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

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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"

.