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