Infiniti M35/M45 Y50. Manual — part 382

EC-1

ENGINE CONTROL SYSTEM

B ENGINE

CONTENTS

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D

E

F

G

H

I

J

K

L

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SECTION

EC

A

EC

ENGINE CONTROL SYSTEM

VQ35DE

INDEX FOR DTC . . . . . . . . . . . . . .. 16

DTC No. Index . . . . . . . . . . . . . ... 16
Alphabetical Index . . . . . . . . . . . . .. 20

PRECAUTIONS . . . . . . . . . . . . . . 24

Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” . . . . . . . . . . . . . . . . 24
Precautions for Procedures without Cowl Top Cover

... 24

On Board Diagnostic (OBD) System of Engine and
A/T . . . . . . . . . . . . . . . . . . .. 24
Precaution . . . . . . . . . . . . . . . .. 25

PREPARATION . . . . . . . . . . . . . . . 28

Special Service Tools . . . . . . . . . . . . 28
Commercial Service Tools . . . . . . . . . .. 29

ENGINE CONTROL SYSTEM . . . . . . . . .. 30

System Diagram . . . . . . . . . . . . . . 30
Multiport Fuel Injection (MFI) System . . . . . 31
Electronic Ignition (EI) System . . . . . . . ... 33
Fuel Cut Control (At No Load and High Engine
Speed) . . . . . . . . . . . . . . . . . 34

AIR CONDITIONING CUT CONTROL . . . . . . 35

Input/Output Signal Chart . . . . . . . . . ... 35
System Description . . . . . . . . . . . . 35

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

... 36

System Description . . . . . . . . . . . . 36
Component Description . . . . . . . . . . .. 37

CAN COMMUNICATION . . . . . . . . . . .. 38

System Description . . . . . . . . . . . . 38

EVAPORATIVE EMISSION SYSTEM . . . . . ... 39

Description . . . . . . . . . . . . . . . . 39
Component Inspection . . . . . . . . . . ... 42
Removal and Installation . . . . . . . . . . 43
How to Detect Fuel Vapor Leakage . . . . . ... 43

ON BOARD REFUELING VAPOR RECOVERY
(ORVR) . . . . . . . . . . . . . . . . . .. 46

System Description . . . . . . . . . . . . 46
Diagnostic Procedure . . . . . . . . . . . . 47
Component Inspection . . . . . . . . . . ... 49

POSITIVE CRANKCASE VENTILATION . . . . . 51

Description . . . . . . . . . . . . . . . .. 51
Component Inspection . . . . . . . . . . . 51

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) . . . . . . . . . . . . . . . . . . 53

Description . . . . . . . . . . . . . . . .. 53

ON BOARD DIAGNOSTIC (OBD) SYSTEM . . . 54

Introduction . . . . . . . . . . . . . . . . 54
Two Trip Detection Logic . . . . . . . . . . 54
Emission-Related Diagnostic Information . . . ... 55
Malfunction Indicator Lamp (MIL) . . . . . . ... 70
OBD System Operation Chart . . . . . . . . 73

BASIC SERVICE PROCEDURE . . . . . . . ... 78

Basic Inspection . . . . . . . . . . . . . . 78
Idle Speed and Ignition Timing Check . . . . . 83
Procedure After Replacing ECM . . . . . . . 85
VIN Registration . . . . . . . . . . . . . . 85
Accelerator Pedal Released Position Learning . .. 86
Throttle Valve Closed Position Learning . . . . . 86
Idle Air Volume Learning . . . . . . . . . . 86
Fuel Pressure Check . . . . . . . . . . . .. 88

TROUBLE DIAGNOSIS . . . . . . . . . . . 90

Trouble Diagnosis Introduction . . . . . . . ... 90
DTC Inspection Priority Chart . . . . . . . . . 96
Fail-Safe Chart . . . . . . . . . . . . . ... 98
Symptom Matrix Chart . . . . . . . . . . . 99
Engine Control Component Parts Location . . .. 103
Vacuum Hose Drawing . . . . . . . . . . ..111
Circuit Diagram . . . . . . . . . . . . . . 112
ECM Harness Connector Terminal Layout . . ... 114
ECM Terminals and Reference Value . . . . ... 114
CONSULT-II Function (ENGINE) . . . . . . .. 123
Generic Scan Tool (GST) Function . . . . . ... 135
CONSULT-II Reference Value in Data Monitor . . 138
Major Sensor Reference Graph in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 141

TROUBLE DIAGNOSIS - SPECIFICATION VALUE .143

Description . . . . . . . . . . . . . . . 143
Testing Condition . . . . . . . . . . . . .. 143

EC-2

Inspection Procedure . . . . . . . . . . . 143
Diagnostic Procedure . . . . . . . . . . ... 144

TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT . . . . . . . . . . . . . . . . . ... 153

Description . . . . . . . . . . . . . . . 153
Diagnostic Procedure . . . . . . . . . . ... 153

POWER SUPPLY AND GROUND CIRCUIT . . ... 154

Wiring Diagram . . . . . . . . . . . . . . 154
Diagnostic Procedure . . . . . . . . . . ... 155
Ground Inspection . . . . . . . . . . . . 160

DTC U1000, U1001 CAN COMMUNICATION LINE .161

Description . . . . . . . . . . . . . . . 161
On Board Diagnosis Logic . . . . . . . . . 161
DTC Confirmation Procedure . . . . . . . ... 161
Wiring Diagram . . . . . . . . . . . . . . 162
Diagnostic Procedure . . . . . . . . . . ... 163

DTC U1010 CAN COMMUNICATION . . . . . . 164

Description . . . . . . . . . . . . . . . 164
On Board Diagnosis Logic . . . . . . . . . 164
DTC Confirmation Procedure . . . . . . . ... 164
Diagnostic Procedure . . . . . . . . . . ... 165

DTC P0011, P0021 IVT CONTROL . . . . . . 166

Description . . . . . . . . . . . . . . . 166
CONSULT-II Reference Value in Data Monitor Mode

. 166

On Board Diagnosis Logic . . . . . . . . . 167
DTC Confirmation Procedure . . . . . . . ... 167
Diagnostic Procedure . . . . . . . . . . ... 168
Component Inspection . . . . . . . . . . .. 169
Removal and Installation . . . . . . . . . .. 169

DTC P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER . . . . . . . . . . . . . . . . .. 170

Description . . . . . . . . . . . . . . . 170
CONSULT-II Reference Value in Data Monitor Mode

. 170

On Board Diagnosis Logic . . . . . . . . . 170
DTC Confirmation Procedure . . . . . . . ... 170
Wiring Diagram . . . . . . . . . . . . . . 171
Diagnostic Procedure . . . . . . . . . . ... 174
Component Inspection . . . . . . . . . . .. 176
Removal and Installation . . . . . . . . . .. 176

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .177

Description . . . . . . . . . . . . . . . 177
CONSULT-II Reference Value in Data Monitor Mode

. 177

On Board Diagnosis Logic . . . . . . . . . 177
DTC Confirmation Procedure . . . . . . . ... 178
Wiring Diagram . . . . . . . . . . . . . . 179
Diagnostic Procedure . . . . . . . . . . ... 182
Component Inspection . . . . . . . . . . .. 184
Removal and Installation . . . . . . . . . .. 184

DTC P0075, P0081 IVT CONTROL SOLENOID
VALVE . . . . . . . . . . . . . . . . . . 185

Component Description . . . . . . . . . . 185
CONSULT-II Reference Value in Data Monitor Mode

. 185

On Board Diagnosis Logic . . . . . . . . . 185
DTC Confirmation Procedure . . . . . . . ... 185
Wiring Diagram . . . . . . . . . . . . . . 186

Diagnostic Procedure . . . . . . . . . . . 190
Component Inspection . . . . . . . . . . ..192
Removal and Installation . . . . . . . . . ...192

DTC P0101 MAF SENSOR . . . . . . . . . .193

Component Description . . . . . . . . . . 193
CONSULT-II Reference Value in Data Monitor Mode

.193

On Board Diagnosis Logic . . . . . . . . . 193
DTC Confirmation Procedure . . . . . . . . 194
Overall Function Check . . . . . . . . . . .195
Wiring Diagram . . . . . . . . . . . . . .196
Diagnostic Procedure . . . . . . . . . . . 197
Component Inspection . . . . . . . . . . ..200
Removal and Installation . . . . . . . . . ...201

DTC P0102, P0103 MAF SENSOR . . . . . . .202

Component Description . . . . . . . . . . 202
CONSULT-II Reference Value in Data Monitor Mode

.202

On Board Diagnosis Logic . . . . . . . . . 202
DTC Confirmation Procedure . . . . . . . . 203
Wiring Diagram . . . . . . . . . . . . . .204
Diagnostic Procedure . . . . . . . . . . . 205
Component Inspection . . . . . . . . . . ..207
Removal and Installation . . . . . . . . . ...208

DTC P0112, P0113 IAT SENSOR . . . . . . . 209

Component Description . . . . . . . . . . 209
On Board Diagnosis Logic . . . . . . . . . 209
DTC Confirmation Procedure . . . . . . . . 209
Wiring Diagram . . . . . . . . . . . . . . 211
Diagnostic Procedure . . . . . . . . . . . 212
Component Inspection . . . . . . . . . . ..213
Removal and Installation . . . . . . . . . ...213

DTC P0117, P0118 ECT SENSOR . . . . . . ..214

Component Description . . . . . . . . . . 214
On Board Diagnosis Logic . . . . . . . . . 214
DTC Confirmation Procedure . . . . . . . . 215
Wiring Diagram . . . . . . . . . . . . . .216
Diagnostic Procedure . . . . . . . . . . . 217
Component Inspection . . . . . . . . . . ..218
Removal and Installation . . . . . . . . . ...218

DTC P0122, P0123 TP SENSOR . . . . . . . 219

Component Description . . . . . . . . . . 219
CONSULT-II Reference Value in Data Monitor Mode

.219

On Board Diagnosis Logic . . . . . . . . . 219
DTC Confirmation Procedure . . . . . . . . 220
Wiring Diagram . . . . . . . . . . . . . .221
Diagnostic Procedure . . . . . . . . . . . 222
Component Inspection . . . . . . . . . . ..225
Removal and Installation . . . . . . . . . ...225

DTC P0125 ECT SENSOR . . . . . . . . . ..226

Component Description . . . . . . . . . . 226
On Board Diagnosis Logic . . . . . . . . . 226
DTC Confirmation Procedure . . . . . . . . 227
Diagnostic Procedure . . . . . . . . . . . 227
Component Inspection . . . . . . . . . . ..228
Removal and Installation . . . . . . . . . ...228

DTC P0127 IAT SENSOR . . . . . . . . . . 229

Component Description . . . . . . . . . . 229

EC-3

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M

EC

A

On Board Diagnosis Logic . . . . . . . . ... 229
DTC Confirmation Procedure . . . . . . . ... 229
Diagnostic Procedure . . . . . . . . . . ... 230
Component Inspection . . . . . . . . . . . 231
Removal and Installation . . . . . . . . . .. 231

DTC P0128 THERMOSTAT FUNCTION . . . . 232

On Board Diagnosis Logic . . . . . . . . ... 232
DTC Confirmation Procedure . . . . . . . ... 232
Diagnostic Procedure . . . . . . . . . . ... 232
Component Inspection . . . . . . . . . . . 233
Removal and Installation . . . . . . . . . .. 233

DTC P0130, P0150 A/F SENSOR 1 . . . . . ... 234

Component Description . . . . . . . . . . 234
CONSULT-II Reference Value in Data Monitor Mode

. 234

On Board Diagnosis Logic . . . . . . . . ... 234
DTC Confirmation Procedure . . . . . . . ... 234
Overall Function Check . . . . . . . . . . 236
Wiring Diagram . . . . . . . . . . . . . 237
Diagnostic Procedure . . . . . . . . . . ... 240
Removal and Installation . . . . . . . . . .. 243

DTC P0131, P0151 A/F SENSOR 1 . . . . . ... 244

Component Description . . . . . . . . . . 244
CONSULT-II Reference Value in Data Monitor Mode

. 244

On Board Diagnosis Logic . . . . . . . . ... 244
DTC Confirmation Procedure . . . . . . . ... 244
Wiring Diagram . . . . . . . . . . . . . 246
Diagnostic Procedure . . . . . . . . . . ... 249
Removal and Installation . . . . . . . . . .. 252

DTC P0132, P0152 A/F SENSOR 1 . . . . . ... 253

Component Description . . . . . . . . . . 253
CONSULT-II Reference Value in Data Monitor Mode

. 253

On Board Diagnosis Logic . . . . . . . . ... 253
DTC Confirmation Procedure . . . . . . . ... 253
Wiring Diagram . . . . . . . . . . . . . 255
Diagnostic Procedure . . . . . . . . . . ... 258
Removal and Installation . . . . . . . . . .. 261

DTC P0133, P0153 A/F SENSOR 1 . . . . . ... 262

Component Description . . . . . . . . . . 262
CONSULT-II Reference Value in Data Monitor Mode

. 262

On Board Diagnosis Logic . . . . . . . . ... 262
DTC Confirmation Procedure . . . . . . . ... 263
Wiring Diagram . . . . . . . . . . . . . 265
Diagnostic Procedure . . . . . . . . . . ... 268
Removal and Installation . . . . . . . . . .. 273

DTC P0137, P0157 HO2S2 . . . . . . . . . 274

Component Description . . . . . . . . . . 274
CONSULT-II Reference Value in Data Monitor Mode

. 274

On Board Diagnosis Logic . . . . . . . . ... 274
DTC Confirmation Procedure . . . . . . . ... 275
Overall Function Check . . . . . . . . . . 275
Wiring Diagram . . . . . . . . . . . . . 277
Diagnostic Procedure . . . . . . . . . . ... 280
Component Inspection . . . . . . . . . . . 282
Removal and Installation . . . . . . . . . .. 284

DTC P0138, P0158 HO2S2 . . . . . . . . . . 285

Component Description . . . . . . . . . . 285
CONSULT-II Reference Value in Data Monitor Mode

. 285

On Board Diagnosis Logic . . . . . . . . . 285
DTC Confirmation Procedure . . . . . . . ... 286
Overall Function Check . . . . . . . . . . 287
Wiring Diagram . . . . . . . . . . . . . . 288
Diagnostic Procedure . . . . . . . . . . ... 291
Component Inspection . . . . . . . . . . .. 295
Removal and Installation . . . . . . . . . .. 297

DTC P0139, P0159 HO2S2 . . . . . . . . . . 298

Component Description . . . . . . . . . . 298
CONSULT-II Reference Value in Data Monitor Mode

. 298

On Board Diagnosis Logic . . . . . . . . . 298
DTC Confirmation Procedure . . . . . . . ... 299
Overall Function Check . . . . . . . . . . 299
Wiring Diagram . . . . . . . . . . . . . . 301
Diagnostic Procedure . . . . . . . . . . ... 304
Component Inspection . . . . . . . . . . .. 306
Removal and Installation . . . . . . . . . .. 308

DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . . . .. 309

On Board Diagnosis Logic . . . . . . . . . 309
DTC Confirmation Procedure . . . . . . . ... 309
Wiring Diagram . . . . . . . . . . . . . . 311
Diagnostic Procedure . . . . . . . . . . ... 315

DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . . . .. 320

On Board Diagnosis Logic . . . . . . . . . 320
DTC Confirmation Procedure . . . . . . . ... 320
Wiring Diagram . . . . . . . . . . . . . . 322
Diagnostic Procedure . . . . . . . . . . ... 326

DTC P0181 FTT SENSOR . . . . . . . . . .. 331

Component Description . . . . . . . . . . 331
On Board Diagnosis Logic . . . . . . . . . 331
DTC Confirmation Procedure . . . . . . . ... 331
Wiring Diagram . . . . . . . . . . . . . . 333
Diagnostic Procedure . . . . . . . . . . ... 334
Component Inspection . . . . . . . . . . .. 336
Removal and Installation . . . . . . . . . .. 336

DTC P0182, P0183 FTT SENSOR . . . . . . .. 337

Component Description . . . . . . . . . . 337
On Board Diagnosis Logic . . . . . . . . . 337
DTC Confirmation Procedure . . . . . . . ... 337
Wiring Diagram . . . . . . . . . . . . . . 338
Diagnostic Procedure . . . . . . . . . . ... 339
Component Inspection . . . . . . . . . . .. 341
Removal and Installation . . . . . . . . . .. 341

DTC P0222, P0223 TP SENSOR . . . . . . . 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

EC-4

Component Inspection . . . . . . . . . . .. 348
Removal and Installation . . . . . . . . . .. 348

DTC P0300 - P0306 MULTIPLE CYLINDER MIS-
FIRE, NO. 1 - 6 CYLINDER MISFIRE . . . . . . 349

On Board Diagnosis Logic . . . . . . . . . 349
DTC Confirmation Procedure . . . . . . . ... 349
Diagnostic Procedure . . . . . . . . . . ... 350

DTC P0327, P0328 KS . . . . . . . . . . . 359

Component Description . . . . . . . . . . 359
On Board Diagnosis Logic . . . . . . . . . 359
DTC Confirmation Procedure . . . . . . . ... 359
Wiring Diagram . . . . . . . . . . . . . . 360
Diagnostic Procedure . . . . . . . . . . ... 361
Component Inspection . . . . . . . . . . .. 363
Removal and Installation . . . . . . . . . .. 363

DTC P0335 CKP SENSOR (POS) . . . . . . .. 364

Component Description . . . . . . . . . . 364
CONSULT-II Reference Value in Data Monitor Mode

. 364

On Board Diagnosis Logic . . . . . . . . . 364
DTC Confirmation Procedure . . . . . . . ... 365
Wiring Diagram . . . . . . . . . . . . . . 366
Diagnostic Procedure . . . . . . . . . . ... 367
Component Inspection . . . . . . . . . . .. 370
Removal and Installation . . . . . . . . . .. 370

DTC P0340, P0345 CMP SENSOR (PHASE) . . . 371

Component Description . . . . . . . . . . 371
CONSULT-II Reference Value in Data Monitor Mode

. 371

On Board Diagnosis Logic . . . . . . . . . 371
DTC Confirmation Procedure . . . . . . . ... 371
Wiring Diagram . . . . . . . . . . . . . . 373
Diagnostic Procedure . . . . . . . . . . ... 376
Component Inspection . . . . . . . . . . .. 379
Removal and Installation . . . . . . . . . .. 379

DTC P0420, P0430 THREE WAY CATALYST FUNC-
TION . . . . . . . . . . . . . . . . . . 380

On Board Diagnosis Logic . . . . . . . . . 380
DTC Confirmation Procedure . . . . . . . ... 380
Overall Function Check . . . . . . . . . . 381
Diagnostic Procedure . . . . . . . . . . ... 382

DTC P0441 EVAP CONTROL SYSTEM . . . . . 386

System Description . . . . . . . . . . . ... 386
On Board Diagnosis Logic . . . . . . . . . 386
DTC Confirmation Procedure . . . . . . . ... 386
Overall Function Check . . . . . . . . . . 387
Diagnostic Procedure . . . . . . . . . . ... 388

DTC P0442 EVAP CONTROL SYSTEM . . . . . 391

On Board Diagnosis Logic . . . . . . . . . 391
DTC Confirmation Procedure . . . . . . . ... 392
Diagnostic Procedure . . . . . . . . . . ... 393

DTC P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE . . . . . . . ... 400

Description . . . . . . . . . . . . . . . 400
CONSULT-II Reference Value in Data Monitor Mode

. 400

On Board Diagnosis Logic . . . . . . . . . 401
DTC Confirmation Procedure . . . . . . . ... 401
Wiring Diagram . . . . . . . . . . . . . . 402

Diagnostic Procedure . . . . . . . . . . . 404
Component Inspection . . . . . . . . . . ..407
Removal and Installation . . . . . . . . . ...407

DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE . . . . . ..408

Description . . . . . . . . . . . . . . . 408
CONSULT-II Reference Value in Data Monitor Mode

.408

On Board Diagnosis Logic . . . . . . . . . 409
DTC Confirmation Procedure . . . . . . . . 409
Wiring Diagram . . . . . . . . . . . . . .410
Diagnostic Procedure . . . . . . . . . . . 412
Component Inspection . . . . . . . . . . ..413
Removal and Installation . . . . . . . . . ...414

DTC P0447 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . . . ..415

Component Description . . . . . . . . . . 415
CONSULT-II Reference Value in Data Monitor Mode

.415

On Board Diagnosis Logic . . . . . . . . . 415
DTC Confirmation Procedure . . . . . . . . 416
Wiring Diagram . . . . . . . . . . . . . .417
Diagnostic Procedure . . . . . . . . . . . 418
Component Inspection . . . . . . . . . . ..420

DTC P0448 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . . . ..422

Component Description . . . . . . . . . . 422
CONSULT-II Reference Value in Data Monitor Mode

.422

On Board Diagnosis Logic . . . . . . . . . 422
DTC Confirmation Procedure . . . . . . . . 423
Wiring Diagram . . . . . . . . . . . . . .424
Diagnostic Procedure . . . . . . . . . . . 425
Component Inspection . . . . . . . . . . ..426

DTC P0451 EVAP CONTROL SYSTEM PRESSURE
SENSOR . . . . . . . . . . . . . . . . ..428

Component Description . . . . . . . . . . 428
CONSULT-II Reference Value in Data Monitor Mode

.428

On Board Diagnosis Logic . . . . . . . . . 428
DTC Confirmation Procedure . . . . . . . . 429
Diagnostic Procedure . . . . . . . . . . . 429
Component Inspection . . . . . . . . . . ..430

DTC P0452 EVAP CONTROL SYSTEM PRESSURE
SENSOR . . . . . . . . . . . . . . . . ..431

Component Description . . . . . . . . . . 431
CONSULT-II Reference Value in Data Monitor Mode

.431

On Board Diagnosis Logic . . . . . . . . . 431
DTC Confirmation Procedure . . . . . . . . 432
Wiring Diagram . . . . . . . . . . . . . .433
Diagnostic Procedure . . . . . . . . . . . 434
Component Inspection . . . . . . . . . . ..436

DTC P0453 EVAP CONTROL SYSTEM PRESSURE
SENSOR . . . . . . . . . . . . . . . . ..437

Component Description . . . . . . . . . . 437
CONSULT-II Reference Value in Data Monitor Mode

.437

On Board Diagnosis Logic . . . . . . . . . 437