Throttle Position Sensor: Description and Operation

Throttle Angle (TPS) Sensor:

The Throttle Angle Sensor, connected to the side of the throttle body, is a rotary potentiometer. It is connected to the throttle shaft. As the throttle angle changes, the throttle angle sensor varies the voltage signal to the ECU. The ECU uses this voltage signal along with the MAP Sensor voltage signal to determine engine load. The typical output voltage at idle is approx. 0 - 0.5 volts and at wide open throttle approx. 4.5 volts.