2011 INFINITI QX56 Factory Service Manual

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Page 3233 of 5598

INFINITI QX56 2011 Factory Service Manual
REAR A/C CONTROL COMMUNICATION SIGNAL
HAC-127
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
REAR A/C CONTROL COMMUNICATION SIGNAL
Diagnosis ProcedureINFOID:

Page 3234 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-128
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
REAR A/C SOLENOID VALVE
REAR A/C SOLENOID VALVE
Diagnosis ProcedureINFOID:0000000006275976
1.CHECK FUSE
1. Turn ignition switch OFF.
2. C

Page 3235 of 5598

INFINITI QX56 2011 Factory Service Manual
REAR A/C SOLENOID VALVEHAC-129
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
NO >> Repair harness or connector between rear A/C relay and fuse block (J/B).

Page 3236 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-130
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
REAR A/C SOLENOID VALVE
2. Check continuity between the r
ear A/C relay terminal 3 and 5
when the voltage is supplied between terminal 1

Page 3237 of 5598

INFINITI QX56 2011 Factory Service Manual
REAR BLOWER MOTORHAC-131
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
REAR BLOWER MOTOR
Diagnosis ProcedureINFOID:0000000006275978
1.CHECK FUSE
1. Turn ign

Page 3238 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-132
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
REAR BLOWER MOTOR
4. Change fan speed from Lo to Hi, and check duty rati
os between rear blower motor harness connector and
ground by usi

Page 3239 of 5598

INFINITI QX56 2011 Factory Service Manual
FRONT AUTOMATIC AIR CONDITIONING SYSTEMHAC-133
< SYMPTOM DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
SYMPTOM DIAGNOSIS
FRONT AUTOMATIC AIR CONDITIONING SYSTEM
Diagnosis

FRONT AUTOMATIC AIR CONDITIONING SYSTEMHAC-133
< SYMPTOM DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
SYMPTOM DIAGNOSIS
FRONT AUTOMATIC AIR CONDITIONING SYSTEM
Diagnosis Chart By SymptomINFOID:0000000006275980
NOTE:
Perform the self-diagnoses with CONSULT-III before per forming the symptom diagnosis. If DTC is detected,
perform the corresponding diagnosis.
Symptom Corresponding malfunction part Reference
Front air conditioning system does not activate.
Front air conditioning system cannot be con-
trolled.
Operation status of front air conditioning system is
not indicated on front dis-
play. Fail-safe activates Multi AV system
AV- 1 9 9 , "
Symptom Table"
Fail-safe does not acti-
vate Power supply system of A/C auto
amp.
A/C auto amp. HAC-110, "A/C AUTO AMP. : Diag-
nosis Procedure"
Air outlet does not change (Except upper ventila-
tion).
Front mode door motor does not operate normally. Circuit between front mode door
motor and A/C auto amp.
Front mode door motor control link-
age
Front mode door motor
A/C auto amp. HAC-112, "FRONT MODE DOOR
MOTOR : Diagnosis Procedure"
Upper ventilator door does not change.
Upper ventilator door motor does not operate nor-
mally. Circuit between upper ventilator
door motor and A/C auto amp.
Upper ventilator door motor installa- tion condition
Upper ventilator door motor
A/C auto amp. HAC-116, "UPPER VENTILATOR
DOOR MOTOR : Diagnosis Proce-
dure"
Discharge air temperature of driver side does not
change.
Front air mix door motor (driver side) does not op-
erate normally. Circuit between front air mix door
motor (driver side ) and A/C auto
amp.
Front air mix door motor (driver side)
installation condition
Front air mix door motor (driver side)
A/C auto amp. HAC-110, "FRONT AIR MIX DOOR
MOTOR (DRIVER SIDE) : Diagno-
sis Procedure"
Discharge air temperature of passenger side does
not change.
Front air mix door motor (passenger side) does not
operate normally. Circuit between front air mix door
motor (passenger side) and A/C
auto amp.
Front air mix door motor (passenger side) installation condition
Front air mix door motor (passenger side)
A/C auto amp. HAC-111, "FRONT AIR MIX DOOR
MOTOR (PASSENGER SIDE) : Di-
agnosis Procedure"
Intake door does not change.
Intake door motor does not operate normally.
Circuit between intake door motor
and A/C auto amp.
Intake door motor control linkage
Intake door motor
A/C auto amp. HAC-113, "INTAKE DOOR MOTOR
: Diagnosis Procedure"
All door motors do not operate normally.
Each door motor power supply and
ground circuit
A/C auto amp. HAC-118, "Diagnosis Procedure"
Front blower motor operation is malfunctioning. Power supply system of front blower
motor
Circuit between front blower motor and A/C auto amp..
Front blower motor
A/C auto amp. HAC-121, "Diagnosis Procedure"
Revision: 2010 May2011 QX56

Page 3240 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-134
< SYMPTOM DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
FRONT AUTOMATIC AIR CONDITIONING SYSTEM
Compressor does not operate. Circuit between magnet clutch and
IPDM E/R
Magnet clutch
IPDM E/R

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