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Home >> Chevrolet >> 2003 >> SSR Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 5.3L - Introduction >> Description and Operation >> Throttle Actuator Control (TAC) System Description >> Accelerator Pedal Position (APP) Sensor

Accelerator Pedal Position (APP) Sensor

The accelerator pedal assembly contains 2 individual accelerator pedal position (APP) sensors within the assembly. The APP sensors 1 and 2 are potentiometer type sensors, each with the following circuits:

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