VOLVO
IAM-B1D7911 - Microphone Input. General Electrical Failures. Circuit short to ground
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 integrated audio module (IAM) has detected that the signal from the microphone is too low on the signal cable. It most often shows up as the microphone not working and the other party not hearing you during a hands-free call.
Possible causes
- Signal wire shorted to ground, running between the audio module and the microphone
- Short circuit between the signal cables to the microphone
What you can do
- 1Read the code, clear it and make a test call on hands-free to see whether the fault comes back
- 2Check that the fuses for the audio system and phone are intact; the location of each fuse is in the owner's manual or on the cover of the fuse box
- 3Check the connectors at the microphone and the audio module for loose or corroded contacts
- 4Use a multimeter to check that the microphone signal cables are not in contact with ground (the car body) or with each other
- 5If the fault remains, have a workshop check the integrated audio module (IAM) and the microphone with diagnostic equipment
Symptoms you may notice3
- The microphone does not work
- The other party cannot hear you during hands-free calls
- The other party cannot hear you at some times or all the time
General guidance for car owners. Diagnosis on the car can point to a different cause.