CAN timeout of MBS master (MBSM)
If other ECUs communicationg on the same CAN bus have recorded CAN bus failures then it is not likely that it is a problem with this particular TCC . Instead look for faults in the cable harness or MBSM power supply. Check CAN bus wires, connectors and terminals for mechanical damage. Measure the CAN bus wiring for short circuit or broken wires. Be aware that it could be an intermittent fault that appears due to vibrations or other circumstances.
What you'll see
No driver-visible symptom recorded.
System reaction
The TCC will finish any ongoing operation (like opening or closing) and then stop and wait for CAN communication to start. It will keep following workshop button comands.
Diagnostic depth
Communication with the MBSM has timed out (communication interrupted)
- Faulty MBSM or TCC - Faulty brown CAN bus - MBSM or TCC disconnected from the brown CAN bus, for example due to: -- broken CAN wiring -- the CAN bus wires have been disconnected while the TCC or MBSM was powered up during maintenance work or similar. - Power supply failure of MBSM while the TCC was powered up and in operation.