2011 Hyundai Sonota Cruise Control: My new sonota's cruise control does not brake the vehicle when going down a hill. The car begins to increase its speed by over 20 km per hr and would exceed that amount if the brakes were not applied. Hyundai technical and customer relations people tell me that this is a normal feature. I am concerned that this feature is now a safety hazard and should be addressed by the Hyundai Motor Car company. In previous Hyundai vechicle that I have owned, the crusie control when going down a hill does brake the vehicle and performs as it should. Is this "non-braking feature of the Hyundai Sonotat 2011 GLS automatic cruise control system" normal. How can it be resoled. Thanks

If your cruise control cuts off when going up a hill and will not immediately reset, there could be a few different issues causing the problem. Here are a few things you can try to troubleshoot the issue:

1. Check the brake switch: The brake switch is responsible for deactivating the cruise control when the brakes are applied. If the brake switch is faulty or misaligned, it can cause the cruise control to cut off when going up a hill. You can check the brake switch by inspecting it for any visible damage or looseness and making sure it is properly connected to the brake pedal.
2. Check the accelerator pedal position sensor: The accelerator pedal position sensor tells the cruise control system how much acceleration is being applied. If the sensor is faulty or out of alignment, it can cause the cruise control to cut off when going up a hill. You can check the accelerator pedal position sensor by inspecting it for any visible damage or looseness and making sure it is properly connected to the accelerator pedal.
3. Check the cruise control system: If the cruise control system itself is malfunctioning, it can cause the cruise control to cut off when going up a hill. You can try resetting the cruise control system by turning the ignition off and then back on again, or you can try resetting the system according to the manufacturer's instructions.
4. Check for any other visible issues: Inspect the vehicle and its components for any visible issues that may be causing the cruise control to cut off when going up a hill. This can include debris or foreign objects that may have gotten stuck in the vehicle, or damage to the vehicle or its components.
   If you have tried these troubleshooting steps and the problem persists, it may be necessary to have the vehicle and its components inspected and diagnosed by a professional mechanic. They will be able to identify the cause of the problem and determine the necessary repairs.
   In addition to the above troubleshooting steps, it is important to check for any diagnostic codes that may have been stored in the vehicle's computer system. These codes can help to pinpoint the root cause of the problem and assist with the diagnosis and repair process.
   To accurately diagnose the problem and determine the necessary repairs, it is important to have the vehicle and its components thoroughly inspected by a professional mechanic. They will be able to identify the cause of the issue and provide a repair plan to get your cruise control system functioning properly again.

Cruise control only maintains speed by utilizing the accelerator. To speed up it increases it and during slowing is removes it. The cruise control will not apply brakes in the event of a steep downhill run. In this case the vehicle will start to accelerate in the same manner as if the cruise control was not engaged. But in theses cases, most cruise controls, once the speed exceeds a certain amount above the set speed, will auto-disengage as a safety feature.

It sounds to me like a problem with cruise control? Turn it off and/or unhook it, drive it a bit and see if accelerating problem goes away? If it does, you need to troubleshoot the cruise control. Any applicable trouble codes?
That sounds dangerous to me, I'd disable the cruise control till you find the problem.
I don't know what testing you have done?

On these case,to troubleshoot these problem,there are solved help links.Click the link directly and refer the details to solve these problem yourself,with help of diagrams:------
Ford ranger cruise control not working?

http://technoanswers.blogspot.in/2012/02/ford-ranger-cruise-control-not-working.html

----------- Horn and Cruise control quit working?

http://howtobyme.blogspot.com/2011/11/horn-and-cruise-control-quit-working.html

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Horn and cruise control not working on Plymouth Grand Voyager?

http://howtobyme.blogspot.com/2011/11/horn-and-cruise-control-not-working-on.html

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Horn and Cruise control quit working on 2003 Jaguar S-Type? http://howtobyme.blogspot.com/2011/11/horn-and-cruise-control-quit-working-on.html

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Cruise Control stops working, Excessive cranks to start the engine and RPM goes max 2500 http://whoisbyme.blogspot.in/2012/07/cruise-control-stops-workingexcessive.html

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Cruise control stop working on 1994 Ford ranger? http://technoanswers.blogspot.in/2012/02/cruise-control-stop-working-on-1994.html

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Cruise control not working? http://schematicsdiagram.blogspot.com/2011/12/cruise-control-not-working.html

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1996 Ford Explorer: Cruise Control Wiring Diagram?

http://schematicsdiagram.blogspot.in/2012/06/1996-ford-explorer-cruise-control.html
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These will help.
Thanks.

Since this should still be under factory warranty I would check with the dealer first. Could need to have the computer re-programmed.

First I'll assume you haven't read the owners Manuel, Cruise control is not perfect on any vehicle. if coming to a hill put foot on gas to help rpm, going down hill put foot on brake to keep same speed, cruise control operates off of engine vacuum. Speed sensors can be affected by putting on smaller or bigger tires than what is on drivers door.

going down steep hills will all but over ride a cruise control, since the motor is trying to keep the vehicle slowed to what your desired speed that you set , unfortunately this doesn't always work,, as your speed increases, the motor can't keep the speed reduced, when you apply the brakes, the system shuts off, cruise controls were meant to be used pretty much on long flat surfaces with Low inclines ,,

Hello. If the engine light or ABS is on then the cruse control will not work.

You sould have recieved a "recall" notice in the mail about the cruise control for fire and failure issues. they are adding a fusable link where the cruise control harness connects to the brake master cylinder. if you have not had the recall performed yet you should SERIOUSLY consider getting it done, mainly so it doesnt catch fire, but "could" be the result of the failure you've been experiancing! btw, almost ALL Ford vehicles have been affected with the cruise control recall. hope this helps!

Simple answer, no, it will not most likely cause any increased wear to your engine or transmission. Yes, it is normal for the engine to rev while climbing a hill while in cruise control.

The cruise is designed to be used on flat (or semi-flat) stretches of highway at 55mph or higher so you don't have to hold the fuel pedal the whole time and your foot doesn't get tired. The cruise control system will try it's best to keep your vehicle rolling at the set speed, increasing/decreasing the throttle to compensate for changes in engine load.

If you are driving with cruise on, try lightly putting your foot on the pedal and you might notice that the system will actually move the pedal itself. If you are in cruise, and you come up to a large hill, try putting your foot on the pedal and getting it up the hill on your own w/o cruise then resetting cruise once you are off the hill.

Also, cruise is not supposed to be used in moderate/ thick traffic or on country roads with a lot of rolling hills. The cruise control system is a "dumb" system meaning (not that it's pointless) but it will only change the pedal as the speed changes and it has no idea what's coming up next, even while you are already on the hill.

So, it is normal operation of the cruise control to try to compensate for a hill by constantly revving up the engine and letting it fall back down to try to keep moving at the exact same speed you set it for. If this is a bother, you can always use your foot to hold the pedal while climbing the hill normally.

Don't worry, it won't cause any increased wear and tear on your vehicle. I hope this helps. Good luck and don't forget to rate! Thank you!