[Bohdan.L.Bodnar at att.com]

GM and Chrysler MAP sensors have an output which is roughly between 0.1 and
4.9 volts.  At atmospheric pressure, a GM or Chrysler MAP sensor designed for
a self aspirated engine will output around 4.9 volts whereas a sensor designed
for a supercharged engine will output around 2.5 volts.  Ford's MAP sensors
(and BMAP sensors) output a variable frequency.  At atmospheric pressure, the
frequency will be between 155 and 159 Hz.

Please keep in mind that the voltage/frequency reading will be dependent on
altitude, weather conditions, etc.

Typical connections to the sensor:  black (signal ground, NOT power ground),
red (5.0 volts reference), green (output signal, sometimes called "signal
return").

About a year ago I posted a table which gave output frequency vs. pressure for
a Ford MAP sensor.  Now, does anyone have one for Chrysler stuff?  If so,
would you kindly mail it to me?

Thanks,

Bohdan Bodnar
bohdan.l.bodnar at att.com