If you are talking about the pick up coil that is part of the stator assembly, then you check the resistance across it with an ohmmeter. I don't know what the resistance should read off hand, but you can find it in a repair manual. If you are talking about the stator itself, then, you check resistance across it with an ohmmeter, just like you would the pick up coil. I think you would be talking about the pick up coil, at least that's what I call it.