Signals from integrated sensor system
The sensors that were previously accommodated separately in the DSC sensor are now installed in the ICM control unit. The following variables can be recorded with these sensors.
- Longitudinal acceleration and pitch of the road or vehicle in the longitudinal direction
- Lateral acceleration and pitch of road or vehicle in lateral direction
- Rotational speed around vertical axis (yaw rate)
The sensor signals are initially referenced to the sensor housing. However, to be useful to the dynamic driving systems, these variables must be referenced to the vehicle coordinate system. The ICM control unit performs the necessary conversion. A synchronization process is carried out when the ICM control unit is started up during which appropriate correction values are determined and saved.
NOTE:
Calibration of the sensors integrated into the ICM control unit is necessary in the following cases:
The calibration must be performed with the vehicle standing on a level surface in the longitudinal and lateral direction. Terminal 15 must be switched on.
- the ICM control unit has been replaced or
- if requested by the test schedule in the diagnostic system due to a fault code memory entry.
The calibration must be performed with the vehicle standing on a level surface in the longitudinal and lateral direction. Terminal 15 must be switched on.