Last post on Dec 06, 2013 at 7:35 PM
You are in the Toyota Highlander Hybrid
What is this discussion about?
Toyota Highlander Hybrid, Brakes, SUV
#123 of 139 Re: My 2007 Highlander Hybrid's Brakes Failed Resulting in 50mph Collision [kirstie_h]
Jun 04, 2010 (4:35 pm)
Actually, what I think saved me was that I have competed in Olympic Weightlifting for many years. I honestly think most people including my family would not have survived that impact or at the very least wouldn't have walked away from it. My body was pushed to the very limit and it is used to absorbing impacts, I hesitate to think of what might have happened if my wife or 7 year old son had been in the Highlander with me. I do give the Toyota structural engineers props though, the cabin bore more of the forces of the crash then I think most designers would even consider and it held up well ( 1 to 2 inches of compression)
#124 of 139 Re: ABS [mikeg333]
Aug 18, 2010 (9:39 pm)
I have the same problem with my Highlander Hybrid '06. It gets worst during cold months. I first noticed it during winter months when I was still in Pennsylvania and then when I moved to California it became less. I complained this issue many times to the dealership services but they only told me that its the regeneration of the brake system with hybrid system. They said I will get use to it. I dont know what they really meant about, what does a woman knows about stuff like that. But it was pretty much of a big deal to me because its a safety issue, plus I always have kids riding with me. When i read your post and others it became clear to me i am not crazy. I will surely file a complaint about this. Thanks for the link.
#125 of 139 Re: Hi Hy Brake issues [cdptrap]
Aug 18, 2010 (9:51 pm)
I have the same brake problem with my '06 Highlander hybrid. It slip very often particularly during cold season. The dealership just ignore me and said I will just get use to it. Many times I have avoided accident related to the brake problems, i would say i am proud to be a very defensive driver but the question is how long i can avoid it. By the way, the inverter broke down while I was travelling with kids on a busy freeway after 56k miles and just had the major service done prior to incident. The engine suddenly shut down while driving 70mph on a freeway, it wont turn on again. The inverter cost $8200 to replace it. It may happen to you too if you still own the Hi hybrid. I filed complaint to NHTSA, Toyota really need to address the problem. Its a safety issue.
#126 of 139 Re: Hi Hy Brake issues [app2]
Nov 19, 2010 (8:15 pm)
Hi i have had the same problem with my 2006 toyota hh,what have you done about the nverta,did the dealer take care of the repairs,please respond,there are a lot of us out there who have had the same problems,we need to get together
#127 of 139 Re: Hi Hy Brake issues [myraf]
Nov 20, 2010 (2:56 pm)
I've simply informed Toyota (twice) and told the dealer about the issue. Toyota doesn't acknowledge that a problem exists. The dealer mechanics have acknowledged it in asking them about it - but offer no fix. I believe it is simply seen by dealers as an "eccentricity" of the regen braking and not a safety hazard. And Toyota would rather it disappear until a major problem is discovered. I no of nothing to do other than re-think my braking closure rate to allow for the "slip."
#128 of 139 Re: Hi Hy Brake issues [paracletos]
Nov 20, 2010 (3:31 pm)
I recommend filing a complaint online with the National Highway and Transportation (NHTSA). It takes 2 minutes, and that is the way that we can all band together to show that there is a problem, regardless of what Toyota says!
#129 of 139 Re: Hi Hy Brake issues [cdptrap]
Nov 21, 2010 (10:53 am)
"..everything "heats" up.."
Yes, including the tire treads.....
Keep in mind that you are driving a FWD vehicle that is potentially a very DANGEROUS vehicle to be driving on a wintertime adverse condition, slippery, roadbed. Add to that the fact that your hybrid "wants to" make use of regen braking, FRONT WHEEL BRAKING ONLY, as a priority, a HIGH priority, and you have a somewhat (potentially) deadly mix of technologies.
Loss if traction, even momentarily so, on the driven, FRONT, wheels of your vehicle is a matter that requires INSTANT and URGENT attention. On a standard FWD with TC even the slightest level of wheelspin/slip arising from too much engine torque being used for conditions will result in INSTANT TC activation, engine dethrottling and braking of the engine driven wheels.
ABS is simply the "inverse" of TC, prevention of wheel lockup or skidding MUST be attended to INSTANTLY otherwise loss of directional control leading to an accident it far too likely.
So, with even the detection of the slightest level of impending (IMPENDING) front wheel lockup or skidding due to regen braking the braking mode MUST be switched. Regen braking, FRONT ONLY BRAKING, must be quickly disabled in favor of frictional braking ONLY, front and REAR frictional braking.
So, now, how should that transition be handled...?
The initial application of frictional braking in this instance MUST be, by default, calculated at the factory to be LOWER than the previous regen level. Otherwise we would soon find ourselves in the very same "boat"....impending wheel lockup/skidding and continuing ABS intervention.
So yes, in these instances, transitions from regen braking ONLY to frictional braking as a result of impending wheel lockup detection there MUST BE a transitional period of "lighter" braking. I don't see that the design engineers had much of a choice in this matter.
#130 of 139 Regen braking vs OAT.
Nov 21, 2010 (10:58 am)
On the hybrid Escape series Ford uses a regen braking control technique wherein the level of regen braking allowed before transitioning to combined regen and frictional is modified as a function of OAT. The colder it gets the less regen braking will be allowed before frictional braking is included.
Your HH might well have the same feature. And/Or more likely the "gain" used to detect impending lockup is increased as the OAT declines below, say, 35F.
#131 of 139 Upcoming Technology, Curve Control.
Nov 21, 2010 (11:02 am)
The new FWD or F/awd Ford Explorer has a new technology they refer to as Curve Control. It seems to operate by dethrottling the engine and the use of braking if the system decides that you're driving to fast for the road curvature.
It'l be interesting to know how well that works in real life conditions....
#132 of 139 Re: Hi Hy Brake issues [mimers]
Nov 21, 2010 (11:02 am)
Forgot to mention that I did post the incident on NHTSA months ago.