Foxwell NT510 OBDII handheld scanner is tested ok on almost all Fiat models to perform the diagnostic function including: ECU info, read codes, erase codes, live data and active test etc, as well as special function for a part of Fiat models. Please be informed, because not all Fiat models are supported to perform all of the above-mentioned functions, you are supposed to check the .pdf file and enter model to search.
This pdf file contains 75 pages, after enter your car model or year you will be taken to. http://www.foxwelltool.co.uk/upload/pro/201608/foxwell_nt510_fiat_functionlist_v1.00.pdf
Following screenshots display a little part of Fiat models with working special function (Since Foxwell NT510 performs special function on many Fiat models, I can't paste all here.)