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1Gen-TundraGeneral discussion forum for the 2000 to 2006 Toyota Tundra.
This is a discussion thread titled "Cruise Control Adjustment...", within the 1Gen-Tundra forum, part of the Truck Forums category.
I just got back from our first trip in our brand new 2006 Tundra DC 4x4. I'm concerned about the cruise control working like any other cruise control I've ever operated. I work for Enterprise, so I've driven just about every make and model vehicle made, and I've never experienced a cruise control like our Tundra's. It's the most annoying cruise control I've ever operated. At the slightest uphill or gust of wind it downshifts immediately instead of just giving it a little more gas and maintaining the same gear. Also, let's say you hit the brakes and it comes out of cruise control. Then imagine dropping 5-10 mph, then hitting the cruise's resume button. All of a sudden it will downshift 2 gears and redline it to get it back up to speed rather than gradually increase speed like 99.9% of other vehicles do.
What the heck is up with this? It's the worst design I've eve seen, and very different than my 1997 4runner and 1993 Lexus SC400.
Is this something that can be adjusted or fixed? Has anyone noticed these problems? Is it all electronic or is it cable actuated? Thanks for the help on this.
mine dose the same thing - it just wants to get to the pre-set speed faster than any other car so it'll down shift if your way below the pre-set speed you were going at before - totally normal. I just speed up with my foot then hit the resume button.
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I think it's mainly because the engine is way underpowered, but it seems the point at which is downshifts could be adjusted. But, I'm not sure if it's a cable or electronic.
If I resume cruise and the truck is 5-7 mph below the set cruise level it will kick into gear and move.
my previous vehicle 1988 Ford econoline club wagon would do this as well, so it's completely normal for me on a regular basis, but I have driven other smaller cars that do slowly increase speed.
I think a lot of it has to do with the weight, size, and the fact its a truck. I mean think about it, if you were hauling 6500 lbs and you resumed cruise and the truck "slowly" accelerated, it would take forever.
I think a lot of it has to do with the weight, size, and the fact its a truck. I mean think about it, if you were hauling 6500 lbs and you resumed cruise and the truck "slowly" accelerated, it would take forever.
Unless it had enough power to pull the overdrive gear like it should, quite frankly. It's too bad they're so poorly underpowered. It's such a nice truck otherwise.
Chris
P.S. I'm seriously considering either a S/C or turbo to get rid of this problem. Or, if I could just figure out how to adjust it that would be helpful too.
I loved my 6-speed Taco for the same reason, and espeically my 6-speed Accord...cuising in top gear was awesome through rolling hills...never a hiccup, smooth like glass...
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Shopping for: Taco or older 4bang, 4x4
2008 Civic Coupe EX 5spd Manual
2007 Tundra Single Cab SR5 / 4.7L / 4x4 Red
2006 Tundra DC Limited TRD Black
2005 Tacoma Access Cab TRD Black
2005 4Runner SR5 Sport Blue
2004 Tundra DC SR5 TRD Silver
2004 Tacoma DC TRD Maroon
1993 Toy 4x4 single cab, 5spd, 4cly, black
1992 Toy 2x4 single cab, auto, white
1990 Landcruiser Grey
1988 Landcruiser Brown
1988 Landcruiser Blue
1987 4runner, 4x4, 2dr, 5sp silver
1985 4runner, 4x4, 2dr, 5sp red
1981 Toy 3x4 single cab, SFA, blue
To answer one question, it's all electronic, since this is a drive-by-wire throttle control system. The cruise switch is just an input to the engine control module.
All Toyotas with cruise controls that I've ever driven have this problem.
There is no cure, but I've found a partial treatment. The problem occurs on hills. If it's a slight hill, just put your foot on the gas and give it a little as you start up the hill. You can often keep it from downshifting by doing so. If the hill is steep, just disengage the cruise control until you get up the hill.
Stupid? Yup. But, you can't change it, and griping about it has no effect.
To answer one question, it's all electronic, since this is a drive-by-wire throttle control system. The cruise switch is just an input to the engine control module.
Why do they call it drive-by-wire if it's all electronic? Just curious, because it seems they wouldn't call it that if it was all electronic.
Why do they call it drive-by-wire if it's all electronic? Just curious, because it seems they wouldn't call it that if it was all electronic.
Chris
Because the info is transmitted via wire instead of mechanically through cables or hydraulic lines.
I have the same downshifting issue with mine, but it doesn't usually happen unless the hill I'm going up is real steep. I've found this cruise control seems to hold speed better on inclines than others I've used. The one is crysler's vans is horrible, it can vary by as much as 5 mph on slopes. One thing that might keep it from downshifting so much is turning off overdrive on hills... that way it only shifts down once.
Mine does the same thing. If I'm on the HWY and I had the cruise at 75 and I'm at 55, and I hit resume, it jumps down two full gears and revs to 5K. It throws my head back because I'm not expecting it and my wife gets pissed because she thinks I'm just hotrodding. VERY annoying and unnecessary. My truck should KNOW if I'm pulling something that requires it to kick down like that. Besides, I would think that it's not a good idea to tow with the cruise on.
Most cruise controls work on a speed sensor and then activate the throttle using a vacuum operated canister. With that setup, the throttle is gradually opened. Our Tundras are totally electronic so when the cruise needs to speed up the truck, it happens instantly with no vacuum lag at all.
I agree that the cruise is annoying, but our trucks are NOT underpowered, especially for what the size of the motor is. I have no problem out running just about every other pickup out there, unless it has a BIG inch motor. The Tundra motor is very efficient and FAST for it's size.
Sorry for the small rant, but I it really irks me when people start bashing the Tundra for being underpowered. I drive a lot of different trucks and have always considered the Tundra very quick and light on it's feet. If you want to know what underpowered is, go drive a 4.6 Ford F150 sometime. You will find the Tundra really isn't so bad after all.
If you want something with TONS of power, then go buy a Dodge SRT10, then the only thing you won't be able to pass is a Dodge dealership or a gas station.
Phil
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Cruise Control Adjustment...
Linear Mode
