Ride Height Sensor: Description and Operation

The electronic height sensor is a rotary style design that uses an internal hall effect device to determine ride height. These sensors will indicate conditions of above trim, trim and below trim to the control module. The three sensors are located at the LH front, RH front and RH rear of the vehicle. Each one of the sensors measures the actual difference between known reference points so that the control module can respond to variations in ride height. In the parking mode, additional height positions allow the system to accurately determine if an obstruction was encountered during a parking maneuver. In the driving mode, variations in road surfaces are sensed by checking road wheel vertical speed and vertical travel. If the average wheel speed and travel is above a predetermined level, the shock absorbers are switched to the firm position. This reduces the chance of grounding out of the subframe when traveling over bumpy road surfaces.