VOLVO
DDM-B100C15 - External rearview mirror with automatic dimming. General Electrical Failures. Circuit short to battery or open
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 output current from the module is too high, which in this case can be caused by a short to voltage or an open cable. Auto-dimming then does not work.
Possible causes
- Cable to the driver's side auto-dimming mirror short-circuited to voltage or open
- 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 cable has no contact with plus and is not broken. Replace the cable if it is damaged
- 4Check the voltage cable between the mirror and the door module for chafing and damage
- 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.