Circuit/System Description
WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
The electronic brake control module (EBCM) provides a common supply voltage to each digital front wheel speed sensor. As the front wheels spin, each wheel speed sensor produces a digital square wave signal. The EBCM uses the frequency of the wheel speed sensor signal to determine wheel speed.