Infiniti I35 (A33). Manual — part 397
Trouble Diagnoses
NHEL0075
DIAGNOSTIC PROCEDURE
NHEL0075S01
SYMPTOM: Rear window defogger does not activate, or does
not go off after activating.
1
CHECK REAR WINDOW DEFOGGER OUTPUT SIGNAL
With CONSULT-II
Select “ACTIVE TEST” in “REAR DEFOGGER” with CONSULT-II.
SEL353W
Without CONSULT-II
1. Turn ignition switch to ON position.
2. Check voltage between smart entrance control unit harness connector M144 terminal 37 (G/R) and ground.
SEL997X
OK or NG
OK
©
Check the following.
I
Rear window defogger relay
(Refer to EL-192.)
I
Rear window defogger circuit
I
Rear window defogger filament
(Refer to EL-192.)
NG
©
GO TO 2.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
IDX
REAR WINDOW DEFOGGER
Trouble Diagnoses
EL-189
2
CHECK DEFOGGER RELAY COIL SIDE CIRCUIT
1. Disconnect smart entrance control unit connector.
2. Turn ignition switch to ON position.
3. Check voltage between smart entrance control unit harness connector M144 terminal 37 (G/R) and ground.
SEL998X
OK or NG
OK
©
GO TO 3.
NG
©
Check the following.
I
10A fuse [No. 10, located in the fuse block (J/B)]
I
Rear window defogger relay
I
Harness for open or short between 10A fuse [No. 10, located in the fuse block (J/B)]
and rear window defogger relay
I
Harness for open or short between rear window defogger relay and smart entrance
control unit
REAR WINDOW DEFOGGER
Trouble Diagnoses (Cont’d)
EL-190
3
CHECK REAR WINDOW DEFOGGER SWITCH INPUT SIGNAL
With CONSULT-II
Select “REAR DEF SW” in “DATA MONITOR” mode with CONSULT-II.
SEL352W
Without CONSULT-II
Check continuity between smart entrance control unit harness connector M143 terminal 14 (G/W) and ground.
SEL999X
OK or NG
OK
©
GO TO 4.
NG
©
Check the following.
1. Harness for open or short between smart entrance control unit and rear window
defogger switch
2. Rear window defogger switch ground circuit
3. Replace rear window defogger switch.
4
CHECK POWER SUPPLY AND IGNITION INPUT SIGNAL
Check voltage between smart entrance control unit harness connector M144 terminal 27 (G), M145 terminal 49 (R/B) and
ground.
SEL001Y
OK or NG
OK
©
GO TO 5.
NG
©
Check the following.
I
10A fuse [No. 10 or No. 13, located in the fuse block (J/B)]
I
Harness for open or short between smart entrance control unit and fuse
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
IDX
REAR WINDOW DEFOGGER
Trouble Diagnoses (Cont’d)
EL-191
5
CHECK CONTROL UNIT GROUND CIRCUIT
Check continuity between smart entrance control unit harness connector M144 terminal 43 (B), M145 terminal 64 (B) and
ground.
SEL002Y
Yes
©
Replace smart entrance control unit.
No
©
Repair harness or connectors.
SEC202B
Electrical Components Inspection
NHEL0076
REAR WINDOW DEFOGGER RELAY
NHEL0076S01
Check continuity between terminals 3 and 5, 6 and 7.
Condition
Continuity
12V direct current supply between ter-
minals 1 and 2
Yes
No current supply
No
SEL263
Filament Check
NHEL0077
1.
Attach probe circuit tester (in volt range) to middle portion of
each filament.
SEL122R
I
When measuring voltage, wrap tin foil around the top of
the negative probe. Then press the foil against the wire
with your finger.
REAR WINDOW DEFOGGER
Trouble Diagnoses (Cont’d)
EL-192
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