Inclination Sensor Module Alarm (BBS-Is) (XC90 Structure Week 201128-)
If the vehicle is equipped with a vehicle inclination sensor, the sensor is integrated in the siren. The vehicle inclination sensor reacts to changes in the angle of lean of the vehicle and transmits a signal to the Rear electronic module (REM). While the vehicle inclination sensor is mounted in the siren it is counted as a separate unit. If the vehicle inclination sensor indicates that the vehicle is being lifted the master control module must send an activation signal to the siren. In this case the siren cannot trigger an alarm by itself.
The siren is powered via a fuse from the central electronic module (CEM) The siren is grounded in the engine compartment.