Edmunds.com | Inside Line | Auto Observer Your Account | Help | Directory
You are here:
![[F]](http://a332.g.akamai.net/f/332/936/12h/www.edmunds.com/media/townhall/webxicons/site.gif){kind=small}
Forums
SUVs Toyota RAV4 Toyota RAV4 Cruise Control Problems
285 messages, Last post on Jun 14, 2009 at 8:14 AM
You are in the Toyota RAV4 Forum. Your Hosts are steve_ & tidester
|
Replying to: ces1938 (Nov 18, 2007 6:41 pm) "Well guys, I got my problem FIXED, not from Toyota tho, I have an old friend that is quite the car expert, I told him of my problem and he said "no problem" , he checked out my cruse and had a real ha,ha. with that he said he could not believe how much Toyota has come down hill with their quality control problems but looks like they have got to being bigshots and no longer care about their customers, they just want to sell more cars than GM.... but anyway, he went down to a local auto parts store and paid $140.00 for a cruse control that would fit a 1996 Camry 4 cyl. 4 speed, he pulled the computer module out of my Rav's computer and just disconnected the darn thing... he installed the 1996 cruse control, than we took her out for a spin.....FOLKS IT WORKED PERFECTLY." This is an importent post. It shows that Toyota can fix this warranty issue today. They just have to do it. Bill |
|
|
First, no car manufacturer can readily, easily, modify/retrofit any vehicle that has already passed the EPA, CARB, testing/qualification procedures in any way that might affect fuel emissions, adversely or otherwise. For me, I'm quite satisfied that all this "shiftiness" going on with the '07 and later models are directly related to industry efforts to improve FE, even in rather small increments. The basic idea is to keep the engine operating at the LOWEST possible RPM, LOWEST frictional losses, at which the engine can JUST BARELY maintain your desired speed. "Set" speed in the case of CC. On vacation this past February I drove a new Mazda Minivan the first week and a new Chrysler Sebring the second week, both with V6 engines. I was astounded, literally, at the number of shifts these vehicles would go through, especially in CC, traveling over only slightly rolling terrain. At first I thought that I could do better not using CC, but that proved to not be the case. What was happening was the fact the the transaxle was doing more shifts than a expected, a lot more shifts, made the CC shifts more noteable. " It would not even drop out of overdrive when going up an incline without pushing the pedal farther..." Yes, exactly, you SEE the upcoming incline and add a bit more gas to hold your desired speed even with the harder climb...The CC, being totally BLIND, must want for the speed to fall off and then command the downshift. In order to reduce the number of those downshifts it might delay to be certain the "event" is sustained. Then the downshift might become HARSHER, double gear "grab", if the incline increases before the decision to downshift is made. The thing to remember, keep in mind, is that you have forward vision of the upcoming roadbed while the CC does not. So the CC system must wait until the speed falls off before realizing that the going has gotten harder. That often results in a much harsher downshift than if you were driving, and automatically, UNCONSCIOUSLY, depressed the gas slightly as you reached the inclined section of the roadbed. And obviously a 4 cylinder, lower HP, engine, typically also with fewer gear ratios, 4 speed (WHY??), would be more prone to shifting, HARSHER shifting than the V6 6 speed transaxle counterpart. This is a horrible thing for me to suggest, but try a full tank of premium fuel and see if the "shiftiness" doesn't lessen.
|
|
|
Replying to: ces1938 (Nov 19, 2007 12:42 pm) (ww1940) |
|
|
Replying to: wwest (Nov 19, 2007 4:12 pm)
|
|
|
Replying to: ces1938 (Nov 19, 2007 4:48 pm) |
|
|
Replying to: ces1938 (Nov 19, 2007 4:48 pm) This is 2007 and gasoline is now above $3.00/gallon besides which general wisdom aside, programmer do learn. Yes, it takes more time than for most of us.... My 2001 911/996 C4 has DBW and I have absolutely no complaints. |
|
|
Replying to: ces1938 (Nov 19, 2007 4:48 pm)  http://www.nissanusa.com/rogue http://townhall-talk.edmunds.com/WebX/.f151681/ Mike |
|
I found this just in time for my arbitration hearing. Using ideas from this forum,I dashed around and got everything I needed to present my case on Nov. 15. I had my repair invoices from 2 different Toyota dealers, 2 trade offers, (one from Toyota, and one from a GM dealer), and a list of case numbers from this forum that Toyota was repurchasing. Had my hearing, and Toyta rep. stated that Toyota would have a TSB for the cruise during the first quarter of 2008. Went for a drive, and the dumb thing worked perfect, NO gear hunting! Went around and over the same road again, and only did it 2 times. Usually in this spot it will gear hunt 4 or 5 times!!! Thought that would do me in, but not so! Just got my mail and Toyota has to repurchase my Rav 4. So, thanks to all of you and all of your good ideas. My case number is 2107156. JMWP
|
|
|
Replying to: wwest (Nov 19, 2007 3:49 pm) "First, no car manufacturer can readily, easily, modify/retrofit any vehicle that has already passed the EPA, CARB, testing/qualification procedures in any way that might affect fuel emissions, adversely or otherwise. " Response: I am not buying it. Part is broken. They can fix it. I am not so sure you couldn't take it off completely if you want to do so. Not all cars have cruise control. wwest said: "The basic idea is to keep the engine operating at the LOWEST possible RPM, LOWEST frictional losses, at which the engine can JUST BARELY maintain your desired speed. "Set" speed in the case of CC. On vacation this past February I drove a new Mazda Minivan the first week and a new Chrysler Sebring the second week, both with V6 engines. I was astounded, literally, at the number of shifts these vehicles would go through, especially in CC, traveling over only slightly rolling terrain. " Response: I drove the Sebring and that isn't this. This thing is bucking like a bronco and jumping upwards to 5K RPMs and then back to 2K up to 3K. It's broken. wwest said: "The thing to remember, keep in mind, is that you have forward vision of the upcoming roadbed while the CC does not. So the CC system must wait until the speed falls off before realizing that the going has gotten harder. That often results in a much harsher downshift than if you were driving, and automatically, UNCONSCIOUSLY, depressed the gas slightly as you reached the inclined section of the roadbed." Response: If that theory were true it would be consistent both within one particular vehicle and then across the product line. That is, all the RAV4, 4 cylanders would react the same on the same road. They don't. And mine used to buck and then stopped. This gear hunting isn't engineering. It's broken. And that's why the trade in value has dropped on this particular model. wdpcpa
|
|
|
Replying to: jmwp (Nov 26, 2007 3:11 pm) Congrats on winning your case. I think that is good news for all of us. I am going to alert my dealer, just so he knows. Also, thanks for the information on the TSB. wdpcpa |
|
You are here:
Forums
SUVs Toyota RAV4 Toyota RAV4 Cruise Control Problems
New? Join Now!
Forum Tools
Search Forums
Browse by Vehicle
2011 Toyota RAV4
Browse by Board
Browse by Topic
