Nissan Frontier D22. Manual — part 387

TROUBLE DIAGNOSIS

EC-651

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

9.

ADJUSTMENT CLOSED THROTTLE POSITION SWITCH IDLE POSITION-II

1.

Turn ignition switch ON.

2.

Select “TP SW/TP SEN IDLE POSI ADJ” in “WORK SUPPORT” mode.

3.

Insert 0.35 mm (0.0138 in) feeler gauge between throttle adjust
screw and throttle drum as shown in the figure.

4.

Open throttle valve and then close.

5.

Check “CLSD THL/P SW” signal.
“CLSD THL/P SW” signal should remain “OFF” when the
throttle valve is closed.

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 10.

10.

ADJUSTMENT THROTTLE POSITION SWITCH IDLE POSITION-III

With CONSULT-II

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

>> GO TO 11.

BBIA0419E

SEF305Y

SEF689W

EC-652

[VG33E]

TROUBLE DIAGNOSIS

11.

ADJUSTMENT THROTTLE POSITION SWITCH IDLE POSITION-IV

With CONSULT-II

1.

Remove 0.35 mm (0.0138 in) feeler gauge then insert 0.3 mm (0.012 in) feeler gauge.

2.

Temporarily tighten sensor body fixing bolts as follows.

–

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

3.

Make sure two or three times that the signal is “ON” when the
throttle valve is closed and “OFF” when it is opened.

4.

Remove 0.3 mm (0.012 in) feeler gauge then insert 0.4 mm
(0.016 in) feeler gauge.

5.

Make sure two or three times that the signal remains “OFF”
when the throttle valve is closed.

6.

Tighten throttle position sensor.

7.

Check the “CLSD THL/P SW” signal again.
The signal remains “OFF” while closing throttle valve.

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 8.

12.

RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY

With CONSULT-II

NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor
idle position memory will not be reset correctly.

1.

Remove feeler gauge.

2.

Start engine.

3.

Warm up engine to normal operating temperature.

4.

Select “TP SW/TP SEN IDLE POSI ADJ” in “WORK SUPPORT” mode.

5.

Stop engine. (Turn ignition switch OFF.)

6.

Turn ignition switch ON and wait at least 5 seconds.

7.

Turn ignition switch OFF and wait at least 5 seconds.

8.

Repeat steps 5 and 6 until “CLSD THL POS” signal changes to
“ON”.

>> GO TO 13.

SEF689W

SEF864V

SEF197Y

TROUBLE DIAGNOSIS

EC-653

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

13.

CHECK TARGET IDLE SPEED

With CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Select “ENG SPEED” in “DATA MONITOR” mode.

3.

Check idle speed.

OK or NG

OK

>> INSPECTION END.

NG

>> 1. Adjust idle speed. Refer to

EC-604, "Idle Speed/Igni-

tion Timing/Idle Mixture Ratio Adjustment"

.

2. GO TO 27.

14.

CHECK FI CAM FUNCTION

With GST

1.

Turn ignition switch ON.

2.

Select MODE 1 with GST.

3.

Start engine and warm it up.

4.

When engine coolant temperature is 75 to 85

°C (167 to 185°F), check the following.

–

The center of mark A is aligned with mark C .

–

The cam follower lever's roller is not touching the fast idle cam.

OK or NG

OK >> GO

TO

16.

NG

>> 1. Check FI cam. Refer to

EC-615, "Fast Idle Cam (FIC)

Inspection and Adjustment"

.

2. GO TO 16.

M/T: 750

±50 rpm (in Neutral position)

A/T: 750

±50 rpm (in P or N position)

SEF174Y

SEF971R

EC-654

[VG33E]

TROUBLE DIAGNOSIS

15.

CHECK FI CAM FUNCTION

No Tools

1.

Set the voltmeter between ECM terminal 59 (Engine coolant
temperature sensor signal) and ground.

2.

Start engine and warm it up.

3.

When the voltage is between 1.10 to 1.36V, check the following.

–

The center of mark A is aligned with mark C .

–

The cam follower lever's roller is not touching the fast idle cam.

OK or NG

OK

>> GO TO 16.

NG

>> 1. Check FI cam. Refer to

EC-615, "Fast Idle Cam (FIC)

Inspection and Adjustment"

.

2. GO TO 16.

16.

CHECK IGNITION TIMING

Without CONSULT-II

1.

Warm up engine to normal operating temperature.

2.

Stop engine and disconnect throttle position sensor harness
connector.

3.

Start engine.

4.

Check ignition timing at idle using a timing light.

OK or NG

OK

>> GO TO 17.

NG

>> 1. Adjust ignition timing by turning distributor. Refer to

EC-604, "Idle Speed/Ignition Timing/Idle Mixture
Ratio Adjustment"

.

2. GO TO 17.

SEF119W

SEF971R

BBIA0424E

M/T: 10

±5° BTDC (in Neutral position)

A/T: 10

±5° BTDC (in Neutral position)

SEF927Z