Honda ECU USBMOD3 Dongle design
Click on the thumbnails to get a very high resolution picture. Sorry about the fuzzy closeups. I got a little too close for the macro lens.
I soldered a pin header into the CN2 holes on the ECU board. I drilled a hole for a 6 pin DIN female connector, and used spare shielded wire from a scrap wiring harness to connect the header connector to the DIN connector: (The blue wire is unused, unless you were to make an RS232 dongle.)
I should have used a smaller DIN connector. I drilled the DIN connector hole a little too close to the top of the ECU case as you can see from this picture. If you do this, you might want to shop for a smaller connector.
Here is the header connector on the pin header.
Here is the dongle I made with the USBMOD3
I used a bit of vector board and wire to make the needed USBMOD3 connections:
Hope this helps.