747 meet 730, 730 meet 165

[Mike Jones]

Some models of industrial pressure/vacuum transmitters use a variable capacitor as the sensor.  Is that perhaps how a typical MAP works?

Mike J.

 
> I think  the sensors that get gnd and +5v such as the map and tps (not
> the [heated] O2) can be shared.  I don't think they rely on a resistor
> divider arrangement like the coolant temp sensor.  The map on my '92 GM
> truck even appears to have an internal amplifier/buffer (can't measure
> resistance, but give it gnd and +5v and a voltage that changes with
> vacuum comes out [no pullup needed]).