Nissan Frontier. Manual - part 879

HAC-70

< WIRING DIAGRAM >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

ABIIA1244GB

AIR CONDITIONER CONTROL

HAC-71

< WIRING DIAGRAM >

[AUTOMATIC AIR CONDITIONER]

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ABIIA1035GB

HAC-72

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

SYMPTOM DIAGNOSIS

AIR CONDITIONER CONTROL

Symptom Matrix Chart

INFOID:0000000009478308

SYMPTOM TABLE

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-59

A/C system cannot be controlled.

Go to Self-diagnosis Function.

HAC-20

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.

HAC-22

Mode door motor is malfunctioning.

Discharge air temperature does not change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.

HAC-26

Air mix door motor is malfunctioning.

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.

HAC-34

Intake door motor is malfunctioning.

Front blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-37

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-43

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-73

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-81

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-83

Self-diagnosis cannot be performed.

Go to Trouble Diagnosis Procedure for Self-diagnosis.

HAC-20

Memory function does not operate.

Go to Trouble Diagnosis Procedure for Memory Function.

HAC-85

INSUFFICIENT COOLING

HAC-73

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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INSUFFICIENT COOLING

Component Function Check

INFOID:0000000009478309

SYMPTOM: Insufficient cooling

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE 

1. Press the AUTO switch.

2. Turn temperature control dial (driver) counterclockwise until 18

°C (60°F) is displayed.

3. Check for cold air at discharge air outlets.
Can the symptom be duplicated?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FOR ANY SYMPTOMS 

Perform a complete operational check for any symptoms. Refer to 

HAC-6, "Operational Check"

.

Does another symptom exist?

YES

>> Refer to 

HAC-72, "Symptom Matrix Chart"

. 

NO

>> System OK.

3.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

4.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis Refer to 

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

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Refer to 

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

.

5.

CHECK DRIVE BELTS 

Check compressor belt tension. Refer to 

EM-129, "Checking Drive Belts"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Adjust or replace compressor belt. Refer to 

EM-129, "Removal and Installation"

.

6.

CHECK AIR MIX DOOR OPERATION

Check and verify air mix door mechanism for smooth operation. Refer to 

HAC-26, "Air Mix Door Motor (Driver)

Component Function Check"

.

Does air mix door operate correctly?

YES

>> GO TO 7.

NO

>> Check air mix door motor circuit. Refer to 

HAC-26, "Air Mix Door Motor (Driver) Diagnosis Proce-

dure"

 or 

HAC-29, "Air Mix Door Motor (Passenger) Diagnosis Procedure"

.

7.

CHECK COOLING FAN MOTOR OPERATION

Check and verify cooling fan motor for smooth operation. Refer to 

EC-839, "Overall Function Check"

.

Does cooling fan motor operate correctly?

YES

>> GO TO 8.

NO

>> Check cooling fan motor. Refer to 

EC-840, "Diagnosis Procedure"

.

8.

CHECK RECOVERY/RECYCLING EQUIPMENT BEFORE USAGE

Check recovery/recycling equipment before connecting to vehicle. Verify there is no pressure in the recovery/

recycling equipment by checking the gauges. If pressure exists, recover refrigerant from equipment lines.