Throttle Position Sensor: Testing and Inspection

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, monitor the output voltage at the center terminal wire of the connector -- while slowly moving the throttle from the idle position to Wide Open Throttle (WOT).
- At idle, TPS output voltage should be greater than 0.6 volts.
- At wide open throttle, TPS output voltage should be less than 4.5 volts.
- The output voltage should gradually increase as the throttle plate moves slowly from idle to WOT.

NOTE: Check for spread terminals at the sensor and PCM connections before replacing the TPS.

NOTE: Complete circuit testing for this system or component can be found at the system level. DTC Test - CODE TO TC TEST CHART (Checking for Trouble Codes)