I have had my answers, by finally removing the red cables provided, and testing all choice one by one, the first one was the correct one.

Hi,

I can't find the ECU model that my van have does anybody knows where to find this info ?
I tried to look at underneath the dashboard or close to the engine compartment, but no ECU, do you know where it's mounted ?

My ducat' is the old version with the 4 lines logo fiat

cheers