Nissan Silvia. Manual - part 135

CHECK IGNITION TIMING

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”.
3. Disconnect throttle position sensor harness connector.

SEC336C

4. Start engine.
5. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.
6. Check ignition timing at idle using a timing light.

SEF284G

Ignition timing:

M/T 15°

2° BTDC

A/T 15°

2° BTDC (in “P” or “N” position)

OK or NG

GO TO 8.

1. Adjust ignition timing to the specified value by turning camshaft position sensor after

loosening bolts which secure camshaft position sensor.

2. GO TO 8.

CHECK BASE IDLE SPEED

Without CONSULT-II

1. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.
2. Check idle speed.

750

50 rpm (in “P” or “N” position)

OK or NG

OK (A/T models)

GO TO 14.

OK (M/T models)

GO TO 21.

GO TO 9.

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Basic Inspection (Cont’d)

EC-55

ADJUST BASE IDLE SPEED

Without CONSULT-II

Adjust idle speed by turning idle speed adjust screw.

SEC335C

750

50 rpm (in “P” or “N” position)

A/T

GO TO 14.

M/T

GO TO 21.

CHECK THROTTLE POSITION SWITCH CLOSED POSITION (FOR A/T MODELS)

With CONSULT-II

1. Touch “BACK”. (Cancel “IACV-AAC/V ADJ” in “WORK SUPPORT” mode.)
2. Stop engine and turn ignition switch “ON”.
3. Select “A/T” and then select “CLOSED THL/SW” in “DATA MONITOR” mode with CONSULT-II.
4. Read “CLOSED THL/SW” signal under the following conditions.

Insert a 0.75 mm (0.0295 in) and 0.85 mm (0.0335 in) feeler gauge alternately between stopper and throttle drum as
shown in the figure and check the signal.

SEC336C

SEF059Y

“CLSD THL/P SW” signal should remain “ON” while inserting 0.75 mm (0.0295 in) feeler gauge.
“CLSD THL/P SW” signal should remain “OFF” while inserting 0.85 mm (0.0335 in) feeler gauge.

OK or NG

GO TO 24.

GO TO 11.

TROUBLE DIAGNOSIS — BASIC INSPECTION

Basic Inspection (Cont’d)

EC-56

ADJUST THROTTLE POSITION SWITCH CLOSED POSITION-I (FOR A/T MODELS)

With CONSULT-II

1. Loosen throttle position sensor fixing bolts.
2. Insert 0.75 mm (0.0295 in) feeler gauge between stopper and throttle drum as shown in the figure.

SEC350C

3. Turn throttle position sensor body counterclockwise until “CLOSED THL/SW” signal switches to “OFF”.

SEC351C

SEF060Y

GO TO 12.

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Basic Inspection (Cont’d)

EC-57

ADJUST THROTTLE POSITION SWITCH CLOSED POSITION-II (FOR A/T MODELS)

With CONSULT-II

1. Temporarily tighten sensor body fixing bolts as follows.

Gradually move the sensor body clockwise and stop it when “CLOSED THL/SW” signal switches from “OFF”
to “ON”, then temporarily tighten sensor body fixing bolts.

SEC351C

2. Make sure two or three times that the signal is “ON” when the throttle valve is closed and “OFF” when it is opened.
3. Remove 0.75 mm (0.0295 in) feeler gauge then insert 0.85 mm (0.0335 in) feeler gauge.
4. Make sure two or three times that the signal remains “OFF” when the throttle valve is closed.
5. Tighten throttle position sensor.
6. Check the “CLOSED THL/SW” signal again.

The signal remains “OFF” while closing throttle valve.

OK or NG

GO TO 13.

GO TO 11.

RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY (FOR A/T MODELS)

With CONSULT-II

NOTE:
Always warm up engine to normal operating tempearture. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Start engine.
2. Warm up engine to normal operating temperature.
3. Select “ENGINE” and then select “CLSD THL POS” in “DATA MONITOR” mode.
4. Stop engine. (Turn ignition switch “OFF”.)
5. Turn ignition switch “ON” and wait at least 5 seconds.

SEF864V

6. Turn ignition switch “OFF” and wait at least 5 seconds.
7. Repeat steps 5 and 6 until “CLSD THL POS” signal changes to “ON”.

GO TO 24.

TROUBLE DIAGNOSIS — BASIC INSPECTION

Basic Inspection (Cont’d)

EC-58

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