Infiniti G20 (P11). Manual - part 176

CHECK IGNITION TIMING-I

With CONSULT-II

1. Turn ignition switch “OFF”.
2. Release vacuum from throttle opener.
3. Remove vacuum pump and vacuum hose from throttle opener.
4. Reinstall original vacuum hose to throttle opener securely.
5. Start engine and warm it up to normal operating temperature.
6. Select “IGNITION TIMING ADJ” in “WORK SUPPORT” mode with CONSULT-II.
7. Touch “START”.
8. 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 16.

1. Adjust ignition timing by turning distributor. Refer to “Idle Speed/Ignition Timing/Idle

Mixture Ratio Adjustment”, EC-53.

2. GO TO 16.

CHECK IGNITION TIMING-II

With CONSULT-II

Touch “MODE” or “BACK”. (Cancel “IGNITION TIMING ADJ” in “WORK SUPPORT” mode.)
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 30.

GO TO 23.

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Basic Inspection (Cont’d)

EC-115

CHECK THROTTLE POSITION SWITCH CLOSED POSITION-II

Without CONSULT-II

1. Disconnect closed throttle position switch harness connector.
2. Check continuity between closed throttle position switch terminals 4 and 5 under the following conditions.

SEF711X

Insert the 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between the stopper and throttle drum
as shown in the figure.

SEF862X

“Continuity should exist” while inserting 0.05 mm (0.0020 in) feeler gauge.
“Continuity should not exist” while inserting 0.15 mm (0.0059 in) feeler gauge.

OK or NG

GO TO 20.

GO TO 18.

TROUBLE DIAGNOSIS — BASIC INSPECTION

Basic Inspection (Cont’d)

EC-116

ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I

Without CONSULT-II

1. Loosen throttle position sensor fixing bolts.
2. Confirm that proper vacuum is applied. Refer to Test No. 10. During adjustment, vacuum should be applied.
3. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.

SEF862X

SEF711X

4. Turn throttle position sensor body counterclockwise until continuity does not exist.

SEF867X

GO TO 19.

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Basic Inspection (Cont’d)

EC-117

ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II

Without CONSULT-II

1. Temporarily tighten sensor body fixing bolts as follows.

Gradually move the sensor body clockwise and stop it when the continuity comes to exist, then temporarily
tighten sensor body fixing bolts.

SEF867X

2. Make sure two or three times that the continuity exists when the throttle valve is closed and continuity does not exist

when it is opened.

3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the continuity does not exist when the throttle valve is closed.
5. Tighten throttle position sensor.
6. Check the continuity again.

Continuity does not exist while closing the throttle valve.

OK or NG

GO TO 20.

GO TO 18.

RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY

Without CONSULT-II

NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Confirm that proper vacuum is applied. Refer to Test No. 10.
2. Attach blind cap to vacuum port from which vacuum hose to throttle opener was disconnected.
3. Start engine.
4. Warm up engine to normal operating temperature.
5. Stop engine. (Turn ignition switch “OFF”.)
6. Turn ignition switch “ON” and wait at least 5 seconds.

SEF864V

7. Turn ignition switch “OFF” and wait at least 10 seconds.
8. Repeat steps 6 and 7, 20 times.

GO TO 21.

TROUBLE DIAGNOSIS — BASIC INSPECTION

Basic Inspection (Cont’d)

EC-118

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