Idle Speed/Throttle Actuator - Mechanical: Testing and Inspection

THROTTLE OPENER INSPECTION

1. Warm up engine.
- Allow the engine to warm up to normal operating temperature.
2. Connect LEXUS hand-held tester or OBD II scan tool.
3. Check idle speed.

Idle speed: 650 ± 50 rpm





4. - Disconnect the vacuum hose from the throttle opener, and plug the hose end.
- Check the throttle opener setting speed.

Throttle opener setting speed: 700 - 1,000 rpm

- If the throttle opener setting is not as specified, replace the throttle body.
- Stop the engine.
- Reconnect the vacuum hose to the throttle opener.
- Start the engine, and check that the idle speed returns to the correct speed.

Idle speed: 650 ± 50 rpm

5. Disconnect LEXUS hand-held tester or OBD II scan tool.