Roverlike

Ring I am talking about have nothing to do with rotary coupler. This is ring around ignition barrel where you insert the key and it is directly connected to 5AS alarm box. When key is inserted into ignition barrel ring starts working, inducing fob to emmit signal needed for passive immobilisation to be stopped. When engine is started signal is no longer needed since passive immobilisation is not active. That is all to it. No other purpose of that ring.