hi I bought a 2018 Ford Focus, version Sync 3 3.4.23188, and I have a problem: the radio keeps turning on and off, there is also a black screen with the words “vehicle network communication error”, I tried to upload a new system from a reformat from a pendrive, but the update does not start.
When you say radio you mean the audio control module, not the Sync APIM with the screen on it?
Does the radio produce audio?