Infiniti G37 Coupe. Manual — part 455

EC-1

ENGINE

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SECTION

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CONTENTS

ENGINE CONTROL SYSTEM

VQ37VHR

BASIC INSPECTION . . . . . . . . .

9

DIAGNOSIS AND REPAIR WORKFLOW . . ..

9

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

9

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

12

INSPECTION AND ADJUSTMENT . . . . .

13

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

13

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

13

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (ECM) . . . . . . . . . . . .

16

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (ECM) : Description . . . . . .

16

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (ECM) : Special Repair Require-
ment . . . . . . . . . . . . . . . . . .

16

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (VVEL CONTROL MODULE) . .

17

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (VVEL CONTROL MODULE) :
Description . . . . . . . . . . . . . . . ..

17

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (VVEL CONTROL MODULE) :
Special Repair Requirement . . . . . . . . ...

17

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

17

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

17

IDLE SPEED : Special Repair Requirement . . ...

17

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

17

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

17

IGNITION TIMING : Special Repair Requirement

.

17

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

18

VIN REGISTRATION : Description . . . . . . .

18

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

18

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

18

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

18

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

18

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

18

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

18

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

18

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

19

IDLE AIR VOLUME LEARNING : Description . . .

19

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

19

VVEL CONTROL SHAFT POSITION SENSOR AD-
JUSTMENT . . . . . . . . . . . . . . . .

20

VVEL CONTROL SHAFT POSITION SENSOR
ADJUSTMENT : Description . . . . . . . . ...

21

VVEL CONTROL SHAFT POSITION SENSOR
ADJUSTMENT : Special Repair Requirement . .

21

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

22

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

22

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

22

FUNCTION DIAGNOSIS . . . . . . . ..

24

ENGINE CONTROL SYSTEM . . . . . . ..

24

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

24

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

25

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

25

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

32

MULTIPORT FUEL INJECTION SYSTEM . ...

34

EC-2

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

34

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

34

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

37

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

43

ELECTRIC IGNITION SYSTEM . . . . . . .

45

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

45

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

45

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

46

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

52

AIR CONDITIONING CUT CONTROL . . . ..

54

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

54

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

54

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

55

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

61

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

62

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

62

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

62

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

64

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

70

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

71

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

71

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

72

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

72

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

72

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

73

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

79

EVAPORATIVE EMISSION SYSTEM . . . ...

80

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

80

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

81

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

83

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

89

INTAKE VALVE TIMING CONTROL . . . . .

91

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

91

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

91

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

92

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

98

VVEL SYSTEM . . . . . . . . . . . . ..

99

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

99

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

99

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

100

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

106

ON BOARD DIAGNOSTIC (OBD) SYSTEM ...

107

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

107

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

120

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

129

COMPONENT DIAGNOSIS . . . . . ...

132

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

132

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

132

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

132

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

133

POWER SUPPLY AND GROUND CIRCUIT .

140

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

140

U0113, U1003 CAN COMM CIRCUIT . . . ..

144

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

144

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

144

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

144

U1000, U1001 CAN COMM CIRCUIT . . . ..

146

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

146

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

146

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

146

U1010 CONTROL UNIT (CAN) . . . . . .

147

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

147

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

147

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

147

U1011 CONTROL UNIT (CAN) . . . . . .

148

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

148

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

148

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

148

U1024 CAN COMM CIRCUIT . . . . . . ...

149

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

149

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

149

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

149

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

151

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

151

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

152

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

153

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

155

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

155

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

155

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

156

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

157

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

158

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

158

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

158

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

159

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

160

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

162

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

162

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

162

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

162

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

163

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

165

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

165

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

165

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

167

EC-3

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

167

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

169

P0102, P0103, P010C, P010D MAF SENSOR

..

172

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

172

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

172

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

173

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

174

P010A MANIFOLD ABSOLUTE PRESSURE
SENSOR . . . . . . . . . . . . . . ...

177

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

177

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

177

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

177

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

178

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

181

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

181

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

181

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

182

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

182

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

184

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

184

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

184

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

185

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

186

P0122, P0123, P0227, P0228 TP SENSOR . .

187

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

187

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

187

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

188

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

189

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

189

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

190

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

190

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

190

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

191

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

191

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

193

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

193

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

193

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

194

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

194

P0128 THERMOSTAT FUNCTION . . . . ..

195

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

195

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

195

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

196

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

197

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

197

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

197

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

199

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

199

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

201

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

201

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

201

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

202

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

204

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

204

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

204

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

205

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

207

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

207

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

207

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

209

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

212

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

212

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

212

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

213

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

214

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

215

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

218

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

218

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

218

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

220

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

221

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

223

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

226

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

226

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

226

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

227

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

228

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

229

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

232

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

232

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

233

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

236

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

236

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

237

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

240

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

240

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

240

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

241

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

242

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

243

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

243

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

243

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

243

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

245

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

246

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

246

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

246

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

247

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

248

EC-4

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

249

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

249

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

249

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

250

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

250

P0222, P0223, P2132, P2133 TP SENSOR .

252

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

252

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

252

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

253

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

254

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

254

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

255

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

255

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

256

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

261

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

261

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

261

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

261

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

262

P0335 CKP SENSOR (POS) . . . . . . ...

264

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

264

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

264

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

265

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

267

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

268

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

268

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

268

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

269

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

271

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

272

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

272

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

273

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

274

P0441 EVAP CONTROL SYSTEM . . . . ..

277

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

277

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

278

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

279

P0442 EVAP CONTROL SYSTEM . . . . ..

282

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

282

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

283

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

287

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

288

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

288

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

288

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

289

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

291

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

293

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

293

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

293

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

293

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

295

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

296

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

296

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

296

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

296

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

298

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

300

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

300

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

300

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

301

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

302

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

304

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

304

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

304

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

304

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

306

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

307

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

307

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

307

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

308

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

310

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

312

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

312

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

312

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

313

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

316

P0455 EVAP CONTROL SYSTEM . . . . ..

318

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

318

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

320

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

322

P0456 EVAP CONTROL SYSTEM . . . . ..

324

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

324

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

326

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

326

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

330

P0460 FUEL LEVEL SENSOR . . . . . . .

331

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

331

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

331

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

331

P0461 FUEL LEVEL SENSOR . . . . . . .

333

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

333

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

333

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

333

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

334

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