Circuit/System Description
WARNING: This page is about a different car, the 2008 GMC Yukon XL and 2008 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 ignition voltage of 12 volts to the yaw rate sensor/lateral accelerometer sensor. The sensor supply voltage is monitored via an internal feedback circuit to the EBCM microprocessor.