Nissan Silvia. Instruction — part 176

Wiring Diagram

NMEC0797

TEC821

GI

MA

EM

LC

FE

CL

MT

AT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

ELECTRICAL LOAD SIGNAL

Wiring Diagram

EC-219

Diagnostic Procedure

NMEC0798

1

INSPECTION START

Do you have CONSULT-II?

Yes or No

Yes

©

GO TO 2.

No

©

GO TO 4.

2

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I

With CONSULT-II

1. Turn ignition switch “ON”.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.

SEC426C

OK or NG

OK

©

GO TO 3.

NG

©

GO TO 6.

3

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II

With CONSULT-II

1. Turn ignition switch “ON”.
2. Check “LOAD SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.

SEC427C

OK or NG

OK

©

INSPECTION END

NG

©

GO TO 9.

ELECTRICAL LOAD SIGNAL

Diagnostic Procedure

EC-220

4

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I

Without CONSULT-II

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 33 and ground under the following conditions.

SEC428C

OK or NG

OK

©

GO TO 5.

NG

©

GO TO 6.

5

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II

Without CONSULT-II

1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 33 and ground under the following conditions.

SEC429C

OK or NG

OK

©

INSPECTION END

NG

©

GO TO 9.

6

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 7.

No

©

Refer to EL-96, “Rear Window Defogger”.

GI

MA

EM

LC

FE

CL

MT

AT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

ELECTRICAL LOAD SIGNAL

Diagnostic Procedure (Cont’d)

EC-221

7

CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT

1. Stop engine
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between ECM terminal 33 and rear window defogger relay terminals 5, 7 under the following

conditions.

SEC430C

5. Also check harness for short to ground and short to power.

OK or NG

OK

©

GO TO 12.

NG

©

GO TO 8.

8

DETECT MALFUNCTIONING PART

Check the following.

I

Harness connectors F4, M60

I

Harness connectors B3, M9

I

Joint connector 1

I

Harness 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.

9

CHECK HEADLAMP FUNCTION

1. Start engine.
2. Turn the lighting switch “2ND”.
3. Check that headlamps are illuminated.

Do the headlamps illuminate in both “High” and “Low” positions?

Yes or No

Yes

©

GO TO 10.

No

©

Refer to EL-28, “HEADLAMP”.

ELECTRICAL LOAD SIGNAL

Diagnostic Procedure (Cont’d)

EC-222