TUTO : Reset REJ & reinstal older GPS Firmware with your original DVD
When your DVD copy "AG" does not work (error reading disk) and you want to start with the official DVD, the player tells you that the version does not match.
After a long search and a boost of a JEEP tecnicien , I could reinstall my official version on my REJ/REC
I thought you to enjoy !
If you want to reinstall the previous version:
1 - Start the vehicle and turn on the REJ/REC
2 - Insert the older Official DVD
3 - Select FM/AM (REC Version) or BAND (REJ Version)
4 - Select NAV
5 - Simultaneously press the buttons 2 and 6 and hold down
6 - Press and hold down CANCEL
7 - DIAGNOSIS menu appears
8 - Go to: unit check> debuging> Force Download> Press yes.