B-Pillar Satellite Left/Right Sbsl/Sbsr

B-Pillar Satellite Left/Right SBSL/SBSR





The SBSL controls and monitors the following trigger circuits:
^ Head airbag AITS 11, left
^ Active headrests left and right
^ Side airbag in rear left door (optional)
^ Seatbelt tensioner, left
^ Seatbelt tensioner, rear left (optional)
The SBSR controls and monitors the following trigger circuits:
^ Front airbag, passenger
^ Head airbag (AITS 11) right
^ Side airbag in rear right door (optional)
^ Seatbelt tensioner, right
^ Seatbelt tensioner, rear right (optional)
The left/right B-pillar satellites are located low in the B pillars in the vicinity of the sill and 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.
Each satellite has an acceleration sensor for longitudinal acceleration and one for lateral acceleration. The sensor provides a voltage as measured variable. This voltage is a measure for the positive and negative car acceleration and it is evaluated in the satellite.
The sensors continuously provide the values determined. The measured values are transferred by the byteflight to the SGM and all the satellites.
When the SGM detects a critical range, the alarm mode is set by means of the synchronization pulse.
The alarm mode places the satellites in a triggerable state. The trigger matrix stored in the satellites activates the necessary actuators depending on the crash severity.
The trigger circuits of the actuators are connected to ignition final stages in the satellites and are ignited by discharging capacitors.
The self-diagnosis of the trigger circuits during the predrive check and in normal operation is the same for all satellites.
Battery cable diagnosis is performed by both satellites. The connection of the monitoring line in the engine compartment is to the SBSL. The connection of the monitoring line to the battery in the luggage compartment is to the SBSR.





A precise description of the battery cable diagnosis can be found in the section on battery cable diagnosis.