Infiniti G37 Coupe. Manual — part 347
DEF-12
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER RELAY
NO
>> Replace rear window defogger relay.
5.
CHECK FUSE BLOCK (J/B)
1.
Install the rear window defogger relay.
2.
Turn ignition switch ON.
3.
Check voltage between fuse block (J/B) (fuse block side) and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace fuse block (J/B).
6.
CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to
GI-38, "Intermittent Incident"
>> INSPECTION END.
Component Inspection
INFOID:0000000001696770
1.
CHECK REAR WINDOW DEFOGGER RELAY
1.
Turn ignition switch OFF.
2.
Disconnect rear window defogger relay.
3.
Check rear window defogger relay.
Is the inspection result normal?
YES
>> INSPECTION END.
NO
>> Replace rear window defogger relay.
Fuse block (J/B)
Ground
Voltage (V)
(Approx.)
Connector
Terminal
M2
4B
Ground
Battery voltage
Terminal
Condition
Continuity
Rear window
defogger relay
3
5
12 V direct current supply between termi-
nals 1 and 2.
Existed
No current supply
Not existed
SEF497Y
REAR WINDOW DEFOGGER
DEF-13
< COMPONENT DIAGNOSIS >
C
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A
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DEF
N
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REAR WINDOW DEFOGGER
Description
INFOID:0000000001696771
Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window
from fogging up.
Component Function Check
INFOID:0000000001696772
1.
CHECK REAR WINDOW DEFOGGER
1.
Perform Active Test (“REAR DEFOGGER”) with CONSULT-III.
2.
Touch “ON”.
3.
Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES
>> Rear window defogger is OK.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000001696773
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check the following.
-
20A fuse (No.14, located in fuse block (J/B))
-
20A fuse (No.15, 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 rear window defogger 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 rear window defogger connector.
3.
Check continuity between rear window defogger harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace harness between rear window defogger and ground.
4.
CHECK REAR WINDOW DEFOGGER CIRCUIT 1
1.
Turn ignition switch OFF.
2.
Disconnect condenser connector and rear window defogger connector.
Rear window defogger
Ground
Condition of rear window
defogger switch
Voltage (V)
(Approx.)
Connector
Terminal
B401
1
Ground
ON
Battery voltage
OFF
0
Rear window defogger
Ground
Continuity
Connector
Terminal
B402
2
Ground
Existed
DEF-14
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER
3.
Check continuity between condenser (condenser side) and rear window defogger harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace condenser. Refer to
DEF-63, "Removal and Installation"
5.
CHECK REAR WINDOW DEFOGGER CIRCUIT 2
1.
Check continuity between fuse block (J/B) harness connector and condenser harness connector.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace harness between fuse block (J/B) and condenser.
6.
CHECK FUSE BLOCK (J/B)
1.
Turn ignition switch ON.
2.
Check voltage between fuse block (J/B) (fuse block side) and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace fuse block (J/B).
7.
CHECK FILAMENT
Check filament.
Refer to
DEF-14, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair filament.
8.
CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to
GI-38, "Intermittent Incident"
>> INSPECTION END.
Component Inspection
INFOID:0000000001696774
1.
CHECK FILAMENT
Check the filament for damage or blown.
Refer to
DEF-61, "Inspection and Repair"
Is the inspection result normal?
Condenser
Rear window defogger
Continuity
Connector
Terminal
Connector
Terminal
B26
1
B401
1
Existed
Fuse block (J/B)
Condenser
Continuity
Connector
Terminal
Connector
Terminal
B6
10G
B26
1
Existed
11G
Fuse block (J/B)
Ground
Condition of rear window
defogger switch
Voltage (V)
(Approx.)
Connector
Terminal
B6
10G
Ground
ON
Battery voltage
OFF
0
11G
ON
Battery voltage
OFF
0
REAR WINDOW DEFOGGER
DEF-15
< COMPONENT DIAGNOSIS >
C
D
E
F
G
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K
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A
B
DEF
N
O
P
YES
>> INSPECTION END.
NO
>> Repair filament.
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