Important: The brake pedal position sensor receives a low reference signal and a 10-volt reference signal from the BCM. Whenever the brake pedal is applied, the brake pedal position sensor applies a variable voltage signal to the BCM through the stop lamp switch signal circuit.

Brake pedal position sensor calibration must be performed after the brake pedal position sensor or electronic brake control module (EBCM) or body control module (BCM) have been serviced. The calibration procedure will set the brake pedal position sensor "home" value. This value is used by the EBCM to determine the action of the driver applying the brake system and to provide this information to the vehicle subsystems via the class 2 communication bus.

1. Turn ON the ignition, with the engine OFF.
2. Install a scan tool, select the proper vehicle and options.
3. Navigate to the BCM menu item.
4. Select the special functions menu item.
5. Select the BPP sensor calibration procedure and follow the directions displayed on the screen.