Circuit Description
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
The Accelerator Pedal Position (APP) sensor is mounted on accelerator pedal assembly. Sensor contains 3 individual APP sensors within one housing. There are 3 separate signal, ground and 5-volt reference circuits connected to APP and Throttle Actuator Control (TAC) modules. Each sensor has a unique functionality:
- The APP sensor No. 1 signal increases as accelerator pedal is depressed from less than 1.1 volt (zero percent with pedal at rest) to greater than 2.1 volts (100 percent pedal travel).
- The APP sensor No. 2 signal decreases from greater than 3.9 volts (zero percent pedal travel) to less than 2.9 volts (100 percent pedal travel).
- The APP sensor No. 3 signal decreases from greater than 3.2 volts (zero percent pedal travel) to less than 3.1 volts (100 percent pedal travel).
Observe that signal circuits for APP sensor No. 2 and APP sensor No. 3 pull up to 5 volts and APP sensor No. 1 circuit pull to ground within the TAC module. DTC will set APP sensor No. 3 disagrees with APP sensor No. 1 by greater than 13 percent and APP sensor No. 3 disagrees with APP sensor No. 2 by greater than 13 percent and conditions met for less than one second.