VOLVO
TRM-U030000 - Internal Control Module Software Incompatibility. General Failure Information. No sub type information
System
Trailer Module (TRM)
Volvo models this fault code applies to
Applies to the following models:
6 modelsS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The tow hitch control module (TRM) has a configuration ID that is not the same as the one the central electronic module (CEM) sends out on the CAN network. The cause may be a second-hand control module fitted, or an interrupted communication between the modules. Incorrect operation of the trailer lamps may follow.
Possible causes
- Incorrect configuration ID, for example if the module is second-hand and has different software or hardware
- Break in the CAN wiring linking the tow hitch module with the CEM
What you can do
- 1Check whether the tow hitch control module is second-hand, and if so that it has the correct software for the car
- 2Have a workshop download the correct software to the tow hitch control module and reprogram it
- 3Check the connectors and wiring between the modules for breaks and damage
- 4Clear the code only once the work is done, and check that it does not return
Symptoms you may notice1
- Trailer lamps do not work correctly
What the fault can affect3
- The module stops sending messages on the CAN network
- The module's functions stop working
- The module responds to diagnostic commands, but normal CAN communication does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.