and wait 20 seconds.
2. SRT status is indicated as shown below.
When all SRT codes are set, MIL illuminates continuously.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
When any SRT codes are not set, MIL will blink periodically for 10 seconds.

JMBIA1515GB

MALFUNCTION INDICATOR LAMP (MIL)

Description
The MIL is located on the instrument panel.
1. The MIL will illuminate when the ignition switch is turned ON
without the engine running. This is a bulb check.
If the MIL does not illuminate, check MIL circuit. Refer to EC-
456, "Component Function Check".
2. When the engine is started, the MIL should turn off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.

SEF217U

On Board Diagnostic System Function

The on board diagnostic system has the following three functions.

Revision: 2008 October EC-108 2009 Murano

 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

Diagnostic Test KEY and ENG. Function Explanation of Function A

Mode Status
Mode I Ignition switch in BULB CHECK This function checks the MIL bulb for damage (blown, open
ON position circuit, etc.).
EC
If the MIL does not illuminate, check MIL circuit.

Engine stopped C

D
Engine running MALFUNCTION When a malfunction is detected twice in two consecutive
WARNING driving cycles (two trip detection logic), the MIL will illumi-
nate to inform the driver that a malfunction has been detect-
ed.
E
The following malfunctions will illuminate or blink the MIL in
the 1st trip.
Misfire (Possible three way catalyst damage)
F
One trip detection diagnoses
Mode II Ignition switch in SELF-DIAGNOSTIC This function allows DTCs and 1st trip DTCs to be read.
ON position RESULTS
G

Engine stopped H

I
Diagnostic Test Mode I Bulb Check
In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check MIL circuit. Refer to
EC-456, "Component Function Check". J
Diagnostic Test Mode I Malfunction Warning

MIL Condition K
ON When the malfunction is detected.
OFF No malfunction.
L
This DTC number is 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 MIL as shown below. M
The DTC and 1st trip DTC are displayed at the same time. If the MIL 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 MIL
illuminates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are
N
displayed, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These uniden-

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
tified codes can be identified by using the CONSULT-III or GST. A DTC will be used as an example for how to
read a code.

JMBIA1140GB

A particular trouble code can be identified by the number of four-digit numeral blinks as per the following.

Number 0 1 2 3 4 5 6 7 8 9 A B C D E F
Blinks 10 1 2 3 4 5 6 7 8 9 11 12 13 14 15 16
The length of time the 1,000th-digit numeral flashes on and off is 1.2 seconds consisting of an ON (0.6-sec-
onds) - OFF (0.6-seconds) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-seconds ON and 0.3-seconds 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-seconds OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-
function. (See EC-521, "DTC Index")
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.
ECM always returns to Diagnostic Test Mode I after the 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 5 times within 5 seconds.
- Fully depress the accelerator pedal.
- Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it depressed for approx. 10 seconds until the
MIL starts blinking.
4. Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).
NOTE:

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Wait until the same DTC (or 1st trip DTC) appears to completely confirm all DTCs.
A

EC

PBIB0092E

HOW TO ERASE DIAGNOSTIC TEST MODE II (SELF-DIAGNOSTIC RESULTS) D

1. Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to How to Set Diagnostic Test Mode II
(Self-diagnostic Results).
2. Fully depress the accelerator pedal and keep it depressed for more than 10 seconds.
The emission-related diagnostic information has been erased from the backup memory in the ECM. E
3. Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.
If the battery is disconnected, the DTC will be lost from the backup memory within 24 hours.
Do not erase the stored memory before starting trouble diagnoses. F
OBD System Operation Chart
Relationship Between MIL, 1st Trip DTC, DTC, and Detectable Items
G
When a malfunction is detected for the 1st 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 MIL will come on. H
The MIL will turn off after the vehicle is driven 3 times (driving pattern B) with no malfunction. A 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. I
The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A) with-
out the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel Injec-
tion 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 CON- J
SULT-III 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 K

Items Fuel Injection System Misfire Other

L
MIL (turns 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)
M
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)
N
For details about patterns B and C under Fuel Injection System and Misfire, see EXPLANATION FOR DRIVING PATTERNS FOR
MISFIRE <EXHAUST QUALITY DETERIORATION>, FUEL INJECTION SYSTEM.
For details about patterns A and B under Other, see EXPLANATION FOR DRIVING PATTERNS FOR MISFIRE <EXHAUST QUALITY
O
DETERIORATION>, FUEL INJECTION SYSTEM.
*1: Clear timing is at the moment OK is detected.
*2: Clear timing is when the same malfunction is detected in the 2nd trip.
P
Relationship Between MIL, DTC, 1st Trip DTC and Driving Patterns for Misfire <Exhaust Quality Deterioration>,
Fuel Injection System

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1417GB

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

Explanation for Driving Patterns for Misfire <Exhaust Quality Deterioration>, Fuel Injection System
<Driving Pattern B>
Driving pattern B means the vehicle operation as per the following:
All components and systems should be monitored at least once by the OBD system.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
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. A
The MIL will turn off when the B counter reaches 3. (*2 in OBD SYSTEM OPERATION CHART)
<Driving Pattern C>
Driving pattern C means operating vehicle as per the following:
EC
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: C
When the freeze frame data shows lower than 70C (158F), T should be lower than 70C (158F).
When the freeze frame data shows higher than or equal to 70C (158F), T should be higher than or equal to
70C (158F). D
Example:
If the stored freeze frame data is as per the following:
Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80C (176F)
To be satisfied with driving pattern C, the vehicle should run under the following conditions: E
Engine speed: 475 - 1,225 rpm, Calculated load value: 27 - 33%, Engine coolant temperature: more than 70C
(158F)
The C counter will be cleared when the malfunction is detected regardless of vehicle conditions above. F
The C counter will be counted up when vehicle conditions above are 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. G
Relationship Between MIL, DTC, 1st Trip DTC and Driving Patterns Except For Misfire <Exhaust Quality Deteriora-
tion>, Fuel Injection System
H

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

JMBIA1418GB

*1: When the same malfunction is de- *2: MIL will turn off after vehicle is driven *3: When the same malfunction is de-
tected in two consecutive trips, MIL 3 times (pattern B) without any mal- tected in two consecutive trips, the
will illuminate. functions. DTC and the freeze frame data will be
stored in ECM.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
*4: The DTC and the freeze frame data *5: When a malfunction is detected for *6: 1st trip DTC will be cleared after vehi-
will not be displayed any longer after the 1st time, the 1st trip DTC and the cle is driven once (pattern B) without A
vehicle is driven 40 times (pattern A) 1st trip freeze frame data will be the same malfunction.
without the same malfunction. stored in ECM.
(The DTC and the freeze frame data
still remain in ECM.) EC
*7: When the same malfunction is de-
tected in the 2nd trip, the 1st trip
freeze frame data will be cleared. C
Explanation for Driving Patterns Except for Misfire <Exhaust Quality Deterioration>, Fuel Injection System
<Driving Pattern A>
D

JMBIA1920GB I
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.
J
<Driving Pattern B>
Driving pattern B means operating vehicle as per the following:
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. K
The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
The MIL will turn off when the B counter reaches 3 (*2 in OBD SYSTEM OPERATION CHART).
CONSULT-III Function INFOID:0000000003387927
L

FUNCTION
M
Diagnostic test mode Function
This mode enables a technician to adjust some devices faster and more accurately by following the in-
Work Support N
dications on the CONSULT-III unit.
Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
Self Diagnostic Result
can be read and erased quickly.*
Data Monitor Input/Output data in the ECM can be read. O
Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the ECM and also shifts
Active Test
some parameters in a specified range.
DTC & SRT Confirmation The status of system monitoring tests and the self-diagnosis status/results can be confirmed.
P

Function Test This mode is used to inform customers when the vehicle requires periodic maintenance.
ECU Part Number ECM part number can be read.
*: 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

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
1st trip freeze frame data
System readiness test (SRT) codes
Test values

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

DIAGNOSTIC TEST MODE

SELF-DIAGNOSTIC DTC & SRT
RESULTS CONFIRMATION
Item DATA
WORK ACTIVE DTC
FREEZE MONI-
SUPPORT TEST SRT STA- WORK
DTC*1 FRAME TOR
TUS SUP-
DATA*2
PORT
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Mass air flow sensor
Engine coolant temperature sensor
Engine oil temperature sensor
Air fuel ratio (A/F) sensor 1
Heated oxygen sensor 2
Vehicle speed signal
Accelerator pedal position sensor
ENGINE CONTROL COMPONENT PARTS

Throttle position sensor

Fuel tank temperature sensor
EVAP control system pressure sensor
Intake air temperature sensor
INPUT

Knock sensor
Refrigerant pressure sensor
Closed throttle position switch (accel-

erator pedal position sensor signal)
Air conditioner switch
Park/neutral position (PNP) signal
Stop lamp switch
Power steering pressure sensor
Battery voltage
Load signal
Primary speed sensor
Fuel level sensor
Battery current sensor
ASCD steering switch
ASCD brake switch

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
DIAGNOSTIC TEST MODE
A
SELF-DIAGNOSTIC DTC & SRT
RESULTS CONFIRMATION
Item DATA
WORK ACTIVE DTC
FREEZE MONI-
SUPPORT TEST SRT STA- WORK EC
DTC*1 FRAME TOR
TUS SUP-
DATA*2
PORT
Fuel injector C
Power transistor (Ignition timing)
Throttle control motor relay
D
Throttle control motor
ENGINE CONTROL COMPONENT PARTS

EVAP canister purge volume control

solenoid valve
E
Air conditioner relay
Fuel pump relay
Cooling fan relay F
OUTPUT

Air fuel ratio (A/F) sensor 1 heater * 3

Heated oxygen sensor 2 heater *3

G
EVAP canister vent control valve
Intake valve timing control solenoid

valve H
VIAS control solenoid valve 1
VIAS control solenoid valve 2
Electronic controlled engine mount I
Alternator
Calculated load value
J
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-III screen in freeze frame data K
mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-102, "Diagnosis Description".
*3: Always CMPLT is displayed.

WORK SUPPORT MODE L

Work Item

WORK ITEM CONDITION USAGE M

FUEL PRESSURE RELEASE FUEL PUMP WILL STOP BY TOUCHING START DUR- When releasing fuel pressure from
ING IDLING. fuel line
CRANK A FEW TIMES AFTER ENGINE STALLS. N
IDLE AIR VOL LEARN THE IDLE AIR VOLUME THAT KEEPS THE ENGINE When learning the idle air volume
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM. O
SELF-LEARNING CONT THE COEFFICIENT OF SELF-LEARNING CONTROL When clearing mixture ratio self-
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF- learning value
FICIENT.
P

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
WORK ITEM CONDITION USAGE
EVAP SYSTEM CLOSE CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN When detecting EVAP vapor leak-
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE age in the EVAP system
FOLLOWING CONDITIONS.
IGN SW ON
ENGINE NOT RUNNING
AMBIENT TEMPERATURE IS ABOVE 0C (32F).
NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-
TEM
FUEL TANK TEMP. IS MORE THAN 0C (32F).
WITHIN 10 MINUTES AFTER STARTING EVAP SYS-
TEM CLOSE
WHEN TRYING TO EXECUTE EVAP SYSTEM CLOSE
UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
III WILL DISCONTINUE IT AND DISPLAY APPROPRI-
ATE INSTRUCTION.
NOTE:
WHEN STARTING ENGINE, CONSULT-III MAY DIS-
PLAY BATTERY VOLTAGE IS LOW. CHARGE BAT-
TERY, EVEN WHEN USING A CHARGED BATTERY.
VIN REGISTRATION IN THIS MODE, VIN IS REGISTERED IN ECM. When registering VIN in ECM
TARGET IDLE RPM ADJ* IDLE CONDITION When setting target idle speed
TARGET IGN TIM ADJ* IDLE CONDITION When adjusting target ignition tim-
ing
*: 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-521, "DTC Index".
Freeze Frame Data and 1st Trip Freeze Frame Data

Freeze frame data item* Description

DIAG TROUBLE CODE The engine control component part/control system has a trouble code that is displayed as PXXXX. (Refer
[PXXXX] to EC-521, "DTC Index".)
FUEL SYS-B1 Fuel injection system status at the moment a malfunction is detected is displayed.
One of the following mode is displayed.
Mode2: Open loop due to detected system malfunction
FUEL SYS-B2 Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode5: 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 TRM-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 schedule
L-FUEL TRM-B2 [%] than short-term fuel trim.
S-FUEL TRM-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
S-FUEL TRM-B2 [%] schedule.
ENGINE SPEED [rpm] The engine speed at the moment a malfunction is detected is displayed.
VEHICL SPEED
The vehicle speed at the moment a malfunction is detected is displayed.
[km/h] or [mph]
ABSOL THP/S [%] The throttle valve opening angle at the moment a malfunction is detected is displayed.
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]

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Freeze frame data item* Description
A
INT MANI PRES [kPa]
These items are displayed but are not applicable to this model.
COMBUST CONDITION
*: The items are the same as those of 1st trip freeze frame data. EC
DATA MONITOR MODE
Monitored Item
C
: Applicable
Monitored item Unit Description Remarks
Accuracy becomes poor if engine D
Indicates the engine speed computed from the speed drops below the idle rpm.
ENG SPEED rpm signal of the crankshaft position sensor (POS) If the signal is interrupted while the
and camshaft position sensor (PHASE). engine is running, an abnormal value
may be indicated. E
When the engine is stopped, a certain
The signal voltage of the mass air flow sensor is value is indicated.
MAS A/F SE-B1 V
displayed. When engine is running, specification
F
range is indicated in SPEC.
Base fuel schedule indicates the fuel injection
When engine is running, specification
B/FUEL SCHDL msec pulse width programmed into ECM, prior to any
range is indicated in SPEC. G
learned on board correction.
A/F ALPHA-B1 When the engine is stopped, a certain
value is indicated.
The mean value of the air-fuel ratio feedback cor- This data also includes the data for H
%
A/F ALPHA-B2 rection factor per cycle is indicated. the air-fuel ratio learning control.
When engine is running, specification
range is indicated in SPEC.
I
When the engine coolant temperature
The engine coolant temperature (determined by sensor is open or short-circuited,
COOLAN TEMP/S C or F the signal voltage of the engine coolant tempera- ECM enters fail-safe mode. The en-
ture sensor) is displayed. gine coolant temperature determined J
by the ECM is displayed.
A/F SEN1 (B1) The A/F signal computed from the input signal of
V
A/F SEN1 (B2) the air fuel ratio (A/F) sensor 1 is displayed. K
HO2S2 (B1) The signal voltage of the heated oxygen sensor 2
V
HO2S2 (B2) is displayed.
L
HO2S2 MNTR(B1) Display of heated oxygen sensor 2 signal:
RICH: means the amount of oxygen after three
When the engine is stopped, a certain
RICH/LEAN way catalyst is relatively small.
HO2S2 MNTR(B2) value is indicated.
LEAN: means the amount of oxygen after three M
way catalyst is relatively large.
The vehicle speed computed from the vehicle
VHCL SPEED SE km/h or mph speed signal sent from combination meter is dis-
N
played.
BATTERY VOLT V The power supply voltage of ECM is displayed.
ACCEL SEN 1 ACCEL SEN 2 signal is converted by O
The accelerator pedal position sensor signal volt-
V ECM internally. Thus, it differs from
ACCEL SEN 2 age is displayed.
ECM terminal voltage signal.
TP SEN 1-B1 TP SEN 2-B1 signal is converted by
V
The throttle position sensor signal voltage is dis-
ECM internally. Thus, it differs from
P
TP SEN 2-B1 played.
ECM terminal voltage signal.
The fuel temperature (determined by the signal
FUEL T/TMP SE C or F voltage of the fuel tank temperature sensor) is
displayed.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Monitored item Unit Description Remarks
The intake air temperature (determined by the
INT/A TEMP SE C or F signal voltage of the intake air temperature sen-
sor) is indicated.
The signal voltage of EVAP control system pres-
EVAP SYS PRES V
sure sensor is displayed.
The signal voltage of the fuel level sensor is dis-
FUEL LEVEL SE V
played.
Indicates start signal status [ON/OFF] computed After starting the engine, [OFF] is dis-
START SIGNAL ON/OFF by the ECM according to the signals of engine played regardless of the starter sig-
speed and battery voltage. nal.
Indicates idle position [ON/OFF] computed by
CLSD THL POS ON/OFF ECM according to the accelerator pedal position
sensor signal.
Indicates [ON/OFF] condition of the air condition-
AIR COND SIG ON/OFF er switch as determined by the air conditioner sig-
nal.
Indicates [ON/OFF] condition from the park/neu-
P/N POSI SW ON/OFF
tral position (PNP) signal.
[ON/OFF] condition of the power steering system
PW/ST SIGNAL ON/OFF (determined by the signal voltage of the power
steering pressure sensor) is indicated.
Indicates [ON/OFF] condition from the electrical
load signal.
ON: Rear window defogger switch is ON and/or
LOAD SIGNAL ON/OFF
lighting switch is in 2nd position.
OFF: Both rear window defogger switch and light-
ing switch are OFF.
Indicates [ON/OFF] condition from ignition switch
IGNITION SW ON/OFF
signal.
Indicates [ON/OFF] condition from the heater fan
HEATER FAN SW ON/OFF
switch signal.
Indicates [ON/OFF] condition from the stop lamp
BRAKE SW ON/OFF
switch signal.
INJ PULSE-B1 Indicates the actual fuel injection pulse width
When the engine is stopped, a certain
msec compensated by ECM according to the input sig-
INJ PULSE-B2 computed value is indicated.
nals.
Indicates the ignition timing computed by ECM When the engine is stopped, a certain
IGN TIMING BTDC
according to the input signals. value is indicated.
Calculated load value indicates the value of the
CAL/LD VALUE %
current air flow divided by peak air flow.
Indicates the mass air flow computed by ECM ac-
MASS AIRFLOW gm/s cording to the signal voltage of the mass air flow
sensor.
Indicates the EVAP canister purge volume con-
trol solenoid valve control value computed by the
PURG VOL C/V % ECM according to the input signals.
The opening becomes larger as the value in-
creases.
INT/V TIM (B1) Indicates [CA] of intake camshaft advance an-
CA
INT/V TIM (B2) gle.

INT/V SOL-B1 The control value of the intake valve timing con-
trol solenoid valve (determined by ECM accord-
ing to the input signals) is indicated.
INT/V SOL-B2 %
The advance angle becomes larger as the value
increases.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Monitored item Unit Description Remarks
A
The control condition of the VIAS control solenoid
valve 1 (determined by ECM according to the in-
put signals) is indicated.
VIAS S/V-1 ON/OFF
ON: VIAS control solenoid valve 1 is operating. EC
OFF: VIAS control solenoid valve 1 is not operat-
ing.
The control condition of the VIAS control solenoid
valve 2 (determined by ECM according to the in-
C
put signals) is indicated.
VIAS S/V-2 ON/OFF
ON: VIAS control solenoid valve 2 is operating.
OFF: VIAS control solenoid valve 2 is not operat- D
ing.
The air conditioner relay control condition (deter-
AIR COND RLY ON/OFF mined by ECM according to the input signals) is
indicated. E
The control condition of the electronic controlled
engine mount (determined by ECM according to
ENGINE MOUNT IDLE/TRVL the input signals) is indicated. F
IDLE: Engine speed is below 950 rpm
TRVL: Engine speed is above 950 rpm
Indicates the fuel pump relay control condition G
FUEL PUMP RLY ON/OFF determined by ECM according to the input sig-
nals.
The control condition of the EVAP canister vent
control valve (determined by ECM according to
H
VENT CONT/V ON/OFF the input signals) is indicated.
ON: Closed
OFF: Open
I
Indicates the throttle control motor relay control
THRTL RELAY ON/OFF condition determined by the ECM according to
the input signals.
J
The control condition of the cooling fan (deter-
mined by ECM according to the input signals) is
indicated.
HI/MID/LOW/
COOLING FAN HI: High speed operation K
OFF
MID: Middle speed operation
LOW: Low speed operation
OFF: Stop
L
HO2S2 HTR (B1) Indicates [ON/OFF] condition of heated oxygen
ON/OFF sensor 2 heater determined by ECM according to
HO2S2 HTR (B2) the input signals.
Indicates the engine speed computed from the M
I/P PULLY SPD rpm
turbine revolution sensor signal.
The vehicle speed computed from the vehicle
VEHICLE SPEED km/h or mph
speed signal sent from TCM is displayed. N
Displays the condition of idle air volume learning
YET: Idle Air Volume Learning has not been per-
IDL A/V LEARN YET/CMPLT formed yet. O
CMPLT: Idle Air Volume Learning has already
been performed successfully.
The engine oil temperature (determined by the
ENG OIL TEMP C or F signal voltage of the engine oil temperature sen- P
sor) is displayed.
TRVL AFTER MIL km or mile Distance traveled while MIL is activated.
A/F S1 HTR(B1) Air fuel ratio (A/F) sensor 1 heater control value
computed by ECM according to the input signals.
%
A/F S1 HTR(B2) The current flow to the heater becomes larger as
the value increases.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Monitored item Unit Description Remarks
The signal voltage from the refrigerant pressure
AC PRESS SEN V
sensor is displayed.
The vehicle speed computed from the vehicle
VHCL SPEED SE km/h or mph speed signal sent from combination meter is dis-
played.
SET VHCL SPD km/h or mph The preset vehicle speed is displayed.
Indicates [ON/OFF] condition from MAIN switch
MAIN SW ON/OFF
signal.
Indicates [ON/OFF] condition from CANCEL
CANCEL SW ON/OFF
switch signal.
Indicates [ON/OFF] condition from RESUME/AC-
RESUME/ACC SW ON/OFF
CELERATE switch signal.
Indicates [ON/OFF] condition from SET/COAST
SET SW ON/OFF
switch signal.
Indicates [ON/OFF] condition from ASCD brake
BRAKE SW1 ON/OFF
switch signal or ASCD clutch switch.
Indicates [ON/OFF] condition of stop lamp switch
BRAKE SW2 ON/OFF
signal.
Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD
set speed.
VHCL SPD CUT NON/CUT
CUT: Vehicle speed decreased to excessively
low compared with the ASCD set speed, and
ASCD operation is cut off.
Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD
LO SPEED CUT NON/CUT set speed.
CUT: Vehicle speed decreased to excessively
low, and ASCD operation is cut off.
Indicates [ON/OFF] condition of CVT O/D ac-
AT OD MONITOR ON/OFF
cording to the input signal from the TCM.
Indicates [ON/OFF] condition of CVT O/D cancel
AT OD CANCEL ON/OFF
request signal.
Indicates [ON/OFF] condition of CRUISE lamp
CRUISE LAMP ON/OFF determined by the ECM according to the input
signals.
Indicates [ON/OFF] condition of SET lamp deter-
SET LAMP ON/OFF
mined by the ECM according to the input signals.
The signal voltage of battery current sensor is
BAT CUR SEN mV
displayed.
The control condition of the power generation
voltage variable control (determined by ECM ac-
cording to the input signals) is indicated.
ALT DUTY SIG ON/OFF ON: Power generation voltage variable control is
active.
OFF: Power generation voltage variable control
is inactive.
A/F ADJ-B1 Indicates the correction of a factor stored in ECM.
The factor is calculated from the difference be-
tween the target air-fuel ratio stored in ECM and
A/F ADJ-B2 the air-fuel ratio calculated from A/F sensor 1 sig-
nal.
Indicates the duty ratio of the power generation
ALT DUTY % command value. The ratio is calculated by ECM
based on the battery current sensor signal.
NOTE:

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
A
ACTIVE TEST MODE
Test Item
EC
TEST ITEM CONDITION JUDGMENT CHECK ITEM (REMEDY)
Engine: Return to the original
Harness and connectors
FUEL INJEC- non-standard condition If malfunctioning symptom disap-
Fuel injector C
TION Change the amount of fuel injec- pears, see CHECK ITEM.
Air fuel ratio (A/F) sensor 1
tion using CONSULT-III.
Engine: Return to the original
non-standard condition D
IGNITION TIM- If malfunctioning symptom disap-
Timing light: Set Perform Idle Air Volume Learning.
ING pears, see CHECK ITEM.
Retard the ignition timing using
CONSULT-III.
E
Engine: After warming up, idle the Harness and connectors
engine. Compression
POWER BAL- A/C switch OFF Fuel injector
Engine runs rough or stops.
ANCE Selector lever: P or N position Power transistor F
Cut off each injector signal one at Spark plug
a time using CONSULT-III. Ignition coil
Ignition switch: ON G
Harness and connectors
Turn the cooling fan HI, MID,
COOLING FAN* Cooling fan moves and stops. Cooling fan motor
LOW and OFF using CON-
IPDM E/R
SULT-III.
H
Engine: Return to the original Harness and connectors
ENG COOLANT non-standard condition If malfunctioning symptom disap- Engine coolant temperature sen-
TEMP Change the engine coolant tem- pears, see CHECK ITEM. sor
perature using CONSULT-III. Fuel injector I
Ignition switch: ON (Engine
stopped)
FUEL PUMP RE- Fuel pump relay makes the operat- Harness and connectors
Turn the fuel pump relay ON
LAY
and OFF using CONSULT-III
ing sound. Fuel pump relay J
and listen to operating sound.
Ignition switch: ON
Turn solenoid valve ON and Solenoid valve makes the operating Harness and connectors K
VIAS S/V-1
OFF using CONSULT-III and lis- sound. Solenoid valve
ten to operating sound.
Ignition switch: ON L
Turn solenoid valve ON and Solenoid valve makes the operating Harness and connectors
VIAS S/V-2
OFF using CONSULT-III and lis- sound. Solenoid valve
ten to operating sound.
M
Ignition switch: ON
ENGINE Turn electronic controlled engine Electronic controlled engine mount Harness and connectors
MOUNTING mount IDLE and TRVL with makes the operating sound. Electronic controlled engine mount
CONSULT-III. N
Engine: After warming up, run en-
gine 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 O
opening percent using CON-
SULT-III.
FUEL/T TEMP P
Change the fuel tank temperature using CONSULT-III.
SEN
Ignition switch: ON (Engine
stopped)
VENT CON- Solenoid valve makes an operating Harness and connectors
Turn solenoid valve ON and
TROL/V sound. Solenoid valve
OFF with the CONSULT-III and
listen to operating sound.

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
TEST ITEM CONDITION JUDGMENT CHECK ITEM (REMEDY)
Engine: Return to the original
Harness and connectors
INT V/T ASSIGN non-standard condition If malfunctioning symptom disap-
Intake valve timing control sole-
ANGLE Change intake valve timing using pears, see CHECK ITEM.
noid valve
CONSULT-III.
Engine: Idle Harness and connectors
ALTERNATOR
Change duty ratio using CON- Battery voltage changes. IPDM E/R
DUTY
SULT-III. Alternator
*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.

DTC & SRT CONFIRMATION MODE

SRT STATUS Mode
For details, refer to EC-102, "Diagnosis Description".
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 Corresponding DTC No. Reference page

P0442 EC-278
EVP SML LEAK P0442/P1442*
P0455 EC-314
EVAPORATIVE SYSTEM EVP V/S LEAK P0456/P1456* P0456 EC-320
PURG VOL CN/V P1444 P0443 EC-284
PURG FLOW P0441 P0441 EC-273
A/F SEN1(B1) P1278/P1279 P0133 EC-198
A/F SEN1(B1) P1276 P0130 EC-186
A/F SEN1
A/F SEN1(B2) P1288/P1289 P0153 EC-198
A/F SEN1(B2) P1286 P0150 EC-186
HO2S2(B1) P1146 P0138 EC-210
HO2S2(B1) P1147 P0137 EC-203
HO2S2(B1) P0139 P0139 EC-219
HO2S2
HO2S2(B2) P1166 P0158 EC-210
HO2S2(B2) P1167 P0157 EC-203
HO2S2(B2) P0159 P0159 EC-219
*: DTC P1442 and P1456 does not apply to this model but appears in DTC Work Support Mode screens.

Diagnosis Tool Function INFOID:0000000003387928

DESCRIPTION
Generic Scan Tool (OBD II scan tool) complying with SAE J1978 has
several functions explained below.
ISO15765-4 is used as the protocol.
The name GST or Generic Scan Tool is used in this service man-
ual.

SEF139P

FUNCTION

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]

Diagnostic Service Function A

This diagnostic service gains access to current emission-related data values, including an-
Service $01 READINESS TESTS
alog inputs and outputs, digital inputs and outputs, and system status information.
This diagnostic service gains access to emission-related data value that were stored by EC
Service $02 (FREEZE DATA)
ECM during the freeze frame. For details, refer to EC-521, "DTC Index".
This diagnostic service gains access to emission-related power train trouble codes which
Service $03 DTCs
were stored by ECM. C
This diagnostic service can clear all emission-related diagnostic information. This in-
cludes:
Clear number of diagnostic trouble codes (Service $01)
Clear diagnostic trouble codes (Service $03) D
Service $04 CLEAR DIAG INFO
Clear trouble code for freeze frame data (Service $01)
Clear freeze frame data (Service $02)
Reset status of system monitoring test (Service $01) E
Clear on board monitoring test results (Service $06 and $07)
This diagnostic service accesses the results of on board diagnostic monitoring tests of
Service $06 (ON BOARD TESTS)
specific components/systems that are not continuously monitored.
F
This diagnostic service enables the off board test drive to obtain test results for emission-
Service $07 (ON BOARD TESTS) related powertrain components/systems that are continuously monitored during normal
driving conditions.
This diagnostic service can close EVAP system in ignition switch ON position (Engine G
stopped). When this diagnostic service is performed, EVAP canister vent control valve can
be closed.
In the following conditions, this diagnostic service cannot function. H
Low ambient temperature
Service $08
Low battery voltage
Engine running
Ignition switch OFF I
Low fuel temperature
Too much pressure is applied to EVAP system
This diagnostic service enables the off-board test device to request specific vehicle infor-
Service $09 (CALIBRATION ID) J
mation such as Vehicle Identification Number (VIN) and Calibration IDs.

INSPECTION PROCEDURE
1. Turn ignition switch OFF. K
2. Connect GST to data link connector (2), which is located under
LH dash panel.
L

N
JMBIA1123ZZ

3. Turn ignition switch ON. O

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 ON BOARD DIAGNOSTIC (OBD) SYSTEM
< FUNCTION DIAGNOSIS > [VQ35DE]
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 proce-

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

SEF416S

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 TROUBLE DIAGNOSIS - SPECIFICATION VALUE
< COMPONENT DIAGNOSIS > [VQ35DE]

COMPONENT DIAGNOSIS A
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Description INFOID:0000000003387929
EC
The specification (SP) value indicates the tolerance of the value that is displayed in SPEC in DATA MONI-
TOR mode of CONSULT-III during normal operation of the Engine Control System. When the value in SPEC
in DATA MONITOR mode is within the SP value, the Engine Control System is confirmed OK. When the C
value in SPEC in DATA MONITOR 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 illuminate D
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 correc-
tion) E
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)
F
Component Function Check INFOID:0000000003387930

1.START
G
Check that all of the following conditions are satisfied.
Vehicle driven distance: More than 5,000 km (3,107 miles)
Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm2, 14.25 - 15.12 psi) H
Atmospheric temperature: 20 - 30C (68 - 86F)
Engine coolant temperature: 75 - 95C (167 - 203F)
Transmission: Warmed-up
- After the engine is warmed up to normal operating temperature, drive vehicle until FLUID TEMP SE (CVT I
fluid temperature sensor signal) indicates more than 60C (140F).
Electrical load: Not applied
- Rear window defogger switch, air conditioner switch lighting switch are OFF. Steering wheel is straight J
ahead.
Engine speed: Idle
K
>> GO TO 2.
2.PERFORM SPEC OF DATA MONITOR MODE
L
With CONSULT-III
NOTE:
Perform SPEC in DATA MONITOR mode in maximum scale display.
1. Perform EC-12, "BASIC INSPECTION : Special Repair Requirement". M
2. Select B/FUEL SCHDL, A/F ALPHA-B1, A/F ALPHA-B2 and MAS A/F SE-B1 in SPEC of DATA
MONITOR mode with CONSULT-III.
3. Check that monitor items are within the SP value.
N
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Go to EC-128, "Diagnosis Procedure". O

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 TROUBLE DIAGNOSIS - SPECIFICATION VALUE
< COMPONENT DIAGNOSIS > [VQ35DE]
Diagnosis Procedure INFOID:0000000003387931

OVERALL SEQUENCE

JMBIA1468GB

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 TROUBLE DIAGNOSIS - SPECIFICATION VALUE
< COMPONENT DIAGNOSIS > [VQ35DE]

EC

PBIB3214E

DETAILED PROCEDURE P
1.CHECK A/F ALPHA-B1, A/F ALPHA-B2
With CONSULT-III
1. Start engine.
2. Confirm that the testing conditions are met. Refer to EC-127, "Component Function Check".
3. Select A/F ALPHA-B1, A/F ALPHA-B2 in SPEC of DATA MONITOR mode, and check that each
indication is within the SP value.

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NOTE:
Check A/F ALPHA-B1, A/F ALPHA-B2 for approximately 1 minute because they may fluctuate. It is NG
if the indication is out of the SP value even a little.
Is the measurement value within the SP value?
YES >> GO TO 17.
NO-1 >> Less than the SP value: GO TO 2.
NO-2 >> More than the SP value: GO TO 3.
2.CHECK B/FUEL SCHDL
Select B/FUEL SCHDL in SPEC of DATA MONITOR mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> GO TO 4.
NO >> More than the SP value: GO TO 19.
3.CHECK B/FUEL SCHDL
Select B/FUEL SCHDL in SPEC of DATA MONITOR mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> GO TO 6.
NO-1 >> More than the SP value: GO TO 6.
NO-2 >> Less than the SP value: GO TO 25.
4.CHECK A/F ALPHA-B1, A/F ALPHA-B2
1. Stop the engine.
2. Disconnect PCV hose, and then plug it.
3. Start engine.
4. Select A/F ALPHA-B1, A/F ALPHA-B2 in SPEC of DATA MONITOR mode, and check that each
indication is within the SP value.
Is the measurement value within the SP value?
YES >> GO TO 5.
NO >> GO TO 6.
5.CHANGE ENGINE OIL
1. Stop the engine.
2. Change engine oil.
NOTE:
This symptom may occur when a large amount of gasoline is mixed with engine oil because of driving
conditions (such as when engine oil temperature does not rise enough since a journey distance is too
short during winter). The symptom will not be detected after changing engine oil or changing driving con-
ditions.

>> INSPECTION END

6.CHECK FUEL PRESSURE
Check fuel pressure. (Refer to EC-545, "Inspection".)
Is the inspection result normal?
YES >> GO TO 9.
NO-1 >> Fuel pressure is too high: Replace fuel filter and fuel pump assembly and then. GO TO 8.
NO-2 >> Fuel pressure is too low: GO TO 7.
7.DETECT MALFUNCTIONING PART
Check fuel hoses and fuel tubes for clogging.
Is the inspection result normal?
YES >> Replace fuel filter and fuel pump assembly and then GO TO 8.
NO >> Repair or replace malfunctioning part and then GO TO 8.
8.CHECK A/F ALPHA-B1, A/F ALPHA-B2
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 TROUBLE DIAGNOSIS - SPECIFICATION VALUE
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1. Start engine.
2. Select A/F ALPHA-B1, A/F ALPHA-B2 in SPEC of DATA MONITOR mode, and check that each A
indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END EC
NO >> GO TO 9.
9.PERFORM POWER BALANCE TEST
C
1. Perform POWER BALANCE in ACTIVE TEST mode.
2. Check that the each cylinder produces a momentary engine speed drop.
Is the inspection result normal?
D
YES >> GO TO 12.
NO >> GO TO 10.
10.DETECT MALFUNCTIONING PART E
Check the following below.
Ignition coil and its circuit (Refer to EC-451, "Component Function Check".)
Fuel injector and its circuit (Refer to EC-444, "Component Function Check".) F
Intake air leakage
Low compression pressure (Refer to EM-23, "Inspection".)
Is the inspection result normal?
G
YES >> Replace fuel injector and then GO TO 11.
NO >> Repair or replace malfunctioning part and then GO TO 11.
11.CHECK A/F ALPHA-B1, A/F ALPHA-B2 H
1. Start engine.
2. Select A/F ALPHA-B1, A/F ALPHA-B2 in SPEC of DATA MONITOR mode, and check that each
indication is within the SP value. I
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> GO TO 12. J
12.CHECK A/F SENSOR 1 FUNCTION
Perform all DTC CONFIRMATION PROCEDURE related with A/F sensor 1.
For DTC P0130, P0150, refer to EC-186, "DTC Logic". K
For DTC P0131, P0151, refer to EC-190, "DTC Logic".
For DTC P0132, P0152, refer to EC-194, "DTC Logic".
For DTC P0133, P0153, refer to EC-198, "DTC Logic". L
For DTC P2A00, P2A03, refer to EC-427, "DTC Logic".
Are any DTCs detected?
YES >> GO TO 15. M
NO >> GO TO 13.
13.CHECK A/F SENSOR 1 CIRCUIT
N
Perform Diagnostic Procedure according to corresponding DTC.

>> GO TO 14. O
14.CHECK A/F ALPHA-B1, A/F ALPHA-B2
1. Start engine.
2. Select A/F ALPHA-B1, A/F ALPHA-B2 in SPEC of DATA MONITOR mode, and check that each P
indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> GO TO 15.
15.DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR
1. Stop the engine.

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 TROUBLE DIAGNOSIS - SPECIFICATION VALUE
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Disconnect ECM harness connector. Check pin terminal and connector for damage, and then reconnect it.

>> GO TO 16.
16.CHECK A/F ALPHA-B1, A/F ALPHA-B2
1. Start engine.
2. Select A/F ALPHA-B1, A/F ALPHA-B2 in SPEC of DATA MONITOR mode, and check that each
indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Detect malfunctioning part according to EC-533, "Symptom Table".
17.CHECK B/FUEL SCHDL
Select B/FUEL SCHDL in SPEC of DATA MONITOR mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO-1 >> More than the SP value: GO TO 18.
NO-2 >> Less than the SP value: GO TO 25.
18.DETECT MALFUNCTIONING PART
1. Check for the cause of large engine friction. Refer to the following.
- Engine oil level is too high
- Engine oil viscosity
- Belt tension of power steering, alternator, A/C compressor, etc. is excessive
- Noise from engine
- Noise from transmission, etc.
2. Check for the cause of insufficient combustion. Refer to the following.
- Valve clearance malfunction
- Intake valve timing control function malfunction
- Camshaft sprocket installation malfunction, etc.

>> Repair or replace malfunctioning part, and then GO TO 30.

19.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
Crushed air ducts
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system
Is the inspection result normal?
YES >> GO TO 21.
NO >> Repair or replace malfunctioning part, and then GO TO 20.
20.CHECK A/F ALPHA-B1, A/F ALPHA-B2, AND B/FUEL SCHDL
Select A/F ALPHA-B1, A/F ALPHA-B2, and B/FUEL SCHDL in SPEC of DATA MONITOR mode, and
check that each indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> B/FUEL SCHDL is more, A/F ALPHA-B1, A/F ALPHA-B2 are less than the SP value: GO TO
21.
21.DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and
then reconnect it again.

>> GO TO 22.

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 TROUBLE DIAGNOSIS - SPECIFICATION VALUE
< COMPONENT DIAGNOSIS > [VQ35DE]

22.CHECK A/F ALPHA-B1, A/F ALPHA-B2 A

1. Start engine.
2. Select A/F ALPHA-B1, A/F ALPHA-B2 in SPEC of DATA MONITOR mode, and check that each
indication is within the SP value.
EC
Is the measurement value within the SP value?
YES >> Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to EC-163, "Diagno-
sis Procedure". Then GO TO 29.
C
NO >> GO TO 23.
23.CHECK MAS A/F SE-B1
Select MAS A/F SE-B1 in SPEC of DATA MONITOR mode, and check that the indication is within the SP D
value.
Is the measurement value within the SP value?
YES >> GO TO 24. E
NO >> More than the SP value: Replace mass air flow sensor, and then GO TO 29.
24.REPLACE ECM
F
1. Replace ECM.
2. Refer to EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
G
>> GO TO 29.
25.CHECK INTAKE SYSTEM H
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
Crushed air ducts
Malfunctioning seal in air cleaner element I
Uneven dirt in air cleaner element
Improper specification in intake air system
Is the inspection result normal? J
YES >> GO TO 27.
NO >> Repair or replace malfunctioning part, and then GO TO 26.
26.CHECK B/FUEL SCHDL K
Select B/FUEL SCHDL in SPEC of DATA MONITOR mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value? L
YES >> INSPECTION END
NO >> Less than the SP value: GO TO 27.
27.CHECK MAS A/F SE-B1 M

Select MAS A/F SE-B1 in SPEC of DATA MONITOR mode, and check that the indication is within the SP
value. N
Is the measurement value within the SP value?
YES >> GO TO 28.
NO >> Less than the SP value: Replace mass air flow sensor, and then GO TO 30. O
28.CHECK INTAKE SYSTEM
Check for the cause of air leakage after the mass air flow sensor. Refer to the following.
Disconnection, looseness, and cracks in air duct P
Looseness of oil filler cap
Disconnection of oil level gauge
Open stuck, breakage, hose disconnection, or cracks in PCV valve
Disconnection or cracks in EVAP purge hose, stuck open EVAP canister purge volume control solenoid
valve
Malfunctioning seal in rocker cover gasket
Disconnection, looseness, or cracks in hoses, such as a vacuum hose, connecting to intake air system parts

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 TROUBLE DIAGNOSIS - SPECIFICATION VALUE
< COMPONENT DIAGNOSIS > [VQ35DE]
Malfunctioning seal in intake air system, etc.

>> GO TO 30.
29.CHECK A/F ALPHA-B1, A/F ALPHA-B2, AND B/FUEL SCHDL
Select A/F ALPHA-B1, A/F ALPHA-B2, and B/FUEL SCHDL in SPEC of DATA MONITOR mode, and
check that each indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Detect malfunctioning part according to EC-533, "Symptom Table".
30.CHECK B/FUEL SCHDL
Select B/FUEL SCHDL in SPEC of DATA MONITOR mode, and then check that the indication is within
the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Detect malfunctioning part according to EC-533, "Symptom Table".

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 POWER SUPPLY AND GROUND CIRCUIT
< COMPONENT DIAGNOSIS > [VQ35DE]
POWER SUPPLY AND GROUND CIRCUIT
A
Diagnosis Procedure INFOID:0000000004752070

1.CHECK GROUND CONNECTION EC

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal? C
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT D

1. Disconnect ECM harness connector.

2. Check the continuity between ECM harness connector and ground. E

ECM
Ground Continuity
Connector Terminal F
12
F7
16
G
107
Ground Existed
108
E16
111 H
112
3. Also check harness for short to power.
is the inspection result normal? I
YES >> GO TO 4.
NO >> GO TO 3.
J
3.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F121, E7 K
Harness for open or short between ECM and ground

>> Repair open circuit or short to power in harness or connectors. L

4.CHECK ECM POWER SUPPLY CIRCUIT-I
1. Reconnect ECM harness connector.
2. Turn ignition switch OFF and then ON. M
3. Check the voltage between ECM harness connector terminals.

ECM N
+ Voltage
Connector
Terminal Terminal
O
E16 93 112 Battery voltage
Is the inspection result normal?
YES >> GO TO 6. P
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
IPDM E/R connector E10
10 A fuse (No. 44)
Harness for open or short between ECM and IPDM E/R

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 POWER SUPPLY AND GROUND CIRCUIT
< COMPONENT DIAGNOSIS > [VQ35DE]

>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK ECM POWER SUPPLY CIRCUIT-II
Check the voltage between ECM harness connector terminals.

ECM
+ Condition Voltage
Connector
Terminal Terminal
After turning ignition switch OFF, battery
Ignition switch
E16 105 112 voltage will exist for a few seconds, then
ON OFF
drop to approximately 0 V.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 9.
7.CHECK ECM POWER SUPPLY CIRCUIT-III
1. Turn ignition switch ON.
2. Check the voltage between IPDM E/R harness connector and ground.

IPDM E/R
Ground Voltage
Connector Terminal
49
F12 Ground Battery voltage
53
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace IPDM E/R.
8.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

9.CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Check the voltage between ECM harness connector terminals.

ECM
+ Voltage
Connector Terminal Connector Terminal
F7 24 E16 112 Battery voltage
Is the inspection result normal?
YES >> GO TO 12.
NO >> GO TO 10.
10.CHECK ECM POWER SUPPLY CIRCUIT-V
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between ECM harness connector and IPDM E/R harness connector.

ECM IPDM E/R

Continuity
Connector Terminal Connector Terminal
F7 24 F12 69 Existed

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 POWER SUPPLY AND GROUND CIRCUIT
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Also check harness for short to ground and short to power.
Is the inspection result normal? A
YES >> GO TO 11.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
11.CHECK 15 A FUSE EC

1. Disconnect 15 A fuse (No. 50) from IPDM E/R.

2. Check 15 A fuse.
C
Is the inspection result normal?
YES >> GO TO 13.
NO >> Replace 15 A fuse. D
12.CHECK ECM POWER SUPPLY CIRCUIT-VI
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector. E
3. Check the continuity between ECM harness connector and IPDM E/R harness connector.

ECM IPDM E/R F

Continuity
Connector Terminal Connector Terminal
E16 105 E10 10 Existed
G
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 13. H
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
13.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident". I
Is the inspection result normal?
YES >> Replace IPDM E/R.
J
NO >> Repair or replace harness or connectors.

Revision: 2008 October EC-137 2009 Murano

 U0101 CAN COMM CIRCUIT
< COMPONENT DIAGNOSIS > [VQ35DE]
U0101 CAN COMM CIRCUIT
Description INFOID:0000000004734288

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic 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.
DTC Logic INFOID:0000000004734289

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
CAN communication line between
When ECM is not transmitting or receiving CAN
Lost communication TCM and ECM
U0101 communication signal of OBD (emission-related
with TCM CAN communication line open or
diagnosis) with TCM for 2 seconds or more.
shorted

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check DTC.
Is DTC detected?
YES >> EC-138, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000004734290

Go to LAN-16, "Trouble Diagnosis Flow Chart".

Revision: 2008 October EC-138 2009 Murano

 U0164 CAN COMM CIRCUIT
< COMPONENT DIAGNOSIS > [VQ35DE]
U0164 CAN COMM CIRCUIT
A
Description INFOID:0000000004734291

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul- EC
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic 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. C
Each control unit transmits/receives data but selectively reads required data only.
DTC Logic INFOID:0000000004734292
D

DTC DETECTION LOGIC

E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
CAN communication line between
When ECM is not transmitting or receiving CAN com-
Lost communication Unified meter and A/C amp. and
munication signal of OBD (emission related diagno- F
U0164 with Unified meter and ECM
sis) with Unified meter and A/C amp. for 2 seconds or
A/C amp. CAN communication line open or
more.
shorted
G
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 3 seconds. H
2. Check DTC.
Is DTC detected?
YES >> EC-139, "Diagnosis Procedure". I
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000004734293
J
Go to LAN-16, "Trouble Diagnosis Flow Chart".

Revision: 2008 October EC-139 2009 Murano

 U1000, U1001 CAN COMM CIRCUIT
< COMPONENT DIAGNOSIS > [VQ35DE]
U1000, U1001 CAN COMM CIRCUIT
Description INFOID:0000000003387933

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic 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.
DTC Logic INFOID:0000000003387934

DTC DETECTION LOGIC

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
When ECM is not transmitting or receiving CAN com-
U1000 munication signal of OBD (emission related diagno-
sis) for 2 seconds or more. Harness or connectors
CAN communication
(CAN communication line is open or
line When ECM is not transmitting or receiving CAN com- shorted)
U1001 munication signal other than OBD (emission related
diagnosis) for 2 seconds or more.

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check DTC.
Is DTC detected?
YES >> EC-140, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387935

Go to LAN-16, "Trouble Diagnosis Flow Chart".

Revision: 2008 October EC-140 2009 Murano

 P0011, P0021 IVT CONTROL
< COMPONENT DIAGNOSIS > [VQ35DE]
P0011, P0021 IVT CONTROL
A
DTC Logic INFOID:0000000003387939

DTC DETECTION LOGIC EC

NOTE:
If DTC P0011 or P0021 is displayed with DTC P0075 or P0081, first perform the trouble diagnosis for
DTC P0075, P0081. Refer to EC-151, "DTC Logic". C

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
D
Intake valve timing Crankshaft position sensor (POS)
P0011 control performance Camshaft position sensor (PHASE)
(bank 1) Intake valve timing control solenoid valve
There is a gap between angle of target and Accumulation of debris to the signal pick-up E
Intake valve timing phase-control angle degree. portion of the camshaft
P0021 control performance Timing chain installation
(bank 2) Foreign matter caught in the oil groove for in-
take valve timing control F

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING G
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. H
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION: I
Before performing the following procedure, confirm that battery voltage is between 10 V and 16 V at
idle.
J
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
K
With CONSULT-III
1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Maintain the following conditions for at least 6 consecutive seconds. Hold the accelerator pedal as steady L
as possible.

VHCL SPEED SE 100 - 120 km/h (63 - 75 mph) M

ENG SPEED 2,000 - 4,000 rpm
COOLAN TEMP/S More than 60C (140F)
N
B/FUEL SCHDL More than 7.3 msec
Selector lever D position
CAUTION: O
Always drive at a safe speed.
4. Stop vehicle with engine running and let engine idle for 10 seconds.
5. Check 1st trip DTC. P
With GST
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> Go to EC-142, "Diagnosis Procedure"
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-II
Revision: 2008 October EC-141 2009 Murano
 P0011, P0021 IVT CONTROL
< COMPONENT DIAGNOSIS > [VQ35DE]
With CONSULT-III
1. Maintain the following conditions for at least 20 consecutive seconds.

ENG SPEED 1,400 - 3,175 rpm (A constant rotation is maintained.)

COOLAN TEMP/S More than 70C (158F)
Selector lever 1st or 2nd position
Driving vehicle uphill
Driving location uphill (Increased engine load will help maintain the driving conditions re-
quired for this test.)
CAUTION:
Always drive at a safe speed.
2. Check 1st trip DTC.
With GST
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> Go to EC-142, "Diagnosis Procedure"
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387940

1.CHECK OIL PRESSURE WARNING LAMP

1. Start engine.
2. Check oil pressure warning lamp and confirm it is not illumi-
nated.
Is oil pressure warming lamp illuminated?
YES >> Go to LU-7, "Inspection".
NO >> GO TO 2.

PBIA8559J

2.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to EC-143, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace malfunctioning intake valve timing control solenoid valve.
3.CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to EC-263, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace crankshaft position sensor (POS).
4.CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to EC-266, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace malfunctioning camshaft position sensor (PHASE).
5.CHECK CAMSHAFT (INTAKE)
Check the following.

Revision: 2008 October EC-142 2009 Murano

 P0011, P0021 IVT CONTROL
< COMPONENT DIAGNOSIS > [VQ35DE]
Accumulation of debris on the signal plate of camshaft rear end
Chipping signal plate of camshaft rear end A
Is the inspection result normal?
YES >> GO TO 6.
NO >> Remove debris and clean the signal plate of camshaft EC
rear end or replace camshaft.

JMBIA0058ZZ

6.CHECK TIMING CHAIN INSTALLATION D

Check service records for any recent repairs that may cause timing chain misalignment.
Are there any service records that may cause timing chain misalignment? E
YES >> Check timing chain installation. Refer to EM-54, "Removal and Installation".
NO >> GO TO 7.
7.CHECK LUBRICATION CIRCUIT F
Refer to EM-18, "Inspection and Adjustment".
Is the inspection result normal?
G
YES >> GO TO 8.
NO >> Clean lubrication line.
8.CHECK INTERMITTENT INCIDENT H
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END I

Component Inspection INFOID:0000000003387941

J
1.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-I
1. Disconnect intake valve timing control solenoid valve harness connector.
2. Check resistance between intake valve timing control solenoid valve terminals as per the following. K

Terminals Resistance
1 and 2 7.0 - 7.5 [at 20C (68F)] L

1 or 2 and ground
(Continuity should not exist)
Is the inspection result normal? M
YES >> GO TO 2.
NO >> Replace malfunctioning intake valve timing control solenoid valve.
N
2.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-II
1. Remove intake valve timing control solenoid valve.
2. Provide 12 V DC between intake valve timing control solenoid O
valve terminals 1 and 2, and then interrupt it. Check that the
plunger moves as shown in the figure.
CAUTION:
Never apply 12 V DC continuously for 5 seconds or more. P
Doing so may result in damage to the coil in intake valve
timing control solenoid valve.
NOTE:
Always replace O-ring when intake valve timing control
solenoid valve is removed.
Is the inspection result normal? JMBIA0079ZZ

YES >> INSPECTION END

Revision: 2008 October EC-143 2009 Murano

 P0011, P0021 IVT CONTROL
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Replace malfunctioning intake valve timing control solenoid valve.

Revision: 2008 October EC-144 2009 Murano

 P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
< COMPONENT DIAGNOSIS > [VQ35DE]
P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
A
Description INFOID:0000000003387942

SYSTEM DESCRIPTION EC

Sensor Input signal to ECM ECM function Actuator

Camshaft position sensor (PHASE) C
Engine speed Air fuel ratio (A/F) sensor 1 Air fuel ratio (A/F) sensor 1
Crankshaft position sensor (POS)
heater control heater
Mass air flow sensor Amount of intake air
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating D
condition to keep the temperature of A/F sensor 1 element within the specified range.
DTC Logic INFOID:0000000003387943
E

DTC DETECTION LOGIC

F
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
The current amperage in the A/F sensor 1 heater Harness or connectors
Air fuel ratio (A/F) sensor
circuit is out of the normal range. (The A/F sensor 1 heater circuit is
P0031 1 heater (bank 1) control G
(An excessively low voltage signal is sent to ECM open or shorted.)
circuit low
through the A/F sensor 1 heater.) A/F sensor 1 heater
The current amperage in the A/F sensor 1 heater Harness or connectors
Air fuel ratio (A/F) sensor H
circuit is out of the normal range. (The A/F sensor 1 heater circuit is
P0032 1 heater (bank 1) control
(An excessively high voltage signal is sent to ECM shorted.)
circuit high
through the A/F sensor 1 heater.) A/F sensor 1 heater
The current amperage in the A/F sensor 1 heater Harness or connectors I
Air fuel ratio (A/F) sensor
circuit is out of the normal range. (The A/F sensor 1 heater circuit is
P0051 1 heater (bank 2) control
(An excessively low voltage signal is sent to ECM open or shorted.)
circuit low
through the A/F sensor 1 heater.) A/F sensor 1 heater
J
The current amperage in the A/F sensor 1 heater Harness or connectors
Air fuel ratio (A/F) sensor
circuit is out of the normal range. (The A/F sensor 1 heater circuit is
P0052 1 heater (bank 2) control
(An excessively high voltage signal is sent to ECM shorted.)
circuit high
through the A/F sensor 1 heater.) A/F sensor 1 heater K
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING L
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. M
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle. N

>> GO TO 2.
O
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 10 seconds.
2. Check 1st trip DTC. P
Is 1st trip DTC detected?
YES >> Go to EC-145, "Diagnosis Procedure".
NG >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387944

1.CHECK GROUND CONNECTION

Revision: 2008 October EC-145 2009 Murano
 P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect air fuel ratio (A/F) sensor 1 harness connector.
2. Turn ignition switch ON.
3. Check the voltage between A/F sensor 1 harness connector and ground.

A/F sensor 1
DTC Ground Voltage
Bank Connector Terminal
P0031, P0032 1 F27 4
Ground Battery voltage
P0051, P0052 2 F64 4
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
IPDM E/R harness connector F12
15 A fuse (No. 46)
Harness for open or short between A/F sensor 1 and fuse

>> Repair or replace harness or connectors.

4.CHECK A/F SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between A/F sensor 1 harness connector and ECM harness connector.

A/F sensor 1 ECM

DTC Continuity
Bank Connector Terminal Connector Terminal
P0031, P0032 1 F27 3 4
F7 Existed
P0051, P0052 2 F64 3 8
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK A/F SENSOR 1 HEATER
Refer to EC-147, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
Discard any A/F 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 A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

Revision: 2008 October EC-146 2009 Murano

 P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
< COMPONENT DIAGNOSIS > [VQ35DE]

>> INSPECTION END A

7.CHECK INTERMITTENT INCIDENT
Perform GI-40, "Intermittent Incident". EC

>> INSPECTION END

C
Component Inspection INFOID:0000000003387945

1.CHECK AIR FUEL RATIO (A/F) SENSOR 1

D
Check resistance between A/F sensor terminals as per the following.

Terminal No. Resistance E

3 and 4 1.8 - 2.44 [at 25C (77F)]
3 and 1, 2
4 and 1, 2 (Continuity should not exist) F
Is the inspection result normal?
YES >> INSPECTION END
G
NO >> GO TO 2.
2.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1. H
CAUTION:
Discard any (A/F) 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. I
Before installing new (A/F) sensor, clean exhaust system threads using Heated Oxygen Sensor
Thread Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubri-
cant (commercial service tool).
J

>> INSPECTION END

K

Revision: 2008 October EC-147 2009 Murano

 P0037, P0038, P0057, P0058 HO2S2 HEATER
< COMPONENT DIAGNOSIS > [VQ35DE]
P0037, P0038, P0057, P0058 HO2S2 HEATER
Description INFOID:0000000003387946

SYSTEM DESCRIPTION

Sensor Input signal to ECM ECM function Actuator

Camshaft position sensor (PHASE)
Engine speed
Crankshaft position sensor (POS)
Heated oxygen sensor 2
Heated oxygen sensor 2 heater
Engine coolant temperature sensor Engine coolant temperature heater 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 Heated oxygen sensor 2 heater

Above 3,600 rpm OFF
Below 3,600 rpm after the following conditions are met.
Engine: After warming up
ON
Keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load

DTC Logic INFOID:0000000003387947

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
The current amperage in the heated oxygen sensor Harness or connectors
Heated oxygen sensor 2
2 heater circuit is out of the normal range. (The heated oxygen sensor 2 heater
P0037 heater (bank 1) control
(An excessively low voltage signal is sent to ECM circuit is open or shorted.)
circuit low
through the heated oxygen sensor 2 heater.) Heated oxygen sensor 2 heater
The current amperage in the heated oxygen sensor Harness or connectors
Heated oxygen sensor 2
2 heater circuit is out of the normal range. (The heated oxygen sensor 2 heater
P0038 heater (bank 1) control
(An excessively high voltage signal is sent to ECM circuit is shorted.)
circuit high
through the heated oxygen sensor 2 heater.) Heated oxygen sensor 2 heater
The current amperage in the heated oxygen sensor Harness or connectors
Heated oxygen sensor 2
2 heater circuit is out of the normal range. (The heated oxygen sensor 2 heater
P0057 heater (bank 2) control
(An excessively low voltage signal is sent to ECM circuit is open or shorted.)
circuit low
through the heated oxygen sensor 2 heater.) Heated oxygen sensor 2 heater
The current amperage in the heated oxygen sensor Harness or connectors
Heated oxygen sensor 2
2 heater circuit is out of the normal range. (The heated oxygen sensor 2 heater
P0058 heater (bank 2) control
(An excessively high voltage signal is sent to ECM circuit is shorted.)
circuit high
through the heated oxygen sensor 2 heater.) Heated oxygen sensor 2 heater

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5 V and 16 V at
idle.

>> GO TO 2.

Revision: 2008 October EC-148 2009 Murano

 P0037, P0038, P0057, P0058 HO2S2 HEATER
< COMPONENT DIAGNOSIS > [VQ35DE]

2.PERFORM DTC CONFIRMATION PROCEDURE A

1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
EC
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
6. Let engine idle for 1 minute.
7. Check 1st trip DTC. C
Is 1st tip DTC detected?
YES >> Go to EC-149, "Diagnosis Procedure".
NO >> INSPECTION END D

Diagnosis Procedure INFOID:0000000003387948

1.CHECK GROUND CONNECTION E

1. Turn ignition switch OFF.

2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
F
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. G
2.CHECK HO2S2 POWER SUPPLY CIRCUIT
1. Disconnect heated oxygen sensor 2 (HO2S2) harness connector.
2. Turn ignition switch ON. H
3. Check the voltage between HO2S2 harness connector and ground.

HO2S2 I
DTC Ground Voltage
Bank Connector Terminal
P0037, P0038 1 F70 2
Ground Battery voltage J
P0057, P0058 2 F71 2
Is the inspection result normal?
YES >> GO TO 4. K
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
L
Check the following.
IPDM E/R connector F8
15 A fuse (No. 46)
Harness for open or short between heated oxygen sensor 2 and fuse M

>> Repair open circuit, short to ground or short to power in harness or connectors.
N
4.CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector. O
3. Check the continuity between HO2S2 harness connector and ECM harness connector.

HO2S2 ECM P
DTC Continuity
Bank Connector Terminal Connector Terminal
P0037, P0038 1 F70 3 13
F7 Existed
P0057, P0058 2 F71 3 17
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.

Revision: 2008 October EC-149 2009 Murano

 P0037, P0038, P0057, P0058 HO2S2 HEATER
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to EC-150, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning 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 system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

>> INSPECTION END

7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003387949

1.CHECK HEATED OXYGEN SENSOR 2 HEATER

Check resistance between HO2S2 terminals as per the following.

Terminal No. Resistance

2 and 3 3.4 - 4.4 [at 25C (77F)]
1 and 2, 3, 4
4 and 1, 2, 3 (Continuity should not exist)

Is the inspection result normal?

YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning 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 system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

>> INSPECTION END

Revision: 2008 October EC-150 2009 Murano

 P0075, P0081 IVT CONTROL SOLENOID VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
P0075, P0081 IVT CONTROL SOLENOID VALVE
A
Description INFOID:0000000003387950

Intake valve timing control solenoid valve is activated by ON/OFF EC

pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil
amount and direction of flow through intake valve timing control unit
or stops oil flow. C
The longer pulse width advances valve timing.
The shorter pulse width retards valve timing.
When ON and OFF pulse widths become equal, the solenoid valve D
stops oil pressure flow to fix the intake valve angle at the control
position.
PBIB1842E E
DTC Logic INFOID:0000000003387951

DTC DETECTION LOGIC F

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
G
Intake valve timing control so- Harness or connectors
P0075 An improper voltage is sent to the ECM
lenoid valve (bank 1) circuit (Intake valve timing control solenoid valve
through intake valve timing control solenoid
Intake valve timing control so- circuit is open or shorted.)
P0081 valve. H
lenoid valve (bank 2) circuit Intake valve timing control solenoid valve

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING I

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. J
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
K
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE L
1. Start engine and let it idle for 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected? M
YES >> Go to EC-151, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387952
N

1.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
O
1. Turn ignition switch OFF.
2. Disconnect intake valve timing (IVT) control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check the voltage between intake valve timing control solenoid valve harness connector and ground with P
CONSULT-III or tester.

IVT control solenoid valve

DTC Ground Voltage
Bank Connector Terminal
P0075 1 F81 2
Ground Battery voltage
P0081 2 F82 2

Revision: 2008 October EC-151 2009 Murano

 P0075, P0081 IVT CONTROL SOLENOID VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
2.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between intake valve timing control solenoid valve harness connector and ECM har-
ness connector.

IVT control solenoid valve ECM

DTC Continuity
Bank Connector Terminal Connector Terminal
P0075 1 F81 1 78
F8 Existed
P0081 2 F82 1 75
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to EC-152, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace malfunctioning intake valve timing control solenoid valve.
4.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003591557

1.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-I

1. Disconnect intake valve timing control solenoid valve harness connector.
2. Check resistance between intake valve timing control solenoid valve terminals as per the following.

Terminals Resistance
1 and 2 7.0 - 7.5 [at 20C (68F)]

1 or 2 and ground
(Continuity should not exist)
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace malfunctioning intake valve timing control solenoid valve.
2.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE-II
1. Remove intake valve timing control solenoid valve.

Revision: 2008 October EC-152 2009 Murano

 P0075, P0081 IVT CONTROL SOLENOID VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Provide 12 V DC between intake valve timing control solenoid
valve terminals 1 and 2, and then interrupt it. Check that the A
plunger moves as shown in the figure.
CAUTION:
Never apply 12 V DC continuously for 5 seconds or more.
EC
Doing so may result in damage to the coil in intake valve
timing control solenoid valve.
NOTE:
Always replace O-ring when intake valve timing control C
solenoid valve is removed.
Is the inspection result normal? JMBIA0079ZZ

YES >> INSPECTION END D

NO >> Replace malfunctioning intake valve timing control solenoid valve.

Revision: 2008 October EC-153 2009 Murano

 P0101 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0101 MAF SENSOR
Description INFOID:0000000003387954

The mass air flow sensor (1) is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. The mass air flow sensor controls the temperature of the
hot wire to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The greater air flow, the
greater the heat loss.
Therefore, the electric current supplied to hot wire is changed to
maintain the temperature of the hot wire as air flow increases. The
ECM detects the air flow by means of this current change.

PBIA9559J

DTC Logic INFOID:0000000003387955

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
(The sensor circuit is open or
A high voltage from the sensor is sent to ECM shorted.)
A)
under light load driving condition. Mass air flow sensor
EVAP control system pressure
sensor
Mass air flow sensor cir- Harness or connectors
P0101
cuit range/performance (The sensor circuit is open or
shorted.)
A low voltage from the sensor is sent to ECM un- Intake air leakage
B)
der heavy load driving condition. Mass air flow sensor
EVAP control system pressure
sensor
Intake air temperature sensor

DTC CONFIRMATION PROCEDURE

NOTE:
Check vehicle specifications and VIN, then select the procedure to be performed. (Refer to the table below.)

Vehicle specification Vehicle serial number TYPE

Up to JN8AZ18U*9W100000 A
From JN8AZ18U*9W100001 B
2WD
Up to JN8AZ18U*9W710000 A
From JN8AZ18U*9W710001 B
Up to JN8AZ18W*9W200000 A
From JN8AZ18W*9W200001 B
4WD
Up to JN8AZ18W*9W810000 A
From JN8AZ18W*9W810001 B

TYPE A
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

Revision: 2008 October EC-154 2009 Murano

 P0101 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

>> GO TO 2. A
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1. Start engine and warm it up to normal operating temperature. EC
2. Run engine for at least 10 seconds at idle speed.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
C
YES >> Go to EC-157, "Diagnosis Procedure".
NO-1 >> With CONSULT-III: GO TO 3.
NO-2 >> Without CONSULT-III: GO TO 5.
D
3.CHECK MASS AIR FLOW SENSOR FUNCTION
1. Turn ignition switch ON.
2. Start engine and warm it up to normal operating temperature. E
If engine cannot be started, go to EC-157, "Diagnosis Procedure".
3. Select MAS A/F SE-B1 in DATA MONITOR mode with CON-
SULT-III.
4. Check the voltage of MAS A/F SE-B1. F
5. Increases engine speed to about 4,000 rpm.
6. Monitor the linear voltage rise in response to engine speed
increases. G
Is the inspection result normal?
YES >> GO TO 4.
NO >> Go to EC-157, "Diagnosis Procedure". H

PBIB3457E
L
4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
1. Maintain the following conditions for at least 5 consecutive seconds. M

ENG SPEED More than 2,000 rpm

TP SEN 1-B1 More than 3 V N
TP SEN 2-B1 More than 3 V
Selector lever Suitable position
O
Driving vehicle uphill (Increased engine load) will help
Driving location
maintain the driving conditions required for this test.
CAUTION:
P
Always drive vehicle at a safe speed.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-157, "Diagnosis Procedure".
NO >> INSPECTION END
5.PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

Revision: 2008 October EC-155 2009 Murano

 P0101 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Perform component function check. Refer to EC-157, "Component Function Check".
NOTE:
Use component function check to check the overall function of the mass air flow sensor circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-157, "Diagnosis Procedure".
TYPE B
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1. Start engine and warm it up to normal operating temperature.
2. Run engine for at least 10 seconds at idle speed.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-157, "Diagnosis Procedure".
NO-1 >> With CONSULT-III: GO TO 3.
NO-2 >> Without CONSULT-III: GO TO 5.
3.CHECK MASS AIR FLOW SENSOR FUNCTION
1. Turn ignition switch ON.
2. Start engine and warm it up to normal operating temperature.
If engine cannot be started, go to EC-157, "Diagnosis Procedure".
3. Select MAS A/F SE-B1 in DATA MONITOR mode with CON-
SULT-III.
4. Check the voltage of MAS A/F SE-B1.
5. Increases engine speed to about 4,000 rpm.
6. Monitor the linear voltage rise in response to engine speed
increases.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Go to EC-157, "Diagnosis Procedure".

PBIB3457E

4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B

1. Maintain the following conditions for at least 10 consecutive seconds.

Revision: 2008 October EC-156 2009 Murano

 P0101 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

ENG SPEED More than 2,000 rpm A

TP SEN 1-B1 More than 1.5 V
TP SEN 2-B1 More than 1.5 V
EC
Selector lever Suitable position
Driving vehicle uphill (Increased engine load) will help
Driving location
maintain the driving conditions required for this test.
C
CAUTION:
Always drive vehicle at a safe speed.
2. Check 1st trip DTC. D
Is 1st trip DTC detected?
YES >> Go to EC-157, "Diagnosis Procedure".
NO >> INSPECTION END E
5.PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B
Perform component function check. Refer to EC-157, "Component Function Check".
NOTE: F
Use component function check to check the overall function of the mass air flow sensor circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal? G
YES >> INSPECTION END
NO >> Go to EC-157, "Diagnosis Procedure".
H
Component Function Check INFOID:0000000003387956

1.PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

I
With GST
1. Start engine and warm it up to normal operating temperature.
2. Select Service $01 with GST.
J
3. Check the mass air flow sensor signal with Service $01.
4. Check for linear mass air flow sensor signal value rise in
response to increases to about 4,000 rpm in engine speed.
Is the inspection result normal? K
YES >> INSPECTION END
NO >> Go to EC-157, "Diagnosis Procedure".
L

M
SEF534P

Diagnosis Procedure INFOID:0000000003387957

N
1.INSPECTION START
Confirm the detected malfunction (A or B). Refer to EC-154, "DTC Logic".
Which malfunction is detected? O
A >> GO TO 3.
B >> GO TO 2.
2.CHECK INTAKE SYSTEM P

Check the following for connection.

Air duct
Vacuum hoses
Intake air passage between air duct and intake manifold
Is the inspection result normal?
YES >> GO TO 3.

Revision: 2008 October EC-157 2009 Murano

 P0101 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Reconnect the parts.
3.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace ground connection.
4.CHECK MAF SENSOR POWER SUPPLY CIRCUIT
1. Disconnect mass air flow (MAF) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between MAF sensor harness connector and ground.

MAF sensor
Ground Voltage
Connector Terminal
F4 5 Ground Battery voltage
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E7, F121
Harness for open or short between mass air flow sensor and ECM
Harness for open or short between mass air flow sensor and IPDM E/R

>> Repair open circuit, 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 the continuity between MAF sensor harness connector and ECM harness connector.

MAF sensor ECM

Continuity
Connector Terminal Connector Terminal
F4 4 F8 56 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
7.CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between MAF sensor harness connector and ECM harness connector.

MAF sensor ECM

Continuity
Connector Terminal Connector Terminal
F4 3 F8 58 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK INTAKE AIR TEMPERATURE SENSOR
Revision: 2008 October EC-158 2009 Murano
 P0101 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Refer to EC-168, "Component Inspection".
Is the inspection result normal? A
YES >> GO TO 9.
NO >> Replace mass air flow sensor (with intake air temperature sensor).
9.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR EC

Refer to EC-302, "Component Inspection".

Is the inspection result normal? C
YES >> GO TO 10.
NO >> Replace EVAP control system pressure sensor.
10.CHECK MASS AIR FLOW SENSOR D
Refer to EC-159, "Component Inspection".
Is the inspection result normal?
E
YES >> GO TO 11.
NO >> Replace mass air flow sensor.
11.CHECK INTERMITTENT INCIDENT F
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END G

Component Inspection INFOID:0000000003387958

H
1.CHECK MASS AIR FLOW SENSOR-I
With CONSULT-III
1. Reconnect all harness connectors disconnected. I
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT-III and select DATA MONITOR mode.
4. Select MAS A/F SE-B1 and check indication under the following conditions.
J

Monitor item Condition MAS A/F SE-B1 (V)

Ignition switch ON (Engine stopped.) Approx. 0.4 K
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
MAS A/F SE-B1
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
L

*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Without CONSULT-III
M
1. Reconnect all harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check the voltage between ECM harness connector terminals under the following conditions.
N

ECM
O
+ Condition Voltage (V)
Connector
Terminal Terminal
Ignition switch ON (Engine stopped.) Approx. 0.4 P
58 56 Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
F8 (MAF sen- (Sensor
sor signal) ground) 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END

Revision: 2008 October EC-159 2009 Murano

 P0101 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> GO TO 2.
2.CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
Crushed air ducts
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system parts
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK MASS AIR FLOW SENSOR-II
With CONSULT-III
1. Repair or replace malfunctioning part.
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT-III and select DATA MONITOR mode.
4. Select MAS A/F SE-B1 and check indication under the following conditions.

Monitor item Condition MAS A/F SE-B1 (V)

Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
MAS A/F SE-B1
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Without CONSULT-III
1. Repair or replace malfunctioning part.
2. Start engine and warm it up to normal operating temperature.
3. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage (V)
Connector
Terminal Terminal
Ignition switch ON (Engine stopped.) Approx. 0.4
58 56 Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
F8 (MAF sen- (Sensor
sor signal) ground) 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK MASS AIR FLOW SENSOR-III
With CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector and reconnect it again.
3. Start engine and warm it up to normal operating temperature.
4. Connect CONSULT-III and select DATA MONITOR mode.
5. Select MAS A/F SE-B1 and check indication under the following conditions.

Revision: 2008 October EC-160 2009 Murano

 P0101 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

Monitor item Condition MAS A/F SE-B1 (V) A

Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
MAS A/F SE-B1 EC
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm. C
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector and reconnect it again. D
3. Start engine and warm it up to normal operating temperature.
4. Check the voltage between ECM harness connector terminals under the following conditions.
E

ECM
+ Condition Voltage (V) F
Connector
Terminal Terminal
Ignition switch ON (Engine stopped.) Approx. 0.4
58 56 Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
G
F8 (MAF sen- (Sensor
sor signal) ground) 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4* H
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END I
NO >> Clean or replace mass air flow sensor.

Revision: 2008 October EC-161 2009 Murano

 P0102, P0103 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0102, P0103 MAF SENSOR
Description INFOID:0000000003591558

The mass air flow sensor (1) is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. The mass air flow sensor controls the temperature of the
hot wire to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The greater air flow, the
greater the heat loss.
Therefore, the electric current supplied to hot wire is changed to
maintain the temperature of the hot wire as air flow increases. The
ECM detects the air flow by means of this current change.

PBIA9559J

DTC Logic INFOID:0000000003387960

DTC DETECTION LOGIC

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
Harness or connectors
Mass air flow sensor An excessively low voltage from the sensor is sent (The sensor circuit is open or shorted.)
P0102
circuit low input to ECM. Intake air leakage
Mass air flow sensor
Harness or connectors
Mass air flow sensor An excessively high voltage from the sensor is
P0103 (The sensor circuit is open or shorted.)
circuit high input sent to ECM.
Mass air flow sensor

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
Which DTC is detected?
P0102 >> GO TO 2.
P0103 >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0102
1. Start engine and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-163, "Diagnosis Procedure".
NO >> INSPECTION END
3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-I
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-163, "Diagnosis Procedure".
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-II
1. Start engine and wait at least 5 seconds.
2. Check DTC.

Revision: 2008 October EC-162 2009 Murano

 P0102, P0103 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Is DTC detected?
YES >> Go to EC-163, "Diagnosis Procedure". A
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387961
EC
1.INSPECTION START
Confirm the detected DTC. C
Which DTC is detected?
P0102 >> GO TO 2.
P0103 >> GO TO 3. D
2.CHECK INTAKE SYSTEM
Check the following for connection.
Air duct E
Vacuum hoses
Intake air passage between air duct to intake manifold
Is the inspection result normal? F
YES >> GO TO 3.
NO >> Reconnect the parts.
3.CHECK GROUND CONNECTION G

1. Turn ignition switch OFF.

2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
H
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace ground connection.
I
4.CHECK MAF SENSOR POWER SUPPLY CIRCUIT
1. Disconnect mass air flow (MAF) sensor harness connector.
2. Turn ignition switch ON. J
3. Check the voltage between MAF sensor harness connector and ground.

MAF sensor K
Ground Voltage
Connector Terminal
F4 5 Ground Battery voltage
L
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
M
5.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E7, F121 N
Harness for open or short between mass air flow sensor and ECM
Harness for open or short between mass air flow sensor and IPDM E/R
O
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
P
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between MAF sensor harness connector and ECM harness connector.

Revision: 2008 October EC-163 2009 Murano

 P0102, P0103 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

MAF sensor ECM

Continuity
Connector Terminal Connector Terminal
F4 4 F8 56 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
7.CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between MAF sensor harness connector and ECM harness connector.

MAF sensor ECM

Continuity
Connector Terminal Connector Terminal
F4 3 F8 58 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK MASS AIR FLOW SENSOR
Refer to EC-164, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace mass air flow sensor.
9.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003591559

1.CHECK MASS AIR FLOW SENSOR-I

With CONSULT-III
1. Reconnect all harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT-III and select DATA MONITOR mode.
4. Select MAS A/F SE-B1 and check indication under the following conditions.

Monitor item Condition MAS A/F SE-B1 (V)

Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
MAS A/F SE-B1
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Without CONSULT-III
1. Reconnect all harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check the voltage between ECM harness connector terminals under the following conditions.

Revision: 2008 October EC-164 2009 Murano

 P0102, P0103 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
+ Condition Voltage (V)
Connector
Terminal Terminal
EC
Ignition switch ON (Engine stopped.) Approx. 0.4
58 56 Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
F8 (MAF sen- (Sensor
sor signal) ground) 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9 C
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
D
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
E
2.CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
Crushed air ducts F
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system parts
G
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3. H
3.CHECK MASS AIR FLOW SENSOR-II
With CONSULT-III
1. Repair or replace malfunctioning part. I
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT-III and select DATA MONITOR mode.
4. Select MAS A/F SE-B1 and check indication under the following conditions. J

Monitor item Condition MAS A/F SE-B1 (V)

Ignition switch ON (Engine stopped.) Approx. 0.4 K
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
MAS A/F SE-B1
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
L
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Without CONSULT-III M
1. Repair or replace malfunctioning part.
2. Start engine and warm it up to normal operating temperature.
3. Check the voltage between ECM harness connector terminals under the following conditions.
N

ECM
O
+ Condition Voltage (V)
Connector
Terminal Terminal
Ignition switch ON (Engine stopped.) Approx. 0.4 P
58 56 Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
F8 (MAF sen- (Sensor
sor signal) ground) 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Is the inspection result normal?

Revision: 2008 October EC-165 2009 Murano

 P0102, P0103 MAF SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK MASS AIR FLOW SENSOR-III
With CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector and reconnect it again.
3. Start engine and warm it up to normal operating temperature.
4. Connect CONSULT-III and select DATA MONITOR mode.
5. Select MAS A/F SE-B1 and check indication under the following conditions.

Monitor item Condition MAS A/F SE-B1 (V)

Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
MAS A/F SE-B1
2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector and reconnect it again.
3. Start engine and warm it up to normal operating temperature.
4. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage (V)
Connector
Terminal Terminal
Ignition switch ON (Engine stopped.) Approx. 0.4
58 56 Idle (Engine is warmed-up to normal operating temperature.) 0.9 - 1.2
F8 (MAF sen- (Sensor
sor signal) ground) 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9
Idle to approximately 4,000 rpm 0.9 - 1.2 to Approx. 2.4*
*: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Clean or replace mass air flow sensor.

Revision: 2008 October EC-166 2009 Murano

 P0112, P0113 IAT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0112, P0113 IAT SENSOR
A
Description INFOID:0000000003387963

The intake air temperature sensor is built-into the mass air flow sen- EC
sor (1). The sensor detects intake air temperature and transmits a
signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the thermistor C
decreases in response to the rise in temperature.

PBIA9559J E

<Reference data>
F
Intake air temperature
Voltage* (V) Resistance (k)
[C (F)]
25 (77) 3.3 1.800 - 2.200 G
80 (176) 1.2 0.283 - 0.359
*: These data are reference values and are measured between ECM terminals 50
(Intake air temperature sensor) and 56 (Sensor ground). H

SEF012P

I
DTC Logic INFOID:0000000003387964

DTC DETECTION LOGIC

J
Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
Intake air tempera-
K
An excessively low voltage from the sensor is
P0112 ture sensor circuit
sent to ECM. Harness or connectors
low input
(The sensor circuit is open or shorted.)
Intake air tempera- L
An excessively high voltage from the sensor is Intake air temperature sensor
P0113 ture sensor circuit
sent to ECM.
high input

DTC CONFIRMATION PROCEDURE M

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- N
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. O
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2. P
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-168, "Diagnosis Procedure".
NO >> INSPECTION END

Revision: 2008 October EC-167 2009 Murano

 P0112, P0113 IAT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Diagnosis Procedure INFOID:0000000003387965

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect mass air flow sensor (with intake air temperature sensor) harness connector.
2. Turn ignition switch ON.
3. Check the voltage between mass air flow sensor harness connector and ground.

MAF sensor
Ground Voltage
Connector Terminal
F4 2 Ground Approx. 5 V
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.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 mass air flow sensor harness connector and ECM harness connector.

MAF sensor ECM

Continuity
Connector Terminal Connector Terminal
F4 1 F8 56 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK INTAKE AIR TEMPERATURE SENSOR
Refer to EC-168, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace mass air flow sensor (with intake air temperature sensor).
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003387966

1.CHECK INTAKE AIR TEMPERATURE SENSOR

1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector.
3. Check resistance between mass air flow sensor terminals as per the following.

Revision: 2008 October EC-168 2009 Murano

 P0112, P0113 IAT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

Terminal Condition Resistance (k) A

1 and 2 Temperature [C (F)] 25 (77) 1.800 - 2.200
Is the inspection result normal? EC
YES >> INSPECTION END
NO >> Replace mass air flow sensor (with intake air temperature sensor).
C

Revision: 2008 October EC-169 2009 Murano

 P0116 ECT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0116 ECT SENSOR
Description INFOID:0000000003387967

The engine coolant temperature sensor is used to detect the engine

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

SEF594K

<Reference data>

Engine coolant temperature

Voltage* (V) Resistance (k)
[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 terminals 46
SEF012P
(Engine coolant temperature sensor) and 52 (Sensor ground).

DTC Logic INFOID:0000000003544736

DTC DETECTION LOGIC

NOTE:
If DTC P0116 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117,
P0118. Refer to EC-172, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Engine coolant temperature signal from engine
Engine coolant temper- Harness or connectors
coolant temperature sensor does not fluctuate,
P0116 ature sensor circuit (High or low resistance in the circuit)
even when some time has passed after starting
range/performance Engine coolant temperature sensor
the engine with pre-warming up condition.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TEST CONDITION:
Before performing the following procedure, do not add fuel.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and warm it up to normal operating temperature.
2. Rev engine up to 2,000 rpm for more than 10 minutes.
3. Move the vehicle to a cool place, then stop engine and turn ignition switch OFF.

Revision: 2008 October EC-170 2009 Murano

 P0116 ECT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Check resistance between fuel level sensor unit and fuel pump terminals 4 and 5.
5. Soak the vehicle until the resistance between fuel level sensor unit and fuel pump terminals 4 and 5 A
becomes 0.5 k higher than the value measured before soaking.
CAUTION:
Never turn ignition switch ON during soaking.
EC
NOTE:
Soak time changes depending on ambient air temperature. It may take several hours.
6. Start engine and let it idle for 5 minutes.
7. Check 1st trip DTC. C
Is 1st trip DTC detected?
YES >> EC-171, "Diagnosis Procedure"
NO >> INSPECTION END D

Diagnosis Procedure INFOID:0000000003544737

1.CHECK GROUND CONNECTION E

1. Turn ignition switch OFF.

2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
F
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. G
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-171, "Component Inspection".
H
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace engine coolant temperature sensor.
I
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
J
>> INSPECTION END
Component Inspection INFOID:0000000003387970
K
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Turn ignition switch OFF. L
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor.
4. Check resistance between engine coolant temperature sensor
terminals as per the following. M

Terminals Condition Resistance (k)

N
20 (68) 2.1 - 2.9
1 and 2 Temperature [C (F)] 50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260 O
Is the inspection result normal?
YES >> INSPECTION END JMBIA0080ZZ
NO >> Replace engine coolant temperature sensor. P

Revision: 2008 October EC-171 2009 Murano

 P0117, P0118 ECT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0117, P0118 ECT SENSOR
Description INFOID:0000000003625295

The engine coolant temperature sensor is used to detect the engine

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

SEF594K

<Reference data>

Engine coolant temperature

Voltage* (V) Resistance (k)
[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 terminals 46
SEF012P
(Engine coolant temperature sensor) and 52 (Sensor ground).

DTC Logic INFOID:0000000003387968

DTC DETECTION LOGIC

Trouble Diagnosis
DTC No. DTC detecting condition Possible Cause
Name
Engine coolant tem-
An excessively low voltage from the sensor is
P0117 perature sensor cir-
sent to ECM. Harness or connectors
cuit low input
(The sensor circuit is open or shorted.)
Engine coolant tem- Engine coolant temperature sensor
An excessively high voltage from the sensor is
P0118 perature sensor cir-
sent to ECM.
cuit high input

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-173, "Diagnosis Procedure".
NO >> INSPECTION END

Revision: 2008 October EC-172 2009 Murano

 P0117, P0118 ECT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Diagnosis Procedure INFOID:0000000003387969

A
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection". EC
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. C

2.CHECK ECT SENSOR POWER SUPPLY CIRCUIT

1. Disconnect engine coolant temperature (ECT) sensor harness connector. D
2. Turn ignition switch ON.
3. Check the voltage between ECT sensor harness connector and ground.
E
ECT sensor
Ground Voltage
Connector Terminal
F80 1 Ground Approx. 5 V F
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. G

3.CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF. H
2. Disconnect ECM harness connector.
3. Check the continuity between ECT sensor harness connector and ECM harness connector.
I
ECT sensor ECM
Continuity
Connector Terminal Connector Terminal
F80 2 F8 52 Existed J
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
K
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK ENGINE COOLANT TEMPERATURE SENSOR L
Refer to EC-173, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 5. M
NO >> Replace engine coolant temperature sensor.
5.CHECK INTERMITTENT INCIDENT N
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END O

Component Inspection INFOID:0000000003625296

1.CHECK ENGINE COOLANT TEMPERATURE SENSOR P

1. Turn ignition switch OFF.

2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor.

Revision: 2008 October EC-173 2009 Murano

 P0117, P0118 ECT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Check resistance between engine coolant temperature sensor
terminals as per the following.

Terminals Condition Resistance (k)

20 (68) 2.1 - 2.9
1 and 2 Temperature [C (F)] 50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Is the inspection result normal?
YES >> INSPECTION END JMBIA0080ZZ
NO >> Replace engine coolant temperature sensor.

Revision: 2008 October EC-174 2009 Murano

 P0122, P0123 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0122, P0123 TP SENSOR
A
Description INFOID:0000000003387971

Electric throttle control actuator consists of throttle control motor, EC

throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into C
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to D
driving conditions via the throttle control motor.

PBIB0145E E
DTC Logic INFOID:0000000003387972

DTC DETECTION LOGIC F

NOTE:
If DTC P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-347, "DTC Logic". G

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Throttle position sensor An excessively low voltage from the TP sensor H
P0122 Harness or connectors
2 circuit low input 2 is sent to ECM. (TP sensor 2 circuit is open or shorted.)
Throttle position sensor An excessively high voltage from the TP sensor Electric throttle control actuator
P0123 (TP sensor 2)
2 circuit high input 2 is sent to ECM. I

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING J
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. K
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION: L
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 2. M
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC. N
Is DTC detected?
YES >> Go to EC-175, "Diagnosis Procedure".
NO >> INSPECTION END O

Diagnosis Procedure INFOID:0000000003387973

P
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.

Revision: 2008 October EC-175 2009 Murano

 P0122, P0123 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

2.CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT

1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
3. Check the voltage between electric throttle control actuator harness connector and ground.

Electric throttle control actuator

Ground Voltage
Connector Terminal
F29 1 Ground Approx. 5 V
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, 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 the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

Electric throttle control actuator ECM

Continuity
Connector Terminal Connector Terminal
F29 4 F8 36 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, 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 the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

Electric throttle control actuator ECM

Continuity
Connector Terminal Connector Terminal
F29 3 F8 38 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK THROTTLE POSITION SENSOR
Refer to EC-177, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Refer to EC-177, "Special Repair Requirement".

>> INSPECTION END

7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

Revision: 2008 October EC-176 2009 Murano

 P0122, P0123 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
>> INSPECTION END
A
Component Inspection INFOID:0000000003387974

1.CHECK THROTTLE POSITION SENSOR EC

1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Perform EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
4. Turn ignition switch ON. C
5. Set selector lever to D position.
6. Check the voltage between ECM harness connector terminals under the following conditions.
D
ECM
+ Condition Voltage
Connector E
Terminal Terminal
37 Fully released More than 0.36 V
(TP sensor 1 sig-
nal) Fully depressed Less than 4.75 V F
36
F8 Accelerator pedal
38 (Sensor ground) Fully released Less than 4.75 V
(TP sensor 2 sig-
nal) Fully depressed More than 0.36 V G
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2. H

2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator. I
2. Go to EC-177, "Special Repair Requirement".

>> INSPECTION END J

Special Repair Requirement INFOID:0000000003387975

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING K

Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
L
>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
M
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END
N

Revision: 2008 October EC-177 2009 Murano

 P0125 ECT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0125 ECT SENSOR
Description INFOID:0000000003624712

The engine coolant temperature sensor is used to detect the engine

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

SEF594K

<Reference data>

Engine coolant temperature

Voltage* (V) Resistance (k)
[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 terminals 46
SEF012P
(Engine coolant temperature sensor) and 52 (Sensor ground).

DTC Logic INFOID:0000000003387977

DTC DETECTION LOGIC

NOTE:
If DTC P0125 is displayed with P0116, first perform the trouble diagnosis for DTC P0116. Refer to EC-
170, "DTC Logic".
If DTC P0125 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117,
P0118. Refer to EC-172, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Voltage sent to ECM from the sensor is not
Harness or connectors
Insufficient engine cool- practical, even when some time has passed
(High resistance in the circuit)
P0125 ant temperature for after starting the engine.
Engine coolant temperature sensor
closed loop fuel control Engine coolant temperature is insufficient for
Thermostat
closed loop fuel control.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR FUNCTION
With CONSULT-III
1. Turn ignition switch ON.

Revision: 2008 October EC-178 2009 Murano

 P0125 ECT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Select DATA MONITOR mode with CONSULT-III.
3. Check that COOLAN TEMP/S is above 10C (50F). A
With GST
Follow the procedure With CONSULT-III above.
Is the temperature above 10C (50F)? EC
YES >> INSPECTION END
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE C

With CONSULT-III
1. Start engine and run it for 65 minutes at idle speed.
If COOLAN TEMP/S increases to more than 10C (50F) within 65 minutes, stop engine because D
the test result will be OK.
CAUTION:
Never overheat engine. E
2. Check 1st trip DTC.
With GST
Follow the procedure With CONSULT-III above.
F
Is 1st trip DTC detected?
YES >> EC-179, "Diagnosis Procedure"
NO >> INSPECTION END G
Diagnosis Procedure INFOID:0000000003387978

1.CHECK GROUND CONNECTION H

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal? I
YES >> GO TO 2.
NO >> Repair or replace ground connection.
J
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-179, "Component Inspection".
Is the inspection result normal? K
YES >> GO TO 3.
NO >> Replace engine coolant temperature sensor.
3.CHECK THERMOSTAT OPERATION L

When the engine is cold [lower than 70C (158F)] condition, grasp lower radiator hose and confirm that the
engine coolant does not flow.
M
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace thermostat. Refer to CO-23, "Removal and Installation".
N
4.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
O

>> INSPECTION END

P
Component Inspection INFOID:0000000003591570

1.CHECK ENGINE COOLANT TEMPERATURE SENSOR

1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor.

Revision: 2008 October EC-179 2009 Murano

 P0125 ECT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Check resistance between engine coolant temperature sensor
terminals as per the following.

Terminals Condition Resistance (k)

20 (68) 2.1 - 2.9
1 and 2 Temperature [C (F)] 50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Is the inspection result normal?
YES >> INSPECTION END JMBIA0080ZZ
NO >> Replace engine coolant temperature sensor.

Revision: 2008 October EC-180 2009 Murano

 P0127 IAT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0127 IAT SENSOR
A
Description INFOID:0000000003591562

The intake air temperature sensor is built-into the mass air flow sen- EC
sor (1). The sensor detects intake air temperature and transmits a
signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the thermistor C
decreases in response to the rise in temperature.

PBIA9559J E

<Reference data>
F
Intake air temperature
Voltage* (V) Resistance (k)
[C (F)]
25 (77) 3.3 1.800 - 2.200 G
80 (176) 1.2 0.283 - 0.359
*: These data are reference values and are measured between ECM terminals 50
(Intake air temperature sensor) and 56 (Sensor ground). H

SEF012P

I
DTC Logic INFOID:0000000003387981

DTC DETECTION LOGIC

J

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Rationally incorrect voltage from the sensor is Harness or connectors K
Intake air temperature
P0127 sent to ECM, compared with the voltage signal (The sensor circuit is open or shorted)
too high
from engine coolant temperature sensor. Intake air temperature sensor

DTC CONFIRMATION PROCEDURE L

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- M
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. N
TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road
test is expected to be easier, it is unnecessary to lift the vehicle. O

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE P

With CONSULT-III
1. Wait until engine coolant temperature is less than 90C (194F)
- Turn ignition switch ON.
- Select DATA MONITOR mode with CONSULT-III.
- Check the engine coolant temperature.

Revision: 2008 October EC-181 2009 Murano

 P0127 IAT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
- If the engine coolant temperature is not less than 90C (194F), turn ignition switch OFF and cool down
engine.
NOTE:
Perform the following steps before engine coolant temperature is above 90C (194F).
2. Turn ignition switch ON.
3. Select DATA MONITOR mode with CONSULT-III.
4. Start engine.
5. Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.
6. Check 1st trip DTC.
With GST
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> Go to EC-182, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387982

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK INTAKE AIR TEMPERATURE SENSOR
Refer to EC-182, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace mass air flow sensor (with intake air temperature sensor).
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003591563

1.CHECK INTAKE AIR TEMPERATURE SENSOR

1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor harness connector.
3. Check resistance between mass air flow sensor terminals as per the following.

Terminal Condition Resistance (k)

1 and 2 Temperature [C (F)] 25 (77) 1.800 - 2.200
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace mass air flow sensor (with intake air temperature sensor).

Revision: 2008 October EC-182 2009 Murano

 P0128 THERMOSTAT FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
P0128 THERMOSTAT FUNCTION
A
DTC Logic INFOID:0000000003387984

DTC DETECTION LOGIC EC

NOTE:
If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303, P0304, P0305 or P0306, first perform
the trouble diagnosis for DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306. Refer to EC-251, C
"DTC Logic".
Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long
enough.
This is due to a leakage in the seal or the thermostat being stuck open. D

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
E
Thermostat
The engine coolant temperature does not reach
Leakage from sealing portion of thermo-
P0128 Thermostat function to specified temperature even though the en-
stat
gine has run long enough.
Engine coolant temperature sensor F
DTC CONFIRMATION PROCEDURE
NOTE:
Check vehicle specifications and VIN, then select the procedure to be performed. (Refer to the table below.) G

Vehicle specification Vehicle serial number TYPE

H
Up to JN8AZ18U*9W100000 A
From JN8AZ18U*9W100001 B
2WD
Up to JN8AZ18U*9W710000 A I
From JN8AZ18U*9W710001 B
Up to JN8AZ18W*9W200000 A
J
From JN8AZ18W*9W200001 B
4WD
Up to JN8AZ18W*9W810000 A
From JN8AZ18W*9W810001 B K
TYPE A
1.PRECONDITIONING L
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. M
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
For best results, perform at ambient temperature of 10C (14F) or higher. N
For best results, perform at engine coolant temperature of 10C (14F) to 56C (133F).
Before performing the following procedure, do not add fuel.
O
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE P
With CONSULT-III
1. Turn A/C switch OFF.
2. Turn blower fan switch OFF.
3. Turn ignition switch ON.
4. Select COOLAN TEMP/S in DATA MONITOR mode with CONSULT-III.
5. Check the indication of COOLAN TEMP/S
If it is below 56C (133F), go to next step.

Revision: 2008 October EC-183 2009 Murano

 P0128 THERMOSTAT FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
If it is above 56C (133F), cool down the engine to less than 56C (133F). Then go to next steps.
6. Start engine.
7. Wait at idle for at least 30 minutes.
If COOLAN TEMP/S increases to more than 75C (167F) within 30 minutes, turn ignition switch
OFF because the test result will be OK.
8. Check 1st trip DTC.
With GST
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> Go to EC-184, "Diagnosis Procedure".
NO >> INSPECTION END
TYPE B
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
For best results, perform at ambient temperature of 10C (14F) or higher.
For best results, perform at engine coolant temperature of 10C (14F) to 56C (133F).
Before performing the following procedure, do not add fuel.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn A/C switch OFF.
2. Turn blower fan switch OFF.
3. Turn ignition switch ON.
4. Select COOLAN TEMP/S in DATA MONITOR mode with CONSULT-III.
5. Check the indication of COOLAN TEMP/S
If it is below 56C (133F), go to next step.
If it is above 56C (133F), cool down the engine to less than 56C (133F). Then go to next steps.
6. Start engine.
7. Drive vehicle for 10 consecutive minutes under the following conditions.

VHCL SPEED SE More than 56 km/h (35 MPH)

CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If COOLAN TEMP/S increases to more than 75C (167F) within 10 minutes, turn ignition switch
OFF because the test result will be OK.
8. Check 1st trip DTC.
With GST
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> Go to EC-184, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387985

1.CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to EC-185, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 2.

Revision: 2008 October EC-184 2009 Murano

 P0128 THERMOSTAT FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Replace engine coolant temperature sensor.
2.CHECK THERMOSTAT A

Check thermostat. Refer to CO-23, "Removal and Installation".

Is the inspection result normal? EC
YES >> INSPECTION END
NO >> Replace thermostat.
Component Inspection INFOID:0000000003387986 C

1.CHECK ENGINE COOLANT TEMPERATURE SENSOR

D
1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor.
4. Check resistance between engine coolant temperature sensor E
terminals as per the following.

Terminals Condition Resistance (k) F

20 (68) 2.1 - 2.9
1 and 2 Temperature [C (F)] 50 (122) 0.68 - 1.00
G
90 (194) 0.236 - 0.260
Is the inspection result normal?
YES >> INSPECTION END JMBIA0080ZZ H
NO >> Replace engine coolant temperature sensor.

Revision: 2008 October EC-185 2009 Murano

 P0130, P0150 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
P0130, P0150 A/F SENSOR 1
Description INFOID:0000000003387987

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
JMBIA0112GB

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 800C (1,472F).

PBIB3354E

DTC Logic INFOID:0000000003387988

DTC DETECTION LOGIC

To judge malfunctions, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 sig-
nal fluctuates according to fuel feedback control.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
The A/F signal computed by ECM from the A/F
A) sensor 1 signal is constantly in a range other Harness or connectors
Air fuel ratio (A/F) sensor 1 than approx. 2.2 V. (The A/F sensor 1 circuit is open
P0130
(bank 1) circuit or shorted.)
The A/F signal computed by ECM from the A/F A/F sensor 1
B)
sensor 1 signal is constantly approx. 2.2 V.
The A/F signal computed by ECM from the A/F
A) sensor 1 signal is constantly in a range other Harness or connectors
Air fuel ratio (A/F) sensor 1 than approx. 2.2 V. (The A/F sensor 1 circuit is open
P0150
(bank 2) circuit or shorted.)
The A/F signal computed by ECM from the A/F A/F sensor 1
B)
sensor 1 signal is constantly approx. 2.2 V.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

>> GO TO 2.

Revision: 2008 October EC-186 2009 Murano

 P0130, P0150 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]

2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A A

1. Start engine and warm it up to normal operating temperature.
2. Let engine idle for 2 minutes.
3. Check 1st trip DTC.
EC
Is 1st trip DTC detected?
YES >> Go to EC-188, "Diagnosis Procedure".
NO-1 >> With CONSULT-III: GO TO 3.
C
NO-2 >> With GST: GO TO 7.
3.CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION
1. Start engine and warm it up to normal operating temperature. D
2. Select A/F SEN1 (B1) or A/F SEN1 (B2) in DATA MONITOR mode with CONSULT-III.
3. Check A/F SEN1 (B1) or A/F SEN1 (B2) indication.
Does the indication fluctuate around 2.2 V? E
YES >> GO TO 4.
NO >> Go to EC-188, "Diagnosis Procedure".
4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-I F
1. Select A/F SEN1 (B1) P1276 (for DTC P0130) or A/F SEN1 (B2) P1286 (for DTC P0150) of A/F
SEN1 in DTC WORK SUPPORT mode with CONSULT-III.
2. Touch START. G
3. When the following conditions are met, TESTING will be displayed on the CONSULT-III screen.

ENG SPEED 1,000 - 3,200 rpm H

VHCL SPEED SE More than 64 km/h (40 mph)
B/FUEL SCHDL 1.0 - 8.0 msec
I
Selector lever D position
If TESTING is not displayed after 20 seconds, retry from step 2.
CAUTION: J
Always drive vehicle at a safe speed.
Is TESTING displayed on CONSULT-III screen?
YES >> GO TO 5. K
NO >> Check A/F sensor 1 function again. GO TO 3.
5.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-II
L
Release accelerator pedal fully.
NOTE:
Never apply brake when releasing the accelerator pedal.
Which does TESTING change to? M
COMPLETED>>GO TO 6.
OUT OF CONDITION>>Retry DTC CONFIRMATION PROCEDURE. GO TO 4.
6.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-III N

Touch SELF-DIAG RESULT.

Which is displayed on CONSULT-III screen? O
OK >> INSPECTION END
NG >> Go to EC-188, "Diagnosis Procedure".
7.PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B P
Perform component function check. Refer to EC-188, "Component Function Check".
NOTE:
Use component function check to check the overall function of the A/F sensor 1 circuit. During this check, a
1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END

Revision: 2008 October EC-187 2009 Murano

 P0130, P0150 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Go to EC-188, "Diagnosis Procedure".
Component Function Check INFOID:0000000003387989

1.PERFORM COMPONENT FUNCTION CHECK

With GST
1. Start engine and warm it up to normal operating temperature.
2. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.
3. Shift the selector lever to the D position, then release the accelerator pedal fully until the vehicle speed
decreases to 50 km/h (31 MPH).
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
Never apply brake when releasing the accelerator pedal.
4. Repeat steps 2 and 3 for 5 times.
5. Stop the vehicle and turn ignition switch OFF.
6. Wait at least 10 seconds and restart engine.
7. Repeat steps 2 and 3 for 5 times.
8. Stop the vehicle.
9. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-188, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387990

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect A/F sensor 1 harness connector.
2. Turn ignition switch ON.
3. Check the voltage between A/F sensor 1 harness connector and ground.

A/F sensor 1
DTC Ground Voltage
Bank Connector Terminal
P0130 1 F27 4
Ground Battery voltage
P0150 2 F64 4
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
IPDM E/R harness connector F12
15 A fuse (No. 46)
Harness for open or short between A/F sensor 1 and IPDM E/R

>> Repair or replace harness or connectors.

4.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.

Revision: 2008 October EC-188 2009 Murano

 P0130, P0150 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
A
A/F sensor 1 ECM
DTC Continuity
Bank Connector Terminal Connector Terminal
EC
1 45
P0130 1 F27
2 49
F8 Existed
1 53 C
P0150 2 F64
2 57
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground. D

A/F sensor 1
DTC Ground Continuity E
Bank Connector Terminal
1
P0130 1 F27
2 F
Ground Not existed
1
P0150 2 F64
2
G
ECM
DTC Ground Continuity
Connector Terminal H
45
P0130
49
F8 Ground Not existed
53 I
P0150
57
5. Also check harness for short to power. J
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. K
5.CHECK INTERMITTENT INCIDENT
Perform GI-40, "Intermittent Incident".
L
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace malfunctioning part.
M
6.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION: N
Discard any A/F 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 A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant O
(commercial service tool).

>> INSPECTION END P

Revision: 2008 October EC-189 2009 Murano

 P0131, P0151 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
P0131, P0151 A/F SENSOR 1
Description INFOID:0000000003591590

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
JMBIA0112GB

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 800C (1,472F).

PBIB3354E

DTC Logic INFOID:0000000003387992

DTC DETECTION LOGIC

To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately low.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Air fuel ratio (A/F) sensor 1 Harness or connectors
P0131
(bank 1) circuit low voltage The A/F signal computed by ECM from the A/ (The A/F sensor 1 circuit is open or
Air fuel ratio (A/F) sensor 1 F sensor 1 signal is constantly approx. 0 V. shorted.)
P0151 A/F sensor 1
(bank 2) circuit low voltage

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.

>> GO TO 2.
2.CHECK A/F SENSOR 1 FUNCTION
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select A/F SEN1 (B1) or A/F SEN1 (B2) in DATA MONITOR mode with CONSULT-III.
3. Check A/F SEN1 (B1) or A/F SEN1 (B2) indication.

Revision: 2008 October EC-190 2009 Murano

 P0131, P0151 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
With GST
Follow the procedure With CONSULT-III above. A
Is the indication constantly approx. 0 V?
YES >> Go to EC-191, "Diagnosis Procedure".
NO >> GO TO 3. EC
3.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III C
1. Turn ignition switch OFF, wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF, wait at least 10 seconds and then restart engine.
4. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine. D
CAUTION:
Always drive vehicle at a safe speed.
5. Maintain the following conditions for approximately 20 consecutive seconds. E

ENG SPEED 1,000 - 3,200 rpm

VHCL SPEED SE More than 40 km/h (25 mph) F
B/FUEL SCHDL 1.5 - 9.0 msec
Selector lever Suitable position
G
NOTE:
Keep the accelerator pedal as steady as possible during cruising.
If this procedure is not completed within 1 minute after restarting engine at step 1, return to step
H
1.
6. Check 1st trip DTC.
With GST
Follow the procedure With CONSULT-III above. I
Is 1st trip DTC detected?
YES >> Go to EC-191, "Diagnosis Procedure".
NO >> INSPECTION END J

Diagnosis Procedure INFOID:0000000003387993

K
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection". L
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. M
2.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect A/F sensor 1 harness connector.
2. Turn ignition switch ON. N
3. Check the voltage between A/F sensor 1 harness connector and ground.

A/F sensor 1 O
DTC Ground Voltage
Bank Connector Terminal
P0131 1 F27 4
Ground Battery voltage P
P0151 2 F64 4
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.

Revision: 2008 October EC-191 2009 Murano

 P0131, P0151 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
IPDM E/R harness connector F12
15 A fuse (No. 46)
Harness for open or short between A/F sensor 1 and IPDM E/R

>> Repair or replace harness or connectors.

4.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

A/F sensor 1 ECM

DTC Continuity
Bank Connector Terminal Connector Terminal
1 45
P0131 1 F27
2 49
F8 Existed
1 53
P0151 2 F64
2 57
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.

A/F sensor 1
DTC Ground Continuity
Bank Connector Terminal
1
P0131 1 F27
2
Ground Not existed
1
P0151 2 F64
2

ECM
DTC Ground Continuity
Connector Terminal
45
P0131
49
F8 Ground Not existed
53
P0151
57
5. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Perform GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace malfunctioning part.
6.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
Discard any A/F 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 A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

Revision: 2008 October EC-192 2009 Murano

 P0131, P0151 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]

>> INSPECTION END A

EC

Revision: 2008 October EC-193 2009 Murano

 P0132, P0152 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
P0132, P0152 A/F SENSOR 1
Description INFOID:0000000003591591

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
JMBIA0112GB

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 800C (1,472F).

PBIB3354E

DTC Logic INFOID:0000000003387995

DTC DETECTION LOGIC

To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately high.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Air fuel ratio (A/F) sensor 1 Harness or connectors
P0132
(bank 1) circuit high voltage The A/F signal computed by ECM from the A/F (The A/F sensor 1 circuit is open or
Air fuel ratio (A/F) sensor 1 sensor 1 signal is constantly approx. 5 V. shorted.)
P0152 A/F sensor 1
(bank 2) circuit high voltage

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always preform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.

>> GO TO 2.
2.CHECK A/F SENSOR 1 FUNCTION
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select A/F SEN1 (B1) or A/F SEN1 (B2) in DATA MONITOR mode with CONSULT-III.
3. Check A/F SEN1 (B1) or A/F SEN1 (B2) indication.

Revision: 2008 October EC-194 2009 Murano

 P0132, P0152 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
With GST
Follow the procedure With CONSULT-III above. A
Is the indication constantly approx. 5 V?
YES >> Go to EC-195, "Diagnosis Procedure".
NO >> GO TO 3. EC
3.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III C
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF, wait at least 10 seconds and then restart engine.
4. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine. D
CAUTION:
Always drive vehicle at a safe speed.
5. Maintain the following conditions for approximately 20 consecutive seconds. E

ENG SPEED 1,000 - 3,200 rpm

VHCL SPEED SE More than 40 km/h (25 mph) F
B/FUEL SCHDL 1.5 - 9.0 msec
Selector lever Suitable position
G
NOTE:
Keep the accelerator pedal as steady as possible during cruising.
If this procedure is not completed within 1 minute after restarting engine at step 1, return to step
H
1.
6. Check 1st trip DTC.
With GST
Follow the procedure With CONSULT-III above. I
Is 1st trip DTC detected?
YES >> Go to EC-195, "Diagnosis Procedure".
NO >> INSPECTION END J

Diagnosis Procedure INFOID:0000000003387996

K
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection". L
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. M
2.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect A/F sensor 1 harness connector.
2. Turn ignition switch ON. N
3. Check the voltage between A/F sensor 1 harness connector and ground.

A/F sensor 1 O
DTC Ground Voltage
Bank Connector Terminal
P0132 1 F27 4
Ground Battery voltage P
P0152 2 F64 4
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.

Revision: 2008 October EC-195 2009 Murano

 P0132, P0152 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
IPDM E/R harness connector F12
15 A fuse (No. 46)
Harness for open or short between A/F sensor 1 and IPDM E/R

>> Repair or replace harness or connectors.

4.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

A/F sensor 1 ECM

DTC Continuity
Bank Connector Terminal Connector Terminal
1 45
P0132 1 F27
2 49
F8 Existed
1 53
P0152 2 F64
2 57
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.

A/F sensor 1
DTC Ground Continuity
Bank Connector Terminal
1
P0132 1 F27
2
Ground Not existed
1
P0152 2 F64
2

ECM
DTC Ground Continuity
Connector Terminal
45
P0132
49
F8 Ground Not existed
53
P0152
57
5. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Perform GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace malfunctioning part.
6.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
Discard any A/F 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 A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

Revision: 2008 October EC-196 2009 Murano

 P0132, P0152 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]

>> INSPECTION END A

EC

Revision: 2008 October EC-197 2009 Murano

 P0133, P0153 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
P0133, P0153 A/F SENSOR 1
Description INFOID:0000000003591592

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
JMBIA0112GB

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 800C (1,472F).

PBIB3354E

DTC Logic INFOID:0000000003387998

DTC DETECTION LOGIC

To judge the malfunction of A/F sensor 1, this diagnosis measures response time of the A/F signal computed
by ECM from the A/F sensor 1 signal. The time is compensated by engine operating (speed and load), fuel
feedback control constant, and the A/F sensor 1 temperature index. Judgment is based on whether the com-
pensated time (the A/F signal cycling time index) is inordinately long or not.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Air fuel ratio (A/F) sensor 1 Harness or connectors
P0133 (bank 1) circuit slow re- (The A/F sensor 1 circuit is open or
sponse shorted.)
A/F sensor 1
The response of the A/F signal computed by A/F sensor 1 heater
ECM from A/F sensor 1 signal takes more than Fuel pressure
Air fuel ratio (A/F) sensor 1 the specified time. Fuel injector
P0153 (bank 2) circuit slow re- Intake air leakage
sponse Exhaust gas leakage
PCV
Mass air flow sensor

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
Will CONSULT-III be used?

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 P0133, P0153 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 2.
NO >> GO TO 5. A
2.PERFORM DTC CONFIRMATION PROCEDURE-I
With CONSULT-III EC
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. Turn ignition switch OFF and wait at least 10 seconds. C
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1minute under no load.
6. Let engine idle for 1 minute.
7. Select A/F SEN1(B1) P1278/P1279 (for DTC P0133) or A/F SEN1(B2) P1288/P1289 (for DTC P0153) D
of A/F SEN1 in DTC WORK SUPPORT mode with CONSULT-III.
8. Touch START.
Is COMPLETED displayed?
E
YES >> GO TO 3.
NO >> GO TO 4.
3.PERFORM DTC CONFIRMATION PROCEDURE-II F
Check that OK is displayed after touching SELF-DIAG RESULT.
Is OK displayed?
YES >> INSPECTION END G
NO >> Go to EC-200, "Diagnosis Procedure".
4.PERFORM DTC CONFIRMATION PROCEDURE-III H
1. After perform the following procedure, TESTING will be displayed on the CONSULT-III screen.
- Increase the engine speed up to between 4,000 and 5,000 rpm and maintain that speed for 10 seconds.
- Fully release accelerator pedal and then let engine idle for approximately 10 seconds.
If TESTING is not displayed after 10 seconds, go to EC-127, "Component Function Check". I
2. Wait for approximately 20 seconds idle under the condition that TESTING is displayed on the CON-
SULT-III screen.
3. Check that TESTING changes to COMPLETED. J
If TESTING changed to OUT OF CONDITION, go to EC-127, "Component Function Check".
4. Check that OK is displayed after touching SELF-DIAG RESULT.
Is OK displayed? K
YES >> INSPECTION END
NO >> Go to EC-200, "Diagnosis Procedure".
5.CHECK MIXTURE RATIO SELF-LEARNING VALUE L

With GST
1. Start engine and warm it up to normal operating temperature.
2. Select Service $01 with GST. M
3. Calculate the total value of Short term fuel trim and Long term fuel trim indications.
Is the total percentage within 15%?
YES >> GO TO 7. N
NO >> GO TO 6.
6.DETECT MALFUNCTIONING PART O
Check the following.
Intake air leakage
Exhaust gas leakage
Incorrect fuel pressure P
Lack of fuel
Fuel injector
Incorrect PCV hose connection
PCV valve
Mass air flow sensor

Revision: 2008 October EC-199 2009 Murano

 P0133, P0153 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
>> Repair or replace malfunctioning part.
7.PERFORM DTC CONFIRMATION PROCEDURE-IV
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
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 1minute under no load.
5. Let engine idle for 1 minute.
6. Increase the engine speed up to between 4,000 and 5,000 rpm and maintain that speed for 10 seconds.
7. Fully release accelerator pedal and then let engine idle for approximately 1 minute.
8. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-200, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003387999

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.RETIGHTEN A/F SENSOR 1
Loosen and retighten the A/F sensor 1. Refer to EM-34, "Removal and Installation".

>> GO TO 3.
3.CHECK EXHAUST GAS LEAKAGE
1. Start engine and run it at idle.
2. Listen for an exhaust gas leakage before three way catalyst (manifold).

PBIB1216E

Is exhaust gas leakage detected?

YES >> Repair or replace malfunctioning part.
NO >> GO TO 4.
4.CHECK FOR INTAKE AIR LEAKAGE
Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
YES >> Repair or replace malfunctioning part.
NO >> GO TO 5.
5.CLEAR MIXTURE RATIO SELF-LEARNING VALUE
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. Run engine for at least 10 minutes at idle speed.
3. Check 1st trip DTC.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected? Is it difficult to start engine?

Revision: 2008 October EC-200 2009 Murano

 P0133, P0153 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-226, "DTC Logic"
or EC-231, "DTC Logic". A
NO >> GO TO 6.
6.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
EC
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Turn ignition switch ON.
4. Check the voltage between A/F sensor 1 harness connector and ground. C

A/F sensor 1
DTC Ground Voltage D
Bank Connector Terminal
P0133 1 F27 4
Ground Battery voltage
P0153 2 F64 4
E
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7. F
7.DETECT MALFUNCTIONING PART
Check the following.
IPDM E/R harness connector F12 G
15 A fuse (No. 46)
Harness for open or short between A/F sensor 1 and IPDM E/R
H
>> Repair or replace harness or connectors.
8.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector. J

A/F sensor 1 ECM

DTC Continuity
Bank Connector Terminal Connector Terminal K
1 45
P0133 1 F27
2 49
F8 Existed L
1 53
P0153 2 F64
2 57
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector M
ground.

A/F sensor 1 N
DTC Ground Continuity
Bank Connector Terminal
1
P0133 1 F27 O
2
Ground Not existed
1
P0153 2 F64
2
P

Revision: 2008 October EC-201 2009 Murano

 P0133, P0153 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM
DTC Ground Continuity
Connector Terminal
45
P0133
49
F8 Ground Not existed
53
P0153
57
5. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
9.CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER
Refer to EC-147, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 13.
10.CHECK MASS AIR FLOW SENSOR
Refer to EC-159, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 11.
NO >> Replace mass air flow sensor.
11.CHECK PCV VALVE
Refer to EC-462, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair or replace PCV valve.
12.CHECK INTERMITTENT INCIDENT
Perform GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Repair or replace malfunctioning part.
13.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
Discard any A/F 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 A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

>> INSPECTION END

Revision: 2008 October EC-202 2009 Murano

 P0137, P0157 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
P0137, P0157 HO2S2
A
Description INFOID:0000000003388000

The heated oxygen sensor 2, after three way catalyst (manifold), EC

monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air-fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2. C
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions. D
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
SEF327R E
DTC Logic INFOID:0000000003388001

DTC DETECTION LOGIC F

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen storage capacity of the three way catalyst (manifold) causes the G
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 various driving conditions such as fuel-cut.
H

I
SEF259VA

J
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Heated oxygen sensor 2 Harness or connectors K
P0137 (bank 1) circuit low volt- (The sensor circuit is open or shorted)
age The maximum voltage from the sensor does not Heated oxygen sensor 2
Heated oxygen sensor 2 reach the specified voltage. Fuel pressure
P0157 (bank 2) circuit low volt- Fuel injector L
age Intake air leakage

DTC CONFIRMATION PROCEDURE M

1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used? N
YES >> GO TO 2.
NO >> GO TO 5.
O
2.PRECONDITIONING
If DTC confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test. P
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
For better results, perform DTC WORK SUPPORT at a temperature of 0 to 30C (32 to 86F).

>> GO TO 3.

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 P0137, P0157 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]

3.PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III
1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
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 1 minute under no load.
7. Let engine idle for 1 minute.
8. Check that COOLAN TEMP/S indicates more than 70C (158F).
If not, warm up engine and go to next step when COOLAN TEMP/S indication reaches 70C (158F).
9. Open engine hood.
10. Select HO2S2 (B1) P1147 (for DTC P0137) or HO2S2 (B2) P1167 (for DTC P0157) of HO2S2 in
DTC WORK SUPPORT mode with CONSULT-III.
11. Follow the instruction of CONSULT-III display.
NOTE:
It will take at most 10 minutes until COMPLETED is displayed.
12. Touch SELF-DIAG RESULTS.
Which is displayed on CONSULT-III screen?
OK >> INSPECTION END
NG >> Go to EC-205, "Diagnosis Procedure".
CAN NOT BE DIAGNOSED>>GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE AGAIN
1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
2. Perform DTC confirmation procedure again.

>> GO TO 3.
5.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-204, "Component Function Check".
NOTE:
Use component function check to check the overall function of the heated oxygen sensor 2 circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-205, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388002

1.PERFORM COMPONENT FUNCTION CHECK-I

Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
6. Let engine idle for 1 minute.
7. Check the voltage between ECM harness connector terminals under the following conditions.

Revision: 2008 October EC-204 2009 Murano

 P0137, P0157 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
DTC Connec- + Condition Voltage
tor Terminal Terminal
EC
33
P0137 [HO2S2 (bank 1)
signal] 35
Revving up to 4,000 rpm under no The voltage should be above 0.68 V
F8 (Sensor C
34 load at least 10 times at least once during this procedure.
ground)
P0157 [HO2S2 (bank 2)
signal]
Is the inspection result normal? D
YES >> INSPECTION END
NO >> GO TO 2.
E
2.PERFORM COMPONENT FUNCTION CHECK-II
Check the voltage between ECM harness connector terminals under the following conditions.
F
ECM
DTC Connec- + Condition Voltage
tor Terminal Terminal G
33
P0137 [HO2S2 (bank 1)
signal] 35 H
Keeping engine at idle for 10 min- The voltage should be above 0.68 V
F8 (Sensor
34 utes at least once during this procedure.
ground)
P0157 [HO2S2 (bank 2)
signal] I
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 3. J
3.PERFORM COMPONENT FUNCTION CHECK-III
Check the voltage between ECM harness connector terminals under the following conditions. K

ECM
DTC Connec- + Condition Voltage L
tor Terminal Terminal
33
P0137 [HO2S2 (bank 1) M
signal] 35
Coasting from 80 km/h (50 MPH) The voltage should be above 0.68 V
F8 (Sensor
34 with selector lever in the D position at least once during this procedure.
ground)
P0157 [HO2S2 (bank 2) N
signal]
Is the inspection result normal?
YES >> INSPECTION END O
NO >> Go to EC-205, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388003
P
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.

Revision: 2008 October EC-205 2009 Murano

 P0137, P0157 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]

2.CLEAR MIXTURE RATIO SELF-LEARNING VALUE

1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. 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 >> Perform trouble diagnosis for DTC P0171 or P0174. Refer to EC-226, "DTC Logic".
NO >> GO TO 3.
3.CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between heated oxygen sensor 2 (HO2S2) harness connector and ECM harness
connector.

HO2S2 ECM
DTC Continuity
Bank Connector Terminal Connector Terminal
P0137 1 F70 1
F8 35 Existed
P0157 2 F71 1
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between HO2S2 harness connector and ECM harness connector.

HO2S2 ECM
DTC Continuity
Bank Connector Terminal Connector Terminal
P0137 1 F70 4 33
F8 Existed
P0157 2 F71 4 34
2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and
ground.

HO2S2
DTC Ground Continuity
Bank Connector Terminal
P0137 1 F70 4
Ground Not existed
P0157 2 F71 4

ECM
DTC Ground Continuity
Connector Terminal
P0137 33
F8 Ground Not existed
P0157 34
3. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 2
Refer to EC-207, "Component Inspection".
Is the inspection result normal?

Revision: 2008 October EC-206 2009 Murano

 P0137, P0157 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 7.
NO >> GO TO 6. A
6.REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning heated oxygen sensor 2.
EC
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 C
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).
D
>> INSPECTION END
7.CHECK INTERMITTENT INCIDENT
E
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END F

Component Inspection INFOID:0000000003388004

1.INSPECTION START G
Will CONSULT-III be used?
Will CONSULT-III be used?
H
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK HEATED OXYGEN SENSOR 2 I
With CONSULT-III
1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature. J
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 1 minute under no load.
5. Let engine idle for 1 minute.
K
6. Select FUEL INJECTION in ACTIVE TEST mode, and select HO2S2 (B1)/(B2) as the monitor item
with CONSULT-III.
7. Check HO2S2 (B1)/(B2) at idle speed when adjusting FUEL INJECTION to 25%.
L

PBIB3458E

HO2S2 (B1)/(B2) should be above 0.68 V at least once when the FUEL INJECTION is + 25%. O
HO2S2 (B1)/(B2) should be below 0.18 V at least once when the FUEL INJECTION is 25%.
Is the inspection result normal?
YES >> INSPECTION END P
NO >> GO TO 6.
3.CHECK HEATED OXYGEN SENSOR 2-I
Without CONSULT-III
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 1 minute under no load.

Revision: 2008 October EC-207 2009 Murano

 P0137, P0157 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Let engine idle for 1 minute.
5. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage
Connector
Terminal Terminal
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at
signal] 35
Revving up to 4,000 rpm under no load at least once during this procedure.
F8 (Sensor
34 least 10 times The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK HEATED OXYGEN SENSOR 2-II
Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage
Connector
Terminal Terminal
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at
signal] 35
least once during this procedure.
F8 (Sensor Keeping engine at idle for 10 minutes
34 The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 5.
5.CHECK HEATED OXYGEN SENSOR 2-III
Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage
Connector
Terminal Terminal
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at
signal] 35
Coasting from 80 km/h (50 MPH) with se- least once during this procedure.
F8 (Sensor
34 lector lever in the D position The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 6.
6.REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning 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.

Revision: 2008 October EC-208 2009 Murano

 P0137, P0157 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant A
(commercial service tool).

>> INSPECTION END EC

Revision: 2008 October EC-209 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
P0138, P0158 HO2S2
Description INFOID:0000000003591594

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 air fuel ratio (A/F) sensor 1
are shifted, the air-fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
SEF327R

DTC Logic INFOID:0000000003388006

DTC DETECTION LOGIC

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

PBIB1848E

MALFUNCTION B
To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the minimum voltage of sensor is sufficiently low during var-
ious driving conditions such as fuel-cut.

PBIB2376E

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
An excessively high voltage from the sen-
A) (The sensor circuit is open or shorted)
sor is sent to ECM.
Heated oxygen sensor 2
Heated oxygen sensor 2
P0138 (bank 1) circuit high volt- Harness or connectors
age (The sensor circuit is open or shorted)
The minimum voltage from the sensor is
B) Heated oxygen sensor 2
not reached to the specified voltage.
Fuel pressure
Fuel injector

Revision: 2008 October EC-210 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
A
Harness or connectors
An excessively high voltage from the sen-
A) (The sensor circuit is open or shorted)
sor is sent to ECM.
Heated oxygen sensor 2
Heated oxygen sensor 2
Harness or connectors EC
P0158 (bank 2) circuit high volt-
age (The sensor circuit is open or shorted)
The minimum voltage from the sensor is
B) Heated oxygen sensor 2
not reached to the specified voltage.
Fuel pressure
Fuel injector
C

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING D

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. E
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
F
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A G
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
H
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
6. Let engine idle for 2 minutes.
7. Check 1st trip DTC. I
Is 1st trip DTC detected?
YES >> Go to EC-213, "Diagnosis Procedure".
NO-1 >> With CONSULT-III: GO TO 3. J
NO-2 >> Without CONSULT-III: GO TO 5.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
K
NOTE:
For better results, perform DTC WORK SUPPORT at a temperature of 0 to 30C (32 to 86F).
1. Select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature. L
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Turn ignition switch OFF and wait at least 10 seconds. M
6. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
7. Let engine idle for 1 minute.
8. Check that COOLAN TEMP/S indicates more than 70C (158F).
If not, warm up engine and go to next step when COOLAN TEMP/S indication reaches 70C (158F). N
9. Open engine hood.
10. Select HO2S2 (B1) P1146 (for DTC P0138) or HO2S2 (B2) P1166 (for DTC P0158) of HO2S2 in
DTC WORK SUPPORT mode with CONSULT-III. O
11. Follow the instruction of CONSULT-III display.
NOTE:
It will take at most 10 minutes until COMPLETED is displayed.
12. Touch SELF-DIAG RESULTS. P
Which is displayed on CONSULT-III screen?
OK >> INSPECTION END
NG >> Go to EC-213, "Diagnosis Procedure".
CON NOT BE DIAGNOSED>>GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B AGAIN
1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).

Revision: 2008 October EC-211 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Perform DTC confirmation procedure again.

>> GO TO 3.
5.PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B
Perform component function check. Refer to EC-212, "Component Function Check".
NOTE:
Use component function check to check the overall function of the heated oxygen sensor 2 circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-213, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388007

1.PERFORM COMPONENT FUNCTION CHECK-I

Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
6. Let engine idle for 1 minute.
7. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
DTC Connec- + Condition Voltage
tor Terminal Terminal
33
P0138 [HO2S2 (bank 1)
signal] 35
Revving up to 4,000 rpm under no The voltage should be below 0.18 V
F8 (Sensor
34 load at least 10 times at least once during this procedure.
ground)
P0158 [HO2S2 (bank 2)
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.PERFORM COMPONENT FUNCTION CHECK-II
Check the voltage between ECM harness connector terminals under the following conditions.

ECM
DTC Connec- + Condition Voltage
tor Terminal Terminal
33
P0138 [HO2S2 (bank 1)
signal] 35
Keeping engine speed at idle for 10 The voltage should be below 0.18 V
F8 (Sensor
34 minutes at least once during this procedure.
ground)
P0158 [HO2S2 (bank 2)
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 3.
3.PERFORM COMPONENT FUNCTION CHECK-III

Revision: 2008 October EC-212 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
Check the voltage between ECM harness connector terminals under the following conditions.
A
ECM
DTC Connec- + Condition Voltage
tor
EC
Terminal Terminal
33
P0138 [HO2S2 (bank 1)
signal] 35 C
Coasting from 80 km/h (50 MPH) The voltage should be below 0.18 V
F8 (Sensor
34 with selector lever in the D position at least once during this procedure.
ground)
P0158 [HO2S2 (bank 2)
signal] D
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-213, "Diagnosis Procedure". E

Diagnosis Procedure INFOID:0000000003388008

F
1.INSPECTION START
Confirm the detected malfunction (A or B). Refer to EC-210, "DTC Logic".
Which malfunction is detected? G
A >> GO TO 2.
B >> GO TO 9.
2.CHECK GROUND CONNECTION H

1. Turn ignition switch OFF.

2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
I
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace ground connection.
J
3.CHECK HO2S2 CONNECTOR FOR WATER
1. Disconnect heated oxygen sensor 2 harness connector.
2. Check that water is not inside connectors. K
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness or connectors. L
4.CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 2 harness connector. M
2. Disconnect ECM harness connector.
3. Check the continuity between heated oxygen sensor 2 (HO2S2) harness connector and ECM harness
connector.
N
HO2S2 ECM
DTC Continuity
Bank Connector Terminal Connector Terminal
O
P0138 1 F70 1
F8 35 Existed
P0158 2 F71 1
4. Also check harness for short to ground and short to power. P
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between HO2S2 harness connector and ECM harness connector.

Revision: 2008 October EC-213 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]

HO2S2 ECM
DTC Continuity
Bank Connector Terminal Connector Terminal
P0138 1 F70 4 33
F8 Existed
P0158 2 F71 4 34
2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and
ground.

HO2S2
DTC Ground Continuity
Bank Connector Terminal
P0138 1 F70 4
Ground Not existed
P0158 2 F71 4

ECM
DTC Ground Continuity
Connector Terminal
P0138 33
F8 Ground Not existed
P0158 34
3. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK HEATED OXYGEN SENSOR 2
Refer to EC-216, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7.
7.REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning 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 system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

>> INSPECTION END

8.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

9.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair or replace ground connection.
10.CLEAR MIXTURE RATIO SELF-LEARNING VALUE

Revision: 2008 October EC-214 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement". A
2. 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 >> Perform trouble diagnosis for DTC P0172, P0175. Refer to EC-231, "DTC Logic". EC
NO >> GO TO 11.
11.CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
C
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between HO2S2 harness connector and ECM harness connector. D

HO2S2 ECM
DTC Continuity E
Bank Connector Terminal Connector Terminal
P0138 1 F70 1
F8 35 Existed
P0158 2 F71 1
F
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 12. G
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
12.CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
H
1. Check the continuity between HO2S2 harness connector and ECM harness connector.

HO2S2 ECM I
DTC Continuity
Bank Connector Terminal Connector Terminal
P0138 1 F70 4 33
F8 Existed J
P0158 2 F71 4 34
2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and
ground.
K

HO2S2
DTC Ground Continuity
Bank Connector Terminal L
P0138 1 F70 4
Ground Not existed
P0158 2 F71 4
M
ECM
DTC Ground Continuity
Connector Terminal
N
P0138 33
F8 Ground Not existed
P0158 34
3. Also check harness for short to power. O
Is the inspection result normal?
YES >> GO TO 13.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. P
13.CHECK HEATED OXYGEN SENSOR 2
Refer to EC-216, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 15.
NO >> GO TO 14.

Revision: 2008 October EC-215 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]

14.REPLACE HEATED OXYGEN SENSOR 2

Replace malfunctioning 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 system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

>> INSPECTION END

15.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003624898

1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK HEATED OXYGEN SENSOR 2
With CONSULT-III
1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
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 1 minute under no load.
5. Let engine idle for 1 minute.
6. Select FUEL INJECTION in ACTIVE TEST mode, and select HO2S2 (B1)/(B2) as the monitor item
with CONSULT-III.
7. Check HO2S2 (B1)/(B2) at idle speed when adjusting FUEL INJECTION to 25%.

PBIB3458E

HO2S2 (B1)/(B2) should be above 0.68 V at least once when the FUEL INJECTION is + 25%.
HO2S2 (B1)/(B2) should be below 0.18 V at least once when the FUEL INJECTION is 25%.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 6.
3.CHECK HEATED OXYGEN SENSOR 2-I
Without CONSULT-III
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 1 minute under no load.
4. Let engine idle for 1 minute.
5. Check the voltage between ECM harness connector terminals under the following conditions.

Revision: 2008 October EC-216 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
+ Condition Voltage
Connector
Terminal Terminal
EC
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at
signal] 35
Revving up to 4,000 rpm under no load at least once during this procedure.
F8 (Sensor C
34 least 10 times The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
signal]
Is the inspection result normal? D
YES >> INSPECTION END
NO >> GO TO 4.
E
4.CHECK HEATED OXYGEN SENSOR 2-II
Check the voltage between ECM harness connector terminals under the following conditions.
F
ECM
+ Condition Voltage
Connector G
Terminal Terminal
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at
signal] 35 H
least once during this procedure.
F8 (Sensor Keeping engine at idle for 10 minutes
34 The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
signal] I
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 5. J
5.CHECK HEATED OXYGEN SENSOR 2-III
Check the voltage between ECM harness connector terminals under the following conditions. K

ECM
+ Condition Voltage L
Connector
Terminal Terminal
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at M
signal] 35
Coasting from 80 km/h (50 MPH) with se- least once during this procedure.
F8 (Sensor
34 lector lever in the D position The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
N
signal]
Is the inspection result normal?
YES >> INSPECTION END O
NO >> GO TO 6.
6.REPLACE HEATED OXYGEN SENSOR 2
P
Replace malfunctioning 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 system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

Revision: 2008 October EC-217 2009 Murano

 P0138, P0158 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
>> INSPECTION END

Revision: 2008 October EC-218 2009 Murano

 P0139, P0159 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
P0139, P0159 HO2S2
A
Description INFOID:0000000003591596

The heated oxygen sensor 2, after three way catalyst (manifold), EC

monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air-fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2. C
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions. D
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
SEF327R E
DTC Logic INFOID:0000000003388011

DTC DETECTION LOGIC F

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen storage capacity of the three way catalyst (manifold) causes the G
longer switching time. To judge the malfunctions of heated oxygen
sensor 2, ECM monitors whether the switching response of the sen-
sor's voltage is faster than specified during various driving conditions
H
such as fuel-cut.

I
SEF302U

J
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Heated oxygen sensor 2 Harness or connectors K
P0139 (bank 1) circuit slow re- (The sensor circuit is open or shorted)
sponse It takes more time for the sensor to respond be- Heated oxygen sensor 2
Heated oxygen sensor 2 tween rich and lean than the specified time. Fuel pressure
P0159 (bank 2) circuit slow re- Fuel injector L
sponse Intake air leakage

DTC CONFIRMATION PROCEDURE M

1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used? N
YES >> GO TO 2.
NO >> GO TO 5.
O
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test. P
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
For better results, perform DTC WORK SUPPORT at a temperature of 0 to 30C (32 to 86F).

>> GO TO 3.

Revision: 2008 October EC-219 2009 Murano

 P0139, P0159 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]

3.PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III
1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
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 1 minute under no load.
7. Let engine idle for 1 minute.
8. Open engine hood.
9. Select HO2S2 (B1) P0139 or HO2S2 (B2) P0159 of HO2S2 in DTC WORK SUPPORT mode with
CONSULT-III.
10. Follow the instruction of CONSULT-III display.
NOTE:
It will take at most 10 minutes until COMPLETED is displayed.
11. Touch SELF-DIAG RESULTS.
Which is displayed on CONSULT-III screen?
OK >> INSPECTION END
NG >> Go to EC-221, "Diagnosis Procedure".
CAN NOT BE DIAGNOSED>>GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE AGAIN
1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
2. Perform DTC confirmation procedure again.

>> GO TO 3.
5.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-220, "Component Function Check".
NOTE:
Use component function check to check the overall function of the heated oxygen sensor 2 circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-221, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388012

1.PERFORM COMPONENT FUNCTION CHECK-I

Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
6. Let engine idle for 1 minute.
7. Check the voltage between ECM harness connector terminals under the following conditions.

Revision: 2008 October EC-220 2009 Murano

 P0139, P0159 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
DTC Connec- + Condition Voltage
tor Terminal Terminal
EC
33
P0139 [HO2S2 (bank 1)
signal] 35 A change of voltage should be more
Revving up to 4,000 rpm under no
F8 (Sensor than 0.24 V for 1 second during this C
34 load at least 10 times
ground) procedure.
P0159 [HO2S2 (bank 2)
signal]
Is the inspection result normal? D
YES >> INSPECTION END
NO >> GO TO 2.
E
2.PERFORM COMPONENT FUNCTION CHECK-II
Check the voltage between ECM harness connector terminals under the following conditions.
. F

ECM
DTC Connec- + Condition Voltage G
tor Terminal Terminal
33
P0139 [HO2S2 (bank 1) H
signal] 35 A change of voltage should be more
F8 (Sensor Keeping engine at idle for 10 minutes than 0.24 V for 1 second during this
34 ground) procedure.
P0159 [HO2S2 (bank 2) I
signal]
Is the inspection result normal?
YES >> INSPECTION END J
NO >> GO TO 3.
3.PERFORM COMPONENT FUNCTION CHECK-III
K
Check the voltage between ECM harness connector terminals under the following conditions.

ECM L
DTC Connec- + Condition Voltage
tor Terminal Terminal
33 M
P0139 [HO2S2 (bank 1)
signal] 35 A change of voltage should be more
Coasting from 80 km/h (50 MPH) in
F8 (Sensor than 0.24 V for 1 second during this
34 D position N
ground) procedure.
P0159 [HO2S2 (bank 2)
signal]
Is the inspection result normal? O
YES >> INSPECTION END
NO >> Go to EC-221, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388013 P

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.

Revision: 2008 October EC-221 2009 Murano

 P0139, P0159 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Repair or replace ground connection.
2.CLEAR MIXTURE RATIO SELF-LEARNING VALUE
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. 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 >> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-226, "DTC Logic"
or EC-231, "DTC Logic".
NO >> GO TO 3.
3.CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between heated oxygen sensor 2 (HO2S2) harness connector and ECM harness
connector.

HO2S2 ECM
DTC Continuity
Bank Connector Terminal Connector Terminal
P0139 1 F70 1
F8 35 Existed
P0159 2 F71 1
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between HO2S2 harness connector and ECM harness connector.

HO2S2 ECM
DTC Continuity
Bank Connector Terminal Connector Terminal
P0139 1 F70 4 33
F8 Existed
P0159 2 F71 4 34
2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and
ground.

HO2S2
DTC Ground Continuity
Bank Connector Terminal
P0139 1 F70 4
Ground Not existed
P0159 2 F71 4

ECM
DTC Ground Continuity
Connector Terminal
P0139 33
F8 Ground Not existed
P0159 34
3. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 2
Revision: 2008 October EC-222 2009 Murano
 P0139, P0159 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
Refer to EC-223, "Component Inspection".
Is the inspection result normal? A
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE HEATED OXYGEN SENSOR 2 EC

Replace malfunctioning heated oxygen sensor 2.

CAUTION:
C
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 [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant D
(commercial service tool).

>> INSPECTION END E

7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident". F

>> INSPECTION END

Component Inspection INFOID:0000000003625196
G

1.INSPECTION START
H
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2. I
NO >> GO TO 3.
2.CHECK HEATED OXYGEN SENSOR 2
J
With CONSULT-III
1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds. K
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Select FUEL INJECTION in ACTIVE TEST mode, and select HO2S2 (B1)/(B2) as the monitor item L
with CONSULT-III.
7. Check HO2S2 (B1)/(B2) at idle speed when adjusting FUEL INJECTION to 25%.

O
PBIB3458E

HO2S2 (B1)/(B2) should be above 0.68 V at least once when the FUEL INJECTION is + 25%.
HO2S2 (B1)/(B2) should be below 0.18 V at least once when the FUEL INJECTION is 25%. P
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 6.
3.CHECK HEATED OXYGEN SENSOR 2-I
Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.

Revision: 2008 October EC-223 2009 Murano

 P0139, P0159 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
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 1 minute under no load.
4. Let engine idle for 1 minute.
5. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage
Connector
Terminal Terminal
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at
signal] 35
Revving up to 4,000 rpm under no load at least once during this procedure.
F8 (Sensor
34 least 10 times The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK HEATED OXYGEN SENSOR 2-II
Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage
Connector
Terminal Terminal
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at
signal] 35
least once during this procedure.
F8 (Sensor Keeping engine at idle for 10 minutes
34 The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 5.
5.CHECK HEATED OXYGEN SENSOR 2-III
Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage
Connector
Terminal Terminal
33
[HO2S2 (bank 1) The voltage should be above 0.68 V at
signal] 35
Coasting from 80 km/h (50 MPH) with se- least once during this procedure.
F8 (Sensor
34 lector lever in the D position The voltage should be below 0.18 V at
ground)
[HO2S2 (bank 2) least once during this procedure.
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 6.
6.REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning 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.

Revision: 2008 October EC-224 2009 Murano

 P0139, P0159 HO2S2
< COMPONENT DIAGNOSIS > [VQ35DE]
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant A
(commercial service tool).

>> INSPECTION END EC

Revision: 2008 October EC-225 2009 Murano

 P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
DTC Logic INFOID:0000000003388015

DTC DETECTION 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 A/F sensor 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 illuminates the MIL (2 trip detection
logic).

Sensor Input signal to ECM ECM function Actuator

Density of oxygen in exhaust gas
A/F sensor 1 Fuel injection control Fuel injector
(Mixture ratio feedback signal)

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Fuel injection system too Intake air leakage
P0171
lean (bank 1) A/F sensor 1
Fuel injector
Fuel injection system does not operate properly.
Exhaust gas leakage
The amount of mixture ratio compensation is too
Fuel injection system too Incorrect fuel pressure
P0174 large. (The mixture ratio is too lean.)
lean (bank 2) Lack of fuel
Mass air flow sensor
Incorrect PCV hose connection

DTC CONFIRMATION PROCEDURE

NOTE:
Check vehicle specifications and VIN, then select the procedure to be performed. (Refer to the table below.)

Vehicle specification Vehicle serial number TYPE

Up to JN8AZ18U*9W100000 A
From JN8AZ18U*9W100001 B
2WD
Up to JN8AZ18U*9W710000 A
From JN8AZ18U*9W710001 B
Up to JN8AZ18W*9W200000 A
From JN8AZ18W*9W200001 B
4WD
Up to JN8AZ18W*9W810000 A
From JN8AZ18W*9W810001 B

TYPE A
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. Start engine.
Is it difficult to start engine?

Revision: 2008 October EC-226 2009 Murano

 P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 3.
NO >> GO TO 4. A
3.RESTART ENGINE
If it is difficult to start engine, the fuel injection system has a malfunction, too.
EC
Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the
engine. Do not depress accelerator pedal too much. C
Does engine start?
YES >> Go to EC-228, "Diagnosis Procedure".
NO >> Check exhaust and intake air leakage visually. D
4.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Keep engine idle for at least 10 minutes. E
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-228, "Diagnosis Procedure". F
NO >> GO TO 5.
5.PERFORM DTC CONFIRMATION PROCEDURE-III
1. Turn ignition switch OFF and wait at least 10 seconds. G
2. Start engine and drive the vehicle under similar conditions to (1st trip) Freeze Frame Data for 10 minutes.
Refer to the table below.
Hold the accelerator pedal as steady as possible. H
Similar conditions to (1st trip) Freeze Frame Data mean that the following conditions should be satisfied at
the same time.

Engine speed Engine speed in the freeze frame data 400 rpm
I
Vehicle speed Vehicle speed in the freeze frame data 10 km/h (6 MPH)
Basic fuel schedule Basic fuel schedule in freeze frame data (1 0.1) J
When the freeze frame data shows lower than 70C (158F),
T should be lower than 70C (158F).
Engine coolant temperature (T) condition
When the freeze frame data shows higher than or equal to 70C (158F), K
T should be higher than or equal to 70C (158F).
3. Check 1st trip DTC.
Is 1st trip DTC detected? L
YES >> Go to EC-228, "Diagnosis Procedure".
NO >> INSPECTION END
TYPE B M

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- N
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. O

>> GO TO 2.
P
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. Start engine.
Is it difficult to start engine?
YES >> GO TO 3.

Revision: 2008 October EC-227 2009 Murano

 P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> GO TO 4.
3.RESTART ENGINE
If it is difficult to start engine, the fuel injection system has a malfunction, too.
Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the
engine. Do not depress accelerator pedal too much.
Does engine start?
YES >> Go to EC-228, "Diagnosis Procedure".
NO >> Check exhaust and intake air leakage visually.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Keep engine idle for at least 5 minutes.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-228, "Diagnosis Procedure".
NO >> GO TO 5.
5.PERFORM DTC CONFIRMATION PROCEDURE-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine.
3. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.

VHCL SPEED SE 50 - 120 km/h (31 - 75 mph)

CAUTION:
Always drive vehicle at a safe speed.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-228, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388016

1.CHECK EXHAUST GAS LEAKAGE

1. Start engine and run it at idle.
2. Listen for an exhaust gas leakage before three way catalyst (manifold).

PBIB1216E

Is exhaust gas leakage detected?

YES >> Repair or replace malfunctioning part.
NO >> GO TO 2.
2.CHECK FOR INTAKE AIR LEAKAGE
1. Listen for an intake air leakage after the mass air flow sensor.
2. Check PCV hose connection.
Is intake air leakage detected?
YES >> Repair or replace malfunctioning part.
NO >> GO TO 3.

Revision: 2008 October EC-228 2009 Murano

 P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]

3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT A

1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
EC
4. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

A/F sensor 1 ECM

DTC Continuity C
Bank Connector Terminal Connector Terminal
1 45
P0171 1 F27
2 49 D
F8 Existed
1 53
P0174 2 F64
2 57
E
5. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
F
A/F sensor 1
DTC Ground Continuity
Bank Connector Terminal
1 G
P0171 1 F27
2
Ground Not existed
1
P0174 2 F64 H
2

ECM I
DTC Ground Continuity
Connector Terminal
45
P0171 J
49
F8 Ground Not existed
53
P0174
57 K
6. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 4. L
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK FUEL PRESSURE
M
1. Release fuel pressure to zero. Refer to EC-545, "Inspection".
2. Install fuel pressure gauge kit [SST (J-44321)] and check fuel pressure. Refer to EC-545, "Inspection".
N
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
Is the inspection result normal?
YES >> GO TO 6. O
NO >> GO TO 5.
5. DETECT MALFUNCTIONING PART
P
Check fuel hoses and fuel tubes for clogging.
Is the inspection result normal?
YES >> Replace fuel filter and fuel pump assembly.
NO >> Repair or replace malfunctioning part.
6.CHECK MASS AIR FLOW SENSOR
With CONSULT-III

Revision: 2008 October EC-229 2009 Murano

 P0171, P0174 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Install all removed parts.
2. Check MASS AIR FLOW in DATA MONITOR mode with CONSULT-III.
For specification, refer to EC-551, "Mass Air Flow Sensor".
With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in Service $01 with GST.
For specification, refer to EC-551, "Mass Air Flow Sensor".
Is the measurement value within the specification?
YES >> GO TO 7.
NO >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
ground. Refer to EC-163, "Diagnosis Procedure".
7.CHECK FUNCTION OF FUEL INJECTOR
With CONSULT-III
1. Start engine.
2. Perform POWER BALANCE in ACTIVE TEST mode with CONSULT-III.
3. Check that each circuit produces a momentary engine speed drop.
With GST
1. Let engine idle.
2. Listen to each fuel injector operating sound.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Perform trouble diagnosis for FUEL INJECTOR, refer to
EC-444, "Diagnosis Procedure".

PBIB3332E

8.CHECK FUEL INJECTOR

1. Turn ignition switch OFF.
2. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
3. Disconnect all fuel injector harness connectors.
4. Remove fuel tube assembly. Refer to EM-45, "Removal and Installation".
Keep fuel hose and all fuel injectors connected to fuel tube.
5. For DTC P0171, reconnect fuel injector harness connectors on bank 1.
For DTC P0174, reconnect fuel injector harness connectors on bank 2.
6. Disconnect all ignition coil harness connectors.
7. Prepare pans or saucers under each fuel injector.
8. Crank engine for about 3 seconds.
For DTC P0171, check that fuel sprays out from fuel injectors on bank 1.
For DTC P0174, check that fuel sprays out from fuel injectors on bank 2.

Fuel should be sprayed evenly for each fuel injector.

Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace fuel injectors from which fuel does not spray out. Always replace O-ring with new ones.
9.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Revision: 2008 October EC-230 2009 Murano

 P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
A
DTC Logic INFOID:0000000003388017

DTC DETECTION LOGIC EC

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 A/F sensor 1. The ECM calculates
the necessary compensation to correct the offset between the actual and the theoretical ratios. C
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 illuminates the MIL (2 trip detection logic).

Sensor Input signal to ECM ECM function Actuator D

Density of oxygen in exhaust gas
A/F sensor 1 Fuel injection control Fuel injector
(Mixture ratio feedback signal)
E

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Fuel injection system too A/F sensor 1 F
P0172
rich (bank 1) Fuel injection system does not operate properly. Fuel injector
The amount of mixture ratio compensation is too Exhaust gas leakage
Fuel injection system too large. (The mixture ratio is too rich.) Incorrect fuel pressure
P0175
rich (bank 2) Mass air flow sensor G
DTC CONFIRMATION PROCEDURE
NOTE:
Check vehicle specifications and VIN, then select the procedure to be performed. (Refer to the table below.) H

Vehicle specification Vehicle serial number TYPE

I
Up to JN8AZ18U*9W100000 A
From JN8AZ18U*9W100001 B
2WD
Up to JN8AZ18U*9W710000 A J
From JN8AZ18U*9W710001 B
Up to JN8AZ18W*9W200000 A
K
From JN8AZ18W*9W200001 B
4WD
Up to JN8AZ18W*9W810000 A
From JN8AZ18W*9W810001 B L
TYPE A
1.PRECONDITIONING M
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. N
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

O
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE P
CLEAR : Special Repair Requirement".
2. Start engine.
Is it difficult to start engine?
YES >> GO TO 3.
NO >> GO TO 4.
3.RESTART ENGINE
Revision: 2008 October EC-231 2009 Murano
 P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
If it is difficult to start engine, the fuel injection system has a malfunction, too.
Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the
engine. Do not depress accelerator pedal too much.
Does engine start?
YES >> Go to EC-233, "Diagnosis Procedure".
NO >> Check exhaust and intake air leakage visually.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Keep engine idle for at least 10 minutes.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-233, "Diagnosis Procedure".
NO >> GO TO 5.
5.PERFORM DTC CONFIRMATION PROCEDURE-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and drive the vehicle under similar conditions to (1st trip) Freeze Frame Data for 10 minutes.
Refer to the table below.
Hold the accelerator pedal as steady as possible.
Similar conditions to (1st trip) Freeze Frame Data mean that the following conditions should be satisfied at
the same time.

Engine speed Engine speed in the freeze frame data 400 rpm
Vehicle speed Vehicle speed in the freeze frame data 10 km/h (6 MPH)
Basic fuel schedule Basic fuel schedule in freeze frame data (1 0.1)
When the freeze frame data shows lower than 70C (158F),
T should be lower than 70C (158F).
Engine coolant temperature (T) condition
When the freeze frame data shows higher than or equal to 70C (158F),
T should be higher than or equal to 70C (158F).
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-233, "Diagnosis Procedure".
NO >> INSPECTION END
TYPE B
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. Start engine.
Is it difficult to start engine?
YES >> GO TO 3.
NO >> GO TO 4.
3.RESTART ENGINE
If it is difficult to start engine, the fuel injection system has a malfunction, too.

Revision: 2008 October EC-232 2009 Murano

 P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
Crank engine while depressing accelerator pedal.
NOTE: A
When depressing accelerator pedal three-fourths (3/4) or more, the control system does not start the
engine. Do not depress accelerator pedal too much.
Does engine start? EC
YES >> Go to EC-233, "Diagnosis Procedure".
NO >> Check exhaust and intake air leakage visually.
4.PERFORM DTC CONFIRMATION PROCEDURE-II C
1. Keep engine idle for at least 5 minutes.
2. Check 1st trip DTC.
Is 1st trip DTC detected? D
YES >> Go to EC-233, "Diagnosis Procedure".
NO >> GO TO 5.
E
5.PERFORM DTC CONFIRMATION PROCEDURE-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine. F
3. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.

VHCL SPEED SE 50 - 120 km/h (31 - 75 mph) G

CAUTION:
Always drive vehicle at a safe speed.
4. Check 1st trip DTC. H
Is 1st trip DTC detected?
YES >> Go to EC-233, "Diagnosis Procedure".
NO >> INSPECTION END I

Diagnosis Procedure INFOID:0000000003388018

J
1.CHECK EXHAUST GAS LEAKAGE
1. Start engine and run it at idle.
2. Listen for an exhaust gas leakage before three way catalyst (manifold). K

PBIB1216E
N
Is exhaust gas leakage detected?
YES >> Repair or replace malfunctioning part.
NO >> GO TO 2. O
2.CHECK FOR INTAKE AIR LEAKAGE
Listen for an intake air leakage after the mass air flow sensor.
P
Is intake air leakage detected?
YES >> Repair or replace malfunctioning part.
NO >> GO TO 3.
3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.

Revision: 2008 October EC-233 2009 Murano

 P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

A/F sensor 1 ECM

DTC Continuity
Bank Connector Terminal Connector Terminal
1 45
P0172 1 F27
2 49
F8 Existed
1 53
P0175 2 F64
2 57
5. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.

A/F sensor 1
DTC Ground Continuity
Bank Connector Terminal
1
P0172 1 F27
2
Ground Not existed
1
P0175 2 F64
2

ECM
DTC Ground Continuity
Connector Terminal
45
P0172
49
F8 Ground Not existed
53
P0175
57
6. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK FUEL PRESSURE
1. Release fuel pressure to zero. Refer to EC-545, "Inspection".
2. Install fuel pressure gauge kit [SST (J-44321)] and check fuel pressure. Refer to EC-545, "Inspection".

At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)

Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace fuel filter and fuel pump assembly.
5.CHECK MASS AIR FLOW SENSOR
With CONSULT-III
1. Install all removed parts.
2. Check MASS AIR FLOW in DATA MONITOR mode with CONSULT-III.
For specification, refer to EC-551, "Mass Air Flow Sensor".
With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in Service $01 with GST.
For specification, refer to EC-551, "Mass Air Flow Sensor".
Is the measurement value within the specification?
YES >> GO TO 6.
NO >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
ground. Refer to EC-163, "Diagnosis Procedure".

Revision: 2008 October EC-234 2009 Murano

 P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]

6.CHECK FUNCTION OF FUEL INJECTOR A

With CONSULT-III
1. Start engine.
2. Perform POWER BALANCE in ACTIVE TEST mode with CONSULT-III. EC
3. Check that each circuit produces a momentary engine speed drop.
With GST
1. Let engine idle.
2. Listen to each fuel injector operating sound. C
Is the inspection result normal?
YES >> GO TO 7.
NO >> Perform trouble diagnosis for FUEL INJECTOR, refer to D
EC-444, "Diagnosis Procedure".

PBIB3332E
F
7.CHECK FUEL INJECTOR
1. Remove fuel injector assembly. Refer to EM-45, "Removal and Installation". G
Keep fuel hose and all fuel injectors connected to fuel tube.
2. Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
3. Disconnect all fuel injector harness connectors.
H
4. Disconnect all ignition coil harness connectors.
5. Prepare pans or saucers under each fuel injectors.
6. Crank engine for about 3 seconds.
Check fuel does not drip from fuel injector. I
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace the fuel injectors from which fuel is dripping. Always replace O-ring with new one. J
8.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident". K

>> INSPECTION END

L

Revision: 2008 October EC-235 2009 Murano

 P0181 FTT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0181 FTT SENSOR
Description INFOID:0000000003388019

The fuel tank temperature sensor is used to detect the fuel tempera-
ture inside the fuel tank. The sensor modifies a voltage signal from
the ECM. The modified signal returns to the ECM as the fuel temper-
ature input. The sensor uses a thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.
<Reference data>

Fluid temperature Voltage* Resistance

[C (F)] (V) (k)
SEF012P
20 (68) 3.5 2.3 - 2.7
50 (122) 2.2 0.79 - 0.90
*: These data are reference values and are measured between ECM terminals 95 (Fuel tank temperature sensor) and ground.

DTC Logic INFOID:0000000003388020

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Rationally incorrect voltage from the sensor is
Fuel tank temperature Harness or connectors
sent to ECM, compared with the voltage signals
P0181 sensor circuit range/per- (The sensor circuit is open or shorted)
from engine coolant temperature sensor and in-
formance Fuel tank temperature sensor
take air temperature sensor.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Turn ignition switch ON and wait at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-237, "Diagnosis Procedure".
NO >> GO TO 3.
3.CHECK ENGINE COOLANT TEMPERATURE
With CONSULT-III
1. Select COOLAN TEMP/S in DATA MONITOR with CONSULT-III.
2. Check COOLAN TEMP/S value.
With GST
Follow the procedure With CONSULT-III above.
Is COOLAN TEMP/S less than 60C (140F)?
YES >> INSPECTION END
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
Revision: 2008 October EC-236 2009 Murano
 P0181 FTT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
With CONSULT-III
1. Cool engine down until COOLAN TEMP/S is less than 60C (140F). A
2. Wait at least 10 seconds.
3. Check 1st trip DTC.
With GST EC
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> Go to EC-237, "Diagnosis Procedure". C
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388021

D
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection". E
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. F

2.CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF. G
2. Disconnect fuel level sensor unit and fuel pump harness connector.
3. Turn ignition switch ON.
4. Check the voltage between fuel level sensor unit and fuel pump harness connector and ground.
H

Fuel level sensor unit and fuel pump

Ground Voltage
Connector Terminal I
B40 4 Ground Approx. 5 V
Is the inspection result normal?
YES >> GO TO 4. J
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART K
Check the following.
Harness connectors E104, B4
Harness for open or short between ECM and fuel level sensor unit and fuel pump
L

>> Repair open circuit, short to ground or short to power in harness or connector.
4.CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT M
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between fuel level sensor unit and fuel pump harness connector and ECM harness N
connector.

Fuel level sensor unit and fuel pump ECM O

Continuity
Connector Terminal Connector Terminal
B40 5 E16 104 Existed
P
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.

Revision: 2008 October EC-237 2009 Murano

 P0181 FTT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Harness connectors E105, M11
Harness connectors M77, B11
Harness for open or short between fuel level sensor unit and fuel pump and ECM

>> Repair open circuit, short to ground or short to power in harness or connector.
6.CHECK FUEL TANK TEMPERATURE SENSOR
Refer to EC-238, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace fuel level sensor unit and fuel pump.
7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003388022

1.CHECK FUEL TANK TEMPERATURE SENSOR

1. Turn ignition switch OFF.
2. Remove fuel level sensor unit.
3. Check resistance between fuel level sensor unit and fuel pump
terminals by heating with hot water as shown in the figure.

Terminals Condition Resistance

20 (68) 2.3 - 2.7 k
4 and 5 Temperature [C (F)]
50 (122) 0.79 - 0.90 k
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace fuel level sensor unit and fuel pump.
JMBIA0167ZZ

Revision: 2008 October EC-238 2009 Murano

 P0182, P0183 FTT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0182, P0183 FTT SENSOR
A
Description INFOID:0000000003591617

The fuel tank temperature sensor is used to detect the fuel tempera- EC
ture inside the fuel tank. The sensor modifies a voltage signal from
the ECM. The modified signal returns to the ECM as the fuel temper-
ature input. The sensor uses a thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor C
decreases as temperature increases.
<Reference data>
D
Fluid temperature Voltage* Resistance
[C (F)] (V) (k)
20 (68) 3.5 2.3 - 2.7 SEF012P E
50 (122) 2.2 0.79 - 0.90
*: These data are reference values and are measured between ECM terminals 95 (Fuel tank temperature sensor) and ground.
F
DTC Logic INFOID:0000000003388024

DTC DETECTION LOGIC G

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Fuel tank temperature An excessively low voltage from the sensor is H
P0182 Harness or connectors
sensor circuit low input sent to ECM.
(The sensor circuit is open or shorted.)
Fuel tank temperature An excessively high voltage from the sensor is Fuel tank temperature sensor
P0183
sensor circuit high input sent to ECM. I

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING J
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. K
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
L
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
M
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
N
YES >> Go to EC-239, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003591618 O

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF. P
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.

Revision: 2008 October EC-239 2009 Murano

 P0182, P0183 FTT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Disconnect fuel level sensor unit and fuel pump harness connector.
3. Turn ignition switch ON.
4. Check the voltage between fuel level sensor unit and fuel pump harness connector and ground.

Fuel level sensor unit and fuel pump

Ground Voltage
Connector Terminal
B40 4 Ground Approx. 5 V
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E104, B4
Harness for open or short between ECM and fuel level sensor unit and fuel pump

>> Repair open circuit, short to ground or short to power in harness or connector.
4.CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between fuel level sensor unit and fuel pump harness connector and ECM harness
connector.

Fuel level sensor unit and fuel pump ECM

Continuity
Connector Terminal Connector Terminal
B40 5 E16 104 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E105, M11
Harness connectors M77, B11
Harness for open or short between fuel level sensor unit and fuel pump and ECM

>> Repair open circuit, short to ground or short to power in harness or connector.
6.CHECK FUEL TANK TEMPERATURE SENSOR
Refer to EC-240, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace fuel level sensor unit and fuel pump.
7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003591619

1.CHECK FUEL TANK TEMPERATURE SENSOR

1. Turn ignition switch OFF.

Revision: 2008 October EC-240 2009 Murano

 P0182, P0183 FTT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Remove fuel level sensor unit.
3. Check resistance between fuel level sensor unit and fuel pump A
terminals by heating with hot water as shown in the figure.

Terminals Condition Resistance EC

20 (68) 2.3 - 2.7 k
4 and 5 Temperature [C (F)]
50 (122) 0.79 - 0.90 k
C
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace fuel level sensor unit and fuel pump.
JMBIA0167ZZ D

Revision: 2008 October EC-241 2009 Murano

 P0196 EOT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0196 EOT SENSOR
Description INFOID:0000000003544688

The engine oil temperature sensor is used to detect the engine oil
temperature. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the engine oil tempera-
ture 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 oil temperature

Voltage* (V) Resistance (k)
[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
110 (230) 0.6 0.143 - 0.153
SEF012P

*: These data are reference values and are measured between ECM terminals 54
(Engine oil temperature sensor) and 52 (Sensor ground).

DTC Logic INFOID:0000000003544689

DTC DETECTION LOGIC

NOTE:
If DTC P0196 is displayed with P0197 or P0198, first perform the trouble diagnosis for DTC P0197,
P0198. Refer to EC-245, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Rationally incorrect voltage from the sensor is
Engine oil temperature Harness or connectors
sent to ECM, compared with the voltage signals
P0196 sensor range/perfor- (The sensor circuit is open or shorted)
from engine coolant temperature sensor and in-
mance Engine oil temperature sensor
take air temperature sensor.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.

Revision: 2008 October EC-242 2009 Murano

 P0196 EOT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds. A
5. Start engine and let it idle for 5 minutes and 10 seconds.
6. Check 1st trip DTC.
Is 1st trip DTC detected? EC
YES >> EC-243, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-II C
With CONSULT-III
1. Select DATA MONITOR mode with CONSULT-III.
2. Check that COOLAN TEMP/S indicates above 80C (176F). D
If it is above 80C (176F), go to the following steps.
If it is below 80C (176F), warm engine up until COOLAN TEMP/S indicates more than 80C (176F).
Then perform the following steps. E
3. Turn ignition switch OFF and soak the vehicle in a cool place.
4. Turn ignition switch ON.
NOTE:
Do not turn ignition switch OFF until step 8. F
5. Select DATA MONITOR mode with CONSULT-III.
6. Check the following.
G
COOLAN TEMP/S Below 40C (104F)
INT/A TEMP SE Below 40C (104F)
H
Difference between COOLAN TEMP/S and INT/A TEMP SE Within 6C (11F)
If they are within the specified range, perform the following steps.
If they are out of the specified range, soak the vehicle to meet the above conditions. Then perform the fol-
I
lowing steps.
NOTE:
Do not turn ignition switch OFF.
If it is supposed to need a long period of time, do not deplete the battery. J
7. Start engine and let it idle for 5 minutes.
8. Check 1st trip DTC.
With GST K
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> EC-243, "Diagnosis Procedure". L
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003544690

M
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection". N
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. O

2.CHECK ENGINE OIL TEMPERATURE SENSOR

Refer to EC-244, "Component Inspection". P
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace engine oil temperature sensor.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

Revision: 2008 October EC-243 2009 Murano

 P0196 EOT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
>> INSPECTION END
Component Inspection INFOID:0000000003544691

1.CHECK ENGINE OIL TEMPERATURE SENSOR

1. Turn ignition switch OFF.
2. Disconnect engine oil temperature sensor harness connector.
3. Remove engine oil temperature sensor.
4. Check resistance between engine oil temperature sensor termi-
nals by heating with hot water as shown in the figure.

Terminals Condition Resistance

20 (68) 2.1 - 2.9 k
1 and 2 Temperature [C (F)] 50 (122) 0.68 - 1.00 k
90 (194) 0.236 - 0.260 k
Is the inspection result normal?
YES >> INSPECTION END JMBIA0080ZZ
NO >> Replace engine oil temperature sensor.

Revision: 2008 October EC-244 2009 Murano

 P0197, P0198 EOT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0197, P0198 EOT SENSOR
A
Description INFOID:0000000003668898

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

SEF594K E

<Reference data>
F
Engine oil temperature
Voltage* (V) Resistance (k)
[C (F)]
10 (14) 4.4 7.0 - 11.4 G
20 (68) 3.5 2.1 - 2.9
50 (122) 2.2 0.68 - 1.00
H
90 (194) 0.9 0.236 - 0.260
110 (230) 0.6 0.143 - 0.153
SEF012P

*: These data are reference values and are measured between ECM terminals 54 I
(Engine oil temperature sensor) and 52 (Sensor ground).

DTC Logic INFOID:0000000003544693

J
DTC DETECTION LOGIC

Trouble Diagnosis K
DTC No. DTC detecting condition Possible Cause
Name
Engine oil tempera-
An excessively low voltage from the sensor is
P0197 ture sensor circuit low L
sent to ECM. Harness or connectors
input
(The sensor circuit is open or shorted.)
Engine oil tempera- Engine oil temperature sensor
An excessively high voltage from the sensor is
P0198 ture sensor circuit
sent to ECM. M
high input

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING N

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. O
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
P
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?

Revision: 2008 October EC-245 2009 Murano

 P0197, P0198 EOT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> Go to EC-246, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003544694

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK EOT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect engine oil temperature (EOT) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between EOT sensor harness connector and ground.

EOT sensor
Ground Voltage
Connector Terminal
F66 1 Ground Approx. 5 V
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK EOT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EOT sensor harness connector and ECM harness connector.

EOT sensor ECM

Continuity
Connector Terminal Connector Terminal
F66 2 F8 52 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK ENGINE OIL TEMPERATURE SENSOR
Refer to EC-246, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace engine oil temperature sensor.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003668899

1.CHECK ENGINE OIL TEMPERATURE SENSOR

1. Turn ignition switch OFF.
2. Disconnect engine oil temperature sensor harness connector.
3. Remove engine oil temperature sensor.

Revision: 2008 October EC-246 2009 Murano

 P0197, P0198 EOT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Check resistance between engine oil temperature sensor termi-
nals by heating with hot water as shown in the figure. A

Terminals Condition Resistance

20 (68) 2.1 - 2.9 k EC
1 and 2 Temperature [C (F)] 50 (122) 0.68 - 1.00 k
90 (194) 0.236 - 0.260 k
C
Is the inspection result normal?
YES >> INSPECTION END JMBIA0080ZZ
NO >> Replace engine oil temperature sensor. D

Revision: 2008 October EC-247 2009 Murano

 P0222, P0223 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0222, P0223 TP SENSOR
Description INFOID:0000000003591571

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 two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.

PBIB0145E

DTC Logic INFOID:0000000003388028

DTC DETECTION LOGIC

NOTE:
If DTC P0222 or P0223 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Throttle position sensor An excessively low voltage from the TP sensor Harness or connectors
P0222
1 circuit low input 1 is sent to ECM. (TP sensor 1 circuit is open or shorted.)
Throttle position sensor An excessively high voltage from the TP sensor Electric throttle control actuator
P0223 (TP sensor 1)
1 circuit high input 1 is sent to ECM.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-248, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388029

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.

Revision: 2008 October EC-248 2009 Murano

 P0222, P0223 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

2.CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-I A

1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
3. Check the voltage between electric throttle control actuator harness connector and ground.
EC

Electric throttle control actuator

Ground Voltage
Connector Terminal C
F29 1 Ground Approx. 5 V
Is the inspection result normal?
YES >> GO TO 3. D
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT E
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between electric throttle control actuator and ECM harness connector.
F

Electric throttle control actuator ECM

Continuity
Connector Terminal Connector Terminal G
F29 4 F8 36 Existed
4. Also check harness for short to ground and short to power.
H
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
I
4.CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between electric throttle control actuator and ECM harness connector.
J
Electric throttle control actuator ECM
Continuity
Connector Terminal Connector Terminal
K
F29 2 F8 37 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal? L
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK THROTTLE POSITION SENSOR M
Refer to EC-250, "Component Inspection".
Is the inspection result normal?
N
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR O
1. Replace electric throttle control actuator.
2. Refer to EC-250, "Special Repair Requirement".
P
>> INSPECTION END
7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Revision: 2008 October EC-249 2009 Murano

 P0222, P0223 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Component Inspection INFOID:0000000003597479

1.CHECK THROTTLE POSITION SENSOR

1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Perform EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
4. Turn ignition switch ON.
5. Set selector lever to D position.
6. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage
Connector
Terminal Terminal
37 Fully released More than 0.36 V
(TP sensor 1 sig-
nal) Fully depressed Less than 4.75 V
36
F8 Accelerator pedal
38 (Sensor ground) Fully released Less than 4.75 V
(TP sensor 2 sig-
nal) Fully depressed More than 0.36 V

Is the inspection result normal?

YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Go to EC-177, "Special Repair Requirement".

>> INSPECTION END

Special Repair Requirement INFOID:0000000003591585

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Revision: 2008 October EC-250 2009 Murano

 P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
< COMPONENT DIAGNOSIS > [VQ35DE]
P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
A
DTC Logic INFOID:0000000003388032

DTC DETECTION LOGIC EC

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.
C
Sensor Input signal to ECM ECM function
Crankshaft position sensor (POS) Engine speed On board diagnosis of misfire
The misfire detection logic consists of the following two conditions. D
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip, when a misfire condition occurs that can damage the three way catalyst (TWC) due to
overheating, the MIL will blink. E
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions
for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
F
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration) G
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
illuminate when the misfire is detected on a second trip. During this condition, the ECM monitors the CKP
sensor signal every 1,000 engine revolutions. H
A misfire malfunction can be detected in any one cylinder or in multiple cylinders.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause I
P0300 Multiple cylinder misfires detected Multiple cylinders misfire. Improper spark plug
Insufficient compression
P0301 No. 1 cylinder misfire detected No. 1 cylinder misfires.
Incorrect fuel pressure J
P0302 No. 2 cylinder misfire detected No. 2 cylinder misfires. The fuel injector circuit is open or shorted
Fuel injector
P0303 No. 3 cylinder misfire detected No. 3 cylinder misfires.
Intake air leakage
P0304 No. 4 cylinder misfire detected No. 4 cylinder misfires. The ignition signal circuit is open or shorted K
P0305 No. 5 cylinder misfire detected No. 5 cylinder misfires. Lack of fuel
Signal plate
A/F sensor 1
P0306 No. 6 cylinder misfire detected No. 6 cylinder misfires.
Incorrect PCV hose connection L

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING M
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. N
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
O
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
P
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. Turn ignition switch OFF and wait at least 10 seconds.
5. Restart engine and let it idle for approximately 15 minutes.
6. Check 1st trip DTC.
Is 1st trip DTC detected?

Revision: 2008 October EC-251 2009 Murano

 P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> Go to EC-252, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and drive the vehicle under similar conditions to (1st trip) Freeze Frame Data for a certain
time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
Similar conditions to (1st trip) Freeze Frame Data mean that the following conditions should be satisfied at
the same time.
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when
driving.

Engine speed Engine speed in the freeze frame data 400 rpm
Vehicle speed Vehicle speed in the freeze frame data 10 km/h (6 MPH)
Basic fuel schedule Basic fuel schedule in freeze frame data (1 0.1)
When the freeze frame data shows lower than 70C (158F),
Engine coolant temperature (T) T should be lower than 70C (158F).
condition When the freeze frame data shows higher than or equal to 70C (158F),
T should be higher than or equal to 70C (158F).
Driving time varies according to the engine speed in the freeze frame data.

Engine speed Time

Around 1,000 rpm Approximately 10 minutes
Around 2,000 rpm Approximately 5 minutes
More than 3,000 rpm Approximately 3.5 minutes
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-252, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388033

1.CHECK FOR INTAKE AIR LEAKAGE AND PCV HOSE

1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leakage.
3. Check PCV hose connection.
Is intake air leakage detected?
YES >> Discover air leakage location and repair.
NO >> GO TO 2.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 3.
YES-2 >> Without CONSULT-III: GO TO 4.
NO >> Repair or replace malfunctioning part.
3.PERFORM POWER BALANCE TEST
With CONSULT-III
1. Start engine.
2. Perform POWER BALANCE in ACTIVE TEST mode with CONSULT-III.

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 P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal? A
YES >> GO TO 9.
NO >> GO TO 4.
4.CHECK FUNCTION OF FUEL INJECTOR EC

1. Start engine and let it idle.

2. Listen to each fuel injector make operation sound.
C
Clicking sound should be heard.
Is the inspection result normal? D
YES >> GO TO 5.
NO >> Perform trouble diagnosis for FUEL INJECTOR, refer to
EC-444, "Diagnosis Procedure". E

PBIB3332E
F
5.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Perform the following procedure in a place with no combustible objects and good ventilation. G
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE: H
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.
3. Start engine.
4. After engine stalls, crank it 2 or 3 times to release all fuel pressure. I
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked. J
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal K
portion as shown in the figure.
11. Crank engine for approximately 3 seconds, and check whether
spark is generated between the spark plug and the grounded L
metal portion.

Spark should be generated.

M
CAUTION:
During the operation, always stay 0.5 m (19.7 in) or more
away from the spark plug and the ignition coil. Be careful JMBIA0066GB
N
not to get an electrical shock while checking, because the
electrical discharge voltage becomes 20 kV or more.
It might damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.
NOTE: O
When the gap is less than 13 mm (0.52 in), a spark might be generated even if the coil is malfunc-
tioning.
Is the inspection result normal? P
YES >> GO TO 9.
NO >> GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a non-malfunctioning spark plug.

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 P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark
plug and the grounded metal portion.

Spark should be generated.

Is the inspection result normal?
YES >> GO TO 7.
NO >> Check ignition coil, power transistor and their circuits. Refer to EC-451, "Diagnosis Procedure".
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
Is the inspection result normal?
YES >> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to EM-142, "Spark Plug".
NO >> Repair or clean spark plug. Then GO TO 8.

SEF156I

8.CHECK FUNCTION OF IGNITION COIL-III

1. Reconnect the initial spark plugs.
2. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark
plug and the grounded portion.

Spark should be generated.

Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-142, "Spark
Plug".
9.CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-23, "Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
1. Install all removed parts.
2. Release fuel pressure to zero. Refer to EC-545, "Inspection".
3. Install fuel pressure gauge kit [SST (J-44321)] and check fuel pressure. Refer to EC-545, "Inspection".

At idle: Approximately 350 kPa (3.57 kg/cm2, 51 psi)

Is the inspection result normal?
YES >> GO TO 12.
NO >> GO TO 11.
11.DETECT MALFUNCTIONING PART
Check fuel hoses and fuel tubes for clogging.
Is the inspection result normal?
YES >> Replace fuel filter and fuel pump assembly.
NO >> Repair or replace malfunctioning part.
12.CHECK IGNITION TIMING
Check idle speed and ignition timing.
For procedure, refer to EC-12, "BASIC INSPECTION : Special Repair Requirement".

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 P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
< COMPONENT DIAGNOSIS > [VQ35DE]
For specification, refer to EC-551, "Idle Speed" and EC-551, "Ignition Timing".
Is the inspection result normal? A
YES >> GO TO 13.
NO >> Follow the EC-12, "BASIC INSPECTION : Special Repair Requirement".
13.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT EC

1. Turn ignition switch OFF.

2. Disconnect corresponding A/F sensor 1 harness connector.
C
3. Disconnect ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

D
A/F sensor 1 ECM
Continuity
Bank Connector Terminal Connector Terminal
1 45 E
1 F27
2 49
F8 Existed
1 53
2 F64
2 57 F

5. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
G

A/F sensor 1
Ground Continuity
Bank Connector Terminal H
1
1 F27
2
Ground Not existed
1 I
2 F64
2

J
ECM
Ground Continuity
Connector Terminal
45 K
49
F8 Ground Not existed
53
L
57
6. Also check harness for short to power.
Is the inspection result normal? M
YES >> GO TO 14.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER N

Refer to EC-147, "Component Inspection".

Is the inspection result normal? O
YES >> GO TO 15.
NO >> Replace malfunctioning A/F sensor 1.
15.CHECK MASS AIR FLOW SENSOR P
With CONSULT-III
1. Check MASS AIR FLOW in DATA MONITOR mode with CONSULT-III.
2. For specification, refer to EC-551, "Mass Air Flow Sensor".
With GST
1. Check mass air flow sensor signal in Service $01 with GST.
2. For specification, refer to EC-551, "Mass Air Flow Sensor".

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 P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the measurement value within the specification?
YES >> GO TO 16.
NO >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
ground. Refer to EC-163, "Diagnosis Procedure".
16.CHECK SYMPTOM TABLE
Check items on the rough idle symptom in EC-533, "Symptom Table".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Repair or replace malfunctioning part.
17.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-102, "Diagnosis Descrip-
tion".

>> GO TO 18.
18.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Revision: 2008 October EC-256 2009 Murano

 P0327, P0328, P0332, P0333 KS
< COMPONENT DIAGNOSIS > [VQ35DE]
P0327, P0328, P0332, P0333 KS
A
Description INFOID:0000000003388034

The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A EC
knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a
voltage signal and sent to the ECM.
DTC Logic INFOID:0000000003388035 C

DTC DETECTION LOGIC

D
Trouble diagnosis
DTC No. DTC detected condition Possible cause
name
Knock sensor (bank 1) An excessively low voltage from the sensor is E
P0327
circuit low input sent to ECM.
Knock sensor (bank 1) An excessively high voltage from the sensor is
P0328 Harness or connectors
circuit high input sent to ECM.
(The sensor circuit is open or shorted.) F
Knock sensor (bank 2) An excessively low voltage from the sensor is Knock sensor
P0332
circuit low input sent to ECM.
Knock sensor (bank 2) An excessively high voltage from the sensor is
P0333 G
circuit high input sent to ECM.

DTC CONFIRMATION PROCEDURE

H
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test. I
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION: J
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>> GO TO 2. K
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and run it for at least 5 seconds at idle speed. L
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-257, "Diagnosis Procedure". M
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388036

N
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection". O
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. P

2.CHECK KNOCK SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Disconnect knock sensor harness connector and ECM harness connector.
2. Check the continuity between knock sensor harness connector and ECM harness connector.

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 P0327, P0328, P0332, P0333 KS
< COMPONENT DIAGNOSIS > [VQ35DE]

Knock sensor ECM

DTC Continuity
Bank Connector Terminal Connector Terminal
P0327, P0328 1 F201 2
F8 67 Existed
P0332, P0333 2 F202 2
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F200, F78
Harness for open or short between knock sensor and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between knock sensor harness connector and ECM harness connector.

Knock sensor ECM

DTC Continuity
Bank Connector Terminal Connector Terminal
P0327, P0328 1 F201 1 61
F8 Existed
P0332, P0333 2 F202 1 62
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F200, F78
Harness for open or short between knock sensor and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK KNOCK SENSOR
Refer to EC-258, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace malfunctioning knock sensor.
7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003388037

1.CHECK KNOCK SENSOR

1. Turn ignition switch OFF.
2. Disconnect knock sensor harness connector.
3. Check resistance between knock sensor terminal as per the following.
NOTE:

Revision: 2008 October EC-258 2009 Murano

 P0327, P0328, P0332, P0333 KS
< COMPONENT DIAGNOSIS > [VQ35DE]
It is necessary to use an ohmmeter which can measure more than 10 M.
A
Terminals Resistance
1 and 2 Approx. 532 - 588 k [at 20C (68F)]
EC
CAUTION:
Never use any knock sensors that have been dropped or physically damaged. Use only new ones.
Is the inspection result normal?
C
YES >> INSPECTION END
NO >> Replace malfunctioning knock sensor.
D

Revision: 2008 October EC-259 2009 Murano

 P0335 CKP SENSOR (POS)
< COMPONENT DIAGNOSIS > [VQ35DE]
P0335 CKP SENSOR (POS)
Description INFOID:0000000003388038

The crankshaft position sensor (POS) is located on the oil pan facing
the gear teeth (cogs) of the signal plate. It detects the fluctuation of
the engine revolution.
The sensor consists of a permanent magnet and Hall IC.
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
changes.
The ECM receives the voltage signal and detects the fluctuation of
JMBIA0062ZZ
the engine revolution.
ECM receives the signals as shown in the figure.

JMBIA0001GB

DTC Logic INFOID:0000000003388039

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
[CKP sensor (POS) circuit is open or
The crankshaft position sensor (POS) signal shorted.]
is not detected by the ECM during the first (APP sensor 2 circuit is shorted.)
few seconds of engine cranking. (EVAP control system pressure sensor
The proper pulse signal from the crankshaft circuit is shorted.)
Crankshaft position sen-
P0335 position sensor (POS) is not sent to ECM (Refrigerant pressure sensor circuit is
sor (POS) circuit
while the engine is running. shorted.)
The crankshaft position sensor (POS) signal Crankshaft position sensor (POS)
is not in the normal pattern during engine run- Accelerator pedal position sensor
ning. EVAP control system pressure sensor
Refrigerant pressure sensor
Signal plate

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V with igni-
tion switch ON.

>> GO TO 2.

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 P0335 CKP SENSOR (POS)
< COMPONENT DIAGNOSIS > [VQ35DE]

2.PERFORM DTC CONFIRMATION PROCEDURE A

1. Start engine and let it idle for at least 5 seconds.
If engine does not start, crank engine for at least 2 seconds.
2. Check 1st trip DTC.
EC
Is 1st trip DTC detected?
YES >> Go to EC-261, "Diagnosis Procedure".
NO >> INSPECTION END
C
Diagnosis Procedure INFOID:0000000003388040

1.CHECK GROUND CONNECTION D

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal? E
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT-I F

1. Disconnect crankshaft position (CKP) sensor (POS) harness connector.

2. Turn ignition switch ON. G
3. Check the voltage between CKP sensor (POS) harness connector and ground.

CKP sensor (POS) H

Ground Voltage (V)
Connector Terminal
F20 1 Ground Approx. 5
Is the inspection result normal? I
YES >> GO TO 8.
NO >> GO TO 3.
J
3.CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT-II
1. Turn ignition switch ON.
2. Disconnect ECM harness connector. K
3. Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.

CKP sensor (POS) ECM L

Continuity
Connector Terminal Connector Terminal
F20 1 F8 76 Existed
Is the inspection result normal? M
YES >> GO TO 4.
NO >> Repair open circuit.
N
4.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
O
ECM Sensor
Connector Terminal Name Connector Terminal
72 Refrigerant pressure sensor E300 1 P
F8
76 CKP sensor (POS) F20 1
87 APP sensor E110 5
E16
91 EVAP control system pressure sensor B17 3
Is the inspection result normal?
YES >> GO TO 5.

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 P0335 CKP SENSOR (POS)
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Repair short to ground or short to power in harness or connectors.
5.CHECK COMPONENTS
Check the following.
EVAP control system pressure sensor (Refer to EC-302, "Component Inspection".)
Refrigerant pressure sensor (Refer to EC-463, "Diagnosis Procedure".)
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace malfunctioning components.
6.CHECK APP SENSOR
Refer to EC-415, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 12.
NO >> GO TO 7.
7.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Refer to EC-415, "Special Repair Requirement".

>> INSPECTION END

8.CHECK CKP SENSOR (POS) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.

CKP sensor (POS) ECM

Continuity
Connector Terminal Connector Terminal
F20 2 F8 60 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
9.CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.

CKP sensor (POS) ECM

Continuity
Connector Terminal Connector Terminal
F20 3 F8 65 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
10.CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to EC-263, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 11.
NO >> Replace crankshaft position sensor (POS).
11.CHECK GEAR TOOTH
Visually check for chipping signal plate gear tooth.
Is the inspection result normal?

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 P0335 CKP SENSOR (POS)
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 12.
NO >> Replace the signal plate. A
12.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
EC

>> INSPECTION END

Component Inspection INFOID:0000000003388041 C

1.CHECK CRANKSHAFT POSITION SENSOR (POS)-I

D
1. Loosen the fixing bolt of the sensor.
2. Disconnect crankshaft position sensor (POS) harness connector.
3. Remove the sensor.
4. Visually check the sensor for chipping. E
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace crankshaft position sensor (POS) F

JMBIA0063ZZ H
2.CHECK CRANKSHAFT POSITION SENSOR (POS)-II
Check resistance crankshaft position sensor (POS) terminals as per the following. I

Terminal No. (Polarity) Resistance

1 (+) - 2 (-) J
1 (+) - 3 (-) Except 0 or [at 25C (77F)]
2 (+) - 3 (-)
K
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace crankshaft position sensor (POS)
L

Revision: 2008 October EC-263 2009 Murano

 P0340, P0345 CMP SENSOR (PHASE)
< COMPONENT DIAGNOSIS > [VQ35DE]
P0340, P0345 CMP SENSOR (PHASE)
Description INFOID:0000000003388042

The camshaft position sensor (PHASE) senses the protrusion of

camshaft (INT) to identify a particular cylinder. The camshaft position
sensor (PHASE) senses the piston position.
When the crankshaft position sensor (POS) system becomes inoper-
ative, the camshaft position sensor (PHASE) provides various con-
trols of engine parts instead, utilizing timing of cylinder identification
signals.
The sensor consists of a permanent magnet and Hall IC.
When 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
JMBIA0064ZZ
change.
Due to the changing magnetic field, the voltage from the sensor changes.
ECM receives the signals as shown in the figure.

JMBIA0001GB

DTC Logic INFOID:0000000003388043

DTC DETECTION LOGIC

NOTE:
If DTC P0340 or P0345 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Camshaft position sen- Harness or connectors
The cylinder No. signal is not sent to ECM for
P0340 sor (PHASE) (bank 1) (The sensor circuit is open or shorted)
the first few seconds during engine cranking.
circuit Camshaft position sensor (PHASE)
The cylinder No. signal is not sent to ECM
Camshaft (INT)
Camshaft position sen- during engine running.
Starter motor (Refer to STR-5.)
P0345 sor (PHASE) (bank 2) The cylinder No. signal is not in the normal
Starting system circuit (Refer to STR-5.)
circuit pattern during engine running.
Dead (Weak) battery

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V with igni-
tion switch ON.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
Revision: 2008 October EC-264 2009 Murano
 P0340, P0345 CMP SENSOR (PHASE)
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Start engine and let it idle for at least 5 seconds.
If engine does not start, crank engine for at least 2 seconds. A
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-265, "Diagnosis Procedure". EC
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-I
C
1. Maintaining engine speed at more than 800 rpm for at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
D
YES >> Go to EC-265, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388044 E

1.CHECK STARTING SYSTEM

Turn ignition switch to START position. F
Does the engine turn over? Does the starter motor operate?
YES >> GO TO 2.
NO >> Check starting system. (Refer to STR-2, "Work Flow".) G
2.CHECK GROUND CONNECTION
1. Turn ignition switch OFF. H
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 3. I
NO >> Repair or replace ground connection.
3.CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
1. Disconnect camshaft position (CMP) sensor (PHASE) harness connector. J
2. Turn ignition switch ON.
3. Check the voltage between CMP sensor (PHASE) harness connector and ground.
K
CMP sensor (PHASE)
DTC Ground Voltage (V)
Bank Connector Terminal
L
P0340 1 F26 1
Ground Approx. 5
P0345 2 F69 1
Is the inspection result normal? M
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT N
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector. O

CMP sensor (PHASE) ECM

DTC Continuity P
Bank Connector Terminal Connector Terminal
P0340 1 F26 2 64
F8 Existed
P0345 2 F69 2 68
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.

Revision: 2008 October EC-265 2009 Murano

 P0340, P0345 CMP SENSOR (PHASE)
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.

CMP sensor (PHASE) ECM

DTC Continuity
Bank Connector Terminal Connector Terminal
P0340 1 F26 3 70
F8 Existed
P0345 2 F69 3 69
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to EC-266, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace malfunctioning camshaft position sensor (PHASE).
7.CHECK CAMSHAFT (INT)
Check the following.
Accumulation of debris to the signal plate of camshaft rear end
Chipping signal plate of camshaft rear end
Is the inspection result normal?
YES >> GO TO 8.
NO >> Remove debris and clean the signal plate of camshaft
rear end or replace camshaft.

JMBIA0058ZZ

8.CHECK INTERMITTENT INCIDENT

Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003388045

1.CHECK CAMSHAFT POSITION SENSOR (PHASE)-I

1. Turn ignition switch OFF.
2. Loosen the fixing bolt of the sensor.
3. Disconnect camshaft position sensor (PHASE) harness connector.
4. Remove the sensor.
5. Visually check the sensor for chipping.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace malfunctioning camshaft position sensor
(PHASE).

JMBIA0065ZZ

Revision: 2008 October EC-266 2009 Murano

 P0340, P0345 CMP SENSOR (PHASE)
< COMPONENT DIAGNOSIS > [VQ35DE]

2.CHECK CAMSHAFT POSITION SENSOR (PHASE)-II A

Check resistance camshaft position sensor (PHASE) terminals as per the following.

Terminal No. (Polarity) Resistance EC

1 (+) - 2 (-)
1 (+) - 3 (-) Except 0 or [at 25C (77F)]
C
2 (+) - 3 (-)
Is the inspection result normal?
YES >> INSPECTION END D
NO >> Replace malfunctioning camshaft position sensor (PHASE).

Revision: 2008 October EC-267 2009 Murano

 P0420, P0430 THREE WAY CATALYST FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
P0420, P0430 THREE WAY CATALYST FUNCTION
DTC Logic INFOID:0000000003388046

DTC DETECTION LOGIC

The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of A/F sensor 1 and heated oxygen sensor
2 approaches a specified limit value, the three way catalyst (mani-
fold) malfunction is diagnosed.

PBIB2055E

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Catalyst system efficien- Three way catalyst (manifold)
P0420 cy below threshold Exhaust tube
Three way catalyst (manifold) does not oper-
(bank 1) Intake air leakage
ate properly.
Fuel injector
Catalyst system efficien- Three way catalyst (manifold) does not have
Fuel injector leakage
P0430 cy below threshold enough oxygen storage capacity.
Spark plug
(bank 2) Improper ignition timing

DTC CONFIRMATION PROCEDURE

1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 7.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Do not maintain engine speed for more than the specified minutes below.

>> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-I
With CONSULT-III
1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
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 1 minute under no load.
7. Let engine idle for 1 minute.
8. Check that COOLAN TEMP/S indicates more than 70C (158F).
If not, warm up engine and go to next step when COOLAN TEMP/S indication reaches 70C (158F).
9. Open engine hood.
10. Select DTC & SRT CONFIRMATION then SRT WORK SUPPORT mode with CONSULT-III.

Revision: 2008 October EC-268 2009 Murano

 P0420, P0430 THREE WAY CATALYST FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
11. Rev engine between 2,000 and 3,000 rpm and hold it for 3 consecutive minutes then release the acceler-
ator pedal completely. A
12. Check the indication of CATALYST.
Which is displayed on CONSULT-III screen?
CMPLT >> GO TO 6. EC
INCMP >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
C
1. Wait 5 seconds at idle.
2. Rev engine between 2,000 and 3,000 rpm and maintain it until INCMP of CATALYST changes to
CMPLT (It will take approximately 5 minutes).
Does the indication change to CMPLT? D
YES >> GO TO 6.
NO >> GO TO 5.
E
5.PERFORM DTC CONFIRMATION PROCEDURE AGAIN
1. Stop engine and cool it down to less than 70C (158F).
2. Perform DTC CONFIRMATION PROCEDURE again. F

>> GO TO 3.
6.PERFORM DTC CONFIRMATION PROCEDURE-III G
Check 1st trip DTC.
Is 1st trip DTC detected? H
YES >> Go to EC-270, "Diagnosis Procedure".
NO >> INSPECTION END
7.PERFORM COMPONENT FUNCTION CHECK I
Perform component function check. Refer to EC-269, "Component Function Check".
NOTE:
Use component function check to check the overall function of the three way catalyst (manifold). During this J
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END K
NO >> Go to EC-270, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388047
L
1.PERFORM COMPONENT FUNCTION CHECK
Without CONSULT-III M
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds. N
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
6. Let engine idle for 1 minute.
7. Open engine hood. O
8. Check the voltage between ECM harness connector terminals under the following conditions.

Revision: 2008 October EC-269 2009 Murano

 P0420, P0430 THREE WAY CATALYST FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM
DTC Connec- + Condition Voltage (V)
tor Terminal Terminal
33
P0420 [HO2S2 (bank 1) The voltage fluctuation cycle takes
signal] 35
Keeping engine speed at 2,500 rpm more than 5 seconds.
F8 (Sensor
34 constant under no load 1 cycle: 0.6 - 1.0 0 - 0.3 0.6 -
ground)
P0430 [HO2S2 (bank 2) 1.0
signal]
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-270, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388048

1.CHECK EXHAUST SYSTEM

Visually check exhaust tubes and muffler for dents.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace malfunctioning part.
2.CHECK EXHAUST GAS LEAKAGE
1. Start engine and run it at idle.
2. Listen for an exhaust gas leakage before the three way catalyst (manifold).

PBIB1216E

Is exhaust gas leakage detected?

YES >> Repair or replace malfunctioning part.
NO >> GO TO 3.
3.CHECK INTAKE AIR LEAKAGE
Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
YES >> Repair or replace malfunctioning part.
NO >> GO TO 4.
4.CHECK IGNITION TIMING
Check idle speed and ignition timing.
For procedure, refer to EC-12, "BASIC INSPECTION : Special Repair Requirement".
For specification, refer to EC-551, "Idle Speed" and EC-551, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Follow the EC-12, "BASIC INSPECTION : Special Repair Requirement".
5.CHECK FUEL INJECTORS
1. Stop engine and then turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals.

Revision: 2008 October EC-270 2009 Murano

 P0420, P0430 THREE WAY CATALYST FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
+ Voltage
Connector Terminal Connector Terminal
EC
1
3
29 C
F7 E16 112 Battery voltage
30
31
D
32
Is the inspection result normal?
YES >> GO TO 6. E
NO >> Perform EC-444, "Diagnosis Procedure".
6.CHECK FUNCTION OF IGNITION COIL-I
CAUTION: F
Perform the following procedure in a place with no combustible objects and good ventilation.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure. G
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.
H
3. Start engine.
4. After engine stalls, crank it 2 or 3 times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils. I
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil. J
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
11. Crank engine for approximately 3 seconds, and check whether K
spark is generated between the spark plug and the grounded
metal portion.
L
Spark should be generated.
CAUTION:
During the operation, always stay 0.5 m (19.7 in) or more M
away from the spark plug and the ignition coil. Be careful JMBIA0066GB

not to get an electrical shock while checking, because the

electrical discharge voltage becomes 20 kV or more.
It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken. N
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
functioning. O
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 7. P
7.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark
plug and the grounded metal portion.

Revision: 2008 October EC-271 2009 Murano

 P0420, P0430 THREE WAY CATALYST FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]

Spark should be generated.

Is the inspection result normal?
YES >> GO TO 8.
NO >> Check ignition coil, power transistor and their circuit. Refer to EC-451, "Diagnosis Procedure".
8.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
Is the inspection result normal?
YES >> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to EM-142, "Spark Plug".
NO >> Repair or clean spark plug. Then GO TO 9.

SEF156I

9.CHECK FUNCTION OF IGNITION COIL-III

1. Reconnect the initial spark plugs.
2. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark
plug and the grounded portion.

Spark should be generated.

Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-142, "Spark
Plug".
10.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Remove fuel injector assembly.
Refer to EM-45, "Removal and Installation".
Keep fuel hose and all fuel injectors connected to fuel tube.
3. Disconnect all ignition coil harness connectors.
4. Reconnect all fuel injector harness connectors disconnected.
5. Turn ignition switch ON.
6. Check that the fuel does not drip from fuel injector.
Does fuel drip from fuel injector?
YES >> Replace the fuel injector(s) from which fuel is dripping.
NO >> GO TO 11.
11.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> Replace three way catalyst assembly.
NO >> Repair or replace harness or connector.

Revision: 2008 October EC-272 2009 Murano

 P0441 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
P0441 EVAP CONTROL SYSTEM
A
DTC Logic INFOID:0000000003388049

DTC DETECTION LOGIC EC

NOTE:
If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform
trouble diagnosis for other DTC. C
In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions.
Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP
canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP con-
trol system pressure sensor to intake manifold vacuum. D
Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow
are adequate. If not, a malfunction is determined.
E

PBIB1026E
J

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
EVAP canister purge volume control so- K
lenoid valve stuck closed
EVAP control system pressure sensor
and the circuit
Loose, disconnected or improper con- L
EVAP control system does not operate proper-
nection of rubber tube
EVAP control system in- ly, EVAP control system has a leakage between
P0441 Blocked rubber tube
correct purge flow intake manifold and EVAP control system pres-
Cracked EVAP canister
sure sensor.
EVAP canister purge volume control so-
M
lenoid valve circuit
Accelerator pedal position sensor
Blocked purge port N
EVAP canister vent control valve

DTC CONFIRMATION PROCEDURE

O
1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used? P
YES >> GO TO 2.
NO >> GO TO 6.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.

Revision: 2008 October EC-273 2009 Murano

 P0441 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5C (41F) or more.

>> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-I
With CONSULT-III
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. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and let it idle for at least 70 seconds.
6. Select PURG FLOW P0441 of EVAPORATIVE SYSTEM in DTC WORK SUPPORT mode with CON-
SULT-III.
7. Touch START.
Is COMPLETED displayed on CONSULT-III screen?
YES >> GO TO 5.
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
When the following conditions are met, TESTING will be displayed on the CONSULT-III screen. Maintain the
conditions continuously until TESTING changes to COMPLETED. (It will take at least 35 seconds.)

Selector lever Suitable position

VHCL SPEED SE 32 - 120 km/h (20 - 75 mph)
ENG SPEED 500 - 3,000 rpm
B/FUEL SCHDL 1.3 - 9.0 msec
COOLAN TEMP/S More than 0C (32F)
CAUTION:
Always drive vehicle at a safe speed.
If TESTING does not change for a long time, retry from step 2.
Is COMPLETED displayed on CONSULT-III screen?
YES >> GO TO 5.
NO >> Perform DTC CONFIRMATION PROCEDURE again. GO TO 3.
5.PERFORM DTC CONFIRMATION PROCEDURE-III
Touch SELF-DIAG RESULTS.
Which is displayed on CONSULT-III screen?
OK >> INSPECTION END
NG >> Go to EC-275, "Diagnosis Procedure".
6.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-274, "Component Function Check".
NOTE:
Use component function check to check the overall monitoring function of the EVAP control system purge flow
monitoring. During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-275, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388050

1.PERFORM COMPONENT FUNCTION CHECK

Without CONSULT-III

Revision: 2008 October EC-274 2009 Murano

 P0441 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Lift up drive wheels.
2. Start engine (VDC switch OFF) and warm it up to normal operating temperature. A
3. Turn ignition switch OFF, wait at least 10 seconds.
4. Turn ignition switch ON.
5. Turn ignition switch OFF, wait at least 10 seconds.
EC
6. Start engine and wait at least 70 seconds.
7. Set voltmeter probes to ECM harness connector terminals under the following conditions.

C
ECM
+
Connector
Terminal Terminal D
86 96
E16
(EVAP control system pressure sensor signal) (Sensor ground)
8. Check EVAP control system pressure sensor value at idle speed and note it. E
9. Establish and maintain the following conditions for at least 1 minute.

Air conditioner switch ON F

Head lamp switch ON
Rear window defogger switch ON
G
Engine speed Approx. 3,000 rpm
Gear position Any position other than P, N or R
10. Verify that EVAP control system pressure sensor value stays 0.1 V less than the value at idle speed (mea- H
sured at step 6) for at least 1 second.
Is the inspection result normal?
YES >> INSPECTION END I
NO >> Go to EC-275, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388051
J
1.CHECK EVAP CANISTER
1. Turn ignition switch OFF.
K
2. Check EVAP canister for cracks.
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 2. L
YES-2 >> Without CONSULT-III: GO TO 3.
NO >> Replace EVAP canister.
2.CHECK PURGE FLOW M
With CONSULT-III
1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to EC-77, "System Dia- N
gram".
2. Start engine and let it idle.
3. Select PURG VOL C/V in ACTIVE TEST mode with CONSULT-III.
4. Touch Qd and Qu on CONSULT-III screen to adjust PURG VOL C/V opening and check vacuum O
existence.

PURG VOL C/V Vacuum P

100% Existed
0% Not existed
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 4.

Revision: 2008 October EC-275 2009 Murano

 P0441 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]

3.CHECK PURGE FLOW

Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to EC-77, "System Dia-
gram".
4. Start engine and let it idle.
Do not depress accelerator pedal even slightly.
5. Check vacuum gauge indication before 60 seconds pass after starting engine.

Vacuum should not exist.

6. Rev engine up to 2,000 rpm after 100 seconds pass after starting engine.

Vacuum should exist.

Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 4.
4.CHECK EVAP PURGE LINE
1. Turn ignition switch OFF.
2. Check EVAP purge line for improper connection or disconnection.
Refer to EC-77, "System Diagram".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair EVAP purge line.
5.CHECK EVAP PURGE HOSE AND PURGE PORT
1. Disconnect purge hoses connected to EVAP service port A and
EVAP canister purge volume control solenoid valve B.
2. Blow air into each hose and EVAP purge port C.

SEF367U

3. Check that air flows freely.

Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 6.
YES-2 >> Without CONSULT-III: GO TO 7.
NO >> Repair or clean hoses and/or purge port.

SEF368U

6.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT-III
1. Start engine.
2. Perform PURG VOL C/V in ACTIVE TEST mode with CONSULT-III. Check that engine speed varies
according to the valve opening.

Revision: 2008 October EC-276 2009 Murano

 P0441 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
Does engine speed vary according to the valve opening?
YES >> GO TO 8. A
NO >> GO TO 7.
7.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC
Refer to EC-287, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 8. C
NO >> Replace EVAP canister purge volume control solenoid valve.
8.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector. D
2. Check that water is not inside connectors.
Is the inspection result normal?
YES >> GO TO 9. E
NO >> Replace EVAP control system pressure sensor.
9.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION F
Refer to EC-303, "DTC Logic" for DTC P0452, EC-308, "DTC Logic" for DTC P0453.
Is the inspection result normal?
YES >> GO TO 10. G
NO >> Replace EVAP control system pressure sensor.
10.CHECK RUBBER TUBE FOR CLOGGING
H
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
Is the inspection result normal?
I
YES >> GO TO 11.
NO >> Clean the rubber tube using an air blower.
11.CHECK EVAP CANISTER VENT CONTROL VALVE J
Refer to EC-294, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 12. K
NO >> Replace EVAP canister vent control valve.
12.CHECK EVAP PURGE LINE L
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leakage.
Refer to EC-77, "System Diagram".
Is the inspection result normal?
M
YES >> GO TO 13.
NO >> Repair EVAP purge line.
13.CLEAN EVAP PURGE LINE N
Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 14. O

14.CHECK INTERMITTENT INCIDENT

Refer to GI-40, "Intermittent Incident". P

>> INSPECTION END

Revision: 2008 October EC-277 2009 Murano

 P0442 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
P0442 EVAP CONTROL SYSTEM
DTC Logic INFOID:0000000003388052

DTC DETECTION LOGIC

This diagnosis detects leakage in the EVAP purge line using engine intake manifold vacuum.
If pressure does not increase, the ECM will check for leakage in the line between the fuel tank and EVAP can-
ister purge volume control solenoid valve, under the following Vacuum test conditions.
The EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge vol-
ume control solenoid valve will then be opened to depressurize the EVAP purge line using intake manifold
vacuum. After this occurs, the EVAP canister purge volume control solenoid valve will be closed.

PBIB1026E

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Incorrect fuel tank vacuum relief valve
Incorrect fuel filler cap used
Fuel filler cap remains open or does not close.
Foreign matter caught in fuel filler cap.
Leakage is in line between intake manifold and
EVAP canister purge volume control solenoid
valve.
Foreign matter caught in EVAP canister vent con-
trol valve.
EVAP canister or fuel tank leakage
EVAP purge line (pipe and rubber tube) leakage
EVAP control system EVAP control system has a leakage,
EVAP purge line rubber tube bent
P0442 small leakage detected EVAP control system does not operate
Loose or disconnected rubber tube
(negative pressure) properly.
EVAP canister vent control valve and the circuit
EVAP canister purge volume control solenoid
valve and the circuit
Fuel tank temperature sensor
O-ring of EVAP canister vent control valve is
missing or damaged
EVAP canister is saturated with water
EVAP control system pressure sensor
Fuel level sensor and the circuit
Refueling EVAP vapor cut valve
ORVR system leakage
CAUTION:
Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may illuminate.
If the fuel filler cap is not tightened properly, the MIL may illuminate.
Use only a genuine NISSAN rubber tube as a replacement.
DTC CONFIRMATION PROCEDURE
Revision: 2008 October EC-278 2009 Murano
 P0442 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]

1.PRECONDITIONING A
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
EC
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Perform DTC WORK SUPPORT when the fuel level is between 1/4 and 3/4 full, and vehicle is placed C
on flat level surface.
Always perform test at a temperature of 0 to 30C (32 to 86F).
NOTE:
D
Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
Will CONSULT-III be used?
YES >> GO TO 2. E
NO >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III F
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III. G
4. Check that the following conditions are met.
COOLAN TEMP/S: 0 - 70C (32 - 158F)
INT/A TEMP SE: 0 - 30C (32 - 86F)
5. Select EVP SML LEAK P0442/P1442 of EVAPORATIVE SYSTEM in DTC WORK SUPPORT mode H
with CONSULT-III.
Follow the instructions displayed.
NOTE: I
If the engine speed cannot be maintained within the range displayed on the CONSULT-III screen, go to
EC-12, "BASIC INSPECTION : Special Repair Requirement".
Which is displayed on CONSULT-III screen? J
OK >> INSPECTION END
NG >> Go to EC-279, "Diagnosis Procedure".
3.PERFORM COMPONENT FUNCTION CHECK K
With GST
NOTE:
Be sure to read the explanation of DRIVING PATTERN in EC-524, "How to Set SRT Code" before driving L
vehicle.
1. Start engine.
2. Drive vehicle according to DRIVING PATTERN. M
3. Stop vehicle.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Turn ignition switch OFF and wait at least 10 seconds. N
7. Turn ignition switch ON.
8. Check 1st trip DTC.
Is 1st trip DTC displayed? O
YES-1 >> P0441: Go to EC-275, "Diagnosis Procedure".
YES-2 >> P0442: Go to EC-279, "Diagnosis Procedure".
NO >> INSPECTION END P
Diagnosis Procedure INFOID:0000000003388053

1.CHECK FUEL FILLER CAP DESIGN

1. Turn ignition switch OFF.

Revision: 2008 October EC-279 2009 Murano

 P0442 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Check for genuine NISSAN fuel filler cap design.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace with genuine NISSAN fuel filler cap.

SEF915U

2.CHECK FUEL FILLER CAP INSTALLATION

Check that the cap is tightened properly by rotating the cap clockwise.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Retighten until
ratcheting sound is heard.
3.CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK FUEL TANK VACUUM RELIEF VALVE
Refer to EC-283, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace fuel filler cap with a genuine one.
5.CHECK FOR EVAP LEAKAGE
Refer to EC-547, "Inspection".
Is there any leakage in EVAP line?
YES >> Repair or replace malfunctioning part.
NO >> GO TO 6.
6.CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
EVAP canister vent control valve is installed properly.
Refer to EC-549, "Removal and Installation".
EVAP canister vent control valve.
Refer to EC-294, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace EVAP canister vent control valve and O-ring.
7.CHECK IF EVAP CANISTER IS SATURATED WITH WATER

Revision: 2008 October EC-280 2009 Murano

 P0442 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
Remove EVAP canister with EVAP canister vent control valve and
EVAP control system pressure sensor attached. A
Does water drain from the EVAP canister?
YES >> GO TO 8.
NO-1 >> With CONSULT-III: GO TO 10. EC
NO-2 >> Without CONSULT-III: GO TO 11.

JMBIA1134GB

8.CHECK EVAP CANISTER D

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
E
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 10.
F
YES-2 >> Without CONSULT-III: GO TO 11.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING PART G
Check the following.
EVAP canister for damage
EVAP hose between EVAP canister and vehicle frame for clogging or poor connection H

>> Repair hose or replace EVAP canister.

10.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION I

With CONSULT-III
1. Disconnect vacuum hose from EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine. J
3. Perform PURG VOL C/V in ACTIVE TEST mode.
4. Touch Qu on CONSULT-III screen to increase PURG VOL C/V opening to 100%.
5. Check vacuum hose for vacuum. K

Vacuum should exist.

Is the inspection result normal? L
YES >> GO TO 13.
NO >> GO TO 12.
11.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION M

Without CONSULT-III
1. Start engine and warm it up to normal operating temperature. N
2. Stop engine.
3. Disconnect vacuum hose from EVAP canister purge volume control solenoid valve at EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm. O

Vacuum should exist.

Is the inspection result normal? P
YES >> GO TO 13.
NO >> GO TO 12.
12.CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to EC-77, "System Diagram".
Is the inspection result normal?

Revision: 2008 October EC-281 2009 Murano

 P0442 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 13.
NO >> Repair or reconnect the hose.
13.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to EC-287, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 14.
NO >> Replace EVAP canister purge volume control solenoid valve.
14.CHECK FUEL TANK TEMPERATURE SENSOR
Refer to EC-238, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 15.
NO >> Replace fuel level sensor unit and fuel pump.
15.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-302, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace EVAP control system pressure sensor.
16.CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Refer to EC-77, "System Diagram".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Repair or reconnect the hose.
17.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 18.
18.CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper
connection. For location, refer to EC-457, "Description".
Is the inspection result normal?
YES >> GO TO 19.
NO >> Repair or replace hoses and tubes.
19.CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and
improper connection.
Is the inspection result normal?
YES >> GO TO 20.
NO >> Repair or replace hose, tube or filler neck tube.
20.CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to EC-460, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 21.
NO >> Replace refueling EVAP vapor cut valve with fuel tank.
21.CHECK FUEL LEVEL SENSOR
Refer to MWI-47, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 22.

Revision: 2008 October EC-282 2009 Murano

 P0442 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Replace fuel level sensor unit and fuel pump.
22.CHECK INTERMITTENT INCIDENT A

Refer to GI-40, "Intermittent Incident".

EC
>> INSPECTION END
Component Inspection INFOID:0000000003388054
C
1.CHECK FUEL FILLER CAP
1. Turn ignition switch OFF.
D
2. Remove fuel filler cap.
3. Wipe clean valve housing.

G
SEF445Y

H
4. Install fuel filler cap adapter (commercial service tool) to fuel filler cap.
5. Check valve opening pressure and vacuum.

Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm2, 2.22 - I

2.90 psi)
Vacuum: 6.0 to 3.3 kPa (0.061 to 0.034 kg/cm2, J
0.87 to 0.48 psi)
Is the inspection result normal?
YES >> INSPECTION END K
NO >> GO TO 2.
SEF943S

2.REPLACE FUEL FILLER CAP L

Replace fuel filler cap.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may M
illuminate.

>> INSPECTION END N

Revision: 2008 October EC-283 2009 Murano

 P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Description INFOID:0000000003388055

The EVAP canister purge volume control solenoid valve is used 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.

PBIB3489E

DTC Logic INFOID:0000000003388056

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
EVAP control system pressure sensor
EVAP canister purge volume control so-
lenoid valve
The canister purge flow is detected during the
EVAP canister purge (The valve is stuck open.)
specified driving conditions, even when EVAP
P0443 volume control solenoid EVAP canister vent control valve
canister purge volume control solenoid valve is
valve EVAP canister
completely closed.
Hoses
(Hoses are connected incorrectly or
clogged.)

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5C (41F) or more.
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
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. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Select PURG VOL C/V P1444 of EVAPORATIVE SYSTEM in DTC WORK SUPPORT mode with
CONSULT-III.
7. Touch START.
8. Start engine and let it idle until TESTING on CONSULT-III changes to COMPLETED. (It will take
approximately 10 seconds.)
If TESTING is not displayed after 5 minutes, retry from step 2.
9. Touch SELF-DIAG RESULTS.
Which is displayed on CONSULT-III screen?

Revision: 2008 October EC-284 2009 Murano

 P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
OK >> INSPECTION END
NG >> Go to EC-285, "Diagnosis Procedure". A
3.PERFORM DTC CONFIRMATION PROCEDURE
With GST EC
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. Turn ignition switch OFF and wait at least 10 seconds. C
5. Start engine and let it idle for at least 20 seconds.
6. Check 1st trip DTC.
Is 1st trip DTC displayed? D
YES >> Go to EC-285, "Diagnosis Procedure".
NO >> INSPECTION END
E
Diagnosis Procedure INFOID:0000000003388057

1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
F
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check the voltage between EVAP canister purge volume control solenoid valve harness connector and G
ground.

EVAP canister purge volume control H

solenoid valve Ground Voltage
Connector Terminal
F30 1 Ground Battery voltage I

Is the inspection result normal?

YES >> GO TO 3. J
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following. K
Harness connectors F121, E7
Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
Harness for open or short between EVAP canister purge volume control solenoid valve and ECM L

>> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT M
FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector. N
3. Check the continuity between EVAP canister purge volume control solenoid valve harness connector and
ECM harness connector.
O
EVAP canister purge volume con-
ECM
trol solenoid valve Continuity
Connector Terminal Connector Terminal P
F30 2 F7 25 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.

Revision: 2008 October EC-285 2009 Murano

 P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]

4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1. Disconnect EVAP control system pressure sensor harness connector.
2. Check that water is not inside connectors.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace EVAP control system pressure sensor.
5.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-302, "Component Inspection".
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 6.
YES-2 >> Without CONSULT-III: GO TO 7.
NO >> Replace EVAP control system pressure sensor.
6.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
3. Start engine.
4. Perform PURG VOL C/V in ACTIVE TEST mode with CONSULT-III. Check that engine speed varies
according to the valve opening.
Does engine speed vary according to the valve opening?
YES >> GO TO 8.
NO >> GO TO 7.
7.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to EC-287, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace EVAP canister purge volume control solenoid valve.
8.CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Clean the rubber tube using an air blower.
9.CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to EC-294, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Replace EVAP canister vent control valve.
10.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
Remove EVAP canister with EVAP canister vent control valve and
EVAP control system pressure sensor attached.
Does water drain from the EVAP canister?
YES >> GO TO 11.
NO >> GO TO 13.

JMBIA1134GB

Revision: 2008 October EC-286 2009 Murano

 P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]

11.CHECK EVAP CANISTER A

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
EC
Is the inspection result normal?
YES >> GO TO 13.
NO >> GO TO 12.
C
12. DETECT MALFUNCTIONING PART
Check the following.
EVAP canister for damage D
EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister. E

13.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident". F

>> INSPECTION END

Component Inspection INFOID:0000000003388058
G

1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

H
With CONSULT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve. I
4. Turn ignition switch ON.
5. Select PURG VOL C/V in ACTIVE TEST mode with CONSULT-III.
6. Touch Qd and Qu on CONSULT-III screen to adjust PURG J
VOL C/V opening and check air passage continuity of EVAP
canister purge volume control solenoid valve under the following
conditions.
K

Condition Air passage continuity

(PURG VOL C/V value) between (A) and (B)
L
100% Existed
0% Not existed
PBIB2058E M

Without CONSULT-III
1. Turn ignition switch OFF. N
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4. Check air passage continuity of EVAP canister purge volume
control solenoid valve under the following conditions. O

Air passage continuity

Condition P
between (A) and (B)
12 V direct current supply between
Existed
terminals 1 and 2
No supply Not existed
Is the inspection result normal?
YES >> INSPECTION END PBIB2059E

Revision: 2008 October EC-287 2009 Murano

 P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Replace EVAP canister purge volume control solenoid valve

Revision: 2008 October EC-288 2009 Murano

 P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
A
VALVE
Description INFOID:0000000003597996
EC
The EVAP canister purge volume control solenoid valve is used 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 C
pulses from the ECM. The longer the ON pulse, the greater the
amount of fuel vapor that will flow through the valve.
D

E
PBIB3489E

DTC Logic INFOID:0000000003388060

F

DTC DETECTION LOGIC

G
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
EVAP canister purge volume (The solenoid valve circuit is open or
An excessively low voltage signal is sent H
P0444 control solenoid valve circuit shorted.)
to ECM through the valve
open EVAP canister purge volume control so-
lenoid valve
Harness or connectors I
EVAP canister purge volume
An excessively high voltage signal is sent (The solenoid valve circuit is shorted.)
P0445 control solenoid valve circuit
to ECM through the valve EVAP canister purge volume control so-
shorted
lenoid valve
J
DTC CONFIRMATION PROCEDURE
1.CONDITIONING
K
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. L
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle. M

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE N

1. Start engine and let it idle for at least 13 seconds.

2. Check 1st trip DTC.
O
Is 1st trip DTC detected?
YES >> Go to EC-289, "Diagnosis Procedure".
NO >> INSPECTION END
P
Diagnosis Procedure INFOID:0000000003388061

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.
3. Turn ignition switch ON.

Revision: 2008 October EC-289 2009 Murano

 P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Check the voltage between EVAP canister purge volume control solenoid valve harness connector and
ground.

EVAP canister purge volume control

solenoid valve Ground Voltage
Connector Terminal
F30 1 Ground Battery voltage
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F121, E7
Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
Harness for open or short between EVAP canister purge volume control solenoid valve and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.
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 the continuity between EVAP canister purge volume control solenoid valve harness connector and
ECM harness connector.

EVAP canister purge volume con-

ECM
trol solenoid valve Continuity
Connector Terminal Connector Terminal
F30 2 F7 25 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 4.
YES-2 >> Without CONSULT-III: GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform PURG VOL C/V in ACTIVE TEST mode with CONSULT-III. Check that engine speed varies
according to the valve opening.
Does engine speed vary according to the valve opening?
YES >> GO TO 6.
NO >> GO TO 5.
5.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to EC-291, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace EVAP canister purge volume control solenoid valve.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

Revision: 2008 October EC-290 2009 Murano

 P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
>> INSPECTION END
A
Component Inspection INFOID:0000000003591644

1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE EC

With CONSULT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
C
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4. Turn ignition switch ON.
5. Select PURG VOL C/V in ACTIVE TEST mode with CONSULT-III.
6. Touch Qd and Qu on CONSULT-III screen to adjust PURG D
VOL C/V opening and check air passage continuity of EVAP
canister purge volume control solenoid valve under the following
conditions. E

Condition Air passage continuity

(PURG VOL C/V value) between (A) and (B)
F
100% Existed
0% Not existed
PBIB2058E G

Without CONSULT-III
1. Turn ignition switch OFF. H
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4. Check air passage continuity of EVAP canister purge volume
I
control solenoid valve under the following conditions.

Air passage continuity

Condition J
between (A) and (B)
12 V direct current supply between
Existed
terminals 1 and 2
K
No supply Not existed
Is the inspection result normal?
YES >> INSPECTION END PBIB2059E
L
NO >> Replace EVAP canister purge volume control solenoid
valve
M

Revision: 2008 October EC-291 2009 Murano

 P0447 EVAP CANISTER VENT CONTROL VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
P0447 EVAP CANISTER VENT CONTROL VALVE
Description INFOID:0000000003388063

The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows EVAP
PBIB1263E
Control System diagnosis.
DTC Logic INFOID:0000000003388064

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
(The valve circuit is open or shorted.)
EVAP canister vent con- An improper voltage signal is sent to ECM EVAP canister vent control valve
P0447
trol valve circuit open through EVAP canister vent control valve. Hoses
(Hoses are connected incorrectly or
clogged.)

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait at least 8 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-292, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388065

1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT
With CONSULT-III

Revision: 2008 October EC-292 2009 Murano

 P0447 EVAP CANISTER VENT CONTROL VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Turn ignition switch OFF and then ON.
2. Select VENT CONTROL/V in ACTIVE TEST mode with CONSULT-III. A
3. Touch ON/OFF on CONSULT-III screen.
4. Check for operating sound of the valve.
EC
Clicking sound should be heard.
Is the inspection result normal?
YES >> GO TO 7. C
NO >> GO TO 3.
3.CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT
D
1. Turn ignition switch OFF.
2. Disconnect EVAP canister vent control valve harness connector.
3. Turn ignition switch ON.
4. Check the voltage between EVAP canister vent control valve harness connector and ground. E

EVAP canister vent control valve

Ground Voltage
Connector Terminal F
B65 1 Ground Battery voltage
Is the inspection result normal? G
YES >> GO TO 5.
NO >> GO TO 4.
4.DETECT MALFUNCTIONING PART H
Check the following.
Harness connectors F121, E7
Harness connectors E104, B4 I
Harness for open or short between EVAP canister vent control valve and IPDM E/R

>> Repair open circuit, short to ground or short to power in harness or connectors. J
5.CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF. K
2. Disconnect ECM harness connector.
3. Check the continuity between ECM harness connector and EVAP canister vent control valve harness con-
nector.
Refer to Wiring Diagram. L

EVAP canister vent control valve ECM

Continuity M
Connector Terminal Connector Terminal
B65 2 E16 109 Existed
4. Also check harness for short to ground and short to power. N
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6. O
6.DETECT MALFUNCTIONING PART
Check the following.
P
Harness connectors E104, B4
Harness for open or short between EVAP canister vent control valve and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.
7.CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.

Revision: 2008 October EC-293 2009 Murano

 P0447 EVAP CANISTER VENT CONTROL VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Check the rubber tube for clogging.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Clean the rubber tube using an air blower.
8.CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to EC-294, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace EVAP canister vent control valve.
9.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003388066

1.CHECK EVAP CANISTER VENT CONTROL VALVE-I

1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion (A) of EVAP canister vent control valve for rust.
Is it rusted?
YES >> Replace EVAP canister vent control valve.
NO >> GO TO 2.

JMBIA0168ZZ

2.CHECK EVAP CANISTER VENT CONTROL VALVE-II

With CONSULT-III
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform VENT CONTROL/V in ACTIVE TEST mode.
4. Check air passage continuity and operation delay time.
Check that new O-ring is installed properly.

Condition VENT CONTROL/V Air passage continuity between (A) and (B)
ON Not existed
OFF Existed
Operation takes less than 1 second.
Without CONSULT-III
1. Disconnect EVAP canister vent control valve harness connector.
2. Check air passage continuity and operation delay time under the JMBIA0169ZZ

following conditions.
Check that new O-ring is installed properly.

Condition Air passage continuity between (A) and (B)

12 V direct current supply between
Not existed
terminals 1 and 2
OFF Existed
Operation takes less than 1 second.

Revision: 2008 October EC-294 2009 Murano

 P0447 EVAP CANISTER VENT CONTROL VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the inspection result normal?
YES >> INSPECTION END A
NO >> GO TO 3.
3.CHECK EVAP CANISTER VENT CONTROL VALVE-III
EC
With CONSULT-III
1. Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
2. Perform VENT CONTROL/V in ACTIVE TEST mode.
3. Check air passage continuity and operation delay time. C
Check that new O-ring is installed properly.

Condition VENT CONTROL/V Air passage continuity between (A) and (B)
D
ON No
OFF Yes E
Operation takes less than 1 second.
Without CONSULT-III
1. Clean the air passage [portion (A) to (B)] of EVAP canister vent F
control valve using an air blower. JMBIA0169ZZ

2. Check air passage continuity and operation delay time under the
following conditions.
Check that new O-ring is installed properly. G

Condition Air passage continuity between (A) and (B)

H
12 V direct current supply between
No
terminals (1) and (2)
OFF Yes
I
Operation takes less than 1 second.
Is the inspection result normal?
YES >> INSPECTION END J
NO >> Replace EVAP canister vent control valve

Revision: 2008 October EC-295 2009 Murano

 P0448 EVAP CANISTER VENT CONTROL VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
P0448 EVAP CANISTER VENT CONTROL VALVE
Description INFOID:0000000003591645

The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows EVAP
PBIB1263E
Control System diagnosis.
DTC Logic INFOID:0000000003388068

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
EVAP canister vent control valve
EVAP control system pressure sensor
EVAP canister vent con- EVAP canister vent control valve remains and the circuit
P0448
trol valve close closed under specified driving conditions. Blocked rubber tube to EVAP canister
vent control valve
EVAP canister is saturated with water

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON and wait at least 5 seconds.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
4. Start engine and let it idle for at least 1 minute.
5. Repeat next procedures 3 times.
- Increase the engine speed up to 3,000 to 3,500 rpm and keep it for 2 minutes and 50 seconds to 3 min-
utes.
Never exceed 3 minutes.
- Fully released accelerator pedal and keep engine idle for about 5 seconds.
6. Repeat next procedure 20 times.
- Quickly increase the engine speed up to 4,000 to 4,500 rpm or more and keep it for 25 to 30 seconds.

Revision: 2008 October EC-296 2009 Murano

 P0448 EVAP CANISTER VENT CONTROL VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
- Fully released accelerator pedal and keep engine idle for at least 35 seconds.
A

EC

PBIB0972E

7. Check 1st trip DTC. D

Is 1st trip DTC detected?
YES >> Go to EC-297, "Diagnosis Procedure".
NO >> INSPECTION END E
Diagnosis Procedure INFOID:0000000003388069

1.CHECK RUBBER TUBE F

1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EVAP canister vent control valve.
3. Check the rubber tube for clogging. G
Is the inspection result normal?
YES >> GO TO 2.
NO >> Clean rubber tube using an air blower. H

2.CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to EC-298, "Component Inspection". I
Is he inspection result normal?
YES >> GO TO 3.
NO >> Replace EVAP canister vent control valve. J
3.CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
K
attached.
2. Check if water will drain from the EVAP canister.
Does water drain from the EVAP canister?
L
YES >> GO TO 4.
NO >> GO TO 6.

N
JMBIA1134GB

4.CHECK EVAP CANISTER O

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb). P
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
EVAP canister for damage

Revision: 2008 October EC-297 2009 Murano

 P0448 EVAP CANISTER VENT CONTROL VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]
EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister.

6.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check that water is not inside connectors.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace EVAP control system pressure sensor.
7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-302, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace EVAP control system pressure sensor.
8.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003733511

1.CHECK EVAP CANISTER VENT CONTROL VALVE-I

1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion (A) of EVAP canister vent control valve for rust.
Is it rusted?
YES >> Replace EVAP canister vent control valve.
NO >> GO TO 2.

JMBIA0168ZZ

2.CHECK EVAP CANISTER VENT CONTROL VALVE-II

With CONSULT-III
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform VENT CONTROL/V in ACTIVE TEST mode.
4. Check air passage continuity and operation delay time.
Check that new O-ring is installed properly.

Condition VENT CONTROL/V Air passage continuity between (A) and (B)
ON Not existed
OFF Existed
Operation takes less than 1 second.
Without CONSULT-III
1. Disconnect EVAP canister vent control valve harness connector.
2. Check air passage continuity and operation delay time under the JMBIA0169ZZ

following conditions.
Check that new O-ring is installed properly.

Revision: 2008 October EC-298 2009 Murano

 P0448 EVAP CANISTER VENT CONTROL VALVE
< COMPONENT DIAGNOSIS > [VQ35DE]

Condition Air passage continuity between (A) and (B) A

12 V direct current supply between
Not existed
terminals 1 and 2
OFF Existed EC
Operation takes less than 1 second.
Is the inspection result normal? C
YES >> INSPECTION END
NO >> GO TO 3.
3.CHECK EVAP CANISTER VENT CONTROL VALVE-III D
With CONSULT-III
1. Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
2. Perform VENT CONTROL/V in ACTIVE TEST mode. E
3. Check air passage continuity and operation delay time.
Check that new O-ring is installed properly.
F
Condition VENT CONTROL/V Air passage continuity between (A) and (B)
ON No
OFF Yes G
Operation takes less than 1 second.
Without CONSULT-III
1. Clean the air passage [portion (A) to (B)] of EVAP canister vent H
control valve using an air blower. JMBIA0169ZZ

2. Check air passage continuity and operation delay time under the
following conditions. I
Check that new O-ring is installed properly.

Condition Air passage continuity between (A) and (B) J

12 V direct current supply between
No
terminals (1) and (2)
OFF Yes K
Operation takes less than 1 second.
Is the inspection result normal?
L
YES >> INSPECTION END
NO >> Replace EVAP canister vent control valve

Revision: 2008 October EC-299 2009 Murano

 P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Description INFOID:0000000003388071

The EVAP control system pressure sensor detects pressure in the

purge line. The sensor output voltage to the ECM increases as pres-
sure increases.

PBIB3370E

DTC Logic INFOID:0000000003388072

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
(EVAP control system pressure sensor
circuit is shorted.)
[CKP sensor (POS) circuit is shorted.]
EVAP control system (APP sensor 2 circuit is shorted.)
ECM detects a sloshing signal from the EVAP
P0451 pressure sensor perfor- (Refrigerant pressure sensor circuit is
control system pressure sensor
mance shorted.)
EVAP control system pressure sensor
Crankshaft position sensor (POS)
Accelerator pedal position sensor
Refrigerant pressure sensor

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait at least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-300, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388073

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?

Revision: 2008 October EC-300 2009 Murano

 P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 2.
NO >> Repair or replace ground connection. A
2.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Disconnect EVAP control system pressure sensor harness connector.
EC
2. Check that water is not inside connectors.
Is the inspection result normal?
YES >> GO TO 3.
C
NO >> Repair or replace harness connector.
3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ON. D
2. Check the voltage between EVAP control system pressure sensor harness connector and ground.

EVAP control system pressure sensor E

Ground Voltage (V)
Connector Terminal
B17 3 Ground Approx. 5
F
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 4.
G
4.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
H
ECM Sensor
Connector Terminal Name Connector Terminal
I
72 Refrigerant pressure sensor E300 1
F8
76 CKP sensor (POS) F20 1
87 APP sensor E110 5 J
E16
91 EVAP control system pressure sensor B17 3
Is the inspection result normal?
K
YES >> GO TO 5.
NO >> Repair short to ground or short to power in harness or connectors.
5.CHECK COMPONENTS L
Check the following.
Crankshaft position sensor (POS) (Refer to EC-263, "Component Inspection".)
Refrigerant pressure sensor (Refer to EC-463, "Diagnosis Procedure".) M
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace malfunctioning components. N
6.CHECK APP SENSOR
Refer to EC-415, "Component Inspection".
O
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 7.
P
7.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Go to EC-415, "Special Repair Requirement".

>> INSPECTION END

8.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Revision: 2008 October EC-301 2009 Murano
 P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Refer to EC-302, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace EVAP control system pressure sensor.
9.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003388078

1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

1. Turn ignition switch OFF.
2. Remove EVAP control system pressure sensor with its harness connector.
Always replace O-ring with a new one.
3. Install a vacuum pump to EVAP control system pressure sensor.
4. Turn ignition switch ON and check output voltage between ECM terminals under the following conditions.

ECM
Applied vacuum kPa
+ Voltage
Connector (kg/cm2, psi)
Terminal Terminal

86 Not applied 1.8 - 4.8 V

96
E16 (EVAP control system 2.1 to 2.5 V lower than
(Sensor ground) -26.7 (-0.272, -3.87)
pressure sensor signal) above value
CAUTION:
Always calibrate the vacuum pump gauge when using it.
Never apply below -93.3 kPa (-0.952 kg/cm2, -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm2,
14.69 psi).
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace EVAP control system pressure sensor

Revision: 2008 October EC-302 2009 Murano

 P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
A
Description INFOID:0000000003591654

The EVAP control system pressure sensor detects pressure in the EC

purge line. The sensor output voltage to the ECM increases as pres-
sure increases.
C

PBIB3370E E
DTC Logic INFOID:0000000003388076

DTC DETECTION LOGIC F

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
G
Harness or connectors
(The sensor circuit is open or shorted.)
[CKP sensor (POS) circuit is shorted.]
(APP sensor 2 circuit is shorted.) H
EVAP control system
An excessively low voltage from the sensor is (Refrigerant pressure sensor circuit is
P0452 pressure sensor low in-
sent to ECM. shorted.)
put
EVAP control system pressure sensor
Crankshaft position sensor (POS) I
Accelerator pedal position sensor
Refrigerant pressure sensor
J
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- K
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. L
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5C (41F) or more.
M
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE N
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds. O
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
P
6. Select DATA MONITOR mode with CONSULT-III.
7. Check that FUEL T/TMP SE is more than 0C (32F).
8. Start engine and wait at least 20 seconds.
9. Check 1st trip DTC.
With GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes to ECM harness connector terminals under the following conditions.

Revision: 2008 October EC-303 2009 Murano

 P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM
+
Connector
Terminal Terminal
95 104
E16
(Fuel tank temperature sensor signal) (Sensor ground)
3. Check that the voltage is less than 4.2 V.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Turn ignition switch OFF and wait at least 10 seconds.
7. Start engine and wait at least 20 seconds.
8. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-304, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388077

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check that water is not inside connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness connector.
3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check the voltage between EVAP control system pressure sensor harness connector and ground.

EVAP control system pressure sensor

Ground Voltage (V)
Connector Terminal
B17 3 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 4.
4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.

EVAP control system pressure sensor ECM

Continuity
Connector Terminal Connector Terminal
B17 3 E16 91 Existed
Is the inspection result normal?
YES >> GO TO 6.

Revision: 2008 October EC-304 2009 Murano

 P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART A

Check the following.

Harness connectors B4, E104
EC
Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit.

C
6.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
D
ECM Sensor
Connector Terminal Name Connector Terminal
E
72 Refrigerant pressure sensor E300 1
F8
76 CKP sensor (POS) F20 1
87 APP sensor E110 5 F
E16
91 EVAP control system pressure sensor B17 3
Is the inspection result normal?
G
YES >> GO TO 7.
NO >> Repair short to ground or short to power in harness or connectors.
7.CHECK COMPONENTS H
Check the following.
Crankshaft position sensor (POS) (Refer to EC-263, "Component Inspection".)
Refrigerant pressure sensor (Refer to EC-463, "Diagnosis Procedure".) I
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace malfunctioning components. J
8.CHECK APP SENSOR
Refer to EC-415, "Component Inspection".
K
Is the inspection result normal?
YES >> GO TO 15.
NO >> GO TO 9.
L
9.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Refer to EC-415, "Special Repair Requirement". M

>> INSPECTION END

10.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND N
SHORT
1. Turn ignition switch OFF.
O
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.
P
EVAP control system pressure sensor ECM
Continuity
Connector Terminal Connector Terminal
B17 1 E16 96 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?

Revision: 2008 October EC-305 2009 Murano

 P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 12.
NO >> GO TO 11.
11.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B4, E104
Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.
12.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.

EVAP control system pressure sensor ECM

Continuity
Connector Terminal Connector Terminal
B17 2 E16 86 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 14.
NO >> GO TO 13.
13.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B4, E104
Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.
14.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-306, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 15.
NO >> Replace EVAP control system pressure sensor.
15.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003625710

1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

1. Turn ignition switch OFF.
2. Remove EVAP control system pressure sensor with its harness connector.
Always replace O-ring with a new one.
3. Install a vacuum pump to EVAP control system pressure sensor.
4. Turn ignition switch ON and check output voltage between ECM terminals under the following conditions.

Revision: 2008 October EC-306 2009 Murano

 P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
Applied vacuum kPa
+ Voltage
Connector (kg/cm2, psi)
Terminal Terminal
EC
86 Not applied 1.8 - 4.8 V
96
E16 (EVAP control system 2.1 to 2.5 V lower than
(Sensor ground) -26.7 (-0.272, -3.87)
pressure sensor signal) above value
C
CAUTION:
Always calibrate the vacuum pump gauge when using it.
Never apply below -93.3 kPa (-0.952 kg/cm2, -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm2, D
14.69 psi).
Is the inspection result normal?
YES >> INSPECTION END E
NO >> Replace EVAP control system pressure sensor

Revision: 2008 October EC-307 2009 Murano

 P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Description INFOID:0000000003591658

The EVAP control system pressure sensor detects pressure in the

purge line. The sensor output voltage to the ECM increases as pres-
sure increases.

PBIB3370E

DTC Logic INFOID:0000000003388080

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
(The sensor circuit is open or shorted.)
[CKP sensor (POS) circuit is shorted.]
(APP sensor 2 circuit is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
EVAP control system
An excessively high voltage from the sensor is EVAP control system pressure sensor
P0453 pressure sensor high in-
sent to ECM. Crankshaft position sensor (POS)
put
Accelerator pedal position sensor
Refrigerant pressure sensor
EVAP canister vent control valve
EVAP canister
Rubber hose from EVAP canister vent
control valve to vehicle frame

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5C (41F) or more.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
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. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Select DATA MONITOR mode with CONSULT-III.
7. Check that FUEL T/TMP SE is more than 0C (32F).
8. Start engine and wait at least 20 seconds.
9. Check 1st trip DTC.

Revision: 2008 October EC-308 2009 Murano

 P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
With GST
1. Start engine and warm it up to normal operating temperature. A
2. Set voltmeter probes to ECM harness connector terminals.

ECM EC
+
Connector
Terminal Terminal
C
95 104
E16
(Fuel tank temperature sensor signal) (Sensor ground)
3. Check that the voltage is less than 4.2 V. D
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Turn ignition switch OFF and wait at least 10 seconds.
7. Start engine and wait at least 20 seconds. E
8. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-309, "Diagnosis Procedure". F
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388081
G
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF. H
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2. I
NO >> Repair or replace ground connection.
2.CHECK CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector. J
2. Check that water is not inside connectors.
Is the inspection result normal?
YES >> GO TO 3. K
NO >> Repair or replace harness connector.
3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT L
1. Turn ignition switch ON.
2. Check the voltage between EVAP control system pressure sensor harness connector and ground.
M
EVAP control system pressure sensor
Ground Voltage (V)
Connector Terminal
B17 3 Ground Approx. 5 N
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 4. O

4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II

1. Turn ignition switch OFF. P
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.

Revision: 2008 October EC-309 2009 Murano

 P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

EVAP control system pressure sensor ECM

Continuity
Connector Terminal Connector Terminal
B17 3 E16 91 Existed
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B4, E104
Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit.

6.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.

ECM Sensor
Connector Terminal Name Connector Terminal
72 Refrigerant pressure sensor E300 1
F8
76 CKP sensor (POS) F20 1
87 APP sensor E110 5
E16
91 EVAP control system pressure sensor B17 3
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair short to ground or short to power in harness or connectors.
7.CHECK COMPONENTS
Check the following.
Crankshaft position sensor (POS) (Refer to EC-263, "Component Inspection".)
Refrigerant pressure sensor (Refer to EC-463, "Diagnosis Procedure".)
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace malfunctioning components.
8.CHECK APP SENSOR
Refer to EC-415, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 15.
NO >> GO TO 9.
9.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Refer to EC-415, "Special Repair Requirement".

>> INSPECTION END

10.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND
SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.

Revision: 2008 October EC-310 2009 Murano

 P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

EVAP control system pressure sensor ECM A

Continuity
Connector Terminal Connector Terminal
B17 1 E16 96 Existed
EC
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 12. C
NO >> GO TO 11.
11.DETECT MALFUNCTIONING PART
D
Check the following.
Harness connectors B4, E104
Harness for open or short between EVAP control system pressure sensor and ECM
E
>> Repair open circuit, short to ground or short to power in harness or connectors.
12.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND F
SHORT
1. Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector. G

EVAP control system pressure sensor ECM

Continuity
Connector Terminal Connector Terminal H
B17 2 E16 86 Existed
2. Also check harness for short to ground and short to power.
I
Is the inspection result normal?
YES >> GO TO 14.
NO >> GO TO 13.
J
13.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B4, E104 K
Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors. L
14.CHECK RUBBER TUBE
1. Disconnect rubber tube connected to EVAP canister vent control valve. M
2. Check the rubber tube for clogging.
Is the inspection result normal?
YES >> GO TO 15. N
NO >> Clean the rubber tube using an air blower, repair or replace rubber tube.
15.CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to EC-294, "Component Inspection". O
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace EVAP canister vent control valve. P
16.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-312, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Replace EVAP control system pressure sensor.

Revision: 2008 October EC-311 2009 Murano

 P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

17.CHECK IF EVAP CANISTER IS SATURATED WITH WATER

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
2. Check if water will drain from the EVAP canister.
Does water drain from the EVAP canister?
YES >> GO TO 18.
NO >> GO TO 20.

JMBIA1134GB

18.CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?
YES >> GO TO 20.
NO >> GO TO 19.
19.DETECT MALFUNCTIONING PART
Check the following.
EVAP canister for damage
EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister.

20.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003625711

1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

1. Turn ignition switch OFF.
2. Remove EVAP control system pressure sensor with its harness connector.
Always replace O-ring with a new one.
3. Install a vacuum pump to EVAP control system pressure sensor.
4. Turn ignition switch ON and check output voltage between ECM terminals under the following conditions.

ECM
Applied vacuum kPa
+ Voltage
Connector (kg/cm2, psi)
Terminal Terminal

86 Not applied 1.8 - 4.8 V

96
E16 (EVAP control system 2.1 to 2.5 V lower than
(Sensor ground) -26.7 (-0.272, -3.87)
pressure sensor signal) above value
CAUTION:
Always calibrate the vacuum pump gauge when using it.
Never apply below -93.3 kPa (-0.952 kg/cm2, -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm2,
14.69 psi).
Is the inspection result normal?

Revision: 2008 October EC-312 2009 Murano

 P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> INSPECTION END
NO >> Replace EVAP control system pressure sensor A

EC

Revision: 2008 October EC-313 2009 Murano

 P0455 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
P0455 EVAP CONTROL SYSTEM
DTC Logic INFOID:0000000003388083

DTC DETECTION LOGIC

This diagnosis detects a very large leakage (fuel filler cap fell off etc.) in EVAP system between the fuel tank
and EVAP canister purge volume control solenoid valve.

PBIB1026E

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Fuel filler cap remains open or does not
close.
Incorrect fuel tank vacuum relief valve
Incorrect fuel filler cap used
Foreign matter caught in fuel filler cap.
Leakage is in line between intake mani-
fold and EVAP canister purge volume
control solenoid valve.
Foreign matter caught in EVAP canister
vent control valve.
EVAP canister or fuel tank leakage
EVAP control system has a very large leakage EVAP purge line (pipe and rubber tube)
EVAP control system
P0455 such as fuel filler cap fell off, EVAP control sys- leakage
gross leakage detected
tem does not operate properly. EVAP purge line rubber tube bent.
Loose or disconnected rubber tube
EVAP canister vent control valve and the
circuit
EVAP canister purge volume control so-
lenoid valve and the circuit
Fuel tank temperature sensor
O-ring of EVAP canister vent control
valve is missing or damaged.
EVAP control system pressure sensor
Refueling EVAP vapor cut valve
ORVR system leakage
CAUTION:
Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may illuminate.
If the fuel filler cap is not tightened properly, the MIL may illuminate.
Use only a genuine NISSAN rubber tube as a replacement.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
CAUTION:

Revision: 2008 October EC-314 2009 Murano

 P0455 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
Never remove fuel filler cap during the DTC Confirmation Procedure.
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- A
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
EC
3. Turn ignition switch OFF and wait at least 10 seconds.
Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
TESTING CONDITION:
Perform DTC WORK SUPPORT when the fuel level is between 1/4 and 3/4 full, and vehicle is placed C
on flat level surface.
Open engine hood before conducting the following procedures.
Will CONSULT-III be used? D
YES >> GO TO 2.
NO >> GO TO 4.
2.PERFORM DTC CONFIRMATION PROCEDURE E

With CONSULT-III
1. Tighten fuel filler cap securely until ratcheting sound is heard.
2. Turn ignition switch ON. F
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
5. Check that the following conditions are met. G
COOLAN TEMP/S: 0 - 70C (32 - 158F)
INT/A TEMP SE: 0 - 60C (32 - 140F)
6. Select EVP SML LEAK P0442/P1442 of EVAPORATIVE SYSTEM in DTC WORK SUPPORT mode
with CONSULT-III. H
Follow the instructions displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-III screen, go to I
EC-12, "BASIC INSPECTION : Special Repair Requirement".
Which is displayed on CONSULT-III screen?
OK >> INSPECTION END J
NG >> GO TO 3.
3.CHECK DTC
K
Check DTC.
Which DTC is detected?
P0455 >> Go to EC-316, "Diagnosis Procedure". L
P0442 >> Go to EC-279, "Diagnosis Procedure".
4.PERFORM DTC CONFIRMATION PROCEDURE
With GST M
NOTE:
Be sure to read the explanation of DRIVING PATTERN in EC-524, "How to Set SRT Code" before driving
vehicle. N
1. Start engine.
2. Drive vehicle according to DRIVING PATTERN.
3. Stop vehicle.
4. Turn ignition switch OFF and wait at least 10 seconds. O
5. Turn ignition switch ON.
6. Turn ignition switch OFF and wait at least 10 seconds.
7. Turn ignition switch ON. P
8. Check 1st trip DTC.
Is 1st trip DTC detected?
YES-1 >> P0455: Go to EC-316, "Diagnosis Procedure".
YES-2 >> P0442: Go to EC-279, "Diagnosis Procedure".
YES-3 >> P0441: Go to EC-275, "Diagnosis Procedure".
NO >> INSPECTION END

Revision: 2008 October EC-315 2009 Murano

 P0455 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
Diagnosis Procedure INFOID:0000000003388084

1.CHECK FUEL FILLER CAP DESIGN

1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace with genuine NISSAN fuel filler cap.

SEF915U

2.CHECK FUEL FILLER CAP INSTALLATION

Check that the cap is tightened properly by rotating the cap clockwise.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Retighten until
ratcheting sound is heard.
3.CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK FUEL TANK VACUUM RELIEF VALVE
Refer to EC-318, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace fuel filler cap with a genuine one.
5.CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or
disconnection.
Refer to EC-77, "System Diagram".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or reconnect the hose.
6.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 7.
7.CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
EVAP canister vent control valve is installed properly.
Refer to EC-549, "Removal and Installation".
EVAP canister vent control valve.
Refer to EC-294, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace EVAP canister vent control valve and O-ring.

Revision: 2008 October EC-316 2009 Murano

 P0455 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]

8.CHECK FOR EVAP LEAKAGE A

Refer to EC-547, "Inspection".
Is there any leakage in EVAP line?
YES >> Repair or replace. EC
NO-1 >> With CONSULT-III: GO TO 9.
NO-2 >> Without CONSULT-III: GO TO 10.
9.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION C
With CONSULT-III
1. Disconnect vacuum hose from EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine. D
3. Perform PURG VOL C/V in ACTIVE TEST mode.
4. Touch Qu on CONSULT-III screen to increase PURG VOL C/V opening to 100%.
5. Check vacuum hose for vacuum. E

Vacuum should exist.

Is the inspection result normal? F
YES >> GO TO 12.
NO >> GO TO 11.
10.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION G

Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
H
2. Stop engine.
3. Disconnect vacuum hose from EVAP canister purge volume control solenoid valve at EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm. I

Vacuum should exist.

Is the inspection result normal? J
YES >> GO TO 13.
NO >> GO TO 11.
11.CHECK VACUUM HOSE K

Check vacuum hoses for clogging or disconnection. Refer to EC-77, "System Diagram".
Is the inspection result normal? L
YES-1 >> With CONSULT-III: GO TO 12.
YES-2 >> Without CONSULT-III: GO TO 13.
NO >> Repair or reconnect the hose. M
12.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
1. Start engine. N
2. Perform PURG VOL C/V in ACTIVE TEST mode with CONSULT-III. Check that engine speed varies
according to the valve opening.
Does engine speed vary according to the valve opening? O
YES >> GO TO 14.
NO >> GO TO 13.
13.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE P

Refer to EC-287, "Component Inspection".

Is the inspection result normal?
YES >> GO TO 14.
NO >> Replace EVAP canister purge volume control solenoid valve.
14.CHECK FUEL TANK TEMPERATURE SENSOR
Revision: 2008 October EC-317 2009 Murano
 P0455 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
Refer to EC-238, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 15.
NO >> Replace fuel level sensor unit.
15.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-302, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace EVAP control system pressure sensor.
16.CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper
connection. For location, refer to EC-457, "Description".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Repair or replace hoses and tubes.
17.CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and
improper connection.
Is the inspection result normal?
YES >> GO TO 18.
NO >> Repair or replace hose, tube or filler neck tube.
18.CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to EC-460, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 19.
NO >> Replace refueling EVAP vapor cut valve with fuel tank.
19.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003591639

1.CHECK FUEL FILLER CAP

1. Turn ignition switch OFF.
2. Remove fuel filler cap.
3. Wipe clean valve housing.

SEF445Y

4. Install fuel filler cap adapter (commercial service tool) to fuel filler cap.

Revision: 2008 October EC-318 2009 Murano

 P0455 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
5. Check valve opening pressure and vacuum.
A
Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm2, 2.22 -
2.90 psi)
Vacuum: EC
6.0 to 3.3 kPa (0.061 to 0.034 kg/cm2,
0.87 to 0.48 psi)
Is the inspection result normal? C
YES >> INSPECTION END
NO >> GO TO 2.
SEF943S

2.REPLACE FUEL FILLER CAP D

Replace fuel filler cap.

CAUTION:
E
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may
illuminate.

F
>> INSPECTION END

Revision: 2008 October EC-319 2009 Murano

 P0456 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
P0456 EVAP CONTROL SYSTEM
DTC Logic INFOID:0000000003388086

DTC DETECTION LOGIC

NOTE:
If DTC P0456 is displayed with DTC P0442, first perform the trouble diagnosis for DTC P0456.
This diagnosis detects very small leakage in the EVAP line between fuel tank and EVAP canister purge vol-
ume control solenoid valve, using the negative pressure.
If ECM judges a leakage which corresponds to a very small leakage, the very small leakage P0456 will be
detected.
If ECM judges a leakage equivalent to a small leakage, EVAP small leakage P0442 will be detected.
If ECM judges that there are no leakage, the diagnosis will be OK.

PBIB1026E

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Incorrect fuel tank vacuum relief valve
Incorrect fuel filler cap used
Fuel filler cap remains open or does not close.
Foreign matter caught in fuel filler cap.
Leakage is in line between intake manifold and
EVAP canister purge volume control solenoid
valve.
Foreign matter caught in EVAP canister vent con-
trol valve.
EVAP canister or fuel tank leakage
EVAP purge line (pipe and rubber tube) leakage
Evaporative emission EVAP system has a very small leak- EVAP purge line rubber tube bent
control system very age. Loose or disconnected rubber tube
P0456
small leakage (negative EVAP system does not operate prop- EVAP canister vent control valve and the circuit
pressure check) erly. EVAP canister purge volume control solenoid
valve and the circuit
Fuel tank temperature sensor
O-ring of EVAP canister vent control valve is miss-
ing or damaged
EVAP canister is saturated with water
EVAP control system pressure sensor
Refueling EVAP vapor cut valve
ORVR system leakage
Fuel level sensor and the circuit
Foreign matter caught in EVAP canister purge vol-
ume control solenoid valve
CAUTION:

Revision: 2008 October EC-320 2009 Murano

 P0456 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may illuminate. A
If the fuel filler cap is not tightened properly, the MIL may illuminate.
Use only a genuine NISSAN rubber tube as a replacement.
DTC CONFIRMATION PROCEDURE EC
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- C
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. D
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 4. E

2.PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always turn ignition switch OFF and F
wait at least 10 seconds before conducting the next test.
NOTE:
After repair, make sure that the hoses and clips are installed properly.
Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve prop- G
erly.
TESTING CONDITION:
Open engine hood before conducting the following procedure. H
If any of following conditions are met just before the DTC CONFIRMATION PROCEDURE, leave the
vehicle for more than 1 hour.
- Fuel filler cap is removed.
I
- Fuel is refilled or drained.
- EVAP component part/parts is/are removed.
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
J
>> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE K
With CONSULT-III
1. Turn ignition switch ON and select DATA MONITOR mode with CONSULT-III.
2. Check that the following conditions are met. L
FUEL LEVEL SE: 0.25 - 1.4 V
COOLAN TEMP/S: 0 - 32C (32 - 90F)
FUEL T/TMP SE: 0 - 35C (32 - 95F)
INT A/TEMP SE: More than 0C (32F) M
If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle), or refill/drain fuel
until the output voltage of the FUEL LEVEL SE meets within the range above and leave the vehicle for
more than 1 hour. Then start from step 1. N
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Select EVP V/S LEAK P0456/P1456 of EVAPORATIVE SYSTEM in DTC WORK SUPPORT mode
with CONSULT-III. O
Follow the instructions displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go to P
EC-12, "BASIC INSPECTION : Special Repair Requirement".
Which is displayed on CONSULT-III?
OK >> INSPECTION END
NG >> Go to EC-322, "Diagnosis Procedure".
4.PERFORM COMPONENT FUNCTION CHECK
Perform Component Function Check. Refer to EC-322, "Component Function Check".

Revision: 2008 October EC-321 2009 Murano

 P0456 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
NOTE:
Use Component Function Check to check the overall function of the EVAP very small leakage function. During
this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-322, "Diagnosis Procedure".
Component Function Check INFOID:0000000003733525

1.PERFORM COMPONENT FUNCTION CHECK

With GST
CAUTION:
Never use compressed air, doing so may damage the EVAP system.
Never start engine.
Never exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi).
1. Attach the EVAP service port adapter (commercial service tool) securely to the EVAP service port.
2. Set the pressure pump and a hose.
3. Also set a vacuum gauge via 3-way connector and a hose.
4. Turn ignition switch ON.
5. Connect GST and select Service $08.
6. Using Service $08 control the EVAP canister vent control valve
(close).
7. Apply pressure and make sure the following conditions are sat-
isfied.
Pressure to be applied: 2.7 kPa (0.028 kg/cm2, 0.39 psi)
Time to be waited after the pressure drawn in to the EVAP
system and the pressure to be dropped: 60 seconds and SEF462UI
the pressure should not be dropped more than 0.4 kPa
(0.004 kg/cm2, 0.06 psi).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to EC-322, "Diagnosis Procedure".
2.RELEASE PRESSURE
1. Disconnect GST.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for 90 seconds.
5. Keep engine speed at 2,000 rpm for 30 seconds.
6. Turn ignition switch OFF.
NOTE:
For more information, refer to GST Instruction Manual.

>> INSPECTION END

Diagnosis Procedure INFOID:0000000003388088

1.CHECK FUEL FILLER CAP DESIGN

1. Turn ignition switch OFF.

Revision: 2008 October EC-322 2009 Murano

 P0456 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Check for genuine NISSAN fuel filler cap design.
Is the inspection result normal? A
YES >> GO TO 2.
NO >> Replace with genuine NISSAN fuel filler cap.
EC

SEF915U

2.CHECK FUEL FILLER CAP INSTALLATION D

Check that the cap is tightened properly by rotating the cap clockwise.
Is the inspection result normal? E
YES >> GO TO 3.
NO >> Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Retighten until
ratcheting sound is heard.
F
3.CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
Is the inspection result normal? G
YES >> GO TO 5.
NO >> GO TO 4.
H
4.CHECK FUEL TANK VACUUM RELIEF VALVE
Refer to EC-326, "Component Inspection".
Is the inspection result normal? I
YES >> GO TO 5.
NO >> Replace fuel filler cap with a genuine one.
5.CHECK FOR EVAP LEAKAGE J

Refer to EC-547, "Inspection".

Is there any leakage in EVAP line? K
YES >> Repair or replace malfunctioning part.
NO >> GO TO 6.
6.CHECK EVAP CANISTER VENT CONTROL VALVE L
Check the following.
EVAP canister vent control valve is installed properly.
Refer to EC-549, "Removal and Installation". M
EVAP canister vent control valve.
Refer to EC-294, "Component Inspection".
Is the inspection result normal? N
YES >> GO TO 7.
NO >> Repair or replace EVAP canister vent control valve and O-ring.
7.CHECK IF EVAP CANISTER IS SATURATED WITH WATER O

Revision: 2008 October EC-323 2009 Murano

 P0456 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
Remove EVAP canister with EVAP canister vent control valve and
EVAP control system pressure sensor attached.
Does water drain from the EVAP canister?
YES >> GO TO 8.
NO-1 >> With CONSULT-III: GO TO 10.
NO-2 >> Without CONSULT-III: GO TO 11.

JMBIA1134GB

8.CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 10.
YES-2 >> Without CONSULT-III: GO TO 11.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
EVAP canister for damage
EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister.

10.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Disconnect vacuum hose connected to EVAP service port and EVAP canister purge volume control sole-
noid valve from EVAP service port.
2. Start engine.
3. Perform PURG VOL C/V in ACTIVE TEST mode.
4. Touch Qu on CONSULT-III screen to increase PURG VOL C/V opening to 100%.
5. Check vacuum hose for vacuum.

Vacuum should exist.

Is the inspection result normal?
YES >> GO TO 13.
NO >> GO TO 12.
11.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose connected to EVAP service port and EVAP canister purge volume control sole-
noid valve from EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.

Vacuum should exist.

Is the inspection result normal?
YES >> GO TO 14.
NO >> GO TO 12.
12.CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to EC-77, "System Diagram".

Revision: 2008 October EC-324 2009 Murano

 P0456 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the inspection result normal?
YES >> GO TO 13. A
NO >> Repair or reconnect the hose.
13.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC
Refer to EC-287, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 14. C
NO >> Replace EVAP canister purge volume control solenoid valve.
14.CHECK FUEL TANK TEMPERATURE SENSOR
Refer to EC-238, "Component Inspection". D
Is the inspection result normal?
YES >> GO TO 15.
NO >> Replace fuel level sensor unit. E

15.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to EC-302, "Component Inspection". F
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace EVAP control system pressure sensor. G
16.CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection. H
Refer to EC-77, "System Diagram".
Is the inspection result normal?
YES >> GO TO 17. I
NO >> Repair or reconnect the hose.
17.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower. J

>> GO TO 18.
K
18.CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper
connection. For location, refer to EC-457, "Description". L
Is the inspection result normal?
YES >> GO TO 19.
NO >> Repair or replace hoses and tubes. M
19.CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and
improper connection. N
Is the inspection result normal?
YES >> GO TO 20.
NO >> Repair or replace hose, tube or filler neck tube. O

20.CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to EC-460, "Component Inspection". P
Is the inspection result normal?
YES >> GO TO 21.
NO >> Replace refueling EVAP vapor cut valve with fuel tank.
21.CHECK FUEL LEVEL SENSOR
Refer to MWI-47, "Component Inspection".
Is the inspection result normal?

Revision: 2008 October EC-325 2009 Murano

 P0456 EVAP CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 22.
NO >> Replace fuel level sensor unit.
22.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003591640

1.CHECK FUEL FILLER CAP

1. Turn ignition switch OFF.
2. Remove fuel filler cap.
3. Wipe clean valve housing.

SEF445Y

4. Install fuel filler cap adapter (commercial service tool) to fuel filler cap.
5. Check valve opening pressure and vacuum.

Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm2, 2.22 -

2.90 psi)
Vacuum: 6.0 to 3.3 kPa (0.061 to 0.034 kg/cm2,
0.87 to 0.48 psi)
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
SEF943S

2.REPLACE FUEL FILLER CAP

Replace fuel filler cap.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may
illuminate.

>> INSPECTION END

Revision: 2008 October EC-326 2009 Murano

 P0460 FUEL LEVEL SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0460 FUEL LEVEL SENSOR
A
Description INFOID:0000000003388090

The fuel level sensor is mounted in the fuel level sensor unit. EC
The sensor detects a fuel level in the fuel tank and transmits a signal to the combination meter. The combina-
tion meter sends the fuel level sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output volt-
age changes depending on the movement of the fuel mechanical float. C

DTC Logic INFOID:0000000003388091

D
DTC DETECTION LOGIC
NOTE:
If DTC P0460 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
E
If DTC P0460 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
to EC-346, "DTC Logic".
When the vehicle is parked, the fuel level in the fuel tank is naturally stable. It means that output signal of the
fuel level sensor does not change. If ECM senses sloshing signal from the sensor, fuel level sensor malfunc- F
tion is detected.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause G
Harness or connectors
(The CAN communication line is open or
Even though the vehicle is parked, a signal be- shorted) H
Fuel level sensor circuit
P0460 ing varied is sent from the fuel level sensor to Harness or connectors
noise
ECM. (The sensor circuit is open or shorted)
Combination meter
Fuel level sensor I
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING J
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. K
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
L
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
M
1. Start engine and wait maximum of 2 consecutive minutes.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
N
YES >> Go to EC-327, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388092 O

1.CHECK COMBINATION METER FUNCTION

Refer to MWI-34, "CONSULT-III Function (METER/M&A)". P
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to MWI-46, "Diagnosis Procedure".
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

Revision: 2008 October EC-327 2009 Murano

 P0460 FUEL LEVEL SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

>> INSPECTION END

Revision: 2008 October EC-328 2009 Murano

 P0461 FUEL LEVEL SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0461 FUEL LEVEL SENSOR
A
Description INFOID:0000000003591659

The fuel level sensor is mounted in the fuel level sensor unit. EC
The sensor detects a fuel level in the fuel tank and transmits a signal to the combination meter. The combina-
tion meter sends the fuel level sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output volt-
age changes depending on the movement of the fuel mechanical float. C

DTC Logic INFOID:0000000003388094

D
DTC DETECTION LOGIC
NOTE:
If DTC P0461 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
E
If DTC P0461 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
to EC-346, "DTC Logic".
Driving long distances naturally affect fuel gauge level.
This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has F
been driven.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause G
Harness or connectors
(The CAN communication line is open or
The output signal of the fuel level sensor does
shorted) H
Fuel level sensor circuit not change within the specified range even
P0461 Harness or connectors
range/performance though the vehicle has been driven a long dis-
(The sensor circuit is open or shorted)
tance.
Combination meter
Fuel level sensor I
DTC CONFIRMATION PROCEDURE
J
1.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-329, "Component Function Check".
Use component function check to check the overall function of the fuel level sensor. During this check, a 1st K
trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END L
NO >> Go to EC-330, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388095
M
1.PRECONDITIONING
WARNING: N
When performing the following procedure, always observe the handling of the fuel. Refer to FL-12,
"Removal and Installation".
TESTING CONDITION:
Before starting component function check, preparation of draining fuel and refilling fuel is required. O
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3. P

2.PERFORM COMPONENT FUNCTION CHECK

With CONSULT-III
NOTE:
Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/
8 Imp gal) in advance.
1. Prepare a fuel container and a spare hose.

Revision: 2008 October EC-329 2009 Murano

 P0461 FUEL LEVEL SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
2. Release fuel pressure from fuel line, refer to EC-547, "Inspection".
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.
6. Select FUEL LEVEL SE in DATA MONITOR mode with CONSULT-III.
7. Check FUEL LEVEL SE output voltage and note it.
8. Select FUEL PUMP RELAY in ACTIVE TEST mode with CONSULT-III.
9. Touch ON and drain fuel approximately 30 (7-7/8 US gal, 6-5/8 Imp gal) and stop it.
10. Check FUEL LEVEL SE output voltage and note it.
11. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
12. Check FUEL LEVEL SE output voltage and note it.
13. Confirm whether the voltage changes more than 0.03 V during step 7 to 10 and 10 to 12.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-330, "Diagnosis Procedure".
3.PERFORM COMPONENT FUNCTION CHECK
Without CONSULT-III
NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/8
Imp gal) in advance.
1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line. Refer to EC-547, "Inspection".
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch ON.
6. Drain fuel by 30 (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
7. Confirm that the fuel gauge indication varies.
8. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
9. Confirm that the fuel gauge indication varies.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-330, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003591660

1.CHECK COMBINATION METER FUNCTION

Refer to MWI-34, "CONSULT-III Function (METER/M&A)".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to MWI-46, "Diagnosis Procedure".
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Revision: 2008 October EC-330 2009 Murano

 P0462, P0463 FUEL LEVEL SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0462, P0463 FUEL LEVEL SENSOR
A
Description INFOID:0000000003591661

The fuel level sensor is mounted in the fuel level sensor unit. EC
The sensor detects a fuel level in the fuel tank and transmits a signal to the combination meter. The combina-
tion meter sends the fuel level sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output volt-
age changes depending on the movement of the fuel mechanical float. C

DTC Logic INFOID:0000000003388098

D
DTC DETECTION LOGIC
NOTE:
If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC
E
UXXXX.
If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC
P0607.Refer to EC-346, "DTC Logic".
F
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Fuel level sensor circuit An excessively low voltage from the sensor is Harness or connectors
P0462 G
low input sent to ECM. (The CAN communication line is open or
shorted)
Harness or connectors
Fuel level sensor circuit An excessively high voltage from the sensor is (The sensor circuit is open or shorted)
P0463 H
high input sent to ECM. Combination meter
Fuel level sensor

DTC CONFIRMATION PROCEDURE I

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test. J
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. K
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at ignition
switch ON.
L

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE M
1. Turn ignition switch ON and wait at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected? N
YES >> Go to EC-331, "Diagnosis Procedure".
NO >> INSPECTION END
O
Diagnosis Procedure INFOID:0000000003591662

1.CHECK COMBINATION METER FUNCTION P

Refer to MWI-34, "CONSULT-III Function (METER/M&A)".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to MWI-46, "Diagnosis Procedure".
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

Revision: 2008 October EC-331 2009 Murano

 P0462, P0463 FUEL LEVEL SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

>> INSPECTION END

Revision: 2008 October EC-332 2009 Murano

 P0500 VSS
< COMPONENT DIAGNOSIS > [VQ35DE]
P0500 VSS
A
Description INFOID:0000000003388100

The vehicle speed signal is sent to the combination meter from the ABS actuator and electric unit (control EC
unit) via the CAN communication line. The combination meter then sends a signal to the ECM via the CAN
communication line.
DTC Logic INFOID:0000000003388101 C

DTC DETECTION LOGIC

NOTE: D
If DTC P0500 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
If DTC P0500 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
to EC-346, "DTC Logic".
E

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors F
(The CAN communication line is open or short-
ed)
The vehicle speed signal sent to ECM is Harness or connectors
P0500 Vehicle speed sensor almost 0 km/h (0 MPH) even when vehicle (The vehicle speed signal circuit is open or G
is being driven. shorted)
Wheel sensor
Combination meter
ABS actuator and electric unit (control unit) H

DTC CONFIRMATION PROCEDURE

1.INSPECTION START I
Will CONSULT-III be used?
Will CONSULT-III be used?
J
YES >> GO TO 2.
NO >> GO TO 5.
2.PRECONDITIONING K
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. L
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
M
>> GO TO 3.
3.CHECK VEHICLE SPEED SIGNAL
NOTE: N
This procedure 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-III O
1. Start engine (VDC switch OFF).
2. Read VHCL SPEED SE in DATA MONITOR mode with CONSULT-III. The vehicle speed on CON-
SULT-III should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
P
Is the inspection result normal?
YES >> GO TO 4.
NO >> Go to EC-334, "Diagnosis Procedure".
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Select DATA MONITOR mode with CONSULT-III.
2. Warm engine up to normal operating temperature.

Revision: 2008 October EC-333 2009 Murano

 P0500 VSS
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Maintain the following conditions for at least 50 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.

ENG SPEED 1,400 - 6,000 rpm

COOLAN TEMP/S More than 70C (158F)
B/FUEL SCHDL 5.5 - 31.8 msec
Selector lever Except P or N position
PW/ST SIGNAL OFF
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-334, "Diagnosis Procedure".
NO >> INSPECTION END
5.PERFORM COMPONENT FUNCTION CHECK
Perform Component Function Check. Refer to EC-334, "Component Function Check".
Use Component Function Check to check the overall function of the vehicle speed signal circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-334, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388102

1.PERFORM COMPONENT FUNCTION CHECK

With GST
1. Lift up drive wheels.
2. Start engine.
3. Read vehicle speed signal in Service $01 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.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-334, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388103

1.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Refer to BRC-29, "CONSULT-III Function".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace malfunctioning part.
2.CHECK COMBINATION METER FUNCTION
Refer to MWI-34, "CONSULT-III Function (METER/M&A)".

>> INSPECTION END

Revision: 2008 October EC-334 2009 Murano

 P0506 ISC SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
P0506 ISC SYSTEM
A
Description INFOID:0000000003388104

The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let EC
into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value C
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration and engine load (air conditioner, power steering and cooling fan D
operation, etc.).
DTC Logic INFOID:0000000003388105

E
DTC DETECTION LOGIC
NOTE:
If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC. F

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Idle speed control sys- G
The idle speed is less than the target idle speed Electric throttle control actuator
P0506 tem RPM lower than ex-
by 100 rpm or more. Intake air leakage
pected
H
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- I
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. J
3. Turn ignition switch OFF and wait at least 10 seconds.
If the target idle speed is out of the specified value, perform EC-17, "IDLE AIR VOLUME LEARNING :
Special Repair Requirement", before conducting DTC CONFIRMATION PROCEDURE.
TESTING CONDITION: K
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
Always perform the test at a temperature above 10C(14F).
L
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE M
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. Turn ignition switch OFF and wait at least 10 seconds. N
5. Restart engine and run it for at least 1 minute at idle speed.
6. Check 1st trip DTC.
Is 1st trip DTC detected? O
YES >> Go to EC-335, "Diagnosis Procedure".
NO >> INSPECTION END
P
Diagnosis Procedure INFOID:0000000003388106

1.CHECK INTAKE AIR LEAKAGE

1. Start engine and let it idle.
2. Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?

Revision: 2008 October EC-335 2009 Murano

 P0506 ISC SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> Discover air leakage location and repair.
NO >> GO TO 2.
2.REPLACE ECM
1. Stop engine.
2. Replace ECM.
3. Go to EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".

>> INSPECTION END

Revision: 2008 October EC-336 2009 Murano

 P0507 ISC SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
P0507 ISC SYSTEM
A
Description INFOID:0000000003591663

The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let EC
into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value C
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration and engine load (air conditioner, power steering and cooling fan D
operation, etc.).
DTC Logic INFOID:0000000003388108

E
DTC DETECTION LOGIC
NOTE:
If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for the other DTC. F

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Idle speed control sys- Electric throttle control actuator G
The idle speed is more than the target idle
P0507 tem RPM higher than Intake air leakage
speed by 200 rpm or more.
expected PCV system
H
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- I
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. J
3. Turn ignition switch OFF and wait at least 10 seconds.
If the target idle speed is out of the specified value, perform EC-17, "IDLE AIR VOLUME LEARNING :
Special Repair Requirement", before conducting DTC Confirmation Procedure.
TESTING CONDITION: K
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
Always perform the test at a temperature above 10C(14F).
L
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE M
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. Turn ignition switch OFF and wait at least 10 seconds. N
5. Restart engine and run it for at least 1 minute at idle speed.
6. Check 1st trip DTC.
Is 1st trip DTC detected? O
YES >> Go to EC-337, "Diagnosis Procedure".
NO >> INSPECTION END
P
Diagnosis Procedure INFOID:0000000003388109

1.CHECK PCV HOSE CONNECTION

Confirm that PCV hose is connected correctly.
Is the inspection result normal?
YES >> GO TO 2.

Revision: 2008 October EC-337 2009 Murano

 P0507 ISC SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Repair or replace malfunctioning part.
2.CHECK INTAKE AIR LEAKAGE
1. Start engine and let it idle.
2. Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
YES >> Discover air leakage location and repair.
NO >> GO TO 3.
3.REPLACE ECM
1. Stop engine.
2. Replace ECM.
3. Go to EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".

>> INSPECTION END

Revision: 2008 October EC-338 2009 Murano

 P0550 PSP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P0550 PSP SENSOR
A
Description INFOID:0000000003388110

Power steering pressure (PSP) sensor is installed to the power steering high-pressure tube and detects a EC
power steering load.
This sensor is a potentiometer which transforms the power steering 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. C

DTC Logic INFOID:0000000003388111

D
DTC DETECTION LOGIC
NOTE:
If DTC P0550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
E
EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
F
Harness or connectors
Power steering pressure An excessively low or high voltage from the
P0550 (The sensor circuit is open or shorted)
sensor circuit sensor is sent to ECM.
Power steering pressure sensor
G
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
H
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. I
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2. J
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 5 seconds. K
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-339, "Diagnosis Procedure". L
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388112

M
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection". N
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. O

2.CHECK PSP SENSOR POWER SUPPLY CIRCUIT

1. Disconnect power steering pressure (PSP) sensor harness connector. P
2. Turn ignition switch ON.
3. Check the voltage between PSP sensor harness connector and ground.

PSP sensor
Ground Voltage
Connector Terminal
F62 3 Ground Approx. 5 V

Revision: 2008 October EC-339 2009 Murano

 P0550 PSP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, 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 the continuity between PSP sensor harness connector and ECM harness connector.

PSP sensor ECM

Continuity
Connector Terminal Connector Terminal
F62 1 F8 48 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground short to power in harness or connectors.
4.CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between PSP sensor harness connector and ECM harness connector.

PSP sensor ECM

Continuity
Connector Terminal Connector Terminal
F62 2 F8 41 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK PSP SENSOR
Refer to EC-340, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace PSP sensor.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003388113

1.CHECK POWER STEERING PRESSURE SENSOR

1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check the voltage between ECM terminals under the following conditions.

ECM
+ Condition Voltage
Connector
Terminal Terminal
41 Steering wheel: Being turned. 0.5 - 4.5 V
48
F8 (Power steering pressure
(Sensor ground) Steering wheel: Not being turned. 0.4 - 0.8 V
sensor signal)
Is the inspection result normal?

Revision: 2008 October EC-340 2009 Murano

 P0550 PSP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> INSPECTION END
NO >> Replace power steering pressure sensor. A

EC

Revision: 2008 October EC-341 2009 Murano

 P0603 ECM POWER SUPPLY
< COMPONENT DIAGNOSIS > [VQ35DE]
P0603 ECM POWER SUPPLY
Description INFOID:0000000003388114

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 vol-
ume learning value memory, etc.

PBIA9222J

DTC Logic INFOID:0000000003388115

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
ECM power supply cir- ECM back up RAM system does not function [ECM power supply (back up) circuit is
P0603
cuit properly. open or shorted.]
ECM

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 1 second.
2. Start engine and let it idle for 1 second.
3. Turn ignition switch OFF, wait at least 10 seconds, and then turn it ON.
4. Repeat steps 2 and 3 for 4 times.
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-342, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388116

1.CHECK ECM POWER SUPPLY

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the voltage between ECM harness connector terminals.

Revision: 2008 October EC-342 2009 Murano

 P0603 ECM POWER SUPPLY
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
+ Voltage
Connector Terminal Connector Terminal
EC
F8 77 E16 112 Battery voltage
Is the inspection result normal?
YES >> GO TO 3. C
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
D
Check the following.
15 A fuse (No. 50)
IPDM E/R harness connector F12
Harness for open or short between ECM and battery E

>> Repair or replace harness or connectors.

F
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal? G
YES >> GO TO 4.
NO >> Repair or replace harness or connectors.
4.PERFORM DTC CONFIRMATION PROCEDURE H

1. Turn ignition switch ON.

2. Erase DTC.
3. Perform DTC CONFIRMATION PROCEDURE. I
See EC-342, "DTC Logic".
Is the 1st trip DTC P0603 displayed again?
YES >> GO TO 5. J
NO >> INSPECTION END
5.REPLACE ECM K
1. Replace ECM.
2. Go to EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
L

>> INSPECTION END

M

Revision: 2008 October EC-343 2009 Murano

 P0605 ECM
< COMPONENT DIAGNOSIS > [VQ35DE]
P0605 ECM
Description INFOID:0000000003388117

The ECM consists of a microcomputer and connectors for signal

input and output and for power supply. The ECM controls the engine.

PBIA9222J

DTC Logic INFOID:0000000003388118

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
A) ECM calculation function is malfunctioning.
P0605 Engine control module B) ECM EEP-ROM system is malfunctioning. ECM
C) ECM self shut-off function is malfunctioning.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1. Turn ignition switch ON.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-345, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds, and then turn it ON.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-345, "Diagnosis Procedure".
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds, and then turn it ON.
3. Repeat step 2 for 32 times.
4. Check 1st trip DTC.
Is 1st trip DTC detected?

Revision: 2008 October EC-344 2009 Murano

 P0605 ECM
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> Go to EC-345, "Diagnosis Procedure".
NO >> INSPECTION END A
Diagnosis Procedure INFOID:0000000003388119

1.INSPECTION START EC

1. Turn ignition switch ON.

2. Erase DTC.
3. Perform DTC CONFIRMATION PROCEDURE. C
See EC-344, "DTC Logic".
Is the 1st trip DTC P0605 displayed again?
D
YES >> GO TO 2.
NO >> INSPECTION END
2.REPLACE ECM E
1. Replace ECM.
2. Go to EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
F

>> INSPECTION END

G

Revision: 2008 October EC-345 2009 Murano

 P0607 ECM
< COMPONENT DIAGNOSIS > [VQ35DE]
P0607 ECM
Description INFOID:0000000003388120

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic 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.
DTC Logic INFOID:0000000003388121

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
When detecting error during the initial diagno-
P0607 CAN communication bus ECM
sis of CAN controller of ECM.

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-346, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388122

1.INSPECTION START
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC CONFIRMATION PROCEDURE.
See EC-346, "DTC Logic".
4. Check DTC.
Is the DTC P0607 displayed again?
Yes >> GO TO 2.
No >> INSPECTION END
2.REPLACE ECM
1. Replace ECM.
2. Go to EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".

>> INSPECTION END

Revision: 2008 October EC-346 2009 Murano

 P0643 SENSOR POWER SUPPLY
< COMPONENT DIAGNOSIS > [VQ35DE]
P0643 SENSOR POWER SUPPLY
A
DTC Logic INFOID:0000000003388123

DTC DETECTION LOGIC EC

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name C
Harness or connectors
(APP sensor 1 circuit is shorted.)
(TP sensor circuit is shorted.) D
[CMP sensor (PHASE) circuit is shorted.)
(PSP sensor circuit is shorted.)
Sensor power supply ECM detects that the voltage of power
P0643 (Battery current sensor circuit is shorted.)
circuit short source for sensor is excessively low or high.
Accelerator pedal position sensor E
Throttle position sensor
Camshaft position sensor (PHASE)
Power steering pressure sensor
Battery current sensor F

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING G
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. H
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION: I
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>> GO TO 2. J
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC K
Is DTC detected?
YES >> Go to EC-347, "Diagnosis Procedure".
L
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388124

M
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection". N
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection. O
2.CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
P
2. Turn ignition switch ON.
3. Check the voltage between APP sensor harness connector and ground.

APP sensor
Ground Voltage (V)
Connector Terminal
E110 4 Ground Approx. 5

Revision: 2008 October EC-347 2009 Murano

 P0643 SENSOR POWER SUPPLY
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.

ECM Sensor
Connector Terminal Name Connector Terminal
47 TP sensor F29 1
51 Battery current sensor F76 1
F8 55 PSP sensor F62 3
59 CMP sensor (PHASE) (bank 1) F26 1
63 CMP sensor (PHASE) (bank 2) F69 1
E16 83 APP sensor E110 4
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair short to ground or short to power in harness or connectors.
4.CHECK COMPONENTS
Check the following.
Camshaft position sensor (PHASE) (Refer to EC-266, "Component Inspection".)
Battery current sensor (Refer to EC-366, "Component Inspection".)
Power steering pressure sensor (Refer to EC-340, "Component Inspection".)
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace malfunctioning component.
5.CHECK TP SENSOR
Refer to EC-177, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Go to EC-177, "Special Repair Requirement".

>> INSPECTION END

7.CHECK APP SENSOR
Refer to EC-415, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Go to EC-415, "Special Repair Requirement".

>> INSPECTION END

9.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

Revision: 2008 October EC-348 2009 Murano

 P0643 SENSOR POWER SUPPLY
< COMPONENT DIAGNOSIS > [VQ35DE]
>> INSPECTION END
A

EC

Revision: 2008 October EC-349 2009 Murano

 P0850 PNP SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
P0850 PNP SWITCH
Description INFOID:0000000003388125

When the selector lever position is P or N, park/neutral position (PNP) signal from the TCM is sent to ECM.
DTC Logic INFOID:0000000003388126

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
The signal of the park/neutral position (PNP)
Park/neutral position [The park/neutral position (PNP) signal
P0850 signal does not change during driving after the
switch circuit is open or shorted.]
engine is started.
TCM

DTC CONFIRMATION PROCEDURE

1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 5.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 3.
3.CHECK PNP SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select P/N POSI SW in DATA MONITOR mode with CONSULT-III. Then check the P/N POSI SW sig-
nal under the following conditions.

Position (Selector lever) Known-good signal

N or P position ON
Except above position OFF
Is the inspection result normal?
YES >> GO TO 4.
NO >> Go to EC-351, "Diagnosis Procedure".
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Select DATA MONITOR mode with CONSULT-III.
2. Start engine and warm it up to normal operating temperature.
3. Maintain the following conditions for at least 50 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.

ENG SPEED 1,100 - 6,375 rpm

COOLAN TEMP/S More than 70C (158F)
B/FUEL SCHDL 4.0 - 31.8 msec

Revision: 2008 October EC-350 2009 Murano

 P0850 PNP SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
VHCL SPEED SE More than 64 km/h (40 mph)
A
Selector lever Suitable position
4. Check 1st trip DTC.
Is 1st trip DTC detected? EC
YES >> Go to EC-351, "Diagnosis Procedure".
NO >> INSPECTION END
5.PERFORM COMPONENT FUNCTION CHECK C
Perform component function check. Refer to EC-351, "Component Function Check".
NOTE:
Use component function check to check the overall function of the park/neutral position (PNP) signal circuit. D
During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END E
NO >> Go to EC-351, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388127
F
1.PERFORM COMPONENT FUNCTION CHECK
1. Turn ignition switch ON. G
2. Check the voltage between ECM harness connector terminals.

ECM H
+ Condition Voltage
Connector
Terminal Terminal
P or N Battery voltage I
Selector lever
E16 102 112
position Except above Approx. 0 V
Is the inspection result normal? J
YES >> INSPECTION END
NO >> Go to EC-351, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388128 K

1.CHECK DTC WITH TCM

Refer to EC-521, "DTC Index". L
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace malfunctioning part. M

2.CHECK STARTING SYSTEM

Turn ignition switch OFF, then turn it to START. N
Does starter motor operate?
YES >> GO TO 3.
NO >> Refer to BCS-17, "COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)". O
3.CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
P
2. Disconnect TCM harness connector.
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between TCM harness connector and IPDM E/R harness connector.

Revision: 2008 October EC-351 2009 Murano

 P0850 PNP SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]

TCM IPDM E/R

Continuity
Connector Terminal Connector Terminal
F23 20 F12 72 Existed
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect IPDM E/R harness connectors.
2. Disconnect ECM harness connector.
3. Check the continuity between ECM harness connector and IPDM E/R harness connector.

ECM IPDM E/R

Continuity
Connector Terminal Connector Terminal
E16 102 E10 30 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> Repair or replace malfunctioning part.

Revision: 2008 October EC-352 2009 Murano

 P1148, P1168 CLOSED LOOP CONTROL
< COMPONENT DIAGNOSIS > [VQ35DE]
P1148, P1168 CLOSED LOOP CONTROL
A
DTC Logic INFOID:0000000003388129

DTC DETECTION LOGIC EC

NOTE:
DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosis for the corresponding DTC. C

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
The closed loop control function for bank 1 does D
Closed loop control Harness or connectors
P1148 not operate even when vehicle is being driven
function (bank 1) (The A/F sensor 1 circuit is open or short-
in the specified condition.
ed.)
The closed loop control function for bank 2 does A/F sensor 1 E
Closed loop control
P1168 not operate even when vehicle is being driven A/F sensor 1 heater
function (bank 2)
in the specified condition.

Revision: 2008 October EC-353 2009 Murano

 P1212 TCS COMMUNICATION LINE
< COMPONENT DIAGNOSIS > [VQ35DE]
P1212 TCS COMMUNICATION LINE
Description INFOID:0000000003388130

This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse
signals are exchanged between ECM and ABS actuator and electric unit (control unit).
Be sure to erase the malfunction information such as DTC not only for ABS actuator and electric unit
(control unit) but also for ECM after TCS related repair.
DTC Logic INFOID:0000000003388131

DTC DETECTION LOGIC

NOTE:
If DTC P1212 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
If DTC P1212 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
to EC-346, "DTC Logic".
Freeze frame data is not stored in the ECM for this self-diagnosis.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
ECM cannot receive the information from (The CAN communication line is open or short-
P1212 TCS communication line ABS actuator and electric unit (control ed.)
unit) continuously. ABS actuator and electric unit (control unit)
Dead (Weak) battery

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-354, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388132

Go to BRC-5, "Work Flow".

Revision: 2008 October EC-354 2009 Murano

 P1217 ENGINE OVER TEMPERATURE
< COMPONENT DIAGNOSIS > [VQ35DE]
P1217 ENGINE OVER TEMPERATURE
A
DTC Logic INFOID:0000000003388133

DTC DETECTION LOGIC EC

NOTE:
If DTC P1217 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
If DTC P1217 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer C
to EC-346, "DTC Logic".
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is D
indicated.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause E
Harness or connectors
Cooling fan does not operate properly (Over- (The cooling fan circuit is open or short-
heat). ed.) F
Cooling fan system does not operate proper- IPDM E/R (Cooling fan relays)
Engine over tempera- ly (Overheat). Cooling fan motor
P1217
ture (Overheat) Engine coolant was not added to the system Radiator hose
using the proper filling method. Radiator G
Engine coolant is not within the specified Radiator cap
range. Water pump
Thermostat
H
CAUTION:
When a malfunction is indicated, always replace the coolant. Refer to CO-8, "Draining". Also, replace
the engine oil. Refer to LU-8, "Draining".
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Always use I
coolant with the proper mixture ratio. Refer to MA-16, "FOR NORTH AMERICA : Anti-Freeze Cool-
ant Mixture Ratio".
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted. J
DTC CONFIRMATION PROCEDURE
1.PERFORM COMPONENT FUNCTION CHECK K
Perform component function check. Refer to EC-355, "Component Function Check".
NOTE:
Use component function check to check the overall function of the cooling fan. During this check, a DTC might L
not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END M
NO >> Go to EC-356, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388134

N
1.PERFORM COMPONENT FUNCTION CHECK-I
WARNING:
O
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure 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. P

Revision: 2008 October EC-355 2009 Murano

 P1217 ENGINE OVER TEMPERATURE
< COMPONENT DIAGNOSIS > [VQ35DE]
Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
Is the coolant level in the reservoir tank and/or radiator below the
proper range?
YES >> Go to EC-356, "Diagnosis Procedure".
NO >> GO TO 2.

SEF621W

2.PERFORM COMPONENT FUNCTION CHECK-II

Confirm whether customer filled the coolant or not.
Did customer fill the coolant?
YES >> Go to EC-356, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM COMPONENT FUNCTION CHECK-III
With CONSULT-III
1. Turn ignition switch ON.
2. Perform COOLING FAN in ACTIVE TEST mode with CONSULT-III.
3. Check that cooling fan motors-1 and -2 operate at each speed (LOW/MID/HI).
Without CONSULT-III
Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PCS-10, "Diagnosis
Description".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-356, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388135

1.CHECK COOLING FAN OPERATION

With CONSULT-III
1. Turn ignition switch ON.
2. Perform COOLING FAN in ACTIVE TEST mode with CONSULT-III.
3. Check that cooling fans-1 and -2 operate at each speed (LOW/MID/HI).
Without CONSULT-III
1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PCS-10, "Diagnosis
Description".
2. Check that cooling fans-1 and -2 operate at each speed (Low/Middle/High).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to EC-434, "Diagnosis Procedure".
2.CHECK COOLING SYSTEM FOR LEAKAGE-I
Check cooling system for leakage. Refer to CO-8, "Inspection".
Is leakage detected?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK COOLING SYSTEM FOR LEAKAGE-II
Check the following for leakage.
Hose
Radiator
Water pump

Revision: 2008 October EC-356 2009 Murano

 P1217 ENGINE OVER TEMPERATURE
< COMPONENT DIAGNOSIS > [VQ35DE]
>> Repair or replace malfunctioning part.
4.CHECK RADIATOR CAP A

Check radiator cap. Refer to CO-12, "RADIATOR CAP : Inspection".

Is the inspection result normal? EC
YES >> GO TO 5.
NO >> Replace radiator cap.
5.CHECK THERMOSTAT C
Check thermostat. Refer to CO-24, "Inspection".
Is the inspection result normal?
D
YES >> GO TO 6.
NO >> Replace thermostat
6.CHECK ENGINE COOLANT TEMPERATURE SENSOR E
Refer to EC-171, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7. F
NO >> Replace engine coolant temperature sensor.
7.CHECK MAIN 12 CAUSES
G
If the cause cannot be isolated, check the following.

Engine Step Inspection item Equipment Standard Reference page

H
OFF 1 Blocked radiator Visual No blocking
Blocked condenser
Blocked radiator grille
Blocked bumper I
2 Coolant mixture Coolant tester MA-15, "FOR NORTH AMERICA : Engine Oil Recom-
mendation"
3 Coolant level Visual Coolant up to MAX level in CO-8, "Inspection" J
reservoir tank and radiator
filler neck
4 Radiator cap Pressure tester CO-12, "RADIATOR CAP : Inspection" K
ON* 2 5 Coolant leakage Visual No leakage CO-8, "Inspection"

ON*2 6 Thermostat Touch the upper and Both hoses should be hot CO-24, "Inspection"
lower radiator hoses L

ON*1 7 Cooling fan CONSULT-III Operating EC-434, "Component

Function Check"
OFF 8 Combustion gas leak- Color checker chemical Negative M
age tester 4 Gas analyzer

ON*3 9 Coolant temperature Visual Gauge less than 3/4 when

gauge driving N
Coolant overflow to res- Visual No overflow during driving CO-8, "Inspection"
ervoir tank and idling

OFF*4 10 Coolant return from res- Visual Should be initial level in CO-8, "Inspection" O
ervoir tank to radiator reservoir tank
OFF 11 Cylinder head Straight gauge feeler 0.1 mm (0.004 in) Maxi- EM-114, "Inspection"
gauge mum distortion (warping) P
12 Cylinder block and pis- Visual No scuffing on cylinder EM-126, "Inspection"
tons walls or piston
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (56 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.

Revision: 2008 October EC-357 2009 Murano

 P1217 ENGINE OVER TEMPERATURE
< COMPONENT DIAGNOSIS > [VQ35DE]
For more information, refer to CO-3, "Troubleshooting Chart".

>> INSPECTION END

Revision: 2008 October EC-358 2009 Murano

 P1225 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P1225 TP SENSOR
A
Description INFOID:0000000003591572

Electric throttle control actuator consists of throttle control motor, EC

throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into C
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to D
driving conditions via the throttle control motor.

PBIB0145E E
DTC Logic INFOID:0000000003388137

DTC DETECTION LOGIC F

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
G
Closed throttle position Closed throttle position learning value is exces- Electric throttle control actuator
P1225
learning performance sively low. (TP sensor 1 and 2)

DTC CONFIRMATION PROCEDURE H

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
I
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. J
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
K
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
L
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Check 1st trip DTC. M
Is 1st trip DTC detected?
YES >> Go to EC-359, "Diagnosis Procedure".
NO >> INSPECTION END N

Diagnosis Procedure INFOID:0000000003388138

O
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct. P

Revision: 2008 October EC-359 2009 Murano

 P1225 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Check if foreign matter is caught between the throttle valve (1)
and the housing.
- Electric throttle control actuator (2)
- : Vehicle front
Is the inspection result normal?
YES >> GO TO 2.
NO >> Remove the foreign matter and clean the electric throttle
control actuator inside.

JMBIA1132ZZ

2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator.
2. Go to EC-360, "Special Repair Requirement".

>> INSPECTION END

Special Repair Requirement INFOID:0000000003591588

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Revision: 2008 October EC-360 2009 Murano

 P1226 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P1226 TP SENSOR
A
Description INFOID:0000000003591573

Electric throttle control actuator consists of throttle control motor, EC

throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into C
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to D
driving conditions via the throttle control motor.

PBIB0145E E
DTC Logic INFOID:0000000003388141

DTC DETECTION LOGIC F

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
G
Closed throttle position Closed throttle position learning is not per- Electric throttle control actuator
P1226
learning performance formed successfully, repeatedly. (TP sensor 1 and 2)

DTC CONFIRMATION PROCEDURE H

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- I
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. J
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
K
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE L
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Repeat steps 2 and 3 for 32 times. M
5. Check 1st trip DTC.
Is 1st trip DTC detected?
N
YES >> Go to EC-361, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003598158
O

1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Turn ignition switch OFF. P
2. Remove the intake air duct.

Revision: 2008 October EC-361 2009 Murano

 P1226 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Check if foreign matter is caught between the throttle valve (1)
and the housing.
- Electric throttle control actuator (2)
- : Vehicle front
Is the inspection result normal?
YES >> GO TO 2.
NO >> Remove the foreign matter and clean the electric throttle
control actuator inside.

JMBIA1132ZZ

2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator.
2. Go to EC-360, "Special Repair Requirement".

>> INSPECTION END

Special Repair Requirement INFOID:0000000003591589

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Revision: 2008 October EC-362 2009 Murano

 P1421 COLD START CONTROL
< COMPONENT DIAGNOSIS > [VQ35DE]
P1421 COLD START CONTROL
A
Description INFOID:0000000003388144

ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition. EC
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
DTC Logic INFOID:0000000003388145

C
DTC DETECTION LOGIC
NOTE:
If DTC P1421 is displayed with other DTC, first perform the trouble diagnosis for other DTC. D

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
ECM does not control ignition timing and engine Lack of intake air volume E
Cold start emission reduction
P1421 idle speed properly when engine is started with Fuel injection system
strategy monitoring
pre-warming up condition. ECM

DTC CONFIRMATION PROCEDURE F

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- G
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. H
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
I
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE J
With CONSULT-III
1. Turn ignition switch ON.
2. Select DATA MONITOR mode with CONSULT-III. K
3. Check that the COOLAN TEMP/S indication is between 4C (39F) and 36C (97F).
If COOLAN TEMP/S indication is within the specified value, go to the following steps.
If COOLAN TEMP/S indication is out of the specified value, cool engine down or warm engine up and go
L
to step 1.
4. Start engine and let it idle for 5 minutes.
5. Check 1st trip DTC.
With GST M
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> Go to EC-363, "Diagnosis Procedure". N
NO >> INSPECTION END

O
Diagnosis Procedure INFOID:0000000003388146

1.PERFORM IDLE AIR VOLUME LEARNING

P
Perform EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 2.
NO >> Follow the instruction of Idle Air Volume Learning.
2.CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.

Revision: 2008 October EC-363 2009 Murano

 P1421 COLD START CONTROL
< COMPONENT DIAGNOSIS > [VQ35DE]
Crushed intake air passage
Intake air passage clogging
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace malfunctioning part
3.CHECK FUEL INJECTION SYSTEM FUNCTION
Perform EC-226, "DTC Logic" for DTC P0171, P0174.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Go to EC-228, "Diagnosis Procedure" for DTC P0171, P0174.
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC CONFIRMATION PROCEDURE.
See EC-363, "DTC Logic".
Is the 1st trip DTC P1421 displayed again?
YES >> GO TO 5.
NO >> INSPECTION END
5.REPLACE ECM
1. Replace ECM.
2. Go to EC-15, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".

>> INSPECTION END

Revision: 2008 October EC-364 2009 Murano

 P1550 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P1550 BATTERY CURRENT SENSOR
A
Description INFOID:0000000003388147

The power generation voltage variable control enables fuel consumption to be decreased by reducing the EC
engine load which is caused by the power generation of the generator. The battery current sensor is installed
to the battery cable at the negative terminal. The sensor measures the charging/discharging current of the bat-
tery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control is
performed. When performing the power generation voltage variable control, ECM calculates the target power C
generation voltage based on the sensor signal. And ECM sends the calculated value as the power generation
command value to IPDM E/R. For the details of the power generation voltage variable control, refer to CHG-7,
"System Description". D
CAUTION:
Never connect the electrical component or the ground wire directly to the battery terminal. The con-
nection causes the malfunction of the power generation voltage variable control, and then battery dis-
charge may occur. E

DTC Logic INFOID:0000000003388148

F
DTC DETECTION LOGIC
NOTE:
If DTC P1550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
G
EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
H
The output voltage of the battery current Harness or connectors
Battery current sensor circuit
P1550 sensor remains within the specified (The sensor circuit is open or shorted.)
range/performance
range while engine is running. Battery current sensor
I
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- J
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. K
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
L

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE M
1. Start engine and wait at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected? N
YES >> Go to EC-365, "Diagnosis Procedure".
NO >> INSPECTION END
O
Diagnosis Procedure INFOID:0000000003388149

1.CHECK GROUND CONNECTION P

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
Revision: 2008 October EC-365 2009 Murano
 P1550 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Disconnect battery current sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between battery current sensor harness connector and ground.

Battery current sensor

Ground Voltage (V)
Connector Terminal
F76 1 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between battery current sensor harness connector and ECM harness connector.

Battery current sensor ECM

Continuity
Connector Terminal Connector Terminal
F76 2 F8 44 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between battery current sensor harness connector and ECM harness connector.

Battery current sensor ECM

Continuity
Connector Terminal Connector Terminal
F76 3 F8 42 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK BATTERY CURRENT SENSOR
Refer to EC-366, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace battery negative cable assembly.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003388150

1.CHECK BATTERY CURRENT SENSOR

1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.

Revision: 2008 October EC-366 2009 Murano

 P1550 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Disconnect battery negative cable (1).
- : Vehicle front A
- : To body ground
4. Install jumper cable (A) between battery negative terminal and
body ground. EC
5. Turn ignition switch ON.
6. Check the voltage between ECM harness connector terminals
under the following conditions.
C
ECM
ALBIA0076ZZ
+ Voltage (V) D
Connector
Terminal Terminal
42
44
F8 (Battery current Approx. 2.5 E
(Sensor ground)
sensor signal)
Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to PG-3, "How to Handle Battery".
Is the inspection result normal? F
YES >> INSPECTION END
NO >> Replace battery negative cable assembly.
G

Revision: 2008 October EC-367 2009 Murano

 P1551, P1552 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P1551, P1552 BATTERY CURRENT SENSOR
Description INFOID:0000000003664590

The power generation voltage variable control enables fuel consumption to be decreased by reducing the
engine load which is caused by the power generation of the generator. The battery current sensor is installed
to the battery cable at the negative terminal. The sensor measures the charging/discharging current of the bat-
tery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control is
performed. When performing the power generation voltage variable control, ECM calculates the target power
generation voltage based on the sensor signal. And ECM sends the calculated value as the power generation
command value to IPDM E/R. For the details of the power generation voltage variable control, refer to CHG-7,
"System Description".
CAUTION:
Never connect the electrical component or the ground wire directly to the battery terminal. The con-
nection causes the malfunction of the power generation voltage variable control, and then battery dis-
charge may occur.
DTC Logic INFOID:0000000003388152

DTC DETECTION LOGIC

NOTE:
If DTC P1551 or P1552 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Battery current sensor circuit An excessively low voltage from the sen-
P1551 Harness or connectors
low input sor is sent to ECM.
(The sensor circuit is open or shorted.)
Battery current sensor circuit An excessively high voltage from the sen- Battery current sensor
P1552
high input sor is sent to ECM.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V with ignition
switch ON

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-368, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003664591

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.

Revision: 2008 October EC-368 2009 Murano

 P1551, P1552 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Repair or replace ground connection.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT A

1. Disconnect battery current sensor harness connector.

2. Turn ignition switch ON.
EC
3. Check the voltage between battery current sensor harness connector and ground.

Battery current sensor

Ground Voltage (V) C
Connector Terminal
F76 1 Ground Approx. 5
Is the inspection result normal? D
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT E

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.
F
3. Check the continuity between battery current sensor harness connector and ECM harness connector.

Battery current sensor ECM

Continuity G
Connector Terminal Connector Terminal
F76 2 F8 44 Existed
4. Also check harness for short to ground and short to power. H
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. I
4.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between battery current sensor harness connector and ECM harness connector. J

Battery current sensor ECM

Continuity
Connector Terminal Connector Terminal K
F76 3 F8 42 Existed
2. Also check harness for short to ground and short to power.
L
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. M
5.CHECK BATTERY CURRENT SENSOR
Refer to EC-366, "Component Inspection".
Is the inspection result normal? N
YES >> GO TO 6.
NO >> Replace battery negative cable assembly.
O
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
P
>> INSPECTION END
Component Inspection INFOID:0000000003635142

1.CHECK BATTERY CURRENT SENSOR

1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.

Revision: 2008 October EC-369 2009 Murano

 P1551, P1552 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Disconnect battery negative cable (1).

: Vehicle front
: To body ground

4. Install jumper cable (A) between battery negative terminal and

body ground.
5. Turn ignition switch ON.
6. Check the voltage between ECM harness connector terminals
under the following conditions.
ALBIA0076ZZ

ECM
+ Voltage (V)
Connector
Terminal Terminal
42
44
F8 (Battery current Approx. 2.5
(Sensor ground)
sensor signal)
Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to PG-3, "How to Handle Battery".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace battery negative cable assembly.

Revision: 2008 October EC-370 2009 Murano

 P1553 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P1553 BATTERY CURRENT SENSOR
A
Description INFOID:0000000003664592

The power generation voltage variable control enables fuel consumption to be decreased by reducing the EC
engine load which is caused by the power generation of the generator. The battery current sensor is installed
to the battery cable at the negative terminal. The sensor measures the charging/discharging current of the bat-
tery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control is
performed. When performing the power generation voltage variable control, ECM calculates the target power C
generation voltage based on the sensor signal. And ECM sends the calculated value as the power generation
command value to IPDM E/R. For the details of the power generation voltage variable control, refer to CHG-7,
"System Description". D
CAUTION:
Never connect the electrical component or the ground wire directly to the battery terminal. The con-
nection causes the malfunction of the power generation voltage variable control, and then battery dis-
charge may occur. E

DTC Logic INFOID:0000000003388156

F
DTC DETECTION LOGIC
NOTE:
If DTC P1553 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
G
EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
H
The signal voltage transmitted from the Harness or connectors
Battery current sensor perfor-
P1553 sensor to ECM is higher than the amount (The sensor circuit is open or shorted.)
mance
of the maximum power generation. Battery current sensor
I
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- J
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. K
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
L

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE M
1. Start engine and wait at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected? N
YES >> Go to EC-371, "Diagnosis Procedure".
NO >> INSPECTION END
O
Diagnosis Procedure INFOID:0000000003664593

1.CHECK GROUND CONNECTION P

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
Revision: 2008 October EC-371 2009 Murano
 P1553 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Disconnect battery current sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between battery current sensor harness connector and ground.

Battery current sensor

Ground Voltage (V)
Connector Terminal
F76 1 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between battery current sensor harness connector and ECM harness connector.

Battery current sensor ECM

Continuity
Connector Terminal Connector Terminal
F76 2 F8 44 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between battery current sensor harness connector and ECM harness connector.

Battery current sensor ECM

Continuity
Connector Terminal Connector Terminal
F76 3 F8 42 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK BATTERY CURRENT SENSOR
Refer to EC-366, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace battery negative cable assembly.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003635141

1.CHECK BATTERY CURRENT SENSOR

1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.

Revision: 2008 October EC-372 2009 Murano

 P1553 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Disconnect battery negative cable (1).
A
: Vehicle front
: To body ground
EC
4. Install jumper cable (A) between battery negative terminal and
body ground.
5. Turn ignition switch ON.
6. Check the voltage between ECM harness connector terminals C
under the following conditions.
ALBIA0076ZZ

ECM D
+ Voltage (V)
Connector
Terminal Terminal
E
42
44
F8 (Battery current Approx. 2.5
(Sensor ground)
sensor signal)
Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to PG-3, "How to Handle Battery".
F

Is the inspection result normal?

YES >> INSPECTION END G
NO >> Replace battery negative cable assembly.

Revision: 2008 October EC-373 2009 Murano

 P1554 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P1554 BATTERY CURRENT SENSOR
Description INFOID:0000000003664588

The power generation voltage variable control enables fuel consumption to be decreased by reducing the
engine load which is caused by the power generation of the generator. The battery current sensor is installed
to the battery cable at the negative terminal. The sensor measures the charging/discharging current of the bat-
tery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control is
performed. When performing the power generation voltage variable control, ECM calculates the target power
generation voltage based on the sensor signal. And ECM sends the calculated value as the power generation
command value to IPDM E/R. For the details of the power generation voltage variable control, refer to CHG-7,
"System Description".
CAUTION:
Never connect the electrical component or the ground wire directly to the battery terminal. The con-
nection causes the malfunction of the power generation voltage variable control, and then battery dis-
charge may occur.
DTC Logic INFOID:0000000003388160

DTC DETECTION LOGIC

NOTE:
If DTC P1554 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
The output voltage of the battery current Harness or connectors
Battery current sensor perfor-
P1554 sensor is lower than the specified value (The sensor circuit is open or shorted.)
mance
while the battery voltage is high enough. Battery current sensor

DTC CONFIRMATION PROCEDURE

1.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-374, "Component Function Check".
NOTE:
Use component function check to check the overall function of the battery current sensor circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-375, "Diagnosis Procedure".
Component Function Check INFOID:0000000003388161

1.PRECONDITIONING
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 12.8 V at idle.
Before performing the following procedure, confirm that all load switches and A/C switch are turned
OFF.

>> GO TO 2.
2.PERFORM COMPONENT FUNCTION CHECK
With CONSULT-III
1. Start engine and let it idle.
2. Select BAT CUR SEN in DATA MONITOR mode with CONSULT-III.
3. Check BAT CUR SEN indication for 10 seconds.
BAT CUR SEN should be above 2,300mV at least once.
Without CONSULT-III
1. Start engine and let it idle.
2. Check voltage between ECM harness connector terminals under the following conditions.

Revision: 2008 October EC-374 2009 Murano

 P1554 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
+ Voltage (V)
Connector
Terminal Terminal
EC
42 44
F8 (Battery current (Sensor Above 2.3 at least once
sensor signal) ground)
C
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-375, "Diagnosis Procedure"
D
Diagnosis Procedure INFOID:0000000003591747

1.CHECK GROUND CONNECTION E

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal? F
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT G

1. Disconnect battery current sensor harness connector.

2. Turn ignition switch ON.
H
3. Check the voltage between battery current sensor harness connector and ground.

Battery current sensor

Ground Voltage (V) I
Connector Terminal
F76 1 Ground Approx. 5
Is the inspection result normal? J
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT K

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector. L
3. Check the continuity between battery current sensor harness connector and ECM harness connector.

Battery current sensor ECM

Continuity M
Connector Terminal Connector Terminal
F76 2 F8 44 Existed
4. Also check harness for short to ground and short to power. N
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. O
4.CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between battery current sensor harness connector and ECM harness connector. P

Battery current sensor ECM

Continuity
Connector Terminal Connector Terminal
F76 3 F8 42 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?

Revision: 2008 October EC-375 2009 Murano

 P1554 BATTERY CURRENT SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK BATTERY CURRENT SENSOR
Refer to EC-376, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace battery negative cable assembly.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003664589

1.CHECK BATTERY CURRENT SENSOR

1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
3. Disconnect battery negative cable (1).
- : Vehicle front
- : To body ground
4. Install jumper cable (A) between battery negative terminal and
body ground.
5. Turn ignition switch ON.
6. Check the voltage between ECM harness connector terminals
under the following conditions.

ECM
ALBIA0076ZZ
+ Voltage (V)
Connector
Terminal Terminal
42
44
F8 (Battery current Approx. 2.5
(Sensor ground)
sensor signal)
Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to PG-3, "How to Handle Battery".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace battery negative cable assembly.

Revision: 2008 October EC-376 2009 Murano

 P1564 ASCD STEERING SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
P1564 ASCD STEERING SWITCH
A
Description INFOID:0000000003388164

ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation EC
of switch, and determines which button is operated.
Refer to EC-51, "System Diagram" for the ASCD function.
DTC Logic INFOID:0000000003388165 C

DTC DETECTION LOGIC

NOTE: D
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
EC-344, "DTC Logic".
E
Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
An excessively high voltage signal from the
ASCD steering switch is sent to ECM. F
Harness or connectors
ECM detects that input signal from the
(The switch circuit is open or shorted.)
P1564 ASCD steering switch ASCD steering switch is out of the specified
ASCD steering switch
range.
ECM detects that the ASCD steering switch
ECM G
is stuck ON.

DTC CONFIRMATION PROCEDURE H

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test. I
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. J

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE K

1. Turn ignition switch ON and wait at least 10 seconds.

2. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
3. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds. L
4. Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 sec-
onds.
5. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds. M
6. Check DTC.
Is DTC detected?
YES >> Go to EC-377, "Diagnosis Procedure". N
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388166
O
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
P
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-III

Revision: 2008 October EC-377 2009 Murano

 P1564 ASCD STEERING SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Turn ignition switch ON.
2. Select MAIN SW, CANCEL SW, RESUME/ACC SW and SET SW in DATA MONITOR mode with
CONSULT-III.
3. Check each item indication under the following conditions.

Monitor item Condition Indication

Pressed ON
MAIN SW MAIN switch
Released OFF
Pressed ON
CANCEL SW CANCEL switch
Released OFF

RESUME/ACCEL- Pressed ON
RESUME/ACC SW
ERATE switch Released OFF
Pressed ON
SET SW SET/COAST switch
Released OFF

Without CONSULT-III
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals under the following conditions.

ECM

Con- + Condition Voltage (V)

nector Terminal Terminal
MAIN switch: Pressed Approx. 0
CANCEL switch: Pressed Approx. 1
85 92
E16 (ASCD steering switch (ASCD steering switch SET/COAST switch: Pressed Approx. 2
signal) ground)
RESUME/ACCELERATE switch: Pressed Approx. 3
All ASCD steering switches: Released Approx. 4
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 3.
3.CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect combination switch harness connector.
4. Check the continuity between combination switch and ECM harness connector.

Combination switch ECM

Continuity
Terminal Connector Terminal
16 E16 92 Existed
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M77, E105
Combination switch (spiral cable)
Harness for open and short between ECM and combination switch

>> Repair open circuit, short to ground or short to power in harness or connectors.

Revision: 2008 October EC-378 2009 Murano

 P1564 ASCD STEERING SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]

5.CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT A
1. Check the continuity between combination switch and ECM harness connector.

Combination switch ECM EC

Continuity
Terminal Connector Terminal
13 E16 85 Existed
C
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 7. D
NO >> GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following. E
Harness connectors M77, E105
Combination switch (spiral cable)
Harness for open and short between ECM and combination switch F

>> Repair open circuit, short to ground or short to power in harness or connectors.
7.CHECK ASCD STEERING SWITCH G

Refer to EC-379, "Component Inspection".

Is the inspection result normal? H
YES >> GO TO 8.
NO >> Replace ASCD steering switch.
8.CHECK INTERMITTENT INCIDENT I
Refer to GI-40, "Intermittent Incident".

J
>> INSPECTION END
Component Inspection INFOID:0000000003388167

K
1.CHECK ASCD STEERING SWITCH
1. Turn ignition switch OFF.
2. Disconnect combination switch (spiral cable) harness connector. L
3. Check resistance between combination switch harness connector terminals as per the following.

Combination switch M
Condition Resistance ()
Connector Terminals
MAIN switch: Pressed Approx. 0
N
CANCEL switch: Pressed Approx. 250
M33 13 and 16 SET/COAST switch: Pressed Approx. 660
RESUME/ACCELERATE switch: Pressed Approx. 1,480 O
All ASCD steering switches: Released Approx. 4,000
Is the inspection result normal?
YES >> INSPECTION END P
NO >> Replace ASCD steering switch

Revision: 2008 October EC-379 2009 Murano

 P1572 ASCD BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
P1572 ASCD BRAKE SWITCH
Description INFOID:0000000003388168

When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
Refer to EC-51, "System Diagram" for the ASCD function.
DTC Logic INFOID:0000000003388169

DTC DETECTION LOGIC

NOTE:
If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-344, "DTC Logic".
This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not
stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when ignition switch is turned OFF. And even when malfunction A is detected
in two consecutive trips, DTC is not stored in ECM memory.

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
When the vehicle speed is above 30 km/h Harness or connectors
(19 MPH), ON signals from the stop lamp (The stop lamp switch circuit is shorted.)
A)
switch and the ASCD brake switch are sent Harness or connectors
to the ECM at the same time. (The ASCD brake switch circuit is shorted.)
P1572 ASCD brake switch Stop lamp switch
ASCD brake switch signal is not sent to ASCD brake switch
B) ECM for extremely long time while the ve- Incorrect stop lamp switch installation
hicle is being driven. Incorrect ASCD brake switch installation
ECM

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
NOTE:
The procedure for malfunction B is not described. It takes extremely long time to complete the procedure for
malfunction B. By performing the procedure for malfunction A, the condition that causes malfunction B can be
detected.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Start engine (VDC switch OFF).
2. Select DATA MONITOR mode with CONSULT-III.
3. Press MAIN switch and check that CRUISE illuminates.
4. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure 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.

VHCL SPEED SE More than 30 km/h (19 mph)

Selector lever Suitable position

Revision: 2008 October EC-380 2009 Murano

 P1572 ASCD BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
5. Check 1st trip DTC.
With GST A
Follow the procedure With CONSULT-III above.
Is 1st trip DTC detected?
YES >> Go to EC-381, "Diagnosis Procedure". EC
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE
C
With CONSULT-III
1. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
CAUTION:
Always drive vehicle at a safe speed. D
NOTE:
This procedure 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. E

VHCL SPEED SE More than 30 km/h (19 mph)

Selector lever Suitable position F
Depress the brake pedal for more than
Driving location five seconds so as not to come off from
the above-mentioned vehicle speed. G
2. Check 1st trip DTC.
With GST
Follow the procedure With CONSULT-III above. H
Is 1st trip DTC detected?
YES >> Go to EC-381, "Diagnosis Procedure".
NO >> INSPECTION END I

Diagnosis Procedure INFOID:0000000003388170

J
1.CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Turn ignition switch ON. K
2. Select BRAKE SW1 in DATA MONITOR mode with CONSULT-III.
3. Check BRAKE SW1 indication under the following conditions.
L
Monitor item Condition Indication
Slightly depressed OFF
BRAKE SW1 Brake pedal
Fully released ON M

Without CONSULT-III
1. Turn ignition switch ON. N
2. Check the voltage between ECM harness connector terminals.

ECM O
+ Condition Voltage
Connector
Terminal Terminal
P
110 Slightly depressed Approx. 0 V
E16 (ASCD brake 112 Brake pedal
switch signal) Fully released Battery voltage

Is the inspection result normal?

YES >> GO TO 2.
NO >> GO TO 3.

Revision: 2008 October EC-381 2009 Murano

 P1572 ASCD BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]

2.CHECK OVERALL FUNCTION-II

With CONSULT-III
Check BRAKE SW2 indication in DATA MONITOR mode.

Monitor item Condition Indication

Slightly depressed ON
BRAKE SW2 Brake pedal
Fully released OFF

Without CONSULT-III
Check the voltage between ECM harness connector terminals.

ECM
+ Condition Voltage
Connector
Terminal Terminal
106 Slightly depressed Battery voltage
E16 (Stop lamp 112 Brake pedal
switch signal) Fully released Approx. 0 V

Is the inspection result normal?

YES >> GO TO 12.
NO >> GO TO 7.
3.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ASCD brake switch harness connector and ground.

ASCD brake switch

Ground Voltage
Connector Terminal
E49 1 Ground Battery voltage
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E103
10 A fuse (No. 3)
Harness for open or short between ASCD brake switch and fuse

>> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.

ASCD brake switch ECM

Continuity
Connector Terminal Connector Terminal
E49 2 E16 110 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?

Revision: 2008 October EC-382 2009 Murano

 P1572 ASCD BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 6.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. A
6.CHECK ASCD BRAKE SWITCH
Refer to EC-384, "Component Inspection (ASCD Brake Switch)"
EC
Is the inspection result normal?
YES >> GO TO 12.
NO >> Replace ASCD brake switch.
C
7.CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector. D
3. Check the voltage between stop lamp switch harness connector and ground.

Stop lamp switch E

Vehicle serial number Ground Voltage
Connector Terminal
Up to JN8AZ18U*9W100000
F
Up to JN8AZ18U*9W710000
E115 3
Up to JN8AZ18W*9W200000
Up to JN8AZ18W*9W810000 G
Ground Battery voltage
From JN8AZ18U*9W100001
From JN8AZ18U*9W710001
E116 1 H
From JN8AZ18W*9W200001
From JN8AZ18W*9W810001
Is the inspection result normal? I
YES >> GO TO 9.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART J
Check the following.
Fuse block (J/B) connector E103
10 A fuse (No. 7) K
Harness for open or short between stop lamp switch and battery

>> Repair open circuit, short to ground or short to power in harness or connectors. L
9.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector. M
2. Check the continuity between stop lamp switch harness connector and ECM harness connector.

Stop lamp switch ECM N

Vehicle serial number Continuity
Connector Terminal Connector Terminal
Up to JN8AZ18U*9W100000
Up to JN8AZ18U*9W710000 O
E115 4
Up to JN8AZ18W*9W200000
Up to JN8AZ18W*9W810000
E16 106 Existed P
From JN8AZ18U*9W100001
From JN8AZ18U*9W710001
E116 2
From JN8AZ18W*9W200001
From JN8AZ18W*9W810001
3. Also check harness for short to ground and short to power.
Is the inspection result normal?

Revision: 2008 October EC-383 2009 Murano

 P1572 ASCD BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 11.
NO >> GO TO 10.
10.DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E103
Harness for open or short between stop lamp switch and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.
11.CHECK STOP LAMP SWITCH
Refer to EC-384, "Component Inspection (Stop Lamp Switch)"
Is the inspection result normal?
YES >> GO TO 12.
NO >> Replace stop lamp switch.
12.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection (ASCD Brake Switch) INFOID:0000000003388171

1.CHECK ASCD BRAKE SWITCH-I

1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Check the continuity between ASCD brake switch terminals under the following conditions.

Terminals Condition Continuity

Fully released Existed
1 and 2 Brake pedal
Slightly depressed Not existed
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK ASCD BRAKE SWITCH-II
1. Adjust ASCD brake switch installation. Refer to BR-9, "Inspection and Adjustment".
2. Check the continuity between ASCD brake switch terminals under the following conditions.

Terminals Condition Continuity

Fully released Existed
1 and 2 Brake pedal
Slightly depressed Not existed
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace ASCD brake switch.
Component Inspection (Stop Lamp Switch) INFOID:0000000003388173

1.CHECK STOP LAMP SWITCH-I

1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check harness continuity between stop lamp switch terminals under the following conditions.

Revision: 2008 October EC-384 2009 Murano

 P1572 ASCD BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]

Vehicle serial number Terminals Condition Continuity A

Up to JN8AZ18U*9W100000
Fully released Not existed
Up to JN8AZ18U*9W710000
3 and 4 EC
Up to JN8AZ18W*9W200000
Slightly depressed Existed
Up to JN8AZ18W*9W810000
Brake pedal
From JN8AZ18U*9W100001 C
Fully released Not existed
From JN8AZ18U*9W710001
1 and 2
From JN8AZ18W*9W200001
Slightly depressed Existed D
From JN8AZ18W*9W810001
Is the inspection result normal?
YES >> INSPECTION END E
NO >> GO TO 2.
2.CHECK STOP LAMP SWITCH-II
1. Adjust stop lamp switch installation. Refer to BR-9, "Inspection and Adjustment". F
2. Check harness continuity between stop lamp switch terminals under the following conditions.

Vehicle serial number Terminals Condition Continuity G

Up to JN8AZ18U*9W100000
Fully released Not existed
Up to JN8AZ18U*9W710000 H
3 and 4
Up to JN8AZ18W*9W200000
Slightly depressed Existed
Up to JN8AZ18W*9W810000
Brake pedal
From JN8AZ18U*9W100001 I
Fully released Not existed
From JN8AZ18U*9W710001
1 and 2
From JN8AZ18W*9W200001
Slightly depressed Existed J
From JN8AZ18W*9W810001
Is the inspection result normal?
YES >> INSPECTION END K
NO >> Replace stop lamp switch.

Revision: 2008 October EC-385 2009 Murano

 P1574 ASCD VEHICLE SPEED SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P1574 ASCD VEHICLE SPEED SENSOR
Description INFOID:0000000003388174

The ECM receives two vehicle speed signals via CAN communication line. One is sent from combination
meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD con-
trol. Refer to EC-51, "System Diagram" for ASCD functions.
DTC Logic INFOID:0000000003388175

DTC DETECTION LOGIC

NOTE:
If DTC P1574 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer
to EC-333, "DTC Logic".
If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-344, "DTC Logic".
If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
to EC-346, "DTC Logic".

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
Harness or connectors
(The CAN communication line is open or
shorted.)
ASCD vehicle speed The difference the between two vehicle speed Combination meter
P1574
sensor signals is out of the specified range. ABS actuator and electric unit (control unit)
Wheel sensor
TCM
ECM

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine (VDC switch OFF).
2. Drive the vehicle at more than 40 km/h (25 MPH).
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure 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.
3. Check DTC.
Is DTC detected?
YES >> Go to EC-386, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388176

1.CHECK DTC WITH TCM

Check DTC with TCM. Refer to TM-32, "Diagnosis Description".
Is the inspection result normal?

Revision: 2008 October EC-386 2009 Murano

 P1574 ASCD VEHICLE SPEED SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 2.
NO >> Perform trouble shooting relevant to DTC indicated. A
2.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Refer to BRC-29, "CONSULT-III Function".
EC
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace malfunctioning part.
C
3.CHECK COMBINATION METER FUNCTION
Refer to MWI-34, "CONSULT-III Function (METER/M&A)".
D
>> INSPECTION END

Revision: 2008 October EC-387 2009 Murano

 P1700 CVT CONTROL SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
P1700 CVT CONTROL SYSTEM
Description INFOID:0000000003388177

This DTC is displayed with other DTC regarding TCM. Perform the trouble diagnosis for corresponding DTC.
Refer to EC-521, "DTC Index". When this DTC is detected, the ASCD control is canceled.

Revision: 2008 October EC-388 2009 Murano

 P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)
< COMPONENT DIAGNOSIS > [VQ35DE]
P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)
A
Description INFOID:0000000003388178

ECM receives primary speed sensor signal from TCM via the CAN communication line. ECM uses this signal EC
for engine control.
DTC Logic INFOID:0000000003388179

C
DTC DETECTION LOGIC
NOTE:
If DTC P1715 is displayed with DTC UXXXX first perform the trouble diagnosis for DTC UXXXX. D
If DTC P1715 is displayed with DTC P0335, first perform the trouble diagnosis for DTC P0335. Refer
to EC-260, "DTC Logic".
If DTC P1715 is displayed with DTC P0340, P0345, first perform the trouble diagnosis for DTC P0340,
E
P0345. Refer to EC-264, "DTC Logic".
If DTC P1715 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-344, "DTC Logic".
If DTC P1715 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer F
to EC-346, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause G
Harness or connectors
(The CAN communication line is open or short-
Primary speed sensor signal is different
Input speed sensor ed) H
from the theoretical value calculated by
P1715 (Primary speed sensor) Harness or connectors
ECM from secondary sensor signal and
(TCM output) (Primary speed sensor circuit is open or short-
engine rpm signal.
ed)
TCM I
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING J
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds. K
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
L
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine. M
2. Drive vehicle at a speed of more than 50 km/h (31 MPH) for at least 5 seconds.
3. Check 1st trip DTC.
Is 1st trip DTC detected? N
YES >> Go to EC-389, "Diagnosis Procedure".
NO >> INSPECTION END
O
Diagnosis Procedure INFOID:0000000003388180

1.CHECK DTC WITH TCM P

Check DTC with TCM. Refer to TM-129, "DTC Index".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble shooting relevant to DTC indicated.
2.REPLACE TCM
Replace TCM. Refer to TM-163, "Removal and Installation".

Revision: 2008 October EC-389 2009 Murano

 P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)
< COMPONENT DIAGNOSIS > [VQ35DE]

>> INSPECTION END

Revision: 2008 October EC-390 2009 Murano

 P1720 VSS
< COMPONENT DIAGNOSIS > [VQ35DE]
P1720 VSS
A
Description INFOID:0000000003388181

ECM receives two vehicle speed signals via the CAN communication line. One is sent from ABS actuator and EC
electric unit (control unit) via combination meter, and the other is from TCM (Transmission control module).
ECM uses these signals for engine control.
DTC Logic INFOID:0000000003388182 C

DTC DETECTION LOGIC

NOTE: D
If DTC P1720 is displayed with DTC UXXXX first perform the trouble diagnosis for DTC UXXXX.
If DTC P1720 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
to EC-346, "DTC Logic".
E

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors F
(Secondary speed sensor circuit is open or
shorted.)
Harness or connectors
P1720
Vehicle speed sensor The difference between two vehicle speed (Wheel sensor circuit is open or shorted.) G
(TCM output) signals is out of the specified range. TCM
Secondary speed sensor
ABS actuator and electric unit (control unit)
Wheel sensor H
Combination meter

DTC CONFIRMATION PROCEDURE

I
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test. J
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
K

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE L
1. Start engine.
2. Drive vehicle at a speed of 20 km/h (12 MPH) or more for at least 5 seconds without depressing the brake
pedal depressing. M
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-391, "Diagnosis Procedure". N
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388183
O
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to TM-129, "DTC Index". P
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble shooting relevant to DTC indicated.
2.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Refer to BRC-102, "DTC No. Index".
Is the inspection result normal?

Revision: 2008 October EC-391 2009 Murano

 P1720 VSS
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 3.
NO >> perform trouble shooting relevant to DTC indicated.
3.CHECK COMBINATION METER FUNCTION
Refer to MWI-75, "DTC Index".

>> INSPECTION END

Revision: 2008 October EC-392 2009 Murano

 P1800 VIAS CONTROL SOLENOID VALVE 1
< COMPONENT DIAGNOSIS > [VQ35DE]
P1800 VIAS CONTROL SOLENOID VALVE 1
A
Description INFOID:0000000003388184

The VIAS control solenoid valve 1 cuts the intake manifold vacuum signal for power valve 1 control. It EC
responds to ON/OFF signals from the ECM. When the solenoid is OFF, the vacuum signal from the intake
manifold is cut. When the ECM sends an ON signal the coil pulls the plunger downward and sends the vac-
uum signal to the power valve actuator 1.
C
DTC Logic INFOID:0000000003388185

DTC DETECTION LOGIC D

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors E
An excessively low or high voltage signal
VIAS control solenoid valve 1 (The solenoid valve 1 circuit is open or
P1800 is sent to ECM through the VIAS control
circuit shorted.)
solenoid valve 1.
VIAS control solenoid valve 1
F
DTC CONFIRMATION PROCEDURE
1.CONDITIONING
G
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. H
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle. I

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE J
1. Start engine and let it idle for at least 5 seconds.
2. Check 1st trip DTC.
K
Is 1st trip DTC detected?
YES >> Go to EC-393, "Diagnosis Procedure".
NO >> INSPECTION END
L
Diagnosis Procedure INFOID:0000000003388186

1.CHECK VIAS CONTROL SOLENOID VALVE 1 POWER SUPPLY CIRCUIT M

1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Turn ignition switch ON. N
4. Check the voltage between VIAS control solenoid valve 1 harness connector and ground.

VIAS control solenoid valve 1 O

Ground Voltage
Connector Terminal
F74 1 Ground Battery voltage
Is the inspection result normal? P
YES >> GO TO 2.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
2.CHECK VIAS CONTROL SOLENOID VALVE 1 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.

Revision: 2008 October EC-393 2009 Murano

 P1800 VIAS CONTROL SOLENOID VALVE 1
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Check the continuity between VIAS control solenoid valve 1 harness connector and ECM harness con-
nector.

VIAS control solenoid valve 1 ECM

Continuity
Connector Terminal Connector Terminal
F74 2 F7 27 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK VIAS CONTROL SOLENOID VALVE 1
Refer to EC-394, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace VIAS control solenoid valve 1.
4.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003388187

1.CHECK VIAS CONTROL SOLENOID VALVE 1

With CONSULT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect vacuum hoses connected to VIAS control solenoid valve 1.
4. Turn ignition switch ON.
5. Select VIAS S/V-1 in ACTIVE TEST mode with CONSULT-III.
6. Check air passage continuity and operation delay time under the
following conditions.

Condition Air passage continuity Air passage continuity

(VIAS S/V-1) between (A) and (B) between (A) and (C)
ON Existed Not existed
OFF Not existed Existed

JMBIA0180ZZ

Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Disconnect vacuum hoses connected to VIAS volume control solenoid valve 1.

Revision: 2008 October EC-394 2009 Murano

 P1800 VIAS CONTROL SOLENOID VALVE 1
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Check air passage continuity and operation delay time under the
following conditions. A

Air passage continuity Air passage continuity

Condition
between (A) and (B) between (A) and (C) EC
12 V direct current supply be-
Existed Not existed
tween terminals 1 and 2
No supply Not existed Existed C
Is the inspection result normal?
YES >> INSPECTION END PBIB2532E

NO >> Replace VIAS control solenoid valve 1 D

Revision: 2008 October EC-395 2009 Murano

 P1801 VIAS CONTROL SOLENOID VALVE 2
< COMPONENT DIAGNOSIS > [VQ35DE]
P1801 VIAS CONTROL SOLENOID VALVE 2
Description INFOID:0000000003388188

The VIAS control solenoid valve 2 cuts the intake manifold vacuum signal for power valve 2 control. It
responds to ON/OFF signals from the ECM. When the solenoid is OFF, the vacuum signal from the intake
manifold is cut. When the ECM sends an ON signal the coil pulls the plunger downward and sends the vac-
uum signal to the power valve actuator 2.
DTC Logic INFOID:0000000003388189

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
An excessively low or high voltage signal
VIAS control solenoid valve 2 (The solenoid valve 2 circuit is open or
P1801 is sent to ECM through the VIAS control
circuit shorted.)
solenoid valve 2.
VIAS control solenoid valve 2

DTC CONFIRMATION PROCEDURE

1.CONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-396, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388190

1.CHECK VIAS CONTROL SOLENOID VALVE 2 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve 2 harness connector.
3. Turn ignition switch ON.
4. Check the voltage between VIAS control solenoid valve 2 harness connector and ground.

VIAS control solenoid valve 2

Ground Voltage
Connector Terminal
F75 1 Ground Battery voltage
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
2.CHECK VIAS CONTROL SOLENOID VALVE 2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.

Revision: 2008 October EC-396 2009 Murano

 P1801 VIAS CONTROL SOLENOID VALVE 2
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Check the continuity between VIAS control solenoid valve 2 harness connector and ECM harness con-
nector. A

VIAS control solenoid valve 2 ECM

Continuity
Connector Terminal Connector Terminal EC
F75 2 F7 26 Existed
4. Also check harness for short to ground and short to power. C
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. D
3.CHECK VIAS CONTROL SOLENOID VALVE 2
Refer to EC-397, "Component Inspection".
E
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace VIAS control solenoid valve 2.
F
4.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
G
>> INSPECTION END
Component Inspection INFOID:0000000003388191
H

1.CHECK VIAS CONTROL SOLENOID VALVE 2

With CONSULT-III I
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect vacuum hoses connected to VIAS control solenoid valve 2.
J
4. Turn ignition switch ON.
5. Select VIAS S/V-2 in ACTIVE TEST mode with CONSULT-III.
6. Check air passage continuity and operation delay time under the
following conditions. K

Condition Air passage continuity Air passage continuity

(VIAS S/V-2) between (A) and (B) between (A) and (C) L
ON Existed Not existed
OFF Not existed Existed
M

JMBIA0180ZZ
N
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve 2 harness connector. O
3. Disconnect vacuum hoses connected to VIAS volume control solenoid valve 2.

Revision: 2008 October EC-397 2009 Murano

 P1801 VIAS CONTROL SOLENOID VALVE 2
< COMPONENT DIAGNOSIS > [VQ35DE]
4. Check air passage continuity and operation delay time under the
following conditions.

Air passage continuity Air passage continuity

Condition
between (A) and (B) between (A) and (C)
12 V direct current supply be-
Existed Not existed
tween terminals 1 and 2
No supply Not existed Existed
Is the inspection result normal?
YES >> INSPECTION END PBIB2532E

NO >> Replace VIAS control solenoid valve 2

Revision: 2008 October EC-398 2009 Murano

 P1805 BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
P1805 BRAKE SWITCH
A
Description INFOID:0000000003388192

Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed. EC
This signal is used mainly to decrease the engine speed when the vehicle is being driven.
DTC Logic INFOID:0000000003388193

C
DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause D
Harness or connectors
A brake switch signal is not sent to ECM for ex-
(Stop lamp switch circuit is open or short-
P1805 Brake switch tremely long time while the vehicle is being driv-
ed.) E
en.
Stop lamp switch

DTC CONFIRMATION PROCEDURE

F
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds. G
3. Erase the DTC.
4. Check 1st trip DTC.
Is 1st trip DTC detected? H
YES >> Go to EC-399, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388194
I

1.CHECK STOP LAMP SWITCH CIRCUIT

J
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.

K
Brake pedal Stop lamp
Fully released Not illuminated
Slightly depressed Illuminated L
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2. M
2.CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch harness connector. N
2. Check the voltage between stop lamp switch harness connector and ground.

Revision: 2008 October EC-399 2009 Murano

 P1805 BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]

Stop lamp switch

Vehicle serial number Ground Voltage
Connector Terminal
Up to JN8AZ18U*9W100000
Up to JN8AZ18U*9W710000
E115 3
Up to JN8AZ18W*9W200000
Up to JN8AZ18W*9W810000
Ground Battery voltage
From JN8AZ18U*9W100001
From JN8AZ18U*9W710001
E116 1
From JN8AZ18W*9W200001
From JN8AZ18W*9W810001
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E103
10 A fuse (No. 7)
Harness for open or short between battery and stop lamp switch

>> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect stop lamp switch harness connector.
2. Disconnect ECM harness connector.
3. Check the continuity between stop lamp switch harness connector and ECM harness connector.

Stop lamp switch ECM

Vehicle serial number Continuity
Connector Terminal Connector Terminal
Up to JN8AZ18U*9W100000
Up to JN8AZ18U*9W710000
E115 4
Up to JN8AZ18W*9W200000
Up to JN8AZ18W*9W810000
E16 106 Existed
From JN8AZ18U*9W100001
From JN8AZ18U*9W710001
E116 2
From JN8AZ18W*9W200001
From JN8AZ18W*9W810001
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E103
Harness for open or short between ECM and stop lamp switch

>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK STOP LAMP SWITCH
Refer to EC-401, "Component Inspection (Stop Lamp Switch)".

Revision: 2008 October EC-400 2009 Murano

 P1805 BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the inspection result normal?
YES >> GO TO 7. A
NO >> Replace stop lamp switch.
7.CHECK INTERMITTENT INCIDENT
EC
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END C

Component Inspection (Stop Lamp Switch) INFOID:0000000003591766

1.CHECK STOP LAMP SWITCH-I D

1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check harness continuity between stop lamp switch terminals under the following conditions. E

Vehicle serial number Terminals Condition Continuity

F
Up to JN8AZ18U*9W100000
Fully released Not existed
Up to JN8AZ18U*9W710000
3 and 4
Up to JN8AZ18W*9W200000 G
Slightly depressed Existed
Up to JN8AZ18W*9W810000
Brake pedal
From JN8AZ18U*9W100001
Fully released Not existed H
From JN8AZ18U*9W710001
1 and 2
From JN8AZ18W*9W200001
Slightly depressed Existed
From JN8AZ18W*9W810001 I
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2. J
2.CHECK STOP LAMP SWITCH-II
1. Adjust stop lamp switch installation. Refer to BR-9, "Inspection and Adjustment".
K
2. Check harness continuity between stop lamp switch terminals under the following conditions.

Vehicle serial number Terminals Condition Continuity

L
Up to JN8AZ18U*9W100000
Fully released Not existed
Up to JN8AZ18U*9W710000
3 and 4
Up to JN8AZ18W*9W200000 M
Slightly depressed Existed
Up to JN8AZ18W*9W810000
Brake pedal
From JN8AZ18U*9W100001
Fully released Not existed N
From JN8AZ18U*9W710001
1 and 2
From JN8AZ18W*9W200001
Slightly depressed Existed
From JN8AZ18W*9W810001 O
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace stop lamp switch. P

Revision: 2008 October EC-401 2009 Murano

 P2100, P2103 THROTTLE CONTROL MOTOR RELAY
< COMPONENT DIAGNOSIS > [VQ35DE]
P2100, P2103 THROTTLE CONTROL MOTOR RELAY
Description INFOID:0000000003388196

Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is controlled ON/OFF 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.
DTC Logic INFOID:0000000003388197

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
Throttle control motor ECM detects that the voltage of power source (Throttle control motor relay circuit is
P2100
relay circuit open for throttle control motor is excessively low. open)
Throttle control motor relay
Harness or connectors
Throttle control motor ECM detects that the throttle control motor relay (Throttle control motor relay circuit is
P2103
relay circuit short is stuck ON. shorted)
Throttle control motor relay

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V.
Witch DTC is detected?
P2100 >> GO TO 2.
P2103 >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P2100
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
Is DTC detected?
YES >> Go to EC-402, "Diagnosis Procedure".
NO >> INSPECTION END
3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P2103
1. Turn ignition switch ON and wait at least 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-402, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388198

1.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.

Revision: 2008 October EC-402 2009 Murano

 P2100, P2103 THROTTLE CONTROL MOTOR RELAY
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between IPDM E/R harness connector and ECM harness connector. A

IPDM E/R ECM

Continuity
Connector Terminal Connector Terminal EC
F12 70 F7 15 Existed
5. Also check harness for short to ground and short to power. C
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. D
2.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Check the continuity between IPDM E/R harness connector and ECM harness connector.
E
IPDM E/R ECM
Continuity
Connector Terminal Connector Terminal
F
F12 54 F7 2 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal? G
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK FUSE H

1. Disconnect 15 A fuse (No. 51) from IPDM E/R.

2. Check if 15 A fuse is blown.
I
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace 15 A fuse. J
4.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal? K
YES >> Replace IPDM E/R.
NO >> Repair or replace harness or connectors.
L

Revision: 2008 October EC-403 2009 Murano

 P2101 ELECTRIC THROTTLE CONTROL FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
Description INFOID:0000000003388199

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. The throttle position
sensor provides feedback to the ECM, when opens/closes the throttle valve in response to driving conditions
via the throttle control motor.
DTC Logic INFOID:0000000003388200

DTC DETECTION LOGIC

NOTE:
If DTC P2101 is displayed with DTC P2100, first perform the trouble diagnosis for DTC P2100. Refer to
EC-402, "DTC Logic".
If DTC P2101 is displayed with DTC 2119, first perform the trouble diagnosis for DTC P2119. Refer to
EC-411, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
Electric throttle control Electric throttle control function does not oper- (Throttle control motor circuit is open or
P2101
performance ate properly. shorted)
Electric throttle control actuator

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V when
engine is running.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
Is DTC detected?
YES >> Go to EC-404, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388201

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
1. Check the voltage between ECM harness connector terminals.

Revision: 2008 October EC-404 2009 Murano

 P2101 ELECTRIC THROTTLE CONTROL FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM A
+ Condition Voltage
Connector Terminal Condition Terminal
EC
Ignition switch OFF Approx. 0 V
F7 2 E16 112
Ignition switch ON Battery voltage
Is the inspection result normal? C
YES >> GO TO 7.
NO >> GO TO 3.
3.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II D

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.
E
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between IPDM E/R harness connector and ECM harness connector.

IPDM E/R ECM

F
Continuity
Connector Terminal Connector Terminal
F12 70 F7 15 Existed G
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4. H
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
I
1. Check the continuity between IPDM E/R harness connector and ECM harness connector.

IPDM E/R ECM J

Continuity
Connector Terminal Connector Terminal
F12 54 F7 2 Existed
K
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5. L
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK FUSE
1. Disconnect 15 A fuse (No. 51) from IPDM E/R. M
2. Check if 15 A fuse is blown.
Is the inspection result normal?
YES >> GO TO 6. N
NO >> Replace 15 A fuse.
6.CHECK INTERMITTENT INCIDENT
O
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> Replace IPDM E/R. P
NO >> Repair or replace harness or connectors.
7.CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

Revision: 2008 October EC-405 2009 Murano

 P2101 ELECTRIC THROTTLE CONTROL FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]

Electric throttle control actuator ECM

Continuity
Connector Terminal Connector Terminal
5 Not existed
5
6 Existed
F29 F7
5 Existed
6
6 Not existed
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace malfunctioning part.
8.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve (1)
and the housing.
- Electric throttle control actuator (2)
- : Vehicle front
Is the inspection result normal?
YES >> GO TO 9.
NO >> Remove the foreign matter and clean the electric throttle
control actuator inside.

JMBIA1132ZZ

9.CHECK THROTTLE CONTROL MOTOR

Refer to EC-406, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 11.
10.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair or replace harness or connectors.
11.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Refer to EC-407, "Special Repair Requirement".

>> INSPECTION END

Component Inspection INFOID:0000000003388202

1.CHECK THROTTLE CONTROL MOTOR

1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector.
3. Check resistance between electric throttle control actuator terminals as per the following.

Terminals Resistance
5 and 6 Approx. 1 - 15 [at 25C (77F)]
Is the inspection result normal?

Revision: 2008 October EC-406 2009 Murano

 P2101 ELECTRIC THROTTLE CONTROL FUNCTION
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> INSPECTION END
NO >> GO TO 2. A
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
EC
2. Go to EC-407, "Special Repair Requirement".

>> INSPECTION END

C
Special Repair Requirement INFOID:0000000003388203

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING D

Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

E
>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement" F

>> END
G

Revision: 2008 October EC-407 2009 Murano

 P2118 THROTTLE CONTROL MOTOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P2118 THROTTLE CONTROL MOTOR
Description INFOID:0000000003388204

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. The throttle position
sensor provides feedback to the ECM, when opens/closes the throttle valve in response to driving conditions
via the throttle control motor.
DTC Logic INFOID:0000000003388205

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connectors
Throttle control motor ECM detects short in both circuits between (Throttle control motor circuit is shorted.)
P2118
circuit short ECM and throttle control motor. Electric throttle control actuator
(Throttle control motor)

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
Is DTC detected?
YES >> Go to EC-408, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388206

1.CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connections.
2.CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect electric throttle control actuator harness connector.
2. Disconnect ECM harness connector.
3. Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

Revision: 2008 October EC-408 2009 Murano

 P2118 THROTTLE CONTROL MOTOR
< COMPONENT DIAGNOSIS > [VQ35DE]

Electric throttle control actuator ECM A

Continuity
Connector Terminal Connector Terminal
5 Not existed
5 EC
6 Existed
F29 F7
5 Existed
6
6 Not existed C
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
D
YES >> GO TO 3.
NO >> Repair or replace malfunctioning part.
3.CHECK THROTTLE CONTROL MOTOR E
Refer to EC-409, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 4. F
NO >> GO TO 5.
4.CHECK INTERMITTENT INCIDENT
G
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 5. H
NO >> Repair or replace harness or connectors.
5.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator. I
2. Go to EC-409, "Special Repair Requirement".

>> INSPECTION END J

Component Inspection INFOID:0000000003591712

K
1.CHECK THROTTLE CONTROL MOTOR
1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector. L
3. Check resistance between electric throttle control actuator terminals as per the following.

Terminals Resistance M
5 and 6 Approx. 1 - 15 [at 25C (77F)]
Is the inspection result normal?
N
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR O
1. Replace electric throttle control actuator.
2. Go to EC-407, "Special Repair Requirement".
P
>> INSPECTION END
Special Repair Requirement INFOID:0000000003388208

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

Revision: 2008 October EC-409 2009 Murano

 P2118 THROTTLE CONTROL MOTOR
< COMPONENT DIAGNOSIS > [VQ35DE]
>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Revision: 2008 October EC-410 2009 Murano

 P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
A
Description INFOID:0000000003388209

Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. EC
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 throt-
tle valve and sends the voltage signals to the ECM. The ECM judges the current opening angle of the throttle
valve from these signals and opens/closes the throttle valve in response to driving conditions via the throttle C
control motor.
DTC Logic INFOID:0000000003388210
D

DTC DETECTION LOGIC

E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Electric throttle control actuator does not func-
A) tion properly due to the return spring malfunc-
F
tion.
Electric throttle control
P2119 Throttle valve opening angle in fail-safe mode is Electric throttle control actuator
actuator B)
not in specified range.
G
ECM detects that the throttle valve is stuck
C)
open.

DTC CONFIRMATION PROCEDURE H

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
I
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. J

>> GO TO 2.
K
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A AND B
1. Turn ignition switch ON and wait at least 1 second.
2. Shift selector lever to the D position and wait at least 3 seconds. L
3. Shift selector lever to the P position.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON and wait at least 1 second.
6. Shift selector lever to the D position and wait at least 3 seconds. M
7. Shift selector lever to the P position.
8. Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.
9. Check DTC. N
Is DTC detected?
YES >> Go to EC-412, "Diagnosis Procedure".
NO >> GO TO 3. O
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C
1. Turn ignition switch ON and wait at least 1 second.
2. Shift selector lever to the D position and wait at least 3 seconds. P
3. Shift selector lever to the N or P position.
4. Start engine and let it idle for 3 seconds.
5. Check DTC.
Is DTC detected?
YES >> Go to EC-412, "Diagnosis Procedure".
NO >> INSPECTION END

Revision: 2008 October EC-411 2009 Murano

 P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Diagnosis Procedure INFOID:0000000003630929

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 (1)
and the housing.
- Electric throttle control actuator (2)
- : Vehicle front
Is the inspection result normal?
YES >> GO TO 2.
NO >> Remove the foreign matter and clean the electric throttle
control actuator inside.

JMBIA1132ZZ

2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator.
2. Go to EC-360, "Special Repair Requirement".

>> INSPECTION END

Special Repair Requirement INFOID:0000000003388212

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Revision: 2008 October EC-412 2009 Murano

 P2122, P2123 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P2122, P2123 APP SENSOR
A
Description INFOID:0000000003388213

The accelerator pedal position sensor is installed on the upper end EC

of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal C
position into output voltage, and emit the voltage signals to the ECM.
The ECM judges the current opening angle of the accelerator pedal
from these signals and controls the throttle control motor based on D
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 engine operations such as fuel cut.
PBIB1741E E

DTC Logic INFOID:0000000003388214

F
DTC DETECTION LOGIC
NOTE:
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
G
Refer to EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
H
Accelerator pedal posi-
An excessively low voltage from the APP sen-
P2122 tion sensor 1 circuit low Harness or connectors
sor 1 is sent to ECM.
input (APP sensor 1 circuit is open or shorted.)
Accelerator pedal position sensor I
Accelerator pedal posi-
An excessively high voltage from the APP sen- (APP sensor 1)
P2123 tion sensor 1 circuit high
sor 1 is sent to ECM.
input
J
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
K
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. L
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle. M

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE N
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected? O
YES >> Go to EC-413, "Diagnosis Procedure".
NO >> INSPECTION END
P
Diagnosis Procedure INFOID:0000000003388215

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?

Revision: 2008 October EC-413 2009 Murano

 P2122, P2123 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between APP sensor harness connector and ground.

APP sensor
Ground Voltage (V)
Connector Terminal
E110 4 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK APP SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between APP sensor harness connector and ECM harness connector.

APP sensor ECM

Continuity
Connector Terminal Connector Terminal
E110 2 E16 84 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between APP sensor harness connector and ECM harness connector.

APP sensor ECM

Continuity
Connector Terminal Connector Terminal
E110 3 E16 81 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK APP SENSOR
Refer to EC-415, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Refer to EC-415, "Special Repair Requirement".

>> INSPECTION END

7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

Revision: 2008 October EC-414 2009 Murano

 P2122, P2123 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
>> INSPECTION END
A
Component Inspection INFOID:0000000003388216

1.CHECK ACCELERATOR PEDAL POSITION SENSOR EC

1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.
C

ECM
+ Condition Voltage (V) D
Connector Terminal Connector Terminal
81 Fully released 0.5 - 1.0
84
(APP sensor 1 sig-
(Sensor ground)
E
nal) Fully depressed 4.2 - 4.8
E16 E16 Accelerator pedal
82 Fully released 0.25 - 0.50
100
(APP sensor 2 sig-
(Sensor ground) Fully depressed 2.0 - 2.5 F
nal)
Is the inspection result normal?
YES >> INSPECTION END G
NO >> GO TO 2.
2.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly. H
2. Go to EC-415, "Special Repair Requirement".

>> INSPECTION END I

Special Repair Requirement INFOID:0000000003388217

J
1.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement".
K
>> GO TO 2.
2.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING L
Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".

>> GO TO 3. M
3.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement".
N

>> END
O

Revision: 2008 October EC-415 2009 Murano

 P2127, P2128 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P2127, P2128 APP SENSOR
Description INFOID:0000000003591807

The accelerator pedal position sensor is installed on the upper end

of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal
position into output voltage, and emit the voltage signals to the ECM.
The ECM judges the current opening angle 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
PBIB1741E
ECM uses this signal for engine operations such as fuel cut.
DTC Logic INFOID:0000000003388219

DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Accelerator pedal posi- Harness or connectors
An excessively low voltage from the APP sen-
P2127 tion sensor 2 circuit low (APP sensor 2 circuit is open or shorted.)
sor 2 is sent to ECM.
input [CKP sensor (POS) circuit is shorted.]
(Refrigerant pressure sensor circuit is
shorted.)
(EVAP control system pressure sensor
Accelerator pedal posi- circuit is shorted.)
An excessively high voltage from the APP sen- Accelerator pedal position sensor
P2128 tion sensor 2 circuit high
sor 2 is sent to ECM. (APP sensor 2)
input
Crankshaft position sensor (POS)
EVAP control system pressure sensor
Refrigerant pressure sensor

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-416, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388220

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".

Revision: 2008 October EC-416 2009 Murano

 P2127, P2128 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the inspection result normal?
YES >> GO TO 2. A
NO >> Repair or replace ground connection.
2.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
EC
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between APP sensor harness connector and ground.
C
APP sensor
Ground Voltage (V)
Connector Terminal
D
E110 5 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 6. E
NO >> GO TO 3.
3.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
F
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between APP sensor harness connector and ECM harness connector.
G
APP sensor ECM
Continuity
Connector Terminal Connector Terminal H
E110 5 E16 87 Existed
Is the inspection result normal?
YES >> GO TO 4. I
NO >> Repair open circuit.
4.CHECK SENSOR POWER SUPPLY CIRCUIT J
Check harness for short to power and short to ground, between the following terminals.

ECM Sensor K
Connector Terminal Name Connector Terminal
72 Refrigerant pressure sensor E300 1
F8 L
76 CKP sensor (POS) F20 1
87 APP sensor E110 5
E16
91 EVAP control system pressure sensor B17 3
M
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair short to ground or short to power in harness or connectors. N
5.CHECK COMPONENTS
Check the following.
Crankshaft position sensor (POS) (Refer to EC-263, "Component Inspection".) O
EVAP control system pressure sensor (Refer to EC-302, "Component Inspection".)
Refrigerant pressure sensor (Refer to EC-463, "Diagnosis Procedure".)
Is the inspection result normal? P
YES >> GO TO 10.
NO >> Replace malfunctioning components.
6.CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between APP sensor harness connector and ECM harness connector.

Revision: 2008 October EC-417 2009 Murano

 P2127, P2128 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

APP sensor ECM

Continuity
Connector Terminal Connector Terminal
E110 1 E16 100 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
7.CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between APP sensor harness connector and ECM harness connector.

APP sensor ECM

Continuity
Connector Terminal Connector Terminal
E110 6 E16 82 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK APP SENSOR
Refer to EC-418, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 9.
9.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Refer to EC-419, "Special Repair Requirement"

>> INSPECTION END

10.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003591812

1.CHECK ACCELERATOR PEDAL POSITION SENSOR

1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage (V)
Connector Terminal Connector Terminal
81 Fully released 0.5 - 1.0
84
(APP sensor 1 sig-
(Sensor ground) Fully depressed 4.2 - 4.8
nal)
E16 E16 Accelerator pedal
82 Fully released 0.25 - 0.50
100
(APP sensor 2 sig-
(Sensor ground) Fully depressed 2.0 - 2.5
nal)

Revision: 2008 October EC-418 2009 Murano

 P2127, P2128 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Is the inspection result normal?
YES >> INSPECTION END A
NO >> GO TO 2.
2.REPLACE ACCELERATOR PEDAL ASSEMBLY
EC
1. Replace accelerator pedal assembly.
2. Go to EC-419, "Special Repair Requirement".
C
>> INSPECTION END
Special Repair Requirement INFOID:0000000003591813

D
1.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement".
E

>> GO TO 2.
2.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING F
Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".

>> GO TO 3. G

3.PERFORM IDLE AIR VOLUME LEARNING

Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement". H

>> END
I

Revision: 2008 October EC-419 2009 Murano

 P2135 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P2135 TP SENSOR
Description INFOID:0000000003388223

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 two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signals 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 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.
PBIB0145E

DTC Logic INFOID:0000000003388224

DTC DETECTION LOGIC

NOTE:
If DTC P2135 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
Harness or connector
Throttle position sensor Rationally incorrect voltage is sent to ECM (TP sensor 1 or 2 circuit is open or short-
P2135 circuit range/perfor- compared with the signals from TP sensor 1 ed.)
mance and TP sensor 2. Electric throttle control actuator
(TP sensor 1 or 2)

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-420, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388225

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.

Revision: 2008 October EC-420 2009 Murano

 P2135 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

2.CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I A

1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
3. Check the voltage between electric throttle control actuator harness connector and ground.
EC

Electric throttle control actuator

Ground Voltage (V)
Connector Terminal C
F29 1 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 3. D
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT E
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between electric throttle control actuator harness connector and ECM harness con-
F
nector.

Electric throttle control actuator ECM

Continuity G
Connector Terminal Connector Terminal
F29 4 F8 36 Existed
4. Also check harness for short to ground and short to power. H
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors. I
4.CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between electric throttle control actuator harness connector and ECM harness con- J
nector.

Electric throttle control actuator ECM K

Continuity
Connector Terminal Connector Terminal
2 37
F29 F8 Existed L
3 38
2. Also check harness for short to ground and short to power.
Is the inspection result normal? M
YES >> GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK THROTTLE POSITION SENSOR N
Refer to EC-422, "Component Inspection".
Is the inspection result normal?
O
YES >> GO TO 7.
NO >> GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR P
1. Replace electric throttle control actuator.
2. Refer to EC-422, "Special Repair Requirement"

>> INSPECTION END

7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

Revision: 2008 October EC-421 2009 Murano

 P2135 TP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

>> INSPECTION END

Component Inspection INFOID:0000000003388226

1.CHECK THROTTLE POSITION SENSOR

1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Perform EC-422, "Special Repair Requirement".
4. Turn ignition switch ON.
5. Shift selector lever position to D.
6. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage
Connector Terminal Connector Terminal

37 Fully released More than 0.36 V

(TP sensor 1 signal) Fully depressed Less than 4.75 V
36
F8 F8 Accelerator pedal
(Sensor ground) Fully released Less than 4.75 V
38
(TP sensor 2 signal) Fully depressed More than 0.36 V
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Go to EC-422, "Special Repair Requirement".

>> INSPECTION END

Special Repair Requirement INFOID:0000000003388227

1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Revision: 2008 October EC-422 2009 Murano

 P2138 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
P2138 APP SENSOR
A
Description INFOID:0000000003591874

The accelerator pedal position sensor is installed on the upper end EC

of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal C
position into output voltage, and emit the voltage signals to the ECM.
The ECM judges the current opening angle of the accelerator pedal
from these signals and controls the throttle control motor based on D
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 engine operations such as fuel cut.
PBIB1741E E

DTC Logic INFOID:0000000003388229

F
DTC DETECTION LOGIC
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
G
EC-347, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
H
Harness or connector
(APP sensor 1 or 2 circuit is open or
shorted.)
[CKP sensor (POS) circuit is shorted.] I
(Refrigerant pressure sensor circuit is
Accelerator pedal posi- Rationally incorrect voltage is sent to ECM shorted.)
P2138 tion sensor circuit range/ compared with the signals from APP sensor 1 (EVAP control system pressure sensor
performance and APP sensor 2. circuit is shorted.) J
Accelerator pedal position sensor
(APP sensor 1 or 2)
Crankshaft position sensor (POS)
K
EVAP control system pressure sensor
Refrigerant pressure sensor

DTC CONFIRMATION PROCEDURE L

1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
M
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. N
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
O
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
P
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-424, "Diagnosis Procedure".
NO >> INSPECTION END

Revision: 2008 October EC-423 2009 Murano

 P2138 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Diagnosis Procedure INFOID:0000000003388230

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between APP sensor harness connector and ground.

APP sensor
Ground Voltage (V)
Connector Terminal
E110 4 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check the voltage between APP sensor harness connector and ground.

APP sensor
Ground Voltage (V)
Connector Terminal
E110 5 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 4.
4.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between APP sensor harness connector and ECM harness connector.

APP sensor ECM

Continuity
Connector Terminal Connector Terminal
E110 5 E16 87 Existed
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit.
5.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.

ECM Sensor
Connector Terminal Name Connector Terminal
72 Refrigerant pressure sensor E300 1
F8
76 CKP sensor (POS) F20 1

Revision: 2008 October EC-424 2009 Murano

 P2138 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
ECM Sensor
A
Connector Terminal Name Connector Terminal
87 APP sensor E110 5
E16
91 EVAP control system pressure sensor B17 3 EC
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair short to ground or short to power in harness or connectors. C
6.CHECK COMPONENTS
Check the following.
D
Crankshaft position sensor (POS) (Refer to EC-263, "Component Inspection".)
EVAP control system pressure sensor (Refer to EC-302, "Component Inspection".)
Refrigerant pressure sensor (Refer to EC-463, "Diagnosis Procedure".)
Is the inspection result normal? E
YES >> GO TO 11.
NO >> Replace malfunctioning components.
F
7.CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector. G
3. Check the continuity between APP sensor harness connector and ECM harness connector.

APP sensor ECM H

Continuity
Connector Terminal Connector Terminal
2 84
E110 E16 Existed
1 100 I
4. Also check harness for short to ground and short to power.
Is the inspection result normal? J
YES >> GO TO 8.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT K
1. Check the continuity between APP sensor harness connector and ECM harness connector.

APP sensor ECM

L
Continuity
Connector Terminal Connector Terminal
3 81
E110 E16 Existed M
6 82
2. Also check harness for short to ground and short to power.
Is the inspection result normal? N
YES >> GO TO 9.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
9.CHECK APP SENSOR O

Refer to EC-426, "Component Inspection".

Is the inspection result normal? P
YES >> GO TO 11.
NO >> GO TO 10.
10.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Refer to EC-426, "Special Repair Requirement".

Revision: 2008 October EC-425 2009 Murano

 P2138 APP SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
>> INSPECTION END
11.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection INFOID:0000000003591875

1.CHECK ACCELERATOR PEDAL POSITION SENSOR

1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.

ECM
+ Condition Voltage (V)
Connector Terminal Connector Terminal
81 Fully released 0.5 - 1.0
84
(APP sensor 1 sig-
(Sensor ground) Fully depressed 4.2 - 4.8
nal)
E16 E16 Accelerator pedal
82 Fully released 0.25 - 0.50
100
(APP sensor 2 sig-
(Sensor ground) Fully depressed 2.0 - 2.5
nal)
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Go to EC-426, "Special Repair Requirement".

>> INSPECTION END

Special Repair Requirement INFOID:0000000003591879

1.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Refer to EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement".

>> GO TO 2.
2.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".

>> GO TO 3.
3.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement".

>> END

Revision: 2008 October EC-426 2009 Murano

 P2A00, P2A03 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
P2A00, P2A03 A/F SENSOR 1
A
Description INFOID:0000000003591593

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen- EC
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor C
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current D
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
JMBIA0112GB E

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the F
sensor to ensure the required operating temperature of approxi-
mately 800C (1,472F).
G

PBIB3354E

DTC Logic INFOID:0000000003388234

I

DTC DETECTION LOGIC

To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored so it will J
not shift to LEAN side or RICH side.

DTC No. Trouble diagnosis name DTC detecting condition Possible Cause K
Air fuel ratio (A/F) sensor 1 The output voltage computed by ECM from the
P2A00 (bank 1) circuit range/per- A/F sensor 1
A/F sensor 1 signal shifts to the lean side for a
formance A/F sensor 1 heater
specified period. L
Fuel pressure
Air fuel ratio (A/F) sensor 1 The A/F signal computed by ECM from the A/F
Fuel injector
P2A03 (bank 2) circuit range/per- sensor 1 signal is shifts to the rich side for a
Intake air leakage
formance specified period.
M
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING N
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON. O
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle. P

>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. Turn ignition switch OFF and wait at least 10 seconds.

Revision: 2008 October EC-427 2009 Murano

 P2A00, P2A03 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for 1 minute under no load.
6. Let engine idle for 1 minute.
7. Keep engine speed between 2,500 and 3,000 rpm for 20 minutes.
8. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-428, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388235

1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.RETIGHTEN A/F SENSOR 1
Loosen and retighten the A/F sensor 1. Refer to EM-34, "Removal and Installation".

>> GO TO 3.
3.CHECK FOR INTAKE AIR LEAKAGE
1. Start engine and run it at idle.
2. Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
YES >> GO TO 4.
NO >> Repair or replace malfunctioning part.
4.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
1. Clear the mixture ratio self-learning value. Refer to EC-19, "MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement".
2. 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 >> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-226, "DTC Logic"
or EC-231, "DTC Logic".
NO >> GO TO 5.
5.CHECK HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect A/F sensor 1 harness connector.
3. Check harness connector for water.

Water should not exit.

Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace harness connector.
6.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect A/F sensor 1 harness connector.
2. Turn ignition switch ON.
3. Check the voltage between A/F sensor 1 harness connector and ground.

Revision: 2008 October EC-428 2009 Murano

 P2A00, P2A03 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]

A/F sensor A
DTC Ground Voltage (V)
Bank Connector Terminal
P2A00 1 F27 4
Ground Battery voltage EC
P2A03 2 F64 4
Is the inspection result normal?
YES >> GO TO 8. C
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
D
Check the following.
IPDM E/R harness connector F12
15 A fuse (No. 46)
Harness for open or short between A/F sensor 1 and IPDM E/R E

>> Repair or replace harness or connectors.

F
8.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector. G
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

A/F sensor 1 ECM H

DTC Continuity
Bank Connector Terminal Connector Terminal
1 45
P2A00 1 F27
2 49 I
Existed
F8
1 53
P2A03 2 F64
2 57
J
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
K
A/F sensor 1
DTC Ground Continuity
Bank Connector Terminal
1 L
P2A00 1 F27
2
Ground Not existed
1
P2A03 2 F64 M
2

ECM N
DTC Ground Continuity
Connector Terminal
45
P2A00 O
49
F8 Ground Not existed
53
P2A03
57 P
5. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
9.CHECK INTERMITTENT INCIDENT

Revision: 2008 October EC-429 2009 Murano

 P2A00, P2A03 A/F SENSOR 1
< COMPONENT DIAGNOSIS > [VQ35DE]
Perform GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair or replace malfunctioning part.
10.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
Discard any A/F 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 A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

>> INSPECTION END

Revision: 2008 October EC-430 2009 Murano

 ASCD BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
ASCD BRAKE SWITCH
A
Description INFOID:0000000003591756

When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON. EC
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
Refer to EC-51, "System Diagram" for the ASCD function.
Component Function Check INFOID:0000000003388237 C

1.CHECK ASCD BRAKE SWITCH FUNCTION

With CONSULT-III D
1. Turn ignition switch ON.
2. Select BRAKE SW1 in DATA MONITOR mode with CONSULT-III.
3. Check BRAKE SW1 indication under the following conditions. E

Monitor item Condition Indication

Slightly depressed OFF F
BRAKE SW1 Brake pedal
Fully released ON

Without CONSULT-III G
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals.
H
ECM
+ Condition Voltage
Connector
Terminal Terminal I
110 Slightly depressed Approx. 0 V
E16 (ASCD brake 112 Brake pedal
switch signal) Fully released Battery voltage
J
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-431, "Diagnosis Procedure". K
Diagnosis Procedure INFOID:0000000003388238

1.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT L

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON. M
4. Check the voltage between ASCD brake switch harness connector and ground.

ASCD brake switch

N
Ground Voltage
Connector Terminal
E49 1 Ground Battery voltage
O
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2. P
2.DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E103
10 A fuse (No.3)
Harness for open or short between ASCD brake switch and fuse

Revision: 2008 October EC-431 2009 Murano

 ASCD BRAKE SWITCH
< COMPONENT DIAGNOSIS > [VQ35DE]
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.

ASCD brake switch ECM

Continuity
Connector Terminal Connector Terminal
E49 2 E16 110 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK ASCD BRAKE SWITCH
Refer to EC-432, "Component Inspection (ASCD Brake Switch)".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace ASCD brake switch.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection (ASCD Brake Switch) INFOID:0000000003591752

1.CHECK ASCD BRAKE SWITCH-I

1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Check the continuity between ASCD brake switch terminals under the following conditions.

Terminals Condition Continuity

Fully released Existed
1 and 2 Brake pedal
Slightly depressed Not existed
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK ASCD BRAKE SWITCH-II
1. Adjust ASCD brake switch installation. Refer to BR-9, "Inspection and Adjustment".
2. Check the continuity between ASCD brake switch terminals under the following conditions.

Terminals Condition Continuity

Fully released Existed
1 and 2 Brake pedal
Slightly depressed Not existed
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace ASCD brake switch.

Revision: 2008 October EC-432 2009 Murano

 ASCD INDICATOR
< COMPONENT DIAGNOSIS > [VQ35DE]
ASCD INDICATOR
A
Description INFOID:0000000003388241

ASCD indicator lamp illuminates to indicate ASCD operation status. CRUISE is integrated in combination EC
meter.
CRUISE illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that ASCD system
is ready for operation.
Refer to EC-51, "System Diagram" for the ASCD function. C

Component Function Check INFOID:0000000003388242

D
1.CHECK ASCD INDICATOR FUNCTION
Check ASCD indicator under the following conditions.
E
ASCD INDICATOR CONDITION SPECIFICATION
MAIN switch: Pressed at the
CRUISE Ignition switch: ON ON OFF
1st time at the 2nd time
F
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-433, "Diagnosis Procedure". G
Diagnosis Procedure INFOID:0000000003388243

1.CHECK DTC H

Check that DTC UXXXX is not displayed.

Is the inspection result normal? I
YES >> GO TO 2.
NO >> Perform trouble diagnosis for DTC UXXXX.
2.CHECK COMBINATION METER FUNCTION J
Refer to MWI-34, "CONSULT-III Function (METER/M&A)".
Is the inspection result normal?
K
YES >> GO TO 3.
NO >> Repair or replace malfunctioning part.
3.CHECK INTERMITTENT INCIDENT L
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> Replace combination meter. M
NO >> Repair or replace malfunctioning part.

Revision: 2008 October EC-433 2009 Murano

 COOLING FAN
< COMPONENT DIAGNOSIS > [VQ35DE]
COOLING FAN
Description INFOID:0000000003388244

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
COOLING FAN MOTOR
The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.

Cooling fan motor terminals

Cooling fan speed
(+) ()
1 3 and 4
2 3 and 4
Middle (MID)
1 and 2 3
1 and 2 4
High (HI) 1 and 2 3 and 4
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under
the middle speed condition.
Refer to EC-60, "System Diagram".
Component Function Check INFOID:0000000003388245

1.CHECK COOLING FAN FUNCTION

With CONSULT-III
1. Turn ignition switch ON.
2. Perform COOLING FAN in ACTIVE TEST mode with CONSULT-III.
3. Check that cooling fan operates at each speed.
Without CONSULT-III
1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PCS-10, "Diagnosis
Description".
2. Check that cooling fan operates at each speed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-434, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388246

1.CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect cooling fan relays-2, -3.
3. Turn ignition switch ON.
4. Check the voltage between cooling fan relays-2, -3 harness connectors and ground.

Cooling fan relay

Ground Voltage
Connector Terminal

E57 2
(cooling fan relay-2) 5
Ground Battery voltage
E59 2
(cooling fan relay-3) 5
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.

Revision: 2008 October EC-434 2009 Murano

 COOLING FAN
< COMPONENT DIAGNOSIS > [VQ35DE]

2.DETECT MALFUNCTIONING PART A

Check the following.
40 A fusible link (letter K)
10 A fuse (No. 42)
EC
IPDM E/R harness connector E10
Harness for open or short between cooling fan relay-2 and battery
Harness for open or short between cooling fan relay-3 and battery
Harness for open or short between cooling fan relay-2 and IPDM E/R C
Harness for open or short between cooling fan relay-3 and IPDM E/R

>> Repair open circuit, short to ground or short to power in harness or connectors. D
3.CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF. E
2. Disconnect IPDM E/R harness connectors.
3. Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connec-
tor.
F
Cooling fan relay IPDM E/R
Continuity
Connector Terminal Connector Terminal
G
E57
1 E11 42
(cooling fan relay-2)
Existed
E59 H
1 E10 34
(cooling fan relay-3)
4. Also check harness for short to ground and short to power.
Is the inspection result normal? I
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT J
1. Disconnect cooling fan motor-1 harness connector.
2. Check the voltage between cooling fan motor-1 harness connector and ground.
K
Cooling fan motor-1
Ground Voltage
Connector Terminal
L
1
E301 Ground Battery voltage
2
Is the inspection result normal? M
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART N

Check the following.

Harness connector E70, E305
O
40 A fusible link (letter M)
Harness for open or short between cooling fan motor-1 and battery

P
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK COOLING FAN MOTOR CIRCUIT-I
1. Disconnect cooling fan motor-2 harness connector.
2. Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 har-
ness connectors.

Revision: 2008 October EC-435 2009 Murano

 COOLING FAN
< COMPONENT DIAGNOSIS > [VQ35DE]

Cooling fan relay Cooling fan motor

Continuity
Connector Terminal Connector Terminal
E302
3 2
E57 (Cooling fan motor-2)
(cooling fan relay-2) E301
7 3
(Cooling fan motor-1)
Existed
E302
3 1
E59 (Cooling fan motor-2)
(cooling fan relay-3) E301
7 4
(Cooling fan motor-1)
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
Harness connector E70, E305
Harness for open or short between cooling fan motor-1 and cooling fan relay-2
Harness for open or short between cooling fan motor-1 and cooling fan relay-3
Harness for open or short between cooling fan motor-2 and cooling fan relay-2
Harness for open or short between cooling fan motor-2 and cooling fan relay-3

>> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK COOLING FAN MOTOR CIRCUIT-II
1. Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connec-
tor.

IPDM E/R Cooling fan motor

Continuity
Connector Terminal Connector Terminal
E301
35 4
(Cooling fan motor-1)
E10 Existed
E302
38 1
(Cooling fan motor-2)
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
Harness connector E70, E305
Harness for open or short between cooling fan motor-1 and IPDM E/R
Harness for open or short between cooling fan motor-2 and IPDM E/R

>> Repair open circuit, short to ground or short to power in harness or connectors.
10.CHECK COOLING FAN MOTOR CIRCUIT-III
1. Check the continuity between cooling fan relay-2, -3 harness connectors and ground.

Revision: 2008 October EC-436 2009 Murano

 COOLING FAN
< COMPONENT DIAGNOSIS > [VQ35DE]

Cooling fan motor A

Ground Continuity
Connector Terminal
E57
6 EC
(cooling fan relay-2)
Ground Existed
E59
6
(cooling fan relay-3)
C
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 11. D
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
11.CHECK COOLING FAN MOTOR CIRCUIT-IV
1. Check the continuity between cooling fan motor-2 harness connector and ground. E

Cooling fan motor-2

Ground Continuity F
Connector Terminal
3
E302 Ground Existed
4 G
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 12. H
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
12.CHECK COOLING FAN RELAYS-2 AND -3 I
Refer to EC-438, "Component Inspection (Cooling Fan Relay)".
Is the inspection result normal?
YES >> GO TO 13. J
NO >> Replace malfunctioning cooling fan relay.
13.CHECK COOLING FAN MOTORS-1 AND -2
K
Refer to EC-437, "Component Inspection (Cooling Fan Motor)".
Is the inspection result normal?
YES >> GO TO 14. L
NO >> Replace malfunctioning cooling fan motor.
14.CHECK INTERMITTENT INCIDENT
Perform GI-40, "Intermittent Incident". M
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> Repair or replace harness connectors. N

Component Inspection (Cooling Fan Motor) INFOID:0000000003388247

1.CHECK COOLING FAN MOTOR O

1. Turn ignition switch OFF.

2. Disconnect cooling fan motor harness connector. P
3. Supply cooling fan motor terminals with battery voltage and check operation.

Revision: 2008 October EC-437 2009 Murano

 COOLING FAN
< COMPONENT DIAGNOSIS > [VQ35DE]

Terminals
Condition
(+) ()
1 3 and 4
2 3 and 4
A
Cooling fan motor 1 and 2 3
1 and 2 4
B 1, 2 3, 4
Check that cooling fan speed of condition B is higher than that of A.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan motor.
Component Inspection (Cooling Fan Relay) INFOID:0000000003388248

1.CHECK COOLING FAN RELAY

1. Disconnect cooling fan relays -2, -3 harness connectors.
2. Check continuity between cooling fan relay -2, -3 terminals
under the following conditions.

Terminals Conditions Continuity

3 and 5 12 V direct current supply between terminals 1 and 2 Existed

6 and 7 No current supply Not existed
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan relay.
SEF745U

Revision: 2008 October EC-438 2009 Murano

 ELECTRICAL LOAD SIGNAL
< COMPONENT DIAGNOSIS > [VQ35DE]
ELECTRICAL LOAD SIGNAL
A
Description INFOID:0000000003388249

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via EC
the CAN communication.
Component Function Check INFOID:0000000003388250

C
1.CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1. Turn ignition switch ON.
2. Connect CONSULT-III and select DATA MONITOR mode. D
3. Select LOAD SIGNAL and check indication under the following conditions.

Monitor item Condition Indication E

ON ON
LOAD SIGNAL Rear window defogger switch
OFF OFF
F
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to EC-439, "Diagnosis Procedure". G
2.CHECK LIGHTING SWITCH FUNCTION
Check LOAD SIGNAL indication under the following conditions.
H
Monitor item Condition Indication
ON at 2nd position ON
LOAD SIGNAL Lighting switch I
OFF OFF
Is the inspection result normal?
YES >> GO TO 3. J
NO >> Go to EC-439, "Diagnosis Procedure".
3.CHECK HEATER FAN CONTROL SWITCH FUNCTION
K
Select HEATER FAN SW and check indication under the following conditions.

Monitor item Condition Indication L

ON ON
HEATER FAN SW Heater fan control switch
OFF OFF
Is the inspection result normal? M
YES >> INSPECTION END
NO >> Go to EC-439, "Diagnosis Procedure".
N
Diagnosis Procedure INFOID:0000000003388251

1.INSPECTION START O
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-439, "Compo-
nent Function Check".
Which circuit is related to the incident? P
Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to DEF-3, "Work Flow".

Revision: 2008 October EC-439 2009 Murano

 ELECTRICAL LOAD SIGNAL
< COMPONENT DIAGNOSIS > [VQ35DE]
>> INSPECTION END
3.CHECK HEADLAMP SYSTEM
Refer to EXL-6, "Work Flow" (XENON TYPE) or EXL-189, "Work Flow" (HALOGEN TYPE).

>> INSPECTION END

4.CHECK HEATER FAN CONTROL SYSTEM
Refer to VTL-5, "System Description".

>> INSPECTION END

Revision: 2008 October EC-440 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< COMPONENT DIAGNOSIS > [VQ35DE]
ELECTRONIC CONTROLLED ENGINE MOUNT
A
Description INFOID:0000000003388252

The electronic controlled engine mount control solenoid valve controls the intake manifold vacuum signal for EC
electronic controlled engine mount. The electronic controlled engine mount control solenoid valve is moved by
ON/OFF signal from the ECM. When the solenoid is OFF, the vacuum signal from the intake manifold is cut.
When the solenoid is ON, the intake manifold vacuum signal is sent to the electronic controlled engine mount.
C
Component Function Check INFOID:0000000003388253

1.CHECK OVERALL FUNCTION D

1. Start engine and warm it up to normal operating temperature.
2. Shift selector position is D while depressing the brake pedal and parking brake pedal.
3. Disconnect electronic controlled engine mount control solenoid valve harness connector. E
4. Check that body vibration increases compared to the condition of step 2 above (with vehicle stopped).
Is the inspection result normal?
YES >> INSPECTION END F
NO >> EC-441, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388254

G
1.CHECK VACUUM SOURCE
1. Turn ignition switch OFF.
2. Reconnect electronic controlled engine mount control solenoid valve harness connector. H
3. Disconnect vacuum hose connected to electronic controlled engine mount.
4. Start engine and let it idle.
5. Check vacuum hose for vacuum existence. I

Vacuum should exist.

Is the inspection result normal? J
YES >> GO TO 7.
NO >> GO TO 2.
2.CHECK VACUUM HOSES AND VACUUM GALLERY K

1. Turn ignition switch OFF.

2. Check vacuum hoses and vacuum gallery for clogging, cracks or improper connection. Refer to EC-68,
"System Diagram". L
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace vacuum hoses and vacuum gallery. M

3.CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE POWER SUPPLY
CIRCUIT N
1. Disconnect electronic controlled engine mount control solenoid valve harness connector.
2. Turn ignition switch ON.
3. Check the voltage between front electronic controlled engine mount harness connector and ground. O

Electronic controlled engine mount

control solenoid valve Ground Voltage P
Connector Terminal
F11 1 Ground Battery voltage
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Revision: 2008 October EC-441 2009 Murano
 ELECTRONIC CONTROLLED ENGINE MOUNT
< COMPONENT DIAGNOSIS > [VQ35DE]
Check the following.
Harness connectors E6, F123
10 A fuse (No. 3)
Fuse block (J/B) connector E103
Harness for open or short between electronic controlled engine mount control solenoid valve and fuse

>> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE OUTPUT SIG-
NAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check the continuity between ECM harness connector and electronic controlled engine mount control
solenoid valve harness connector.

Electronic controlled engine

ECM
mount control solenoid valve Continuity
Connector Terminal Connector Terminal
F7 28 F11 2 Existed
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair open circuit, short to ground or short to power in harness connectors.
6.CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE
Refer to EC-442, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace electronic controlled engine mount control solenoid valve.
7.CHECK ELECTRONIC CONTROLLED ENGINE MOUNT
1. Turn ignition switch OFF.
2. Install vacuum pump (A) to electronic controlled engine mount
(1).
3. Check that a vacuum is maintained when applying the vacuum
of -40 kPa (-0.41 kg/cm2, -5.8 psi) to electronic controlled engine
mount.
4. Also visually check electronic controlled engine mount.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Replace electronic controlled engine mount.
MBIB1237E

8.CHECK INTERMITTENT INCIDENT

Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> Replace intake manifold collector.
NO >> Repair or replace malfunctioning part.
Component Inspection INFOID:0000000003388255

1.CHECK ELECTRONIC CONTROLLED ENGINE MOUNT CONTROL SOLENOID VALVE

With CONSULT-III
1. Turn ignition switch OFF.
2. Reconnect electronic controlled engine mount control solenoid valve harness connector.
3. Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.
4. Turn ignition switch ON.

Revision: 2008 October EC-442 2009 Murano

 ELECTRONIC CONTROLLED ENGINE MOUNT
< COMPONENT DIAGNOSIS > [VQ35DE]
5. Select ENGINE MOUNTING in ACTIVE TEST mode with CONSULT-III.
6. Check air passage continuity and operation delay time under the A
following conditions.

Condition Air passage continuity Air passage continuity EC

(ENGINE MOUNTING) between (A) and (B) between (A) and (C)
TRVL Existed Not existed
IDLE Not existed Existed C
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect electronic controlled engine mount control solenoid JMBIA0180ZZ D
valve harness connector.
3. Disconnect vacuum hoses connected to electronic controlled engine mount control solenoid valve.
4. Check air passage continuity and operation delay time under the E
following conditions.

Air passage continuity Air passage continuity F

Condition
between (A) and (B) between (A) and (C)
12 V direct current supply be-
Existed Not existed
tween terminals 1 and 2
G
No supply Not existed Existed
Is the inspection result normal?
YES >> INSPECTION END PBIB2532E H
NO >> Replace electronic controlled engine mount control sole-
noid valve.
I

Revision: 2008 October EC-443 2009 Murano

 FUEL INJECTOR
< COMPONENT DIAGNOSIS > [VQ35DE]
FUEL INJECTOR
Description INFOID:0000000003388256

The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.

PBIA9664J

Component Function Check INFOID:0000000003388257

1.INSPECTION START
Turn ignition switch to START.
Are any cylinders ignited?
YES >> GO TO 2.
NO >> Go to EC-444, "Diagnosis Procedure".
2.CHECK FUEL INJECTOR FUNCTION
With CONSULT-III
1. Start engine.
2. Perform POWER BALANCE in ACTIVE TEST mode with CONSULT-III.
3. Check that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Start engine.
2. Listen to each fuel injector operating sound.

Clicking sound should be heard.

Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-444, "Diagnosis Procedure".

PBIB3332E

Diagnosis Procedure INFOID:0000000003388258

1.CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
4. Check the voltage between fuel injector harness connector and ground.

Revision: 2008 October EC-444 2009 Murano

 FUEL INJECTOR
< COMPONENT DIAGNOSIS > [VQ35DE]

Fuel injector A
Ground Voltage
Cylinder Connector Terminal
1 F37 1
EC
2 F38 1
3 F39 1
Ground Battery voltage
4 F40 1 C
5 F41 1
6 F42 1
D
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2. E
2.DETECT MALFUNCTIONING PART
Check the following.
10 A fuse (No.44) F
IPDM E/R harness connector F12
Harness for open or short between fuel injector and IPDM E/R
G
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
H
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between fuel injector harness connector and ECM harness connector.
I
Fuel injector ECM
Continuity
Cylinder Connector Terminal Connector Terminal
J
1 F37 2 32
2 F38 2 31
3 F39 2 30 K
F7 Existed
4 F40 2 29
5 F41 2 3
L
6 F42 2 1
4. Also check harness for short to ground and short to power.
Is the inspection result normal? M
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK FUEL INJECTOR N

Refer to EC-446, "Component Inspection".

Is the inspection result normal? O
YES >> GO TO 5.
NO >> Replace malfunctioning fuel injector.
5.CHECK INTERMITTENT INCIDENT P
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> INSPECTION END

Revision: 2008 October EC-445 2009 Murano

 FUEL INJECTOR
< COMPONENT DIAGNOSIS > [VQ35DE]
Component Inspection INFOID:0000000003388259

1.CHECK FUEL INJECTOR

1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Check resistance between fuel injector terminals as per the fol-
lowing.

Terminals Resistance
1 and 2 11.1 - 14.5 [at 10 - 60C (50 - 140F)]
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace malfunctioning fuel injector.

PBIB1727E

Revision: 2008 October EC-446 2009 Murano

 FUEL PUMP
< COMPONENT DIAGNOSIS > [VQ35DE]
FUEL PUMP
A
Description INFOID:0000000003388260

EC
Sensor Input signal to ECM ECM Function Actuator
Crankshaft position sensor (POS) Fuel pump relay
Engine speed*
Camshaft position sensor (PHASE) Fuel pump control C
Battery Battery voltage* Fuel pump

*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine D
start ability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
E
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.

Condition Fuel pump operation F

Ignition switch is turned to ON. Operates for 1 second.
Engine running and cranking Operates.
G
When engine is stopped Stops in 1.5 seconds.
Except as shown above Stops.
H
Component Function Check INFOID:0000000003388261

1.CHECK FUEL PUMP FUNCTION I

1. Turn ignition switch ON.
2. Pinch fuel feed hose with two fingers.
- : Vehicle front (Illustration shows the view with intake air duct J
removed)

Fuel pressure pulsation should be felt on the fuel feed

hose for 1 second after ignition switch is turned ON. K

Is the inspection result normal?

YES >> INSPECTION END L
NO >> EC-447, "Diagnosis Procedure".
JMBIA1131ZZ

Diagnosis Procedure INFOID:0000000003388262 M

1.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I

1. Turn ignition switch OFF. N
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ECM harness connector terminals. O

ECM
+ Voltage P
Connector Terminal Connector Terminal
F7 14 E16 112 Battery voltage
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.

Revision: 2008 October EC-447 2009 Murano

 FUEL PUMP
< COMPONENT DIAGNOSIS > [VQ35DE]

2.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II

Check the voltage between IPDM E/R harness connector and ground.

IPDM E/R
Ground Voltage
Connector Terminal
F12 77 Ground Battery voltage
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 16.
3.DETECT MALFUNCTIONING PART
Check the following.
IPDM E/R harness connector F12
Harness for open or short between IPDM E/R and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK CONDENSER POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect condenser harness connector.
4. Turn ignition switch ON.
5. Check the voltage between condenser harness connector and ground.

Condenser
Ground Voltage
Connector Terminal
Battery voltage should exist for 1 second
B81 1 Ground
after ignition switch is turned ON.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 5.
5.CHECK 15 A FUSE
1. Turn ignition switch OFF.
2. Disconnect 15 A fuse (No. 41).
3. Check 15 A fuse.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace fuse.
6.CHECK CONDENSER POWER SUPPLY CIRCUIT-II
1. Disconnect IPDM E/R harness connector.
2. Check the continuity between IPDM E/R harness connector and condenser harness connector.

IPDM E/R Condenser

Continuity
Connector Terminal Connector Terminal
E10 13 B81 1 Existed
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 16.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART

Revision: 2008 October EC-448 2009 Murano

 FUEL PUMP
< COMPONENT DIAGNOSIS > [VQ35DE]
Check the following.
Harness connectors E104, B4 A
IPDM E/R connector E10
Harness for open or short between IPDM E/R and condenser
EC
>> Repair open circuit or short to power in harness or connectors.
8.CHECK CONDENSER GROUND CIRCUIT
C
1. Turn ignition switch OFF.
2. Check the continuity between condenser harness connector and ground.

D
Condenser
Ground Continuity
Connector Terminal
B81 2 Ground Existed E
3. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 10. F
NO >> GO TO 9.
9.DETECT MALFUNCTIONING PART G
Check the following.
Harness connectors B4, E104 (with rear view monitor)
Harness for open or short between condenser and ground
H

>> Repair open circuit or short to power in harness or connectors.

10.CHECK CONDENSER I
Refer to EC-450, "Component Inspection (Condenser)".
Is the inspection result normal?
J
YES >> GO TO 11.
NO >> Replace condenser.
11.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III K
1. Disconnect fuel level sensor unit and fuel pump harness connector.
2. Check harness continuity between IPDM E/R harness connector and fuel level sensor unit and fuel
pump harness connector. L

Fuel level sensor unit and fuel

IPDM E/R
pump Continuity M
Connector Terminal Connector Terminal
E10 13 B40 1 Existed
Is the inspection result normal? N
YES >> GO TO 13.
NO >> GO TO 12.
12.DETECT MALFUNCTIONING PART O

Check the following.

Harness connectors B4, E104
P
Harness for open or short between fuel level sensor unit and fuel pump and IPDM E/R

>> Repair open circuit or short to power in harness or connectors.

13.CHECK FUEL PUMP GROUND CIRCUIT
1. Disconnect fuel level sensor unit and fuel pump harness connector.
2. Check the continuity between fuel level sensor unit and fuel pump harness connector and ground.

Revision: 2008 October EC-449 2009 Murano

 FUEL PUMP
< COMPONENT DIAGNOSIS > [VQ35DE]

Fuel level sensor unit and fuel

pump Ground Continuity
Connector Terminal
B40 3 Ground Existed
Is the inspection result normal?
YES >> GO TO 15.
NO >> GO TO 14.
14.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors B4, E104 (with rear view monitor)
Harness for open or short between fuel level sensor unit and fuel pump and ground

>> Repair open circuit or short to power in harness or connectors.

15.CHECK FUEL PUMP
Refer to EC-450, "Component Inspection (Fuel Pump)".
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace fuel pump.
16.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> Repair or replace harness or connectors.
Component Inspection (Fuel Pump) INFOID:0000000003388263

1.CHECK FUEL PUMP

1. Turn ignition switch OFF.
2. Disconnect fuel level sensor unit and fuel pump harness connector.
3. Check resistance between fuel level sensor unit and fuel pump terminals as per the following.

Terminals Resistance
1 and 3 0.2 - 5.0 [at 25C (77F)]
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace fuel level sensor unit and fuel pump
Component Inspection (Condenser) INFOID:0000000003388264

1.CHECK CONDENSER
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminals as per the following.

Terminals Resistance
1 and 2 Above 1 M [at 25C (77F)]
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace condenser.

Revision: 2008 October EC-450 2009 Murano

 IGNITION SIGNAL
< COMPONENT DIAGNOSIS > [VQ35DE]
IGNITION SIGNAL
A
Description INFOID:0000000003388265

The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns EC
ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil
secondary circuit.
Component Function Check INFOID:0000000003388266 C

1.INSPECTION START
Turn ignition switch OFF, and restart engine. D
Does the engine start?
YES-1 >> With CONSULT-III: GO TO 2.
YES-2 >> Without CONSULT-III: GO TO 3. E
NO >> Go to EC-451, "Diagnosis Procedure".
2.CHECK IGNITION SIGNAL FUNCTION
F
With CONSULT-III
1. Perform POWER BALANCE in ACTIVE TEST mode with CONSULT-III.
2. Check that each circuit produces a momentary engine speed drop.
G
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-451, "Diagnosis Procedure". H
3.CHECK IGNITION SIGNAL FUNCTION
Without CONSULT-III
1. Let engine idle. I
2. Read the voltage signal between ECM harness connector terminals with an oscilloscope.

ECM J
+ Voltage signal
Connector Terminal Connector Terminal
K
9
10
11 L
F7 E16 112
18
19
M
21 JMBIA0035GB

NOTE:
The pulse cycle changes depending on rpm at idle. N
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-451, "Diagnosis Procedure". O
Diagnosis Procedure INFOID:0000000003388267

1.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I P

1. Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
2. Check the voltage between ECM harness connector terminals.

Revision: 2008 October EC-451 2009 Murano

 IGNITION SIGNAL
< COMPONENT DIAGNOSIS > [VQ35DE]

ECM
+ Voltage
Connector
Terminal Terminal
E16 105 112 Battery voltage
Is the inspection result normal?
YES >> GO TO 2.
NO >> Refer to EC-135, "Diagnosis Procedure".
2.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Turn ignition switch ON.
4. Check the voltage between condenser harness connector and ground.

Condenser
Ground Voltage
Connector Terminal
F13 1 Ground Battery voltage
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between IPDM E/R harness connector and condenser harness connector.

IPDM E/R Condenser

Continuity
Connector Terminal Connector Terminal
F12 49 F13 1 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> Refer to EC-135, "Diagnosis Procedure".
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check the continuity between condenser harness connector and ground.

Condenser
Ground Continuity
Connector Terminal
F13 2 Ground Existed
3. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair open circuit or short to power in harness or connectors.
5.CHECK CONDENSER
Refer to EC-455, "Component Inspection (Condenser)"
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace condenser.

Revision: 2008 October EC-452 2009 Murano

 IGNITION SIGNAL
< COMPONENT DIAGNOSIS > [VQ35DE]

6.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V A

1. Reconnect all harness connectors disconnected.
2. Disconnect ignition coil harness connector.
3. Turn ignition switch ON.
EC
4. Check the voltage between ignition coil harness connector and ground.

Ignition coil
Ground Voltage C
Cylinder Connector Terminal
1 F31 3
2 F32 3 D
3 F33 3
Ground Battery voltage
4 F34 3
E
5 F35 3
6 F36 3
Is the inspection result normal? F
YES >> GO TO 7.
NO >> Repair or replace harness or connectors.
7.CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT G
1. Turn ignition switch OFF.
2. Check the continuity between ignition coil harness connector and ground.
H

Ignition coil
Ground Continuity
Cylinder Connector Terminal I
1 F31 2
2 F32 2
3 F33 2 J
Ground Existed
4 F34 2
5 F35 2
K
6 F36 2
3. Also check harness for short to power.
Is the inspection result normal? L
YES >> GO TO 8.
NO >> Repair open circuit or short to power in harness or connectors.
8.CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT M

1. Disconnect ECM harness connector.

2. Check the continuity between ignition coil harness connector and ECM harness connector.
N

Ignition coil ECM

Continuity
Cylinder Connector Terminal Connector Terminal O
1 F31 1 11
2 F32 1 10
3 F33 1 9 P
F7 Existed
4 F34 1 21
5 F35 1 19
6 F36 1 18
3. Also check harness for short to ground and short to power.
Is the inspection result normal?

Revision: 2008 October EC-453 2009 Murano

 IGNITION SIGNAL
< COMPONENT DIAGNOSIS > [VQ35DE]
YES >> GO TO 9.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
9.CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to EC-454, "Component Inspection (Ignition Coil with Power Transistor)".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Replace malfunctioning ignition coil with power transistor.
10.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END

Component Inspection (Ignition Coil with Power Transistor) INFOID:0000000003388268

1.CHECK IGNITION COIL WITH POWER TRANSISTOR-I

1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
3. Check resistance between ignition coil terminals as per the following.

Terminal No. (Polarity) Resistance [at 25C (77F)]

1 and 2 Except 0 or
1 and 3
Except 0
2 and 3
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace malfunctioning ignition coil with power transistor.
2.CHECK IGNITION COIL WITH POWER TRANSISTOR-II
CAUTION:
Perform the following procedure in a place with no combustible objects and good ventilation.
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pressure applies again during the following pro-
cedure.
4. Start engine.
5. After engine stalls, crank it 2 or 3 times to release all fuel pressure.
6. Turn ignition switch OFF.
7. Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
8. Remove ignition coil and spark plug of the cylinder to be checked.
9. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
10. Connect spark plug and harness connector to ignition coil.
11. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
12. Crank engine for approximately 3 seconds, and check whether
spark is generated between the spark plug and the grounded
metal portion.

Spark should be generated.

CAUTION:
During the operation, always stay 0.5 m (19.7 in) or more
away from the spark plug and the ignition coil. Be careful JMBIA0066GB

Revision: 2008 October EC-454 2009 Murano

 IGNITION SIGNAL
< COMPONENT DIAGNOSIS > [VQ35DE]
not to get an electrical shock while checking, because the electrical discharge voltage becomes
20 kV or more. A
It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
EC
functioning.
Is the inspection result normal?
YES >> INSPECTION END
C
NO >> Replace malfunctioning ignition coil with power transistor.
Component Inspection (Condenser) INFOID:0000000003388269

D
1.CHECK CONDENSER
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector. E
3. Check resistance between condenser terminals as per the following.

Terminals Resistance F
1 and 2 Above 1 M [at 25C (77C)]
Is the inspection result normal?
G
YES >> INSPECTION END
NO >> Replace condenser.
H

Revision: 2008 October EC-455 2009 Murano

 MALFUNCTION INDICATOR LAMP
< COMPONENT DIAGNOSIS > [VQ35DE]
MALFUNCTION INDICATOR LAMP
Description INFOID:0000000003388270

The Malfunction Indicator Lamp (MIL) is located on the combination

meter.
The MIL will illuminate when the ignition switch is turned ON without
the engine running. This is a bulb check.
When the engine is started, the MIL should turn off. If the MIL
remains on, the on board diagnostic system has detected an engine
system malfunction.
For details, refer to EC-102, "Diagnosis Description".

SEF217U

Component Function Check INFOID:0000000003388271

1.CHECK MIL FUNCTION

1. Turn ignition switch ON.
2. Check that MIL illuminates.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-456, "Diagnosis Procedure".
Diagnosis Procedure INFOID:0000000003388272

1.CHECK DTC
Check that DTC UXXXX is not displayed.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble diagnosis for DTC UXXXX.
2.CHECK COMBINATION METER FUNCTION
Refer to MWI-34, "CONSULT-III Function (METER/M&A)".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Repair or replace.

Revision: 2008 October EC-456 2009 Murano

 ON BOARD REFUELING VAPOR RECOVERY (ORVR)
< COMPONENT DIAGNOSIS > [VQ35DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
A
Description INFOID:0000000003388273

EC

PBIB1068E

From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut G
valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is
released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and
refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged H
during driving.
WARNING:
When conducting inspections below, be sure to observe the following: I
Put a CAUTION: FLAMMABLE sign in workshop.
Never smoke while servicing fuel system. Keep open flames and sparks away from work area.
Always to furnish the workshop with a CO2 fire extinguisher. J
CAUTION:
Before removing fuel line parts, carry out the following procedures:
- Put drained fuel in an explosion-proof container and put lid on securely.
- Release fuel pressure from fuel line. Refer to EC-545, "Inspection". K
- Disconnect battery ground cable.
Always replace O-ring when the fuel gauge retainer is removed.
Never kink or twist hose and tube when they are installed. L
Never tighten hose and clamps excessively to avoid damaging hoses.
After installation, run engine and check for fuel leakage at connections.
Never attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire. M

Component Function Check INFOID:0000000003388274

N
1.CHECK ORVR FUNCTION
Check whether the following symptoms are present.
Fuel odor from EVAP canister is strong. O
Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.
Are any symptoms present?
YES >> Go to EC-457, "Diagnosis Procedure". P
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000003388275

1.INSPECTION START
Check whether the following symptoms are present.
A: Fuel odor from EVAP canister is strong.

Revision: 2008 October EC-457 2009 Murano

 ON BOARD REFUELING VAPOR RECOVERY (ORVR)
< COMPONENT DIAGNOSIS > [VQ35DE]
B: Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.
A or B
A >> GO TO 2.
B >> GO TO 7.
2.CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
Check if water will drain from EVAP canister
Does water drain from the EVAP canister?
YES >> GO TO 4.
NO >> GO TO 6.

JMBIA1134GB

4.REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose.

6.CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to EC-460, "Component Inspection".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace refueling EVAP vapor cut valve with fuel tank.
7.CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 9.
8.CHECK IF EVAP CANISTER IS SATURATED WITH WATER

Revision: 2008 October EC-458 2009 Murano

 ON BOARD REFUELING VAPOR RECOVERY (ORVR)
< COMPONENT DIAGNOSIS > [VQ35DE]
Check if water will drain from EVAP canister.
Does water drain from the EVAP canister? A
YES >> GO TO 6.
NO >> GO TO 11.
EC

JMBIA1134GB

9.REPLACE EVAP CANISTER D

Replace EVAP canister with a new one.

E
>> GO TO 10.
10.DETECT MALFUNCTIONING PART
F
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose. G

11.CHECK VENT HOSES AND VENT TUBES
Check hoses and tubes between EVAP canister and refueling control valve for clogging, kinks, looseness and
improper connection. H
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair or replace hoses and tubes. I
12.CHECK FILLER NECK TUBE
Check recirculation line for clogging, dents and cracks. J
Is the inspection result normal?
YES >> GO TO 13.
NO >> Replace filler neck tube. K
13.CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to EC-460, "Component Inspection".
L
Is the inspection result normal?
YES >> GO TO 14.
NO >> Replace refueling EVAP vapor cut valve with fuel tank.
M
14.CHECK FUEL FILLER TUBE
Check filler neck tube and hose connected to the fuel tank for clogging, dents and cracks.
Is the inspection result normal? N
YES >> GO TO 15.
NO >> Replace fuel filler tube.
15.CHECK ONE-WAY FUEL VALVE-I O

Check one-way valve for clogging.

Is the inspection result normal? P
YES >> GO TO 16.
NO >> Repair or replace one-way fuel valve with fuel tank.
16.CHECK ONE-WAY FUEL VALVE-II
1. Check that fuel is drained from the tank.
2. Remove fuel filler tube and hose.

Revision: 2008 October EC-459 2009 Murano

 ON BOARD REFUELING VAPOR RECOVERY (ORVR)
< COMPONENT DIAGNOSIS > [VQ35DE]
3. Check one-way fuel valve for operation as per the following.
When a stick is inserted, the valve should open, when removing
stick it should close.
Do not drop any material into the tank.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace fuel filler tube or replace one-way fuel valve
with fuel tank.

SEF665U

Component Inspection INFOID:0000000003388276

1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK REFUELING EVAP VAPOR CUT VALVE
With CONSULT-III
1. Turn ignition switch OFF.
2. Remove fuel tank. Refer to FL-12, "Removal and Installation".
3. Drain fuel from the tank as per the following:
- Remove fuel feed hose located on the fuel gauge retainer.
- Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other
side to a fuel container.
- Drain fuel using FUEL PUMP RELAY in ACTIVE TEST mode with CONSULT-III.
4. Check refueling EVAP vapor cut valve for being stuck to close as per the following.
Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.
5. Check refueling EVAP vapor cut valve for being stuck to open as per the following.
- Connect vacuum pump to hose end.
- Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.
- Turn fuel tank upside down.
- Apply vacuum pressure to hose end [13.3 kPa (0.136 kg/cm3, 1.93 psi)] with fuel gauge retainer
remaining open and check that the pressure is applicable.

JMBIA1126GB

Is the inspection result normal?

YES >> INSPECTION END
NO >> Replace refueling EVAP vapor cut valve with fuel tank.

Revision: 2008 October EC-460 2009 Murano

 ON BOARD REFUELING VAPOR RECOVERY (ORVR)
< COMPONENT DIAGNOSIS > [VQ35DE]

3.CHECK REFUELING EVAP VAPOR CUT VALVE A

Without CONSULT-III
1. Turn ignition switch OFF.
2. Remove fuel tank. Refer to FL-12, "Removal and Installation". EC
3. Drain fuel from the tank as per the following:
- Remove fuel gauge retainer.
- Drain fuel from the tank using a handy pump into a fuel container.
4. Check refueling EVAP vapor cut valve for being stuck to close as per the following. C
Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.
5. Check refueling EVAP vapor cut valve for being stuck to open as per the following. D
- Connect vacuum pump to hose end.
- Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.
- Turn fuel tank upside down. E
3
- Apply vacuum pressure to hose end [13.3 kPa (0.136 kg/cm , 1.93 psi)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
F

J
JMBIA1126GB

Is the inspection result normal?

YES >> INSPECTION END K
NO >> Replace refueling EVAP vapor cut valve with fuel tank.

Revision: 2008 October EC-461 2009 Murano

 POSITIVE CRANKCASE VENTILATION
< COMPONENT DIAGNOSIS > [VQ35DE]
POSITIVE CRANKCASE VENTILATION
Description INFOID:0000000003388277

SEC921C

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 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 insufficient to draw the blow-by flow through the valve.
The flow goes through the hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.

PBIB1588E

Component Inspection INFOID:0000000003388278

1.CHECK PCV 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.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace PCV valve.

PBIB1589E

Revision: 2008 October EC-462 2009 Murano

 REFRIGERANT PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
REFRIGERANT PRESSURE SENSOR
A
Description INFOID:0000000003388279

The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an EC
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
C

E
PBIB2657E

F
Component Function Check INFOID:0000000003388280

1.CHECK REFRIGERANT PRESSURE SENSOR FUNCTION G

1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.
H

ECM
+ Voltage (V) I
Connector
Terminal Terminal
39 40
F8 1.0 - 4.0
(Refrigerant pressure sensor signal) (Sensor ground) J
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-463, "Diagnosis Procedure". K

Diagnosis Procedure INFOID:0000000003388281

L
1.CHECK GROUND CONNECTION
1. Turn A/C switch and blower fan switch OFF.
2. Turn ignition switch OFF. M
3. Check ground connection E38. Refer to Ground Inspection in GI-43, "Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2. N
NO >> Repair or replace ground connection.
2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector. O
2. Turn ignition switch ON.
3. Check the voltage between refrigerant pressure sensor harness connector and ground.
P
Refrigerant pressure sensor
Ground Voltage (V)
Connector Terminal
E300 1 Ground Approx. 5
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.

Revision: 2008 October EC-463 2009 Murano

 REFRIGERANT PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]

3.DETECT MALFUNCTIONING PART

Check the following.
Harness connectors F123, E6
IPDM E/R harness connectors E10, E346
Harness for open or short between ECM and refrigerant pressure sensor

>> Repair open circuit, 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 the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.

Refrigerant pressure sensor ECM

Continuity
Connector Terminal Connector Terminal
E300 3 F8 40 Existed
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F123, E6
IPDM E/R harness connectors E10, E346
Harness for open or short between ECM and refrigerant pressure sensor

>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.

Refrigerant pressure sensor ECM

Continuity
Connector Terminal Connector Terminal
E300 2 F8 39 Existed
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F123, E6
IPDM E/R harness connectors E10, E346
Harness for open or short between ECM and refrigerant pressure sensor

>> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> Replace refrigerant pressure sensor.

Revision: 2008 October EC-464 2009 Murano

 REFRIGERANT PRESSURE SENSOR
< COMPONENT DIAGNOSIS > [VQ35DE]
NO >> Repair or replace malfunctioning part.
A

EC

Revision: 2008 October EC-465 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
VARIABLE INDUCTION AIR SYSTEM
Description INFOID:0000000003388282

Power Valves 1 and 2

The power valves 1 and 2 are installed in intake manifold collector and used to control the suction passage of
the variable induction air control system. They are set in the fully closed or fully opened position by the power
valve actuators 1 and 2 operated by the vacuum stored in the vacuum tank. The vacuum to power valve actu-
ators is controlled by the VIAS control solenoid valves 1 and 2.
Component Function Check INFOID:0000000003388283

1.CHECK OVERALL FUNCTION-I

With CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Perform VIAS S/V-1 in ACTIVE TEST mode with CONSULT-III.
3. Turn VIAS control solenoid valve 1 ON and OFF, and check that power valve actuator 1 rod moves.

JMBIA1129ZZ

1. Power valve actuator 1 2. Power valve actuator 1 rod 3. Power valve actuator 2
4. Power valve actuator 2 rod
: Vehicle front

Without CONSULT-III
1. Start engine and warm it up to the normal operating temperature.
2. Rev engine quickly up to approximately 5,000 rpm.
3. Check that power valve actuator 1 rod moves.

JMBIA1386ZZ

1. Power valve actuator 1 2. Power valve actuator 1 rod 3. Power valve actuator 2
4. Power valve actuator 2 rod
: Vehicle front

Is the inspection result normal?

YES >> GO TO 2.
NO >> EC-467, "Diagnosis Procedure".
2.CHECK OVERALL FUNCTION-II
With CONSULT-III

Revision: 2008 October EC-466 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]
1. Perform VIAS S/V-2 in ACTIVE TEST mode with CONSULT-III.
2. Turn VIAS control solenoid valve 2 ON and OFF, and check that power valve actuator 2 rod moves. A

EC

D
JMBIA1129ZZ

1. Power valve actuator 1 2. Power valve actuator 1 rod 3. Power valve actuator 2
E
4. Power valve actuator 2 rod
: Vehicle front

Without CONSULT-III F
1. When revving engine up to 5,000 rpm quickly.
2. Rev engine quickly up to approximately 5,000 rpm.
3. Check that power valve actuator 2 rod moves. G

J
JMBIA1386ZZ

1. Power valve actuator 1 2. Power valve actuator 1 rod 3. Power valve actuator 2
4. Power valve actuator 2 rod
K
: Vehicle front

Is the inspection result normal? L

YES >> INSPECTION END
NO >> EC-467, "Diagnosis Procedure".
M
Diagnosis Procedure INFOID:0000000003388284

1.INSPECTION START
N
Confirm the malfunctioning system (power valve 1 or power valve 2). Refer to EC-466, "Component Function
Check".
Which system is related to the incident?
O
Power valve 1>>GO TO 2.
Power valve 2>>GO TO 6.
2.CHECK VACUUM EXISTENCE-I P
With CONSULT-III
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Start engine and let it idle.
3. Perform VIAS S/V-1 in ACTIVE TEST mode with CONSULT-III.
4. Turn VIAS control solenoid valve 1 ON and OFF, and check vacuum existence under the following condi-
tions.

Revision: 2008 October EC-467 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]

VIAS S/V-1 Vacuum

ON Existed
OFF Not existed

Without CONSULT-III
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Start engine.
4. Rev engine quickly up to approximately 5,000 rpm.
5. Check vacuum existence under the following conditions.

Condition Vacuum
Idle Existed
Rev engine quickly up to approximately 5,000 rpm Not existed
Is the inspection result normal?
YES >> Repair or replace power valve actuator 1.
NO >> GO TO 3.
3.CHECK VACUUM TANK
1. Stop engine and disconnect vacuum hose connected to intake manifold collector.
2. Start engine and let it idle.
3. Check vacuum existence from intake manifold collector.
Does vacuum existence from the intake manifold collector?
YES >> GO TO 4.
NO >> Replace intake manifold collector.
4.CHECK VACUUM HOSE
1. Stop engine.
2. Check vacuum hose for crack, clogging, improper connection or
disconnection. Refer to EC-94, "System Diagram".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair hoses or tubes.

SEF109L

5.CHECK VIAS CONTROL SOLENOID VALVE 1

Refer to EC-394, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace VIAS control solenoid valve 1.
6.CHECK VACUUM EXISTENCE-II
With CONSULT-III
1. Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2. Start engine and let it idle.
3. Perform VIAS S/V-2 in ACTIVE TEST mode with CONSULT-III.
4. Turn VIAS control solenoid valve 2 ON and OFF, and check vacuum existence under the following condi-
tions.

Revision: 2008 October EC-468 2009 Murano

 VARIABLE INDUCTION AIR SYSTEM
< COMPONENT DIAGNOSIS > [VQ35DE]

VIAS S/V 2 Vacuum A

ON Existed
OFF Not existed
EC
Without CONSULT-III
1. Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2. Disconnect VIAS control solenoid valve 1 harness connector. C
3. Start engine.
4. Rev engine quickly up to approximately 5,000 rpm.
5. Check vacuum existence under the following conditions.
D
Condition Operation
Idle Existed
E
Rev engine quickly up to approximately 5,000 rpm Not existed
Is the inspection result normal?
YES >> Repair or replace power valve actuator 2. F
NO >> GO TO 7.
7.CHECK VACUUM HOSE
G
1. Stop engine.
2. Check vacuum hose for crack, clogging, improper connection or
disconnection. Refer to EC-94, "System Diagram".
H
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair hoses or tubes.
I

SEF109L

8.CHECK VIAS CONTROL SOLENOID VALVE 2 K

Refer to EC-397, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 9. L
NO >> Replace VIAS control solenoid valve 2.
9.CHECK INTERMITTENT INCIDENT M
Refer to GI-40, "Intermittent Incident".

>> INSPECTION END N

Revision: 2008 October EC-469 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

ECU DIAGNOSIS
ECM
Reference Value INFOID:0000000003388285

VALUES ON THE DIAGNOSIS TOOL

Remarks:
z Specification data are reference values.
z 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 TIM-
ING 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 Values/Status

Almost the same speed as
ENG SPEED Run engine and compare CONSULT-III value with the tachometer indication.
the tachometer indication.
MAS A/F SE-B1 See EC-127, "Description".
B/FUEL SCHDL See EC-127, "Description".
A/F ALPHA-B1 See EC-127, "Description".
A/F ALPHA-B2 See EC-127, "Description".
COOLAN TEMP/S Engine: After warming up More than 70C (158F)
A/F SEN1 (B1) Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
A/F SEN1 (B2) Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
0 - 0.3 V Approx. 0.6 -
HO2S2 (B1) - Engine: After warming up
1.0 V
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
0 - 0.3 V Approx. 0.6 -
HO2S2 (B2) - Engine: After warming up
1.0 V
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
HO2S2 MNTR (B1) - Engine: After warming up LEAN RICH
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
HO2S2 MNTR (B2) - Engine: After warming up LEAN RICH
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
Turn drive wheels and compare CONSULT-III value with the speedometer in- Almost the same speed as
VHCL SPEED SE
dication. speedometer indication
BATTERY VOLT Ignition switch: ON (Engine stopped) 11 - 14 V

Ignition switch: ON Accelerator pedal: Fully released 0.5 - 1.0 V

ACCEL SEN 1
(Engine stopped) Accelerator pedal: Fully depressed 4.2 - 4.8 V

Ignition switch: ON Accelerator pedal: Fully released 0.5 - 1.0 V

ACCEL SEN 2*1 (Engine stopped) Accelerator pedal: Fully depressed 4.2 - 4.8 V

Revision: 2008 October EC-470 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Monitor Item Condition Values/Status
A
Ignition switch: ON Accelerator pedal: Fully released More than 0.36 V
TP SEN 1-B1 (Engine stopped)
Selector lever: D position Accelerator pedal: Fully depressed Less than 4.75 V

Ignition switch: ON Accelerator pedal: Fully released More than 0.36 V EC

TP SEN 2-B1*1 (Engine stopped)
Selector lever: D position Accelerator pedal: Fully depressed Less than 4.75 V

Indicates fuel tank tempera- C

FUEL T/TMP SE Ignition switch: ON
ture
Indicates intake air tempera-
INT/A TEMP SE Ignition switch: ON
ture D
EVAP SYS PRES Ignition switch: ON Approx. 1.8 - 4.8 V
Depending on fuel level of
FUEL LEVEL SE Ignition switch: ON
fuel tank E
START SIGNAL Ignition switch: ON START ON OFF ON OFF

Ignition switch: ON Accelerator pedal: Fully released ON

CLSD THL POS F
(Engine stopped) Accelerator pedal: Slightly depressed OFF
Air conditioner switch: OFF OFF
Engine: After warming up, idle the
AIR COND SIG Air conditioner switch: ON
engine ON G
(Compressor operates.)
Selector lever: P or N position ON
P/N POSI SW Ignition switch: ON
Selector lever: Except above position OFF H
Engine: After warming up, idle the Steering wheel: Not being turned OFF
PW/ST SIGNAL
engine Steering wheel: Being turned ON
Rear window defogger switch: ON I
and/or ON
LOAD SIGNAL Ignition switch: ON Lighting switch: 2nd position
Rear window defogger switch and lighting J
OFF
switch: OFF
IGNITION SW Ignition switch: ON OFF ON ON OFF ON
Heater fan switch: ON ON K
Engine: After warming up, idle the
HEATER FAN SW
engine Heater fan switch: OFF OFF
Brake pedal: Fully released OFF
BRAKE SW Ignition switch: ON L
Brake pedal: Slightly depressed ON
Engine: After warming up Idle 2.0 - 3.0 msec
Selector lever: P or N position
INJ PULSE-B1 M
Air conditioner switch: OFF 2,000 rpm 1.9 - 2.9 msec
No load
Engine: After warming up Idle 2.0 - 3.0 msec
Selector lever: P or N position N
INJ PULSE-B2
Air conditioner switch: OFF 2,000 rpm 1.9 - 2.9 msec
No load
Engine: After warming up Idle 7 - 17BTDC O
Selector lever: P or N position
IGN TIMING
Air conditioner switch: OFF 2,000 rpm 25 - 45BTDC
No load
P
Engine: After warming up Idle 5 - 35%
Selector lever: P or N position
CAL/LD VALUE
Air conditioner switch: OFF 2,500 rpm 5 - 35%
No load
Engine: After warming up Idle 2.0 - 6.0 gm/s
Selector lever: P or N position
MASS AIRFLOW
Air conditioner switch: OFF 2,500 rpm 7.0 - 20.0 gm/s
No load

Revision: 2008 October EC-471 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Monitor Item Condition Values/Status

Engine: After warming up Idle

Selector lever: P or N position (Accelerator pedal: Not depressed even 0%
PURG VOL C/V slightly, after engine starting.)
Air conditioner switch: OFF
No load 2,000 rpm
Engine: After warming up Idle 5 - 5CA
Selector lever: P or N position
INT/V TIM (B1)
Air conditioner switch: OFF 2,000 rpm Approx. 0 - 30CA
No load
Engine: After warming up Idle 5 - 5CA
Selector lever: P or N position
INT/V TIM (B2)
Air conditioner switch: OFF 2,000 rpm Approx. 0 - 30CA
No load
Engine: After warming up Idle 0 - 2%
Selector lever: P or N position
INT/V SOL (B1)
Air conditioner switch: OFF 2,000 rpm Approx. 0 - 50%
No load
Engine: After warming up Idle 0 - 2%
Selector lever: P or N position
INT/V SOL (B2)
Air conditioner switch: OFF 2,000 rpm Approx. 0 - 50%
No load
Engine: After warming up
Selector lever: P or N position When revving engine up to 5,000 rpm
VIAS S/V-1 OFF ON OFF
Air conditioner switch: OFF quickly
No load
Engine: After warming up
Selector lever: P or N position When revving engine up to 5,000 rpm
VIAS S/V-2 OFF ON OFF
Air conditioner switch: OFF quickly
No load
Air conditioner switch: OFF OFF
Engine: After warming up, idle the
AIR COND RLY Air conditioner switch: ON
engine ON
(Compressor operates)
Below 950 rpm IDLE
ENGINE MOUNT Engine: After warming up
Above 950 rpm TRVL
For 1 second after turning ignition switch: ON
ON
FUEL PUMP RLY Engine running or cranking
Except above OFF
VENT CONT/V Ignition switch: ON OFF
THRTL RELAY Ignition switch: ON ON
Engine coolant temperature: 97C
OFF
(206F) or less
Engine coolant temperature: Between
Engine: After warming up, idle the LOW
98C (208F) and 99C (210F)
COOLING FAN engine
Air conditioner switch: OFF Engine coolant temperature: Between
MID
100C (212F) and 104C (219F)
Engine coolant temperature: 105C
HI
(221F) or more
Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
ON
HO2S2 HTR (B1) - Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
Engine speed: Above 3,600 rpm OFF

Revision: 2008 October EC-472 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Monitor Item Condition Values/Status
A
Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
ON
HO2S2 HTR (B2) - Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load EC
Engine speed: Above 3,600 rpm OFF
Almost the same speed as
I/P PULLY SPD Vehicle speed: More than 20 km/h (12 MPH)
the tachometer indication C
Turn drive wheels and compare CONSULT-III value with the speedometer in- Almost the same speed as
VEHICLE SPEED
dication. the speedometer indication
Idle air volume learning has not been per- D
YET
formed yet.
IDL A/V LEARN Engine: Running
Idle air volume learning has already been
CMPLT
performed successfully. E
ENG OIL TEMP Engine: After warming up More than 70C (158F)
Vehicle has traveled after MIL has illumi- 0 - 65,535 km
TRVL AFTER MIL Ignition switch: ON
nated. (0 - 40,723 miles) F
Engine: After warming up, idle the engine
A/F S1 HTR (B1) 4 - 100%
(More than 140 seconds after starting engine)
Engine: After warming up, idle the engine G
A/F S1 HTR (B2) 4 - 100%
(More than 140 seconds after starting engine)
Engine: Idle
AC PRESS SEN 1.0 - 4.0 V
Both A/C switch and blower fan switch: ON (Compressor operates) H
Turn drive wheels and compare CONSULT-III value with the speedometer in- Almost the same speed as
VHCL SPEED SE
dication. the speedometer indication

SET VHCL SPD Engine: Running ASCD: Operating

The preset vehicle speed is I
displayed
MAIN switch: Pressed ON
MAIN SW Ignition switch: ON
MAIN switch: Released OFF J
CANCEL switch: Pressed ON
CANCEL SW Ignition switch: ON
CANCEL switch: Released OFF
K
RESUME/ACCELERATE switch:
ON
Pressed
RESUME/ACC SW Ignition switch: ON
RESUME/ACCELERATE switch: Re-
OFF L
leased
SET/COAST switch: Pressed ON
SET SW Ignition switch: ON
SET/COAST switch: Released OFF M
BRAKE SW1 Brake pedal: Fully released ON
Ignition switch: ON
(ASCD brake switch) Brake pedal: Slightly depressed OFF
Brake pedal: Fully released OFF N
BRAKE SW2
Ignition switch: ON
(Stop lamp switch) Brake pedal: Slightly depressed ON
VHCL SPD CUT Ignition switch: ON NON
O
LO SPEED CUT Ignition switch: ON NON
AT OD MONITOR Ignition switch: ON OFF
AT OD CANCEL Ignition switch: ON OFF P
MAIN switch: Pressed at the 1st time
CRUISE LAMP Ignition switch: ON ON OFF
at the 2nd time
MAIN switch: ON ASCD: Operating ON
When vehicle speed is between
SET LAMP
40 km/h (25 MPH) and 144 km/h ASCD: Not operating OFF
(89 MPH)

Revision: 2008 October EC-473 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Monitor Item Condition Values/Status
ALT DUTY Engine: Idle 0 - 80%
A/F ADJ-B1 Engine: Running 0.330 - 0.330
A/F ADJ-B2 Engine: Running 0.330 - 0.330
Engine speed: Idle
Battery: Fully charged*2
BAT CUR SEN Selector lever: P or N position Approx. 2,600 - 3,500 mV
Air conditioner switch: OFF
No load
Power generation voltage variable control: Operating ON
ALT DUTY SIG
Power generation voltage variable control: Not operating OFF
*1: 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.
*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to PG-3, "How to Handle Battery".

TERMINAL LAYOUT

PBIA9221J

PHYSICAL VALUES

NOTE:
ECM is located in the engine room left side near battery.
Specification data are reference values.
Pulse signal is measured by CONSULT-III.

Terminal No. Description

Value
Input/ Condition
+ - Signal name (Approx.)
Output
1 BATTERY VOLTAGE
Fuel injector No. 6
(P/B) (11 - 14 V)
[Engine is running]
3
Fuel injector No. 5 Warm-up condition
(L/W)
Idle speed
NOTE:
The pulse cycle changes de-
29
Fuel injector No. 4 pending on rpm at idle
(LG/R)

112 JMBIA0047GB
Output
30 (B) BATTERY VOLTAGE
Fuel injector No. 3
(R/Y) (11 - 14 V)
31
Fuel injector No. 2
(R/W) [Engine is running]
Warm-up condition
Engine speed: 2,000 rpm
32
Fuel injector No. 1
(R/B)
JMBIA0048GB

2 112 Throttle control motor power BATTERY VOLTAGE

Input [Ignition switch: ON]
(G/W) (B) supply (11 - 14 V)

Revision: 2008 October EC-474 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value A
Input/ Condition
+ - Signal name (Approx.)
Output

2.9 - 8.8 V
EC
[Engine is running]
Warm-up condition
4 112 A/F sensor 1 heater
Output Idle speed
(BR/Y) (B) (bank 1) C
(More than 140 seconds after
starting engine)

JMBIA0902GB
D
0 - 14 V

[Ignition switch: ON]

Engine stopped E
Selector lever: D position
Accelerator pedal: Fully de-
pressed
F
JMBIA0031GB
5 112
Throttle control motor (Open) Output
(L) (B)
0 - 14 V
G
[Ignition switch: ON]
Engine stopped
Selector lever: D position
Accelerator pedal: Fully re- H
leased

JMBIA0032GB
I
0 - 14 V

[Ignition switch: ON]

Engine stopped J
6 112
Throttle control motor (Close) Output Selector lever: D position
(P) (B)
Accelerator pedal: Fully re-
leased
K
JMBIA1125GB

2.9 - 8.8 V
L
[Engine is running]
Warm-up condition
8 112
A/F sensor 1 heater (bank 2) Output Idle speed
(SB) (B)
(More than 140 seconds after M
starting engine)

JMBIA0030GB

Revision: 2008 October EC-475 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value
Input/ Condition
+ - Signal name (Approx.)
Output
9 0 - 0.2 V
Ignition signal No. 3
(L/B)
[Engine is running]
10 Warm-up condition
Ignition signal No. 2
(G/R) Idle speed
NOTE:
The pulse cycle changes de-
11
Ignition signal No. 1 pending on rpm at idle
(Y/R)
JMBIA0035GB
112
Output
18 (B)
Ignition signal No. 6 0.1 - 0.4 V
(GR/R)
19
Ignition signal No. 5 [Engine is running]
(P)
Warm-up condition
Engine speed: 2,000 rpm
21
Ignition signal No. 4
(W)
JMBIA0036GB

12
ECM ground
(B)
[Engine is running] 10 V
Engine speed: Below 3,600
rpm after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed be-
13 112 Heated oxygen sensor 2 heat- tween 3,500 and 4,000 rpm
Output for 1 minute and at idle for 1
(P/B) (B) er (bank 1)
minute under no load JMBIA0902GB

[Ignition switch: ON]

Engine stopped
BATTERY VOLTAGE
[Engine is running]
(11 - 14 V)
Engine speed: Above 3,600
rpm
[Ignition switch: ON]
For 1 second after turning ig-
0 - 1.5 V
nition switch ON
14 112 [Engine is running]
Fuel pump relay Output
(GR) (B)
[Ignition switch: ON]
BATTERY VOLTAGE
More than 1 second after turn-
(11 - 14 V)
ing ignition switch ON
0 - 1.0 V BATTERY VOLTAGE
15 112 [Ignition switch: ON OFF]
Throttle control motor relay Output (11 - 14 V) 0 V
(O) (B)
[Ignition switch: ON] 0 - 1.0 V
16
ECM ground
(B/Y)

Revision: 2008 October EC-476 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value A
Input/ Condition
+ - Signal name (Approx.)
Output
[Engine is running] 10 V
Engine speed: Below 3,600 EC
rpm after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed be-
C
17 112 Heated oxygen sensor 2 heat- tween 3,500 and 4,000 rpm
Output for 1 minute and at idle for 1
(R) (B) er (bank 2)
minute under no load JMBIA0902GB
D
[Ignition switch: ON]
Engine stopped
BATTERY VOLTAGE
[Engine is running]
(11 - 14 V) E
Engine speed: Above 3,600
rpm
[Engine is running]
[Ignition switch: OFF]
0 - 1.5 V
F
A few seconds after turning
24 112 ECM relay ignition switch OFF
Output
(W/B) (B) (Self shut-off)
[Ignition switch: OFF] G
BATTERY VOLTAGE
More than a few seconds after
(11 - 14 V)
turning ignition switch OFF
BATTERY VOLTAGE
H
(11 - 14 V)
[Engine is running]
Idle speed
Accelerator pedal: Not de- I
pressed even slightly, after
engine starting

J
JMBIA0039GB
25 112 EVAP canister purge volume
Output
(P/L) (B) control solenoid valve BATTERY VOLTAGE
(11 - 14 V) K
[Engine is running]
Engine speed: approximately
2,000 rpm (More than 100
L
seconds after starting engine)

JMBIA0040GB
M
[Engine is running]
BATTERY VOLTAGE
Warm-up condition
(11 - 14 V)
Idle speed
26 N
112 BATTERY VOLTAGE (11 - 14 V)
(GR/R)*3 VIAS control solenoid valve 2 Output [Engine is running]
(B)
(GR/B)*4 Warm-up condition
0 - 1.0 V
When revving engine up to
O
5,000 rpm quickly
BATTERY VOLTAGE (11 - 14 V)
[Engine is running]
BATTERY VOLTAGE
Warm-up condition P
(11 - 14 V)
Idle speed
27 112 BATTERY VOLTAGE (11 - 14 V)
VIAS control solenoid valve 1 Output [Engine is running]
(V) (B)
Warm-up condition
0 - 1.0 V
When revving engine up to

5,000 rpm quickly
BATTERY VOLTAGE (11 - 14 V)

Revision: 2008 October EC-477 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value
Input/ Condition
+ - Signal name (Approx.)
Output
[Engine is running]
0 - 1.0 V
Idle speed
28 112 Electronic controlled engine
Output [Engine is running]
(BR/W) (B) mount control solenoid valve BATTERY VOLTAGE
Engine speed: More than 950
(11 - 14 V)
rpm
[Engine is running]
Revving engine from idle to
3,000 rpm quickly after the fol-
lowing conditions are met
33 112 Heated oxygen sensor 2
Input - Engine: after warming up 0 - 1.0 V
(W) (B) (bank 1)
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load
[Engine is running]
Revving engine from idle to
3,000 rpm quickly after the fol-
lowing conditions are met
34 112 Heated oxygen sensor 2
Input - Engine: after warming up 0 - 1.0 V
(W/L) (B) (bank 2)
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load
35 Sensor ground

(B) (Heated oxygen sensor 2)
36 Sensor ground

(B) (Throttle position sensor)
[Ignition switch: ON]
Engine stopped
Selector lever: D position More than 0.36 V
Accelerator pedal: Fully re-
37 112 leased
Throttle position sensor 1 Input
(W) (B) [Ignition switch: ON]
Engine stopped
Selector lever: D position Less than 4.75 V
Accelerator pedal: Fully de-
pressed
[Ignition switch: ON]
Engine stopped
Selector lever: D position Less than 4.75 V
Accelerator pedal: Fully re-
38 112 leased
Throttle position sensor 2 Input
(R) (B) [Ignition switch: ON]
Engine stopped
Selector lever: D position More than 0.36 V
Accelerator pedal: Fully de-
pressed
[Engine is running]
Warm-up condition
39 40
Refrigerant pressure sensor Input Both A/C switch and blower 1.0 - 4.0 V
(R) (G)
fan motor switch: ON (Com-
pressor operates)
40 Sensor ground

(G) (Refrigerant pressure sensor)

Revision: 2008 October EC-478 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value A
Input/ Condition
+ - Signal name (Approx.)
Output
[Engine is running]
0.5 - 4.5 V EC
Steering wheel: Being turned
41 48 Power steering pressure sen-
Output [Engine is running]
(O/B) (B/P) sor
Steering wheel: Not being 0.4 - 0.8 V
turned C
[Engine is running]
42 44
(BR) (G/B)
Battery current sensor Input Battery: Fully charged*2 2.6 - 3.5 V
Idle speed D
44 Sensor ground

(G/B) (Battery current sensor)
45 49 E
A/F sensor 1 (bank 1) Input [Ignition switch: ON] 2.2 V
(P) (L)
0 - 4.8 V
46 52 Engine coolant temperature
Input [Engine is running] Output voltage varies with engine F
(Y) (B/R) sensor
coolant temperature.
47 36 Sensor power supply
[Ignition switch: ON] 5V
(G) (B) (Throttle position sensor)
G
Sensor ground
48
(Power steering pressure
(B/P)
sensor)
H
[Engine is running] 1.8 V
49 112
A/F sensor 1 (bank 1) Input Warm-up condition Output voltage varies with air fuel
(L) (B)
Engine speed: 2,000 rpm ratio.
0 - 4.8 V I
50 56
Intake air temperature sensor Input [Engine is running] Output voltage varies with intake
(L/Y) (G/B)
air temperature.
51 44 Sensor power supply
[Ignition switch: ON] 5V
J
(R/Y) (G/B) (Battery current sensor)
Sensor ground
52 (Engine coolant temperature
K
(B/R) sensor/Engine oil tempera-
ture sensor)
53 57
A/F sensor 1 (bank 2) Input [Ignition switch: ON] 2.2 V L
(V) (LG)
0 - 4.8 V
54 52
Engine oil temperature sensor Input [Engine is running] Output voltage varies with engine
(G) (B/R)
oil temperature. M
Sensor power supply
55 48
(Power steering pressure [Ignition switch: ON] 5V
(SB) (Y)
sensor) N
Sensor ground
56
(Mass air flow sensor/Intake
(G/B)
air temperature sensor)
O
[Engine is running] 1.8 V
57 112
A/F sensor 1 (bank 2) Input Warm-up condition Output voltage varies with air fuel
(LG) (B)
Engine speed: 2,000 rpm ratio.
[Engine is running]
P
Warm-up condition 0.9 - 1.2 V
58 56 Idle speed
Mass air flow sensor Input
(O) (G/B) [Engine is running]
Warm-up condition 1.6 - 1.9 V
Engine speed: 2,500 rpm

Revision: 2008 October EC-479 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value
Input/ Condition
+ - Signal name (Approx.)
Output
Sensor power supply
59 64
[Camshaft position sensor [Ignition switch: ON] 5V
(G/W) (B/R)
(PHASE) (bank 1)]
Sensor ground
60
[Crankshaft position sensor
(Y/B)
(POS)]
61 67 [Engine is running]
(B) ()
Knock sensor (bank 1) Input
Idle speed 2.5 V*1

62 67 [Engine is running]
(W) ()
Knock sensor (bank 2) Input
Idle speed 2.5 V*1

Sensor power supply

63 68
[Camshaft position sensor [Ignition switch: ON] 5V
(R/W) (Y/G)
(PHASE) (bank 2)]
Sensor ground
64
[Camshaft position sensor
(B/R)
(PHASE) (bank 1)]

4.0 - 5.0 V
[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle
JMBIA0041GB
65 60 Crankshaft position sensor
Input
(W/B) (Y/B) (POS)
4.0 - 5.0 V

[Engine is running]
Engine speed: 2,000 rpm

JMBIA0042GB

67 Sensor ground

() (Knock sensor)
Sensor ground
68
[Camshaft position sensor
(Y/G)
(PHASE) (bank 2)]

3.0 - 5.0 V
[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle

69 68 Camshaft position sensor JMBIA0045GB

Input
(BR/W) (Y/G) (PHASE) (bank 2)
3.0 - 5.0 V

[Engine is running]
Engine speed is 2,000 rpm

JMBIA0046GB

Revision: 2008 October EC-480 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value A
Input/ Condition
+ - Signal name (Approx.)
Output

3.0 - 5.0 V
EC
[Engine is running]
Warm-up condition
Idle speed
NOTE: C
The pulse cycle changes de-
pending on rpm at idle
JMBIA0045GB
70 64 Camshaft position sensor D
Input
(W/R) (B/R) (PHASE) (bank 1)
3.0 - 5.0 V

E
[Engine is running]
Engine speed is 2,000 rpm

F
JMBIA0046GB

72 40 Sensor power supply

[Ignition switch: ON] 5V
(BR/W) (G) (Refrigerant pressure sensor) G
[Engine is running]
BATTERY VOLTAGE
Warm-up condition
(11 - 14 V)
Idle speed H
7 - 12 V
75 112 Intake valve timing control so-
Output
(Y) (B) lenoid valve (bank 2) [Engine is running] I
Warm-up condition
Engine speed: 2,000 rpm
J
JMBIA0038GB

Sensor power supply

76 60
[Crankshaft position sensor [Ignition switch: ON] 5V K
(R/G) (Y/B)
(POS)]
77 112 Power supply for ECM (Back- BATTERY VOLTAGE
Input [Ignition switch: OFF]
(W/L) (B) up) (11 - 14 V) L
[Engine is running]
BATTERY VOLTAGE
Warm-up condition
(11 - 14 V)
Idle speed
M
7 - 12 V
78 112 Intake valve timing control so-
Output
(R/L) (B) lenoid valve (bank 1) [Engine is running] N
Warm-up condition
Engine speed: 2,000 rpm

O
JMBIA0038GB

[Ignition switch: ON]

Engine stopped P
0.5 - 1.0 V
Accelerator pedal: Fully re-
81 84 Accelerator pedal position leased
Input
(W) (B) sensor 1 [Ignition switch: ON]
Engine stopped
4.2 - 4.8 V
Accelerator pedal: Fully de-
pressed

Revision: 2008 October EC-481 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value
Input/ Condition
+ - Signal name (Approx.)
Output
[Ignition switch: ON]
Engine stopped
0.25 - 0.50 V
Accelerator pedal: Fully re-
82 100 Accelerator pedal position leased
Input
(O) (G) sensor 2 [Ignition switch: ON]
Engine stopped
2.0 - 2.5 V
Accelerator pedal: Fully de-
pressed
Sensor power supply
83 84
(Accelerator pedal position [Ignition switch: ON] 5V
(BR) (B)
sensor 1)
Sensor ground
84
(Accelerator pedal position
(B)
sensor 1)
[Ignition switch: ON]
4V
ASCD steering switch: OFF
[Ignition switch: ON]
0V
MAIN switch: Pressed
[Ignition switch: ON]
85 92 1V
ASCD steering switch Input CANCEL switch: Pressed
(Y) (BR)
[Ignition switch: ON]
RESUME/ACCELERATE 3V
switch: Pressed
[Ignition switch: ON]
2V
SET/COAST switch: Pressed
86 96 EVAP control system pres-
Input [Ignition switch: ON] 1.8 - 4.8 V
(SB) (GR) sure sensor
Sensor power supply
87 100
(Accelerator pedal position [Ignition switch: ON] 5V
(GR) (G)
sensor 2)
88 Input/
Data link connector
(O) Output
Sensor power supply
91 96
(EVAP control system pres- [Ignition switch: ON] 5V
(L) (GR)
sure sensor)
92 Sensor ground

(BR) (ASCD steering switch)
[Ignition switch: OFF] 0V
93 112
Ignition switch Input BATTERY VOLTAGE
(BR) (B) [Ignition switch: ON]
(11 - 14 V)

Revision: 2008 October EC-482 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value A
Input/ Condition
+ - Signal name (Approx.)
Output

1V
EC
[Engine is running]
Warm-up condition
Idle speed
NOTE: C
The pulse cycle changes de-
pending on rpm at idle
JMBIA0076GB
94 112 D
Engine speed output signal Output
(GR) (B)
1V

E
[Engine is running]
Engine speed: 2,000 rpm

F
JMBIA0077GB

0 - 4.8 V
95 104
Fuel tank temperature sensor Input [Engine is running] Output voltage varies with fuel tank G
(Y) (SB)
temperature.
Sensor ground
96
(EVAP control system pres- H
(GR)
sure sensor)
97 Input/
CAN communication line
(P) Output
I
98 Input/
CAN communication line
(L) Output
Sensor ground
100 J
(Accelerator pedal position
(G)
sensor 2)
[Ignition switch: ON] BATTERY VOLTAGE
Selector lever: P or N position (11 - 14 V) K
102 112
PNP signal Input [Ignition switch: ON]
(R) (B)
Selector lever: Except above 0V
position L
Sensor ground
104
(Fuel tank temperature sen-
(SB)
sor)
M
105 112 BATTERY VOLTAGE
Power supply for ECM Input [Ignition switch: ON]
(V) (B) (11 - 14 V)
[Ignition switch: OFF] N
0V
Brake pedal: Fully released
106 112
Stop lamp switch Input [Ignition switch: OFF]
(SB) (B) BATTERY VOLTAGE
Brake pedal: Slightly de-
(11 - 14 V) O
pressed
107
(B)
ECM ground
108 P
(B)
109 112 EVAP canister vent control BATTERY VOLTAGE
Output [Ignition switch: ON]
(W) (B) valve (11 - 14 V)

Revision: 2008 October EC-483 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Terminal No. Description
Value
Input/ Condition
+ - Signal name (Approx.)
Output
[Ignition switch: ON]
Brake pedal: Slightly de- 0V
110 112 pressed
ASCD brake switch Input
(G) (B)
[Ignition switch: ON] BATTERY VOLTAGE
Brake pedal: Fully released (11 - 14 V)
111
(B)
ECM ground
112
(B)

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
*1: This may vary depending on internal resistance of the tester.
*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to PG-3, "How to Handle Battery".
*3: Up to VIN JN8AZ18U*9W100000, JN8AZ18W*9W200000, JN8AZ18U*9W710000, JN8AZ18W*9W810000.
*4: From VIN JN8AZ18U*9W100001, JN8AZ18W*9W200001, JN8AZ18U*9W710001, JN8AZ18W*9W810001.

Wiring DiagramENGINE CONTROL SYSTEM INFOID:0000000003388286

NOTE:
Type A Up to VIN: JN8AZ18U*9W100000, JN8AZ18W*9W200000 (EXCEPT FOR MEXICO),
JN8AZ18U*9W710000, JN8AZ18W*9W810000 (FOR MEXICO)
Type B From VIN: JN8AZ18U*9W100001, JN8AZ18W*9W200001 (EXCEPT FOR MEXICO),
JN8AZ18U*9W710001, JN8AZ18W*9W810001 (FOR MEXICO)
Up to VIN: JN8AZ18U*9W100000, JN8AZ18W*9W200000 (EXCEPT FOR MEXICO),

Revision: 2008 October EC-484 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
JN8AZ18U*9W710000, JN8AZ18W*9W810000 (FOR MEXICO)
A

EC

JCBWM1036GB
P

Revision: 2008 October EC-485 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1037GB

Revision: 2008 October EC-486 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1038GB

Revision: 2008 October EC-487 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1039GB

Revision: 2008 October EC-488 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1040GB

Revision: 2008 October EC-489 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1041GB

Revision: 2008 October EC-490 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1042GB

Revision: 2008 October EC-491 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1043GB

Revision: 2008 October EC-492 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1044GB

Revision: 2008 October EC-493 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1045GB

Revision: 2008 October EC-494 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1046GB

Revision: 2008 October EC-495 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1047GB

Revision: 2008 October EC-496 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1048GB

Revision: 2008 October EC-497 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1049GB

Revision: 2008 October EC-498 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1050GB

Revision: 2008 October EC-499 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1051GB

From VIN: JN8AZ18U*9W100001, JN8AZ18W*9W200001 (EXCEPT FOR MEXICO),

Revision: 2008 October EC-500 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
JN8AZ18U*9W710001, JN8AZ18W*9W810001 (FOR MEXICO)
A

EC

JCBWM1052GB
P

Revision: 2008 October EC-501 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1053GB

Revision: 2008 October EC-502 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1054GB

Revision: 2008 October EC-503 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1055GB

Revision: 2008 October EC-504 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1056GB

Revision: 2008 October EC-505 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1057GB

Revision: 2008 October EC-506 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1058GB

Revision: 2008 October EC-507 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1059GB

Revision: 2008 October EC-508 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1059GB

Revision: 2008 October EC-509 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1060GB

Revision: 2008 October EC-510 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1061GB

Revision: 2008 October EC-511 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1062GB

Revision: 2008 October EC-512 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1063GB

Revision: 2008 October EC-513 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1064GB

Revision: 2008 October EC-514 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1065GB

Revision: 2008 October EC-515 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

JCBWM1066GB

Revision: 2008 October EC-516 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

EC

JCBWM1067GB

P
Fail-safe INFOID:0000000003388287

NON DTC RELATED ITEM

Revision: 2008 October EC-517 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

Engine operating condi- Reference

Detected items Remarks
tion in fail-safe mode page
Engine speed will not Malfunction indicator When there is an open circuit on MIL circuit, the ECM cannot warn the
rise more than 2,500 rpm lamp circuit driver by illuminating MIL when there is malfunction on engine control
due to the fuel cut system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the EC-456
driver that engine control system malfunctions and MIL circuit is open
by means of operating the fail-safe function.
The fail-safe function also operates when above diagnoses except MIL
circuit are detected and demands the driver to repair the malfunction.

DTC RELATED ITEM

DTC No. Detected items Engine operating condition in fail-safe mode

P0011 Intake valve timing control The signal is not energized to the intake valve timing control solenoid valve and the valve
P0021 control does not function.
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 tempera- Engine coolant temperature will be determined by ECM based on the following condition.
P0118 ture sensor circuit CONSULT-III displays the engine coolant temperature decided by ECM.
Engine coolant temperature decided
Condition
(CONSULT-III display)
Just as ignition switch is turned ON
40C (104F)
or START
Approx 4 minutes or more after en-
80C (176F)
gine starting
40 - 80C (104 - 176F)
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.
P0122 Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
P0123 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 the normal
P0223 condition.
P2135 Therefore, the acceleration will be poor.
P0196 Engine oil temperature Intake valve timing control does not function.
P0197 sensor
P0198
P0500 Vehicle speed sensor The cooling fan operates (Highest) while engine is running.
P0605 ECM (When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.
P0643 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1805 Brake switch 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
P2100 Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
P2103 fixed opening (approx. 5 degrees) by the return spring.
P2101 Electric throttle control ECM stops the electric throttle control actuator control, throttle valve is maintained at a
function fixed opening (approx. 5 degrees) by the return spring.

Revision: 2008 October EC-518 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
DTC No. Detected items Engine operating condition in fail-safe mode
A
P2118 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2119 Electric throttle control ac- (When electric throttle control actuator does not function properly due to the return spring
tuator malfunction:) EC
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.
(When throttle valve opening angle in fail-safe mode is not in specified range:) C
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.
(When ECM detects the throttle valve is stuck open:) D
While the vehicle is being driven, it slows down gradually because of fuel cut. After the
vehicle stops, the engine stalls.
The engine can restart in the N or P position, and engine speed will not exceed 1,000 rpm
or more. E
P2122 Accelerator pedal position The ECM controls the electric throttle control actuator in regulating the throttle opening in
P2123 sensor 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 the normal
P2128 condition.
F
P2138 Therefore, the acceleration will be poor.

DTC Inspection Priority Chart INFOID:0000000003388288

G
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
H

Revision: 2008 October EC-519 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

Priority Detected items (DTC)

1 U0101 U0164 U1000 U1001 CAN communication line
P0101 P0102 P0103 Mass air flow sensor
P0112 P0113 P0127 Intake air temperature sensor
P0116 P0117 P0118 P0125 Engine coolant temperature sensor
P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
P0128 Thermostat function
P0181 P0182 P0183 Fuel tank temperature sensor
P0196 P0197 P0198 Engine oil temperature sensor
P0327 P0328 P0332 P0333 Knock sensor
P0335 Crankshaft position sensor (POS)
P0340 P0345 Camshaft position sensor (PHASE)
P0460 P0461 P0462 P0463 Fuel level sensor
P0500 Vehicle speed sensor
P0605 P0607 ECM
P0643 Sensor power supply
P0705 P0850 Park/Neutral position (PNP) switch
P1550 P1551 P1552 P1553 P1554 Battery current sensor
P1610 - P1615 NATS
P1700 CVT control system
P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
2 P0031 P0032 P0051 P0052 Air fuel ratio (A/F) sensor 1 heater
P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater
P0075 P0081 Intake valve timing control solenoid valve
P0130 P0131 P0132 P0133 P0150 P0151 P0152 P0153 P2A00 P2A03 Air fuel ratio (A/F) sensor 1
P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2
P0441 EVAP control system purge flow monitoring
P0443 P0444 P0445 EVAP canister purge volume control solenoid valve
P0447 P0448 EVAP canister vent control valve
P0451 P0452 P0453 EVAP control system pressure sensor
P0550 Power steering pressure sensor
P0603 ECM power supply
P0710 P0715 P0720 P0740 P0744 P0745 P0746 P0776 P0778 P0840 P0845 P1740 CVT related sensors, solenoid valves
and switches
P1217 Engine over temperature (OVERHEAT)
P1720 Vehicle speed sensor
P1777 P1778 CVT step motor
P1800 P1801 VIAS control solenoid valve
P1805 Brake switch
P2100 P2103 Throttle control motor relay
P2101 Electric throttle control function
P2118 Throttle control motor
3 P0011 P0021 Intake valve timing control
P0171 P0172 P0174 P0175 Fuel injection system function
P0300 - P0306 Misfire
P0420 P0430 Three way catalyst function
P0442 P0456 EVAP control system (SMALL LEAK, VERY SMALL LEAK)
P0455 EVAP control system (GROSS LEAK)
P0506 P0507 Idle speed control system
P1148 P1168 Closed loop control
P1212 TCS communication line
P1421 Cold start control
P1564 ASCD steering switch
P1572 ASCD brake switch
P1574 ASCD vehicle speed sensor
P1715 Primary speed sensor
P2119 Electric throttle control actuator

Revision: 2008 October EC-520 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
DTC Index INFOID:0000000003388289

A
:Applicable : Not applicable
DTC*1
Items Reference EC
CONSULT-III SRT code Trip MIL
(CONSULT-III screen terms) page
ECM*3
GST*2
U0101 0101*4 LOST COMM (ECM) 1 EC-138
C
U0164 0164*4 LOST COMM (HVAC) 1 EC-139

U1000 1000*4 CAN COMM CIRCUIT 1 EC-140

4
D
U1001 1001* CAN COMM CIRCUIT 2 EC-140
NO DTC IS DETECTED.
P0000 0000 FURTHER TESTING Blinking*7
E
MAY BE REQUIRED.
P0011 0011 INT/V TIM CONT-B1 2 EC-141
P0021 0021 INT/V TIM CONT-B2 2 EC-141
F
P0031 0031 A/F SEN1 HTR (B1) 2 EC-145
P0032 0032 A/F SEN1 HTR (B1) 2 EC-145
P0037 0037 HO2S2 HTR (B1) 2 EC-148 G
P0038 0038 HO2S2 HTR (B1) 2 EC-148
P0051 0051 A/F SEN1 HTR (B2) 2 EC-145
H
P0052 0052 A/F SEN1 HTR (B2) 2 EC-145
P0057 0057 HO2S2 HTR (B2) 2 EC-148
P0058 0058 HO2S2 HTR (B2) 2 EC-148 I
P0075 0075 INT/V TIM V/CIR-B1 2 EC-151
P0081 0081 INT/V TIM V/CIR-B2 2 EC-151
J
P0101 0101 MAF SEN/CIRCUIT-B1 2 EC-154
P0102 0102 MAF SEN/CIRCUIT-B1 1 EC-162
P0103 0103 MAF SEN/CIRCUIT-B1 1 EC-162 K
P0112 0112 IAT SEN/CIRCUIT-B1 2 EC-167
P0113 0113 IAT SEN/CIRCUIT-B1 2 EC-167
L
P0116 0116 ECT SEN/CIRC 2 EC-170
P0117 0117 ECT SEN/CIRC 1 EC-172
P0118 0118 ECT SEN/CIRC 1 EC-172 M
P0122 0122 TP SEN 2/CIRC-B1 1 EC-175
P0123 0123 TP SEN 2/CIRC-B1 1 EC-175
P0125 0125 ECT SENSOR 2 EC-178 N
P0127 0127 IAT SENSOR-B1 2 EC-181
P0128 0128 THERMSTAT FNCTN 2 EC-183
O
P0130 0130 A/F SENSOR1 (B1) 2 EC-186
P0131 0131 A/F SENSOR1 (B1) 2 EC-190
P0132 0132 A/F SENSOR1 (B1) 2 EC-194 P
P0133 0133 A/F SENSOR1 (B1) 2 EC-198
P0137 0137 HO2S2 (B1) 2 EC-203
P0138 0138 HO2S2 (B1) 2 EC-210
P0139 0139 HO2S2 (B1) 2 EC-219
P0150 0150 A/F SENSOR1 (B2) 2 EC-186

Revision: 2008 October EC-521 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

DTC*1
Items Reference
CONSULT-III SRT code Trip MIL
(CONSULT-III screen terms) page
ECM*3
GST*2
P0151 0151 A/F SENSOR1 (B2) 2 EC-190
P0152 0152 A/F SENSOR1 (B2) 2 EC-194
P0153 0153 A/F SENSOR1 (B2) 2 EC-198
P0157 0157 HO2S2 (B2) 2 EC-203
P0158 0158 HO2S2 (B2) 2 EC-210
P0159 0159 HO2S2 (B2) 2 EC-219
P0171 0171 FUEL SYS-LEAN-B1 2 EC-226
P0172 0172 FUEL SYS-RICH-B1 2 EC-231
P0174 0174 FUEL SYS-LEAN-B2 2 EC-226
P0175 0175 FUEL SYS-RICH-B2 2 EC-231
P0181 0181 FTT SENSOR 2 EC-236
P0182 0182 FTT SEN/CIRCUIT 2 EC-239
P0183 0183 FTT SEN/CIRCUIT 2 EC-239
P0196 0196 EOT SEN/CIRC 2 EC-242
P0197 0197 EOT SEN/CIRC 2 EC-245
P0198 0198 EOT SEN/CIRC 2 EC-245
P0222 0222 TP SEN 1/CIRC-B1 1 EC-248
P0223 0223 TP SEN 1/CIRC-B1 1 EC-248
P0300 0300 MULTI CYL MISFIRE 1 or 2 EC-251
P0301 0301 CYL 1 MISFIRE 1 or 2 EC-251
P0302 0302 CYL 2 MISFIRE 1 or 2 EC-251
P0303 0303 CYL 3 MISFIRE 1 or 2 EC-251
P0304 0304 CYL 4 MISFIRE 1 or 2 EC-251
P0305 0305 CYL 5 MISFIRE 1 or 2 EC-251
P0306 0306 CYL 6 MISFIRE 1 or 2 EC-251
P0327 0327 KNOCK SEN/CIRC-B1 2 EC-257
P0328 0328 KNOCK SEN/CIRC-B1 2 EC-257
P0332 0332 KNOCK SEN/CIRC-B2 2 EC-257
P0333 0333 KNOCK SEN/CIRC-B2 2 EC-257
P0335 0335 CKP SEN/CIRCUIT 2 EC-260
P0340 0340 CMP SEN/CIRC-B1 2 EC-264
P0345 0345 CMP SEN/CIRC-B2 2 EC-264
P0420 0420 TW CATALYST SYS-B1 2 EC-268
P0430 0430 TW CATALYST SYS-B2 2 EC-268
P0441 0441 EVAP PURG FLOW/MON 2 EC-273
P0442 0442 EVAP SMALL LEAK 2 EC-278
P0443 0443 PURG VOLUME CONT/V 2 EC-284
P0444 0444 PURG VOLUME CONT/V 2 EC-289
P0445 0445 PURG VOLUME CONT/V 2 EC-289
P0447 0447 VENT CONTROL VALVE 2 EC-292
P0448 0448 VENT CONTROL VALVE 2 EC-296
P0451 0451 EVAP SYS PRES SEN 2 EC-300

Revision: 2008 October EC-522 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

DTC*1
Items Reference A
CONSULT-III SRT code Trip MIL
(CONSULT-III screen terms) page
ECM*3
GST*2
P0452 0452 EVAP SYS PRES SEN 2 EC-303 EC
P0453 0453 EVAP SYS PRES SEN 2 EC-308
P0455 0455 EVAP GROSS LEAK 2 EC-314
C
P0456 0456 EVAP VERY SML LEAK *6 2 EC-320
P0460 0460 FUEL LEV SEN SLOSH 2 EC-327
P0461 0461 FUEL LEVEL SENSOR 2 EC-329 D
P0462 0462 FUEL LEVL SEN/CIRC 2 EC-331
P0463 0463 FUEL LEVL SEN/CIRC 2 EC-331

E
P0500 0500 VEH SPEED SEN/CIRC*5 2 EC-333
P0506 0506 ISC SYSTEM 2 EC-335
P0507 0507 ISC SYSTEM 2 EC-337 F
P0550 0550 PW ST P SEN/CIRC 2 EC-339
P0603 0603 ECM BACK UP/CIRCUIT 2 EC-342
P0605 0605 ECM 1 or 2 or EC-344 G
P0607 0607 ECM 1 EC-346
P0643 0643 SENSOR POWER/CIRC 1 EC-347
H
P0705 0705 PNP SW/CIRC 2 TM-44
P0710 0710 ATF TEMP SEN/CIRC*8 1 TM-47
P0715 0715 INPUT SPD SEN/CIRC 2 TM-50 I

P0720 0720 VEH SPD SEN/CIR AT*5 2 TM-53

P0740 0740 TCC SOLENOID/CIRC 2 TM-60 J
P0744 0744 A/T TCC S/V FNCTN 2 TM-62
P0745 0745 L/PRESS SOL/CIRC 2 TM-64
P0746 0746 PRS CNT SOL/A FCTN 1 TM-66 K
P0776 0776 PRS CNT SOL/B FCTN 2 TM-68
P0778 0778 PRS CNT SOL/B CIRC 2 TM-70 L
P0840 0840 TR PRS SENS/A CIRC 2 TM-72
P0845 0845 TR PRS SENS/B CIRC 2 TM-78
P0850 0850 P-N POS SW/CIRCUIT 2 EC-350 M
P1148 1148 CLOSED LOOP-B1 1 EC-353
P1168 1168 CLOSED LOOP-B2 1 EC-353
N
P1212 1212 TCS/CIRC 2 EC-354
P1217 1217 ENG OVER TEMP 1 EC-355
P1225 1225 CTP LEARNING-B1 2 EC-359 O
P1226 1226 CTP LEARNING-B1 2 EC-361
P1421 1421 COLD START CONTROL 2 EC-363
P
P1550 1550 BAT CURRENT SENSOR 2 EC-365
P1551 1551 BAT CURRENT SENSOR 2 EC-368
P1552 1552 BAT CURRENT SENSOR 2 EC-368
P1553 1553 BAT CURRENT SENSOR 2 EC-371
P1554 1554 BAT CURRENT SENSOR 2 EC-374
P1564 1564 ASCD SW 1 EC-377

Revision: 2008 October EC-523 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]

DTC*1
Items Reference
CONSULT-III SRT code Trip MIL
(CONSULT-III screen terms) page
ECM*3
GST*2
P1572 1572 ASCD BRAKE SW 1 EC-380
P1574 1574 ASCD VHL SPD SEN 1 EC-386
SEC-39 or
P1610 1610 LOCK MODE 2
SEC-269
SEC-40 or
P1611 1611 ID DISCORD, IMM-ECM 2
SEC-270
SEC-42 or
P1612 1612 CHAIN OF ECM-IMMU 2
SEC-272
SEC-43 or
P1614 1614 CHAIN OF IMMU-KEY 2
SEC-273
SEC-46 or
P1615 1615 DIFFERENCE OF KEY 2
SEC-276
P1700 1700 CVT C/U FUNCT 1 EC-388
P1715 1715 IN PULY SPEED 2 EC-389
P1720 1720 V/SP SEN(A/T OUT) 2 EC-391
P1740 1740 LU-SLCT SOL/CIRC 2 TM-92
P1777 1777 STEP MOTR CIRC 1 TM-95
P1778 1778 STEP MOTR FNC 2 TM-98
P1800 1800 VIAS S/V-1 2 EC-393
P1801 1801 VIAS S/V-2 2 EC-396
P1805 1805 BRAKE SW/CIRCUIT 2 EC-399
P2100 2100 ETC MOT PWR-B1 1 EC-402
P2101 2101 ETC FNCTN/CIRC-B1 1 EC-404
P2103 2103 ETC MOT PWR 1 EC-402
P2118 2118 ETC MOT-B1 1 EC-408
P2119 2119 ETC ACTR-B1 1 EC-411
P2122 2122 APP SEN 1/CIRC 1 EC-413
P2123 2123 APP SEN 1/CIRC 1 EC-413
P2127 2127 APP SEN 2/CIRC 1 EC-416
P2128 2128 APP SEN 2/CIRC 1 EC-416
P2135 2135 TP SENSOR-B1 1 EC-420
P2138 2138 APP SENSOR 1 EC-423
P2A00 2A00 A/F SENSOR1 (B1) 2 EC-427
P2A03 2A03 A/F SENSOR1 (B2) 2 EC-427
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: The troubleshooting for this DTC needs CONSULT-III.
*5: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates.
*6: SRT code will not be set if the self-diagnostic result is NG.
*7: When the ECM is in the mode displays SRT status, MIL may blink. For the details, refer to How to Display SRT Status.
*8: When erasing this DTC, always use CONSULT-III or GST.

How to Set SRT Code INFOID:0000000003388290

To set all SRT codes, self-diagnoses 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.

Revision: 2008 October EC-524 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
WITH CONSULT-III
Perform corresponding DTC Confirmation Procedure one by one based on Performance Priority in the table A
on SRT Item.
WITHOUT CONSULT-III
The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The EC
driving pattern should be performed one or more times to set all SRT codes.
DRIVING PATTERN
C

PBIB3622E

Revision: 2008 October EC-525 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
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 short-
est.
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 - 30C (68 - 86F)
Diagnosis is performed as quickly as possible under normal conditions.
Under different conditions [For example: ambient air temperature other than 20 - 30C (68 - 86F)], diagno-
sis may also be performed.
Pattern 1:
The engine is started at the engine coolant temperature of 10 to 35C (14 to 95F)
(where the voltage between the ECM terminal 46 and ground is 3.0 - 4.3 V).
The engine must be operated at idle speed until the engine coolant temperature is greater than 70C
(158F) (where the voltage between the ECM terminal 46 and ground is lower than 1.4 V).
The engine is started at the fuel tank temperature of warmer than 0C (32F) (where the voltage
between the ECM terminal 95 and ground is less than 4.1 V).
Pattern 2:
When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted.
In this case, the time required for diagnosis may be extended.
Pattern 3:
Operate vehicle following the driving pattern shown in the figure.
Release the accelerator pedal during deceleration of vehicle speed
from 90 km/h (56 MPH) to 0 km/h (0 MPH).
Pattern 4:
The accelerator pedal must be held very steady during steady-
state driving.
If the accelerator pedal is moved, the test must be conducted
again.
*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
PBIB2244E
speed is 90 km/h (56 MPH) again.
*2: Checking the vehicle speed with GST is advised.
Suggested Transmission Gear Position for CVT Models
Set the selector lever in the D position.
Test Value and Test Limit INFOID:0000000004747837

The following is the information specified in Service $06 of SAE J1979.

The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while
being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the
maximum or minimum value and is compared with the test value being monitored.
These data (test value and test limit) are specified by On Board Monitor ID(OBDMID), Test ID (TID), Unit and
Scaling ID and can be displayed on the GST screen.
The items of the test value and test limit will be displayed with GST screen which items are provided by the
ECM. (eg., if bank 2 is not applied on this vehicle, only the items of bank 1 are displayed)

Revision: 2008 October EC-526 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Test value and Test
limit A
OBD- (GST display)
Item Self-diagnostic test item DTC Description
MID Unit and
TID Scaling EC
ID
Minimum sensor output voltage for test
P0131 83H 0BH
cycle
C
Maximum sensor output voltage for test
P0131 84H 0BH
cycle
Minimum sensor output voltage for test D
P0130 85H 0BH
cycle
Maximum sensor output voltage for test
P0130 86H 0BH
cycle
Air fuel ratio (A/F) sensor 1 E
01H Response rate: Response ratio (Lean to
(Bank 1) P0133 87H 04H
Rich)
Response rate: Response ratio (Rich to
P0133 88H 04H
Lean)
F
P2A00 89H 84H The amount of shift in air fuel ratio
P2A00 8AH 84H The amount of shift in air fuel ratio
G
HO2S P0130 8BH 0BH Difference in sensor output voltage
P0133 8CH 83H Response gain at the limited frequency
Minimum sensor output voltage for test H
P0138 07H 0CH
cycle

Heated oxygen sensor 2 Maximum sensor output voltage for test

02H P0137 08H 0CH
(Bank 1) cycle I
P0138 80H 0CH Sensor output voltage
P0139 81H 0CH Difference in sensor output voltage
J
Minimum sensor output voltage for test
P0143 07H 0CH
cycle

Heated oxygen sensor 3 Maximum sensor output voltage for test

03H P0144 08H 0CH K
(Bank 1) cycle
P0146 80H 0CH Sensor output voltage
P0145 81H 0CH Difference in sensor output voltage
L

Revision: 2008 October EC-527 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Test value and Test
limit
OBD- (GST display)
Item Self-diagnostic test item DTC Description
MID Unit and
TID Scaling
ID
Minimum sensor output voltage for test
P0151 83H 0BH
cycle
Maximum sensor output voltage for test
P0151 84H 0BH
cycle
Minimum sensor output voltage for test
P0150 85H 0BH
cycle
Maximum sensor output voltage for test
P0150 86H 0BH
cycle
Air fuel ratio (A/F) sensor 1
05H Response rate: Response ratio (Lean to
(Bank 2) P0153 87H 04H
Rich)
Response rate: Response ratio (Rich to
P0153 88H 04H
Lean)
P2A03 89H 84H The amount of shift in air fuel ratio
P2A03 8AH 84H The amount of shift in air fuel ratio
HO2S P0150 8BH 0BH Difference in sensor output voltage
P0153 8CH 83H Response gain at the limited frequency
Minimum sensor output voltage for test
P0158 07H 0CH
cycle

Heated oxygen sensor 2 Maximum sensor output voltage for test

06H P0157 08H 0CH
(Bank 2) cycle
P0158 80H 0CH Sensor output voltage
P0159 81H 0CH Difference in sensor output voltage
Minimum sensor output voltage for test
P0163 07H 0CH
cycle

Heated oxygen sensor 3 Maximum sensor output voltage for test

07H P0164 08H 0CH
(Bank2) cycle
P0166 80H 0CH Sensor output voltage
P0165 81H 0CH Difference in sensor output voltage
P0420 80H 01H O2 storage index
Switching time lag engine exhaust index
P0420 82H 01H
Three way catalyst function value
21H
(Bank1) Difference in 3rd O2 sensor output volt-
P2423 83H 0CH
age

CATA- P2423 84H 84H O2 storage index in HC trap catalyst

LYST P0430 80H 01H O2 storage index
Switching time lag engine exhaust index
P0430 82H 01H
Three way catalyst function value
22H
(Bank2) Difference in 3rd O2 sensor output volt-
P2424 83H 0CH
age
P2424 84H 84H O2 storage index in HC trap catalyst

Revision: 2008 October EC-528 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Test value and Test
limit A
OBD- (GST display)
Item Self-diagnostic test item DTC Description
MID Unit and
TID Scaling EC
ID
Low Flow Faults: EGR temp change
P0400 80H 96H
rate (short term)
C
Low Flow Faults: EGR temp change
P0400 81H 96H
rate (long term)
EGR Low Flow Faults: Difference between D
31H EGR function
SYSTEM P0400 82H 96H max EGR temp and EGR temp under
idling condition
P0400 83H 96H Low Flow Faults: Max EGR temp
E
High Flow Faults: EGR temp increase
P1402 84H 96H
rate
VTC intake function diagnosis (VTC
P0011 80H 9DH
alignment check diagnosis)
F
VTC exhaust function diagnosis (VTC
P0014 81H 9DH
alignment check diagnosis)
35H VVT Monitor (Bank1) G
VTC intake function diagnosis (VTC
P0011 82H 9DH
drive failure diagnosis)
VTC exhaust function diagnosis (VTC
P0014 83H 9DH H
VVT drive failure diagnosis)
SYSTEM VTC intake function diagnosis (VTC
P0021 80H 9DH
alignment check diagnosis)
VTC exhaust function diagnosis (VTC
I
P0024 81H 9DH
alignment check diagnosis)
36H VVT Monitor (Bank2)
VTC intake function diagnosis (VTC
P0021 82H 9DH J
drive failure diagnosis)
VTC exhaust function diagnosis (VTC
P0024 83H 9DH
drive failure diagnosis)
EVAP control system leak Difference in pressure sensor output K
39H P0455 80H 0CH
(Cap Off) voltage before and after pull down
EVAP control system leak Leak area index (for more than 0.04
3BH P0442 80H 05H
(Small leak) inch) L
Leak area index (for more than 0.02
EVAP P0456 80H 05H
EVAP control system leak inch)
SYSTEM 3CH
(Very small leak) Maximum internal pressure of EVAP M
P0456 81H FDH
system during monitoring
Difference in pressure sensor output
3DH Purge flow system P0441 83H 0CH voltage before and after vent control N
valve close
A/F sensor 1 heater Low Input:P0031 Converted value of Heater electric cur-
41H 81H 0BH
(Bank 1) High Input:P0032 rent to voltage
O
Heated oxygen sensor 2 heat- Low Input:P0037 Converted value of Heater electric cur-
42H 80H 0CH
er (Bank 1) High Input:P0038 rent to voltage
Heated oxygen sensor 3 heat- Converted value of Heater electric cur- P
O2 SEN- 43H P0043 80H 0CH
er (Bank 1) rent to voltage
SOR
HEATER A/F sensor 1 heater Low Input:P0051 Converted value of Heater electric cur-
45H 81H 0BH
(Bank 2) High Input:P0052 rent to voltage
Heated oxygen sensor 2 heat- Low Input:P0057 Converted value of Heater electric cur-
46H 80H 0CH
er (Bank 2) High Input:P0058 rent to voltage
Heated oxygen sensor 3 heat- Converted value of Heater electric cur-
47H P0063 80H 0CH
er (Bank 2) rent to voltage

Revision: 2008 October EC-529 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Test value and Test
limit
OBD- (GST display)
Item Self-diagnostic test item DTC Description
MID Unit and
TID Scaling
ID
Secondary Air Injection System Incor-
P0411 80H 01H
rect Flow Detected
Bank1: P0491 Secondary Air Injection System Insuffi-
81H 01H
Bank2: P0492 cient Flow
Secondary Air Injection System Pump
P2445 82H 01H
Stuck Off
SEC-
Secondary Air Injection System High
OND- 71H Secondary Air system P2448 83H 01H
Airflow
ARY AIR
Bank1: P2440 Secondary Air Injection System Switch-
84H 01H
Bank2: P2442 ing Valve Stuck Open
Secondary Air Injection System Switch-
P2440 85H 01H
ing Valve Stuck Open
Secondary Air Injection System Pump
P2444 86H 01H
Stuck On

Fuel injection system function P0171 or P0172 80H 2FH Long term fuel trim
81H
(Bank 1) P0171 or P0172 81H 24H The number of lambda control clamped
FUEL
SYSTEM P0174 or P0175 80H 2FH Long term fuel trim
Fuel injection system function
82H
(Bank 2) P0174 or P0175 81H 24H The number of lambda control clamped

Revision: 2008 October EC-530 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Test value and Test
limit A
OBD- (GST display)
Item Self-diagnostic test item DTC Description
MID Unit and
TID Scaling EC
ID
Misfiring counter at 1000 revolution of
P0301 80H 24H
the first cylinder
C
Misfiring counter at 1000 revolution of
P0302 81H 24H
the second cylinder
Misfiring counter at 1000 revolution of D
P0303 82H 24H
the third cylinder
Misfiring counter at 1000 revolution of
P0304 83H 24H
the fourth cylinder
E
Misfiring counter at 1000 revolution of
P0305 84H 24H
the fifth cylinder
Misfiring counter at 1000 revolution of
P0306 85H 24H
the sixth cylinder
F
Misfiring counter at 1000 revolution of
P0307 86H 24H
the seventh cylinder
G
Misfiring counter at 1000 revolution of
P0308 87H 24H
the eighth cylinder
Misfiring counter at 1000 revolution of
P0300 88H 24H H
the multiple cylinders
Misfiring counter at 200 revolution of the
P0301 89H 24H
first cylinder
MISFIRE A1H Multiple Cylinder Misfires I
Misfiring counter at 200 revolution of the
P0302 8AH 24H
second cylinder
Misfiring counter at 200 revolution of the
P0303 8BH 24H J
third cylinder
Misfiring counter at 200 revolution of the
P0304 8CH 24H
fourth cylinder
Misfiring counter at 200 revolution of the K
P0305 8DH 24H
fifth cylinder
Misfiring counter at 200 revolution of the
P0306 8EH 24H
sixth cylinder L
Misfiring counter at 200 revolution of the
P0307 8FH 24H
seventh cylinder
Misfiring counter at 200 revolution of the M
P0308 90H 24H
eighth cylinder
Misfiring counter at 1000 revolution of
P0300 91H 24H
the single cylinder N
Misfiring counter at 200 revolution of the
P0300 92H 24H
single cylinder
Misfiring counter at 200 revolution of the O
P0300 93H 24H
multiple cylinders

Revision: 2008 October EC-531 2009 Murano

 ECM
< ECU DIAGNOSIS > [VQ35DE]
Test value and Test
limit
OBD- (GST display)
Item Self-diagnostic test item DTC Description
MID Unit and
TID Scaling
ID
EWMA (Exponential Weighted Moving
P0301 0BH 24H Average) misfire counts for last 10 driv-
A2H No. 1 Cylinder Misfire ing cycles
Misfire counts for last/current driving cy-
P0301 0CH 24H
cles
EWMA (Exponential Weighted Moving
P0302 0BH 24H Average) misfire counts for last 10 driv-
A3H No. 2 Cylinder Misfire ing cycles
Misfire counts for last/current driving cy-
P0302 0CH 24H
cles
EWMA (Exponential Weighted Moving
P0303 0BH 24H Average) misfire counts for last 10 driv-
A4H No. 3 Cylinder Misfire ing cycles
Misfire counts for last/current driving cy-
P0303 0CH 24H
cles
EWMA (Exponential Weighted Moving
P0304 0BH 24H Average) misfire counts for last 10 driv-
A5H No. 4 Cylinder Misfire ing cycles
Misfire counts for last/current driving cy-
P0304 0CH 24H
cles
MISFIRE
EWMA (Exponential Weighted Moving
P0305 0BH 24H Average) misfire counts for last 10 driv-
A6H No. 5 Cylinder Misfire ing cycles
Misfire counts for last/current driving cy-
P0305 0CH 24H
cles
EWMA (Exponential Weighted Moving
P0306 0BH 24H Average) misfire counts for last 10 driv-
A7H No. 6 Cylinder Misfire ing cycles
Misfire counts for last/current driving cy-
P0306 0CH 24H
cles
EWMA (Exponential Weighted Moving
P0307 0BH 24H Average) misfire counts for last 10 driv-
A8H No. 7 Cylinder Misfire ing cycles
Misfire counts for last/current driving cy-
P0307 0CH 24H
cles
EWMA (Exponential Weighted Moving
P0308 0BH 24H Average) misfire counts for last 10 driv-
A9H No. 8 Cylinder Misfire ing cycles
Misfire counts for last/current driving cy-
P0308 0CH 24H
cles

Revision: 2008 October EC-532 2009 Murano

 ENGINE CONTROL SYSTEM SYMPTOMS
< SYMPTOM DIAGNOSIS > [VQ35DE]

SYMPTOM DIAGNOSIS A
ENGINE CONTROL SYSTEM SYMPTOMS
Symptom Table INFOID:0000000003388292
EC

SYSTEM BASIC ENGINE CONTROL SYSTEM

C
SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

LACK OF POWER/POOR ACCELERATION
D

HARD/NO START/RESTART (EXCP. HA)

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

E

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
page
F

IDLING VIBRATION
ENGINE STALL

H
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel pump circuit 1 1 2 3 2 2 2 3 2 EC-447
Fuel pressure regulator system 3 3 4 4 4 4 4 4 4 4 EC-545 I
Fuel injector circuit 1 1 2 3 2 2 2 2 EC-444
Evaporative emission system 3 3 4 4 4 4 4 4 4 4 EC-77
J
Air Positive crankcase ventilation sys-
4 4 4 4 4 4 4 4 1 EC-462
tem 3 3
Incorrect idle speed adjustment 1 1 1 1 1 EC-12
K
EC-404,
Electric throttle control actuator 1 1 2 3 3 2 2 2 2 2 2
EC-411
Ignition Incorrect ignition timing adjustment 3 3 1 1 1 1 1 1 EC-12
L
Ignition circuit 1 1 2 2 2 2 2 2 EC-451
Power supply and ground circuit 2 2 3 3 3 3 3 2 3 EC-135
EC-154, M
Mass air flow sensor circuit 2
EC-162
1
EC-172,
Engine coolant temperature sensor circuit 3 3
EC-178 N
EC-186,
3 EC-190,
Air fuel ratio (A/F) sensor 1 circuit 1 2 2 2 2 2 EC-194,
EC-198,
O
EC-427
EC-175,
EC-248, P
Throttle position sensor circuit EC-359,
EC-361,
2 2 EC-420
EC-347,
EC-413,
Accelerator pedal position sensor circuit 3 2 1
EC-416,
EC-423

Revision: 2008 October EC-533 2009 Murano

 ENGINE CONTROL SYSTEM SYMPTOMS
< SYMPTOM DIAGNOSIS > [VQ35DE]
SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

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

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
page

IDLING VIBRATION
Warranty symptom code AA ENGINE STALL
AB AC AD AE AF AG AH AJ AK AL AM HA
Knock sensor circuit 2 3 EC-257
EC-242,
Engine oil temperature sensor 4 2 3
EC-219
Crankshaft position sensor (POS) circuit 2 2 EC-260
Camshaft position sensor (PHASE) circuit 3 2 EC-264
Vehicle speed signal circuit 2 3 3 3 EC-333
Power steering pressure sensor circuit 2 3 3 EC-339
EC-342,
ECM 2 2 3 3 3 3 3 3 3 3 3
EC-344
Intake valve timing control solenoid valve cir-
3 2 1 3 2 2 3 3 EC-151
cuit
PNP signal circuit 3 3 3 3 3 EC-350
VIAS control solenoid valve 1 circuit 1 EC-393
VIAS control solenoid valve 2 circuit 1 EC-396
Refrigerant pressure sensor circuit 2 3 3 4 EC-463
Electrical load signal circuit 3 EC-439
HAC-38,
Air conditioner circuit 2 2 3 3 3 3 3 3 3 3 2
HAC-157
ABS actuator and electric unit (control unit) 4 BRC-29
1 - 6: The numbers refer to the order of inspection.
(continued on next page)

SYSTEM ENGINE MECHANICAL & OTHER

Revision: 2008 October EC-534 2009 Murano

 ENGINE CONTROL SYSTEM SYMPTOMS
< SYMPTOM DIAGNOSIS > [VQ35DE]

SYMPTOM A

OVERHEATS/WATER TEMPERATURE HIGH

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

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

C
Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
page

IDLING VIBRATION
D

ENGINE STALL
E

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

Fuel Fuel tank FL-12
5
Fuel piping 5 5 5 5 5 5 FL-4
Vapor lock G
5
Valve deposit
Poor fuel (Heavy weight gasoline, 5 5 5 5 5 5 5
H
Low octane)
Air Air duct EM-27
Air cleaner EM-27 I
Air leakage from air duct
(Mass air flow sensor electric EM-27
5 5 5 5 5 5
throttle control actuator)
5 5 5 5 J
Electric throttle control actuator EM-29
Air leakage from intake manifold/ EM-29,
Collector/Gasket EM-32
K
Cranking Battery PG-106
1 1 1 1 1 1 1
Generator circuit CHG-21
Starter circuit 3 1 STR-5 L
Signal plate 6 EM-114
PNP signal 4 TM-45
M
Engine Cylinder head
5 5 5 5 5 5 5 5 EM-107
Cylinder head gasket 4 3
Cylinder block N
Piston 4
Piston ring
6 6 6 6 6 6 6 6 EM-118 O
Connecting rod
Bearing
Crankshaft P
Valve Timing chain EM-66
mecha-
Camshaft EM-94
nism
Intake valve timing control 5 5 5 5 5 5 5 5 EM-66
Intake valve
3 EM-107
Exhaust valve

Revision: 2008 October EC-535 2009 Murano

 ENGINE CONTROL SYSTEM SYMPTOMS
< SYMPTOM DIAGNOSIS > [VQ35DE]
SYMPTOM

OVERHEATS/WATER TEMPERATURE HIGH

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

BATTERY DEAD (UNDER CHARGE)

HESITATION/SURGING/FLAT SPOT

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

SPARK KNOCK/DETONATION

SLOW/NO RETURN TO IDLE

Reference

ROUGH IDLE/HUNTING
HIGH IDLE/LOW IDLE
page

IDLING VIBRATION
Warranty symptom code AA ENGINE STALL
AB AC AD AE AF AG AH AJ AK AL AM HA
Exhaust Exhaust manifold/Tube/Muffler/
Gasket EM-34, EX-
5 5 5 5 5 5 5 5
4
Three way catalyst
Lubrica- LU-7, LU-
Oil pan/Oil strainer/Oil pump/Oil
tion 10, LU-11,
filter/Oil gallery/Oil cooler 5 5 5 5 5 5 5 5 LU-13
Oil level (Low)/Filthy oil LU-7
Cooling CO-12,
Radiator/Hose/Radiator filler cap
CO-12
Thermostat 5 CO-23
Water pump CO-18
5 5 5 5 5 5 5 4 5
Water gallery CO-2
Cooling fan CO-16
Coolant level (Low)/Contaminat- 5
CO-8
ed coolant
NVIS (NISSAN Vehicle Immobilizer System SEC-18,
1 1
NATS) SEC-244
1 - 6: The numbers refer to the order of inspection.

Revision: 2008 October EC-536 2009 Murano

 NORMAL OPERATING CONDITION
< SYMPTOM DIAGNOSIS > [VQ35DE]
NORMAL OPERATING CONDITION
A
Description INFOID:0000000003388293

FUEL CUT CONTROL (AT NO LOAD AND HIGH ENGINE SPEED) EC

If the engine speed is above 1,400 rpm under no load (for example, the selector lever position is P or N and
engine speed is over 1,400 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off var-
ies based on engine speed. C
Fuel cut will be operated until the engine speed reaches 1,000 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under Multiport Fuel Injection (MFI) System, EC-28,
"System Description". D

Revision: 2008 October EC-537 2009 Murano

 PRECAUTIONS
< PRECAUTION > [VQ35DE]

PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000003388294

The Supplemental Restraint System such as AIR BAG and SEAT BELT PRE-TENSIONER, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
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 must be performed by
an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR 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 and/or orange harnesses or har-
ness connectors.
Precautions For Xenon Headlamp Service INFOID:0000000003388295

WARNING:
Comply with the following warnings to prevent any serious accident.
Disconnect the battery cable (negative terminal) or the power supply fuse before installing, remov-
ing, or touching the xenon headlamp (bulb included). The xenon headlamp contains high-voltage
generated parts.
Never work with wet hands.
Check the xenon headlamp ON-OFF status after assembling it to the vehicle. Never turn the xenon
headlamp ON in other conditions. Connect the power supply to the vehicle-side connector.
(Turning it ON outside the lamp case may cause fire or visual impairments.)
Never touch the bulb glass immediately after turning it OFF. It is extremely hot.
CAUTION:
Comply with the following cautions to prevent any error and malfunction.
Install the xenon bulb securely. (Insufficient bulb socket installation may melt the bulb, the connec-
tor, the housing, etc. by high-voltage leakage or corona discharge.)
Never perform HID circuit inspection with a tester.
Never touch the xenon bulb glass with hands. Never put oil and grease on it.
Dispose of the used xenon bulb after packing it in thick vinyl without breaking it.
Never wipe out dirt and contamination with organic solvent (thinner, gasoline, etc.).
Precaution for Procedure without Cowl Top Cover INFOID:0000000003388296

When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.

PIIB3706J

Revision: 2008 October EC-538 2009 Murano

 PRECAUTIONS
< PRECAUTION > [VQ35DE]
On Board Diagnostic (OBD) System of Engine and CVT INFOID:0000000003388297

A
The ECM has an on board diagnostic system. It will illuminate the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION: EC
Always to turn the ignition switch OFF and disconnect the negative battery cable before any repair
or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will
cause the MIL to illuminate.
Always to connect and lock the connectors securely after work. A loose (unlocked) connector will C
cause the MIL to illuminate 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-lock- D
ing type harness connector. For description and how to disconnect, refer to PG-96, "Description".
Always route and secure the harnesses properly after work. The interference of the harness with a
bracket, etc. may cause the MIL to illuminate due to the short circuit.
Always to connect rubber tubes properly after work. A misconnected or disconnected rubber tube E
may cause the MIL to illuminate due to the malfunction of the EVAP system or fuel injection system,
etc.
Always to erase the unnecessary malfunction information (repairs completed) from the ECM and F
TCM (Transmission control module) before returning the vehicle to the customer.
General Precautions INFOID:0000000003388298

G
Always use a 12 volt battery as power source.
Never attempt to disconnect battery cables while engine is
running. H
Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative bat-
tery cable. Failure to do so may damage the ECM because
battery voltage is applied to ECM even if ignition switch is I
turned OFF.
Before removing parts, turn ignition switch OFF and then dis-
connect battery ground cable. J
SEF289H

Never disassemble ECM. K

If a battery cable is disconnected, the memory will return to the ECM value.
The ECM will now start to self-control at its initial value. Thus, engine operation can vary slightly in
this case. However, this is not an indication of a malfunction. Never replace parts because of a slight L
variation.
If the battery is disconnected, the following emission-related diagnostic information will be lost
within 24 hours.
- Diagnostic trouble codes M
- 1st trip diagnostic trouble codes
- Freeze frame data
- 1st trip freeze frame data N
- System readiness test (SRT) codes
- Test values
When connecting ECM harness connector, fasten (B) it
securely with a lever (1) as far as it will go as shown in the fig- O
ure.
- ECM (2)
- Loosen (A) P

PBIB2947E

Revision: 2008 October EC-539 2009 Murano

 PRECAUTIONS
< PRECAUTION > [VQ35DE]
When connecting or disconnecting pin connectors into or
from ECM, never damage pin terminals (bends or break).
Check that there are not any bends or breaks on ECM pin ter-
minal, when connecting pin connectors.
Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge) volt-
age to develop in coil and condenser, thus resulting in dam-
age to ICs.
Keep engine control system harness at least 10 cm (4 in) away
from adjacent harness, to prevent engine control system mal-
functions due to receiving external noise, degraded operation
PBIB0090E
of ICs, etc.
Keep engine control system parts and harness dry.
Before replacing ECM, perform ECM Terminals and Reference
Value inspection and check ECM functions properly. Refer to
EC-470, "Reference Value".
Handle mass air flow sensor carefully to avoid damage.
Never clean mass air flow sensor with any type of detergent.
Never disassemble electric throttle control actuator.
Even a slight leakage in the air intake system can cause seri-
ous incidents.
Never shock or jar the camshaft position sensor (PHASE),
crankshaft position sensor (POS).
MEF040D

After performing each TROUBLE DIAGNOSIS, perform DTC

Confirmation Procedure or Component Function Check.
The DTC should not be displayed in the DTC Confirmation
Procedure if the repair is completed. The Component Func-
tion Check should be a good result if the repair is completed.

SEF217U

Revision: 2008 October EC-540 2009 Murano

 PRECAUTIONS
< PRECAUTION > [VQ35DE]
When measuring ECM signals with a circuit tester, never allow
the two tester probes to contact. A
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
EC

G
SEF348N

B1 indicates bank 1, B2 indicates bank 2 as shown in the fig- H

ure.
Never operate fuel pump when there is no fuel in lines.
Tighten fuel hose clamps to the specified torque.
I

SEC893C
K

Never depress accelerator pedal when starting.

Immediately after starting, never rev up engine unnecessarily. L
Never rev up engine just prior to shutdown.

SEF709Y

Revision: 2008 October EC-541 2009 Murano

 PRECAUTIONS
< PRECAUTION > [VQ35DE]
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 con-
trol units.
- Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Never let them run parallel for a long distance.
- Adjust the antenna and feeder line so that the standing-wave
ratio can be kept smaller.
- Be sure to ground the radio to vehicle body.
SEF708Y

Revision: 2008 October EC-542 2009 Murano

 PREPARATION
< PREPARATION > [VQ35DE]

PREPARATION A
PREPARATION
Special Service Tools INFOID:0000000003388299
EC
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.) Description C
Tool name
(J-44321) Checks fuel pressure
Fuel pressure gauge D
kit

LEC642

(J-44321-6) Connects fuel pressure gauge to quick connector F

Fuel pressure adapter type fuel lines

LBIA0376E
H

Commercial Service Tools INFOID:0000000003388300

Tool name
Description
(Kent-Moore No.)
J
(J-45488) Removes fuel tube quick connectors in engine
Quick connector re- room
lease
K

L
PBIC0198E

Leak detector Locates the EVAP leakage

i.e.: (J-41416)
M

S-NT703

EVAP service port Applys positive pressure through EVAP service O

adapter port
i.e.: (J-41413-OBD)
P

S-NT704

Revision: 2008 October EC-543 2009 Murano

 PREPARATION
< PREPARATION > [VQ35DE]
Tool name
Description
(Kent-Moore No.)
Fuel filler cap adapter Checks fuel tank vacuum relief valve opening
i.e.: (MLR-8382) pressure

S-NT815

Socket wrench Removes and installs engine coolant temperature

sensor

S-NT705

Oxygen sensor thread Reconditions the exhaust system threads before

cleaner installing a new oxygen sensor. Use with anti-
i.e.: (J-43897-18) seize lubricant shown below.
(J-43897-12) a: 18 mm diameter with pitch 1.5 mm for Zirco-
nia Oxygen Sensor
b: 12 mm diameter with pitch 1.25 mm for Tita-
nia Oxygen Sensor
AEM488

Anti-seize lubricant Lubricates oxygen sensor thread cleaning tool

(PermatexTM
i.e.: when reconditioning exhaust system threads.
133AR or equivalent
meeting MIL specifica-
tion MIL-A-907)

S-NT779

Revision: 2008 October EC-544 2009 Murano

 FUEL PRESSURE
< ON-VEHICLE MAINTENANCE > [VQ35DE]

ON-VEHICLE MAINTENANCE A
FUEL PRESSURE
Inspection INFOID:0000000003388301
EC

FUEL PRESSURE RELEASE

With CONSULT-III C
1. Turn ignition switch ON.
2. Perform FUEL PRESSURE RELEASE in WORK SUPPORT mode with CONSULT-III.
D
3. Start engine.
4. After engine stalls, crank it 2 or 3 times to release all fuel pressure.
5. Turn ignition switch OFF. E
Without CONSULT-III
1. Remove fuel pump fuse (2) located in IPDM E/R (1).
F
2. Start engine.
3. After engine stalls, crank it 2 or 3 times to release all fuel pres-
sure.
G
4. Turn ignition switch OFF.
5. Reinstall fuel pump fuse after servicing fuel system.
H

JMBIA1659ZZ
I
FUEL PRESSURE CHECK
CAUTION:
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger. J
NOTE:
Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel
pressure cannot be completely released because Z51 models do not have fuel return system.
Be careful not to scratch or get the fuel hose connection area dirty when servicing, so that the quick K
connector o-ring maintains seal ability.
Use Fuel Pressure Gauge Kit [SST (J-44321)] and Fuel Pressure Adapter [SST (J-44321-6)] to check
fuel pressure. L
1. Release fuel pressure to zero.
2. Remove fuel hose using Quick Connector Release [SST (J-45488)].
Do not twist or kink fuel hose because it is plastic hose. M
Do not remove fuel hose (1) from quick connector.
Keep fuel hose connections clean.
3. Install Fuel Pressure Adapter [SST (J-44321-6)] (B) and Fuel N
Pressure Gauge kit [SST (J44321)] (A) as shown in figure.
Do not distort or bend fuel rail tube when installing fuel pres-
sure gauge adapter.
When reconnecting fuel hose, check the original fuel hose for O
damage and abnormality.
4. Turn ignition switch ON (reactivate fuel pump) and check for fuel
leakage. P
5. Start engine and check for fuel leakage.
6. Read the indication of fuel pressure gauge kit [SST (J-44321)].
During fuel pressure check, check for fuel leakage from fuel JMBIA1127ZZ

connection every 3 minutes.

At idling : Approximately 350 kPa (3.57 kg/cm2, 51 psi)

Revision: 2008 October EC-545 2009 Murano

 FUEL PRESSURE
< ON-VEHICLE MAINTENANCE > [VQ35DE]
7. If result is unsatisfactory, go to next step.
8. Check the following.
Fuel hoses and fuel tubes for clogging
Fuel filter for clogging
Fuel pump
Fuel pressure regulator for clogging
9. If OK, replace fuel pressure regulator.
If NG, repair or replace malfunctioning part.
10. Before disconnecting Fuel Pressure Gauge kit [SST (J-44321)] and Fuel Pressure Adapter [SST (J-
44321-6)], release fuel pressure to zero.

Revision: 2008 October EC-546 2009 Murano

 EVAP LEAK CHECK
< ON-VEHICLE MAINTENANCE > [VQ35DE]
EVAP LEAK CHECK
A
Inspection INFOID:0000000003388302

CAUTION: EC
Never use compressed air or a high pressure pump.
Never exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in EVAP system.
NOTE:
C
Do not start engine.
Improper installation of EVAP service port adapter (commercial service tool) to the EVAP service port may
cause a leakage.
D
WITH CONSULT-III
1. To locate the EVAP leakage, install EVAP service port adapter
(commercial service tool) and pressure pump to EVAP service E
port.
2. Turn ignition switch ON.
3. Select the EVAP SYSTEM CLOSE of WORK SUPPORT F
MODE with CONSULT-III.
4. Touch START. A bar graph (Pressure indicating display) will
appear on the screen.
G
5. Apply positive pressure to the EVAP system until the pressure
indicator reaches the middle of the bar graph. SEF462UA
6. Remove EVAP service port adapter (commercial service tool) H
and hose with pressure pump.
7. Locate the leakage using a leakage detector (commercial ser-
vice tool). Refer to EC-77, "System Diagram".
I

SEF200U

WITHOUT CONSULT-III L
1. To locate the EVAP leakage, install EVAP service port adapter
(commercial service tool) and pressure pump to EVAP service
port. M
2. Apply battery voltage between the terminals of EVAP canister
vent control valve to make a closed EVAP system.
3. To locate the leakage, deliver positive pressure to the EVAP sys- N
tem until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to
0.028 kg/cm2, 0.2 to 0.4 psi).
4. Remove EVAP service port adapter (commercial service tool) O
and hose with pressure pump.
SEF462UA

Revision: 2008 October EC-547 2009 Murano

 EVAP LEAK CHECK
< ON-VEHICLE MAINTENANCE > [VQ35DE]
5. Locate the leakage using a leak detector (commercial service
tool). Refer to EC-77, "System Diagram".

SEF200U

Revision: 2008 October EC-548 2009 Murano

 EVAP CANISTER
< ON-VEHICLE REPAIR > [VQ35DE]

ON-VEHICLE REPAIR A
EVAP CANISTER
Exploded View INFOID:0000000003388303
EC

G
PBIB1383E

Removal and Installation INFOID:0000000003388304 H

REMOVAL
1. Lift up the vehicle. I
2. Remove EVAP canister fixing bolt.
3. Remove EVAP canister.
NOTE: J
The EVAP canister vent control valve and EVAP canister system pressure sensor can be removed without
removing the EVAP canister.
K
INSTALLATION
Install in the reverse order of removal.
NOTE:
Tighten EVAP canister fixing bolt to the specified torque. L

DISASSEMBLY
1. Turn EVAP canister vent control valve counterclockwise. M
2. Remove the EVAP canister vent control valve.

PBIB1384E
P
ASSEMBLY
Assemble in the reverse order of disassembly.
CAUTION:
Always replace O-ring with a new one.

Revision: 2008 October EC-549 2009 Murano

 EVAP CANISTER
< ON-VEHICLE REPAIR > [VQ35DE]
Inspection INFOID:0000000003388305

Check EVAP canister as per the following:

1. Block port (B).
2. Blow air into port (A) and check that it flows freely out of port (C).
3. Release blocked port (B).
4. Apply vacuum pressure to port (B) and check that vacuum pres-
sure exists at the ports (A) and (C).
5. Block port (A) and (B).
6. Apply pressure to port (C) and check that there is no leakage.

JMBIA1133ZZ

Revision: 2008 October EC-550 2009 Murano

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ35DE]

SERVICE DATA AND SPECIFICATIONS (SDS) A

SERVICE DATA AND SPECIFICATIONS (SDS)
Idle Speed INFOID:0000000003388306
EC

Condition Specification
C
No load* (in P or N position) 600 50 rpm
*: Under the following conditions
A/C switch: OFF D
Electric load: OFF (Lights, heater fan & rear window defogger)
Steering wheel: Kept in straight-ahead position

Ignition Timing INFOID:0000000003388307

E

Condition Specification F
No load* (in P or N position) 12 5 BTDC
*: Under the following conditions
A/C switch: OFF G
Electric load: OFF (Lights, heater fan & rear window defogger)
Steering wheel: Kept in straight-ahead position
H
Calculated Load Value INFOID:0000000003388308

I
Condition Specification (Using CONSULT-III or GST)
At idle 10 35 %
At 2,500 rpm 10 35 % J
Mass Air Flow Sensor INFOID:0000000003388309

K
Supply voltage Battery voltage (11 14 V)
Output voltage at idle (in N position) 0.9 1.2 V*
L
2.0 6.0 gm/sec at idle*
Mass air flow (Using CONSULT-III or GST)
7.0 20.0 gm/sec at 2,500 rpm*
*: Engine is warmed up to normal operating temperature and running under no load.
M

Revision: 2008 October EC-551 2009 Murano