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Toyota Highlander Maintenance and Repair

4686 messages,  Last post on Nov 08, 2009 at 8:23 PM

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#1446 of 4686 Bikeman3 by cmuniz Jul 03, 2004 (3:39 am)
It could be the ABS system - that would explain why it doesn't happen regularly. However, it was more a steering wheel vibration than other ABS vibrations that I have experienced. In other cars I've had with ABS you could feel the vibration coming from the brake pedal, not the steering wheel. Maybe the Highlander is different. Since I can't duplicate it I haven't taken it to the dealer, but I am on the lookout for it to happen again so I can get a better handle on what is causing it. It didn't seem to affect the braking performance but it gets your attention, which is consistent with what happens when ABS engages.
#1447 of 4686 STEERING VIBRATION while braking at 70 mph by dmoyer Jul 03, 2004 (10:00 am)
Ref msgs # 584,1440,1442,& 1446. STEERING VIBRATION while braking at 70 mph by dmoyer, msg 1439   My only experience was on a hot day, long time running at +70 mph and then had a sudden but not panic breaking sequence. At first the steering wheel vibrated back and forth what felt like the front end out of alignment, lasted just several seconds, released the brake, braked again, less noticeable and then shortly afterwards felt no vibration after the third time. Continued to drive for several hours and no problems. It was scary at 70 the first time. Felt nothing from the brake pedal. The question is how do you pose the issue to Toyota if you can't demonstrate it!
#1448 of 4686 Braking... by wwest Jul 03, 2004 (3:21 pm)
Haven't I seen something recently that says that Toyota and Lexus both have some sort of automatic brake pressure regulation?   In my 01 AWD RX300 I often notice a distinct "throbbing" when on wet pavement and slightly downhill. I have always assumed that it was due to this pressure regulating system trying to achieve equal braking on all wheels simultaneously.   No slippage between tire and pavement but one or two wheels tending to slow faster than others and the system slightly releasing pressure on those to equalize all around braking.
#1449 of 4686 Vibration as noted with a single hi-speed by sdanders Jul 03, 2004 (7:21 pm)
stop can be resinous and metallic deposition from pads and other build up that gets on the rotors during normal driving...the extreme heat of the hi-speed stop burns it off and then the brakes work fine. The rotors and pads get real smooth again..Warped or out of parallel rotors would continue to give a shaking feeling. Have had this happen on my Acura as well...I am a real moderate driver and brakes last me for 50K or more...Periodically, just perform a controlled burn off and then you won't be surprised at the wrong time. My HL has 48K on it now and the pads are like new
#1450 of 4686 dmoyer by cmuniz Jul 04, 2004 (3:13 am)
You described my experience exactly. I did the same thing you did and all was ok after that. Explanation in post 1449 makes sense, but there is no way to duplicate on call for the dealer and not sure how they would fix it. It is scary, but apparently not dangerous if you don't panic.
#1451 of 4686 by wain Jul 04, 2004 (3:52 am)
you would think the dealer could see this stuff on the discs? If its gone and the problem is gone then don't go to the dealer?
#1452 of 4686 STEERING VIBRATION while braking at 70 mph by dmoyer Jul 04, 2004 (6:49 am)
Ref: msg 149 Vibration as noted with a single hi-speed by sdanders.   Thanks for your insight. Makes sense under the conditions that I experienced. I'll remember your "Periodically, just perform a controlled burn off" next time.
#1453 of 4686 Coolant Fluid by thoon Jul 04, 2004 (10:23 am)
Is it normal to have tiny white particles floating around in the coolant fluid? Can it be replaced under warranty? My car only has 25,000 on it. Replies to this message: rugby65 (Jul 04, 2004 12:23 pm)
#1454 of 4686 Re: Coolant Fluid [thoon #1453] by rugby65 Jul 04, 2004 (12:23 pm)
Replying to: thoon (Jul 04, 2004 10:23 am) Have you added any anti freeze since you bought it? If so you may added a brand that's not compatible with whats in it.
#1455 of 4686 by thoon Jul 04, 2004 (1:29 pm)
I didn't add anything. I got an Express Lube Plus at my local dealer last month and they over filled the tank, so when I opened the reservoir to remove some of the fluid, I saw a bunch of small particles in the tank and lots of dried crusty fluid on the tank and on the cap.

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