Infiniti I35 (A33). Manual — part 348
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Wiring Diagram
NHEC0604
FOR USA
NHEC0604S03
MEC374E
SEF642XC
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ELECTRICAL LOAD SIGNAL
Wiring Diagram
EC-733
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FOR CANADA
NHEC0604S04
MEC375E
SEF642XC
ELECTRICAL LOAD SIGNAL
Wiring Diagram (Cont’d)
EC-734
![](/vehicles/zatt/ltherawowha/yose/kuts.png)
Diagnostic Procedure
NHEC0605
1
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 51 and ground under the following conditions.
SEC090D
MTBL1165
OK or NG
OK
©
GO TO 2.
NG
©
GO TO 3.
2
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Check voltage between ECM terminal 51 and ground under the following conditions.
SEC090D
MTBL1166
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 7.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure
EC-735
![](/vehicles/zatt/ltherawowha/yose/pivedome.png)
3
CHECK REAR WINDOW DEFOGGER FUNCTION
1. Start engine.
2. Turn ON the rear window defogger switch.
3. Check the rear windshield. Is the rear windshield heated up?
Yes or No
Yes
©
GO TO 4.
No
©
Refer to EL-184, “Rear Window Defogger”.
4
CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between ECM terminal 51 and rear window defogger relay terminal 5 and 7.
SEC125D
5. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors B1, M5
I
Harness connectors M229, F66
I
Diode M35
I
Harness for open and short between ECM and rear window defogger relay
©
Repair open circuit or short to ground or short to power in harness or connectors.
6
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-152.
©
INSPECTION END
7
CHECK HEADLAMP FUNCTION
1. Start engine.
2. Turn the lighting switch ON at 1st position with high beam.
3. Check that headlamps are illuminated.
OK or NG
OK
©
GO TO 8.
NG
©
Refer to EL-38, “HEADLAMP (FOR USA)” or “EL-52, “HEADLAMP (FOR CANADA) —
DAYTIME LIGHT SYSTEM”.
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure (Cont’d)
EC-736
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