The brake pedal position (BPP) sensor receives a low reference signal and a 5-volt reference signal from the electro-hydraulic power steering (EHPS). Whenever the brake pedal is applied, the brake pedal position sensor applies a variable voltage signal to the EHPS through the BPP sensor signal circuit. Brake pedal position sensor calibration must be performed after the brake pedal position sensor or EHPS system have been serviced. The calibration procedure will set brake pedal position sensor home value. This value is used by the EHPS to determine the brake pedal position and the brake pedal rate. These two outputs are provided to the hybrid control module (HCM) via GMLAN.

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.

Important: Make sure the brake pedal is not depressed before sending BPP sensor calibration command.

3. Navigate to the Special Functions screen on the scan tool and select BPP Sensor Calibration in order to perform the brake pedal position sensor calibration.