2011 INFINITI QX56 Factory Service Manual

oil pressure dashboard 4WD towing coolant reservoir roof rack

Page 3217 of 5598

INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITHAC-111
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK

POWER SUPPLY AND GROUND CIRCUITHAC-111
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor LH connector.
3. Check continuity between front air mix door motor LH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF FRONT AI R MIX DOOR MOTOR (DRIVER SIDE)
Check front air mix door motor (driver side) is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace front air mix door motor (driver side). Refer to HAC-153, "AIR MIX DOOR MOTOR :
Removal and Installation".
NO >> Repair or replace malfunctioning part.
4.CHECK FRONT AIR MIX DOOR MOTOR (DRIVER SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor LH connector and A/C auto amp. connector.
3. Check continuity between front air mix door moto r LH harness connector and A/C auto amp. harness con-
nector.
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Repair harness or connector.
FRONT AIR MIX DOOR MO TOR (PASSENGER SIDE)
FRONT AIR MIX DOOR MOTOR (PASSEN GER SIDE) : Diagnosis Procedure
INFOID:0000000006275950
1.CHECK FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between front air mix door motor RH harness connector and ground.
+
−Vol tag e
(Approx.)
Front air mix door motor LH
Connector Terminal M252 1 Ground 12 V
Front air mix door motor LH —Continuity
Connector Terminal
M252 2 Ground Existed
Front air mix door motor LH A/C auto amp. Continuity
Connector Terminal Connector Terminal
M252 1 M50 17 Existed
+ −Vol tag e
(Approx.)
Front air mix door motor RH
Connector Terminal M255 1 Ground 12 V
Revision: 2010 May2011 QX56

Page 3218 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-112
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT AIR MIX DOOR MOTO
R (PASSEN

HAC-112
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT AIR MIX DOOR MOTO
R (PASSENGER SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor RH connector.
3. Check continuity between front air mi x door motor RH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
Check front air mix door motor (passenger side) is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace front air mix door motor (passenger side). Refer to HAC-153, "AIR MIX DOOR MOTOR :
Removal and Installation".
NO >> Repair or replace malfunctioning part.
4.CHECK FRONT AIR MIX DOOR MOTOR (P ASSENGER SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor RH connector and A/C auto amp. connector.
3. Check continuity between front air mix door motor RH harness connector and A/C auto am\
p. harness con- nector.
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Repair harness or connector.
FRONT MODE DOOR MOTOR
FRONT MODE DOOR MOTOR : Diagnosis ProcedureINFOID:0000000006275951
1.CHECK FRONT MODE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between front mode door motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT MODE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front mode door motor connector.
Front air mix door motor RH —Continuity
Connector Terminal
M255 2 Ground Existed
Front air mix door motor RH A/C auto amp. Continuity
Connector Terminal Connector Terminal
M255 1 M50 17 Existed
+ −Voltage
(Approx.)
Front mode door motor
Connector Terminal M253 1 Ground 12 V
Revision: 2010 May2011 QX56

Page 3219 of 5598

INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITHAC-113
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
3. Check continuity between front mode door motor harness connector and

Page 3220 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-114
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION

Page 3221 of 5598

INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITHAC-115
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Is the inspection result normal?
YES >> Replace rear air mix door motor

POWER SUPPLY AND GROUND CIRCUITHAC-115
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Is the inspection result normal?
YES >> Replace rear air mix door motor. Refer to HAC-154, "REAR AIR MIX DOOR MOTOR : Removal
and Installation".
NO >> Repair or replace malfunctioning part.
4.CHECK REAR AIR MIX DOOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear air mix door motor connector and A/C auto amp. connector.
3. Check continuity between rear air mix door mo tor harness connector and A/C auto amp. harness connec-
tor.
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Repair harness or connector.
REAR A/C CONTROL
REAR A/C CONTROL : Diagnosis ProcedureINFOID:0000000006275954
1.CHECK FUSE
Check 10A fuse [No. 4, locat ed in the fuse block (J/B)].
NOTE:
Refer to PG-140, "
Fuse, Connector and Terminal Arrangement".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK REAR A/C CONTROL POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect rear A/C control connector.
3. Turn ignition switch ON.
4. Check voltage between rear A/C control harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector between r ear A/C control and fuse block (J/B).
3.CHECK REAR A/C CONTROL GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear A/ C control harness connector and ground.
Is the inspection result normal?
YES >> Replace rear A/C control. Refer to HAC-146, "Removal and Installation".
NO >> Repair harness or connector.
Rear air mix door motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
B210 1 M50 17 Existed
+ −Voltage
Rear A/C control
Connector Terminal M41 12 Ground Battery voltage
Rear A/C control —Continuity
Connector Terminal
M41 1 Ground Existed
Revision: 2010 May2011 QX56

Page 3222 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-116
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
REAR MODE DOOR MOTOR
REAR MODE DOOR MOTOR : Diagnosis ProcedureINFOID:0000000006275955
1.CHECK REAR MODE

Page 3223 of 5598

INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITHAC-117
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
2. Check voltage between upper ventilator door motor harness connector

Page 3224 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-118
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
DOOR MOTOR
DOOR MOTOR
Diagnosis ProcedureINFOID:0000000006275966
1.CHECK EACH DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Chec

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