VOLVO
ICM-6C79 - Infotainment control module (ICM) not approved. Faulty signal
System
Infotainment Control Module (ICM)
Volvo models this fault code applies to
Applies to the following models:
6 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013), XC90 (2003–)
What does this fault code mean?
ICM checks its own serial number against the register of approved units kept in the CEM. If it does not match, ICM itself is blocked and several infotainment functions stop. The code is set when ICM finds itself absent from the register, which most often follows a replacement where the software was not loaded.
Possible causes
- Replacing the infotainment control module with a unit the CEM register does not approve
- Software not downloaded when the infotainment control module was replaced
- The software download failed or was incomplete
What you can do
- 1Read the fault code, clear it and drive the car to see whether it returns
- 2If the infotainment control module was recently replaced, check that software was downloaded with the change. This is done by a workshop
- 3Check that the connectors to the infotainment control module are fully seated and not oxidised
- 4If the fault remains after the software download, the infotainment control module may need replacing. Have a workshop decide this
Symptoms you may notice1
- Several infotainment functions do not work
General guidance for car owners. Diagnosis on the car can point to a different cause.