Re: Knock sensor resistance

[orin@netcom.com (Orin Eman)]

> Hi, Piotr. I've checked it for you: it has three terminals and shows an open
> circuit between each pair in each polarity. Now you've got me puzlled! I 
> thought it was an analogue switch, or may be a piezo electric transducer. 
> I.e. something with a resistance. It apears that this is an ON-OFF switch.
> Hmmmm....

I believe it's just a piezo-electric microphone...  very high impedance,
the three connections are two to the transducer and one to an internal shield.
(At least this is what the Bentley implies.)  

Orin.