Infiniti G37 Coupe. Manual - part 770

 

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Infiniti G37 Coupe. Manual - part 770

 

 

MODE DOOR MOTOR

HAC-69

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is it operated normally?

YES

>> END.

NO

>> GO TO 7.

7.

CHECK MODE DOOR CONTROL LINKAGE

Check mode door control linkage.
Is it installed normally?

YES

>> Refer to 

VTL-38, "Exploded View"

.

NO

>> Repair or adjust control linkage.

HAC-70

< 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:0000000001675696

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:0000000001675697

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-70, "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:0000000001675698

1.

PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to 

HAC-42, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-

TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

, see Nos. 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-42, "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-42, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-

TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

, see Nos. 1 to 5.

Is it operated normally?

YES

>> END.

NO

>> GO TO 3.

3.

CHECK INSTALLATION OF AIR MIX DOOR MOTOR

Check installation of air mix door motor. Refer to 

VTL-40, "Exploded View"

.

:

Vehicle front

JSIIA0139ZZ

AIR MIX DOOR MOTOR

HAC-71

< 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

>> Repair or replace air mix door motor.

4.

CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR

Check voltage between air mix door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK SIGNAL FOR AIR MIX DOOR MOTOR

Confirm A/C LAN signal between air mix door motor harness connector and ground using an oscilloscope.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

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 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:0000000001675699

COMPONENT DESCRIPTION

Air Mix Door Motor

(+)

(

)

Voltage

Air mix door motor

Connector

Terminal

M255

1

Ground

Battery voltage

(+)

(

)

Voltage

Air mix door motor

Connector

Terminal

M255

3

Ground

SJIA1453J

Air mix door motor

Continuity

Connector

Terminal

M255

2

Ground

Existed

HAC-72

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

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:0000000001675700

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-72, "WITH LEFT AND RIGHT VENTILATION TEMPER-

ATURE SEPARATELY CONTROL SYSTEM : Diagnosis Procedure"

.

WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL 
SYSTEM : Diagnosis Procedure

INFOID:0000000001675701

1.

PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to 

HAC-48, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE

SEPARATELY CONTROL SYSTEM : Diagnosis Description"

, see Nos. 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-48, "WITH LEFT AND RIGHT VEN-

TILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

, see

No. 11.

2.

PERFORM SELF-DIAGNOSIS STEP-4

Perform self-diagnosis STEP-4. Refer to 

HAC-48, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE

SEPARATELY CONTROL SYSTEM : Diagnosis Description"

, see Nos. 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 7.

3.

CHECK INSTALLATION OF AIR MIX DOOR MOTOR (DRIVER SIDE)

:

Vehicle front

JSIIA0006GB

 

 

 

 

 

 

 

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