3.1 computer wiring diagram anyone?

[farmerz24]

hi im looking for a wiring diagram for the computer for a 90 or 91 w body 3.1. if anyone has one or any info on the pinouts please let me know asap

its the 227 or whatever computer which is compatable with the grand prix turbo, as im needing the pinouts on the comp

thanks guys

[Juglenaut]

sadly there is no spec sheets available for ECM's from GM down to the circuit schematic pathways or component level.

If their are any, it is from a persons personal research. Get a logic probe and/or a VOM to find out what pin goes to where.

Always check continuity when the computer is disconnected from the harness and the battery is disconnected.

[Juglenaut]

I do however have wiring diagrams of the system level on ECM upto 1997..

I can get a scan of them latter if you want.

[Mechanic]

You should be able to find the info you need in this post :

PCM Technology Post

The scans are not the best, but the Excel spreadsheet should clarify the 1227727 pinouts quite well.

[farmerz24]

thanks, that link was quite helpful.

[v6h.o.]

i have a 91 Wbody Service manual. can always photocopy it.

[farmerz24]

oh please send it this way dood