Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ICM-U001000

Condition
The control modules transmit and receive information via a standardized serial communication method - CAN (Control Area Network). The diagnostic trouble code (DTC) is stored if the control module registers serious interference on the low speed network (CAN communication blocked).

Note! In the event of system communication problems, it is not possible to communicate with the infotainment control module (ICM). Therefore it will only be possible to read off the fault if it is intermittent.





Substitute value
- Control module shuts itself off ("bus-off").

Possible source
- Short-circuit between the control area network (CAN) wiring.
- Open-circuit in the control area network (CAN) wiring.
- Internal fault in the Infotainment control module (ICM).
- Internal fault in another control module in the same part of the control area network (CAN).

Fault symptom[s]
- Infotainment functions do not work
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.