Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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 Rear electronic module (REM) 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.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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