Circuit/System Description

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.