Throttle Position Sensor: Description and Operation

PURPOSE/OPERATION
The throttle position sensor is a rotating type variable resistor. It senses the throttle valve angle. As the throttle shaft rotates, the output voltage of the throttle position sensor changes. The engine control module determines the throttle valve opening based on the output voltage. The engine control module computes throttle valve opening change (output voltage change) and judges the engine acceleration state and accordingly corrects fuel injection amount during acceleration.