Nissan Altima L32. Instruction — part 807

HAC-2

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

61

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

61

ECU DIAGNOSIS . . . . . . . . . .

63

AIR CONDITIONER CONTROL . . . . . .

63

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

63

Wiring Diagram - Air Conditioner Control (Auto) -
Coupe . . . . . . . . . . . . . . . . . .

65

Wiring Diagram - Air Conditioner Control (Auto) -
Sedan . . . . . . . . . . . . . . . . . .

74

SYMPTOM DIAGNOSIS . . . . . . . .

83

AIR CONDITIONER CONTROL . . . . . .

83

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

83

INSUFFICIENT COOLING . . . . . . . . .

84

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

84

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

85

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

87

Trouble Diagnosis For Abnormal Pressure . . . .

88

INSUFFICIENT HEATING . . . . . . . . .

92

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

92

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

94

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

94

SELF-DIAGNOSIS CANNOT BE PER-
FORMED . . . . . . . . . . . . . . .

96

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

96

MEMORY FUNCTION DOES NOT OPERATE ...

97

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

97

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

98

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

98

Supplemental Restraint System (SRS) "AIR BAG"
and "SEAT BELT PRE-TENSIONER" . . . . ....

98

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

98

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

98

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

99

MANUAL AIR CONDITIONER

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

101

DIAGNOSIS AND REPAIR WORKFLOW . ...

101

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

101

INSPECTION AND ADJUSTMENT . . . . .

102

Description & Conditions . . . . . . . . . ...

102

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

102

FUNCTION DIAGNOSIS . . . . . . .

104

FUNCTION INFORMATION . . . . . . .

104

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

104

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

106

AIR CONDITIONER CONTROL . . . . . ...

107

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

107

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

107

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

113

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

113

DIAGNOSIS SYSTEM (ECM) . . . . . . ...

114

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

114

COMPONENT DIAGNOSIS . . . . . ..

115

LAN SYSTEM CIRCUIT . . . . . . . . ...

115

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

115

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

115

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

118

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

118

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

119

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

121

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

121

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

122

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

124

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

124

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

124

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

126

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

126

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

126

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

127

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

131

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

131

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

131

POWER SUPPLY AND GROUND CIRCUIT
FOR FRONT AIR CONTROL . . . . . . ...

135

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

135

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

135

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

135

ECU DIAGNOSIS . . . . . . . . . ..

137

AIR CONDITIONER CONTROL . . . . . ...

137

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

137

Wiring Diagram - Air Conditioner Control (Instruction)
- Coupe . . . . . . . . . . . . . . . . .

139

Wiring Diagram - Air Conditioner Control (Instruction)
- Sedan . . . . . . . . . . . . . . . . .

147

SYMPTOM DIAGNOSIS . . . . . . ...

155

AIR CONDITIONER CONTROL . . . . . ...

155

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

155

INSUFFICIENT COOLING . . . . . . . .

156

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

156

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

157

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

159

Trouble Diagnosis For Abnormal Pressure . . ...

160

HAC-3

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

INSUFFICIENT HEATING . . . . . . . .

164

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

164

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

166

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

166

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

168

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

168

Supplemental Restraint System (SRS) "AIR BAG"
and "SEAT BELT PRE-TENSIONER" . . . . ...

168

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

168

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

168

Precaution for Service Equipment . . . . . . .

169

HAC-4

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000004498185

DETAILED 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.

VERIFY THE SYMPTOM WITH OPERATIONAL CHECK

Verify the symptom with operational check. Refer to

HAC-5, "Description and Conditions"

.

>> GO TO 3

3.

GO TO APPROPRIATE TROUBLE DIAGNOSIS

Go to appropriate trouble diagnosis. Refer to

HAC-83, "Symptom Matrix Chart"

below.

>> GO TO 4

4.

REPAIR OR REPLACE

Repair or replace the specific parts.

>> GO TO 5

5.

FINAL CHECK

Final check.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 3

INSPECTION AND ADJUSTMENT

HAC-5

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

INSPECTION AND ADJUSTMENT

Description and Conditions

INFOID:0000000004498186

DESCRIPTION

The purpose of the operational check is to confirm that the system operates properly.

CONDITIONS:

• Engine running and at normal operation temperature.

Operational Check

INFOID:0000000004498187

STEP 1: Check Blower

1. Turn blower control dial clockwise, blower should operate on low speed.
2. Continue turning blower control dial clockwise, and continue checking blower speeds until all speeds are

checked.

3. Leave blower on HI speed.
If NG, go to

HAC-42, "Diagnosis Procedure"

.

If OK, continue with next check.

STEP 2: Check Discharge Air

1. Press each mode switch and press DEF (

) switch.

2. Each mode position indicator should illuminate.
3. Confirm that discharge air comes out according to the air distribution table. Refer to

HAC-14, "System

Description"

.

NOTE:

Confirm that the compressor clutch is engaged (audio or visual inspection) and intake door is in the FRE
(

) position when the DEF (

) is selected.

Intake door position is checked in the next step.

If NG, go to

HAC-32, "Diagnosis Procedure"

.

If OK, continue with next check.

STEP 3: Check Recirculation

1. Press REC (

) switch.

Recirculation indicator should illuminate.

2. Press REC (

) switch a second time.

3. Listen for intake door position change (you should hear blower sound change slightly).
If NG, go to

HAC-35, "Diagnosis Procedure"

.

If OK, continue with next check.

STEP 4: Check Temperature Decrease

1. Turn the temperature dial counterclockwise to 18

°C (60F°).

2. Check for cold air at discharge air outlets.
If NG, go to

HAC-84, "Component Function Check"

.

If OK, continue with next check.

STEP 5: Check Temperature Increase

1. Turn the temperature dial clockwise to 32

°C (90°F).

2. Check for hot air at discharge air outlets.
If NG, go to

HAC-92, "Component Function Check"

.

If OK, continue with next check.

STEP 6: Check AUTO Mode

1. Press the AUTO switch.