MultiECUScan 2021 editions enforce:

: Select the COM port assigned to your device in Windows Device Manager.

Once the hardware is configured in Windows, you must tell the software where to look:

: Right-click the Start button and select Device Manager .

Optimizing Multiecuscan ELM327 Port Settings (2021 Guide) Setting up a Multiecuscan (MES) system for your Fiat, Alfa Romeo, or Lancia can sometimes be a headache, especially when you hit that dreaded "Connection Failed" message. As of 2021, most connection issues boil down to simple port and baud rate mismatches.