Volvo XC70 2004 instrument cluster software modification

[VolvoXC70]

Hello.

I have a little project going where i want to use a webasto diesel heater outside of the vehicle. For this project i have the webasto itself, a CEM, DIM and a Steering wheel module (SWM). All of these parts are from the same donor car.

So far i have wired everything on a bench and i am able to communicate over CAN with all control modules. I understand that there is probably other ways to accomplish what i am trying to do here with the help of advanced equipment to inject the correct CAN messages in order to get the webasto working and i might look into that later.

My issue now is that with all control modules wired i should in theory be able to start the webasto once its hooked up to diesel and coolant but i keep getting the "brake failure, pull over" warning in the DIM info display which makes it impossible to scroll to the webasto timer settings and direct start function. This is done with the scroll wheel and read button on the turning lights indicator stalk under normal operations.

The only way i see it possible to override this without software modification would be to actually wire a ABS unit into the system but that also means i would have to get all the correct values for the ABS not to trigger any faults which is not feasible for a bench setup.

I have the DIM Eeprom and flash dump read with Carprog. Is it possible to modify the file and delete the brake failure warning? I have attempted something similar before on a different DIM and although i ended up with the same file size (128kb) after i wrote it to the DIM it became unresponsive and it was not possible to either read the new file or write a new one which basically bricked that DIM and it was used for spares. Maybe it was a checksum error?

Can anyone help me out here with some information on how to proceed or maybe even modify the file for me? I have attached both the EEprom and flash file. I have to add that the flash file has the swedish language package, brake failure means "bromsfel" in swedish. I can locate exactly which line of code contains the message if needed.