The Toledo type KG has a MIB2 installed, or am I wrong here? I have never needed an FEC code for a MIB2 standard for full link. There are two options, the first is to install the toolbox and then install the patch. You really need a diagnostic device for this because the developer options have to be activated. Or option 2 is to use a full image where CID and CP are also patched. A diagnostic device is only needed for the "Software Management" error.
only for the USB interface you may need a diagnostic device