VOLVO
SUB-B1A1112 - Speaker #11. General Electrical Failures. Circuit short to ground
System
Subwoofer Module (SUB)
Volvo models this fault code applies to
Applies to the following models:
3 modelsV70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (3)
What does this fault code mean?
Although the code is named short to ground, it applies to the difference in DC voltage between the outputs to the voice coils in the left and right bass speaker. The difference is too large, which may be caused by a damaged subwoofer control module. The bass speakers can then stop producing sound.
Possible causes
- Damaged subwoofer control module
What you can do
- 1Check that the fuses for the audio system are intact
- 2Read out and clear the code, then test-drive with the audio system on to see whether it returns
- 3If the code returns after clearing, the subwoofer control module is probably damaged. Have a workshop replace it
- 4After the repair, check that both bass speakers play sound again
Symptoms you may notice2
- Other audio problems in the car's sound system
- No sound from the bass speaker
General guidance for car owners. Diagnosis on the car can point to a different cause.