Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code information ICM-6C7A

Condition




The central electronic module (CEM) stores the serial number of each control module of the infotainment system. Upon start, the stored numbers are compared to the control modules' serial numbers. If the numbers do not correspond, the control module in question is blocked and the function is non-operational. The function to block non-valid control modules is called security on MOST.
The infotainment module (ICM) checks whether the integrated audio module (IAM) is on the valid list stored in the central electronic module (CEM).
The diagnostic trouble code is generated if the infotainment module (ICM) registers that the integrated audio module (IAM) is not on the valid list.
The diagnostic trouble code (DTC) can be diagnosed with the ignition on for at least 12 seconds, battery voltage greater than 11 V and security on MOST activated.

Substitute value
- Nothing.

Possible source
- Replacement of invalid integrated audio module (IAM) according to the valid list stored in the central electronic module (CEM).
- No software download on replacement of integrated audio module (IAM).
- Failed or incomplete software download to integrated audio module (IAM).

Fault symptom[s]
- Audio system inoperative.