Infiniti QX56 (Z62). Manual — part 381
DEF-34
< DTC/CIRCUIT DIAGNOSIS >
WIPER DEICER
WIPER DEICER
Component Function Check
INFOID:0000000006299454
1.
CHECK WIPER DEICER
1.
Select Active Test (“REAR DEFOGGER”) mode of “BCM” using CONSULT-III.
2.
Touch “ON”.
3.
Check that the front window heating wire is getting warmer.
Is the inspection result normal?
YES
>> Wiper deicer is OK.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000006299455
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check 15 A fuse [No.75, located in fuse block (J/B)]
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.
CHECK POWER SUPPLY CIRCUIT
1.
Turn ignition switch ON.
2.
Check voltage between wiper deicer harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 4.
3.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect wiper deicer connector.
3.
Check continuity between wiper deicer harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness between rear window defogger and ground.
4.
CHECK WIPER DEICER CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect wiper deicer relay connector and wiper deicer connector.
3.
Check continuity between wiper deicer relay harness connector and wiper deicer harness connector.
(+)
(–)
Condition
Voltage (V)
(Approx.)
Wiper deicer
Connector
Terminal
E40
1
Ground
Rear window defogger switch: ON
Battery voltage
Rear window defogger switch: OFF
0
Wiper deicer
Ground
Continuity
Connector
Terminal
E40
2
Existed
WIPER DEICER
DEF-35
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
M
A
B
DEF
N
O
P
4.
Check continuity between wiper deicer relay harness connector and ground.
Is the inspection result normal?
YES
>> Repair or replace harness between wiper deicer relay and fuse.
NO
>> Repair or replace harness between wiper deicer relay and wiper deicer.
5.
CHECK WIPER DEICER
Check wiper deicer.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace windshield glass.
6.
CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to
GI-40, "Intermittent Incident"
.
>> INSPECTION END
Wiper deicer relay
Wiper deicer
Continuity
Connector
Terminal
Connector
Terminal
E23
5
E40
1
Existed
Wiper deicer relay
Ground
Continuity
Connector
Terminal
E23
5
Not existed
Wiper deicer
Continuity
Connector
Terminal
E40
1
2
Existed
DEF-36
< SYMPTOM DIAGNOSIS >
REAR WINDOW DEFOGGER DOES NOT OPERATE
SYMPTOM DIAGNOSIS
REAR WINDOW DEFOGGER DOES NOT OPERATE
Diagnosis Procedure
INFOID:0000000006299456
1.
CHECK REAR WINDOW DEFOGGER SWITCH
Check rear window defogger switch.
Refer to
DEF-25, "Component Function Check"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace the malfunctioning parts.
2.
CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay.
Refer to
DEF-26, "Component Function Check"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace the malfunctioning parts.
3.
CHECK REAR WINDOW DEFOGGER
Check rear window defogger.
Refer to
DEF-27, "Component Function Check"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the malfunctioning parts.
4.
CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-40, "Intermittent Incident"
.
NO
>> GO TO 1.
REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER DO NOT OPER-
ATE.
DEF-37
< SYMPTOM DIAGNOSIS >
C
D
E
F
G
H
I
J
K
M
A
B
DEF
N
O
P
REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER DO NOT
OPERATE.
Diagnosis Procedure
INFOID:0000000006299457
1.
CHECK REAR WINDOW DEFOGGER SWITCH
Check rear window defogger switch.
Refer to
DEF-25, "Component Function Check"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace the malfunctioning parts.
2.
CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay.
Refer to
DEF-26, "Component Function Check"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace the malfunctioning parts.
3.
CHECK REAR WINDOW DEFOGGER
Check rear window defogger.
Refer to
DEF-27, "Component Function Check"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the malfunctioning parts.
4.
CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-40, "Intermittent Incident"
.
NO
>> GO TO 1.
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