VOLVO
DDM-B108786 - LIN Bus "A". Bus Signal / Message Failures. Signal invalid
System
Driver Door Module (DDM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2011–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–)
What does this fault code mean?
The driver door module (DDM) receives a signal over the LIN bus from the rear door modules or the switch panel that is not valid. The fault is stored when the signal is faulty, and several door functions may then stop working.
Possible causes
- Communication interference on the LIN bus
What you can do
- 1Check that the fuses are intact. Fuse positions are usually shown on the cover of the fuse box
- 2Test which door functions work using the buttons and controls, and note which do not
- 3If all functions from one rear door are missing, check the connectors in that door for oxidation and loose contacts
- 4If the fault comes and goes it may be intermittent, so also check the wiring for chafing
- 5If several functions keep working poorly, have a workshop check the LIN bus
Symptoms you may notice5
- Electric window does not work or works poorly
- Central locking does not work, including with the button in the door panel
- Child lock does not work
- Electric door mirror adjustment does not work
- Door mirror folding does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.