Accelerator Pedal Position (APP) Sensor

The APP module is mounted on the accelerator pedal assembly. The APP is actually 2 individual accelerator pedal position sensors within one housing. Two separate signal, ground, and 5 volt reference circuits are used to connect the APP to the engine control module. The APP sensor 1 voltage should increase as the accelerator pedal is depressed, from below -3 volts at 0 percent pedal travel to above 4 volts at 100 percent pedal travel. The APP sensor 2 should increase from about -3 volts at 0 throttle to 2-1 at 100 percent travel.