I have a 2005 XLE. In the last month, I have had three instances where it did something very strange: Driving along, once freeway doing 65, once city street doing about 35, and once on a freeway on ramp at about 25, the traction control kicked in, the van braked, and the traction control light on dashboard came on with a beeping sound. I understand how the traction control works, but each time it was dry, level pavement, no rain, no gravel, no conditions that would necessitate the traction control. The last time it happened, the traction control was off, as I was driving it to the dealer to have it looked at. Dealer had it for two days and says they can't find anything wrong with it. Anyone else have this happen before?
Traction control problem
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Was the beeping sound 5 beeps with about 1/2 second in between the beeps? This is what happens in our 2008 when the stability control activates. The traction control light on the dash lights up only when the traction control activates. If both the traction control and stability control are activating for no good reason, that sounds like a major problem.
A while back there was some info about faulty yaw sensors and them causing this. I don't know much more as mine doesn't have VSC or traction control. Seems to happen in Sequoia's as well:
http://www.automotivehelper.com/topic544406.htm
http://www.automotivehelper.com/topic544406.htm
Milhouse said:
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you beat me to it - back on the old board there were a couple of threads about this, particularly with the early models of the sienna.
long story short, for those affected the problem occurred intermittently, so it was initially hard to diagnose because the dealers couldn't recreate the problem on demand, but it was eventually traced back to a faulty yaw sensor.
i'm not sure if there was a TSB on it, though.
long story short, for those affected the problem occurred intermittently, so it was initially hard to diagnose because the dealers couldn't recreate the problem on demand, but it was eventually traced back to a faulty yaw sensor.
i'm not sure if there was a TSB on it, though.
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edit - this looks like there is a TSB on it, scroll down a bit through the list.
http://www.carcomplaints.com/Toyota/Sienna/2004/tsbs.shtml
http://www.carcomplaints.com/Toyota/Sienna/2004/tsbs.shtml
I assume that someone has performed the zero point calibration procedure on your van? Alternate version.
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I had this happen over the weekend. I brought it to a mom & Pop dealer where I bought the van. HERES HOW THEY FIXED IT
Symptoms: Driving when hits 35 mph, traction control alarm beeps and light flashes. Over 45 mph, vehicle begins braking. All symptoms stop when below 25 mph.
Action taken: Diagnostic for the ABS / trac control system. Read all codes and scope each sensor for faulty signal. Run system and confirm all modules and sensors are functioning. Test drive vehicle and confirm problem. RESET AND RECALIBRATE ECM AND BCM AND YAW RATE SENSORS.
they say this was all due to badly worn wheel bearings. I did not hear them, probably because I got used to the noise over time.
Symptoms: Driving when hits 35 mph, traction control alarm beeps and light flashes. Over 45 mph, vehicle begins braking. All symptoms stop when below 25 mph.
Action taken: Diagnostic for the ABS / trac control system. Read all codes and scope each sensor for faulty signal. Run system and confirm all modules and sensors are functioning. Test drive vehicle and confirm problem. RESET AND RECALIBRATE ECM AND BCM AND YAW RATE SENSORS.
they say this was all due to badly worn wheel bearings. I did not hear them, probably because I got used to the noise over time.
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Did your problem get resolved? If so, what was the fix? My sis is having the same problem and the dealer and a couple independent shops could not figure it out. Thanks.
Same problem here. Started a couple of weeks ago, it has happened a half-dozen or so times. Haven't been to the dealer yet. Nearly got rear-ended this morning. I was hoping to find a recall or service bulletin on this problem. Anyone else experiencing this?
We've been experiencing this for the last couple of weeks. Today was the first time it happened with Traction Control off. It usually begins on a curve, but continues up to a mile or two on straight freeway. This is on a 2006 Sienna LE. Is this a known problem with this vehicle? Are there any related recalls or service bulletins?
Thanks for your help.
I have experienced the same issue with 2004 Sienna XLE Limited with 100,500 miles. Traction Control kicks in at 60 miles per hour on straightaway, and brakes car and cuts power. Almost lost control of vehicle when it happened, steering into other lanes. Took it to dealer Wondries Toyota in Alhambra CA, twice but unable to duplicate. How do you get toyota corporate to look at it and how do you report it to NTSB?
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I have an 2006 sienna xle and have the same problem. Just started last month and scares the heck out of you when it happens. I have had the scanner put on the ecm and they say it holds no history. Happened again tonight after I took it last week and had the front end aligned to manufacturers specs. Not sure where to go next but sounds like a sensor. Other posts say a YAW sensor may be bad. I will have that checked next. That is if I don't wreck the car first.
Refer again to my post #8 above. Any time you have a change to the suspension calibrations, and this includes alignment, you must have the zero point calibration done to recenter the sensors. And as these vans age, worn struts, bushings and ball joints, even a change of tires can trigger it.
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Kinerets Post - I own a Toyota Sienna minivan and it is doing the same thing you captured in video. We have had the van in with Toyota for a total of $3000.00 worth of expenses. However, problem was not fixed. Were you ever able to identify the problem and fix the problem completely? Please post and update. The situation is frightening. My car has only 100,000 miles but I am afraid to drive. We did have zero point calibration done, steering wheel sensor replaced, sensors on wheels tested, as well as many of the other things referenced in post 8 completed. It also happens with TRAC Auto button off.
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I posted a few weeks back about the same issue with my Sienna. Were you able to get the issue with your van fixed?
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Just purchased 2006 XLE experienced the same issues others have described all in excellent driving conditions. This is a huge blow to Toyota in my mind. My loyalty level has diminished greatly. Not because there is a problem. Because they won't fix it. I've filed a complaint with the U.S. DOT National Highway Traffic Safety Administration. I would recommend all do the same!!!
http://www.safercar.gov/
http://www.safercar.gov/
We also have been experiencing this issue with our 2005 XLE Limited for the past few months. My wife is very worry about being rear-ended during one of these occurrences. Talked to the dealer briefly about a month ago - they said they have not heard of the issue. Taking the car back to them again with info I collected form this forum and others on the web. Also captured the occurrence on my phone to show to them.
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Add me to the list. Traction control kicked in doing 65 on a straight away. Clear sunny day. Scared the crap out of me. It happened again 2 days later while my husband was driving. This time it was raining, but not significantly out of the ordinary.
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