Infiniti QX56 (JA60). Manual — part 594
![](/vehicles/zatt/vend/genn/ier.png)
AIR MIX DOOR MOTOR
HAC-33
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
4.
CHECK AIR MIX DOOR MOTOR (DRIVER) CIRCUITS FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector.
3. Check continuity between A/C auto amp. harness connector
M49 terminal 17 and terminal 18.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK AIR MIX DOOR MOTOR (DRIVER) CIRCUITS FOR OPEN
1. Disconnect the air mix door motor (driver) harness connector.
2. Check continuity between A/C auto amp. harness connector
M49 (A) terminal 17, 18 and the air mix door motor (driver) har-
ness connector M147 (B) terminal 1, 6.
Is the inspection result normal?
YES
>> Replace air mix door motor (driver). Refer to
.
NO
>> Repair or replace harness as necessary.
6.
CHECK A/C AUTO AMP. FOR PBR POWER AND GROUND
1. Reconnect A/C auto amp. harness connector.
2. Turn ignition switch ON.
3. Check voltage between A/C auto amp. harness connector M50
(A) terminal 28 and M49 (B) terminal 3.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 7.
7.
CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO GROUND
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 28 and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
NO
>> Repair or replace harness as necessary.
8.
CHECK PBR REFERENCE VOLTAGE AND GROUND CIRCUITS
Continuity should exist.
AWIIA0116ZZ
17 - 1
: Continuity should exist.
18 - 6
: Continuity should exist.
AWIIA0117ZZ
Connector
Terminals
Voltage (Ap-
prox.)
(+)
(-)
A/C auto amp.: M50, M49
28
3
5V
AWIIA0118ZZ
Continuity should not exist.
AWIIA0119ZZ
![](/vehicles/zatt/vend/genn/heh.png)
HAC-34
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR MIX DOOR MOTOR
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 (A) terminal 28 and M49 (B) terminal 3.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 9.
9.
CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR OPEN
1. Disconnect the air mix door motor (driver) harness connector.
2. Check continuity between air mix door motor (driver) harness
connector M147 (B) terminal 3, 2 and A/C auto amp. harness
connector M49 (C) terminal 3 and M50 (A) terminal 28.
Is the inspection result normal?
YES
>> Replace air mix door motor (driver). Refer to
.
NO
>> Repair or replace harness as necessary.
10.
CHECK PBR FEEDBACK VOLTAGE
1. Reconnect the A/C auto amp. harness connector.
2. Turn ignition switch ON.
3. Check voltage between A/C auto amp. harness connector M49
terminal 6 and ground while rotating temperature control dial
from 32
°C (90°F) to 18°C (60°F).
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> GO TO 11.
11.
CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. harness connector.
3. Check continuity between A/C auto amp. harness connector
M49 terminal 6 and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
NO
>> Repair or replace harness as necessary.
12.
CHECK PBR FEEDBACK CIRCUIT FOR OPEN
Continuity should exist.
AWIIA0120ZZ
28 - 3
: Continuity should exist.
3 - 2
: Continuity should exist.
AWIIA0121ZZ
Voltage
: Approx. .5V - 4.5V
AWIIA0122ZZ
Continuity should not exist.
AWIIA0123ZZ
![](/vehicles/zatt/vend/genn/gooung.png)
AIR MIX DOOR MOTOR
HAC-35
< 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 air mix door motor (driver) harness connector
and A/C auto amp. harness connector.
3. Check continuity between air mix door motor (driver) harness
connector M147 (B) terminal 4 and A/C auto amp. harness con-
nector M49 (A) terminal 6.
Is the inspection result normal?
YES
>> Replace air mix door motor (driver). Refer to
.
NO
>> Repair or replace harness as necessary.
Air Mix Door Motor (Passenger) Component Function Check
INFOID:0000000005272349
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE
1. Turn the temperature control dial (passenger) clockwise until 32
°C (90°F) is displayed.
2. Check for hot air at discharge air outlets.
>> GO TO 2.
2.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn the temperature control dial (passenger) counterclockwise until 18
°C (60°F) is displayed.
2. Check for cold air at discharge air outlets.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-35, "Air Mix Door Motor (Passenger) Diagnosis Proce-
.
Air Mix Door Motor (Passenger) Diagnosis Procedure
INFOID:0000000005147693
Regarding Wiring Diagram information, refer to
SYMPTOM:
• Discharge air temperature does not change.
• Air mix door motor does not operate.
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (PASSENGER)
1.
CHECK A/C AUTO AMP. FOR POWER AND GROUND
1. Turn ignition switch ON.
2. Rotate temperature control dial (passenger) to 32
°C (90°F).
3. Check voltage between A/C auto amp. harness connector M49
terminal 14 and terminal 2 while rotating temperature control dial
(passenger) to 18
° C (60°F).
Is the inspection result normal?
OK
>> GO TO 3.
Continuity should exist.
AWIIA0124ZZ
Connector
Terminals
Condition
Voltage
(Approx.)
(+) (-)
A/C auto amp.:
M49
2 14
Rotate temp
control dial
Battery
voltage
AWIIA0125ZZ
![](/vehicles/zatt/vend/genn/xmo.png)
HAC-36
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR MIX DOOR MOTOR
NG
>> GO TO 2.
2.
CHECK AIR MIX DOOR MOTOR (PASSENGER) CIRCUITS FOR SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector.
3. Check continuity between A/C auto amp. harness connector
M49 terminal 14, 2 and ground.
Is the inspection result normal?
YES >> Replace A/C auto amp. Refer to
NO
>> Repair or replace harness as necessary.
3.
CHECK A/C AUTO AMP. FOR POWER AND GROUND
1. Turn ignition switch ON.
2. Rotate temperature control dial (passenger) to 18
°C (60°F).
3. Check voltage between A/C auto amp. harness connector M49
terminal 14 and terminal 2 while rotating temperature control dial
(passenger) to 32
°C (90°F).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace A/C auto amp. Refer to
VTL-7, "Removal and Installation"
4.
CHECK AIR MIX DOOR MOTOR (PASSENGER) CIRCUITS FOR OPEN
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 14 and terminal 2.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK AIR MIX DOOR MOTOR (PASSENGER) CIRCUITS FOR OPEN
1. Disconnect the air mix door motor (passenger) harness connec-
tor.
2. Check continuity between A/C auto amp. harness connector
M49 (A) terminal 14, 2 and the air mix door motor (passenger)
harness connector M143 (B) terminal 1, 6.
Is the inspection result normal?
YES
>> Replace air mix door motor (passenger). Refer to
31, "Removal and Installation"
.
NO
>> Repair or replace harness as necessary.
14 - Ground
: Continuity should not exist.
2 - Ground
: Continuity should not exist.
AWIIA0126ZZ
Connector
Terminals
Condition
Voltage
(Approx.)
(+) (-)
A/C auto amp.:
M49
14 2
Rotate temp
control dial
Battery
voltage
AWIIA0127ZZ
Continuity should exist.
AWIIA0128ZZ
14 - 1
: Continuity should exist.
2 - 6
: Continuity should exist.
AWIIA0129ZZ
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