INFINITI QX56 2010 Factory Service Manual

AIR CONDITIONER CONTROLHAC-101
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ABIIA0310GB
Revision: April 20092010 QX56

HAC-102
< ECU DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
AIR CONDITIONER CONTROL
ABIIA0059GB
Revision: April 20092010 QX56

AIR CONDITIONER CONTROLHAC-103
< ECU DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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ABIIA0311GB
Revision: April 20092010 QX56

HAC-104
< ECU DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
AIR CONDITIONER CONTROL
ABIIA0061GB
Revision: April 20092010 QX56

AIR CONDITIONER CONTROLHAC-105
< ECU DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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ABIIA0062GB
Revision: April 20092010 QX56

HAC-106
< ECU DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
AIR CONDITIONER CONTROL
ABIIA0281GB
Revision: April 20092010 QX56

AIR CONDITIONER CONTROLHAC-107
< SYMPTOM DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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SYMPTOM DIAGNOSIS
AIR CONDITIONER CONTROL
Symptom Matrix ChartINFOID: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- 6 9
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 coolingGo to Trouble Diagnosis Procedure for Insufficient Cooling. HAC-108
Insufficient heatingGo to Trouble Diagnosis Procedure for Insufficient Heating. HAC-116
NoiseGo 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
Revision: April 20092010 QX56

HAC-108
< SYMPTOM DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
INSUFFICIENT COOLING
INSUFFICIENT COOLING
Component Function CheckINFOID:0000000005147735
SYMPTOM: Insufficient cooling
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPER
ATIONAL 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, "SymptomMatrixChart".
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.
Revision: April 20092010 QX56

INSUFFICIENT COOLINGHAC-109
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NO >> Check water valve circuit. Refer to HAC-73, "Water Valve Diagnosis Procedure".
9.CHECK RECOVERY/RECYCLING EQUIPMENT BEFORE USAGE
Check recovery/recycling equipment befor e 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.
>> GO TO 10.
10.CHECK REFRIGERANT PURITY
1. Connect recovery/recycling equipment to vehicle.
2. Confirm refrigerant purity in supply tank us ing recovery/recycling and refrigerant identifier.
Is the inspection result normal?
YES >> GO TO 11.
NO >> Check contaminated refrigerant. Refer to HAC-121, "
Working with HFC-134a (R-134a)".
11 .CHECK FOR EVAPORATOR FREEZE UP
Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up?
YES >> Perform performance test diagnoses. Refer to HAC-109, "Diagnostic Work Flow".
NO >> GO TO 12.
12.CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to HAC-111, "
Performance Chart".
Is the inspection result normal?
YES >> Perform performance test diagnoses. Refer to HAC-109, "Diagnostic Work Flow".
NO >> GO TO 13.
13.CHECK AIR DUCTS
Check ducts for air leaks.
Is the inspection result normal?
YES >> System OK.
NO >> Repair air leaks.
Diagnostic Work FlowINFOID:0000000005147736
Revision: April 20092010 QX56

HAC-110
< SYMPTOM DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
INSUFFICIENT COOLING
*1
HA-24, "Checking System for Leaks
Using the Fluorescent Dye Leak De-
tector"
*2HA-31, "Removal and Installation for
Compressor"
*3HAC-111, "Performance Chart"
*4HAC-112, "Trouble Diagnoses for Ab-
normal Pressure"
*5HAC-31, "Air Mix Door Motor (Driver)
Component Function Check"
AWIIA0999GB
Revision: April 20092010 QX56