Circuit/System Description

WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The electronic brake control module (EBCM) supplies a 5 volt reference voltage to the yaw rate sensor/lateral acceleration sensor and the steering angle sensor. The steering angle sensor supplies input circuits to the electronic brake control module (EBCM) from the Digital Phase A, Phase B and 1 Analog signal circuit to determine the steering wheel angle. The analog signal is used to calibrate the steering angle sensor. The actual steering angle sensor position is determined by Phase A and Phase B signals which toggles between high and low when the steering wheel is turned. The two input signals Phase A and Phase B are approximately 90 degrees out of phase. Once calibrated, the EBCM dynamically interprets the relationship between the Phase A and Phase B inputs, which determines the rotation and the position of the steering wheel.