NISSAN ALMERA N16 2001 Electronic Repair Manual

SchematicNJEL0533
YEL667C
REAR WINDOW DEFOGGER
Schematic
EL-139

Wiring Diagram Ð DEF Ð=NJEL0464
YEL668C
REAR WINDOW DEFOGGER
Wiring Diagram Ð DEF Ð
EL-140

YEL669C
REAR WINDOW DEFOGGER
Wiring Diagram Ð DEF Ð (Cont'd)
EL-141

YEL670C
REAR WINDOW DEFOGGER
Wiring Diagram Ð DEF Ð (Cont'd)
EL-142

Trouble DiagnosesNJEL0465DIAGNOSTIC PROCEDURENJEL0465S01SYMPTOM: Rear window defogger does not activate, or does
not go off after activating.
1 CHECK REAR WINDOW DEFOGGER OUTPUT SIGNAL
1. Turn ignition switch to ON position.
2. Check voltage between time control unit harness terminal 13 and ground.
SEL455X
OK or NG
OK©Check the following.
+Rear window defogger relay
(Refer to EL-146.)
+Rear window defogger circuit
+Rear window defogger filament
(Refer to EL-147.)
NG©GO TO 2.
2 CHECK DEFOGGER RELAY COIL SIDE CIRCUIT
1. Disconnect control unit connector.
2. Turn ignition switch to ON position.
3. Check voltage between time control unit terminal 13 and ground.
SEL456X
OK or NG
OK©GO TO 3.
NG©Check the following.
+10A fuse [No. 10, located in the fuse block (J/B)]
+Rear window defogger relay
+Harness for open or short between 10A fuse [No. 10, located in the fuse block (J/B)]
and rear window defogger relay
+Harness for open or short between rear window defogger relay and time control unit
REAR WINDOW DEFOGGER
Trouble Diagnoses
EL-143

3 CHECK REAR WINDOW DEFOGGER SWITCH INPUT SIGNAL
Check continuity between time control unit terminal 3 and ground.
SEL457X
OK or NG
OK©GO TO 4.
NG©Check the following.
+Rear window defogger switch
(Refer to EL-146.)
+Harness for open or short between time control unit and rear window defogger switch
+Rear window defogger switch ground circuit
4 CHECK POWER SUPPLY AND IGNITION INPUT SIGNAL
Check voltage between time control unit terminals 1 or 9 and ground.
SEL447X
OK or NG
OK©GO TO 5.
NG©Check the following.
+10A fuse or 15A fuse [No. 10 or No. 5, located in the fuse block (J/B)]
+Harness for open or short between time control unit and fuse
REAR WINDOW DEFOGGER
Trouble Diagnoses (Cont'd)
EL-144

5 CHECK CONTROL UNIT GROUND CIRCUIT
Check continuity between time control unit terminal 16 and ground.
SEL448X
Ye s©Replace time control unit.
No©Repair harness or connectors.
REAR WINDOW DEFOGGER
Trouble Diagnoses (Cont'd)
EL-145

SEL970W
Electrical Components Inspection=NJEL0076REAR WINDOW DEFOGGER RELAYNJEL0076S01Check continuity between terminals 3 and 5, 6 and 7.
Condition Continuity
12V direct current supply between ter-
minals 1 and 2Ye s
No current supply No
NEL797
REAR WINDOW DEFOGGER SWITCHNJEL0076S02Check continuity between terminals when rear window defogger
switch is pushed and released.
Terminals Condition Continuity
3-5Rear window defogger
switch is pushed.Ye s
Rear window defogger
switch is released.No
REAR WINDOW DEFOGGER
Electrical Components Inspection
EL-146

SEL263
Filament Check=NJEL00771. Attach probe circuit tester (in volt range) to middle portion of
each filament.
SEL122R
+When measuring voltage, wrap tin foil around the top of
the negative probe. Then press the foil against the wire
with your finger.
SEL265
2. If a filament is burned out, circuit tester registers 0 or 12 volts.
SEL266
3. To locate burned out point, move probe to left and right along
filament. Test needle will swing abruptly when probe passes
the point.
REAR WINDOW DEFOGGER
Filament Check
EL-147

Filament RepairNJEL0078REPAIR EQUIPMENTNJEL0078S011) Conductive silver composition (Dupont No. 4817 or equivalent)
2) Ruler 30 cm (11.8 in) long
3) Drawing pen
4) Heat gun
5) Alcohol
6) Cloth
BE540
REPAIRING PROCEDURENJEL0078S021. Wipe broken heat wire and its surrounding area clean with a
cloth dampened in alcohol.
2. Apply a small amount of conductive silver composition to tip of
drawing pen.
Shake silver composition container before use.
3. Place ruler on glass along broken line. Deposit conductive sil-
ver composition on break with drawing pen. Slightly overlap
existing heat wire on both sides [preferably 5 mm (0.20 in)] of
the break.
SEL012D
4. After repair has been completed, check repaired wire for con-
tinuity. This check should be conducted 10 minutes after silver
composition is deposited.
Do not touch repaired area while test is being conducted.
SEL013D
5. Apply a constant stream of hot air directly to the repaired area
for approximately 20 minutes with a heat gun. A minimum dis-
tance of 3 cm (1.2 in) should be kept between repaired area
and hot air outlet. If a heat gun is not available, let the repaired
area dry for 24 hours.
REAR WINDOW DEFOGGER
Filament Repair
EL-148