Faulty cruise control?
08-24-2018, 08:25 PM
#1
Faulty cruise control?
i just picked up my new RDX Advance and noticed on my drive home that the cruise control wouldn't hold the set speed while going downhill. It would gain 5-7 mph over the set speed. I'm coming from a Genesis G80 and its cruise control would apply the brakes to keep the set speed. Does the RDX not apply the brakes to keep the speed at the correct speed?
08-24-2018, 08:35 PM
#2
Advanced
I've had the same result as you. Since I don't use the cruise control on a daily basis I intend to address it when I bring the car in for it's first service. It is strange that on a vehicle as sofisticated as this that that a set speed can't be maintained within 1 or 2 miles of that speed.
08-25-2018, 08:39 AM
#4
Cruisin'
page 456 of owner's manual-
•On roads with steep downhill sections, as the set vehicle speed can be exceeded by coasting. In such cases, ACC with LSF will not apply the brakes to maintain the set speed.
08-25-2018, 10:48 AM
#5
This is not how I would expect modern cruise control to work. A set speed should be a set speed. I can see the fuel efficiency reason for this but it seems there are many other reasons to not have it work this way. Our 2016 X3 maintains the set speed both uphill and down. I'm really going to have to think about his when considering the RDX later this year.
08-25-2018, 02:33 PM
#6
believe 2012 Odyssey I drove recently would apply brakes to maintain set speed on a long downhill
08-25-2018, 02:43 PM
#7
Drifting
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This is not how I would expect modern cruise control to work. A set speed should be a set speed. I can see the fuel efficiency reason for this but it seems there are many other reasons to not have it work this way. Our 2016 X3 maintains the set speed both uphill and down. I'm really going to have to think about his when considering the RDX later this year.
My 535 did as well. Too, if you were doing say, 80 mph and hit a tunnel entrance with a speed limit of 50, yanking the stalk back 6 times through the detent would haul you right down to 50, using the brakes if needed. Acura does things differently from BMW. My wife’s Accord will also pick up more speed than I prefer under the same circumstances. The 2008 535 I had would maintain the set speed going up or down hill, even if that set speed would cause it to slam into the car in front that was going slower. My RDX won’t do that. If you wanted an X3 that wouldn’t do that also, you need Drivers Assistance and Drivers Assistance Plus options ($2200) that the RDX has standard, and, when I shopped, Nobody had any within 100 miles.
There are no perfect cars.
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