VOLVO
AUD-U300362 - Battery Voltage. Algorithm Based Failures. Signal compare 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?
This code only needs to be investigated and repaired if it is active in the current drive cycle, has been active for a long time and you are experiencing a loss of function. The audio module compares its system voltage with the one in the central electronic module, and a supply fault can set the code with the ignition on. In other cases the code should be ignored and cleared.
Possible causes
- Supply wire shorted to ground
- Open circuit in the supply wire
What you can do
- 1Check that the audio system fuses are intact and see where they are located in the owner's manual
- 2Check that the battery is in good condition and its terminals are tight
- 3Measure the supply to the audio module with diagnostic equipment and repair the break or short to ground
- 4If there is no loss of function and the code is not active for long, clear it and check that it does not return
Symptoms you may notice3
- The speakers do not work
- The headphones do not work
- The sound from the speakers is muffled, or other audio problems occur
General guidance for car owners. Diagnosis on the car can point to a different cause.