I am copying my subject line from a thread by b11101100 who's ideas I based my project on. I added my project details to his thread as this is really a continuation of what he started. In short, I built a microcontroller based navi speed bypass that installs on a Prius v and uses just the connections on the L38 plug to the head unit. It is activated/deactivated via a long press of the "On Hook" steering wheel button. To see the details have a look here and scroll down to Post 27: Speed sensor defeat - a modified approach | Page 2 | PriusChat .
