Infiniti QX4 (R50). Manual — part 134

CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 231
ECM Terminals and Reference Value . . . . . .231
On Board Diagnosis Logic. . . . . . . . . ...232
Possible Cause. . . . . . . . . . . . . . 232
DTC Confirmation Procedure . . . . . . . . ..232
Wiring Diagram . . . . . . . . . . . . . . 234
Diagnostic Procedure . . . . . . . . . . . ..236

DTC P0135, P0155 HEATED OXYGEN SENSOR 1
HEATER (FRONT) (BANK 1)/(BANK 2). . . . . .240

Description . . . . . . . . . . . . . . . ...240
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 240
ECM Terminals and Reference Value . . . . . .240
On Board Diagnosis Logic. . . . . . . . . ...241
Possible Cause. . . . . . . . . . . . . . 241
DTC Confirmation Procedure . . . . . . . . ..241
Wiring Diagram . . . . . . . . . . . . . . 242
Diagnostic Procedure . . . . . . . . . . . ..244

DTC P0137, P0157 HEATED OXYGEN SENSOR 2
(REAR) (BANK 1)/(BANK 2) (MIN. VOLTAGE
MONITORING) . . . . . . . . . . . . . . . .247

Component Description . . . . . . . . . . ...247
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 247
ECM Terminals and Reference Value . . . . . .247
On Board Diagnosis Logic. . . . . . . . . ...247
Possible Cause. . . . . . . . . . . . . . 248
DTC Confirmation Procedure . . . . . . . . ..248
Overall Function Check . . . . . . . . . . ...248
Wiring Diagram . . . . . . . . . . . . . . 250
Diagnostic Procedure . . . . . . . . . . . ..252

DTC P0138, P0158 HEATED OXYGEN SENSOR 2
(REAR) (BANK 1)/(BANK 2) (MAX. VOLTAGE
MONITORING) . . . . . . . . . . . . . . . .257

Component Description . . . . . . . . . . ...257
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 257
ECM Terminals and Reference Value . . . . . .257
On Board Diagnosis Logic. . . . . . . . . ...257
Possible Cause. . . . . . . . . . . . . . 258
DTC Confirmation Procedure . . . . . . . . ..258
Overall Function Check . . . . . . . . . . ...258
Wiring Diagram . . . . . . . . . . . . . . 260
Diagnostic Procedure . . . . . . . . . . . ..262

DTC P0139, P0159 HEATED OXYGEN SENSOR 2
(REAR) (BANK 1)/(BANK 2) (RESPONSE
MONITORING) . . . . . . . . . . . . . . . .267

Component Description . . . . . . . . . . ...267
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 267
ECM Terminals and Reference Value . . . . . .267

On Board Diagnosis Logic. . . . . . . . . ...267
Possible Cause. . . . . . . . . . . . . . 268
DTC Confirmation Procedure . . . . . . . . ..268
Overall Function Check . . . . . . . . . . ...268
Wiring Diagram . . . . . . . . . . . . . . 270
Diagnostic Procedure . . . . . . . . . . . ..272

DTC P0140, P0160 HEATED OXYGEN SENSOR 2
(REAR) (BANK 1)/(BANK 2) (HIGH VOLTAGE). . 277

Component Description . . . . . . . . . . ...277
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 277
ECM Terminals and Reference Value . . . . . .277
On Board Diagnosis Logic. . . . . . . . . ...277
Possible Cause. . . . . . . . . . . . . . 278
DTC Confirmation Procedure . . . . . . . . ..278
Overall Function Check . . . . . . . . . . ...278
Wiring Diagram . . . . . . . . . . . . . . 280
Diagnostic Procedure . . . . . . . . . . . ..282

DTC P0141, P0161 HEATED OXYGEN SENSOR 2
HEATER (REAR) (BANK 1)/(BANK 2). . . . . ...286

Description . . . . . . . . . . . . . . . ...286
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 286
ECM Terminals and Reference Value . . . . . .286
On Board Diagnosis Logic. . . . . . . . . ...287
Possible Cause. . . . . . . . . . . . . . 287
DTC Confirmation Procedure . . . . . . . . ..287
Wiring Diagram . . . . . . . . . . . . . . 289
Diagnostic Procedure . . . . . . . . . . . ..291

DTC P0171 (RIGHT, -B1), P0174 (LEFT, -B2)
FUEL INJECTION SYSTEM FUNCTION (LEAN). ...294

On Board Diagnosis Logic. . . . . . . . . ...294
Possible Cause. . . . . . . . . . . . . . 294
DTC Confirmation Procedure . . . . . . . . ..294
Wiring Diagram . . . . . . . . . . . . . . 296
Diagnostic Procedure . . . . . . . . . . . ..298

DTC P0172 (RIGHT, -B1), P0175 (LEFT, -B2)
FUEL INJECTION SYSTEM FUNCTION (RICH). . 302

On Board Diagnosis Logic. . . . . . . . . ...302
Possible Cause. . . . . . . . . . . . . . 302
DTC Confirmation Procedure . . . . . . . . ..302
Wiring Diagram . . . . . . . . . . . . . . 304
Diagnostic Procedure . . . . . . . . . . . ..306

DTC P0180 FUEL TANK TEMPERATURE
SENSOR . . . . . . . . . . . . . . . . . ..309

Component Description . . . . . . . . . . ...309
On Board Diagnosis Logic. . . . . . . . . ...309
Possible Cause. . . . . . . . . . . . . . 309
DTC Confirmation Procedure . . . . . . . . ..310
Wiring Diagram . . . . . . . . . . . . . . 311
Diagnostic Procedure . . . . . . . . . . . ..312

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CONTENTS

(Cont’d)

EC-3

DTC P0217 COOLANT OVERTEMPERATURE
ENRICHMENT PROTECTION. . . . . . . . . .314

On Board Diagnosis Logic. . . . . . . . . ...314
Possible Cause. . . . . . . . . . . . . . 314
Overall Function Check . . . . . . . . . . ...314
Diagnostic Procedure . . . . . . . . . . . ..316
Main 12 Causes of Overheating. . . . . . . ..319

DTC P0300 - P0306 NO. 6 - 1 CYLINDER
MISFIRE, MULTIPLE CYLINDER MISFIRE . . . ...320

On Board Diagnosis Logic. . . . . . . . . ...320
Possible Cause. . . . . . . . . . . . . . 320
DTC Confirmation Procedure . . . . . . . . ..321
Diagnostic Procedure . . . . . . . . . . . ..321

DTC P0325 KNOCK SENSOR (KS) . . . . . . ...328

Component Description . . . . . . . . . . ...328
ECM Terminals and Reference Value . . . . . .328
On Board Diagnosis Logic. . . . . . . . . ...328
Possible Cause. . . . . . . . . . . . . . 328
DTC Confirmation Procedure . . . . . . . . ..328
Wiring Diagram . . . . . . . . . . . . . . 330
Diagnostic Procedure . . . . . . . . . . . ..331

DTC P0335 CRANKSHAFT POSITION SENSOR
(CKPS) (POS) . . . . . . . . . . . . . . . ..334

Component Description . . . . . . . . . . ...334
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 334
ECM Terminals and Reference Value . . . . . .335
On Board Diagnosis Logic. . . . . . . . . ...335
Possible Cause. . . . . . . . . . . . . . 335
DTC Confirmation Procedure . . . . . . . . ..336
Wiring Diagram . . . . . . . . . . . . . . 337
Diagnostic Procedure . . . . . . . . . . . ..338

DTC P0340 CAMSHAFT POSITION SENSOR
(CMPS) (PHASE). . . . . . . . . . . . . . .342

Component Description . . . . . . . . . . ...342
ECM Terminals and Reference Value . . . . . .342
On Board Diagnosis Logic. . . . . . . . . ...342
Possible Cause. . . . . . . . . . . . . . 343
DTC Confirmation Procedure . . . . . . . . ..343
Wiring Diagram . . . . . . . . . . . . . . 344
Diagnostic Procedure . . . . . . . . . . . ..345

DTC P0420 (RIGHT BANK, -B1), P0430 (LEFT
BANK, -B2) THREE WAY CATALYST FUNCTION ...347

On Board Diagnosis Logic. . . . . . . . . ...347
Possible Cause. . . . . . . . . . . . . . 347
DTC Confirmation Procedure . . . . . . . . ..348
Overall Function Check . . . . . . . . . . ...348
Diagnostic Procedure . . . . . . . . . . . ..349

DTC P0440 EVAP CONTROL SYSTEM (SMALL
LEAK) (NEGATIVE PRESSURE). . . . . . . . 352

On Board Diagnosis Logic. . . . . . . . . ...352
Possible Cause. . . . . . . . . . . . . . 352

DTC Confirmation Procedure . . . . . . . . ..354
Diagnostic Procedure . . . . . . . . . . . ..355

DTC P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE (CIRCUIT). . . . .367

Description . . . . . . . . . . . . . . . ...367
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 367
ECM Terminals and Reference Value . . . . . .368
On Board Diagnosis Logic. . . . . . . . . ...368
Possible Cause. . . . . . . . . . . . . . 368
DTC Confirmation Procedure . . . . . . . . ..369
Wiring Diagram . . . . . . . . . . . . . . 370
Diagnostic Procedure . . . . . . . . . . . ..371

DTC P0446 EVAPORATIVE EMISSION (EVAP)
CANISTER VENT CONTROL VALVE (CIRCUIT) . ..374

Component Description . . . . . . . . . . ...374
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 374
ECM Terminals and Reference Value . . . . . .374
On Board Diagnosis Logic. . . . . . . . . ...374
Possible Cause. . . . . . . . . . . . . . 375
DTC Confirmation Procedure . . . . . . . . ..375
Wiring Diagram . . . . . . . . . . . . . . 376
Diagnostic Procedure . . . . . . . . . . . ..377

DTC P0450 EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM PRESSURE SENSOR . . . ..381

Component Description . . . . . . . . . . ...381
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 381
ECM Terminals and Reference Value . . . . . .381
On Board Diagnosis Logic. . . . . . . . . ...382
Possible Cause. . . . . . . . . . . . . . 382
DTC Confirmation Procedure . . . . . . . . ..382
Wiring Diagram . . . . . . . . . . . . . . 384
Diagnostic Procedure . . . . . . . . . . . ..385

DTC P0455 EVAP CONTROL SYSTEM (GROSS
LEAK). . . . . . . . . . . . . . . . . . ...394

On Board Diagnosis Logic. . . . . . . . . ...394
Possible Cause. . . . . . . . . . . . . . 394
DTC Confirmation Procedure . . . . . . . . ..396
Diagnostic Procedure . . . . . . . . . . . ..397

DTC P0460 FUEL LEVEL SENSOR FUNCTION
(SLOSH). . . . . . . . . . . . . . . . . ...407

Component Description . . . . . . . . . . ...407
On Board Diagnostic Logic. . . . . . . . . ..407
Possible Cause. . . . . . . . . . . . . . 407
DTC Confirmation Procedure . . . . . . . . ..407
Wiring Diagram . . . . . . . . . . . . . . 408
Diagnostic Procedure . . . . . . . . . . . ..409

DTC P0461 FUEL LEVEL SENSOR FUNCTION . ... 411

Component Description . . . . . . . . . . ... 411
On Board Diagnostic Logic. . . . . . . . . .. 411

CONTENTS

(Cont’d)

EC-4

Possible Cause. . . . . . . . . . . . . . 411
Overall Function Check . . . . . . . . . . ... 411

DTC P0464 FUEL LEVEL SENSOR CIRCUIT . . ...413

Component Description . . . . . . . . . . ...413
On Board Diagnostic Logic. . . . . . . . . ..413
Possible Cause. . . . . . . . . . . . . . 413
DTC Confirmation Procedure . . . . . . . . ..413
Wiring Diagram . . . . . . . . . . . . . . 414
Diagnostic Procedure . . . . . . . . . . . ..415

DTC P0500 VEHICLE SPEED SENSOR (VSS) . . .417

Component Description . . . . . . . . . . ...417
ECM Terminals and Reference Value . . . . . .417
On Board Diagnosis Logic. . . . . . . . . ...417
Possible Cause. . . . . . . . . . . . . . 418
DTC Confirmation Procedure . . . . . . . . ..418
Overall Function Check . . . . . . . . . . ...418
Wiring Diagram . . . . . . . . . . . . . . 420
Diagnostic Procedure . . . . . . . . . . . ..421

DTC P0505 IDLE AIR CONTROL VALVE (IACV) -
AUXILIARY AIR CONTROL (AAC) VALVE . . . ...422

Description . . . . . . . . . . . . . . . ...422
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 423
ECM Terminals and Reference Value . . . . . .423
On Board Diagnosis Logic. . . . . . . . . ...423
Possible Cause. . . . . . . . . . . . . . 423
DTC Confirmation Procedure . . . . . . . . ..423
Wiring Diagram . . . . . . . . . . . . . . 425
Diagnostic Procedure . . . . . . . . . . . ..426

DTC P0510 CLOSED THROTTLE POSITION
SWITCH . . . . . . . . . . . . . . . . . ...431

Component Description . . . . . . . . . . ...431
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 431
ECM Terminals and Reference Value . . . . . .431
On Board Diagnosis Logic. . . . . . . . . ...431
Possible Cause. . . . . . . . . . . . . . 431
DTC Confirmation Procedure . . . . . . . . ..432
Overall Function Check . . . . . . . . . . ...432
Wiring Diagram . . . . . . . . . . . . . . 434
Diagnostic Procedure . . . . . . . . . . . ..435

DTC P0600 A/T COMMUNICATION LINE. . . . ..440

System Description. . . . . . . . . . . . ..440
ECM Terminals and Reference Value . . . . . .440
On Board Diagnosis Logic. . . . . . . . . ...440
Possible Cause. . . . . . . . . . . . . . 440
DTC Confirmation Procedure . . . . . . . . ..440
Wiring Diagram . . . . . . . . . . . . . . 442
Diagnostic Procedure . . . . . . . . . . . ..443

DTC P0605 ECM . . . . . . . . . . . . . . .444

Component Description . . . . . . . . . . ...444
On Board Diagnosis Logic. . . . . . . . . ...444

Possible Cause. . . . . . . . . . . . . . 444
DTC Confirmation Procedure . . . . . . . . ..444
Diagnostic Procedure . . . . . . . . . . . ..445

DTC P1110 (RIGHT, -B1), P1135 (LEFT, -B2)
INTAKE VALVE TIMING CONTROL . . . . . . ..446

Description . . . . . . . . . . . . . . . ...446
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 446
ECM Terminals and Reference Value . . . . . .447
On Board Diagnosis Logic. . . . . . . . . ...448
Possible Cause. . . . . . . . . . . . . . 448
DTC Confirmation Procedure . . . . . . . . ..449

DTC P1111 (RIGHT, -B1), P1136 (LEFT, -B2)
INTAKE VALVE TIMING CONTROL SOLENOID
VALVE (CIRCUIT). . . . . . . . . . . . . . 451

Component Description . . . . . . . . . . ...451
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 451
ECM Terminals and Reference Value . . . . . .451
On Board Diagnosis Logic. . . . . . . . . ...452
Possible Cause. . . . . . . . . . . . . . 452
DTC Confirmation Procedure . . . . . . . . ..452
Wiring Diagram . . . . . . . . . . . . . . 453
Diagnostic Procedure . . . . . . . . . . . ..455

DTC P1130 SWIRL CONTROL VALVE CONTROL
SOLENOID VALVE. . . . . . . . . . . . . ..458

Description . . . . . . . . . . . . . . . ...458
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 459
ECM Terminals and Reference Value . . . . . .459
On Board Diagnosis Logic. . . . . . . . . ...459
Possible Cause. . . . . . . . . . . . . . 460
DTC Confirmation Procedure . . . . . . . . ..460
Wiring Diagram . . . . . . . . . . . . . . 462
Diagnostic Procedure . . . . . . . . . . . ..463

DTC P1140 (RIGHT, -B1), P1145 (LEFT, -B2)
INTAKE VALVE TIMING CONTROL POSITION
SENSOR (CIRCUIT) . . . . . . . . . . . . . 482

Component Description . . . . . . . . . . ...482
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 482
ECM Terminals and Reference Value . . . . . .482
On Board Diagnosis Logic. . . . . . . . . ...483
Possible Cause. . . . . . . . . . . . . . 483
DTC Confirmation Procedure . . . . . . . . ..483
Wiring Diagram . . . . . . . . . . . . . . 485
Diagnostic Procedure . . . . . . . . . . . ..487

DTC P1148 (RIGHT BANK, -B1), P1168 (LEFT
BANK, -B2) CLOSED LOOP CONTROL . . . . ...491

On Board Diagnosis Logic. . . . . . . . . ...491
Possible Cause. . . . . . . . . . . . . . 491
DTC Confirmation Procedure . . . . . . . . ..491

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CONTENTS

(Cont’d)

EC-5

Overall Function Check . . . . . . . . . . ...492
Diagnostic Procedure . . . . . . . . . . . ..492

DTC P1165 SWIRL CONTROL VALVE CONTROL
VACUUM CHECK SWITCH. . . . . . . . . . .493

Component Description . . . . . . . . . . ...493
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 493
ECM Terminals and Reference Value . . . . . .493
On Board Diagnosis Logic. . . . . . . . . ...494
Possible Cause. . . . . . . . . . . . . . 494
DTC Confirmation Procedure . . . . . . . . ..494
Wiring Diagram . . . . . . . . . . . . . . 495
Diagnostic Procedure . . . . . . . . . . . ..496

DTC P1320 IGNITION SIGNAL. . . . . . . . ...499

Component Description . . . . . . . . . . ...499
ECM Terminals and Reference Value . . . . . .499
On Board Diagnosis Logic. . . . . . . . . ...499
Possible Cause. . . . . . . . . . . . . . 500
DTC Confirmation Procedure . . . . . . . . ..500
Wiring Diagram . . . . . . . . . . . . . . 501
Diagnostic Procedure . . . . . . . . . . . ..504

DTC P1335 CRANKSHAFT POSITION SENSOR
(CKPS) (REF) . . . . . . . . . . . . . . . ..510

Component Description . . . . . . . . . . ...510
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 510
ECM Terminals and Reference Value . . . . . .510
On Board Diagnosis Logic. . . . . . . . . ... 511
Possible Cause. . . . . . . . . . . . . . 511
DTC Confirmation Procedure . . . . . . . . .. 511
Wiring Diagram . . . . . . . . . . . . . . 513
Diagnostic Procedure . . . . . . . . . . . ..514

DTC P1336 CRANKSHAFT POSITION SENSOR
(CKPS) (POS) (COG) . . . . . . . . . . . . ..517

Component Description . . . . . . . . . . ...517
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 517
ECM Terminals and Reference Value . . . . . .518
On Board Diagnosis Logic. . . . . . . . . ...518
Possible Cause. . . . . . . . . . . . . . 518
DTC Confirmation Procedure . . . . . . . . ..519
Wiring Diagram . . . . . . . . . . . . . . 520
Diagnostic Procedure . . . . . . . . . . . ..521

DTC P1441 EVAP CONTROL SYSTEM (VERY
SMALL LEAK) . . . . . . . . . . . . . . . .526

On Board Diagnosis Logic. . . . . . . . . ...526
Possible Cause. . . . . . . . . . . . . . 526
DTC Confirmation Procedure . . . . . . . . ..527
Diagnostic Procedure . . . . . . . . . . . ..529

DTC P1444 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE. . . . . . . . ...541

Description . . . . . . . . . . . . . . . ...541

CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 541
ECM Terminals and Reference Value . . . . . .542
On Board Diagnosis Logic. . . . . . . . . ...542
Possible Cause. . . . . . . . . . . . . . 542
DTC Confirmation Procedure . . . . . . . . ..543
Wiring Diagram . . . . . . . . . . . . . . 544
Diagnostic Procedure . . . . . . . . . . . ..545

DTC P1446 EVAPORATIVE EMISSION (EVAP)
CANISTER VENT CONTROL VALVE (CLOSE). . .553

Component Description . . . . . . . . . . ...553
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 553
ECM Terminals and Reference Value . . . . . .553
On Board Diagnosis Logic. . . . . . . . . ...553
Possible Cause. . . . . . . . . . . . . . 554
DTC Confirmation Procedure . . . . . . . . ..554
Wiring Diagram . . . . . . . . . . . . . . 555
Diagnostic Procedure . . . . . . . . . . . ..556

DTC P1447 EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM PURGE FLOW
MONITORING . . . . . . . . . . . . . . . ..561

System Description. . . . . . . . . . . . ..561
On Board Diagnosis Logic. . . . . . . . . ...561
Possible Cause. . . . . . . . . . . . . . 561
DTC Confirmation Procedure . . . . . . . . ..562
Overall Function Check . . . . . . . . . . ...563
Diagnostic Procedure . . . . . . . . . . . ..564

DTC P1448 EVAPORATIVE EMISSION (EVAP)
CANISTER VENT CONTROL VALVE (OPEN). . ...573

Component Description . . . . . . . . . . ...573
CONSULT-II Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 573
ECM Terminals and Reference Value . . . . . .573
On Board Diagnosis Logic. . . . . . . . . ...573
Possible Cause. . . . . . . . . . . . . . 574
DTC Confirmation Procedure . . . . . . . . ..574
Overall Function Check . . . . . . . . . . ...575
Wiring Diagram . . . . . . . . . . . . . . 576
Diagnostic Procedure . . . . . . . . . . . ..577

DTC P1464 FUEL LEVEL SENSOR CIRCUIT
(GROUND SIGNAL) . . . . . . . . . . . . . 582

Component Description . . . . . . . . . . ...582
On Board Diagnostic Logic. . . . . . . . . ..582
Possible Cause. . . . . . . . . . . . . . 582
DTC Confirmation Procedure . . . . . . . . ..582
Wiring Diagram . . . . . . . . . . . . . . 583
Diagnostic Procedure . . . . . . . . . . . ..584

DTC P1490 VACUUM CUT VALVE BYPASS
VALVE (CIRCUIT). . . . . . . . . . . . . . 585

Description . . . . . . . . . . . . . . . ...585

CONTENTS

(Cont’d)

EC-6