Throttle Position Sensor: Testing and Inspection

The Throttle Position Sensor (TPS) operation is monitored by the Engine Control Module (ECM) and a short or open in the TPS circuit should set Diagnostic Trouble Codes (DTC) 7.

When testing the TPS with a DVOM, watch for a smooth transition from 0.5 volts to 4.5 volts while opening the throttle with the ignition key ON.