GM MAP Sensors

[Joe Boucher]

> From: Jesse R. Ortiz <jr at ij.net>
> To: DIY_EFI <diy_efi at efi332.eng.ohio-state.edu>
> Date: Tuesday, January 13, 1998 7:59 PM
> Subject: GM MAP Sensors
> 
> >Does anyone here know which wires do what on the GM Map sensors? I'm also
> >wondering what the signal range is on the two, and three bar map sensors.
> Is
> >it just a voltage range, like 0-5v?
> >
> >Thanks...
> >
> >Jesse.
> >
> >

You're in luck.  I'm messing with a map sensor at home, leading up to an
op amp circuit to modify the sensor signal to the ECU.  I found a power
supply from an ancient external modem that had a 1 amp, 5 volt output to
power my test setup.

The wires are: A) ground; B) signal back to the ECU; C) 5 volt signal to
the sensor.  Do you have the connector?  The wire identification is on
the plug.  If I remember right, if you hold the sensor with the
connector pointing up and the plug side of the sensor turned toward you,
then the wires are A, B, C from left to right.

You;ll have to wait till I get home to confirm.

Joe Boucher
'70 RS/SS Camaro  '81 TBI Suburban