Lexus GS 2013+ :: Dynamic Radar Cruise Control Fails To Slow Down The Vehicle
Sep 25, 2015
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)
View 2 Replies
Advertisement
I brought my new 2016 ES350 last month and I love the car
.
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.
View 7 Replies
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.
View 1 Replies
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 Replies
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.
View 9 Replies
Does dynamic radar cruise control come standard on 2013-2015 RX350 F Sports. What options are standard on the F Sport.
View 1 Replies
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.....
View 2 Replies
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).
View 5 Replies
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.
View 8 Replies
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.
View 14 Replies
My cruise fails to engage, sometimes first thing in the mornings, sometimes in the afternoon, cold engine or warm, fresh start or on resume. After the car is turned off for a few, something is resetting it and it then works fine. Wondering if this has something to do with a faulty switch, fuse, or whatever. I've tried the cruise switch on the stalk in turning it off for a while, keeping it pressed in, turning it back on, everything.
View 6 Replies
I recently purchased a 2014 GS350 (CPO). One thing I've noticed is the cruise control has about plus/minus 2 miles per hour variance from its set speed as the car progresses over road inclines. This happens in Eco, Normal, and Sport modes.
I know +/- 2 mph doesn't sound like much, but I thought that the car would hold its set speed without much variance. Even with a manual transmission, my previous car (2006 Audi A4) kept its set speed better than the GS.
View 9 Replies
I was driving slowly with cruise control on when the check engine light came on, a few restarts and it still didn't go away. All fluid levels are OK, no other errors show up on start-up or driving and the car drives fine on both ICE and EV modes.
I'm bringing the car in first thing tomorrow. I called my usual Lexus guy and he didn't know what the problem could be either. I'm a bit freaked out, to be honest. Wish I had an OBD dongle to use with Carista.
View 4 Replies
I have a 2012 Prius v. It has intermittent, minor to serious problems that have not been detected by the computer. These include, when engine is READY, it won't recognize Drive. When in Drive is moves in Reverse, has locked keys in the car and does not always recognize key. The Cruise Control sometimes accelerates the vehicle on its own.
The Braking option doesn't always work properly. When touching the brakes the lights turn off. Sometimes when turning the lights on or off, the radio turns off. A new problem is that the brakes almost fail to engage, then, at the last minute they do. Toyota has sent a regional rep to take a test drive with computer diagnostics and found nothing. So, they won't do anything. These problems have occurred since I purchased the vehicle.
I have suggested that they trade cars with me while someone else drives it until they experience these events (actually the very first event was seen by a service person but that doesn't count, apparently); change computers; reprogram the computer. They won't do any of these things. It seems that if it doesn't show up on the computer when they are looking at it they won't do anything. There can be a long time between events and the events sometimes occur in clusters.
View 6 Replies
I installed an aftermarket cruise (Rostra) in my manual 2007 Corolla. Other than cutting the hole for the stalk the only real difficulty was getting my fat hands up under the dash to install the clutch disconnect switch. It certainly didn't involve any wire cutting or messing around with the ECM.
It's a long story, but through a sequence of events I have to opportunity to buy a 2010 base Corolla 5 speed at a pretty good deal. It also doesn't have a cruise control. I went tot eh Rostra website just to make sure cruise units are available and I looked at the installation instructions. Unless I read the wrong sheet, their instructions make it seem like installing cruise on a 2010 involves messing with the ECM wiring harness, moving connectors and a bunch of scary stuff like that.
It seems strange to me that the older car would be "plug and play" but a newer one would need changes to the main wiring harnesses. I'm not talking about a steering wheel mounted system where the clock spring has to be replaced, just a basic cruise.
View 2 Replies
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?
View 20 Replies
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.
View 19 Replies
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.
View 3 Replies
For the 4th time now my cruise control doesn't come on (had the car almost 4 months, with 6500 miles). The main "cruise" light comes on, but when I hit the "set" button nothing happens.
All except one time I had to remove the key before it would work again. One time I kept trying the "set" button and it finally worked. It's so infrequent, they'll never be able to recreate at the dealership. Not sure if I should just try to report it for documentation purposes, so if it happens to be permanent after warrantee expires hopefully it will be covered.
Back in the day, cruise was controlled by vacuum pressure but I don't know if that's the case any longer.
View 14 Replies
I've had my Sonata for six days, and I love it... Except... The cruise control doesn't work. At all. Never did. I tried pulling up on the brake pedal like another poster had suggested, but that didn't do a thing. Looks like a trip to the dealership is in order...
View 32 Replies
I own a 2013 C-Max hybrid and I notice that during long drives if i engage the cruise control, I don't get as many EV miles as I do when I have my foot on the gas pedal and take it off when i have reached my desired speed. Does EV mode not work in cruise control? My feet start to ache a bit with constantly having to press and release the gas pedal just so that I can generate some EV miles.
View 3 Replies
