Sensor Inspection

Throttle Position Sensor:

1. Disconnect the throttle position sensor connector.

Throttle Position Sensor Test Connection:

2. Measure resistance between terminal 4 (sensor ground) and terminal 1 (sensor power). The standard resistance should be 3.5-6.5 k ohms.

Throttle Position Sensor Test Connection:

3. Connect a pointer type ohmmeter between terminal 4 (sensor ground) and terminal 2 (sensor output).
4. Operate the throttle valve slowly from the idle position to the full open position and check that the resistance changes smoothly in proportion with the throttle valve opening angle.
5. If the resistance is out of specification, or fails to change smoothly, replace the throttle position sensor.