Question about Hyundai Motor 2004 Sonata

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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

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I just bought a 2011 Sonata and am experiencing the same problem. Going downhill with cruise set at 55 mph; speed increased to 70 mph and was still accelerating (from the downhilll grade) when I finally pressed on the brake.
This is not normal. My Honda Accord never varied from the cruise setting by more than 3 or 4 mph ... going uphill or downhill.

Posted on Oct 31, 2010

Testimonial: "It would appear that Hyundai has been negligent in not fully addressing the braking function on the cruise control in the 2011 Sonata's. "

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Eu tenho um sonata 2011 e nao consigo acionar o piloto automatico dele ja tentei inumeras vezes acimei o cruise e nao da em nada se alguem ai puder me da uma dica vlw

Posted on Apr 07, 2013

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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.

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