Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TRM-E003

Condition
The trailer module (TRM) compares its configuration ID with the signal configuration transmitted on the control area network (CAN) by the central electronic module (CEM). If the configuration IDs do not correspond the fault code is stored. The diagnostic trouble code (DTC) is also stored if the communication between the trailer module (TRM) and the central electronic module (CEM) is interrupted.

Note! In the event of an open-circuit in both the control area network (CAN) cables, it is not possible to communicate with the trailer module (TRM). Therefore it will only be possible to read off the diagnostic trouble code (DTC) if this type of fault is intermittent. When the diagnostic trouble code (DTC) is stored, the trailer module (TRM) responds to the diagnostic command, however normal control area network (CAN) communication does not work. ("Expulsion mode")

Substitute value
- None.

Possible source
- Incorrect CAN configuration ID (the node is not intended for this car, for example a used control module with other software/hardware)
- Open-circuit in the control area network (CAN) wiring between the trailer module (TRM) and the central electrical module (CEM).

Fault symptom[s]
- Faulty function of trailer lamps.