Infiniti F50. Manual — part 340

EC-1

ENGINE CONTROL SYSTEM

B ENGINE

CONTENTS

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SECTION

A

EC

ENGINE CONTROL SYSTEM

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

Alphabetical Index . . . . . . . . . . . . . 9
DTC No. Index . . . . . . . . . . . . . ... 12

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 . . . . . . . .. 34

Idle Speed and Ignition Timing Check . . . . . 34
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment . . . . . . . . . . . . . . . . 35
Accelerator Pedal Released Position Learning . .. 46
Throttle Valve Closed Position Learning . . . . 46
Idle Air Volume Learning . . . . . . . . . . 46
Fuel Pressure Check . . . . . . . . . . . .. 48

ON BOARD DIAGNOSTIC (OBD) SYSTEM . . . 51

Introduction . . . . . . . . . . . . . . . 51
Two Trip Detection Logic . . . . . . . . . . 51
Emission-related Diagnostic Information . . . . 52
IVIS (Infiniti Vehicle Immobilizer System — NATS)

... 65

Malfunction Indicator Lamp (MIL) . . . . . . ... 65
OBD System Operation Chart . . . . . . . . 69

TROUBLE DIAGNOSIS . . . . . . . . . . . 74

Trouble Diagnosis Introduction . . . . . . . ... 74
DTC Inspection Priority Chart . . . . . . . . . 79
Fail-safe Chart . . . . . . . . . . . . . . 81
Basic Inspection . . . . . . . . . . . . . . 82
Symptom Matrix Chart . . . . . . . . . . . 87
Engine Control Component Parts Location . . . 91
Circuit Diagram . . . . . . . . . . . . . ... 97
ECM Harness Connector Terminal Layout . . . . 99
ECM Terminals and Reference Value . . . . . . 99
CONSULT-II Function . . . . . . . . . . ... 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 CIRCUIT FOR ECM . . . . ... 133

Wiring Diagram . . . . . . . . . . . . . . 133
Diagnostic Procedure . . . . . . . . . . ... 136
Component Inspection . . . . . . . . . . .. 140

DTC U1000, U1001 CAN COMMUNICATION LINE .141

Description . . . . . . . . . . . . . . . 141
On Board Diagnosis Logic . . . . . . . . . 141
DTC Confirmation Procedure . . . . . . . ... 141
Wiring Diagram . . . . . . . . . . . . . . 142
Diagnostic Procedure . . . . . . . . . . ... 143

DTC P0011, P0021 IVT CONTROL . . . . . . 144

Description . . . . . . . . . . . . . . . 144
CONSULT-II Reference Value in Data Monitor Mode

. 145

On Board Diagnosis Logic . . . . . . . . . 145

EC-2

DTC Confirmation Procedure . . . . . . . ... 146
Wiring Diagram . . . . . . . . . . . . . . 147
Diagnostic Procedure . . . . . . . . . . ... 151
Component Inspection . . . . . . . . . . .. 154
Removal and Installation . . . . . . . . . .. 154

DTC P0031, P0032, P0051, P0052 HO2S1 HEATER .155

Description . . . . . . . . . . . . . . . 155
CONSULT-II Reference Value in Data Monitor Mode

. 155

On Board Diagnosis Logic . . . . . . . . . 155
DTC Confirmation Procedure . . . . . . . ... 156
Wiring Diagram . . . . . . . . . . . . . . 157
Diagnostic Procedure . . . . . . . . . . ... 160
Component Inspection . . . . . . . . . . .. 162
Removal and Installation . . . . . . . . . .. 162

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .163

Description . . . . . . . . . . . . . . . 163
CONSULT-II Reference Value in Data Monitor Mode

. 163

On Board Diagnosis Logic . . . . . . . . . 163
DTC Confirmation Procedure . . . . . . . ... 164
Wiring Diagram . . . . . . . . . . . . . . 165
Diagnostic Procedure . . . . . . . . . . ... 168
Component Inspection . . . . . . . . . . .. 170
Removal and Installation . . . . . . . . . .. 170

DTC P0101 MAF SENSOR . . . . . . . . . . 171

Component Description . . . . . . . . . . 171
CONSULT-II Reference Value in Data Monitor Mode

. 171

On Board Diagnosis Logic . . . . . . . . . 171
DTC Confirmation Procedure . . . . . . . ... 172
Overall Function Check . . . . . . . . . . 173
Wiring Diagram . . . . . . . . . . . . . . 174
Diagnostic Procedure . . . . . . . . . . ... 175
Component Inspection . . . . . . . . . . .. 177
Removal and Installation . . . . . . . . . .. 178

DTC P0102, P0103 MAF SENSOR . . . . . . . 179

Component Description . . . . . . . . . . 179
CONSULT-II Reference Value in Data Monitor Mode

. 179

On Board Diagnosis Logic . . . . . . . . . 179
DTC Confirmation Procedure . . . . . . . ... 180
Wiring Diagram . . . . . . . . . . . . . . 181
Diagnostic Procedure . . . . . . . . . . ... 182
Component Inspection . . . . . . . . . . .. 184
Removal and Installation . . . . . . . . . .. 185

DTC P0112, P0113 IAT SENSOR . . . . . . ... 186

Component Description . . . . . . . . . . 186
On Board Diagnosis Logic . . . . . . . . . 186
DTC Confirmation Procedure . . . . . . . ... 186
Wiring Diagram . . . . . . . . . . . . . . 187
Diagnostic Procedure . . . . . . . . . . ... 188
Component Inspection . . . . . . . . . . .. 189
Removal and Installation . . . . . . . . . .. 189

DTC P0117, P0118 ECT SENSOR . . . . . . .. 190

Component Description . . . . . . . . . . 190
On Board Diagnosis Logic . . . . . . . . . 190
DTC Confirmation Procedure . . . . . . . ... 191
Wiring Diagram . . . . . . . . . . . . . . 192

Diagnostic Procedure . . . . . . . . . . . 193
Component Inspection . . . . . . . . . . ..194
Removal and Installation . . . . . . . . . ...194

DTC P0122, P0123 TP SENSOR . . . . . . . 195

Component Description . . . . . . . . . . 195
CONSULT-II Reference Value in Data Monitor Mode

.195

On Board Diagnosis Logic . . . . . . . . . 195
DTC Confirmation Procedure . . . . . . . . 196
Wiring Diagram . . . . . . . . . . . . . .197
Diagnostic Procedure . . . . . . . . . . . 198
Component Inspection . . . . . . . . . . ..200
Removal and Installation . . . . . . . . . ...200

DTC P0125 ECT SENSOR . . . . . . . . . ..201

Component Description . . . . . . . . . . 201
On Board Diagnosis Logic . . . . . . . . . 201
DTC Confirmation Procedure . . . . . . . . 202
Wiring Diagram . . . . . . . . . . . . . .203
Diagnostic Procedure . . . . . . . . . . . 204
Component Inspection . . . . . . . . . . ..204
Removal and Installation . . . . . . . . . ...204

DTC P0127 IAT SENSOR . . . . . . . . . . 205

Component Description . . . . . . . . . . 205
On Board Diagnosis Logic . . . . . . . . . 205
DTC Confirmation Procedure . . . . . . . . 206
Wiring Diagram . . . . . . . . . . . . . .207
Diagnostic Procedure . . . . . . . . . . . 208
Component Inspection . . . . . . . . . . ..209
Removal and Installation . . . . . . . . . ...209

DTC P0128 THERMOSTAT FUNCTION . . . . .210

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

DTC P0132, P0152 HO2S1 . . . . . . . . . .212

Component Description . . . . . . . . . . 212
CONSULT-II Reference Value in Data Monitor Mode

.212

On Board Diagnosis Logic . . . . . . . . . 212
DTC Confirmation Procedure . . . . . . . . 213
Wiring Diagram . . . . . . . . . . . . . .214
Diagnostic Procedure . . . . . . . . . . . 217
Component Inspection . . . . . . . . . . ..219
Removal and Installation . . . . . . . . . ...220

DTC P0133, P0153 HO2S1 . . . . . . . . . .221

Component Description . . . . . . . . . . 221
CONSULT-II Reference Value in Data Monitor Mode

.221

On Board Diagnosis Logic . . . . . . . . . 221
DTC Confirmation Procedure . . . . . . . . 222
Overall Function Check . . . . . . . . . . .223
Wiring Diagram . . . . . . . . . . . . . .224
Diagnostic Procedure . . . . . . . . . . . 227
Component Inspection . . . . . . . . . . ..231
Removal and Installation . . . . . . . . . ...232

DTC P0134, P0154 HO2S1 . . . . . . . . . .233

Component Description . . . . . . . . . . 233
CONSULT-II Reference Value in Data Monitor Mode

EC-3

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EC

A

. 233

On Board Diagnosis Logic . . . . . . . . ... 233
DTC Confirmation Procedure . . . . . . . ... 234
Overall Function Check . . . . . . . . . . 235
Wiring Diagram . . . . . . . . . . . . . 236
Diagnostic Procedure . . . . . . . . . . ... 239
Component Inspection . . . . . . . . . . . 240
Removal and Installation . . . . . . . . . .. 241

DTC P0138, P0158 HO2S2 . . . . . . . . . 242

Component Description . . . . . . . . . . 242
CONSULT-II Reference Value in Data Monitor Mode

. 242

On Board Diagnosis Logic . . . . . . . . ... 242
DTC Confirmation Procedure . . . . . . . ... 243
Wiring Diagram . . . . . . . . . . . . . 244
Diagnostic Procedure . . . . . . . . . . ... 247
Component Inspection . . . . . . . . . . . 250
Removal and Installation . . . . . . . . . .. 252

DTC P0139, P0159 HO2S2 . . . . . . . . . 253

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

. 253

On Board Diagnosis Logic . . . . . . . . ... 253
DTC Confirmation Procedure . . . . . . . ... 254
Overall Function Check . . . . . . . . . . 254
Wiring Diagram . . . . . . . . . . . . . 256
Diagnostic Procedure . . . . . . . . . . ... 259
Component Inspection . . . . . . . . . . . 262
Removal and Installation . . . . . . . . . .. 264

DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . . . .. 265

On Board Diagnosis Logic . . . . . . . . ... 265
DTC Confirmation Procedure . . . . . . . ... 265
Wiring Diagram . . . . . . . . . . . . . 267
Diagnostic Procedure . . . . . . . . . . ... 269

DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . . . .. 274

On Board Diagnosis Logic . . . . . . . . ... 274
DTC Confirmation Procedure . . . . . . . ... 274
Wiring Diagram . . . . . . . . . . . . . 276
Diagnostic Procedure . . . . . . . . . . ... 278

DTC P0181 FTT SENSOR . . . . . . . . . .. 282

Component Description . . . . . . . . . . 282
On Board Diagnosis Logic . . . . . . . . ... 282
DTC Confirmation Procedure . . . . . . . ... 282
Wiring Diagram . . . . . . . . . . . . . 284
Diagnostic Procedure . . . . . . . . . . ... 285
Component Inspection . . . . . . . . . . . 286
Removal and Installation . . . . . . . . . .. 286

DTC P0182, P0183 FTT SENSOR . . . . . . . 287

Component Description . . . . . . . . . . 287
On Board Diagnosis Logic . . . . . . . . ... 287
DTC Confirmation Procedure . . . . . . . ... 287
Wiring Diagram . . . . . . . . . . . . . 288
Diagnostic Procedure . . . . . . . . . . ... 289
Component Inspection . . . . . . . . . . . 290
Removal and Installation . . . . . . . . . .. 290

DTC P0222, P0223 TP SENSOR . . . . . . ... 291

Component Description . . . . . . . . . . 291

CONSULT-II Reference Value in Data Monitor Mode

. 291

On Board Diagnosis Logic . . . . . . . . . 291
DTC Confirmation Procedure . . . . . . . ... 291
Wiring Diagram . . . . . . . . . . . . . . 293
Diagnostic Procedure . . . . . . . . . . ... 294
Component Inspection . . . . . . . . . . .. 296
Removal and Installation . . . . . . . . . .. 296

DTC P0300 - P0308 NO. 8 - 1 CYLINDER MISFIRE,
MULTIPLE CYLINDER MISFIRE . . . . . . . 297

On Board Diagnosis Logic . . . . . . . . . 297
DTC Confirmation Procedure . . . . . . . ... 298
Diagnostic Procedure . . . . . . . . . . ... 298

DTC P0327, P0328, P0332, P0333 KS . . . . ... 303

Component Description . . . . . . . . . . 303
On Board Diagnosis Logic . . . . . . . . . 303
DTC Confirmation Procedure . . . . . . . ... 303
Wiring Diagram . . . . . . . . . . . . . . 304
Diagnostic Procedure . . . . . . . . . . ... 305
Component Inspection . . . . . . . . . . .. 306
Removal and Installation . . . . . . . . . .. 306

DTC P0335 CKP SENSOR (POS) . . . . . . .. 307

Component Description . . . . . . . . . . 307
CONSULT-II Reference Value in Data Monitor Mode

. 307

On Board Diagnosis Logic . . . . . . . . . 307
DTC Confirmation Procedure . . . . . . . ... 307
Wiring Diagram . . . . . . . . . . . . . . 308
Diagnostic Procedure . . . . . . . . . . ... 311
Component Inspection . . . . . . . . . . .. 314
Removal and Installation . . . . . . . . . .. 314

DTC P0340 CMP SENSOR (PHASE) . . . . . . 315

Component Description . . . . . . . . . . 315
On Board Diagnosis Logic . . . . . . . . . 315
DTC Confirmation Procedure . . . . . . . ... 315
Wiring Diagram . . . . . . . . . . . . . . 316
Diagnostic Procedure . . . . . . . . . . ... 317
Component Inspection . . . . . . . . . . .. 319
Removal and Installation . . . . . . . . . .. 319

DTC P0420, P0430 THREE WAY CATALYST FUNC-
TION . . . . . . . . . . . . . . . . . . 320

On Board Diagnosis Logic . . . . . . . . . 320
DTC Confirmation Procedure . . . . . . . ... 320
Overall Function Check . . . . . . . . . . 321
Diagnostic Procedure . . . . . . . . . . ... 322

DTC P0441 EVAP CONTROL SYSTEM . . . . . 325

System Description . . . . . . . . . . . ... 325
On Board Diagnosis Logic . . . . . . . . . 325
DTC Confirmation Procedure . . . . . . . ... 325
Overall Function Check . . . . . . . . . . 326
Diagnostic Procedure . . . . . . . . . . ... 327

DTC P0442 EVAP CONTROL SYSTEM . . . . . 330

On Board Diagnosis Logic . . . . . . . . . 330
DTC Confirmation Procedure . . . . . . . ... 331
Diagnostic Procedure . . . . . . . . . . ... 332
Component Inspection . . . . . . . . . . .. 338

DTC P0444, P0445 EVAP CANISTER PURGE VOL-
UME CONTROL SOLENOID VALVE . . . . . .. 339

Description . . . . . . . . . . . . . . . 339

EC-4

CONSULT-II Reference Value in Data Monitor Mode

. 339

On Board Diagnosis Logic . . . . . . . . . 340
DTC Confirmation Procedure . . . . . . . ... 340
Wiring Diagram . . . . . . . . . . . . . . 341
Diagnostic Procedure . . . . . . . . . . ... 342
Component Inspection . . . . . . . . . . .. 344
Removal and Installation . . . . . . . . . .. 344

DTC P0447 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . . . . 345

Component Description . . . . . . . . . . 345
CONSULT-II Reference Value in Data Monitor Mode

. 345

On Board Diagnosis Logic . . . . . . . . . 345
DTC Confirmation Procedure . . . . . . . ... 346
Wiring Diagram . . . . . . . . . . . . . . 347
Diagnostic Procedure . . . . . . . . . . ... 348
Component Inspection . . . . . . . . . . .. 350

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 . . . . . . . . . . . . . . . . .. 359

Component Description . . . . . . . . . . 359
CONSULT-II Reference Value in Data Monitor Mode

. 359

On Board Diagnosis Logic . . . . . . . . . 359
DTC Confirmation Procedure . . . . . . . ... 360
Wiring Diagram . . . . . . . . . . . . . . 361
Diagnostic Procedure . . . . . . . . . . ... 362
Component Inspection . . . . . . . . . . .. 365

DTC P0455 EVAP CONTROL SYSTEM . . . . . 367

On Board Diagnosis Logic . . . . . . . . . 367
DTC Confirmation Procedure . . . . . . . ... 368
Diagnostic Procedure . . . . . . . . . . ... 369

DTC P0456 EVAP CONTROL SYSTEM . . . . . 375

On Board Diagnosis Logic . . . . . . . . . 375
DTC Confirmation Procedure . . . . . . . ... 376
Overall Function Check . . . . . . . . . . 377
Diagnostic Procedure . . . . . . . . . . ... 378
Component Inspection . . . . . . . . . . .. 383

DTC P0460 FUEL LEVEL SENSOR . . . . . ... 384

Component Description . . . . . . . . . . 384
On Board Diagnosis Logic . . . . . . . . . 384
DTC Confirmation Procedure . . . . . . . ... 384
Wiring Diagram . . . . . . . . . . . . . . 385
Diagnostic Procedure . . . . . . . . . . ... 386
Removal and Installation . . . . . . . . . .. 388

DTC P0461 FUEL LEVEL SENSOR . . . . . ... 389

Component Description . . . . . . . . . . 389
On Board Diagnosis Logic . . . . . . . . . 389
Overall Function Check . . . . . . . . . . 389

DTC P0462, P0463 FUEL LEVEL SENSOR . . ...391

Component Description . . . . . . . . . . 391
On Board Diagnosis Logic . . . . . . . . . 391
DTC Confirmation Procedure . . . . . . . . 391
Wiring Diagram . . . . . . . . . . . . . .392
Diagnostic Procedure . . . . . . . . . . . 393
Removal and Installation . . . . . . . . . ...394

DTC P0500 VSS . . . . . . . . . . . . . ..395

Description . . . . . . . . . . . . . . . 395
On Board Diagnosis Logic . . . . . . . . . 395
DTC Confirmation Procedure . . . . . . . . 395
Overall Function Check . . . . . . . . . . .396
Diagnostic Procedure . . . . . . . . . . . 396

DTC P0506 ISC SYSTEM . . . . . . . . . ...397

Description . . . . . . . . . . . . . . . 397
On Board Diagnosis Logic . . . . . . . . . 397
DTC Confirmation Procedure . . . . . . . . 397
Diagnostic Procedure . . . . . . . . . . . 398

DTC P0507 ISC SYSTEM . . . . . . . . . ...399

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

DTC P0550 PSP SENSOR . . . . . . . . . ..401

Component Description . . . . . . . . . . 401
CONSULT-II Reference Value in Data Monitor Mode

.401

On Board Diagnosis Logic . . . . . . . . . 401
DTC Confirmation Procedure . . . . . . . . 401
Wiring Diagram . . . . . . . . . . . . . .402
Diagnostic Procedure . . . . . . . . . . . 403
Component Inspection . . . . . . . . . . ..406

DTC P0605 ECM . . . . . . . . . . . . . .407

Component Description . . . . . . . . . . 407
On Board Diagnosis Logic . . . . . . . . . 407
DTC Confirmation Procedure . . . . . . . . 407
Diagnostic Procedure . . . . . . . . . . . 408

DTC P0650 MIL . . . . . . . . . . . . . ...410

Component Description . . . . . . . . . . 410
On Board Diagnosis Logic . . . . . . . . . 410
DTC Confirmation Procedure . . . . . . . . 410
Wiring Diagram . . . . . . . . . . . . . . 411
Diagnostic Procedure . . . . . . . . . . . 412

DTC P1065 ECM POWER SUPPLY . . . . . . 414

Component Description . . . . . . . . . . 414
On Board Diagnosis Logic . . . . . . . . . 414
DTC Confirmation Procedure . . . . . . . . 414
Wiring Diagram . . . . . . . . . . . . . .415
Diagnostic Procedure . . . . . . . . . . . 416

DTC P1102 MAF SENSOR . . . . . . . . . .418

Component Description . . . . . . . . . . 418
CONSULT-II Reference Value in Data Monitor Mode

.418

On Board Diagnosis Logic . . . . . . . . . 418
DTC Confirmation Procedure . . . . . . . . 419
Wiring Diagram . . . . . . . . . . . . . .420
Diagnostic Procedure . . . . . . . . . . . 421
Component Inspection . . . . . . . . . . ..423
Removal and Installation . . . . . . . . . ...423