I also add me to this very interesting discussion. Are in possession of a Cock V54 that I have used it several times in serial without problems on EDC16C39, EDC16C34, Marelli MJET 70CV and some other. I tried to do a reading in the BDM with a EDC16C39 taken at the belly-up just for this purpose but no, I have not succeeded. To be thorough, I tried the same ecu with a BDM100 clone, and I have had no problems in reading, so I guess that is my cock to have some problem in the BDM. I attach the photos and am hoping for some advice.
Hello
Galletto_V54.jpg