Thanks for the help! This helped me a little bit in the search for the solution to my problem.
The problem i´m having is that i couldn't access the control module from dis/gt1, but after jcorreanyc help i quickly drove to the breakers and picked up a "new" module from a slightly newer car, i can now access the module but think i have to do a bit more work in dis to hopefully get it to work!
If anyone has done this in dis i would me more than happy to know how!

My problem solved a while ago!
I took the control unit of once more and noticed that the wiring connectors had a lot of corrosion on them, cleaned them and sprayed some electrical spray on them and after that it has worked perfect! no error codes, changed the oil in the transfer case and had no problem to reset the transfer case from DIS/GT1.
The 4x4 now works perfect in the snow!