Off-Vehicle Inspection

Refer to Throttle Body Service and Repair for Removal and Installation Procedures

THROTTLE BODY INSPECTION
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 and Throttle Opener.
2. Inspect Throttle Valve




(a) Disconnect the throttle opener vacuum hose from the throttle body.
(b) Apply vacuum to the throttle opener.
(c) Check that there is no clearance between the throttle stop screw and throttle lever when the throttle valve is fully closed.
(d) Reconnect the throttle opener vacuum hose to the throttle body.

Throttle Position Sensor




1. Inspect throttle position sensor
(a) Apply vacuum to the Throttle Opener.
(b) Insert a 0.50 mm (0.020 in.) or 0.70 mm (0.028 in.) feeler gauge between the throttle stop screw and stop lever.




(c) Using an ohmmeter, measure the resistance between each terminal.




2. If Necessary, Adjust throttle position sensor
For information, refer to Throttle Position Sensor Adjustment.
Adjustments




(a) Loosen the 2 set screws of the sensor.




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




(c) Connect the tester probe of an ohmmeter to the terminals IDL and E2 of the sensor.




(d) Gradually turn the sensor clockwise until the ohmmeter deflects, and secure it with the 2 set screws.




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

Clearance between
lever and stop screw / (IDL - E2)
0.50 mm (0.020 in) / Continuity
0.70 mm (0.028 in) / No continuity