Door Module, Driver

Door Module, Drivers Door/Passenger Door, TMFA/TMFB





The drivers door/passenger door module is a combination of the door module with the body electrics functions and the front door satellite.
The drivers door/passenger door module controls and monitors the trigger circuits for the door mounted side airbag. The pressure sensor in the door module registers a side impact by measuring pressure increases in the door cavity.





The description below describes only the functions that are relevant to the ASK system. The other functions are described in the section entitled General Vehicle Electrics.
The door modules with the function of the front door satellites are connected to the SGM by the byteflight. The power supply of the satellites is also from the SGM and it is buffered by a storage capacitor. In sleep mode of the byteflight, the power supply of the satellites is deactivated by the SGM. The door functions (FH, ASP, ZV) are sustained by means of a separate terminal 30.
A pressure sensor is integrated in the front door module. The sensor permanently measures the pressure at the door. In the event of a crash, penetration of the door outer skin reduces the volume of the door. This results in a significant pressure rise. The relative pressure change and rise in pressure evaluated over time are the most important factors for the crash evaluation.





Triggering and monitoring of the trigger circuits are similar to the criteria for the B-pillar satellites.