Thread: Vehicular ECU Wiring Harness Pinouts

I know that there's something like this floating around somewhere, but I had a hell of a time trying to locate it. So... I created my own.

I've attached it here for all to share and share alike.

EDIT:

Added OBD2 diagram.

Nissan Specific harness connectors (pigtails) and replacement leads available via Nissan Techmate:

Nissan TechMate - Engine & Electrical - Electronic

Pin Tool Set:
http://tools.nissantechmate.com/Detail.aspx?id=590&cid=1

Updated PDF file. Tach signal color code said RPM and not the actual color code :o

Awesome! Good work, will come in handy Thanks

OBD1 wire colors might vary from plug to plug. OBD2 finally standardized wire colors for Nissan.

GA and SR harnesses are different of course. Every obd1 sr harness I've seen has been the same.

Since this is stickied, here is another pin out that will come in useful. I keep this one up to date:

OBD1, OBD2, and OBD2 32 Bit pinout



I've seen variations, especially with US vs JDM. Wirecolors are pointless for the most part anyway. Always verify with a DVM.

Good stuff. I'll have to print that off and see if I can verify it against my 93 G20 and see if its the same or not.

Thank you very much for this Diagram! Just fixed my CEL with this.

What CEL was that?