2009 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2009  Factory Service Manual HAC-8
< FUNCTION DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
FUNCTION INFORMATION
PASSENGER COMPARTMENT
1. A/C auto amp. M49, M50
2. In-vehicle sensor M323. Intake sensor M146
4. Intake door motor M58 5. V

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INFINITI QX56 2009  Factory Service Manual FUNCTION INFORMATIONHAC-9
< FUNCTION DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
REAR PASSENGER COMPARTMENT
Symptom TableINFOID:0000000003775328
1. Rear blower control (r

Page 2323 of 4171

INFINITI QX56 2009  Factory Service Manual HAC-10
< FUNCTION DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
FUNCTION INFORMATION
Defroster door motor is malfunctioning. Go to Trouble Diagnosis Procedure for Defroster Door Motor.
HAC-46
Front blower mo

Page 2324 of 4171

INFINITI QX56 2009  Factory Service Manual REFRIGERATION SYSTEMHAC-11
< FUNCTION DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
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K L
M A
B
HAC
N
O P
REFRIGERATION SYSTEM
Refrigerant CycleINFOID:0000000004040375
REFRIGERANT FLOW
The refri

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INFINITI QX56 2009  Factory Service Manual HAC-12
< FUNCTION DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
REFRIGERATION SYSTEM
cm2, 433.6 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into
the atmo

Page 2326 of 4171

INFINITI QX56 2009  Factory Service Manual AUTOMATIC AIR CONDITIONER SYSTEMHAC-13
< FUNCTION DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
AUTOMATIC AIR CONDITIONER SYSTEM
Control System DiagramINFOID:00000000037753

Page 2327 of 4171

INFINITI QX56 2009  Factory Service Manual HAC-14
< FUNCTION DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
AUTOMATIC AIR CONDITIONER SYSTEM
A/C auto amp.
DISPLAY SCREEN
Displays the operational status of the system.
AUTO SWITCH 
• The compressor, i

Page 2328 of 4171

INFINITI QX56 2009  Factory Service Manual AUTOMATIC AIR CONDITIONER SYSTEMHAC-15
< FUNCTION DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Rear Air Controls
REAR TEMPERATURE CONTROL DIAL (FRONT/REAR)
The temperature