Wiring schematic needed for 95 Jimmy W series MAP ground at ECU

Do any of you have a confirmed connector location at the ECU/VCM for the MAP
sensor ground? According to my trusty Chilton¹s which lists 94-99s (and
excluded 95 schematics), it says ŒG19¹ which I can only assume is a typo as
the location on the VCM is C19 I think. Rather than using the wrong
schematics and trying to correct typographic errors, can anyone confirm
exactly which pin on the computer grounds the MAP? I know I could reground
it elsewhere but I want it fixed properly (this may cause drops on other
circuits sharing the same ground such as the fuel pressure sensor and IAC
according to the Œ96 schematic I have).

I am 99.998% sure I finally fixed my problem. There¹s a voltage drop of
nearly .5V at the MAP ground! When I tested ref voltage using the sensor¹s
ground, I got 4.7VDC and when using the alt case or battery I got 5.2VDC!
Respectively- when I metered the output voltage, it was also skewed by the
same drop value. I¹m assuming that this will cause the computer to adjust
fuel trim based on an altitude somewhere on top of a ice-covered mountian...
I think if I fix the ground, my cyl 1 misfire should disappear. Back to
that nastly connector... anyone??

Thanks!
Andrew.

Wiring schematic needed for 95 Jimmy W series MAP ground at ECUTry autozone.com/repairinfo for a basic wiring diagram
"AWN" <anixon1 (AT) cogeco (DOT) ca> wrote

Do any of you have a confirmed connector location at the ECU/VCM for the MAP sensor ground? According to my trusty Chilton's which lists 94-99s (and excluded 95 schematics), it says 'G19' which I can only assume is a typo as the location on the VCM is C19 I think. Rather than using the wrong schematics and trying to correct typographic errors, can anyone confirm exactly which pin on the computer grounds the MAP? I know I could reground it elsewhere but I want it fixed properly (this may cause drops on other circuits sharing the same ground such as the fuel pressure sensor and IAC according to the '96 schematic I have).

I am 99.998% sure I finally fixed my problem. There's a voltage drop of nearly .5V at the MAP ground! When I tested ref voltage using the sensor's ground, I got 4.7VDC and when using the alt case or battery I got 5.2VDC! Respectively- when I metered the output voltage, it was also skewed by the same drop value. I'm assuming that this will cause the computer to adjust fuel trim based on an altitude somewhere on top of a ice-covered mountian... I think if I fix the ground, my cyl 1 misfire should disappear. Back to that nastly connector... anyone??

Thanks!
Andrew.