So recently built a MS3X following westfields guide, and everything went smoothly until it came time to load the firmware. I literally spent days trying to figure out what I did wrong, and was began to think that maybe I somehow screwed up this simplistic assembly. Every time I couldn't detect a ECU on the Comm. I tried everything from reinstalling drivers, checking all the voltages across the board, switching cables, etc. and was just about to give up and buy a straight thru serial cable and use an old desktop PC until I got the bright idea to try an older release of the firmware. Sure enough it worked flawlessly the first time. So to anyone who can't detect the ECU when using the firmware loader, be sure to try the previous version!

Oh and if you need Westfields guide, the website is cached, just search website cache on google and put in this address.
http://westfieldmx5.devocht.com/mega...ms3/90-97-ms3/
(If it doesn't work PM me cause i screenshot the whole thing just in case I ever needed it again)

 

Can you show how you installed your Tyco connector?