Nissan Silvia. Manual — part 38

1. POWER Indicator Lamp Does Not Come On

NMAT0073

SYMPTOM:
POWER indicator lamp does not come on for about 2 seconds
when turning ignition switch to “ON”.

1

CHECK TCM POWER SOURCE STEP 1

1. Turn ignition switch to ON position.

(Do not start engine.)

2. Check voltage between TCM harness connector M25, M26 terminal Nos. 10 (G/OR), 19 (G/OR), 28 (R/W) and ground.

SAT611J

OK or NG

OK

©

GO TO 2.

NG

©

GO TO 3.

2

CHECK TCM POWER SOURCE STEP 2

1. Turn ignition switch to OFF position.
2. Check voltage between TCM harness connector M26 terminal No. 28 (R/W) and ground.

SAT612JE

OK or NG

OK

©

GO TO 4.

NG

©

GO TO 3.

3

DETECT MALFUNCTIONING ITEM

Check the following items:

I

Harness for short or open between ignition switch and TCM terminals 10, 19 and 28 (Main harness)

I

Ignition switch and 10A fuse [No. 12 or 28, located in the fuse block (J/B)]
Refer to EL-7, “Schematic”.

OK or NG

OK

©

GO TO 4.

NG

©

Repair or replace damaged parts.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

1. POWER Indicator Lamp Does Not Come On

AT-149

4

CHECK TCM GROUND CIRCUIT

1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminal Nos. 25, 48 and ground. Refer to “Wiring Diagram — AT — MAIN”, AT-86.

Continuity should exist.

If OK, check harness for short to ground and short to power.

OK or NG

OK

©

GO TO 5.

NG

©

Repair open circuit or short to ground or short to power in harness or connectors.

5

CHECK LAMP CIRCUIT

1. Turn ignition switch to “ON” position.
2. Set A/T mode switch to “ON” position.
3. Check voltage between TCM harness connector M25 terminal No. 13 (G) and ground.

SAT529JA

Does battery voltage exist?

Yes

©

GO TO 6.

No

©

Check the following items.

I

Fuse

I

POWER indicator lamp
Refer to EL-73, “Schematic”.

I

Harness for short or open between ignition switch and POWER indicator lamp (Main
harness)

I

Refer to EL-7, “Schematic”.

I

Harness for short or open between POWER indicator lamp and TCM

6

CHECK SYMPTOM

Check again.

OK or NG

OK

©

INSPECTION END

NG

©

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-

nector.

2. POWER or SNOW Indicator Lamp Does Not
Come On

NMAT0258

SYMPTOM:
POWER or SNOW indicator lamp does not come on when
turning A/T mode switch in the appropriate position.

TROUBLE DIAGNOSES FOR SYMPTOMS

1. POWER Indicator Lamp Does Not Come On (Cont’d)

AT-150

1

CHECK SYMPTOM

Is “1. POWER or SNOW Indicator Lamp Come On” OK?

Yes or No

Yes

©

GO TO 2.

No

©

Go to 1. POWER Indicator Lamp Come On, AT-149.

2

DETECT MALFUNCTIONING ITEM

Check the following items:

I

A/T mode switch (Refer to AT-189.)

I

Harness continuity between ignition switch and A/T mode switch

I

Harness continuity between A/T mode switch and TCM

I

Ignition switch (Refer to EL-7, “Schematic”.)

OK or NG

OK

©

INSPECTION END

NG

©

Repair or replace damaged parts.

3. O/D OFF Indicator Lamp Does Not Come On

NMAT0259

SYMPTOM:
O/D OFF indicator lamp does not come on when setting over-
drive control switch to OFF position.

1

DETECT MALFUNCTIONING ITEM

Check the following items:

I

Overdrive control switch (Refer to AT-189.)

I

Harness continuity between ignition switch and O/D OFF indicator lamp

I

Ignition switch (Refer to EL-7, “Schematic”.)

OK or NG

OK

©

INSPECTION END

NG

©

Repair or replace damaged parts.

GI

MA

EM

LC

EC

FE

CL

MT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

2. POWER or SNOW Indicator Lamp Does Not Come On (Cont’d)

AT-151

4. POWER Indicator Lamp Does Not Come On

=NMAT0260

SYMPTOM:
POWER indicator lamp does not come on for about 3 seconds
when depressing and releasing accelerator pedal fully.

1

CHECK SELF-DIAGNOSTIC RESULTS

Does self-diagnosis show damage to throttle position sensor circuit?

SAT808H

Yes or No

Yes

©

GO TO 2.

No

©

Check damaged circuit. Refer to AT-98.

2

CHECK THROTTLE POSITION SENSOR

Check throttle position sensor. Refer to EC-141, “Component Description”.

SAT414K

OK or NG

OK

©

GO TO 3.

NG

©

Repair or replace damaged parts.

3

CHECK TCM INSPECTION

1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG

OK

©

INSPECTION END

NG

©

Repair or replace damaged parts.

TROUBLE DIAGNOSES FOR SYMPTOMS

4. POWER Indicator Lamp Does Not Come On

AT-152