B-Pillar Satellite, Right (SBSR): Notes

The SBSR is located in the right side B-pillar above the seatbelt inertia reel. The SBSL contains a sensor for transverse acceleration only.

The right side B-pillar satellite is responsible for deploying the passenger seatbelt tension limiter, the battery safety terminal (BST) and for operating the fuel pump (EKP).

Fig 1: Identifying Location Of B-Pillar Satellite, Right (SBSR)

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: View Of B-Pillar Satellite, Right (SBSR)

Courtesy of BMW OF NORTH AMERICA, INC.

The satellite SBSR is connected to the SIM via the byteflight. The power supply of the satellites is also from the SIM and it is buffered by the memory backup capacitor.

The voltage supply of the electric fuel pump is by means of a separate terminal 30.

In the sleep mode of the byteflight , the power supply of the SBSR is switched off by the SIM; the operating voltage of the electric fuel pump is unaffected by this.

The "watchdog" function is run by the SIM.

Fig 3: B-Pillar Satellite, Right (SBSR) Circuit Diagram

Courtesy of BMW OF NORTH AMERICA, INC.