Throttle Position Sensor: Testing and Inspection

1. INSPECT THROTTLE BODY

Check that the throttle linkage moves smoothly.

2. INSPECT THROTTLE POSITION SENSOR




a. Apply vacuum to the throttle opener.
b. Disconnect the sensor connector.




c. Using an ohmmeter, measure the resistance between each terminal.
d. Reconnect the sensor connector.

3. INSPECT THROTTLE OPENER
a. Allow the engine to warm up to normal operating temperature.
b. Check idle speed.

Idle speed: 700 ± 50 rpm




c. Disconnect the vacuum hose from the throttle opener, and plug the hose end.
d. Check the throttle opener setting speed.

Throttle opener setting speed: 900 - 1,950 rpm

If the throttle opener setting is not as specified, replace the throttle body.

e. Stop the engine.
f. Reconnect the vacuum hose to the throttle opener.
g. Start the engine and check that the idle speed returns to the correct speed.