VOLVO
AUM-4BFF - Control module. Internal program fault. Permanent fault
System
Audio Unit Module (AUM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007)
Show models by year and engine (4)
What does this fault code mean?
The audio control module (AUM) has registered that something went wrong when new software was downloaded. The fault is present now and shows that the module's program is incomplete or faulty. It is normally corrected by downloading the software again.
Possible causes
- Fault when downloading new software
- Internal program fault in the audio control module (AUM)
What you can do
- 1Have a workshop download new software to the audio control module (AUM)
- 2After the download, check that the dimmer, steering wheel buttons and phone function work
- 3Clear the code only when the download is complete, and check that it does not return
Symptoms you may notice3
- The dimmer control (rheostat) does not work
- The steering wheel buttons do not work
- The mute during phone calls does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.