VOLVO
IAM-4001 - Microphone input. Signal missing
System
Integrated Audio Module (IAM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
The integrated audio module (IAM) monitors the signal from the microphone and has received no signal at all. The microphone therefore does not work. The cause is a break in the signal wire or a damaged microphone.
Possible causes
- Open circuit on the signal wire between the module and the microphone
- Damaged microphone
What you can do
- 1With the ignition off, disconnect the microphone connector and check the connectors for contact resistance, play and oxidation
- 2Follow the wire between the microphone and the module and look for breaks, chafing or loose joints
- 3Use a multimeter to check that the signal wire is not broken
- 4If no fault is found in the wire, have a workshop replace the microphone
- 5After the work, check that the microphone works and that the fault code does not come back
Symptoms you may notice1
- The microphone does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.