Nissan Xterra. Manual — part 181
REAR WINDOW DEFOGGER RELAY
DEF-9
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
M
A
B
DEF
N
O
P
REAR WINDOW DEFOGGER RELAY
Description
INFOID:0000000009484758
Power is supplied to the rear window defogger with BCM control.
Component Function Check
INFOID:0000000009484759
1.
CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
Check that an operation noise of rear window defogger relay (located in IPDM E/R) can be heard when turning
the rear window defogger switch ON.
Is the inspection result normal?
YES
>> Rear window defogger relay power supply circuit is OK.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000009484760
Regarding Wiring diagram information, refer to
1.
CHECK FUSES
Check if any of the following fuses in the IPDM E/R 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 RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R harness connector E124 ter-
minal 60 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace IPDM E/R. Refer to
PCS-27, "Removal and Installation"
.
3.
CHECK INTERMITTENT INCIDENT
Check for intermittent incident.
GI-40, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Check the following.
• Battery power supply circuit
• IPDM E/R
NO
>> Repair or replace the malfunctioning parts.
COMPONENT PARTS
AMPERE
FUSE NO.
IPDM E/R
15A
46
IPDM E/R
15A
47
Terminals
Condition of rear
window defogger
switch
Voltage (V)
(Approx.)
(+)
(–)
IPDM E/R con-
nector
Terminal
E124
60
Ground
ON Battery
voltage
OFF
0
LIIA2190E
DEF-10
< DTC/CIRCUIT DIAGNOSIS >
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
Description
INFOID:0000000009484761
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:0000000009484762
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:0000000009484763
Regarding Wiring diagram information, refer to
1.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger harness connec-
tor D651 terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> GO TO 3
2.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Check continuity between rear window defogger harness con-
nector D604 terminal 2 and ground.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Repair or replace harness.
3.
CHECK HARNESS CONTINUITY
Terminals
Condition of rear
window
defogger switch
Voltage (V)
(Approx.)
(+)
(–)
Rear window
defogger
connector
Terminal
D651
1
Ground
ON
Battery voltage
OFF
0
ALLIA0177ZZ
Rear window defogger connector
Terminal
Ground
Continuity
D604
2
Yes
ALLIA0178ZZ
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
DEF-11
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
M
A
B
DEF
N
O
P
1. Disconnect IPDM E/R.
2. Check continuity between rear window defogger harness con-
nector D651 (A) terminal 1 and IPDM E/R harness E124 (B) ter-
minal 60 connector.
3. Check continuity between rear window defogger harness con-
nector D651 (A) terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 5
NO
>> Replace or repair harness as necessary.
4.
CHECK FILAMENT
Check filament.
DEF-11, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check for intermittent incident. Refer to
GI-40, "Intermittent Incident"
NO
>> Repair filament. Refer to
.
5.
CHECK INTERMITTENT INCIDENT
Check intermittent incident.
GI-40, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Check the following.
• Battery power supply circuit
• IPDM E/R
NO
>> Repair or replace the malfunctioning parts.
Component Inspection
INFOID:0000000009484764
1.
CHECK FILAMENT
Check the filament for damage or open circuits.
.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair filament. Refer to
.
Rear window defog-
ger connector
Terminal
IPDM E/R
connector
Terminal
Continuity
D651 (A)
1
E124 (B)
60
Yes
Rear window defog-
ger connector
Terminal
Ground
Continuity
D651 (A)
1
No
LIIA2644E
DEF-12
< DTC/CIRCUIT DIAGNOSIS >
DOOR MIRROR DEFOGGER LH
DOOR MIRROR DEFOGGER LH
Description
INFOID:0000000009484765
Heats the heating wire with the power supply from the heated mirror relay to prevent the door mirror from fog-
ging up.
Component Function Check
INFOID:0000000009484766
1.
CHECK DOOR MIRROR DEFOGGER LH
Check that heating wire of door mirror defogger LH is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES
>> Door mirror defogger LH is OK.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000009484767
Regarding Wiring diagram information, refer to
1.
CHECK POWER SUPPLY
Check if the following fuse in the IPDM E/R is 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 DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R harness connector E120 ter-
minal 23 and ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Replace IPDM E/R. Refer to
PCS-27, "Removal and Installation"
3.
CHECK DOOR MIRROR DEFOGGER LH POWER SUPPLY CIRCUIT
COMPONENT PARTS
AMPERE
FUSE NO.
IPDM E/R
15A
43
Connector
Terminal
Condition
Voltage (V)
(Approx.)
(+)
(-)
E120
23
Ground
Rear window defogger
switch ON
Battery voltage
Rear window defogger
switch OFF
0
LIIA2049E
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