VOLVO
DDM-B108788 - LIN Bus "A". Bus Signal / Message Failures. Bus off
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) registers that the signal on the LIN bus is missing. Door functions that are controlled over the bus, such as the window lifts and central locking, then do not work.
Possible causes
- Open circuit in the communication cable
- Communication cable in contact with supply voltage
- Oxidation, contact resistance or poor contact in connections
- Short-circuit or open circuit in connections
What you can do
- 1Check that the fuses are intact. Fuse positions are usually shown on the cover of the fuse box
- 2Check the connectors in the doors and on the cable between the door modules for oxidation, loose contacts and damage
- 3With ignition off, use a multimeter to check that the communication cable is not broken and has no contact with plus. Replace the cable if it is damaged
- 4If possible, test several door functions with the buttons and controls to see which work
- 5If the fault remains, have a workshop check the door modules and the bus
Symptoms you may notice5
- Power window does not work at all, or only partly
- 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.