VOLVO
BCM-U012587 - Failed communication with multi-axial acceleration sensor module. Bus/message error. Message missing
System
Brake Control Module (BCM)
Volvo models this fault code applies to
Applies to the following models:
1 modelXC90 (2003–)
What does this fault code mean?
The brake control module (BCM) receives no signal, or an incorrect signal, from the AYC sensor, which contains the sideways movement, acceleration and tilt sensors used by the stability system. The code only applies to cars with DSTC and means the stability functions are switched off.
Possible causes
- Contact resistance in the connections
- Open circuit in the wiring between the brake control module and the AYC sensor
- AYC sensor not connected
- Internal fault in the AYC sensor
What you can do
- 1Check the connectors at the brake control module and the AYC sensor for contact resistance and oxidation
- 2Road test the car and then read the code status without switching the ignition off; if the code has become intermittent, poor contact is the likely cause
- 3Check the wiring for breaks, and that the AYC sensor is correctly fitted and its bracket is secure
- 4If the wiring is intact and the sensor is correctly fitted, a workshop needs to replace the AYC sensor
- 5The brake and stability systems are safety-critical, so have a workshop carry out all work on the sensor
Symptoms you may notice4
- General warning lamp on
- Traction control does not work
- Stability function does not work
- Anti-skid function does not work
What the fault can affect1
- Traction control, stability control and dynamic stability control (AYC) are disabled
General guidance for car owners. Diagnosis on the car can point to a different cause.