VOLVO
AUD-B1A0449 - Speaker #4. System Internal Failures. Internal electronic failure
System
Audio Module (AUD)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The audio control module (AUD) measures the DC voltage on the outputs to the right rear door speaker. If the difference between the outputs becomes too large, the code is set. The fault most often lies in the module, but a short to supply voltage or to ground in the wiring can give the same symptoms.
Possible causes
- Damaged audio control module
- Short circuit to supply voltage
- Short circuit to ground
What you can do
- 1Check whether similar codes are stored for the other speakers, since a shared fault is then likely
- 2Check the connectors at the module and the speaker for contact resistance, play and oxidation
- 3Visually inspect the wiring between the module and the speaker and replace it if damaged
- 4Check the module and the speaker with diagnostic equipment and replace the faulty part
Symptoms you may notice2
- No sound from the right rear door speaker
- Front and rear parking assistance does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.