VOLVO
DDM-B100C11 - External rearview mirror with automatic dimming. General Electrical Failures. Circuit short to ground
System
Driver Door Module (DDM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS60 (2011–), V60 (2011–), V60 Cross Country (2015–), XC60 (2009–)
Show models by year and engine (4)
What does this fault code mean?
The driver door module (DDM) powers the driver's side external mirror with automatic dimming. The fault is stored when the module detects that the output current is too high, which in this case means a short to ground in the cable. Auto-dimming then does not work.
Possible causes
- Signal cable to the driver's side auto-dimming mirror short-circuited to ground
- Moisture and/or oxidation in connections
What you can do
- 1Read out and note the fault code, clear it, then take a test drive to see if auto-dimming works
- 2Check the connections to the driver's side mirror for moisture and oxidation, and clean them
- 3With ignition off, use a multimeter to confirm the signal cable to the mirror has no contact with ground (body). Replace the cable if it is damaged
- 4Check that the ground lead between the mirror and the door module is intact and firmly connected
- 5If the fault remains, have a workshop replace the driver's side mirror
Symptoms you may notice1
- Auto-dimming in the door mirror does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.