Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ICM-U01984A

Condition
The serial number of 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 the numbers do not correspond, that particular control module is blocked and the function is not available.
The infotainment control module (ICM) checks whether the phone module (PHM) is in the approved list stored in the central electronic module (CEM).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Phone Module (PHM) is not in the approved list.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition position II for at least 12 seconds.
- Battery voltage higher than 11 V.
- Infotainment Theft Protection (ITP) activated.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- None.

Possible source
- Defective control module.
- Software not downloaded at replacement of control module.
- Failed or incomplete software download to control module.

Fault symptom[s]
- Telephone not working
- Telematics; No Functionality