Infiniti G35 (V35) Sedan. Manual - part 776

HAC-76

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

Check air mix door motor (driver side). Refer to 

VTL-40, "Exploded View"

.

Is it installed normally?

YES

>> GO TO 4.

NO

>> Replace air mix door motor (driver side).

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 (DRIVER SIDE)

Check voltage between air mix door motor (driver side) harness connector M252 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 (DRIVER SIDE)

Confirm A/C LAN signal between air mix door motor (driver side) harness connector M252 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 (driver side)

—

Connector

Terminal

M252

1

Ground

Battery voltage

AIR MIX DOOR MOTOR

HAC-77

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector.

8.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect air mix door motor (driver side) connector.

3.

Check continuity between air mix door motor (driver side) harness connector M252 terminal 2 and ground.

Is the inspection result normal?

YES

>> Replace air mix door motor (driver side).

NO

>> Repair harness or connector.

9.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE)

Check air mix door motor (passenger side). Refer to 

VTL-40, "Exploded View"

.

Is it installed normally?

YES

>> GO TO 10.

NO

>> Replace air mix door motor (passenger side).

10.

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 11.

NO

>> Replace unified meter and A/C amp.

11.

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.

(+)

(

−

)

Voltage

Air mix door motor (driver side)

—

Connector

Terminal

M252

3

Ground

SJIA1453J

(+)

(

−

)

Continuity

Air mix door motor (driver side)

—

Connector

Terminal

M252

2

Ground

Continuity should exist

(+)

(

−

)

Voltage

Unified meter and A/C amp.

—

Connector

Terminal

M67

70

Ground

Battery voltage

HAC-78

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Replace unified meter and A/C amp.

12.

CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

Check voltage between air mix door motor (passenger side) harness connector M255 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Repair harness or connector.

13.

CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

Confirm A/C LAN signal between air mix door motor (passenger side) harness connector M255 terminal 3 and
ground using an oscilloscope.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Repair harness or connector.

14.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect air mix door motor (passenger side) connector.

3.

Check continuity between air mix door motor (passenger side) harness connector M255 terminal 2 and
ground.

(+)

(

−

)

Voltage

Unified meter and A/C amp.

—

Connector

Terminal

M67

69

Ground

SJIA1453J

(+)

(

−

)

Voltage

Air mix door motor (passenger side)

—

Connector

Terminal

M255

1

Ground

Battery voltage

(+)

(

−

)

Voltage

Air mix door motor (passenger side)

—

Connector

Terminal

M255

3

Ground

SJIA1453J

AIR MIX DOOR MOTOR

HAC-79

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> Replace air mix door motor (passenger side).

NO

>> Repair harness or connector.

(+)

(

−

)

Continuity

Air mix door motor (passenger side)

—

Connector

Terminal

M255

2

Ground

Continuity should exist