2009 INFINITI QX56 Factory Service Manual

lumbar support fuse air filter flat tire coolant temperature battery capacity

Page 2377 of 4171

INFINITI QX56 2009 Factory Service Manual HAC-64
< COMPONENT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
REAR AIR CONTROL SYSTEM
Check voltage between rear air control (front) harness connector
R108 terminal 5 and ground.
Is the inspection result

Page 2378 of 4171

INFINITI QX56 2009 Factory Service Manual REAR AIR CONTROL SYSTEMHAC-65
< COMPONENT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector.
3. C

REAR AIR CONTROL SYSTEMHAC-65
< COMPONENT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector.
3. Check continuity between A/C auto amp. harness connector M50 terminal 49 and terminal 50.
Is the inspection result normal?
YES >> Replace A/C auto amp. Refer to VTL-7, "Removal and
Installation".
NO >> GO TO 7.
7.CHECK AIR MIX DOOR MOTOR (REAR) CIRCUITS FOR SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the air mix door motor (rear) harness connector.
3. Check continuity between A/C auto amp. harness connector M50 terminal 49, 50 and ground.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace harness as necessary.
8.CHECK AIR MIX DOOR MOTOR (REAR) CIRCUITS FOR OPEN
1. Disconnect the air mix door motor (rear) harness connector.
2. Check continuity between A/C auto amp. harness connector M50 (A) terminal 49, 50 and the air mix door motor (rear) har-
ness connector B155 (B) terminal 1, 6.
Is the inspection result normal?
YES >> Replace air mix door motor (rear). Refer to VTL-26,
"Removal and Installation".
NO >> Repair or replace harness as necessary.
9.CHECK A/C AUTO AMP. OWER AND GROUND FOR AIR MIX DOOR MOTOR (REAR)
1. Rotate temperature control dial (front) to maximum cold.
2. Check voltage between A/C auto amp. harness connector M50 terminal 49 and terminal 50 while rotating temperature control
dial (rear) to maximum heat.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Replace A/C auto amp. Refer to VTL-7, "
Removal and Installation".
10.CHECK A/C AUTO AMP. FOR AIR MIX DOOR MOTOR (REAR) PBR POWER AND GROUND
Continuity should exist.
AWIIA0138ZZ
49 - Ground
: Continuity should not exist.
50 - Ground : Continuity should not exist.
AWIIA0136ZZ
49 - 1 : Continuity should exist.
50 - 6 : Continuity should exist.
AWIIA0139ZZ
ConnectorTe r m i n a l s
Condition Voltage
(Approx.)
(+) (-)
A/C auto amp.: M50 50 49 Rotate temp
control dial Battery
voltage
AWIIA0137ZZ
Revision: December 20092009 QX56

Page 2379 of 4171

INFINITI QX56 2009 Factory Service Manual HAC-66
< COMPONENT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
REAR AIR CONTROL SYSTEM
1. Check voltage between A/C auto amp. harness connector M50
(A) terminal 28 and M49 (B) terminal 3.
Is the inspection

Page 2380 of 4171

INFINITI QX56 2009 Factory Service Manual REAR AIR CONTROL SYSTEMHAC-67
< COMPONENT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Check voltage between A/C auto amp. harness connector M50 ter-
minal 33 and ground w

Page 2381 of 4171

INFINITI QX56 2009 Factory Service Manual HAC-68
< COMPONENT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
REAR AIR CONTROL SYSTEM
Check voltage between rear air control (front) harness connector
R108 terminal 5 and ground.
Is the inspection result

Page 2382 of 4171

INFINITI QX56 2009 Factory Service Manual REAR AIR CONTROL SYSTEMHAC-69
< COMPONENT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector.
3. C

Page 2383 of 4171

INFINITI QX56 2009 Factory Service Manual HAC-70
< COMPONENT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
REAR AIR CONTROL SYSTEM
Check voltage between A/C auto amp. harness connector M50 (A)
terminal 28 and M49 (B) terminal 3.
Is the inspection re

Page 2384 of 4171

INFINITI QX56 2009 Factory Service Manual REAR AIR CONTROL SYSTEMHAC-71
< COMPONENT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Check voltage between A/C auto amp. harness connector M50 ter-
minal 30 and ground w

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