Infiniti M45 (Y34). Manual — part 328

EC-1

ENGINE CONTROL SYSTEM

B ENGINE

CONTENTS

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SECTION

EC

A

EC

ENGINE CONTROL SYSTEM

INDEX FOR DTC . . . . . . . . . . . . . . 9

Alphabetical Index . . . . . . . . . . . . . 9
DTC No. Index . . . . . . . . . . . . . ... 13

PRECAUTIONS . . . . . . . . . . . . . . 17

Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” . . . . . . . . . . . . . . . . 17
On Board Diagnostic (OBD) System of Engine and
A/T . . . . . . . . . . . . . . . . . . .. 17
Precaution . . . . . . . . . . . . . . . .. 17
Wiring Diagrams and Trouble Diagnosis . . . . 20

PREPARATION . . . . . . . . . . . . . . . 21

Special Service Tools . . . . . . . . . . . . 21
Commercial Service Tools . . . . . . . . . .. 21

ENGINE CONTROL SYSTEM . . . . . . . . .. 23

System Diagram . . . . . . . . . . . . . . 23
Vacuum Hose Drawing . . . . . . . . . . ... 24
System Chart . . . . . . . . . . . . . . . 25
Multiport Fuel Injection (MFI) System . . . . . 26
Electronic Ignition (EI) System . . . . . . . ... 28
Nissan Torque Demand (NTD) Control System . . 29
Air Conditioning Cut Control . . . . . . . . ... 30
Fuel Cut Control (at No Load and High Engine
Speed) . . . . . . . . . . . . . . . . . 30
CAN Communication . . . . . . . . . . . .. 30

BASIC SERVICE PROCEDURE . . . . . . . .. 32

Idle Speed and Ignition Timing Check . . . . . 32
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment . . . . . . . . . . . . . . . . 33
Accelerator Pedal Released Position Learning . .. 44
Throttle Valve Closed Position Learning . . . . 44
Idle Air Volume Learning . . . . . . . . . . 44
Fuel Pressure Check . . . . . . . . . . . .. 46

ON BOARD DIAGNOSTIC (OBD) SYSTEM . . . 49

Introduction . . . . . . . . . . . . . . . 49
Two Trip Detection Logic . . . . . . . . . . 49
Emission-Related Diagnostic Information . . . .. 50
IVIS (Infiniti Vehicle Immobilizer System — NATS)

... 64

Malfunction Indicator Lamp (MIL) . . . . . . ... 64
OBD System Operation Chart . . . . . . . . 68

TROUBLE DIAGNOSIS . . . . . . . . . . . 73

Trouble Diagnosis Introduction . . . . . . . ... 73
DTC Inspection Priority Chart . . . . . . . . . 78
Fail-Safe Chart . . . . . . . . . . . . . ... 80
Basic Inspection . . . . . . . . . . . . . . 81
Symptom Matrix Chart . . . . . . . . . . . 86
Engine Control Component Parts Location . . . 90
Circuit Diagram . . . . . . . . . . . . . ... 96
ECM Harness Connector Terminal Layout . . . . 98
ECM Terminals and Reference Value . . . . . . 98
CONSULT-II Function (ENGINE) . . . . . . .. 108
Generic Scan Tool (GST) Function . . . . . ... 121
CONSULT-II Reference Value in Data Monitor Mode

. 123

Major Sensor Reference Graph in Data Monitor
Mode . . . . . . . . . . . . . . . . . . 126

TROUBLE DIAGNOSIS - SPECIFICATION VALUE .128

Description . . . . . . . . . . . . . . . 128
Testing Condition . . . . . . . . . . . . .. 128
Inspection Procedure . . . . . . . . . . . 128
Diagnostic Procedure . . . . . . . . . . ... 129

TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT . . . . . . . . . . . . . . . . . ... 132

Description . . . . . . . . . . . . . . . 132
Diagnostic Procedure . . . . . . . . . . ... 132

POWER SUPPLY AND GROUND CIRCUIT . . ... 133

Wiring Diagram . . . . . . . . . . . . . . 133
Diagnostic Procedure . . . . . . . . . . ... 136
Ground Inspection . . . . . . . . . . . . 141
Component Inspection . . . . . . . . . . .. 142

DTC U1000, U1001 CAN COMMUNICATION LINE .143

Description . . . . . . . . . . . . . . . 143
On Board Diagnosis Logic . . . . . . . . . 143
DTC Confirmation Procedure . . . . . . . ... 143
Wiring Diagram . . . . . . . . . . . . . . 144
Diagnostic Procedure . . . . . . . . . . ... 145

DTC P0011, P0021 IVT CONTROL . . . . . . 146

Description . . . . . . . . . . . . . . . 146
CONSULT-II Reference Value in Data Monitor Mode

. 147

EC-2

On Board Diagnosis Logic . . . . . . . . . 147
DTC Confirmation Procedure . . . . . . . ... 148
Wiring Diagram . . . . . . . . . . . . . . 149
Diagnostic Procedure . . . . . . . . . . ... 152
Component Inspection . . . . . . . . . . .. 155
Removal and Installation . . . . . . . . . .. 156

DTC P0031, P0032, P0051, P0052 HO2S1 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 P0037, P0038, P0057, P0058 HO2S2 HEATER .165

Description . . . . . . . . . . . . . . . 165
CONSULT-II Reference Value in Data Monitor Mode

. 165

On Board Diagnosis Logic . . . . . . . . . 165
DTC Confirmation Procedure . . . . . . . ... 166
Wiring Diagram . . . . . . . . . . . . . . 167
Diagnostic Procedure . . . . . . . . . . ... 170
Component Inspection . . . . . . . . . . .. 173
Removal and Installation . . . . . . . . . .. 173

DTC P0101 MAF SENSOR . . . . . . . . . . 174

Component Description . . . . . . . . . . 174
CONSULT-II Reference Value in Data Monitor Mode

. 174

On Board Diagnosis Logic . . . . . . . . . 174
DTC Confirmation Procedure . . . . . . . ... 175
Overall Function Check . . . . . . . . . . 176
Wiring Diagram . . . . . . . . . . . . . . 177
Diagnostic Procedure . . . . . . . . . . ... 178
Component Inspection . . . . . . . . . . .. 181
Removal and Installation . . . . . . . . . .. 181

DTC P0102, P0103 MAF SENSOR . . . . . . . 182

Component Description . . . . . . . . . . 182
CONSULT-II Reference Value in Data Monitor Mode

. 182

On Board Diagnosis Logic . . . . . . . . . 182
DTC Confirmation Procedure . . . . . . . ... 183
Wiring Diagram . . . . . . . . . . . . . . 184
Diagnostic Procedure . . . . . . . . . . ... 185
Component Inspection . . . . . . . . . . .. 188
Removal and Installation . . . . . . . . . .. 188

DTC P0112, P0113 IAT SENSOR . . . . . . ... 189

Component Description . . . . . . . . . . 189
On Board Diagnosis Logic . . . . . . . . . 189
DTC Confirmation Procedure . . . . . . . ... 189
Wiring Diagram . . . . . . . . . . . . . . 190
Diagnostic Procedure . . . . . . . . . . ... 191
Component Inspection . . . . . . . . . . .. 192
Removal and Installation . . . . . . . . . .. 192

DTC P0117, P0118 ECT SENSOR . . . . . . .. 193

Component Description . . . . . . . . . . 193
On Board Diagnosis Logic . . . . . . . . . 193
DTC Confirmation Procedure . . . . . . . ... 194

Wiring Diagram . . . . . . . . . . . . . .195
Diagnostic Procedure . . . . . . . . . . . 196
Component Inspection . . . . . . . . . . ..197
Removal and Installation . . . . . . . . . ...198

DTC P0122, P0123 TP SENSOR . . . . . . . 199

Component Description . . . . . . . . . . 199
CONSULT-II Reference Value in Data Monitor Mode

.199

On Board Diagnosis Logic . . . . . . . . . 199
DTC Confirmation Procedure . . . . . . . . 200
Wiring Diagram . . . . . . . . . . . . . .201
Diagnostic Procedure . . . . . . . . . . . 202
Component Inspection . . . . . . . . . . ..204
Removal and Installation . . . . . . . . . ...204

DTC P0125 ECT SENSOR . . . . . . . . . ..205

Component Description . . . . . . . . . . 205
On Board Diagnosis Logic . . . . . . . . . 205
DTC Confirmation Procedure . . . . . . . . 206
Diagnostic Procedure . . . . . . . . . . . 206
Component Inspection . . . . . . . . . . ..207
Removal and Installation . . . . . . . . . ...207

DTC P0127 IAT SENSOR . . . . . . . . . . 208

Component Description . . . . . . . . . . 208
On Board Diagnosis Logic . . . . . . . . . 208
DTC Confirmation Procedure . . . . . . . . 209
Diagnostic Procedure . . . . . . . . . . . 210
Component Inspection . . . . . . . . . . ..210
Removal and Installation . . . . . . . . . ... 211

DTC P0128 THERMOSTAT FUNCTION . . . . .212

On Board Diagnosis Logic . . . . . . . . . 212
DTC Confirmation Procedure . . . . . . . . 212
Diagnostic Procedure . . . . . . . . . . . 212
Component Inspection . . . . . . . . . . ..213
Removal and Installation . . . . . . . . . ...213

DTC P0132, P0152 HO2S1 . . . . . . . . . .214

Component Description . . . . . . . . . . 214
CONSULT-II Reference Value in Data Monitor Mode

.214

On Board Diagnosis Logic . . . . . . . . . 214
DTC Confirmation Procedure . . . . . . . . 215
Wiring Diagram . . . . . . . . . . . . . .216
Diagnostic Procedure . . . . . . . . . . . 219
Component Inspection . . . . . . . . . . ..222
Removal and Installation . . . . . . . . . ...223

DTC P0133, P0153 HO2S1 . . . . . . . . . .224

Component Description . . . . . . . . . . 224
CONSULT-II Reference Value in Data Monitor Mode

.224

On Board Diagnosis Logic . . . . . . . . . 224
DTC Confirmation Procedure . . . . . . . . 225
Overall Function Check . . . . . . . . . . .226
Wiring Diagram . . . . . . . . . . . . . .227
Diagnostic Procedure . . . . . . . . . . . 230
Component Inspection . . . . . . . . . . ..234
Removal and Installation . . . . . . . . . ...235

DTC P0134, P0154 HO2S1 . . . . . . . . . .236

Component Description . . . . . . . . . . 236
CONSULT-II Reference Value in Data Monitor Mode

.236

EC-3

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EC

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On Board Diagnosis Logic . . . . . . . . ... 236
DTC Confirmation Procedure . . . . . . . ... 237
Overall Function Check . . . . . . . . . . 238
Wiring Diagram . . . . . . . . . . . . . 239
Diagnostic Procedure . . . . . . . . . . ... 242
Component Inspection . . . . . . . . . . . 243
Removal and Installation . . . . . . . . . .. 244

DTC P0138, P0158 HO2S2 . . . . . . . . . 245

Component Description . . . . . . . . . . 245
CONSULT-II Reference Value in Data Monitor Mode

. 245

On Board Diagnosis Logic . . . . . . . . ... 245
DTC Confirmation Procedure . . . . . . . ... 246
Wiring Diagram . . . . . . . . . . . . . 247
Diagnostic Procedure . . . . . . . . . . ... 250
Component Inspection . . . . . . . . . . . 252
Removal and Installation . . . . . . . . . .. 253

DTC P0139, P0159 HO2S2 . . . . . . . . . 254

Component Description . . . . . . . . . . 254
CONSULT-II Reference Value in Data Monitor Mode

. 254

On Board Diagnosis Logic . . . . . . . . ... 254
DTC Confirmation Procedure . . . . . . . ... 255
Overall Function Check . . . . . . . . . . 255
Wiring Diagram . . . . . . . . . . . . . 257
Diagnostic Procedure . . . . . . . . . . ... 260
Component Inspection . . . . . . . . . . . 263
Removal and Installation . . . . . . . . . .. 265

DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . . . .. 266

On Board Diagnosis Logic . . . . . . . . ... 266
DTC Confirmation Procedure . . . . . . . ... 266
Wiring Diagram . . . . . . . . . . . . . 268
Diagnostic Procedure . . . . . . . . . . ... 270

DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . . . .. 275

On Board Diagnosis Logic . . . . . . . . ... 275
DTC Confirmation Procedure . . . . . . . ... 275
Wiring Diagram . . . . . . . . . . . . . 277
Diagnostic Procedure . . . . . . . . . . ... 279

DTC P0181 FTT SENSOR . . . . . . . . . .. 283

Component Description . . . . . . . . . . 283
On Board Diagnosis Logic . . . . . . . . ... 283
DTC Confirmation Procedure . . . . . . . ... 283
Wiring Diagram . . . . . . . . . . . . . 285
Diagnostic Procedure . . . . . . . . . . ... 286
Component Inspection . . . . . . . . . . . 287
Removal and Installation . . . . . . . . . .. 287

DTC P0182, P0183 FTT SENSOR . . . . . . . 288

Component Description . . . . . . . . . . 288
On Board Diagnosis Logic . . . . . . . . ... 288
DTC Confirmation Procedure . . . . . . . ... 288
Wiring Diagram . . . . . . . . . . . . . 289
Diagnostic Procedure . . . . . . . . . . ... 290
Component Inspection . . . . . . . . . . . 291
Removal and Installation . . . . . . . . . .. 291

DTC P0222, P0223 TP SENSOR . . . . . . ... 292

Component Description . . . . . . . . . . 292
CONSULT-II Reference Value in Data Monitor Mode

. 292

On Board Diagnosis Logic . . . . . . . . . 292
DTC Confirmation Procedure . . . . . . . ... 293
Wiring Diagram . . . . . . . . . . . . . . 294
Diagnostic Procedure . . . . . . . . . . ... 295
Component Inspection . . . . . . . . . . .. 297
Removal and Installation . . . . . . . . . .. 297

DTC P0300 - P0308 NO. 8 - 1 CYLINDER MISFIRE,
MULTIPLE CYLINDER MISFIRE . . . . . . . 298

On Board Diagnosis Logic . . . . . . . . . 298
DTC Confirmation Procedure . . . . . . . ... 299
Diagnostic Procedure . . . . . . . . . . ... 299

DTC P0327, P0328, P0332, P0333 KS . . . . ... 304

Component Description . . . . . . . . . . 304
On Board Diagnosis Logic . . . . . . . . . 304
DTC Confirmation Procedure . . . . . . . ... 304
Wiring Diagram . . . . . . . . . . . . . . 305
Diagnostic Procedure . . . . . . . . . . ... 306
Component Inspection . . . . . . . . . . .. 307
Removal and Installation . . . . . . . . . .. 308

DTC P0335 CKP SENSOR (POS) . . . . . . .. 309

Component Description . . . . . . . . . . 309
CONSULT-II Reference Value in Data Monitor Mode

. 309

On Board Diagnosis Logic . . . . . . . . . 309
DTC Confirmation Procedure . . . . . . . ... 309
Wiring Diagram . . . . . . . . . . . . . . 310
Diagnostic Procedure . . . . . . . . . . ... 313
Component Inspection . . . . . . . . . . .. 316
Removal and Installation . . . . . . . . . .. 316

DTC P0340 CMP SENSOR (PHASE) . . . . . . 317

Component Description . . . . . . . . . . 317
On Board Diagnosis Logic . . . . . . . . . 317
DTC Confirmation Procedure . . . . . . . ... 317
Wiring Diagram . . . . . . . . . . . . . . 318
Diagnostic Procedure . . . . . . . . . . ... 319
Component Inspection . . . . . . . . . . .. 321
Removal and Installation . . . . . . . . . .. 321

DTC P0420, P0430 THREE WAY CATALYST FUNC-
TION . . . . . . . . . . . . . . . . . . 322

On Board Diagnosis Logic . . . . . . . . . 322
DTC Confirmation Procedure . . . . . . . ... 322
Overall Function Check . . . . . . . . . . 323
Diagnostic Procedure . . . . . . . . . . ... 324

DTC P0441 EVAP CONTROL SYSTEM . . . . . 327

System Description . . . . . . . . . . . ... 327
On Board Diagnosis Logic . . . . . . . . . 327
DTC Confirmation Procedure . . . . . . . ... 327
Overall Function Check . . . . . . . . . . 328
Diagnostic Procedure . . . . . . . . . . ... 329

DTC P0442 EVAP CONTROL SYSTEM . . . . . 333

On Board Diagnosis Logic . . . . . . . . . 333
DTC Confirmation Procedure . . . . . . . ... 334
Diagnostic Procedure . . . . . . . . . . ... 335
Component Inspection . . . . . . . . . . .. 341

DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE . . . . . .. 342

Description . . . . . . . . . . . . . . . 342
CONSULT-II Reference Value in Data Monitor Mode

EC-4

. 342

On Board Diagnosis Logic . . . . . . . . . 343
DTC Confirmation Procedure . . . . . . . ... 343
Wiring Diagram . . . . . . . . . . . . . . 344
Diagnostic Procedure . . . . . . . . . . ... 345
Component Inspection . . . . . . . . . . .. 347
Removal and Installation . . . . . . . . . .. 347

DTC P0447 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . . . . 348

Component Description . . . . . . . . . . 348
CONSULT-II Reference Value in Data Monitor Mode

. 348

On Board Diagnosis Logic . . . . . . . . . 348
DTC Confirmation Procedure . . . . . . . ... 349
Wiring Diagram . . . . . . . . . . . . . . 350
Diagnostic Procedure . . . . . . . . . . ... 351
Component Inspection . . . . . . . . . . .. 353

DTC P0452 EVAP CONTROL SYSTEM PRESSURE
SENSOR . . . . . . . . . . . . . . . . .. 355

Component Description . . . . . . . . . . 355
CONSULT-II Reference Value in Data Monitor Mode

. 355

On Board Diagnosis Logic . . . . . . . . . 355
DTC Confirmation Procedure . . . . . . . ... 356
Wiring Diagram . . . . . . . . . . . . . . 357
Diagnostic Procedure . . . . . . . . . . ... 358
Component Inspection . . . . . . . . . . .. 361

DTC P0453 EVAP CONTROL SYSTEM PRESSURE
SENSOR . . . . . . . . . . . . . . . . .. 362

Component Description . . . . . . . . . . 362
CONSULT-II Reference Value in Data Monitor Mode

. 362

On Board Diagnosis Logic . . . . . . . . . 362
DTC Confirmation Procedure . . . . . . . ... 363
Wiring Diagram . . . . . . . . . . . . . . 364
Diagnostic Procedure . . . . . . . . . . ... 365
Component Inspection . . . . . . . . . . .. 369

DTC P0455 EVAP CONTROL SYSTEM . . . . . 370

On Board Diagnosis Logic . . . . . . . . . 370
DTC Confirmation Procedure . . . . . . . ... 371
Diagnostic Procedure . . . . . . . . . . ... 372

DTC P0456 EVAP CONTROL SYSTEM . . . . . 378

On Board Diagnosis Logic . . . . . . . . . 378
DTC Confirmation Procedure . . . . . . . ... 379
Overall Function Check . . . . . . . . . . 380
Diagnostic Procedure . . . . . . . . . . ... 381
Component Inspection . . . . . . . . . . .. 386

DTC P0460 FUEL LEVEL SENSOR . . . . . ... 387

Component Description . . . . . . . . . . 387
On Board Diagnosis Logic . . . . . . . . . 387
DTC Confirmation Procedure . . . . . . . ... 387
Wiring Diagram . . . . . . . . . . . . . . 388
Diagnostic Procedure . . . . . . . . . . ... 389
Removal and Installation . . . . . . . . . .. 391

DTC P0461 FUEL LEVEL SENSOR . . . . . ... 392

Component Description . . . . . . . . . . 392
On Board Diagnosis Logic . . . . . . . . . 392
Overall Function Check . . . . . . . . . . 392

DTC P0462, P0463 FUEL LEVEL SENSOR . . .. 394

Component Description . . . . . . . . . . 394
On Board Diagnosis Logic . . . . . . . . . 394
DTC Confirmation Procedure . . . . . . . . 394
Wiring Diagram . . . . . . . . . . . . . .395
Diagnostic Procedure . . . . . . . . . . . 396
Removal and Installation . . . . . . . . . ...398

DTC P0500 VSS . . . . . . . . . . . . . ..399

Description . . . . . . . . . . . . . . . 399
On Board Diagnosis Logic . . . . . . . . . 399
DTC Confirmation Procedure . . . . . . . . 399
Overall Function Check . . . . . . . . . . .400
Diagnostic Procedure . . . . . . . . . . . 400

DTC P0506 ISC SYSTEM . . . . . . . . . ...401

Description . . . . . . . . . . . . . . . 401
On Board Diagnosis Logic . . . . . . . . . 401
DTC Confirmation Procedure . . . . . . . . 401
Diagnostic Procedure . . . . . . . . . . . 402

DTC P0507 ISC SYSTEM . . . . . . . . . ...403

Description . . . . . . . . . . . . . . . 403
On Board Diagnosis Logic . . . . . . . . . 403
DTC Confirmation Procedure . . . . . . . . 403
Diagnostic Procedure . . . . . . . . . . . 404

DTC P0550 PSP SENSOR . . . . . . . . . ..405

Component Description . . . . . . . . . . 405
CONSULT-II Reference Value in Data Monitor Mode

.405

On Board Diagnosis Logic . . . . . . . . . 405
DTC Confirmation Procedure . . . . . . . . 405
Wiring Diagram . . . . . . . . . . . . . .406
Diagnostic Procedure . . . . . . . . . . . 407
Component Inspection . . . . . . . . . . ..409
Removal and Installation . . . . . . . . . ...409

DTC P0605 ECM . . . . . . . . . . . . . .410

Component Description . . . . . . . . . . 410
On Board Diagnosis Logic . . . . . . . . . 410
DTC Confirmation Procedure . . . . . . . . 410
Diagnostic Procedure . . . . . . . . . . . 411

DTC P0650 MIL . . . . . . . . . . . . . ...413

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

DTC P1065 ECM POWER SUPPLY . . . . . . 418

Component Description . . . . . . . . . . 418
On Board Diagnosis Logic . . . . . . . . . 418
DTC Confirmation Procedure . . . . . . . . 418
Wiring Diagram . . . . . . . . . . . . . .419
Diagnostic Procedure . . . . . . . . . . . 420

DTC P1102 MAF SENSOR . . . . . . . . . .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 . . . . . . . . . . ..427
Removal and Installation . . . . . . . . . ...427