On-Vehicle Inspection

1. INSPECT THROTTLE BODY.



- Check that the throttle linkage moves smoothly.



- Check the vacuum at each port.
- Start the engine.
- Check the vacuum with your finger.

Throttle Body Vacuum Port Signals:

2. INSPECT THROTTLE POSITION SENSOR.



- Apply vacuum to the throttle opener.
- Disconnect the sensor connector.
- Insert a thickness gauge between the throttle stop screw and stop lever.



- Using an ohmmeter, measure the resistance between each terminal.

Throttle Position Sensor Terminals Resistance Specifications:

- Reconnect the sensor connector.

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

Idle speed: 700 ± 50 rpm





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