Infiniti QX56 (JA60). Manual - part 612

AIR CONDITIONER CONTROL

HAC-105

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

ABIIA0062GB

HAC-106

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

ABIIA0281GB

AIR CONDITIONER CONTROL

HAC-107

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

SYMPTOM DIAGNOSIS

AIR CONDITIONER CONTROL

Symptom Matrix Chart

INFOID:0000000005147734

SYMPTOM TABLE

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-86

A/C system display is malfunctioning.

Go to Navigation System.

AV-69

A/C system cannot be controlled.

Go to Self-diagnosis Function.

HAC-23

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.

HAC-26

Mode door motor is malfunctioning.

Discharge air temperature does not change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.

HAC-31

Air mix door motor is malfunctioning.

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.

HAC-40

Intake door motor is malfunctioning.

Defroster door motor is malfunctioning.

Go to Trouble Diagnosis Procedure for Defroster Door Motor.

HAC-43

Front blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-48

Rear blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Rear Blower Motor.

HAC-53

Rear discharge air temperature and/or air 
outlet does not change.

Go to Trouble Diagnosis Procedure for Rear Air Control circuit.

HAC-58

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-68

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-108

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-116

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-118

Self-diagnosis cannot be performed.

Go to Trouble Diagnosis Procedure for Self-diagnosis.

HAC-86

Memory function does not operate.

Go to Trouble Diagnosis Procedure for Memory Function.

HAC-120

HAC-108

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT COOLING

INSUFFICIENT COOLING

Component Function Check

INFOID:0000000005147735

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-4, "Operational Check (Front)"

.

Does another symptom exist?

YES

>> Refer to 

HAC-107, "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-23, "A/C Auto Amp. Self-Diagnosis"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Refer to 

HAC-24, "A/C System Self-Diagnosis Code Chart"

.

5.

CHECK DRIVE BELTS 

Check compressor belt tension. Refer to 

EM-13, "Checking Drive Belts"

.

Is the inspection result normal?

OK

>> GO TO 6.

NG

>> Adjust or replace compressor belt. Refer to 

EM-13, "Removal and Installation"

.

6.

CHECK AIR MIX DOOR OPERATION

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

HAC-31, "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-32, "Air Mix Door Motor (Driver) Diagnosis Proce-

dure"

 or 

HAC-35, "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-392, "Component Inspection"

.

Does cooling fan motor operate correctly?

YES

>> GO TO 8.

NO

>> Check cooling fan motor. Refer to 

EC-392, "Diagnosis Procedure"

.

8.

CHECK WATER VALVE OPERATION

Check and verify water valve for smooth operation. Refer to 

HAC-73, "Description"

.

Does water valve operate correctly?

YES

>> GO TO 9.