Infiniti FX35, FX50 (S51). Manual - part 1169

AIR MIX DOOR MOTOR (DRIVER SIDE)

HAC-73

< DTC/CIRCUIT 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 4.

NO

>> Repair harness or connector.

4.

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 and ground.

Is the inspection result normal?

YES

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

NO

>> Repair harness or connector.

5.

CHECK INSTALLATION OF AIR MIX DOOR MOTOR (DRIVER SIDE)

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

HAC-187, "Exploded View"

.

Is it installed normally?

YES

>> INSPECTION END

NO

>> Repair or replace air mix door motor (driver side).

(+)

(

−

)

Voltage

Air mix door motor (driver side)

—

Connector

Terminal

M252

3

Ground

SJIA1453J

Air mix door motor (driver side)

—

Continuity

Connector

Terminal

M252

2

Ground

Existed

HAC-74

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR (PASSENGER SIDE)

AIR MIX DOOR MOTOR (PASSENGER SIDE)

Description

INFOID:0000000005246257

COMPONENT DESCRIPTION

Air Mix Door Motor

The air mix door motor (passenger side) (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 posi-
tion feedback is then sent to the unified meter and A/C amp. by PBR
built-in air mix door motor.

Component Function Check

INFOID:0000000005246258

1.

CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1.

Turn temperature control dial (passenger side) clockwise until 32.0

°

C (90

°

F) is displayed.

2.

Check for warm air at discharge air outlets.

3.

Turn temperature control dial (passenger side) counterclockwise until 18.0

°

C (60

°

F) is displayed.

4.

Check for cool air at discharge air outlets.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to diagnosis procedure. Refer to 

HAC-74, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005246259

1.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis function. Refer to 

HAC-57, "WITHOUT ACCS : Diagnosis Description"

 (WITHOUT

ACCS) or 

HAC-62, "WITH ACCS : Diagnosis Description"

 (WITH ACCS).

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

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

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

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

:

Vehicle front

JSIIA0139ZZ

(+)

(

−

)

Voltage

(Approx.)

Air mix door motor (passenger side)

—

Connector

Terminal

M255

1

Ground

12 V

AIR MIX DOOR MOTOR (PASSENGER SIDE)

HAC-75

< DTC/CIRCUIT 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 4.

NO

>> Repair harness or connector.

4.

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 and ground.

Is the inspection result normal?

YES

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

NO

>> Repair harness or connector.

5.

CHECK INSTALLATION OF AIR MIX DOOR MOTOR (PASSENGER SIDE)

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

HAC-187, "Exploded View"

.

Is it installed normally?

YES

>> INSPECTION END 

NO

>> Repair or replace air mix door motor (passenger side).

(+)

(

−

)

Voltage

Air mix door motor (passenger side)

—

Connector

Terminal

M255

3

Ground

SJIA1453J

Air mix door motor (passenger side)

—

Continuity

Connector

Terminal

M255

2

Ground

Existed

HAC-76

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INTAKE DOOR MOTOR

INTAKE DOOR MOTOR

WITHOUT ACCS

WITHOUT ACCS : Description

INFOID:0000000005246260

COMPONENT DESCRIPTION

Intake Door Motor

The intake door motor (1) is attached to the blower unit. It rotates so
that air is drawn from inlets set by the unified meter and A/C amp.
Motor rotation is conveyed to a lever which activates the intake door.

WITHOUT ACCS : Component Function Check

INFOID:0000000005246261

1.

CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1.

Press intake switch.

2.

REC indicator turns ON.

3.

Listen for intake door position change (Slight change of blower sound can be heard.).

4.

Press intake switch again.

5.

FRE indicator turns ON.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to diagnosis procedure. Refer to 

HAC-76, "WITHOUT ACCS : Diagnosis Procedure"

.

WITHOUT ACCS : Diagnosis Procedure

INFOID:0000000005246262

1.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis function. Refer to 

HAC-57, "WITHOUT ACCS : Diagnosis Description"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR

Check voltage between intake door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK SIGNAL FOR INTAKE DOOR MOTOR

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

:

Vehicle front

JSIIA0007GB

(+)

(

−

)

Voltage

(Approx.)

Intake door motor

—

Connector

Terminal

M254

1

Ground

12 V