Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ICM-U01934A

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 Remote Digital Audio Receiver (RDAR/DABM) 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:
- The Infotainment Control Module (ICM) has registered that the Remote digital audio receiver (RDAR/DABM) is not on 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
- The Remote digital audio receiver (RDAR/DABM) is not valid according to the approved list stored in the Central electronic module (CEM).
- Software not downloaded at replacement of control module.
- Failed or incomplete software download to control module.

Fault symptom[s]
- Digital Radio; No Functionality
Hint: The following only applies to S80 (07-), V70 (08-) and XC70 (08-) manufactured before week 35, 2008: If the trouble symptom is Audio other/Audio unit (complete) not working, Audio other/Display on audio unit not working, Audio other/Other audio problems or Radio/Not working, check and troubleshoot according to: TIE TJ 18609.