Lexus GS 2013+ :: Cruise Control Has Plus / Minus 2 Miles Per Hour Variance From Its Set Speed
Dec 25, 2014
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.
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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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While going a steady speed, my speedometer will fluctuate up and down around 3 miles per hour. It will happen at any speed.
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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 got a used 2012 Toyota Camry LE a week back, and I could feel that my Car Pickup speed is very poor and its struggling and jerking to reach 40 miles/hour speed, once reached 40 miles/hour then it runs smoothly.
I don't throttle more after a complete stop , but i could not see a smoothness or easy moving with my car. When I get to service station , they say its normal and they are saying i need to throttle more to get the right gear, as camry is designed like that.
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My 2004 Pontiac Bonneville has this problem sometimes when I start it up in the rain, if I start it up in the morning. It will sputter while I am in drive or reverse, and driving below 40 MPH. When I hit 40, it goes away and then will come back when I slow down or stop. It usually goes away after 20-30 minutes of driving.
This never happens when it's dry. My car runs smooth and normally when it's dry. When I took it into the shop, they could not find a problem.
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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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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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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.
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As odd as it may sound, our Prius salesman told us we should not use the cruise control on our 2010 Prius II for the first 1500 miles. We could not find any such warning in the manual. Did we just misunderstand or was the salesman correct?
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I had my transmission fluid changed because it was leaking from the pan. I did the job myself but called VW to confirm how much fluid I needed. They told me the wrong amount but we realized that after we did the job.. they did the repair for a huge discount and I only paid $200 bucks for the work for them to "fix" what they messed up. Volkswagen did it and I got the car serviced at the end of April basically. now its the first week of July and under 90 days since the car was service and now it is shifting hard between 2nd and 3rd gear or 35 miles to 45 miles per hour. The car isn't throwing a transmission code I have a vag com and there is no code coming up on that.
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My vehicle shows currently two awkward behaviors:
1) I can start the vehicle using the keyless start button without having to step on the brake pedal.
2) I can switch on cruise control. The green symbol appears, however, I cannot set a speed. The system simply seems to ignore that I press the set button.
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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.
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My cruise control will engage but not maintain set speed. It slowly loses KPH, 10 KPH every 30 seconds. What to look for?
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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.
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When I first got this car about 2 months ago, my current speed would be displayed in the MFD when the cruise control was set to on (not activated and in use). For some reason now that no longer happens and it just shows dashes. The only time the speed is displayed now is when I am actually using the cruise control. Is there a way to get that thing back to showing my present speed like it did before?
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I have a 2006 santa fe with th 2.7. The tail lights light up both films on both sides when you turn the lights on. Now the cruise control will turn on but it won't set the speed. I changed the brake switch and i tried to put it in the same exact spot. The old one was not sticking or anything. Now I was told the switch might need reset or something. I looked everywhere for shorts and sealed them up. Checked all the fuses which all are good. So im not sure whats going on. Now when you press the brake the small fuse will burn out.
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When I turn my Cruise Control "On" it will light up green on my dashboard, However when I press the "set" button to set the speed nothing happens. It was working fine a few weeks ago. Could it be a fuse? If so what fuse? How I can fix this? 2011 Sonata
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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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Cruise control on, set at, say 65mph. I want to lower the speed to 60mph. Tap down... click-click-click-click-click and watch the set speed number drop to 60.... then pop right back up to 65 and the car accelerates back to faster set speed. This has happened more than once now.
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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.
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