Circuit Description
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) applies a ground through the brake pedal sensor reference low circuit to the BPPS. The BCM supplies a 10-volt reference through the brake pedal sensor reference voltage circuit to the BPPS. When the brake pedal is being applied, the BPPS then sends a variable voltage signal through the brake pedal sensor signal circuit to the BCM.