Thank you for the post.
The manufacture year is 1994.
I have downloaded the application "IAW Scan 2" version v0.82.
Is there any newer version?

The 3pin adapter that I use is homemaded by me and I putted no resistance at all within.
Is the 3pin adapter correct?

I try to connect to a Fiat Cinquecento engine code 1170A1046 but the system hang up.
I use interface OBDkey 1.4 with 3pin adapter. Pinout to 16pin female such in attachment picture.
I send also the log files and the foto of engine electronic unit IAW 6F.S0.

Please for help