VOLVO
IAM-B1A0412 - Speaker #4. General Electrical Failures. Circuit short to battery
System
Integrated Audio Module (IAM)
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 IAM unit monitors the signal to the speaker in the right rear door and has registered that it is too high. The signal wire has a short circuit to voltage, so the speaker produces no sound and the parking assistance does not work.
Possible causes
- The signal wire to the speaker in the right rear door is short-circuited to voltage
What you can do
- 1Check that the fuses for the speakers are intact
- 2Switch the ignition off and look at the connectors at the module and at the speaker in the right rear door for contact resistance, play and oxidation
- 3Look for chafing on the signal wire to the speaker in the right rear door and at spots where it may have touched another wire
- 4Use a multimeter to check that the signal wire has no contact with voltage
- 5After the work, check that the sound from the speaker in the right rear door works and that the fault code does not return
Symptoms you may notice2
- No sound from the speaker in the right rear door
- Front and rear parking assistance does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.