Diagnostic Trouble Code (DTC) Information IAM-B121C13
Condition
The Integrated Audio Module (IAM) checks the signal in the signal cable from the internal hard disk.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Signal missing.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition switch position II.
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
- No or interrupted communication with the integrated hard disk.
- Damaged integrated audio module (IAM).
Fault symptom[s]
- Navigation/Voice guidance does not work
- Navigation/Locations cannot be stored/disappears
- Navigation/Does not work
- Navigation/Other navigation problems