Nissan Terrano model r20 series 2004. Instruction — part 406
Trouble Diagnoses
SYMPTOM CHART
Symptom
Diagnoses service procedure
Rear window defogger and door mirror defogger do not activate.
1. Check time control unit power supply and ground circuit.
2. Check rear window defogger switch.
3. Check rear window defogger switch circuit.
4. Check rear window defogger signal.
5. Check rear window defogger relay.
Rear window defogger or door mirror defogger do not activate.
1. Check fuse (No. 14, No. 15 or No. 1).
2. Check filament.
3. Check harness between fuse block (J/B) and defogger.
4. Check defogger ground circuit.
Rear window defogger and door mirror defogger do not go off
after activating about 15 minutes.
1. Check time control unit power supply and ground circuit.
2. Check rear window defogger switch.
3. Check rear window defogger switch circuit.
POWER SUPPLY AND GROUND CIRCUIT CHECK
Main power supply circuit check
Terminals
Ignition switch position
!
@
OFF
ACC
ON
U09
Ground
Battery
voltage
Battery
voltage
Battery
voltage
U01
Ground
—
—
Battery
voltage
Ground circuit check
Terminals
Continuity
U16
- Ground
Yes
YEL888E
YEL300D
REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER
EL-128
CHECK REAR WINDOW DEFOGGER SWITCH
1. Disconnect A/C control panel connector
(rear window defogger switch)
M771
.
2. Check continuity between terminals
q
3
and
q
5
.
With rear window defogger switch ON:
Continuity should exist.
With rear window defogger switch OFF:
Continuity should not exist.
OK
E
NG
Replace rear window
defogger switch.
Rear window defogger switch is OK.
CHECK REAR WINDOW DEFOGGER SWITCH CIRCUIT
1. Check continuity between fuse block
(J/B) connector terminal
M19
and A/C
control panel connector terminal
q
3
.
Continuity should exist.
2. Check continuity between fuse block
(J/B) connector terminal
M19
and
ground.
Continuity should not exist.
OK
E
NG
Repair harness or connec-
tor.
1. Check continuity between A/C control
panel connector terminal
q
5
and
ground.
Continuity should exist.
OK
E
NG
Repair harness or connec-
tor.
Rear window defogger switch circuit is
OK.
YEL889E
YEL890E
YEL891E
H
H
H
REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER
Trouble Diagnoses (Cont’d)
EL-129
CHECK REAR WINDOW DEFOGGER SIGNAL
1. Check voltage between fuse block
(J/B) terminal
M19
and ground.
With rear window defogger switch ON:
Approx. 0V
With rear window defogger switch OFF:
Battery voltage
OK
E
NG
Replace time control unit.
1. Disconnect time control unit.
2. Ignition switch ON.
3. Check voltage between time control
unit terminal
U13
and ground.
Battery voltage should exist.
OK
E
NG
Replace time control unit.
Rear window defogger signal is OK.
CHECK REAR WINDOW DEFOGGER RELAY
1. Check voltage between fuse block
(J/B) terminals
BM1
,
M26
and ground.
With rear window defogger switch ON:
Battery voltage
OK
E
NG
Replace rear window relay.
Rear window defogger relay is OK.
YEL892E
YEL893E
YEL894E
H
H
H
REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER
Trouble Diagnoses (Cont’d)
EL-130
CHECK REAR WINDOW/DOOR MIRROR DEFOGGER
CIRCUIT
CHECK REAR WINDOW DEFOGGER
CIRCUIT.
1. Disconnect rear window defogger con-
nector.
2. Check continuity between rear window
defogger connector terminal 1and fuse
block (J/B) terminal
BM1
.
Continuity should exist.
3. Check continuity between rear window
defogger connector terminal
q
2
and
ground.
Continuity should not exist.
OK
E
NG
Repair or replace harness.
CHECK DOOR MIRROR DEFOGGER
CIRCUIT.
1. Disconnect door mirror defogger con-
nector.
2. Check continuity between door mirror
defogger connector terminal
q
3
and
fuse block (J/B) terminal
M26
.
Continuity should exist.
3. Check continuity between door mirror
defogger connector terminal
q
2
and
ground.
Continuity should exist.
OK
E
NG
Repair or replace harness.
Rear window defogger and door mirror
defogger circuit is OK.
YEL895E
YEL896E
YEL897E
YEL898E
H
H
REAR WINDOW DEFOGGER AND DOOR MIRROR DEFOGGER
Trouble Diagnoses (Cont’d)
EL-131
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