One of the Taxi owners at my company has purchased a 2010 Prius for his fleet. The mechanics are trying to wire the car up for the GPS dispatch system we use. Not sure if that is why they need to know where the speed sensor is but they asked me if I could post the question here and find out. The mechanic at Toyota didn't seem to know himself. Heading out for a few hours and will check to see if anyone knows when I get back Thanks
I'm guessing that it is the violet/purple wire in pin 7 of connector L27 attached to the combination meter assembly (see picture).
Thanks for the reply Hawk. I will pass this on to the mechanic to see if it helps or gets them started figuring it out.