Accelerator Pedal Position Sensor: Description and Operation

The Accelerator Pedal Position Sensor (APPS) (1) is located inside the vehicle. It is attached to the accelerator pedal assembly (3).

The Accelerator Pedal Position Sensor (APPS) provides the Engine Control Module (ECM) with two DC voltage signals which change as the position of the accelerator pedal changes. One of the DC voltage signals will be half the voltage of the other signal.