Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TRM-U300042

Condition
The trailer module (TRM) checks internal functions in the control module.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Internal components do not work.
- Incorrect value runs longer than 0.5 seconds.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Start-up of the control module.

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
- Damaged Trailer module (TRM).

Fault symptom[s]
- Faulty function on trailer lamps