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-
.
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-
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
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
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
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст