[tm1100s]

If you folks are fearful of 'fly-by-wire' control you may want to consider where the term originated and apply that to your next airline ticket reservation.

At a shop I worked many years back, the AAA gave us one of those Audi's with the suspected throttle control problem to play with for about a month. The owner claimed that the car just drove itself through his garage door, and of course, the AAA disputed this. We looked it over in detail along with some engineering types we had available to us. We didn't find anything. Eventually, they chalked it up to some kind of vacuum leak (not likely), and that was that.

Cageyar could be right about the mechanical aspect on the Toyotas, and I think this would be the easiest diagnosis and fix. On the other hand, some combination of inputs that introduce an intermittent glitch in the ECU hardware or programming might be impossible to diagnose, duplicate and correct.