Inspection Of Throttle Body

1. CLEAN THROTTLE BODY

(a) Using a soft brush and carburetor cleaner, clean the cast parts.

(b) Using compressed air, clean all the passages and apertures.

NOTICE: To prevent deterioration, do not clean the throttle position sensor.

2. INSPECT THROTTLE VALVE

(a) Apply vacuum hose to the throttle opener.

(b) Check that there is no clearance between the throttle stop screw and throttle lever when the throttle valve is fully closed.

INSPECT THROTTLE POSITION SENSOR

(a) Make an angle gauge as shown in the figure.

(b) Apply vacuum hose to the throttle opener.

(c) Set the throttle valve opening to 71 ° or 81 ° from the vertical position (incl. throttle valve fully closed angle 6°).

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Throttle Valve Opening Angle

Angle Gauge

Throttle Valve Opening Angle

For 71

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M/T Ohmmeter

M/T Ohmmeter

(d) Using an ohmmeter, check the continuity between each terminal.

Throttle valve opening angle

Continuity

IDL-E1

PSW - E1

71 ° from vertical

No continuity

No continuity

81 ° from vertical

No continuity

Continuity

Less than 7.5° from vertical

Continuity

No continuity

IF NECESSARY, ADJUST THROTTLE POSITION SENSOR

(a) Loosen the two set screws of the sensor.

(b) Apply vacuum hose to the throttle opener.

(c) Insert a 0.70 mm (0.028 in.) feeler gauge, between the throttle stop screw and stop lever.

(d) Connect the test probe of an ohmmeter to the terminals IDL and E1 of the sensor.

(e) Gradually turn the sensor clockwise until the ohm-meter deflects, and secure it with the two set screws.

(f) Recheck the continuity between terminals IDL and E1.

Clearance between lever and stop screw

Continuity (IDL - E1)

0.50 mm (0.020 in.)

Continuity

0.90 mm (0.035 in.)

No continuity

INSPECT THROTTLE POSITION SENSOR (See step 3 on page FI-141)

IF NECESSARY, ADJUST THROTTLE POSITION SENSOR

(a) Loosen the two set screws of the sensor.

(b) Apply vacuum hose to the throttle opener.

(c) Insert a 0.60 mm (0.024 in.) feeler gauge, between the throttle stop screw and stop lever.

(d) Connect the test probe of an ohmmeter to the terminals IDL and E2 of the sensor.

(e) Gradually turn the sensor clockwise until the ohmmeter deflects, and secure it with the two set screws.

(f) Recheck the continuity between terminals IDL and E2.

Clearance between lever and stop screw

Continuity (IDL - E2)

0.50 mm (0.020 in.)

Continuity

0.70 mm (0.028 in.)

No continuity

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