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Home >> Pontiac >> 2004 >> Grand Prix GTP >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Introduction) - 3.8L >> Description and Operation >> Throttle Actuator Control (TAC) System Description >> Accelerator Pedal Position (APP) Sensor

Accelerator Pedal Position (APP) Sensor

The accelerator pedal contains two individual APP sensors within the assembly. The APP sensors 1 and 2 are potentiometer type sensors each with 3 circuits:

The APP sensors are used to determine the pedal angle. The PCM provides each APP sensor a 5-volt reference circuit and a low reference circuit. The APP sensors provide the PCM with signal voltage proportional to the pedal movement. Both APP sensor signal voltages are low at rest position and increase as the pedal is applied.

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