Nissan Note E12. Manual — part 122
DEF-18
< DTC/CIRCUIT DIAGNOSIS >
REAR WINDOW DEFOGGER RELAY
REAR WINDOW DEFOGGER RELAY
Description
INFOID:0000000009477900
Power is supplied to the rear window defogger with BCM control.
Component Function Check
INFOID:0000000009477901
1.
CHECK FUNCTION
1. Turn ignition switch ON.
2. Check that an operation noise of rear window defogger relay can be heard when turning the rear window
defogger switch ON.
Is the inspection result normal?
YES
>> Rear window defogger relay function is OK.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000009477902
Regarding Wiring Diagram information, refer to
.
1.
CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF and disconnect rear window defogger relay connector.
2. Turn ignition switch ON.
3. Check voltage between rear window defogger relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse (No. 5).
Is the inspection result normal?
YES
>> Check ignition power supply circuit. Refer to
PG-22, "Wiring Diagram — Ignition Power Supply —
NO
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
3.
CHECK REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM harness connector and rear window defogger relay harness connector.
4. Check continuity between BCM harness connector and ground.
(+)
(
−)
Voltage (V)
(Approx.)
Rear window defogger relay
Connector
Terminal
M14
1
Ground
Battery voltage
BCM
Rear window defogger relay
Continuity
Connector
Terminal
Connector
Terminal
M18
1
M14
2
Yes
REAR WINDOW DEFOGGER RELAY
DEF-19
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
M
A
B
DEF
N
O
P
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace harness.
4.
CHECK REAR WINDOW DEFOGGER RELAY
DEF-19, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-67, "Removal and Installation"
NO
>> Replace rear window defogger relay.
Component Inspection
INFOID:0000000009477903
Check continuity between terminal 3 and 5.
BCM
Ground
Continuity
Connector
Terminal
M18
1
No
Terminal
Condition
Continuity
3 and 5
12 V direct current supply between terminal 1
and 2
Yes
No current supply
No
SEF497Y
DEF-20
< DTC/CIRCUIT DIAGNOSIS >
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
Description
INFOID:0000000009477904
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:0000000009477905
1.
CHECK REAR WINDOW DEFOGGER
Check that the heating wire of rear window defogger is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES
>> Rear window defogger is OK.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000009477906
Regarding Wiring Diagram information, refer to
.
1.
CHECK FUSES
Check if any of the following fuses in fuse block (J/B) are blown.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.
CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger relay connector and ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Check the following:
• Rear window defogger relay.
• Battery power supply circuit.
3.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger connector and ground.
COMPONENT PARTS
AMPERE
FUSE NO.
Fuse block (J/B)
20A
11
Terminals
Condition of rear
window defogger
switch
Voltage (V)
(Approx.)
(+)
(–)
Rear window
defogger relay
connector
Terminal
M14
5
Ground
ON Battery
voltage
OFF
0
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
DEF-21
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
M
A
B
DEF
N
O
P
Is the inspection result normal?
YES
>> GO TO 4
NO
>> GO TO 5
4.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Check continuity between rear window defogger connector and ground.
Is the inspection result normal?
YES
>> GO TO 6
NO
>> Repair or replace harness.
5.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear window defogger relay connector and condenser connector.
3. Check continuity between rear window defogger relay connector and condenser connector.
Is the inspection result normal?
YES
>> Replace condenser. Refer to
DEF-26, "Removal and Installation"
.
NO
>> Replace or repair harness.
6.
CHECK FILAMENT
Check filament.
DEF-21, "Component Inspection"
.
Is the inspection result normal?
YES
>> Refer to
GI-41, "Intermittent Incident"
.
NO
>> Repair filament. Refer to
DEF-24, "Inspection and Repair"
.
Component Inspection
INFOID:0000000009477907
1.
CHECK FILAMENT
Check the filament for damage or open circuits.
DEF-24, "Inspection and Repair"
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair filament. Refer to
DEF-24, "Inspection and Repair"
.
Terminals
Condition of rear
window
defogger switch
Voltage (V)
(Approx.)
(+)
(–)
Rear window
defogger
connector
Terminal
B50
1
Ground
ON
Battery voltage
OFF
0
Rear window defogger connector
Terminal
Ground
Continuity
B51
2
Yes
Rear window
defogger relay
connector
Terminal
Condenser connector
Terminal
Continuity
M14
5
B42
1
Yes
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