Infiniti QX56 (JA60). Manual - part 595

 

  Index      Infiniti     Infiniti QX56 (JA60) - service repair manual 2010 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  593  594  595  596   ..

 

 

Infiniti QX56 (JA60). Manual - part 595

 

 

AIR MIX DOOR MOTOR

HAC-37

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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

M49 terminal 29 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

8.

CHECK PBR REFERENCE VOLTAGE AND GROUND CIRCUITS

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 (passenger) harness connec-

tor.

2. Check continuity between air mix door motor (passenger) har-

ness connector M143 (B) terminal 3, 2 and A/C auto amp. har-

ness connector M49 (C) terminal 3 and M50 (A) terminal 28.

Is the inspection result normal?

YES

>> Replace air mix door motor (passenger). Refer to 

VTL-

31, "Removal and Installation"

 .

NO

>> Repair or replace harness as necessary.

10.

CHECK PBR FEEDBACK VOLTAGE

Connector

Terminals

Voltage (Ap-

prox.)

(+)

(-)

A/C auto amp.: M49

28 

3

5V

AWIIA0099ZZ

Continuity should not exist.

AWIIA0241ZZ

Continuity should exist.

AWIIA0101ZZ

28 - 3

: Continuity should exist.

3 - 2

: Continuity should exist.

AWIIA0121ZZ

HAC-38

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR MIX DOOR MOTOR

1. Reconnect the A/C auto amp. harness connector.

2. Turn ignition switch ON.

3. Check voltage between A/C auto amp. harness connector M50

terminal 29 and ground while rotating temperature control dial

(passenger) from 32

°C (90°F) to 18° (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

M50 terminal 29 and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair or replace harness as necessary.

12.

CHECK PBR FEEDBACK CIRCUIT FOR OPEN

1. Turn ignition switch OFF.

2. Disconnect the air mix door motor (passenger) harness connec-

tor and A/C auto amp. harness connector.

3. Check continuity between air mix door motor (passenger) har-

ness connector M143 (B) terminal 4 and A/C auto amp. harness

connector M50 (A) terminal 29.

Is the inspection result normal?

YES

>> Replace air mix door motor (passenger). Refer to 

VTL-

31, "Removal and Installation"

.

NO

>> Repair or replace harness as necessary.

 Voltage

: Approx. .5V - 4.5V

AWIIA0131ZZ

Continuity should not exist.

AWIIA0132ZZ

Continuity should exist.

AWIIA0133ZZ

INTAKE DOOR MOTOR

HAC-39

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

INTAKE DOOR MOTOR

System Description

INFOID:0000000005147694

SYSTEM DESCRIPTION

SYMTOM:

• Intake door motor does not operate normally.

• Intake door does not change.

SYSTEM DESCRIPTION

Component Parts

Intake door control system components are:

• A/C auto amp.

• A/C and AV switch assembly

• Intake door motor (PRB built into the intake door motor)

• In-vehicle sensor

• Ambient sensor

• Optical sensor

• Intake sensor

System Operation

The intake door control determines the intake door position based on the position of the recirculation switch.

When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and

recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the

opposite direction, again allowing fresh air into the cabin.

In the AUTO mode, the A/C auto amp. determines the intake door position based on the ambient temperature,

the intake air temperature and the in-vehicle temperature. When the DEF, D/F, FLOOR or OFF switches are

pushed, the A/C auto amp. sets the intake door at the fresh position.

Intake Door Control Specification

AWIIA0144GB

AWIIA0145GB

HAC-40

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INTAKE DOOR MOTOR

COMPONENT DESCRIPTION

Intake door motor

The intake door motor is attached to the intake unit. It rotates so that

air is drawn from inlets set by the A/C auto amp. Motor rotation is

conveyed to a lever which activates the intake door.

Intake Door Motor Component Function Check

INFOID:0000000005147695

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC (

)

1. Press the mode switch to vent mode(

).

2. Press REC (

) switch. The REC (

) indicator should illuminate.

3. Press REC (

) switch again. The REC (

) indicator should go out.

4. Listen for intake door position change (you should hear blower sound change slightly).
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-40, "Intake Door Motor Diagnosis Procedure"

.

Intake Door Motor Diagnosis Procedure

INFOID:0000000005147696

Regarding Wiring Diagram information, refer to 

HAC-91, "Wiring Diagram"

.

SYMPTOM:

• Intake door does not change.

• Intake door motor does not operate normally.

DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR

1.

CHECK A/C AUTO AMP. FOR POWER AND GROUND 

1. Turn ignition switch ON.

2. Check voltage between A/C auto amp. harness connector M49

terminal 21 and terminal 22 while placing the HVAC system into

self-diagnostic mode.

Is the inspection result normal?

OK

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK INTAKE DOOR MOTOR CIRCUITS FOR SHORT TO GROUND 

WJIA0552E

Connector

Terminals

Condition 

Voltage 

(Approx.)

(+) (-)

A/C auto amp.: 

M49

21

22

Self-diagnostic 

mode

Battery volt-

age

AWIIA0146ZZ

 

 

 

 

 

 

 

Content   ..  593  594  595  596   ..