Update: the problem seems to be solved, today I tried again and it worked. I think that the connector of the adapter has a poor quality construction, so it is necessary to push it well on the car connector.

Thank you in any case!

Good morning, I am using MES 3.7 and an ELM 327 + A1 adapter to connect to the electric steering of a 2011 Lancia Delta 1.4 Multiair. When I try to connect, I receive the following message: CONNECTION FAILED ELM 327 -> ECU Connection failed! Check your cable and serial port settings! Please note tha...