Infiniti QX56 (JA60). Manual — part 615

INSUFFICIENT HEATING

HAC-117

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Check engine coolant temperature sensor. Refer to

EC-123, "Component Inspection"

.

Is the inspection result normal?

YES

>> System OK.

NO

>> Repair or replace as necessary. Retest.

9.

CHECK HEATER HOSES

Check heater hoses for proper installation.
Is the inspection result normal?

YES

>> System OK.

NO

>> 1. Back flush heater core.

2. Drain the water from the system.

3. Refill system with new engine coolant. Refer to

CO-11, "Changing Engine Coolant"

.

4. GO TO 10 to retest.

10.

CHECK HEATER HOSE TEMPERATURES

1. Start engine and warm it up to normal operating temperature.

2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be

warm.

Is the inspection result normal?

YES

>> System OK.

NO

>> Replace heater core. Refer to

VTL-24, "Removal and Installation"

.

11.

CHECK WATER VALVE

Check the operation of the water valve. Refer to

HAC-73, "Water Valve Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> System OK.

NO

>> Replace water valve.

HAC-118

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

NOISE

NOISE

Component Function Check

INFOID:0000000005147740

SYMPTOM: Noise

INSPECTION FLOW

*1

HAC-4, "Operational Check (Front)"

or

HAC-5, "Operational Check

(Rear)"

*2

EM-13, "Checking Drive Belts"

*3

HAC-111, "Performance Chart"

AWIIA1001GB

NOISE

HAC-119

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

*4

HA-47, "Removal and Installation for
Front Expansion Valve"

*5

HA-32, "Removal and Installation for
Compressor Clutch"

*6

HA-32, "Removal and Installation for
Compressor Clutch"

*7

HA-31, "Removal and Installation for
Compressor"

*8

HA-22, "Maintenance of Oil Quantity
in Compressor"

*9

HA-44, "Removal and Installation for
Condenser"

HAC-120

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

MEMORY FUNCTION DOES NOT OPERATE

MEMORY FUNCTION DOES NOT OPERATE

Memory Function Check

INFOID:0000000005147741

SYMPTOM: Memory function does not operate.

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MEMORY FUNCTION

1. Set the temperature to 32

°C (90°F).

2. Rotate the front blower control dial (driver) to turn system OFF.

3. Turn ignition switch OFF.

4. Turn ignition switch ON.

5. Press the AUTO switch.

6. Confirm that the set temperature remains at previous temperature.

7. Rotate the front blower control dial (LH) to turn system OFF.
Can the symptom be duplicated?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

PERFORM COMPLETE OPERATIONAL CHECK

Perform a complete operational check and check for any symptoms. Refer to

HAC-4, "Operational Check

(Front)"

.

Can a symptom be duplicated?

YES

>> Refer to

HAC-3, "How to Perform Trouble Diagnosis For Quick And Accurate Repair"

.

NO

>> System OK.

3.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

4.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis to check for any codes. Refer to

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

.

Are any self-diagnosis codes present?

YES

>> Refer to

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

.

NO

>> GO TO 5.

5.

CHECK POWER AND GROUND CIRCUIT

Check main power supply and ground circuit. Refer to

HAC-86, "A/C Auto Amp. Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace as necessary.

6.

RECHECK FOR SYMPTOMS

Perform a complete operational check for any symptoms. Refer to

HAC-4, "Operational Check (Front)"

.

Does another symptom exist?

YES

>> Refer to

HAC-3, "How to Perform Trouble Diagnosis For Quick And Accurate Repair"

.

NO

>> Replace A/C Auto amp. Refer to

VTL-7, "Removal and Installation"

.