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.
Under normal driving conditions, the electronic brake control module (EBCM) monitors the steering angle sensor inputs to see if the steering wheel is moving. If the steering wheel is not moving for a set period of time, the EBCM assumes the vehicle is going in a straight line. At this point, the EBCM looks at the steering angle sensor inputs and considers the degree angle to be zero. This is called the offset value.
Steer angle centering is the process by which the EBCM calibrates the steering sensor output so that the output reads zero when the steering wheel is centered.