Throttle Position Sensor: Description and Operation

Throttle Position Sensor Circuit:

PURPOSE
The Throttle Position Sensor (TPS) is a rotating type variable resistor. It senses the throttle valve angle.

OPERATION
As the throttle shaft rotates, the output voltage of the TPS changes. The Engine Control Module (ECM) determines the throttle valve opening based on the output voltage. The ECM computes throttle valve opening change (output voltage change) and judges the engine acceleration state and accordingly corrects fuel injection amount during acceleration.