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2011 Toyota Sienna



  • wwestwwest Posts: 10,706
    You can generate as much brake fluid pressure as you like, as much as you can, but unless the Prius' skid control computer enables frictional braking by opening the manifold ports NONE of that pressure will reach the brake calipers. That's how the Prius manages the apportionment of the braking effort between frictional/hydraulic and regenerative braking. The skid control computer has individual LINEAR manifold brake pressure porting controls for each of the 4 wheels.
  • ateixeiraateixeira Posts: 72,587
    But some pressure did reach the brakes, note how much they wore down. The article in the WSJ said the wear was not consistent with strong braking, either, so he was feathering the brakes and accelerating.

    Sikes also said he was standing on the brakes but the CHP reported he saw the brake lights coming flashing.
  • wwestwwest Posts: 10,706
    The CHP officer has now submitted a more detailed written report in which he says he saw Sikes in a "posture" that indicated he was using all the strength he could muster on the brake pedal but as the officer observed even though they were travelling uphill the Prius was not slowing.

    It was only after Sikes applied the e-brake that the Prius began to slow down.

    All perfectly consistent with the skid control not allowing frictional braking or minimal frictional braking.

    20-30 minutes, 1200 to 1800 seconds and a total of 500 combined brake/gas pedal applications, one every 2-3 seconds, does that even sound humanly possible..or even reasonable?? And is there even time for the drive train to react with any reasonable level of drive torque between those 4-6 second brake pedal depressions..??

    Sounds more like the kind of thing that would result from a rather serious computer coding fault.
  • yatesjoyatesjo Posts: 186
    I don't have much knowledge of how hybrids work in this case (I didn't really like the Camry I had opportunity to drive) but every other vehicle I've operated, pushing hard enough on the brakes will induce mechanical braking even if the brake fluid is completely drained. This mechanical braking is a matter of safety in case of complete brake failure and I cannot imagine why Toyota engineers would inhibit it. Pulling the parking brake- commonly and incorrectly referred to as the emergency bake- is something that really is not advisable at speed unless you want to spin out (I've did it a number of times in my foolish youth as a fun way to make a FWD car do a quick 180).

    I had a Shi.. er Chevy once that developed a blockage in a front brake line that mildly applied the brake on one wheel. Unknowingly, I drove a couple miles like that only noticing a pull to that side, but when I got out I found the brake disk glowing red with heat. When cool, the disk was badly warped, the pad wear was visibly different and the entire caliper had to be rebuilt. The point is even moderate braking pressure over an extended period of driving even at normal speeds will cause a dramatic heat buildup in the brake, causing easily observed damage.

    Conclusion: The guy wasn't pushing the brakes as aggressively as he pretends.
  • "pushing hard enough on the brakes will induce mechanical braking even if the brake fluid is completely drained"
    You are kidding, right ???? Or maybe confused.
    All brake systems have 2 circuits split diagonal and a loss of fluid in ONE circuit will still leave braking available via the other circuit.
    The Sikes case is an interesting one, I am sure it would be more difficult to discredit the driver if they were say a good catholic nun !!!
    I think there is a computer problem that would be much easier to track down if Toyota were more honest with themselves. You have to remember, most driver "control" is just inputs to a complex computer and in this case the guy could well have been pressing hard on the pedal but the computer overriding him via brake or engine control error.
    As of right now, I will not be buying a Toyota or Honda van until the situations are completely understood, explained and FIXED.
  • wwestwwest Posts: 10,706
    edited March 2010
    "..overriding him via brake or AND engine control error..."

    In the Sikes case BOTH.

    The HSD system control computer was "stuck" in cruise control "set/accel" mode while the skid control computer would not allow hydraulic/frictional braking without "permission" from the HSD control computer.
  • buytbuyt Posts: 1
    Looking for base Sienna + mats + security. Nothing else.
  • ateixeiraateixeira Posts: 72,587
    Source? I haven't seen the latest.
  • mbengembenge Posts: 18
    These are just my thoughts. I don't know if anyone will care, but I thought I'd share. If you don't care stop reading now. After a couple of months of going back and forth we've ended up with a 2010 Odyssey. For us it came down to function and preference. We have owned 4 Toyotas, and wanted to remain loyal. However, in our book the old Odyssey out does the new Sienna in some significant ways. This is comparing a 2010 Honda EX-L to the 2011Sienna XLE. First, power passenger seat in front not on the Sienna. Second, no FWD 7 Passenger option in an XLE. Yes, you can remove the 8th seat but then your left with that silly cup holder thing on the floor that can't be moved. Yet they can make an AWD 7 passenger XLE? :confuse: Third, visibility is not good. For my wife the rear view mirror was almost useless. Finally, and this is preference, the Odyssey just handles better. The Sienna's steering feels very vague and loose (especially at lower speeds). The Sienna is sharp looking and the instruments are all very sleek and cool. I am disappointed :( it didn't appeal more from a functional stand point.
  • fly2livfly2liv Posts: 2
    Mbenge- I understand your thought process. I had a 2000 Odyssey that I was tired of and ready to move into something newer and more exciting. I had been anxiously waiting for the Sienna, however when I finally went down to the dealer to check it out there were small details that Toyota hadn't really though out well. When I hit my head while sitting in the 2nd row seats of the Sienna Limited (I'm only 6 feet tall) that was the end of the road. I could either wait patiently for the new Odyssey and hope that they didn't make similar mistakes, or I could go back and check out the 2010 Odyssey.

    After reading about the 2010 Odyssey and the below invoice pricing deals currently in play I jumped on a 2010 Odyssey with nav and rear seat entertainment. It has been ten years since I bought my first Odyssey with no leather and absolutely no options for ~$32,0000 because dealers were charging several thousand over MSRP. I bought a fully loaded 2010 Odyssey ten years later for almost exactly the same price! Amazing.

    I love the exterior looks of the Sienna and really wanted to have one to call my own, but alas it wasn't the right time.
  • xando05xando05 Posts: 36
    While waiting for my car in service at my local Toyota dealer, to waste time, I decided to take a quick seat in the 2011 Sienna. I was really excited to sit in the big comfy looking barcalounger type seats.

    I was really surprised to find out, upon sitting in the seat that my legs were too long for the extended footrest. I would have to flex my legs(I'm 5'11) for my feet to rest comfortably on the footrest. I tried making some minor adjustments to the seat position, but without any luck. I guess the seat is designed for passengers a lot shorter than myself.

    Any thoughts?
  • mbengembenge Posts: 18
    Thanks for the affirmation... We didn't get quite the deal I wanted on the Odyssey. The nashville market is holding strong, but we were well under invoce, and the dealership provides some services that only the luxury guys usually do.
    One other thing occured to me about the Sienna. The Antenna on the XLE and lower trims. What is up with that 1990's, Corolla-esq antenna. At least on the Corolla you could push it down. Another thing that is better on the Odyssey.
  • hokiehighhokiehigh Posts: 14
    I went to Toyota dealer yesterday to test drive the Sienna, the ride is not as soft as I thought. One question I forgot to ask the sales guy was if the windshield wiper de-icer is standard on XLE, I remember the previous model has that feature.
  • ateixeiraateixeira Posts: 72,587
    That just means the CHP believed him.

    I'm sure the CHP would have felt differently if he knew this guy ran a porn web site, was bankrupt, had conducted fraud in the past, and owed Toyota $19,000.
  • jabcjabc Posts: 20
    Test drove an XLE during a test drive event in LA downtown on last Sunday.
    Got some gifts, but the parking is $8.00.

    Comparing with my 2002 Odyssey :
    The handling appears to be at the similar level (can’t wait to test an SE).
    The cargo space appears to be bigger.
    The center base is acceptable to me. It looks like a booster seat with 2 cup holders on the floor.
    The acceleration is not very impressive.
    Short test drive, so that’s all I got to share.
  • mfletou1mfletou1 Posts: 508
    Finally drove a 2011 Sienna. I drove an LE 8 passenger. For background, I have an 07 Odyssey EX-L.

    -Interior Dash Layout--love the 3.5 inch display, great place for trip computer info.
    -Modern electronics--far better looking than the previous generation (which looked very dated and ugly)
    -I'm fine with the dash materials
    -Lots of room up front--felt very open and airy, even compared to the Odyssey
    -Once up to speed, very quiet--very little wind and road news
    -Suspenion dampened well--without feeling too soft
    -Nice little details, like lighted cupholders
    -Bluetooth even on LE

    -Little disappointed in the powertrain-I remember it really feeling faster than the Ody in the previous gen--not so much this time. It IS quicker, but it doesn't feel as effortless and frankly it is pretty noisy--noisier than the Ody at full throttle.

    -Steering. And ultimately, this is probably the deal breaker, at least for my wife. This thing has very, very loose steering at lower speeds. It just "feels" big--my wife remarked that it felt like she was driving a much larger vehicle and she didn't like it. The feelings were a bit artificial, with a lot of play. It took more concentration and effort to steer the car.
    -The way its packaged. I've ranted aobut this before--can't get a DVD without buying premium package in MidAtlantic
    -Fit and finish. In the car I drove, the cloth seat was misaligned with the base--so there was a big, ugly gap between the cloth and the hard plastic seat. Not good.
  • ateixeiraateixeira Posts: 72,587
    I wonder if the curb weight has gone up, to dull the acceleration?

    Steering on the SE is supposed to be better.
  • mfletou1mfletou1 Posts: 508
    I think that is probably exactly what it is--higher curb weight. I haven't checked but that is what is logical. I can't explain the engine noise though--certainly noiser than the previous generation.

    Unfortunately, the SE is only going to be available in that charcoal leatherette. We don't do dark interiors...beige or bust, baby! (Actually, grey is fine too unless it is really dark--the charcoal is really dark.)

    I was at the Toyota dealership today getting my TCH dealt with and I talked to a sales manager about packaging. He said they are not allowed to order a vehicle configured differently than Central Atlantic Toyota offers, and that they can't go a dealer trade because the values are never equal. The best they can do is for you to buy a vehicle out of region and have it shipped to the local dealer, which I wouldn't do.

    Sienna didn't see to be getting much traffic at either Toyota dealership I was at. One other person looking at it, but nothing compared to Prius/RAV4. Honda sold 12k Odys in Feb--up over '09--be interesting to see where Sienna comes in with a full first month. I've seen a fair number on the road, but then again I live in the minivan capital of the world.
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