Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TRM-U001055

Condition
The control modules communicate with each other for exchange of information in a network via a standardized serial communication procedure - CAN (Controller Area Network). The Central electronic module (CEM) regularly transmits messages on the CAN network. These messages contain information about which signal configuration ID applies to the vehicle. The control modules on the CAN network have the same signal configuration ID so that they can communicate with each other.
The control module compares its configuration ID with the signal configuration transmitted on the control area network (CAN) by the central electronic module (CEM).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The control module's configuration ID differ from the ID that the Central electronic module (CEM) transmits.
- Incorrect value lasts longer than 15 seconds.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Starting the control module's CAN communication.

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
- The control module stops transmitting messages on the CAN network.
- The control module's functions stop working.

Note! When the diagnostic trouble code is generated, the control module answers to the diagnostic commands, however, the normal CAN-communication does not work ("Expulsion-mode").

Possible source
- Incorrect configuration ID (the control module is not intended for this vehicle, for example it is a used control module with different software/hardware).
- Open-circuit in the CAN cables between the control module and the Central Electronic Module (CEM).

Fault symptom[s]
- JV, Trailer lighting/Does not work