Circuit Description

The electronic brake control module (EBCM) supplies 5 volts to the yaw rate sensor/lateral accelerometer. When the vehicle is not moving, or is being driven in a stable, straight line, yaw rate is 0 degrees/second and the yaw rate sensor signal voltage is very near 2.5 volts. This is referred to as sensor bias voltage. Performing a turning maneuver causes the yaw rate sensor signal voltage to increase, or decrease, depending on the direction of the turn. The sharper the turn, the greater the change in signal voltage. Since the yaw rate signal is affected by temperature, the EBCM also monitors a Hz frequency signal from the yaw rate sensor/lateral accelerometer which is proportionate to the approximate temperature of the yaw rate sensor.