Lexus RC 2015+ :: Cruise Control Turning Off Every Time
Jun 18, 2016
I'm kind of up against the clock. I am sure this answer is in a book in the car. But that book looked pretty thick.
My husband just told me that he did not want to take my car to the ball game because he can't stand the cruise control turning off every time it gets even close to a car (yes, I understand what this may mean, but I'm not driving with him and he is a grown man).
Is there a way to disengage the automatic turn off on the safety cruise control feature? He likes to be the one in control I suppose.
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I just got a new 2015 Prius C Three and have been reading up as much as possible. I wanted to know if using cruise control would give me better MPG. If it's just a matter of 3/4 mpg difference, then I would use the cruise control to rest my feet. But if its a big difference, then I would avoid cruise control.
My daily commute from Germantown, MD to Alexandria Va and back is about 40 miles each way: total 80 miles. 90% of that highway on I-270 and I-495. I leave after morning rush hour and again drive back after evening rush hour.
Last couple of trips without cruise I have been getting around 50~52mpg.
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I have been using ACC a lot during my daily commute, it's really an effortless way to drive the car on a daily basis.
One of the issues I have been running into with it is that sometimes when the car in front (recognized by radar) accelerates and immediately decelerates to a quick stop my Sonata's ACC does not react and apply the brakes fast enough. The car will basically apply some braking power (~50%) while very quickly approaching the car in front, all the while triggering the rapid beeping of the Collision Detection system. Everytime this happens I have always had to manually intervene and apply the necessary braking power to stop short of hitting the car in front. This is pretty ridiculous to me since if the car KNOWS that it will crash without additional braking, and has the ability to apply the brakes, why doesn't it do so properly?
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I have a 2011 KIA Sorento LX (auto, 4-I). I'm very happy with my Sorento except for one problem. The cruise control will not set properly all of the time. I turn the cruise control on, get to the speed I want and press the Set button down but some times nothing happens. When this happens, I have to press the Cancel button and then press the Set button down and the cruise control will then set. Also, pressing the SET (-) button down to reduce speed once the cruise control is set will some times cut the cruise control off. The cruise control light does not go off but you have to reset the speed. My dealer says they cannot duplicate my problem and cannot fix it until it completely breaks.
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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...
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Just bought f150 Super cab and want to tow a 28' Heartland travel trailer ultra-lite. (5290lbs unloaded). We have always used cruise control. What are your thoughts about tow haul? Should we always use tow haul when towing? Should we use it only on hills? Can we use cruise control at the same time as we are using tow haul?
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I love the car and SCC is one of my favorite features. I've had good experience with the SCC most of the time - if car in front of me is moving and then stops, it reacts well. (Also was pleased to learn I can resume SCC from a stop by just tapping the accelerator, no need to hit resume like the LCD screen implies).
However, the one situation is when I'm going like 55mph, and up ahead there's a car stopped completely. I'll see a thing on the dash that the SCC recognizes there's a car ahead, but it won't hit the breaks till the last minute. Truthfully, I end up hitting the brakes myself in most of these situations.
I've got the longest distance selected (though i've tried it with short following distance too) and my car is a Limited 2.4 GDI.
SCC stops fine if slower car ahead stops. Seems a little risky when car ahead is already stopped (waits till the last second for brakes?).
I've also tried changing the setting for cruise control response from "normal" to "fast"...maybe i'll try "slow?"
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Is it ok to turn off traction control all the time? will it make me slide around more in wet conditions? will it affect fuel economy?
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What are the most and least optimal times to use cruise control at highway speeds?
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It started with the cruise control turning off every once in a while. Then it would only stay on for 7-8 seconds, then eventually it would turn on, then shut right off. Now it won't even turn on.
When I did the diagnosis sequence (On, Resume, Coast, Set....) it blinked 3 times saying "Bad deactivation switch or circuit". So I replaced the blue switch on the brake pedal and it still doesn't engage.
It's a 4.0 liter with a manual tranny. I've been researching this a lot, and it seems in 2007 they changed up things probably because of the big recall.
I don't see any kind of deactivation switch around the master cylinder. It seems that was in use until 2006 or 2005.
I see a different kind of switch on the clutch pedal, thinking it must also have a deactivation switch. I see a long spring loaded type of switch with about 5-6 wires coming out of it, but I can't find any info on the web about that switch.
All three of my brake lights are working. It seemed to deteriorate rather quickly (Over the course of 3 days) and now it's completely dead.
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I have a 2004 Pruis. Lately I have been noticing a problem with the cruise control. Often when I press the button to turn on the CC it will not come on, but if I turn the steering wheel to the left a bit I am able to turn on the cruise, sometimes when I turn the wheel back it will continue to work and other times it will not. I tried to search and found others posts about prius CC but couldn't find anything that included all of my symptoms.
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We've just had our first few autumn days where a heavy dew settles on the car when the temperature drops in the evenings. When I left the restaurant last night, the moisture was so thick on the outside of the glass I couldn't see out the rear window. I turned on the rear defogger and it was soooo slow. It took five minutes before you could start to see the wire lines in the glass appear and 20 minutes to clear. None of my other Lexus' have been this slow to clear the rear window.
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Had an issue with "check" engine light turning on and "cruise" control light flashing, intermittently. Dealer said we had dirty oil contaminating some solenoid valves in the system but we had just done an oil change and do so every 3-5K (car has 170K). They recommended switching around the sensors and doing an "oil flush" with another oil change. The warning light problem hasn't recurred, in the past month, since we started giving the gas cap a few extra turns after a fill-up. We're getting ready to buy a new car and don't want to give what might be a serious problem over to the next owner.
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It seems to me that the RCF is very poor at downshifting. I have owned the car for around 4 months now. If I am cruising along at around 30 to 40 mph and really push the pedal to the floor it honest to God sometimes seems to take a full 2 seconds to respond. It pauses, then downshifts and picks up a little speed, and then it finally goes. It drives me crazy! If I am already in a lower gear and punch it, it goes immediately.
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Do our cars have a separate cruise control Module? I drove a new 600 the other day and found that the radar (adaptive) cruise will bring the car to a full stop. My 2009 will not. It deactivates at around 25mph. I emailed another 2009 600 owner who is overseas. He said his also comes to a full stop. So I'm wondering if I can put in a new module, or an overseas module, and get the results.
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The other day I tried to do the nav hack and dvd playback in motion. I read through the instructions multiple times and followed them correctly making sure to cut the right wires. At the end, the only thing that worked was the dvd playback. I even tried two different switches but no luck. Over the weekend I noticed that cruise control wasn't working. When I press the cruise control button you can see the icon in the dash but you can't "set" the speed.
So today I plugged everything back to how it was, but still the cruise control does not work. I think it has something to do with the VSS. I did search, but I only found one other guy that had the same problem but it was never posted if he solved it.
I checked all the fuses under the hood and under the dash but they are all okay. How to reset the VSS or where the fuse for it may be? I'm going to try unplugging the battery and seeing if that does anything.
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I was driving at 65mph and decided to coast and slow my speed to 50mph, as there is congested traffic ahead. I know the radar will adjust my speed according but I wanted a slower set speed anyway. I held the cruise control lever in its downward position (thinking it was going to cause the car to coast and slow) Oh Oh! This thing is applying the brakes hard! I instinctively press the gas but it kept decelerating, no affects at all except the tranny downshifting or engine revving. I couldn't tell which, the radio was loud and it happened so quickly.
Moral to the story- I guess I should have read the owners manual. The manual say every .75 second the lever is held down the cars speed will be dropped 5 mph. My question is- since the car was applying the brakes and I overreacted and pressed the accelerator at the same time, was there a possibility of damaging a component? I know these cars are engineered extremely well.
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I have a 2015 RX350 with NAV. Is there away to stop cruise control from eliminating the mileage bar graph every time it is engaged?
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Does dynamic radar cruise control come standard on 2013-2015 RX350 F Sports. What options are standard on the F Sport.
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The cruise on my 2013 LS460 SWB RWD sucks big time! Both Dynamic and Normal cruise modes are WAY too sloppy in speed regulation. I was out today on a 55mph PSL two-lane with set speed of 59mph. On a long SLIGHT downhill, the indicated speed topped out at 70MPH!!!
BTW, tranny shifting was weird during this episode with a prolonged run at over 3k RPM. At any rate, that's 11mph over the set speed for the arithmetically challenged. So instead of tooling along at a maximum of 5 over the PSL as my 2007 LS would have done (set speed 59 + overspeed 2 = 61 indicated = 60 actual, so 5mph over PSL), I'm flying at 10mph over the PSL ripe for the picking by any county sheriff (and I saw THREE of them on that road, all with their radar on).
I figure my car's speed regulation (in both Dynamic and Normal cruise) is +11mph/-2mph for set speed of 59mph. That is crazy!
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I'm looking for a fully loaded AWD LS460 and haven't run across many with the dynamic cruise option. Was that option rarely chosen? It's time to add a second Lexus to the garage.
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