Throttle Position Sensor: Description

The throttle position sensor mounts to the side of the throttle body (Fig 1).

The Throttle Position Sensor (TPS) connects to the throttle blade shaft. The TPS is a variable resistor that provides the PCM with an input signal (voltage). The signal represents throttle blade position. As the position of the throttle blade changes, the resistance of the TPS changes.

Fig 1: Identifying Throttle Position Sensor and Idle Air Control Motor

Courtesy of DAIMLERCHRYSLER CORP.