from what ive been told by northern if it requires a map unit, ezscan or elevision computer it has the mandatory maintenance option. there are 2 ways you can get faults. if you have the rms board on the front on the 3200 board with the screen and it will only show you the most current fault. (ie irr low from ppu, dol not active, low chc, ect) and with the map unit or ezscan you can access the special features which will show you fault codes which you would have to call northern to translate.
