Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ICM-6C75

Condition




The serial number for each control module in the infotainment system is stored in the central electronic module (CEM). The stored numbers are compared with the serial numbers of the control modules at start up. If any number does not correspond, that particular control module is blocked and the function is not available. The blocking function for non-approved control modules is designated security on MOST.
The infotainment control module (ICM) checks whether the CD module (MP2) is in the approved list stored in the central electronic module (CEM).
Diagnostic trouble code (DTC) ICM-6C75 is stored if the infotainment control module (ICM) registers that the CD module (MP2) is not in the approved list.
Diagnostic trouble code (DTC) ICM-6C75 can be detected when the ignition is on for at least 12 seconds and the battery voltage is > 11 V and security on the MOST network is activated.

Substitute value
- None.

Possible source
- Replacing a CD module (MP2) which is not approved in the list stored in the central electronic module (CEM)
- Software not downloaded when replacing the CD control module (MP2)
- Failed or incomplete software download for the CD module (MP2).

Fault symptom[s]
- The CD player does not work
- The CD changer does not work.