Corvette V8-6.0L VIN U (2005)
Accelerator Pedal Position Sensor: Description and Operation
ACCELERATOR PEDAL POSITION (APP) SENSOR
The accelerator pedal contains 2 individual APP sensors within the assembly. The APP sensors 1 and 2 are potentiometer type sensors each with 3
circuits:
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A 5-volt reference circuit
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A low reference circuit
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A signal circuit
The APP sensors are used to determine the pedal angle. The ECM provides each APP sensor a 5-volt reference circuit and a low reference circuit. The
APP sensors provide the ECM with signal voltage proportional to the pedal movement. The APP sensor 1 signal voltage at rest position is less than 1
volt and increases to above 2.5 volts as the pedal is actuated. The APP sensor 2 signal voltage at rest position is near the 4 volts and decreases to less
than 1 volt as the pedal is actuated.
