2004 INFINITI FX35 diagram

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
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EC
Revision: 2004 November 2004 FX35/FX45
ENGINE CONTROL SYSTEM
VQ35DE
INDEX FOR DTC ...................................................... 15
Alphabetical Index .................................................. 15
DTC No. Index ....................................................... 19
PRECAUTIONS ........................................................ 23
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 23
On Board Diagnostic (OBD) System of Engine and
A/T .......................................................................... 23
Precaution .............................................................. 23
Wiring Diagrams and Trouble Diagnosis ................ 26
PREPARATION ......................................................... 27
Special Service Tools ............................................. 27
Commercial Service Tools ...................................... 28
ENGINE CONTROL SYSTEM .................................. 29
System Diagram ..................................................... 29
Vacuum Hose Drawing ........................................... 30
System Chart ......................................................... 31
Multiport Fuel Injection (MFI) System .................... 32
Electronic Ignition (EI) System ............................... 34
Air Conditioning Cut Control ................................... 35
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 35
CAN communication .............................................. 36
BASIC SERVICE PROCEDURE .............................. 37
Idle Speed and Ignition Timing Check .................... 37
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment ............................................................. 38
Accelerator Pedal Released Position Learning ...... 49
Throttle Valve Closed Position Learning ................ 49
Idle Air Volume Learning ........................................ 49
Fuel Pressure Check .............................................. 51
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 53
Introduction ............................................................ 53
Two Trip Detection Logic ........................................ 53
Emission-Related Diagnostic Information .............. 54
IVIS (Infiniti Vehicle Immobilizer System — NATS) ... 68
Malfunction Indicator Lamp (MIL) ........................... 68
OBD System Operation Chart ................................ 72TROUBLE DIAGNOSIS ............................................ 77
Trouble Diagnosis Introduction ............................... 77
DTC Inspection Priority Chart ................................. 80
Fail-Safe Chart ....................................................... 82
Basic Inspection ..................................................... 83
Symptom Matrix Chart ............................................ 88
Engine Control Component Parts Location ............ 92
Circuit Diagram ....................................................... 98
ECM Harness Connector Terminal Layout ...........100
ECM Terminals and Reference Value ...................100
CONSULT-II Function ...........................................109
Generic Scan Tool (GST) Function .......................122
CONSULT-II Reference Value in Data Monitor .....125
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................129
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .131
Description ............................................................131
Testing Condition ..................................................131
Inspection Procedure ............................................131
Diagnostic Procedure ...........................................132
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................135
Description ............................................................135
Diagnostic Procedure ...........................................135
POWER SUPPLY AND GROUND CIRCUIT ...........136
Wiring Diagram .....................................................136
Diagnostic Procedure ...........................................137
Ground Inspection ................................................141
DTC U1000, U1001 CAN COMMUNICATION LINE .142
Description ............................................................142
On Board Diagnosis Logic ....................................142
DTC Confirmation Procedure ...............................142
Wiring Diagram .....................................................143
Diagnostic Procedure ...........................................144
DTC P0011, P0021 IVT CONTROL ........................145
Description ............................................................145
CONSULT-II Reference Value in Data Monitor Mode
.145
On Board Diagnosis Logic ....................................146

EC-2Revision: 2004 November 2004 FX35/FX45DTC Confirmation Procedure ...............................146
Diagnostic Procedure ...........................................148
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER .149
Description ............................................................149
CONSULT-II Reference Value in Data Monitor Mode
.149
On Board Diagnosis Logic ....................................149
DTC Confirmation Procedure ...............................150
Wiring Diagram .....................................................151
Diagnostic Procedure ...........................................154
Component Inspection ..........................................156
Removal and Installation ......................................156
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .157
Description ............................................................157
CONSULT-II Reference Value in Data Monitor Mode
.157
On Board Diagnosis Logic ....................................157
DTC Confirmation Procedure ...............................158
Wiring Diagram .....................................................159
Diagnostic Procedure ...........................................162
Component Inspection ..........................................164
Removal and Installation ......................................164
DTC P0101 MAF SENSOR .....................................165
Component Description ........................................165
CONSULT-II Reference Value in Data Monitor Mode
.165
On Board Diagnosis Logic ....................................165
DTC Confirmation Procedure ...............................166
Overall Function Check ........................................167
Wiring Diagram .....................................................168
Diagnostic Procedure ...........................................169
Component Inspection ..........................................172
Removal and Installation ......................................172
DTC P0102, P0103 MAF SENSOR .........................173
Component Description ........................................173
CONSULT-II Reference Value in Data Monitor Mode
.173
On Board Diagnosis Logic ....................................173
DTC Confirmation Procedure ...............................174
Wiring Diagram .....................................................175
Diagnostic Procedure ...........................................176
Component Inspection ..........................................179
Removal and Installation ......................................179
DTC P0112, P0113 IAT SENSOR ...........................180
Component Description ........................................180
On Board Diagnosis Logic ....................................180
DTC Confirmation Procedure ...............................180
Wiring Diagram .....................................................182
Diagnostic Procedure ...........................................183
Component Inspection ..........................................184
Removal and Installation ......................................184
DTC P0117, P0118 ECT SENSOR ..........................185
Component Description ........................................185
On Board Diagnosis Logic ....................................185
DTC Confirmation Procedure ...............................186
Wiring Diagram .....................................................187
Diagnostic Procedure ...........................................188
Component Inspection ..........................................189
Removal and Installation ......................................189DTC P0122, P0123 TP SENSOR ............................190
Component Description ........................................190
CONSULT-II Reference Value in Data Monitor Mode
.190
On Board Diagnosis Logic ....................................190
DTC Confirmation Procedure ................................191
Wiring Diagram .....................................................192
Diagnostic Procedure ............................................193
Component Inspection ..........................................196
Removal and Installation .......................................196
DTC P0125 ECT SENSOR ......................................197
Component Description ........................................197
On Board Diagnosis Logic ....................................197
DTC Confirmation Procedure ................................198
Diagnostic Procedure ............................................198
Component Inspection ..........................................199
Removal and Installation .......................................199
DTC P0127 IAT SENSOR ........................................200
Component Description ........................................200
On Board Diagnosis Logic ....................................200
DTC Confirmation Procedure ................................200
Diagnostic Procedure ............................................201
Component Inspection ..........................................202
Removal and Installation .......................................202
DTC P0128 THERMOSTAT FUNCTION .................203
On Board Diagnosis Logic ....................................203
DTC Confirmation Procedure ................................203
Diagnostic Procedure ............................................203
Component Inspection ..........................................204
Removal and Installation .......................................204
DTC P0132, P0152 HO2S1 .....................................205
Component Description ........................................205
CONSULT-II Reference Value in Data Monitor Mode
.205
On Board Diagnosis Logic ....................................205
DTC Confirmation Procedure ................................206
Wiring Diagram .....................................................207
Diagnostic Procedure ............................................210
Component Inspection ..........................................212
Removal and Installation .......................................213
DTC P0133, P0153 HO2S1 .....................................214
Component Description ........................................214
CONSULT-II Reference Value in Data Monitor Mode
.214
On Board Diagnosis Logic ....................................214
DTC Confirmation Procedure ................................215
Overall Function Check .........................................216
Wiring Diagram .....................................................217
Diagnostic Procedure ............................................220
Component Inspection ..........................................224
Removal and Installation .......................................225
DTC P0134, P0154 HO2S1 .....................................226
Component Description ........................................226
CONSULT-II Reference Value in Data Monitor Mode
.226
On Board Diagnosis Logic ....................................226
DTC Confirmation Procedure ................................227
Overall Function Check .........................................228
Wiring Diagram .....................................................229

EC-3
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ECA
Revision: 2004 November 2004 FX35/FX45Diagnostic Procedure ........................................... 232
Component Inspection ......................................... 234
Removal and Installation ...................................... 235
DTC P0138, P0158 HO2S2 .................................... 236
Component Description ........................................ 236
CONSULT-II Reference Value in Data Monitor Mode
. 236
On Board Diagnosis Logic ................................... 236
DTC Confirmation Procedure ............................... 237
Wiring Diagram .................................................... 238
Diagnostic Procedure ........................................... 241
Component Inspection ......................................... 243
Removal and Installation ...................................... 244
DTC P0139, P0159 HO2S2 .................................... 245
Component Description ........................................ 245
CONSULT-II Reference Value in Data Monitor Mode
. 245
On Board Diagnosis Logic ................................... 245
DTC Confirmation Procedure ............................... 246
Overall Function Check ........................................ 246
Wiring Diagram .................................................... 248
Diagnostic Procedure ........................................... 251
Component Inspection ......................................... 253
Removal and Installation ...................................... 255
DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION .............................................................. 256
On Board Diagnosis Logic ................................... 256
DTC Confirmation Procedure ............................... 256
Wiring Diagram .................................................... 258
Diagnostic Procedure ........................................... 260
DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION .............................................................. 265
On Board Diagnosis Logic ................................... 265
DTC Confirmation Procedure ............................... 265
Wiring Diagram .................................................... 267
Diagnostic Procedure ........................................... 269
DTC P0181 FTT SENSOR ...................................... 273
Component Description ........................................ 273
On Board Diagnosis Logic ................................... 273
DTC Confirmation Procedure ............................... 273
Wiring Diagram .................................................... 275
Diagnostic Procedure ........................................... 276
Component Inspection ......................................... 277
Removal and Installation ...................................... 278
DTC P0182, P0183 FTT SENSOR ......................... 279
Component Description ........................................ 279
On Board Diagnosis Logic ................................... 279
DTC Confirmation Procedure ............................... 279
Wiring Diagram .................................................... 280
Diagnostic Procedure ........................................... 281
Component Inspection ......................................... 282
Removal and Installation ...................................... 283
DTC P0222, P0223 TP SENSOR ........................... 284
Component Description ........................................ 284
CONSULT-II Reference Value in Data Monitor Mode
. 284
On Board Diagnosis Logic ................................... 284
DTC Confirmation Procedure ............................... 285
Wiring Diagram .................................................... 286Diagnostic Procedure ...........................................287
Component Inspection ..........................................290
Removal and Installation ......................................290
DTC P0300 - P0306 MULTIPLE CYLINDER MIS-
FIRE, NO. 1 - 6 CYLINDER MISFIRE .....................291
On Board Diagnosis Logic ....................................291
DTC Confirmation Procedure ...............................291
Diagnostic Procedure ...........................................292
DTC P0327, P0328 KS ...........................................297
Component Description ........................................297
On Board Diagnosis Logic ....................................297
DTC Confirmation Procedure ...............................297
Wiring Diagram .....................................................298
Diagnostic Procedure ...........................................299
Component Inspection ..........................................300
Removal and Installation ......................................301
DTC P0335 CKP SENSOR (POS) ..........................302
Component Description ........................................302
CONSULT-II Reference Value in Data Monitor Mode
.302
On Board Diagnosis Logic ....................................302
DTC Confirmation Procedure ...............................302
Wiring Diagram .....................................................303
Diagnostic Procedure ...........................................304
Component Inspection ..........................................307
Removal and Installation ......................................307
DTC P0340, P0345 CMP SENSOR (PHASE) ........308
Component Description ........................................308
CONSULT-II Reference Value in Data Monitor Mode
.308
On Board Diagnosis Logic ....................................308
DTC Confirmation Procedure ...............................308
Wiring Diagram .....................................................309
Diagnostic Procedure ...........................................312
Component Inspection ..........................................315
Removal and Installation ......................................315
DTC P0420, P0430 THREE WAY CATALYST FUNC-
TION ........................................................................316
On Board Diagnosis Logic ....................................316
DTC Confirmation Procedure ...............................316
Overall Function Check ........................................317
Diagnostic Procedure ...........................................318
DTC P0441 EVAP CONTROL SYSTEM .................321
System Description ...............................................321
On Board Diagnosis Logic ....................................321
DTC Confirmation Procedure ...............................321
Overall Function Check ........................................322
Diagnostic Procedure ...........................................323
DTC P0442 EVAP CONTROL SYSTEM .................326
On Board Diagnosis Logic ....................................326
DTC Confirmation Procedure ...............................327
Diagnostic Procedure ...........................................328
DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE ......................335
Description ............................................................335
CONSULT-II Reference Value in Data Monitor Mode
.335
On Board Diagnosis Logic ....................................336
DTC Confirmation Procedure ...............................336

EC-4Revision: 2004 November 2004 FX35/FX45Wiring Diagram .....................................................337
Diagnostic Procedure ...........................................339
Component Inspection ..........................................340
Removal and Installation ......................................341
DTC P0447 EVAP CANISTER VENT CONTROL
VALVE .....................................................................342
Component Description ........................................342
CONSULT-II Reference Value in Data Monitor Mode
.342
On Board Diagnosis Logic ....................................342
DTC Confirmation Procedure ...............................343
Wiring Diagram .....................................................344
Diagnostic Procedure ...........................................345
Component Inspection ..........................................347
DTC P0451 EVAP CONTROL SYSTEM PRESSURE
SENSOR ..................................................................349
Component Description ........................................349
CONSULT-II Reference Value in Data Monitor Mode
.349
On Board Diagnosis Logic ....................................349
DTC Confirmation Procedure ...............................350
Diagnostic Procedure ...........................................350
Component Inspection ..........................................351
DTC P0452 EVAP CONTROL SYSTEM PRESSURE
SENSOR ..................................................................352
Component Description ........................................352
CONSULT-II Reference Value in Data Monitor Mode
.352
On Board Diagnosis Logic ....................................352
DTC Confirmation Procedure ...............................353
Wiring Diagram .....................................................354
Diagnostic Procedure ...........................................355
Component Inspection ..........................................357
DTC P0453 EVAP CONTROL SYSTEM PRESSURE
SENSOR ..................................................................358
Component Description ........................................358
CONSULT-II Reference Value in Data Monitor Mode
.358
On Board Diagnosis Logic ....................................358
DTC Confirmation Procedure ...............................359
Wiring Diagram .....................................................360
Diagnostic Procedure ...........................................361
Component Inspection ..........................................365
DTC P0455 EVAP CONTROL SYSTEM .................366
On Board Diagnosis Logic ....................................366
DTC Confirmation Procedure ...............................367
Diagnostic Procedure ...........................................368
DTC P0456 EVAP CONTROL SYSTEM .................374
On Board Diagnosis Logic ....................................374
DTC Confirmation Procedure ...............................375
Overall Function Check ........................................376
Diagnostic Procedure ...........................................377
DTC P0460 FUEL LEVEL SENSOR .......................384
Component Description ........................................384
On Board Diagnosis Logic ....................................384
DTC Confirmation Procedure ...............................384
Diagnostic Procedure ...........................................385
Removal and Installation ......................................385DTC P0461 FUEL LEVEL SENSOR .......................386
Component Description ........................................386
On Board Diagnosis Logic ....................................386
Overall Function Check .........................................386
Diagnostic Procedure ............................................387
Removal and Installation .......................................387
DTC P0462, P0463 FUEL LEVEL SENSOR ...........388
Component Description ........................................388
On Board Diagnosis Logic ....................................388
DTC Confirmation Procedure ................................388
Diagnostic Procedure ............................................389
Removal and Installation .......................................389
DTC P0500 VSS ......................................................390
Description ............................................................390
On Board Diagnosis Logic ....................................390
DTC Confirmation Procedure ................................390
Overall Function Check .........................................390
Diagnostic Procedure ............................................391
DTC P0506 ISC SYSTEM .......................................392
Description ............................................................392
On Board Diagnosis Logic ....................................392
DTC Confirmation Procedure ................................392
Diagnostic Procedure ............................................393
DTC P0507 ISC SYSTEM .......................................394
Description ............................................................394
On Board Diagnosis Logic ....................................394
DTC Confirmation Procedure ................................394
Diagnostic Procedure ............................................395
DTC P0550 PSP SENSOR ......................................396
Component Description ........................................396
CONSULT-II Reference Value in Data Monitor Mode
.396
On Board Diagnosis Logic ....................................396
DTC Confirmation Procedure ................................396
Wiring Diagram .....................................................397
Diagnostic Procedure ............................................398
Component Inspection ..........................................400
Removal and Installation .......................................400
DTC P0605 ECM .....................................................401
Component Description ........................................401
On Board Diagnosis Logic ....................................401
DTC Confirmation Procedure ................................401
Diagnostic Procedure ............................................402
DTC P1065 ECM POWER SUPPLY ........................404
Component Description ........................................404
On Board Diagnosis Logic ....................................404
DTC Confirmation Procedure ................................404
Wiring Diagram .....................................................405
Diagnostic Procedure ............................................406
D T C P1111, P 1136 IVT CONTROL SOLENOID
VALVE ......................................................................408
Component Description ........................................408
CONSULT-II Reference Value in Data Monitor Mode
.408
On Board Diagnosis Logic ....................................408
DTC Confirmation Procedure ................................408
Wiring Diagram .....................................................409
Diagnostic Procedure ............................................412

EC-5
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Revision: 2004 November 2004 FX35/FX45Component Inspection ......................................... 414
Removal and Installation ...................................... 414
DTC P1121 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................ 415
Component Description ........................................ 415
On Board Diagnosis Logic ................................... 415
DTC Confirmation Procedure ............................... 415
Diagnostic Procedure ........................................... 416
DTC P1122 ELECTRIC THROTTLE CONTROL
FUNCTION .............................................................. 417
Description ........................................................... 417
On Board Diagnosis Logic ................................... 417
DTC Confirmation Procedure ............................... 417
Wiring Diagram .................................................... 418
Diagnostic Procedure ........................................... 419
Component Inspection ......................................... 422
Removal and Installation ...................................... 422
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .................................................................... 423
Component Description ........................................ 423
CONSULT-II Reference Value in Data Monitor Mode
. 423
On Board Diagnosis Logic ................................... 423
DTC Confirmation Procedure ............................... 423
Wiring Diagram .................................................... 425
Diagnostic Procedure ........................................... 426
DTC P1128 THROTTLE CONTROL MOTOR ........ 428
Component Description ........................................ 428
On Board Diagnosis Logic ................................... 428
DTC Confirmation Procedure ............................... 428
Wiring Diagram .................................................... 429
Diagnostic Procedure ........................................... 430
Component Inspection ......................................... 431
Removal and Installation ...................................... 432
DTC P1143, P1163 HO2S1 ..................................... 433
Component Description ........................................ 433
CONSULT-II Reference Value in Data Monitor Mode
. 433
On Board Diagnosis Logic ................................... 433
DTC Confirmation Procedure ............................... 434
Overall Function Check ........................................ 435
Diagnostic Procedure ........................................... 435
Component Inspection ......................................... 437
Removal and Installation ...................................... 438
DTC P1144, P1164 HO2S1 ..................................... 439
Component Description ........................................ 439
CONSULT-II Reference Value in Data Monitor Mode
. 439
On Board Diagnosis Logic ................................... 439
DTC Confirmation Procedure ............................... 440
Overall Function Check ........................................ 441
Diagnostic Procedure ........................................... 441
Component Inspection ......................................... 443
Removal and Installation ...................................... 445
DTC P1146, P1166 HO2S2 ..................................... 446
Component Description ........................................ 446
CONSULT-II Reference Value in Data Monitor Mode
. 446
On Board Diagnosis Logic ................................... 446DTC Confirmation Procedure ...............................447
Overall Function Check ........................................447
Wiring Diagram .....................................................449
Diagnostic Procedure ...........................................452
Component Inspection ..........................................454
Removal and Installation ......................................456
DTC P1147, P1167 HO2S2 .....................................457
Component Description ........................................457
CONSULT-II Reference Value in Data Monitor Mode
.457
On Board Diagnosis Logic ....................................457
DTC Confirmation Procedure ...............................458
Overall Function Check ........................................458
Wiring Diagram .....................................................460
Diagnostic Procedure ...........................................463
Component Inspection ..........................................465
Removal and Installation ......................................467
DTC P1148, P1168 CLOSED LOOP CONTROL ....468
On Board Diagnosis Logic ....................................468
DTC Confirmation Procedure ...............................468
Overall Function Check ........................................468
Diagnostic Procedure ...........................................469
DTC P1211 TCS CONTROL UNIT ..........................470
Description ............................................................470
On Board Diagnosis Logic ....................................470
DTC Confirmation Procedure ...............................470
Diagnostic Procedure ...........................................470
DTC P1212 TCS COMMUNICATION LINE ............471
Description ............................................................471
On Board Diagnosis Logic ....................................471
DTC Confirmation Procedure ...............................471
Diagnostic Procedure ...........................................471
DTC P1217 ENGINE OVER TEMPERATURE ........472
Description ............................................................472
CONSULT-II Reference Value in Data Monitor Mode
.475
On Board Diagnosis Logic ....................................475
Overall Function Check ........................................475
Wiring Diagram .....................................................477
Diagnostic Procedure ...........................................479
Main 12 Causes of Overheating ...........................484
Component Inspection ..........................................484
DTC P1225 TP SENSOR ........................................485
Component Description ........................................485
On Board Diagnosis Logic ....................................485
DTC Confirmation Procedure ...............................485
Diagnostic Procedure ...........................................486
Removal and Installation ......................................486
DTC P1226 TP SENSOR ........................................487
Component Description ........................................487
On Board Diagnosis Logic ....................................487
DTC Confirmation Procedure ...............................487
Diagnostic Procedure ...........................................488
Removal and Installation ......................................488
DTC P1229 SENSOR POWER SUPPLY ................489
On Board Diagnosis Logic ....................................489
DTC Confirmation Procedure ...............................489
Wiring Diagram .....................................................490
Diagnostic Procedure ...........................................491

EC-6Revision: 2004 November 2004 FX35/FX45 DTC P1444 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ...............................494
Description ............................................................494
CONSULT-II Reference Value in Data Monitor Mode
.494
On Board Diagnosis Logic ....................................495
DTC Confirmation Procedure ...............................495
Wiring Diagram .....................................................496
Diagnostic Procedure ...........................................498
Component Inspection ..........................................501
Removal and Installation ......................................501
DTC P1446 EVAP CANISTER VENT CONTROL
VALVE .....................................................................502
Component Description ........................................502
CONSULT-II Reference Value in Data Monitor Mode
.502
On Board Diagnosis Logic ....................................502
DTC Confirmation Procedure ...............................503
Wiring Diagram .....................................................504
Diagnostic Procedure ...........................................505
Component Inspection ..........................................506
DTC P1564 ICC STEERING SWITCH ....................508
Component Description ........................................508
CONSULT-II Reference Value in Data Monitor Mode
.508
On Board Diagnosis Logic ....................................508
DTC Confirmation Procedure ...............................508
Wiring Diagram .....................................................510
Diagnostic Procedure ...........................................511
Component Inspection ..........................................514
DTC P1564 ASCD STEERING SWITCH ................515
Component Description ........................................515
CONSULT-II Reference Value in Data Monitor Mode
.515
On Board Diagnosis Logic ....................................515
DTC Confirmation Procedure ...............................516
Wiring Diagram .....................................................517
Diagnostic Procedure ...........................................518
Component Inspection ..........................................520
DTC P1568 ICC FUNCTION ...................................521
On Board Diagnosis Logic ....................................521
DTC Confirmation Procedure ...............................521
Diagnostic Procedure ...........................................521
DTC P1572 ICC BRAKE SWITCH ..........................522
Component Description ........................................522
CONSULT-II Reference Value in Data Monitor Mode
.522
On Board Diagnosis Logic ....................................522
DTC Confirmation Procedure ...............................523
Wiring Diagram .....................................................524
Diagnostic Procedure ...........................................525
Component Inspection ..........................................530
DTC P1572 ASCD BRAKE SWITCH ......................532
Component Description ........................................532
CONSULT-II Reference Value in Data Monitor Mode
.532
On Board Diagnosis Logic ....................................532
DTC Confirmation Procedure ...............................533
Wiring Diagram .....................................................534Diagnostic Procedure ............................................535
Component Inspection ..........................................540
DTC P1574 ICC VEHICLE SPEED SENSOR .........541
Component Description ........................................541
On Board Diagnosis Logic ....................................541
DTC Confirmation Procedure ................................541
Diagnostic Procedure ............................................542
DTC P1574 ASCD VEHICLE SPEED SENSOR .....543
Component Description ........................................543
On Board Diagnosis Logic ....................................543
DTC Confirmation Procedure ................................543
Diagnostic Procedure ............................................544
DTC P1706 PNP SWITCH .......................................545
Component Description ........................................545
CONSULT-II Reference Value in Data Monitor Mode
.545
On Board Diagnosis Logic ....................................545
DTC Confirmation Procedure ................................545
Overall Function Check .........................................546
Wiring Diagram .....................................................547
Diagnostic Procedure ............................................548
DTC P1805 BRAKE SWITCH .................................550
Description ............................................................550
CONSULT-II Reference Value in Data Monitor Mode
.550
On Board Diagnosis Logic ....................................550
DTC Confirmation Procedure ................................550
Wiring Diagram .....................................................551
Diagnostic Procedure ............................................552
Component Inspection ..........................................554
DTC P2122, P2123 APP SENSOR .........................555
Component Description ........................................555
CONSULT-II Reference Value in Data Monitor Mode
.555
On Board Diagnosis Logic ....................................555
DTC Confirmation Procedure ................................556
Wiring Diagram .....................................................557
Diagnostic Procedure ............................................558
Component Inspection ..........................................560
Removal and Installation .......................................561
DTC P2127, P2128 APP SENSOR .........................562
Component Description ........................................562
CONSULT-II Reference Value in Data Monitor Mode
.562
On Board Diagnosis Logic ....................................562
DTC Confirmation Procedure ................................563
Wiring Diagram .....................................................564
Diagnostic Procedure ............................................565
Component Inspection ..........................................568
Removal and Installation .......................................568
DTC P2135 TP SENSOR ........................................569
Component Description ........................................569
CONSULT-II Reference Value in Data Monitor Mode
.569
On Board Diagnosis Logic ....................................569
DTC Confirmation Procedure ................................570
Wiring Diagram .....................................................571
Diagnostic Procedure ............................................572

EC-7
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Revision: 2004 November 2004 FX35/FX45Component Inspection ......................................... 575
Removal and Installation ...................................... 575
DTC P2138 APP SENSOR ..................................... 576
Component Description ........................................ 576
CONSULT-II Reference Value in Data Monitor Mode
. 576
On Board Diagnosis Logic ................................... 576
DTC Confirmation Procedure ............................... 577
Wiring Diagram .................................................... 578
Diagnostic Procedure ........................................... 579
Component Inspection ......................................... 584
Removal and Installation ...................................... 584
IGNITION SIGNAL .................................................. 585
Component Description ........................................ 585
Wiring Diagram .................................................... 586
Diagnostic Procedure ........................................... 591
Component Inspection ......................................... 595
Removal and Installation ...................................... 596
INJECTOR CIRCUIT ............................................... 597
Component Description ........................................ 597
CONSULT-II Reference Value in Data Monitor Mode
. 597
Wiring Diagram .................................................... 598
Diagnostic Procedure ........................................... 599
Component Inspection ......................................... 602
Removal and Installation ...................................... 602
FUEL PUMP CIRCUIT ............................................ 603
Description ........................................................... 603
CONSULT-II Reference Value in Data Monitor Mode
. 603
Wiring Diagram .................................................... 604
Diagnostic Procedure ........................................... 605
Component Inspection ......................................... 608
Removal and Installation ...................................... 608
REFRIGERANT PRESSURE SENSOR ................. 609
Component Description ........................................ 609
Wiring Diagram .................................................... 610
Diagnostic Procedure ............................................ 611
Removal and Installation ...................................... 613
ELECTRICAL LOAD SIGNAL ................................ 614
Description ........................................................... 614
CONSULT-II Reference Value in Data Monitor Mode
. 614
Diagnostic Procedure ........................................... 614
ICC BRAKE SWITCH ............................................. 615
Component Description ........................................ 615
CONSULT-II Reference Value in Data Monitor Mode
. 615
Wiring Diagram .................................................... 616
Diagnostic Procedure ........................................... 617
Component Inspection ......................................... 622
ASCD BRAKE SWITCH ......................................... 624
Component Description ........................................ 624
CONSULT-II Reference Value in Data Monitor Mode
. 624
Wiring Diagram .................................................... 625
Diagnostic Procedure ........................................... 626
Component Inspection ......................................... 631ASCD INDICATOR ..................................................632
Component Description ........................................632
CONSULT-II Reference Value in Data Monitor Mode
.632
Wiring Diagram .....................................................633
Diagnostic Procedure ...........................................634
SNOW MODE SWITCH ..........................................635
Description ............................................................635
CONSULT-II Reference Value in the Data Monitor
Mode .....................................................................635
Wiring Diagram .....................................................636
Diagnostic Procedure ...........................................637
Component Inspection ..........................................640
MIL AND DATA LINK CONNECTOR ......................641
Wiring Diagram .....................................................641
EVAPORATIVE EMISSION SYSTEM .....................643
Description ............................................................643
Component Inspection ..........................................646
Removal and Installation ......................................647
How to Detect Fuel Vapor Leakage ......................647
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ....................................................................650
System Description ...............................................650
Diagnostic Procedure ...........................................651
Component Inspection ..........................................653
POSITIVE CRANKCASE VENTILATION ...............655
Description ............................................................655
Component Inspection ..........................................655
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .657
System Description ...............................................657
Component Description ........................................659
SERVICE DATA AND SPECIFICATIONS (SDS) ....660
Fuel Pressure .......................................................660
Idle Speed and Ignition Timing .............................660
Calculated Load Value ..........................................660
Mass Air Flow Sensor ...........................................660
Intake Air Temperature Sensor .............................660
Engine Coolant Temperature Sensor ...................660
Heated Oxygen Sensor 1 Heater .........................660
Heated Oxygen sensor 2 Heater ..........................660
Crankshaft Position Sensor (POS) .......................660
Camshaft Position Sensor (PHASE) ....................660
Throttle Control Motor ...........................................660
Injector ..................................................................661
Fuel Pump ............................................................661
VK45DE
INDEX FOR DTC .....................................................662
Alphabetical Index ................................................662
DTC No. Index ......................................................665
PRECAUTIONS ......................................................670
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................670
On Board Diagnostic (OBD) System of Engine and
A/T ........................................................................670
Precaution ............................................................670
Wiring Diagrams and Trouble Diagnosis ..............673

EC-8Revision: 2004 November 2004 FX35/FX45 PREPARATION .......................................................674
Special Service Tools ...........................................674
Commercial Service Tools ....................................675
ENGINE CONTROL SYSTEM ................................676
System Diagram ...................................................676
Vacuum Hose Drawing .........................................677
System Chart ........................................................678
Multiport Fuel Injection (MFI) System ...................679
Electronic Ignition (EI) System .............................681
Nissan Torque Demand (NTD) Control System ....682
Air Conditioning Cut Control .................................683
Fuel Cut Control (at No Load and High Engine
Speed) ..................................................................683
CAN communication .............................................684
BASIC SERVICE PROCEDURE .............................685
Idle Speed and Ignition Timing Check ..................685
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment ............................................................687
Accelerator Pedal Released Position Learning ....698
Throttle Valve Closed Position Learning ...............698
Idle Air Volume Learning ......................................698
Fuel Pressure Check ............................................700
ON BOARD DIAGNOSTIC (OBD) SYSTEM ..........703
Introduction ...........................................................703
Two Trip Detection Logic ......................................703
Emission-related Diagnostic Information ..............704
IVIS (Infiniti Vehicle Immobilizer System — NATS) .717
Malfunction Indicator Lamp (MIL) .........................717
OBD System Operation Chart ..............................721
TROUBLE DIAGNOSIS ..........................................726
Trouble Diagnosis Introduction .............................726
DTC Inspection Priority Chart ...............................729
Fail-safe Chart ......................................................731
Basic Inspection ...................................................733
Symptom Matrix Chart ..........................................738
Engine Control Component Parts Location ..........742
Circuit Diagram .....................................................748
ECM Harness Connector Terminal Layout ...........750
ECM Terminals and Reference Value ...................750
CONSULT-II Function ...........................................759
Generic Scan Tool (GST) Function .......................772
CONSULT-II Reference Value in Data Monitor .....775
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................778
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .780
Description ............................................................780
Testing Condition ..................................................780
Inspection Procedure ............................................780
Diagnostic Procedure ...........................................781
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................784
Description ............................................................784
Diagnostic Procedure ...........................................784
POWER SUPPLY AND GROUND CIRCUIT ...........785
Wiring Diagram .....................................................785
Diagnostic Procedure ...........................................786
Ground Inspection ................................................791
DTC U1000, U1001 CAN COMMUNICATION LINE .792
Description ............................................................792On Board Diagnosis Logic ....................................792
DTC Confirmation Procedure ................................792
Wiring Diagram .....................................................793
Diagnostic Procedure ............................................794
DTC P0011, P0021 IVT CONTROL .........................795
Description ............................................................795
CONSULT-II Reference Value in Data Monitor Mode
.796
On Board Diagnosis Logic ....................................796
DTC Confirmation Procedure ................................797
Wiring Diagram .....................................................798
Diagnostic Procedure ............................................801
Component Inspection ..........................................805
Removal and Installation .......................................805
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER .806
Description ............................................................806
CONSULT-II Reference Value in Data Monitor Mode
.806
On Board Diagnosis Logic ....................................806
DTC Confirmation Procedure ................................807
Wiring Diagram .....................................................808
Diagnostic Procedure ............................................811
Component Inspection ..........................................813
Removal and Installation .......................................813
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .814
Description ............................................................814
CONSULT-II Reference Value in Data Monitor Mode
.814
On Board Diagnosis Logic ....................................814
DTC Confirmation Procedure ................................815
Wiring Diagram .....................................................816
Diagnostic Procedure ............................................819
Component Inspection ..........................................821
Removal and Installation .......................................821
DTC P0101 MAF SENSOR .....................................822
Component Description ........................................822
CONSULT-II Reference Value in Data Monitor Mode
.822
On Board Diagnosis Logic ....................................822
DTC Confirmation Procedure ................................823
Overall Function Check .........................................824
Wiring Diagram .....................................................825
Diagnostic Procedure ............................................826
Component Inspection ..........................................829
Removal and Installation .......................................829
DTC P0102, P0103 MAF SENSOR .........................830
Component Description ........................................830
CONSULT-II Reference Value in Data Monitor Mode
.830
On Board Diagnosis Logic ....................................830
DTC Confirmation Procedure ................................831
Wiring Diagram .....................................................832
Diagnostic Procedure ............................................833
Component Inspection ..........................................836
Removal and Installation .......................................836
DTC P0112, P0113 IAT SENSOR ............................837
Component Description ........................................837
On Board Diagnosis Logic ....................................837
DTC Confirmation Procedure ................................837