Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ICM-U018400

Condition
The infotainment module (ICM) controls communication with the integrated audio module (IAM).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Communication error with the Integrated Audio Module (IAM).

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
- Internal fault in integrated audio module (IAM).
- No integrated audio module (IAM).
- Damaged fuse.
- Open-circuit in the MOST cable.

Fault symptom[s]
- Radio does not operate
- CD player does not function
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.