Trw2scan
From RepairWiki
The software trw2scan is the only freely available tool being able to communicate with airbags ECUs using the TRW2 protocol. This kind of ECUs is found in many cars built by Fiat until the late 90s (Fiat, Alfa Rome, Lancia,...).
The software is used together with script files that define the communication details that are different from car to car.
The usage syntax is: trw2scan scriptfile