Circuit/System Description
WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
The electronic brake control module (EBCM) supplies ignition voltage to the steering angle sensor and the yaw-rate/lateral sensor. The EBCM receives serial data messages from both the steering angle sensor and the yaw rate/lat sensor.
The steering angle sensor serial data message to the EBCM represents the steering wheel degree of rotation. The EBCM utilizes this signal to calculate the driver intended driving direction.