The software will not connect unless the virtual COM port is manually configured: Connect your OBD cable to a USB port. Device Manager
Renolink is a popular diagnostic software primarily used for Renault, Dacia, and some Nissan vehicles. Version 1.87 is a widely used release that offers enhanced ECU coverage, DPF regeneration functions, injector coding, and key programming.
Renolink OBD2 interface cable (typically the red USB version).
Right-click it, select , then go to Port Settings > Advanced .