Acceleration Sensor, Car Body
There are three acceleration sensors on the car body. Two are under the headlamps and one is behind the left-hand wheel arch in the cargo compartment. The acceleration sensors are supplied with 5 V by the suspension module (SUM). When the vehicle is stationary, the output signal from the sensor is approximately 2.0 V. When there is vertical movement the signal will oscillate around 2.0 V; the greater the movement the greater the deviation. The control module assesses the information from the acceleration sensors and then controls the damping forces to the car body depending on the selected driving mode.
The acceleration sensors are installed with the connector turned upwards and are fixed in position. Otherwise movement could result in incorrect values, resulting in poor cornering characteristics for example.
There are diagnostics for the acceleration sensors.