Infiniti QX56 (JA60). Manual - part 599

 

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

 

Search            

 

 

 

 

 

 

 

  

 

Content   ..  597  598  599  600   ..

 

 

Infiniti QX56 (JA60). Manual - part 599

 

 

BLOWER MOTOR CONTROL SYSTEM

HAC-53

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Confirm smooth rotation of the blower motor.

• Ensure that there are no foreign particles inside the blower unit.

• Apply 12 volts to terminal 2 and ground to terminal 1 and verify that

the motor operates freely and quietly.

Rear Blower Motor Description

INFOID:0000000005147704

SYSTEM DESCRIPTION

Component Parts

Rear blower speed control system components are:

• A/C auto amp.

• A/C and AV switch assembly

• Rear air control (front)

• Rear air control (rear)

• Variable blower control (rear)

• Rear blower motor

• Rear blower motor relay

System Operation

Rear Blower Control

When the rear blower control dial (front) REAR CTRL switch is pressed (indicator on), it allows the rear air

control (rear) to control the rear blower motor speed. If the REAR CTRL switch is off (indicator off), the rear air

control (front) controls the rear blower motor speed regardless of the rear air control (rear) position.

Rear Blower Motor Component Function Check

INFOID:0000000005147705

INSPECTION FLOW 

SYMPTOM:

• Rear blower motor does not operate from the rear air control (front) and the rear air control (rear).

• Rear blower motor operates from rear air control (front) only.

• Rear blower motor operates in high at all times. 

INSPECTION FLOW

WJIA1508E

AWIIA0181GB

HAC-54

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR CONTROL SYSTEM

1.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 2.

2.

CONFIRM SYMPTOM BY PERFORMING REAR BLOWER MOTOR OPERATIONAL CHECK FROM REAR

AIR CONTROL (FRONT)
1. Turn ignition switch ON.

2. Turn the rear air control (front) blower control dial to the lowest speed and check for rear blower operation

(REAR CTRL indicator off).

3. Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?

YES

>> GO TO 3.

NO

>> Check the rear blower motor operation. Refer to 

HAC-53, "Rear Blower Motor Component Func-

tion Check"

.

3.

CONFIRM SYMPTOM BY PERFORMING REAR BLOWER MOTOR OPERATIONAL CHECK FROM

REAR AIR CONTROL (REAR)
1. Press the REAR CTRL switch (indicator on) on the rear air control (front) to send control of the rear blower

motor back the rear air control (rear).

2. Turn the rear air control (rear) blower control dial to the lowest speed and check for rear blower operation.

3. Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?

YES

>> GO TO 4.

NO

>> • Check the rear air control (rear). Refer to 

HAC-56, "Rear Air Control (Rear) Diagnosis Proce-

dure #2"

.

4.

RECHECK FOR ANY SYMPTOMS 

Perform a complete operational check for any symptoms. Refer to 

HAC-5, "Operational Check (Rear)"

.

Does another symptom exist?

YES

>> Refer to 

HAC-3, "How to Perform Trouble Diagnosis For Quick And Accurate Repair"

.  

NO

>> Inspection End.

Rear Air Control (Front) Diagnosis Procedure #1

INFOID:0000000005147706

Regarding Wiring Diagram information, refer to 

HAC-91, "Wiring Diagram"

.

REAR BLOWER MOTOR INOPERATIVE/ON AT ALL TIMES. 

1.

CHECK FUSES

Check 10A fuse [No. 19 (Located in the fuse block J/B)]. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 6.

2.

CHECK REAR AIR CONTROL (FRONT) POWER SUPPLY

Fuse is good.

BLOWER MOTOR CONTROL SYSTEM

HAC-55

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1. Disconnect rear air control (front) harness connector.

2. Turn ignition switch ON.

3. Check voltage between rear air control (front) harness connec-

tor R108 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK REAR AIR CONTROL (FRONT) LIN BUS VOLTAGE

Check voltage between rear air control (front) harness connector

R108 terminal 5 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK REAR AIR CONTROL (FRONT) GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between rear air control (front) harness con-

nector R108 terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 5. 

NO

>> Repair harness or connector.

5.

CHECK REAR AIR CONTROL (FRONT) LIN BUS CIRCUIT FOR OPEN

1. Disconnect A/C auto amp. connector.

2. Check continuity between A/C auto amp. harness connector

M50 (A) terminal 48 and rear air control (front) harness connec-

tor R108 (B) terminal 5.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

VTL-7, "Removal and

Installation"

.

NO

>> Repair harness or connector.

6.

REPLACE FUSE

1. Replace fuse.

2. Activate the rear blower motor.
Does the fuse blow?

YES

>> GO TO 7.

NO

>> Inspection End.

7.

CHECK REAR AIR CONTROL (FRONT) POWER SUPPLY CIRCUIT FOR SHORT

Battery voltage should exist.

AWIIA0182ZZ

Battery voltage should exist.

AWIIA0183ZZ

Continuity should exist.

AWIIA0184ZZ

Continuity should exist.

AWIIA0185ZZ

HAC-56

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR CONTROL SYSTEM

1. Turn ignition switch OFF.

2. Disconnect rear air control (front), (rear), and A/C auto amp.

connectors. 

3. Check continuity between rear air control (front) harness con-

nector R108 terminal 1 and ground.

Is the inspection result normal?

YES

>> Repair harness or connector for a short.

NO

>> System OK.

Rear Air Control (Rear) Diagnosis Procedure #2

INFOID:0000000005147707

Regarding Wiring Diagram information, refer to 

HAC-91, "Wiring Diagram"

.

REAR AIR CONTROL (REAR) INOPERATIVE 

1.

CHECK REAR AIR CONTROL (REAR) POWER SUPPLY

1. Disconnect rear air control (rear) harness connector.

2. Turn ignition switch ON.

3. Check voltage between rear air control (rear) harness connector

R209 terminal 1 and ground.

Is the inspection results normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK REAR AIR CONTROL (REAR) LIN BUS CIRCUIT

Check voltage between rear air control (rear) harness connector

R209 terminal 5 and ground.

Is the inspection results normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK REAR AIR CONTROL (REAR) GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between rear air control (rear) harness connec-

tor R209 terminal 6 and ground.

Is the inspection results normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK REAR AIR CONTROL (REAR) LIN BUS CIRCUIT FOR OPEN

1 - Ground

: Continuity should not exist.

AWIIA0186ZZ

Battery voltage should exist.

AWIIA0182ZZ

Battery voltage should exist.

AWIIA0183ZZ

Continuity should exist.

AWIIA0184ZZ

 

 

 

 

 

 

 

Content   ..  597  598  599  600   ..