Infiniti QX56 (Z62). Manual — part 806
POWER SUPPLY AND GROUND CIRCUIT
HAC-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
.
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 motor 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 Procedure
INFOID:0000000006275954
1.
CHECK FUSE
Check 10A fuse [No. 4, located 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 rear 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
HAC-116
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
REAR MODE DOOR MOTOR
REAR MODE DOOR MOTOR : Diagnosis Procedure
INFOID:0000000006275955
1.
CHECK REAR MODE DOOR MOTOR POWER SUPPLY
1.
Turn ignition switch ON.
2.
Check voltage between rear mode door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK REAR MODE DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear mode door motor connector.
3.
Check continuity between rear mode door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK INSTALLATION OF REAR MODE DOOR MOTOR CONTROL LINKAGE
Check rear mode door motor control linkage is properly installed. Refer to
.
Is the inspection result normal?
YES
>> Replace rear mode door motor. Refer to
HAC-154, "REAR MODE DOOR MOTOR : Removal and
NO
>> Repair or replace malfunctioning part.
4.
CHECK REAR MODE DOOR MOTOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear mode door motor connector and A/C auto amp. connector.
3.
Check continuity between rear mode door motor 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.
UPPER VENTILATOR DOOR MOTOR
UPPER VENTILATOR DOOR MOTOR : Diagnosis Procedure
INFOID:0000000006275956
1.
CHECK UPPER VENTILATOR DOOR MOTOR POWER SUPPLY
1.
Turn ignition switch ON.
+
−
Voltage
(Approx.)
Rear mode door motor
Connector
Terminal
B209
1
Ground
12 V
Rear mode door motor
—
Continuity
Connector
Terminal
B209
2
Ground
Existed
Rear mode door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
B209
1
M50
17
Existed
POWER SUPPLY AND GROUND CIRCUIT
HAC-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 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK UPPER VENTILATOR DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect upper ventilator door motor connector.
3.
Check continuity between upper ventilator door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK INSTALLATION OF UPPER VENTILATOR DOOR MOTOR
Check upper ventilator door motor is properly installed. Refer to
Is the inspection result normal?
YES
>> Replace upper ventilator door motor. Refer to
HAC-154, "UPPER VENTILATOR DOOR MOTOR :
.
NO
>> Repair or replace malfunctioning part.
4.
CHECK UPPER VENTILATOR DOOR MOTOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect upper ventilator door motor connector and A/C auto amp. connector.
3.
Check continuity between upper ventilator door motor 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.
+
−
Voltage
(Approx.)
Upper ventilator door motor
Connector
Terminal
M256
1
Ground
12 V
Upper ventilator door motor
—
Continuity
Connector
Terminal
M256
2
Ground
Existed
Upper ventilator door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M256
1
M50
17
Existed
HAC-118
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
DOOR MOTOR
DOOR MOTOR
Diagnosis Procedure
INFOID:0000000006275966
1.
CHECK EACH DOOR MOTOR POWER SUPPLY
1.
Turn ignition switch ON.
2.
Check voltage between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK EACH DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect intake door motor connector.
3.
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
3.
CHECK EACH DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN
1.
Disconnect A/C auto amp. connector.
2.
Check continuity between intake door motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK EACH DOOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT
1.
Disconnect following connectors.
-
Front air mix door motor LH
-
Front air mix door motor RH
-
Front mode door motor
-
Upper vent door motor
-
Rear air mix door motor
-
Rear mode door motor
2.
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal?
+
−
Voltage
(Approx.)
Intake door motor
Connector
Terminal
M254
1
Ground
12 V
Intake door motor
—
Continuity
Connector
Terminal
M254
2
Ground
Existed
Intake door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M254
1
M50
17
Existed
Intake door motor
—
Continuity
Connector
Terminal
M254
1
Ground
Not existed
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