Infiniti QX56 (JA60). Manual — part 603
MAGNET CLUTCH
HAC-69
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.
CHECK INTAKE AND AMBIENT SENSOR CIRCUITS
Check intake and ambient sensors. Refer to
HAC-23, "A/C and AV Switch Assembly Self-Diagnosis"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> • Malfunctioning intake sensor. Refer to
HAC-83, "Intake Sensor Diagnosis Procedure"
.
• Malfunctioning ambient sensor. Refer to
HAC-75, "Ambient Sensor Diagnosis Procedure"
2.
PERFORM AUTO ACTIVE TEST
PCS-14, "CONSULT - III Function (IPDM E/R)"
.
Does magnet clutch operate?
YES
>> •
WITH CONSULT-III
GO TO 5.
•
WITHOUT CONSULT-III
GO TO 6.
NO
>> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 3.
3.
CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and compressor (magnet
clutch) connector.
3. Check continuity between IPDM E/R harness connector E119
terminal 11 and A/C compressor harness connector F3 terminal
1.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK MAGNET CLUTCH CIRCUIT
AWIIA1070GB
11 – 1
: Continuity should exist.
WJIA0560E
HAC-70
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
MAGNET CLUTCH
Check for operation sound when applying battery voltage direct cur-
rent to terminal.
Is the inspection result normal?
YES
.
NO
>> Replace magnet clutch. Refer to
Installation for Compressor Clutch"
.
5.
CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
Check compressor ON/OFF signal. Refer to
HAC-20, "CONSULT-III Function (HVAC)"
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 6.
6.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND A/C AUTO AMP.
1. Turn ignition switch OFF.
2. Disconnect BCM connector and A/C auto amp. connector.
3. Check continuity between BCM harness connector M18 (A) ter-
minal 27 and A/C auto amp. harness connector M49 (B) terminal
4.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair harness or connector.
7.
CHECK VOLTAGE FOR A/C AUTO AMP. (A/C COMPRESSOR ON SIGNAL)
1. Reconnect BCM connector and A/C auto amp. connector.
2. Turn ignition switch ON.
3. Check voltage between A/C auto amp. harness connector M49
terminal 4 and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO-1 >> If the voltage is approx. 5V when A/C switch is ON, replace A/C auto amp. Refer to
.
NO-2 >> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer to
.
8.
CHECK REFRIGERANT PRESSURE SENSOR
1. Start engine.
SJIA0197E
A/C SW ON
: COMP ON SIG ON
A/C SW OFF
: COMP ON SIG OFF
27 - 4
Continuity should exist.
AWIIA0199ZZ
Terminals
Condition
Voltage
(+)
(-)
A/C auto
amp. con-
nector
Terminal No.
M49
4
Ground
A/C switch: ON
Approx. 0V
A/C switch: OFF
Approx. 5V
AWIIA0200ZZ
MAGNET CLUTCH
HAC-71
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
2. Check voltage between ECM harness connector F54 terminal
70 and ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Refer to
.
9.
CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to
HAC-20, "CONSULT-III Function (HVAC)"
.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> GO TO 10.
10.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND A/C AUTO AMP.
1. Turn ignition switch OFF.
2. Disconnect BCM connector and A/C auto amp. connector.
3. Check continuity between BCM harness connector M18 (A) ter-
minal 28 and A/C auto amp. harness connector M49 (B) terminal
5.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Repair harness or connector.
11.
CHECK VOLTAGE FOR A/C AUTO AMP. (FAN ON SIGNAL)
1. Reconnect BCM connector and A/C auto amp. connector.
2. Turn ignition switch ON.
3. Check voltage between A/C auto amp. harness connector M49
terminal 5 and ground.
Is the inspection result normal?
YES
>> GO TO 12.
NO-1 >> If the voltage is approx. 5V when blower motor is ON, replace A/C auto amp. Refer to
.
Terminals
Condition
Voltage
(+)
(-)
ECM con-
nector
Terminal No.
F54
70
Ground
A/C switch: ON
Approx. 0.36 - 3.88V
LJIA0124E
FRONT BLOWER CONTROL
DIAL ON
: FAN ON SIG ON
FRONT BLOWER CONTROL
DIAL OFF
: FAN ON SIG OFF
28 - 5
Continuity should exist.
AWIIA0201ZZ
Terminals
Condition
Voltage
(+)
(-)
A/C auto amp.
connector
Terminal No.
M49
5
Ground
A/C switch: ON
Blower motor
operates
Approx. 0V
A/C switch: OFF
Approx. 5V
AWIIA0202ZZ
HAC-72
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
MAGNET CLUTCH
NO-2 >> If the voltage is approx. 0V when blower motor is OFF, replace BCM. Refer to
.
12.
CHECK CAN COMMUNICATION
Check CAN communication. Refer to
• BCM – ECM
• ECM – IPDM E/R
• ECM – A/C auto amp.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace malfunctioning part(s).
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст