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Home >> BMW >> 2005 >> 745Li >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Intelligent Safety Integration System - Overview >> Intelligent Safety Integration System (ISIS) >> System Overview >> Front Door Satellite, Left/Right (STVL/STVR) >> Sensor System
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Sensor System

A pressure sensor is integrated into the front door satellite. In the event of a collision, penetration of the door outer skin reduces the volume of the door, which leads to a significant rise in pressure.

The relative pressure change and rise in pressure evaluated over time are important factors for the crash evaluation.

The ignition stages are diagnosed and controlled by the igniter ICs. The self-diagnosis of the trigger circuits during the pre-drive check and in normal operation is the same for all satellites. (See SASL  )