Component Testing

For Trouble Code charts see Computers and Control Systems/Testing and Inspection/Procedures/Diagnostic Charts.

To test the throttle position sensor only, refer to the following:
- The Throttle Position Sensor (TPS) can be tested with a digital voltmeter. The center terminal of the sensor is the output terminal.
- With the ignition switch in the ON position, check the output voltage at the center terminal wire of the connector.
- Check the output voltage at idle and at Wide Open Throttle (WOT). At idle, TPS output voltage should be approximately 0.5 volts. At WOT, TPS output voltage should be approximately 3.7 volts. The output voltage should gradually increase as the throttle plate moves slowly from idle to WOT.
- Check for spread terminals at the sensor and PCM connections before replacing the TPS.