Nissan Murano Z51. Manual — part 837

HAC-3

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HAC

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General Precautions . . . . . . . . . . . .

125

FLUORESCENT LEAK DETECTOR . . . ...

126

General Precautions . . . . . . . . . . . .

126

WITH 7 INCH DISPLAY

BASIC INSPECTION . . . . . . . . .

127

DIAGNOSIS AND REPAIR WORKFLOW . ...

127

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

127

INSPECTION AND ADJUSTMENT . . . . ..

129

Description & Inspection . . . . . . . . . ...

129

Temperature Setting Trimmer . . . . . . . ...

131

Foot Position Setting Trimmer . . . . . . . ...

131

Inlet Port Memory Function (FRE) . . . . . .

132

Inlet Port Memory Function (REC) . . . . . .

132

SYSTEM DESCRIPTION . . . . . . ...

133

COMPRESSOR CONTROL FUNCTION . . ..

133

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

133

Fail-Safe . . . . . . . . . . . . . . . .

134

Component Part Location . . . . . . . . . .

134

Component’s Role . . . . . . . . . . . . .

137

AUTOMATIC AIR CONDITIONER SYSTEM ...

138

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

138

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

138

Component Part Location . . . . . . . . . .

145

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

148

MODE DOOR CONTROL SYSTEM . . . . .

149

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

149

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

149

UPPER VENTILATOR DOOR CONTROL
SYSTEM . . . . . . . . . . . . . . ...

151

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

151

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

151

AIR MIX DOOR CONTROL SYSTEM . . . ..

153

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

153

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

153

INTAKE DOOR CONTROL SYSTEM . . . ..

155

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

155

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

155

BLOWER MOTOR CONTROL SYSTEM . . .

157

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

157

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

157

MAGNET CLUTCH CONTROL SYSTEM . .

159

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

159

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

159

CAN COMMUNICATION SYSTEM . . . . ..

160

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

160

DIAGNOSIS SYSTEM (HVAC) . . . . . .

161

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

161

DTC/CIRCUIT DIAGNOSIS . . . . . ...

165

U1000 CAN COMM CIRCUIT . . . . . . .

165

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

165

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

165

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

165

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

166

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

166

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

166

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

166

B257B, B257C AMBIENT SENSOR . . . ...

167

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

167

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

167

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

168

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

169

B2578, B2579 IN-VEHICLE SENSOR . . .

170

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

170

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

170

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

171

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

172

B2581, B2582 INTAKE SENSOR . . . . ...

173

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

173

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

173

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

173

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

174

B2630, B2631 SUNLOAD SENSOR . . . ...

176

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

176

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

176

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

177

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

178

B2632, B2633 AIR MIX DOOR MOTOR
(DRIVER SIDE) . . . . . . . . . . . ...

179

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

179

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

179

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

180

B2634, B2635 AIR MIX DOOR MOTOR (PAS-
SENGER SIDE) . . . . . . . . . . . ...

181

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

181

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

181

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

182

B2636, B2637, B2638, B2639, B2654, B2655
MODE DOOR MOTOR . . . . . . . . .

183

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

183

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

183

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

184

B263D, B263E, B263F INTAKE DOOR MO-
TOR . . . . . . . . . . . . . . . . .

186

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

186

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

186

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

187

HAC-4

B2661, B2662, B2663 UPPER VENTILATOR
DOOR MOTOR . . . . . . . . . . . .

188

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

188

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

188

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

189

BLOWER MOTOR . . . . . . . . . . ...

191

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

191

Component Function Check . . . . . . . .

191

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

191

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

194

MAGNET CLUTCH . . . . . . . . . . ..

195

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

195

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

195

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

195

POWER SUPPLY AND GROUND CIRCUIT ...

197

A/C AUTO AMP. . . . . . . . . . . . . . ..

197

A/C AUTO AMP. : Description . . . . . . . ...

197

A/C AUTO AMP. : Component Function Check .

197

A/C AUTO AMP. : Diagnosis Procedure . . . ...

197

ECU DIAGNOSIS INFORMATION . . . .

199

ECM . . . . . . . . . . . . . . . . .

199

Reference Value . . . . . . . . . . . . .

199

A/C AUTO AMP. . . . . . . . . . . . ..

214

Reference Value . . . . . . . . . . . . .

214

Wiring Diagram - AIR CONDITIONER CONTROL
SYSTEM - . . . . . . . . . . . . . . . ..

216

Fail-Safe . . . . . . . . . . . . . . . .

225

DTC Inspection Priority Chart . . . . . . . .

226

DTC Index . . . . . . . . . . . . . . . .

226

SYMPTOM DIAGNOSIS . . . . . . .

228

AIR CONDITIONER CONTROL . . . . . ..

228

Diagnosis Chart By Symptom . . . . . . . .

228

INSUFFICIENT COOLING . . . . . . . ...

229

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

229

Inspection procedure . . . . . . . . . . .

229

INSUFFICIENT HEATING . . . . . . . .

232

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

232

Inspection procedure . . . . . . . . . . .

232

NOISE . . . . . . . . . . . . . . . ...

235

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

235

Inspection procedure . . . . . . . . . . .

235

MEMORY FUNCTION DOES NOT OPERATE ..

237

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

237

Inspection procedure . . . . . . . . . . .

237

PRECAUTION . . . . . . . . . . ...

238

PRECAUTIONS . . . . . . . . . . . .

238

FOR USA AND CANADA . . . . . . . . . ...

238

FOR USA AND CANADA : Precaution for Supple-
mental Restraint System (SRS) "AIR BAG" and
"SEAT BELT PRE-TENSIONER" . . . . . . .

238

FOR MEXICO . . . . . . . . . . . . . . ..

238

FOR MEXICO : Precaution for Supplemental Re-
straint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" . . . . . . . . . . . ...

238

Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect . . . . . . . . .

239

Precaution for Procedure without Cowl Top Cover .

239

Precautions For Xenon Headlamp Service . . ...

239

Working with HFC-134a (R-134a) . . . . . . .

240

General Refrigerant Precaution . . . . . . .

240

Refrigerant Connection . . . . . . . . . . .

241

Service Equipment . . . . . . . . . . . .

243

COMPRESSOR . . . . . . . . . . . .

245

General Precautions . . . . . . . . . . . .

245

FLUORESCENT LEAK DETECTOR . . . .

246

General Precautions . . . . . . . . . . . .

246

DIAGNOSIS AND REPAIR WORKFLOW

HAC-5

< BASIC INSPECTION >

[WITHOUT 7 INCH DISPLAY]

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HAC

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000005514569

OVERALL SEQUENCE

*1: Refer to

HAC-106, "DTC Index"

.

*2: Refer to

HAC-108, "Diagnosis Chart By Symptom"

.

DETAILED FLOW

1.

OBTAIN INFORMATION ABOUT SYMPTOM

Interview the customer to obtain as much information as possible about the conditions and environment under
which the malfunction occurred.

>> GO TO 2.

2.

VERIFY SYMPTOM

Verify the symptom with operational check based on the information obtained from the customer. Refer to

HAC-7, "Description & Inspection"

.

>> GO TO 3.

JSIIA0943GB

HAC-6

< BASIC INSPECTION >

[WITHOUT 7 INCH DISPLAY]

DIAGNOSIS AND REPAIR WORKFLOW

3.

CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III

Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC. Refer to

HAC-106, "DTC Index"

.

Are self-diagnosis results normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

NARROW DOWN THE MALFUNCTIONING PARTS BY SYMPTOM DIAGNOSIS

Perform symptom diagnosis and narrow down the malfunctioning parts. Refer to

HAC-108, "Diagnosis Chart

By Symptom"

.

>> GO TO 5.

5.

REPAIR OR REPLACE

Repair or replace malfunctioning parts.
NOTE:
If DTC is displayed, erase DTC after repairing or replacing malfunctioning parts.

>> GO TO 6.

6.

FINAL CHECK

Check that the A/C system operates normally.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 3.