2010 brake failure - unintended acceleration

[SailDesign]

Wearing wide boots/shoes?
Are you SURE you didn't have part of your foot on the gas pedal, and the ABS was also kicked in? I'm not saying I doubt, but there are a lot of things that would give you that feeling. The ABS feels like someone is sand-papering your foot, and the lack of immediate braking can feel like acceleration (since you are expecting to slow down...)
Let us know of any further progress, would you? I've driven my '09 in single-digit temps with no problems.

[Steveh27]

My shoes were not the problem. I did just call the dealer & he thought it was the ABS. I hope so, but that would be very scary as it didn't stop me & the grinding noise was unexpected. It was the first time I drove this on snow/ice. I'm 60 and have a lot of experience driving vans & suvs in the winter. This was different then anything experienced before.

[Flipper_1938]

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[Yaristeve]

Originally Posted by SailDesign

.... and the ABS was also kicked in?... ...The ABS feels like someone is sand-papering your foot, and the lack of immediate braking can feel like acceleration (since you are expecting to slow down...)

I have a 2004 IS300 and this is the exact sensation I get when the ABS (prematurely, in my opinion) kicks in. When I am braking hard at the threshold (or beyond threshold according to my car's ABS sensors), the brake pedal gives a buzzing/grinding sensation and the front end picks up and the car feels like it is accelerating because, as SailDesign says, you're expecting to be slowing down. If I were OP, I would test the ABS in an empty parking lot and see if you can intentionally re-create the condition.

Frankly, I think Toyota's ABS programming is overly conservative (i.e., kicks in too early)...

[SailDesign]

Originally Posted by Yaristeve

<snip>
Frankly, I think Toyota's ABS programming is overly conservative (i.e., kicks in too early)...

Exactly - much too early. I'll be curious to see how it behaves with snow tires.

[why?]

Originally Posted by Steveh27

Not sure how to list this problem. I hadn't driven my car in 1 1/2 days & we've got bitter cold temps, 9 last night 16 today. Leaving to run some errands I went 100' and came to my first stop sign going only 15 mph. The front brakes started grinding and the car continued accelerating & didn't want to stop! Uh oh. Thinking about the headlines for the other Toyota models. I went to the next stop & the same thing happened. Then it didn't happen again until 3 miles later when it happened twice more. Hasn't happened since. I'm thinking it was due to the frigid cold. My car has only 7200 miles on it.

Going to drive on the freeway in 2 hours for the first time since this happened. If it happens again I'll call a dealer 8 miles away.

What they've said above. I'm betting you aren't that familiar with what abs feels like. it is a really weird feeling, but the car is slowing down.

Originally Posted by Flipper_1938

That is exactly how my 2010 sedan acted in the snow a couple of days ago. I am liking my Yaris less and less. Toyota has gone to hell in a handbasket in my opinion. My 2001 Echo was a great car, much better than this POS.

you're just clueless. Thinking a 10 year old car could possible be better than a brand new one is pretty much the most clueless thing a person can possibly believe. Learn how abs works, use your brain a little, and realize how things work.

[Flipper_1938]

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