As a current to the valves, the valves do not use current, I briefly explain to you great features how the magnet captor works, this detects the turn of the Sigual crosses from the interruption of a magnetic field, and thanks to this send a signal towards the coils so that they shoot the spark in the spark plug that corresponds to the time, this magnet gives a spark signal and in some cases the flow Your vehicle, in most Nissan this spark function is also generated by flijometro by telling the computer that if there is air and that the engine is running, they are usually hot thread you can take it out and see that the thread or burned is not cut, but the magnet captor is the one who commands the spark in Nissan and that is what is not spoiled, check it and keep it informed.