Infiniti G35 (V35) Sedan. Manual — part 775
HAC-72
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR MIX DOOR MOTOR
AIR MIX DOOR MOTOR
WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY
CONTROL SYSTEM
WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM : Description
INFOID:0000000000959931
COMPONENT DESCRIPTION
Air Mix Door Motor
The air mix door motor (1) is attached to the heater & cooling unit
assembly. It rotates so that the air mix door is opened or closed to a
position set by the unified meter and A/C amp. Motor rotation is then
conveyed through a shaft and the air mix door position feedback is
then sent to the unified meter and A/C amp. by PBR built-in air mix
door motor.
WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM : Component Function Check
INFOID:0000000000959932
1.
CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK
1.
Turn temperature control dial clockwise until 32
°
C (90
°
F) is displayed.
2.
Check for hot air at discharge air outlets.
3.
Turn temperature control dial counterclockwise until 18
°
C (60
°
F) is displayed.
4.
Check for cold air at discharge air outlets.
Is the inspection result normal?
YES
>> END.
NO
>> Go to diagnosis procedure. Refer to
HAC-72, "WITHOUT LEFT AND RIGHT VENTILATION TEM-
PERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Procedure"
WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM : Diagnosis Procedure
INFOID:0000000000959933
1.
PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to
HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-
TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
, see No. 1 to 2.
Does code No. 20 appear on the display.
YES
>> GO TO 2.
NO
>> Go to appropriate malfunctioning sensor circuit. Refer to
HAC-44, "WITHOUT LEFT AND RIGHT
VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
,
see No. 11.
2.
PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to
HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-
TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
, see No. 1 to 5.
Is it operated normally?
YES
>> END.
NO
>> GO TO 3.
3.
CHECK AIR MIX DOOR MOTOR
Check air mix door motor. Refer to
:
Vehicle front
JSIIA0139ZZ
AIR MIX DOOR MOTOR
HAC-73
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is it installed normally?
YES
>> GO TO 4.
NO
>> Replace air mix door motor.
4.
CHECK POWER SUPPLY FOR UNIFIED METER AND A/C AMP.
1.
Turn ignition switch ON.
2.
Check voltage between unified meter and A/C amp. harness connector M67 terminal 70 and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace unified meter and A/C amp.
5.
CHECK SIGNAL FOR UNIFIED METER AND A/C AMP.
Confirm A/C LAN signal between unified meter and A/C amp. harness connector M67 terminal 69 and ground
using an oscilloscope.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace unified meter and A/C amp.
6.
CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR
Check voltage between air mix door motor harness connector M255 terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair harness or connector.
7.
CHECK SIGNAL FOR AIR MIX DOOR MOTOR
Confirm A/C LAN signal between air mix door motor harness connector M255 terminal 3 and ground using an
oscilloscope.
(+)
(
−
)
Voltage
Unified meter and A/C amp.
—
Connector
Terminal
M67
70
Ground
Battery voltage
(+)
(
−
)
Voltage
Unified meter and A/C amp.
—
Connector
Terminal
M67
69
Ground
SJIA1453J
(+)
(
−
)
Voltage
Air mix door motor
—
Connector
Terminal
M255
1
Ground
Battery voltage
HAC-74
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR MIX DOOR MOTOR
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
8.
CHECK AIR MIX DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect air mix door motor connector.
3.
Check continuity between air mix door motor harness connector M255 terminal 2 and ground.
Is the inspection result normal?
YES
>> Replace air mix door motor.
NO
>> Repair harness or connector.
WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM
WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL
SYSTEM : Description
INFOID:0000000000959934
COMPONENT DESCRIPTION
Air Mix Door Motor
(+)
(
−
)
Voltage
Air mix door motor
—
Connector
Terminal
M255
3
Ground
SJIA1453J
(+)
(
−
)
Continuity
Air mix door motor
—
Connector
Terminal
M255
2
Ground
Continuity should exist
AIR MIX DOOR MOTOR
HAC-75
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
The air mix door motors (1) are attached to the heater & cooling unit
assembly. It rotates so that the air mix door is opened or closed to a
position set by the unified meter and A/C amp. Motor rotation is then
conveyed through a shaft and the air mix door position feedback is
then sent to the unified meter and A/C amp. by PBR built-in air mix
door motor.
WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL
SYSTEM : Component Function Check
INFOID:0000000000959935
1.
CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK
1.
Turn temperature control dial (driver side) clockwise until 32
°
C (90
°
F) is displayed.
2.
Check for hot air at discharge air outlets.
3.
Turn temperature control dial (driver side) counterclockwise until 18
°
C (60
°
F) is displayed.
4.
Check for cold air at discharge air outlets.
Is the inspection result normal?
YES
>> END.
NO
>> Go to diagnosis procedure. Refer to
HAC-75, "WITH LEFT AND RIGHT VENTILATION TEMPER-
ATURE SEPARATELY CONTROL SYSTEM : Diagnosis Procedure"
WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL
SYSTEM : Diagnosis Procedure
INFOID:0000000000959936
1.
PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to
HAC-50, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE
SEPARATELY CONTROL SYSTEM : Diagnosis Description"
, see No. 1 to 2.
Does code No. 20 appear on the display?
YES
>> GO TO 2.
NO
>> Go to appropriate malfunctioning sensor circuit. Refer to
HAC-50, "WITH LEFT AND RIGHT VEN-
TILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
No. 11.
2.
PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to
HAC-50, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE
SEPARATELY CONTROL SYSTEM : Diagnosis Description"
, see No.1 to 5.
Is it operated normally?
YES
>> END.
NO-1
>> Malfunction is detected on driver seat side. GO TO 3.
NO-2
>> Malfunction is detected on passenger seat side. GO TO 9
3.
CHECK AIR MIX DOOR MOTOR (DRIVER SIDE)
:
Vehicle front
JSIIA0006GB
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