Lexus LS 2007+ :: Dynamic Radar Cruise Control
May 21, 2015
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 brought my new 2016 ES350 last month and I love the car
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One feature I am missing is all speed DRCC. In my car the cruise disengage at 25mph. I see the feature I am looking for is available in some other higher models and the Lexus technology video's says 'when your call is equipped with all speed DRCC'.
I would like to know if it's possible to add this feature in my 2016 ES by any means? I searched and couldn't find any other useful info.
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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)
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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?)
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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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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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So yesterday we had a bit of snow north of the city. I was driving on the highway and suddenly my cruise control deactivated and I got a message to clean the radar. Then I had PCM flash every second or so. I was really frustrated because this is a MINIMAL amount of snow and it's not even below zero. I'm hoping that this isn't an ongoing issue with these cars? Any solution besides getting out of the car and cleaning it? When I got home I saw that there was a layer of ice on the Lexus logo on the front of the car.....
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I have a 2013 Avalon Hybrid and am having trouble while using the cruise control. The "sensor needs cleaning" goes off although the sensor has been cleaned several times. Also, the sensor sometimes doesn't register a vehicle in front of me. The Avalon has been looked over by the dealer (several times), the sensor was replaced but the problem persists. Because it works periodically, it's difficult to diagnose a problem. Also, the PCS warning goes off periodically. Not sure if that's a related problem. It has gone off while driving through an intersection with traffic sensors (not consistently).
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I've looked in the mounds of user manuals as well as searching here but can't find the answer to this question: How do you keep the EV screen showing on the upper dash after turning on radar cruise control? Even if I switch back to any of the EV screens the dang radar ready or the active radar screen takes over no matter how many times I go back to the EV screens. I have already set the option in setup to not automatically return to the previous screen on the 7" HDD screen.
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Is there a way to change the default difference on the dynamic radar cruise control from 3 bars to 1 bar?
I think it's annoying to have to change it every time that I start the vehicle and activate cruise control.
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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 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 have a 2007 LS460 and one issue I have, which could be costly unless I'm paying attention, is the cruise control does not perform automatic downshifting like my Honda does. In fact, my speed can increase by about 10-15mph going downhill, which a couple of times I've been lucky to realize my speed is increasing and downshifted manually and sure enough there was a speed trap. I really don't like driving by luck, if you know what I mean.
Is there something that is causing this? I do not recall that it has ever worked correctly...
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I just noticed the other day that my cruise control stopped working.
The cruise light will come on, but when I try to set it...nothing. The speed just drops off.
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I have a 2010 prius v with adv. Tech. I noticed that I cannot turn off radar if I want to use regular cruise control sometimes when there is denser traffic. I know that it can be turned off on a Toyota sienna if you press and hold the radar distance button. I've tried with the prius, no luck.
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I found two times the cruise control auto on by itself while I was driving on the road.
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My girlfriend and I were riding in her 2007 Camry SE about a week ago on the highway. She pushed the button on the cruise control switch to turn it on, and the button popped out of the end of the stalk (it did not completely come out, but popped out about an inch). She pushed it back in, but it won't turn the cruise on now.
What all is involved in replacing this switch? I was assuming it was as simple as removing the bottom rear cover on the steering wheel and swapping it out, but I wanted to check beforehand.
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The Crusie control has a habit of not always operating. Sometimes it will sometimes it wont. I have tried switching off the ignition and restarting without success.
On occasions after not working for 30 or 40 miles it will start working again. Difficult to get the dealer to do anything as they cannot replicate the fault.
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My 2007 Santa developed these symptoms recently and need to know if they are related or independent.
1) ESC off message is always lit and button doesn't work.
I checked and replaced fuse 19 in engine bay. Light didn't lit up for next 500 feet and I was able to turn and off with ESC button near knee panel. after that it was back on. My guess is one of 2 Or both 40amp relays in engine bay for ESC is/are bad.
2) Cruise control on/off works but Set doesn't and Cruise is inoperable.
Don't see any fuses for cruise control in engine bay or interior fuse panel.
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In the last 5,000 miles or so, my 2007 Prius has been really burning oil and intermittently the cruise control stops working. No warning lights. Car sounds and feels as usual. 235,000 miles on it. Water pump, thermostat and drive belt replaced 3/2013. Check engine light has been on since about then and diagnosed then as either catalytic converter and/or oxygen sensors and I chose not to fix those as was told not necessary until.
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I bought my second used 2007 chevy silverado 2500hd classic LT 6.6l diesel and the cruise control and elevated idle wont work. have done tons of reserch. And have found nothing useful to my situation. have found everything from a simple fuse to a module which is expensive. i have checked that all my brake lights work, have checked all fuses and even bought a new column switch for the cruise control. That didn't fix it.
I am thinking the brake switch or possibly something with the trailer whirring might be shorted or installed incorrectly.the reason i think it has something to do with the brakes is it is a common denominator between the cruise control and the elevated idle. if elevated idle is on and you touch the brake pedal at all it shuts off and idles normal on a working system. which i know from my previous identical truck. the brakes also shut off the cruise if touched at all. i have had a hell of a time trying to figure this out.
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