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SUVs Toyota Highlander Toyota Highlander Maintenance and Repair
4694 messages, Last post on Dec 01, 2009 at 7:16 AM
You are in the Toyota Highlander Forum. Your Hosts are steve_ & tidester
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Does anyone know how to make the gauges in the dash area brighter when the lights are in auto mode? I've tried using the dimmer knob and it doesn't change anything. The only thing that works is to take the lights out of auto mode. I guess the auto sensor doesn't think it's dark enough during daytime to brighten the dash gauges. In Chicago, however, we have tons of gray days that require a little extra light. I've also noticed that even when I'm in a tunnel or other very dark area, it takes the sensor a while to adjust and brighten the gauges. I wish it was a bit quicker on the draw. A minor quibble though. Any advice will be appreciated. |
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Why do you think we must "prove" ourselves "right" or correct? When someone posts a problem or a question about a problem in their mind it is clearly A PROBLEM. Most of us here do not set out and ask that the poster "prove" that the problem actually exists. It's perfectly fine for you to be a "doubting thomas" but unless you have good reason, a reasonable foundation for positing that the "problem" doesn't exist, then why not just assume, for the moment, that it does exist and help all of us look for, propose, a solution. Or maybe even propose further test methods to confirm the claim. If, in the end, we find that we have been chasing "wild geese", then no harm done, and most of us here enjoyed the chase while it was "on". |
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| I own a 2003 V6 FWD Highlander with 24,000 miles. I have not experienced this problem. I have even attempted to initiate it as some on this board have done. I have also driven a 2004 V6 FWD Highlander and did not experienced this problem. I even attempted to induce it. The 2004 belongs to a friend of mine. | |
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"When someone posts a problem or a question about a problem in their mind it is clearly A PROBLEM". No doubt about the fact "it is seen as a problem" by he or she who posts it. I can't dispute that. I also agree that something--a hesitation--is known to exist for some, under a very narrow set of circumstances. But here's how I see the issue:.... Are there problems defining the problem here--Problem Solving 101--remember? I believe so. In this hesitation controversy there seems to be far more speculation than fact in identifying the nature, scope, and data relating to the issue. Strictly speaking, it is being editorialized to a much greater extent than analyzed. There seems to be much emphasis on finding solutions, yet there's no clear fundamental agreement on (a) What the nature and scope of the problem is; (b) Is it known to be a mechanical/electrical/electronic malfunction; (c) Is is known to be related to the way suspect vehicles are operated; (d) Is it known to be a fundamental design related issue; (e) Is it known to be a safety issue; (f)Is it known to be some other as yet undefined issue; and (g) what facts are known and available to support any of these possibilities. The answer to all these questions is a fairly clear "negative". At the moment it seems we are chasing "Wild Geese", and there are "reasonable foundations" for suggesting that. In my opinion it's far too premature (and perhaps even beyond the expertise and knowledge of anyone here) to even make assumptions--as you suggest, let alone propose solutions. I'm far more pragmatist than "Doubting Thomas", my friend Wwest. I don't believe in accusing Toyota (or anyone else) of misdeeds unless there's reasonable and probable grounds to do so. Insisting "This is seen as a problem by those who say they have it" isn't sufficient, reasonable, or probable in my opinion. Basically that's all I'm saying, yet it seems some interpret that as insulting, accusatory,uncooperative, disruptive, negative, acrimonious.......and a host of other uncomplimentary adjectives.
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...it seems that this is turning into a dead end merry-go-round. At this time or to my knowledge, there is no resolution concerning the hesitation issue and until Toyota and/or other manufacturers of make/models experiencing the same come to the table with an explanation (or fix), debating who is right or wrong is futile. So let's all step back, take a deep breath, and agree to disagree without letting emotion get the better of us.
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Been browsing the various forums on the Volvo XC90 and would you believe there are many posts about transmission hesitation, even some thoughts that it's worse if you move quickly from braking to gas. Volvo is also FWD......
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Replying to: KarenS (Jan 05, 2005 6:05 pm) I know everyone has been trying their best to contribute, but we end up with useless guessing and some rather wacky theories, which decreases the value of this board.
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KarenS: I apologize. i can't help myself... if it were me, and the symptoms were repeatible on my car, i guess i would try to characterise it a bit better... the following would be something i would try to determine if by chance, there was hesitation associated somehow with the device sensing gas pedal position: Experiment 1. put your emergency brake on, take the car out of Park and put it in Neutral. scenario a): depress the gas pedal a moderate amount and watch the RPMs climb, and then ease up on the gas pedal (but only slightly) and watch the RPMs fall, then apply more force and watch the RPMs climb again. repeat the cycle a few times. use both your eyes on the tach and your ears to assess engine response to pedal movement. scenario b): repeat experiment, but instead of easing up on the gas pedal, come all the way off the pedal, then with RPMs falling (but not all the way to idle), re-initiate contact with the pedal and apply force to increase RPMs. repeat the cycle a few times. questions: in scenario (a) is the response uniform and without discontinuity (ie RPMs rise and fall without abrupt change)? in scenario (b) is there a lag before RPMs increase upon application of force to the pedal? Experiment 2. find a good stretch of road without intersections and stops. choose an imaginary point in the distance where you'd take your foot off the gas to allowing the vehicle to cost down, perhaps prior to applying the brake, as if you were comming to a stop sign or light that was still red. scenario a). instead of letting off the gas completely, try reducing pedal as much as possible but keep your foot on the gas while RPMs are falling, then apply more pressure to bring RPMs up to simulate proceeding through a light that just turned green before you got to the intersection. Repeat the cycle a few times. Scenario B: perform the same experiment, but take your foot off the pedal completely and allow coast down, then get on the gas. But don't use the brake to slow the car. repeat a few times Scenario C: the same as B but use the Brake to slow the car quicker than in scenario B, before re-applying the gas. repeat a few times. Questions: was there hesitation sensed in scenario (a)? how about in (b)? how about in (c)? these systems are pretty complex, with the interaction of the engine, transmission, and control input device. what strikes me is that some people claim to have the problem, while others do not. one would think if it were strickly a software/programming problem, everyone would experience it, but perhaps to more or a less degree depending on driving habit. on the other hand, if it's hardware related, maybe it exists to a more or less degree on some cars, and not at all on others. what if there were some hysteresis or other non-linearity in the position sensing of the pedal near zero, which when you are at low speed, might be much more noticeable then when you are at high speed and take your foot off the pedal, then re-apply the gas. perhaps at high speed there is the forward momentum of the vehicle and the gearing to dampen the transient. also check out messages 2799 and 2809 in Toyota Camry Problems and Solutions i'll go away now. |
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is this similar to the hesitation being reported in the Toyota Sienna Problems and Solution (2004)+ ? why would people try to discount the observations of the people experiencing the issue? |
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"Consumers don't always do (what's) best with the throttle..." With e-throttle "we gain better overall control..." "It also simplies "shift-shock" control by letting the computer ease off the throttle for smooth automatic upshifts" Words of Paul Williamsen, cirriculum developement manager of Toyota Motor Sales USA. http://www.sae.org/automag/techbriefs/02-2002/index.htm
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