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.
Sensor module (Only DSTC)
The sensor module is installed under the right-hand front seat and contains two to four sensors, depending on which of the three versions is installed. The information from the sensor module is used for stability calculations in the brake control module (BCM). The sensor module for 2 wheel drive cars contains a yaw angle sensor which measures the yaw angle speed in °/s, and a lateral acceleration sensor which measures lateral acceleration in m/s2 . The sensor module all-wheel drive (AWD) also contains a yaw angle sensor and lateral acceleration sensor as well as an acceleration sensor which measures longitudinal acceleration in m/s2 .
The XC90 also has a tilt sensor in the sensor module. The tilt sensor gauges the tilt rate in °/s. The sensor is installed using a new bracket, turned 90°.
The sensor module communicates with the brake control module (BCM) via an internal control area network (CAN).
The supply voltage to the sensor is 12V and is connected to ground.
There are diagnostics for the sensor module.
When replacing the sensor module, the brake control module (BCM) must be calibrated according to the information in VIDA vehicle communication or manually according to the test drive.
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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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