Nissan Frontier. Manual - part 862

HAC-2

OPTICAL SENSOR  ...........................................

54

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

54

Optical Sensor Diagnosis Procedure ......................

54

INTAKE SENSOR ..............................................

56

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

56

Intake Sensor Diagnosis Procedure  .......................

56

Intake Sensor Component Inspection  ....................

57

POWER SUPPLY AND GROUND CIRCUIT 
FOR CONTROLLER ..........................................

59

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

59

Front Air Control Component Function Check ........

59

Front Air Control Power and Ground Diagnosis 
Procedure ...............................................................

59

ECU DIAGNOSIS INFORMATION ..............

61

AIR CONDITIONER CONTROL  ........................

61

Front Air Control Terminals Reference Values  .......

61

WIRING DIAGRAM  .....................................

63

AIR CONDITIONER CONTROL  ........................

63

Wiring Diagram - Automatic Air Conditioner  ...........

63

SYMPTOM DIAGNOSIS  .............................

72

AIR CONDITIONER CONTROL  ........................

72

Symptom Matrix Chart ..........................................

72

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

73

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

73

Diagnostic Work Flow .............................................

74

Performance Chart  .................................................

76

Trouble Diagnoses for Abnormal Pressure  ............

77

INSUFFICIENT HEATING  .................................

81

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

81

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

83

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

83

MEMORY FUNCTION DOES NOT OPERATE ...

85

Memory Function Check .........................................

85

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

86

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

86

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................

86

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

86

Precaution for Service Equipment  ..........................

87

MANUAL A/C (TYPE 1)

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

88

MANUAL A/C IDENTIFICATION TABLE ..........

88

Application Table  ....................................................

88

DIAGNOSIS AND REPAIR WORKFLOW .........

89

How to Perform Trouble Diagnosis For Quick And 
Accurate Repair  ......................................................

89

INSPECTION AND ADJUSTMENT ...................

90

Operational Check  ..................................................

90

SYSTEM DESCRIPTION  ...........................

91

MANUAL A/C IDENTIFICATION TABLE ..........

91

Application Table  ....................................................

91

FUNCTION INFORMATION  ..............................

92

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

92

REFRIGERATION SYSTEM ..............................

94

Refrigerant Cycle  ....................................................

94

Refrigerant System Protection ................................

94

MANUAL AIR CONDITIONER SYSTEM  ..........

95

Control System Diagram .........................................

95

Control System Description ....................................

95

Discharge Air Flow ..................................................

96

Switches And Their Control Function ......................

97

DIAGNOSIS SYSTEM (BCM) ............................

99

COMMON ITEM .........................................................

99

COMMON ITEM : CONSULT Function (BCM - 
COMMON ITEM)  ....................................................

99

AIR CONDITIONER ...................................................

99

AIR CONDITIONER : CONSULT Function (BCM - 
AIR CONDITIONER) .............................................

100

SELF-DIAGNOSIS FUNCTION  ........................

101

Front Air Control Self-Diagnosis  ...........................

101

Front Air Control Self-Diagnosis Chart ..................

101

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

102

MANUAL A/C IDENTIFICATION TABLE .........

102

Application Table  ..................................................

102

MODE DOOR MOTOR  .....................................

103

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

103

Mode Door Motor Component Function Check  ....

103

Mode Door Motor Diagnosis Procedure ................

104

AIR MIX DOOR MOTOR  ..................................

107

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

107

Air Mix Door Motor Component Function Check  ..

108

Air Mix Door Motor Diagnosis Procedure ..............

108

INTAKE DOOR MOTOR ...................................

112

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

112

Intake Door Motor Component Function Check ....

112

Intake Door Motor Diagnosis Procedure ...............

113

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

115

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

115

Front Blower Motor Component Function Check ..

115

Front Blower Motor Diagnosis Procedure  .............

116

Front Blower Motor Component Inspection  ..........

119

HAC-3

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

121

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

121

Magnet Clutch Component Function Check  .........

121

Magnet Clutch Diagnosis Procedure .....................

121

INTAKE SENSOR  ............................................

125

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

125

Intake Sensor Diagnosis Procedure ......................

125

Intake Sensor Component Inspection ...................

126

POWER SUPPLY AND GROUND CIRCUIT 
FOR CONTROLLER  ........................................

128

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

128

Front Air Control Component Function Check  ......

128

Front Air Control Power and Ground Diagnosis 
Procedure ..............................................................

128

ECU DIAGNOSIS INFORMATION  ............

130

MANUAL A/C IDENTIFICATION TABLE  ........

130

Application Table ...................................................

130

AIR CONDITIONER CONTROL .......................

131

Front Air Control Terminals Reference Values  .....

131

WIRING DIAGRAM ....................................

133

AIR CONDITIONER CONTROL .......................

133

Wiring Diagram - With Type 1  ...............................

133

SYMPTOM DIAGNOSIS  ............................

141

MANUAL A/C IDENTIFICATION TABLE  ........

141

Application Table ...................................................

141

AIR CONDITIONER CONTROL .......................

142

Symptom Matrix Chart .........................................

142

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

143

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

143

Diagnostic Work Flow  ...........................................

144

Performance Chart ................................................

146

Trouble Diagnoses for Abnormal Pressure  ...........

147

INSUFFICIENT HEATING  ................................

151

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

151

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

153

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

153

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

155

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

155

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...............................................................

155

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

155

Precaution for Service Equipment .........................

156

MANUAL A/C (TYPE 2)

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

157

MANUAL A/C IDENTIFICATION TABLE  .......

157

Application Table  ...................................................

157

DIAGNOSIS AND REPAIR WORKFLOW  ......

158

How to Perform Trouble Diagnosis For Quick And 
Accurate Repair .....................................................

158

INSPECTION AND ADJUSTMENT  ................

159

Operational Check .................................................

159

SYSTEM DESCRIPTION  ...........................

161

MANUAL A/C IDENTIFICATION TABLE  .......

161

Application Table  ...................................................

161

FUNCTION INFORMATION ............................

162

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

162

REFRIGERATION SYSTEM  ...........................

164

Refrigerant Cycle ...................................................

164

Refrigerant System Protection ...............................

164

MANUAL AIR CONDITIONER SYSTEM  ........

165

Control System Diagram  .......................................

165

Control System Description  ...................................

165

Discharge Air Flow  ................................................

166

Switches And Their Control Function  ....................

167

DIAGNOSIS SYSTEM (BCM)  .........................

169

COMMON ITEM  .......................................................

169

COMMON ITEM : CONSULT Function (BCM - 
COMMON ITEM)  ...................................................

169

AIR CONDITIONER  .................................................

169

AIR CONDITIONER : CONSULT Function (BCM - 
AIR CONDITIONER)  .............................................

170

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

171

MANUAL A/C IDENTIFICATION TABLE  .......

171

Application Table  ...................................................

171

MODE DOOR MOTOR ....................................

172

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

172

Mode Door Motor Component Function Check  .....

172

Mode Door Motor Diagnosis Procedure  ................

173

AIR MIX DOOR MOTOR  .................................

176

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

176

Air Mix Door Motor Component Function Check  ...

177

Air Mix Door Motor Diagnosis Procedure  ..............

177

INTAKE DOOR MOTOR  .................................

180

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

180

Intake Door Motor Component Function Check  ....

180

Intake Door Motor Diagnosis Procedure  ...............

181

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

182

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

182

Front Blower Motor Component Function Check ..

182

Front Blower Motor Diagnosis Procedure ..............

183

Front Blower Motor Component Inspection  ...........

186

HAC-4

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

188

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

188

Magnet Clutch Component Function Check ..........

188

Magnet Clutch Diagnosis Procedure  .....................

188

INTAKE SENSOR ............................................

192

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

192

Intake Sensor Diagnosis Procedure  ......................

192

Intake Sensor Component Inspection  ...................

193

POWER SUPPLY AND GROUND CIRCUIT 
FOR CONTROLLER ........................................

195

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

195

Front Air Control Component Function Check .......

195

Front Air Control Power and Ground Diagnosis 
Procedure ..............................................................

195

ECU DIAGNOSIS INFORMATION .............

197

MANUAL A/C IDENTIFICATION TABLE ........

197

Application Table  ...................................................

197

AIR CONDITIONER CONTROL  ......................

198

Front Air Control Terminals Reference Values  ......

198

WIRING DIAGRAM  ....................................

200

AIR CONDITIONER CONTROL  ......................

200

Wiring Diagram - With Type 2  ...............................

200

SYMPTOM DIAGNOSIS  ...........................

207

MANUAL A/C IDENTIFICATION TABLE .........

207

Application Table  ..................................................

207

AIR CONDITIONER CONTROL  .......................

208

Symptom Matrix Chart .........................................

208

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

209

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

209

Diagnostic Work Flow  ...........................................

210

Performance Chart ................................................

212

Trouble Diagnoses for Abnormal Pressure ...........

213

INSUFFICIENT HEATING  ................................

217

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

217

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

219

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

219

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

221

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

221

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...............................................................

221

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

221

Precaution for Service Equipment ........................

222

DIAGNOSIS AND REPAIR WORKFLOW

HAC-5

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

How to Perform Trouble Diagnosis For Quick And Accurate Repair

INFOID:0000000009478259

WORK FLOW

1.

LISTEN TO CUSTOMER COMPLAINT

Listen to customer complaint. Get detailed information about the conditions and environment when the symp-

tom occurs.

>> GO TO 2

2.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 3.

3.

VERIFY THE SYMPTOM WITH OPERATIONAL CHECK

Verify the symptom with operational check. Refer to 

HAC-6, "Operational Check"

. 

Can a symptom be duplicated?

YES

>> GO TO 4

NO

>> GO TO 5

4.

GO TO APPROPRIATE TROUBLE DIAGNOSIS

Go to appropriate trouble diagnosis. Refer to 

HAC-72, "Symptom Matrix Chart"

.

Can a symptom be duplicated?

>> GO TO 5.

5.

PERFORM THE FRONT AIR CONTROL SELF-DIAGNOSIS

Perform front air control self-diagnosis. Refer to 

HAC-20, "Front Air Control Self-Diagnosis"

.

>> If any diagnostic trouble codes set. Refer to 

HAC-20, "Front Air Control Self-Diagnosis Code

Chart"

.

>> Confirm the repair by performing operational check. Refer to 

HAC-6, "Operational Check"

.