Circuit/System Description

Steering angle centering is the process which the electronic brake control module (EBCM) calibrates the steering angle sensor so that it reads 0 when the steering wheel is centered. The data from the yaw rate sensor, lateral accelerometer and wheel speed is used under normal circumstances when the steering angle centering occurs after approximately 10 seconds of driving in a straight line on a fairly level surface at a speed greater than 7 mph/10 kph.

The usable output voltage range for the lateral accelerometer and yaw rate sensors is 0.25-4.75 volts. The scan tool will report zero lateral acceleration or yaw rate as 2.5 volts with no sensor bias present. The sensor bias compensates for sensor mounting alignment errors, electronic signal errors, temperature changes, and manufacturing differences.