Circuit/System Description
WARNING: This page is about a different car, the 2012 GMC Yukon XL and 2012 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
The electronic brake control module (EBCM) supplies a 12 volt reference to the yaw rate sensor/lateral accelerometer sensor. The sensor supply voltage is monitored via an internal feedback circuit to the EBCM microprocessor.