do all the pr4 ecu's have a 16 pin connector?
The one in my car does but the one in the manual I have has a 22 pin connector and its named 'D'

 

not sure of the pin count......
but I do know that there are two pr4 ecus; one was for the 90-91 integra and the other for the 92-93 integra. The connectors are different between the two.
I found this out when I picked up a pr4 ecu to run on a 90 crx that I had with a b18a swap (it was running on a pm6 ecu )
anyway, when I try to plug the ecu in, it doesn't fit..........found out it was because it was for an obdI 92-93 integra.
got a hold of a obo0 pr4 ecu (90-91 integra) and it pluged right in.

 

I think the manual I have only shows the pin out for the 92-93, and that's why the colors don't match up.

anyone have any pin assignments for the 90-91 pr4 ecu?

 

anyone have any info on the plugs?

 

does anyone know the color codes for the c connector on the pr4?

 

be prepared to be hooked up.










hopefully you know how to read some simple wiring diagrams

 

now that is a beautiful thing.

Thankx dude