Infiniti FX35, FX50 (S51). Manual — part 615

EC-1

ENGINE

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SECTION

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CONTENTS

ENGINE CONTROL SYSTEM

VQ35HR

BASIC INSPECTION . . . . . . . . ...

16

DIAGNOSIS AND REPAIR WORKFLOW . . .

16

Work Flow . . . . . . . . . . . . . . . ...

16

Diagnostic Work Sheet . . . . . . . . . . .

19

INSPECTION AND ADJUSTMENT . . . . .

20

BASIC INSPECTION . . . . . . . . . . . . .

20

BASIC INSPECTION : Special Repair Require-
ment . . . . . . . . . . . . . . . . . .

20

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT . . . . . . . . . . . . . .

23

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description . . . . . . . .

23

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement . .

23

IDLE SPEED . . . . . . . . . . . . . . . ..

23

IDLE SPEED : Description . . . . . . . . . ..

24

IDLE SPEED : Special Repair Requirement . . ...

24

IGNITION TIMING . . . . . . . . . . . . . ..

24

IGNITION TIMING : Description . . . . . . . ..

24

IGNITION TIMING : Special Repair Requirement

.

24

VIN REGISTRATION . . . . . . . . . . . . .

24

VIN REGISTRATION : Description . . . . . . .

24

VIN REGISTRATION : Special Repair Require-
ment . . . . . . . . . . . . . . . . . .

24

ACCELERATOR PEDAL RELEASED POSITION
LEARNING . . . . . . . . . . . . . . . .

25

ACCELERATOR PEDAL RELEASED POSITION
LEARNING : Description . . . . . . . . . . .

25

ACCELERATOR PEDAL RELEASED POSITION
LEARNING : Special Repair Requirement . . . ..

25

THROTTLE VALVE CLOSED POSITION LEARN-
ING . . . . . . . . . . . . . . . . . . . .

25

THROTTLE VALVE CLOSED POSITION
LEARNING : Description . . . . . . . . . . .

25

THROTTLE VALVE CLOSED POSITION
LEARNING : Special Repair Requirement . . . ..

25

IDLE AIR VOLUME LEARNING . . . . . . . .

25

IDLE AIR VOLUME LEARNING : Description . . .

25

IDLE AIR VOLUME LEARNING : Special Repair
Requirement . . . . . . . . . . . . . . .

25

EXHAUST VALVE TIMING CONTROL LEARNING

.

27

EXHAUST VALVE TIMING CONTROL LEARN-
ING : Description . . . . . . . . . . . . . .

27

EXHAUST VALVE TIMING CONTROL LEARN-
ING : Special Repair Requirement . . . . . . ..

27

MIXTURE RATIO SELF-LEARNING VALUE
CLEAR . . . . . . . . . . . . . . . . . ...

28

MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Description . . . . . . . . . . . .

28

MIXTURE RATIO SELF-LEARNING VALUE
CLEAR : Special Repair Requirement . . . . . .

28

SYSTEM DESCRIPTION . . . . . . . .

29

ENGINE CONTROL SYSTEM . . . . . . ..

29

System Diagram . . . . . . . . . . . . . .

29

System Description . . . . . . . . . . . . ..

30

Component Parts Location . . . . . . . . . ..

31

Component Description . . . . . . . . . . ...

37

MULTIPORT FUEL INJECTION SYSTEM . ...

39

System Diagram . . . . . . . . . . . . . .

39

System Description . . . . . . . . . . . . ..

39

Component Parts Location . . . . . . . . . ..

42

Component Description . . . . . . . . . . ...

48

ELECTRIC IGNITION SYSTEM . . . . . .

50

System Diagram . . . . . . . . . . . . . .

50

System Description . . . . . . . . . . . . ..

50

Component Parts Location . . . . . . . . . ..

51

EC-2

Component Description . . . . . . . . . . ..

57

AIR CONDITIONING CUT CONTROL . . . ..

58

System Diagram . . . . . . . . . . . . . .

58

System Description . . . . . . . . . . . . .

58

Component Parts Location . . . . . . . . . .

59

Component Description . . . . . . . . . . ..

65

AUTOMATIC SPEED CONTROL DEVICE
(ASCD) . . . . . . . . . . . . . . . ...

66

System Diagram . . . . . . . . . . . . . .

66

System Description . . . . . . . . . . . . .

66

Component Parts Location . . . . . . . . . .

68

Component Description . . . . . . . . . . .

74

CAN COMMUNICATION . . . . . . . . ...

75

System Description . . . . . . . . . . . . .

75

COOLING FAN CONTROL . . . . . . . ...

76

System Diagram . . . . . . . . . . . . . .

76

System Description . . . . . . . . . . . . .

76

Component Parts Location . . . . . . . . . .

77

Component Description . . . . . . . . . . ..

83

EVAPORATIVE EMISSION SYSTEM . . . ...

84

System Diagram . . . . . . . . . . . . . .

84

System Description . . . . . . . . . . . . .

84

Component Parts Location . . . . . . . . . .

87

Component Description . . . . . . . . . . .

93

EXHAUST VALVE TIMING CONTROL . . . .

95

System Diagram . . . . . . . . . . . . . .

95

System Description . . . . . . . . . . . . .

95

Component Parts Location . . . . . . . . . .

96

Component Description . . . . . . . . . . .

102

INTAKE VALVE TIMING CONTROL . . . ...

103

System Diagram . . . . . . . . . . . . .

103

System Description . . . . . . . . . . . .

103

Component Parts Location . . . . . . . . .

104

Component Description . . . . . . . . . . .

110

ON BOARD DIAGNOSTIC (OBD) SYSTEM ...

111

Diagnosis Description . . . . . . . . . . .

111

CONSULT-III Function . . . . . . . . . . ..

124

Diagnosis Tool Function . . . . . . . . . ..

132

DTC/CIRCUIT DIAGNOSIS . . . . . .

134

TROUBLE DIAGNOSIS - SPECIFICATION
VALUE . . . . . . . . . . . . . . . .

134

Description . . . . . . . . . . . . . . . .

134

Component Function Check . . . . . . . . ..

134

Diagnosis Procedure . . . . . . . . . . . .

135

POWER SUPPLY AND GROUND CIRCUIT ...

142

Diagnosis Procedure . . . . . . . . . . . .

142

U0101 CAN COMM CIRCUIT . . . . . . ..

145

Description . . . . . . . . . . . . . . . .

145

DTC Logic . . . . . . . . . . . . . . . ..

145

Diagnosis Procedure . . . . . . . . . . . .

145

U0164 CAN COMM CIRCUIT . . . . . . ...

146

Description . . . . . . . . . . . . . . .

146

DTC Logic . . . . . . . . . . . . . . . .

146

Diagnosis Procedure . . . . . . . . . . . .

146

U1001 CAN COMM CIRCUIT . . . . . . ...

147

Description . . . . . . . . . . . . . . .

147

DTC Logic . . . . . . . . . . . . . . . .

147

Diagnosis Procedure . . . . . . . . . . . .

147

P0011, P0021 IVT CONTROL . . . . . . ..

148

DTC Logic . . . . . . . . . . . . . . . .

148

Diagnosis Procedure . . . . . . . . . . . .

149

Component Inspection . . . . . . . . . . ..

150

P0014, P0024 EVT CONTROL . . . . . . .

152

DTC Logic . . . . . . . . . . . . . . . .

152

Diagnosis Procedure . . . . . . . . . . . .

153

Component Inspection . . . . . . . . . . ..

154

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

156

Description . . . . . . . . . . . . . . .

156

DTC Logic . . . . . . . . . . . . . . . .

156

Diagnosis Procedure . . . . . . . . . . . .

157

Component Inspection . . . . . . . . . . ..

158

P0037, P0038, P0057, P0058 HO2S2 HEAT-
ER . . . . . . . . . . . . . . . . . .

159

Description . . . . . . . . . . . . . . .

159

DTC Logic . . . . . . . . . . . . . . . .

159

Diagnosis Procedure . . . . . . . . . . . .

160

Component Inspection . . . . . . . . . . ..

161

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

162

Description . . . . . . . . . . . . . . .

162

DTC Logic . . . . . . . . . . . . . . . .

162

Diagnosis Procedure . . . . . . . . . . . .

162

Component Inspection . . . . . . . . . . ..

163

P0078, P0084 EVT CONTROL MAGNET RE-
TARDER . . . . . . . . . . . . . . ...

165

Description . . . . . . . . . . . . . . .

165

DTC Logic . . . . . . . . . . . . . . . .

165

Diagnosis Procedure . . . . . . . . . . . .

165

Component Inspection . . . . . . . . . . ..

166

P0101, P010B MAF SENSOR . . . . . . ..

168

Description . . . . . . . . . . . . . . .

168

DTC Logic . . . . . . . . . . . . . . . .

168

Component Function Check . . . . . . . . .

170

Diagnosis Procedure . . . . . . . . . . . .

170

Component Inspection . . . . . . . . . . ..

172

P0102, P0103, P010C, P010D MAF SENSOR ..

175

Description . . . . . . . . . . . . . . .

175

DTC Logic . . . . . . . . . . . . . . . .

175

Diagnosis Procedure . . . . . . . . . . . .

176

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Component Inspection . . . . . . . . . . ..

177

P0112, P0113 IAT SENSOR . . . . . . .

181

Description . . . . . . . . . . . . . . .

181

DTC Logic . . . . . . . . . . . . . . . .

181

Diagnosis Procedure . . . . . . . . . . . .

182

Component Inspection . . . . . . . . . . ..

182

P0116 ECT SENSOR . . . . . . . . . ...

184

Description . . . . . . . . . . . . . . .

184

DTC Logic . . . . . . . . . . . . . . . .

184

Diagnosis Procedure . . . . . . . . . . . .

185

Component Inspection . . . . . . . . . . ..

185

P0117, P0118 ECT SENSOR . . . . . . ...

186

Description . . . . . . . . . . . . . . .

186

DTC Logic . . . . . . . . . . . . . . . .

186

Diagnosis Procedure . . . . . . . . . . . .

187

Component Inspection . . . . . . . . . . ..

188

P0122, P0123, P0227, P0228 TP SENSOR . .

189

Description . . . . . . . . . . . . . . .

189

DTC Logic . . . . . . . . . . . . . . . .

189

Diagnosis Procedure . . . . . . . . . . . .

190

Component Inspection . . . . . . . . . . ..

191

Special Repair Requirement . . . . . . . . .

191

P0125 ECT SENSOR . . . . . . . . . ...

193

Description . . . . . . . . . . . . . . .

193

DTC Logic . . . . . . . . . . . . . . . .

193

Diagnosis Procedure . . . . . . . . . . . .

194

Component Inspection . . . . . . . . . . ..

194

P0127 IAT SENSOR . . . . . . . . . . .

196

Description . . . . . . . . . . . . . . .

196

DTC Logic . . . . . . . . . . . . . . . .

196

Diagnosis Procedure . . . . . . . . . . . .

197

Component Inspection . . . . . . . . . . ..

197

P0128 THERMOSTAT FUNCTION . . . . ..

198

DTC Logic . . . . . . . . . . . . . . . .

198

Diagnosis Procedure . . . . . . . . . . . .

199

Component Inspection . . . . . . . . . . ..

199

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

200

Description . . . . . . . . . . . . . . .

200

DTC Logic . . . . . . . . . . . . . . . .

200

Component Function Check . . . . . . . . ..

202

Diagnosis Procedure . . . . . . . . . . . .

202

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

204

Description . . . . . . . . . . . . . . .

204

DTC Logic . . . . . . . . . . . . . . . .

204

Diagnosis Procedure . . . . . . . . . . . .

205

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

207

Description . . . . . . . . . . . . . . .

207

DTC Logic . . . . . . . . . . . . . . . .

207

Diagnosis Procedure . . . . . . . . . . . .

208

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

210

Description . . . . . . . . . . . . . . . .

210

DTC Logic . . . . . . . . . . . . . . . ..

210

Diagnosis Procedure . . . . . . . . . . . .

212

P0137, P0157 HO2S2 . . . . . . . . . .

215

Description . . . . . . . . . . . . . . . .

215

DTC Logic . . . . . . . . . . . . . . . ..

215

Component Function Check . . . . . . . . ..

216

Diagnosis Procedure . . . . . . . . . . . .

217

Component Inspection . . . . . . . . . . ...

218

P0138, P0158 HO2S2 . . . . . . . . . .

221

Description . . . . . . . . . . . . . . . .

221

DTC Logic . . . . . . . . . . . . . . . ..

221

Component Function Check . . . . . . . . ..

223

Diagnosis Procedure . . . . . . . . . . . .

224

Component Inspection . . . . . . . . . . ...

226

P0139, P0159 HO2S2 . . . . . . . . . .

229

Description . . . . . . . . . . . . . . . .

229

DTC Logic . . . . . . . . . . . . . . . ..

229

Component Function Check . . . . . . . . ..

230

Diagnosis Procedure . . . . . . . . . . . .

231

Component Inspection . . . . . . . . . . ...

232

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

235

DTC Logic . . . . . . . . . . . . . . . ..

235

Diagnosis Procedure . . . . . . . . . . . .

236

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

239

DTC Logic . . . . . . . . . . . . . . . ..

239

Diagnosis Procedure . . . . . . . . . . . .

240

P0181 FTT SENSOR . . . . . . . . . ...

243

Description . . . . . . . . . . . . . . . .

243

DTC Logic . . . . . . . . . . . . . . . ..

243

Diagnosis Procedure . . . . . . . . . . . .

244

Component Inspection . . . . . . . . . . ...

245

P0182, P0183 FTT SENSOR . . . . . . ..

246

Description . . . . . . . . . . . . . . . .

246

DTC Logic . . . . . . . . . . . . . . . ..

246

Diagnosis Procedure . . . . . . . . . . . .

246

Component Inspection . . . . . . . . . . ...

248

P0196 EOT SENSOR . . . . . . . . . ..

249

Description . . . . . . . . . . . . . . . .

249

DTC Logic . . . . . . . . . . . . . . . ..

249

Diagnosis Procedure . . . . . . . . . . . .

250

Component Inspection . . . . . . . . . . ...

251

P0197, P0198 EOT SENSOR . . . . . . .

252

Description . . . . . . . . . . . . . . . .

252

DTC Logic . . . . . . . . . . . . . . . ..

252

Diagnosis Procedure . . . . . . . . . . . .

253

Component Inspection . . . . . . . . . . ...

253

P0222, P0223, P2132, P2133 TP SENSOR ...

255

Description . . . . . . . . . . . . . . . .

255

DTC Logic . . . . . . . . . . . . . . . ..

255

Diagnosis Procedure . . . . . . . . . . . .

256

Component Inspection . . . . . . . . . . ...

257

Special Repair Requirement . . . . . . . . ..

257

P0300, P0301, P0302, P0303, P0304, P0305,
P0306 MISFIRE . . . . . . . . . . . ...

259

DTC Logic . . . . . . . . . . . . . . . ..

259

Diagnosis Procedure . . . . . . . . . . . .

260

P0327, P0328, P0332, P0333 KS . . . . .

265

Description . . . . . . . . . . . . . . . .

265

DTC Logic . . . . . . . . . . . . . . . ..

265

Diagnosis Procedure . . . . . . . . . . . .

265

Component Inspection . . . . . . . . . . ...

266

P0335 CKP SENSOR . . . . . . . . . ..

268

Description . . . . . . . . . . . . . . . .

268

DTC Logic . . . . . . . . . . . . . . . ..

268

Diagnosis Procedure . . . . . . . . . . . .

269

Component Inspection . . . . . . . . . . ...

271

P0340, P0345 CMP SENSOR . . . . . . .

273

Description . . . . . . . . . . . . . . . .

273

DTC Logic . . . . . . . . . . . . . . . ..

273

Diagnosis Procedure . . . . . . . . . . . .

275

Component Inspection . . . . . . . . . . ...

277

P0420, P0430 THREE WAY CATALYST
FUNCTION . . . . . . . . . . . . . ...

279

DTC Logic . . . . . . . . . . . . . . . ..

279

Component Function Check . . . . . . . . ..

280

Diagnosis Procedure . . . . . . . . . . . .

281

P0441 EVAP CONTROL SYSTEM . . . . ..

284

DTC Logic . . . . . . . . . . . . . . . ..

284

Component Function Check . . . . . . . . ..

285

Diagnosis Procedure . . . . . . . . . . . .

286

P0442 EVAP CONTROL SYSTEM . . . . ..

289

DTC Logic . . . . . . . . . . . . . . . ..

289

Diagnosis Procedure . . . . . . . . . . . .

290

Component Inspection . . . . . . . . . . ...

294

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

295

Description . . . . . . . . . . . . . . . .

295

DTC Logic . . . . . . . . . . . . . . . ..

295

Diagnosis Procedure . . . . . . . . . . . .

296

Component Inspection . . . . . . . . . . ...

299

P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE . ..

300

Description . . . . . . . . . . . . . . . .

300

DTC Logic . . . . . . . . . . . . . . . ..

300

Diagnosis Procedure . . . . . . . . . . . .

300

Component Inspection . . . . . . . . . . ...

302

P0447 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . .

303

Description . . . . . . . . . . . . . . . .

303

DTC Logic . . . . . . . . . . . . . . . .

303

Diagnosis Procedure . . . . . . . . . . . .

303

Component Inspection . . . . . . . . . . ..

305

P0448 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . ..

307

Description . . . . . . . . . . . . . . .

307

DTC Logic . . . . . . . . . . . . . . . .

307

Diagnosis Procedure . . . . . . . . . . . .

308

Component Inspection . . . . . . . . . . ..

309

P0451 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . .

311

Description . . . . . . . . . . . . . . .

311

DTC Logic . . . . . . . . . . . . . . . .

311

Diagnosis Procedure . . . . . . . . . . . .

312

Component Inspection . . . . . . . . . . ..

313

P0452 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . .

315

Description . . . . . . . . . . . . . . .

315

DTC Logic . . . . . . . . . . . . . . . .

315

Diagnosis Procedure . . . . . . . . . . . .

316

Component Inspection . . . . . . . . . . ..

319

P0453 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . .

320

Description . . . . . . . . . . . . . . .

320

DTC Logic . . . . . . . . . . . . . . . .

320

Diagnosis Procedure . . . . . . . . . . . .

321

Component Inspection . . . . . . . . . . ..

324

P0455 EVAP CONTROL SYSTEM . . . . ..

326

DTC Logic . . . . . . . . . . . . . . . .

326

Diagnosis Procedure . . . . . . . . . . . .

328

Component Inspection . . . . . . . . . . ..

330

P0456 EVAP CONTROL SYSTEM . . . . ..

332

DTC Logic . . . . . . . . . . . . . . . .

332

Component Function Check . . . . . . . . .

334

Diagnosis Procedure . . . . . . . . . . . .

334

Component Inspection . . . . . . . . . . ..

338

P0460 FUEL LEVEL SENSOR . . . . . . .

339

Description . . . . . . . . . . . . . . .

339

DTC Logic . . . . . . . . . . . . . . . .

339

Diagnosis Procedure . . . . . . . . . . . .

339

P0461 FUEL LEVEL SENSOR . . . . . . .

341

Description . . . . . . . . . . . . . . .

341

DTC Logic . . . . . . . . . . . . . . . .

341

Component Function Check . . . . . . . . .

341

Diagnosis Procedure . . . . . . . . . . . .

342

P0462, P0463 FUEL LEVEL SENSOR . . .

343

Description . . . . . . . . . . . . . . .

343

DTC Logic . . . . . . . . . . . . . . . .

343

Diagnosis Procedure . . . . . . . . . . . .

343

P0500 VSS . . . . . . . . . . . . . .

345

Description . . . . . . . . . . . . . . .

345

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