In flying the 206 since 1982, I have never seen a freewheel chip detector that is wired to the system. There is not even a checklist item on the preflight that says "Pull it out and look at it", which is an indication of how rare it would be to have anything go wrong with it.
However, I would ALWAYS pull the plug and wipe it on a white cloth and look at the residue - very rarely would there even be a whisker, usually just a grey sludge.