Elantra MD (2010-15) :: Cruise Control Does Not Slow Speed Down When Going Downhill
Aug 26, 2013
I have a 2012 Hyundai Elantra and have noticed that my cruise control doesn't slow me down when I am going downhill, is this normal?
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Aug 26, 2013
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Prius (2010-12) :: Downhill Cruise Control No Longer Holding Speed
2012 Prius with 10K miles.
One of the features I really like over the '06 Prius is the ability of the cruise control to hold the set speed on downhills (until the battery fills up and it switches to compression braking "B" mode, but that's a different topic).
After taking it in for the 10K mile service, it no longer engages regenerative braking on downhills with cruise control set. This is on the same hills where previously it would hold speed.
Did Toyota do a software upgrade that disables this feature?
Elantra MD (2010-15) :: Cruise Control Will Not Set The Speed
So my cruise is giving me issues, won't set the speed. Turns on and off no problem but set and resume do not work. However, turn off the car and then re-start it and the cruise works again. I know the radio is only up to 60k.
View 19 RepliesSonata I45 (LF 2015+) :: Cruise Control - Transmission Will Downshift To 4th Speed Whenever Go Downhill
The cruise control on my 2013 works as I expected.
However the cruise control on my 2016 Sonata does not.
When driving at highway speeds (65 to 70 mph) in cruise control and the shifter set on "D" (drive) the transmission will down shift to 4th speed whenever I go down hill.
This might be intentional as a way to keep the car from exceeding the set speed, but I have never heard of this and it would seem to place more wear an tear on the transmissions.
Do the down shifting is engineered in or if it is a service problem that I need to have addressed...
Prius (2010-12) :: Car Revved Up While Going Downhill With Cruise Control
Twice now, while going downhill hill (steep grade on freeway) my Prius has revved up to over 4,000 RPMs with the cruise control set at approximately 65 mph. The noise of the engine was my tipoff and I immediately had to turn the cruise control off. This just doesn't make sense to me! Seems like this could be a potential problem for those of us utilizing cruise control!!!
View 15 RepliesPrius (2010-12) :: Battery Charging While Going On Downhill Especially With Braking Mode / Cruise Control On?
Curiosity question. I've noticed that on a downhill of a couple miles, especially in "braking" mode or with the cruise control on, the motor/generator and engine are used to keep the speed down and the battery gets charged to the very top quite quickly. That's good!
On a really long downhill, will the motor/generator still be used for braking and the excess electricity discarded to keep from overcharging the battery?
Lexus RX 2010-15 :: 2014 RX350 - No Speed Control Going Downhill With CC At All
I have no speed control going downhill with CC at all. Dealer says this is normal. I've had two other Lexus GS models and when going downhill they would downshift and use the engine to maintain a constant speed. My Mercedes does the same thing when going downhill it downshifts to maintain a relatively constant speed. Is this normal with the RX? if so, what a disappointment.
View 1 RepliesElantra MD (2010-15) :: Cruise Control Would Not Set
Ok, today on my way to work, I got up to speed and turned on the cruise control. It worked fine. I then stopped on my way to work to get a bottle of water. I got up to speed and went to hit Set. Nothing would happen. I ended up getting off at the next exit and turn off the car completely. Restarted the car and got back on the interstate. Got up to speed, turned on the cruise and hit Set. It worked. On my way home, no problems. It was just strange.
View 21 RepliesElantra MD (2010-15) :: Cruise Control Not Working
Won't turn on and if and when it does turn on it won't set.
View 16 RepliesPrius (2010-12) :: Cruise Control Based On Load Not Speed
Not sure if this should be under the technical section but is there a way to modify the cruise control to be set to a position on the hsi and not based on the speed. After all it is all electronic.
View 7 RepliesElantra MD (2010-15) :: Cruise Control Randomly Shutting Off
Have cruise control randomly shut off? Mine does it maybe 1-2 times a week and I use it quite extensively. It pretty much only happens while on the highway. I know I'm not accidentally tapping the break, because it'll happen even when I have both feet away from the pedals.
View 30 RepliesElantra MD (2010-15) :: Cruise Control Sometimes Does Not Work On Highways
Every day I have to drive on highways and obviously I use the Cruise Control BUT sometimes it doesn't work. To make it work again, I have to stop , turn off the engine and then turn it on. After doing that, the cruise control works again... It is an intermittent problem. I have my car for 4 months and I have got this problem about 10 times. Am I the only one to have an intermittent problem with my cruise control ?
View 8 RepliesPrius (2010-12) :: Speed Range Of Dynamic Radar Cruise Control?
Is the drcc on the 2013 full-speed range or is it partial speed range? (will it bring the car to a stop or does it only work above certain speeds?)
View 18 RepliesFord - Explorer :: Cruise Control At 35 MPH - Braking Downhill Shuts Off Engine
I drive a 2005 Ford Explorer (automatic) with 84k miles on it. Recently when I was driving on cruise control at 35 mp/h down a hill and applied the breaks to make a turn, the engine completely shut off. The lights came on, the power steering went off, the engine had shut off. I pulled over, turned the key off, turned it back on and it started no problem. I drove it for 3 days without problems (and without using cruise control of course), then I took the car to a shop. They ran diagnostics on it, test drove it, but couldn't find anything wrong with the cruise control or the transmission. I don't think they tested this driving downhill as the shop is not in a hilly area. Tonight, I went down the same road again, 35 mp/h in cruise control, slowed down for the same turn, and the engine shut off again exactly the same way it did before. What this could be?
View 7 RepliesFord Excursion :: Cruise Control Engaged - Chugging / Vibration Going Downhill
I like to drive with cruise control engaged but I find I can't do that in my new (well, 182K 2005 6.0L) Excursion. It's holds speed just fine, but if I top a rise and start going downhill - basically when no effort needed to maintain speed - it starts chugging and shaking the whole truck real bad. It feels and sounds bad, can't be good for it (or so I've assumed in my head). It's a real staccato feeling as if fuel is being applied less than a second, stopped, reapplied. Is this something unique to the diesel (my first diesel), an issue with the cruise control (vacuum, electronic?), or what?
View 9 RepliesElantra MD (2010-15) :: Cruise Control Disengages With A Significant Bump
My cruise control disengages with a significant bump.
View 14 RepliesFord Transmission :: Cruise Control - Shift Or Lock / Unlock Trans On Ever Slight Downhill
Just picked up an Excursion with the V10 and 4R100 (2001). Drove it in to work to day and while on the freeway cruising on cruise control about 60 it seemed to shift or atleast lock/unlock the trans on ever slight downhill you encounter on a city freeway. Just light humps in the road. Does this seem normal? RPM's would be just shy of 2000 then I'd hit a small decline and would shift to 1600 or so then back up when it leveled out.
View 14 RepliesFord Super Duty (1999-2016) :: Surging When Doing Silent Downhill Using Cruise Control
My 2001 F250 with 5.4 gasser surges when it rolls downhill when using the cruise control. It does not do that when it is going up hill or on flat level highway. Why it does that? This is only when I use cruise control.
View 3 RepliesLexus GX 2010+ :: Going Downhill - When Step On Brake To Slow Down RPM Jumps From 2000 To 4000
There is a mile of downhill on my way to work every day. I oberseved that when I step on the brake to slow down, the RPM jumps from 2000 to 4000 all of a sudden and stay there for a few second. Without my foot on the brake, the tachometer stays around 2000 rpm. Is it normal? Why does the engine do this?
View 3 RepliesLexus GS 2013+ :: Dynamic Radar Cruise Control Fails To Slow Down The Vehicle
Symptom: Dynamic Radar Cruise Control (DRCC) fails to slow down the vehicle, (with slowing down or stopped vehicle in front) when DISPlay button on the steering wheel is pressed several times after DRCC is set.
The issue was tested several times with my 2015 GS350 AWD, Canadian model. Maybe it only applies to me, or perhaps it applies to all models with Lexus Dynamic Radar Cruise Control equipped.
Tests: Speed up, turn on main cruise control, and start DRCC when there's no vehicle in front, set to desired cruise speed, set the distance range control to desired range. Now, press the DISPlay button on the handle a few times (5-6, maybe flip through the whole menus, long and short presses. You are all set. Now, drive up to a stopped vehicle or moving vehicle closing to a stop (or slowing down). 4 to 5 out of 10 times, I found out that the DRCC does not sense the vehicle in front, not applying the necessary brake. The screen (where vehicle in front is pictured) shows the vehicle in front at times, other times, The sensing screen is just left blank. Still, the vehicle is on cruise mode and keeps the set speed, however the it acts like a regular cruise control, NOT the dynamic radar one when approaching a slowing down vehicle. At times, pre-collision warning beeps if the vehicle in too close, still no brake. When I says 4 to 5 out of 10 times, the other 5 to 6 out of 10 times, it works beautifully as it is suppsed to. (i.e. slowing the vehicle accordingly)
I tested several times at the 45km/h (30 miles/h), just enough to get the DRCC on, day and night, the vehicle failed to slow down in front of a slowing down vehicle (or a stopped vehicle). At times, the pre-collision warning beeps when the vehicle is at a close distance. I am suspecting that when DISPLAY button is pressed during Dynamic Radar Cruise Control is ON, DRCC fails to work as it should. Not every time, but several times.
I first experienced this at a highway moving at 100km (62 miles) and almost rear ended the vehicle in front if I didn't quicky changed the lane, and warning beep alerted.
I know I shouldn't rely on these technology and I do not, however, if this is a software issue, it should be corrected.
I've been trying to find out when exactly this issue would happen and record on my phone, but I couldn't. I was able to record one occasion on my cell phone, however, it was at night and the vehicle in front was actually a parked vehicle with the rear lights off. (although I think it should've still worked). I am still trying to come up with exact occasion for this issue and get it on video. (Speed/DRCC ON timing/AC/Lights/etc)
Ford F-150 - 1997-2003 :: Cruise Control - No Coasting When Put On Brakes Slightly To Slow Down
All, i have an issue ( or at least i think its an issue) with my 99 f150 5.4. When i use my cruise control, i notice when i put on the brakes slightly to slow down, it feels like its not coasting because you can feel the engine still engaged and wont coast. I think this happens even without the cruise on. What this could be? I have the latest update on the cruise control harness. I believe that was for power always to it even in off, causing fires.
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