ok update
So i got a complete harness for the navigation and i managed to plug it all correctly and start up the navigation outside the vehicle, the problem i am facing now is the Green boxed message "Secure" apearing on the screen i can get in the info menus but not more
As far as i know the unit has to be reprogram to my cars anti theft system with a new code now i recognizes its from another car with wrong code..
I called more than 10 nissan Dealers and none had a clue on what it has to be done :/
they all told me to go by and have it checked but i am not on mood to give another 500 euros or so just to check for something that might not work at all!
So does anyone know if it simply need to be reprogrammed to my vehicles anti theft system or to completely remove the code validation within the navigation unit ?
Thanks !