Lexus LS 2007+ :: LS460 Cruise Control Does Not Perform Automatic Downshifting
May 14, 2016
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'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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Dealer told me needed new control arms as the bearings are wearing out. Was quoted a little over $3k. Doesn't really bother me bc it only makes a clicking noise when I apply brakes hard but concerned about safety issue. Surprised a car like this would need new control arms with only 70k miles on it.
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Got our 2014 back in March and it still hangs in fourth gear after downshifting with the cruise on. Downshifting from 6th to 5th for small hills is fine but on steeper hills when it drops to 4th and hangs in there uncomfortably long.
What I've been doing is switching over to manual and bumping it up to 5th and then 6th. When I don't, it will hang in 4th and rev high and then eventually shift into 5th and 6th one right after the other long after the road has leveled out..
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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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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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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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While driving to Calif. from Ariz., on I 10, dropping down into Indio on a mild grade, at 75mph, when I came to the steepest section the transmission down shifted, rpm's rose and it felt like the engine was keeping the mph at the set speed, by providing more drag which it did. I have had many auto with transmissions and cruise control, been descending steeper grades, and never have had this happen. The vehicle is a 2014 Avalon. It would be a nice feature if it had been designed to do this auto braking, but I don't think that it ia supposed to do this?
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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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Since getting my '07 SE V6 in Oct/2010, I haven't done any tune-up on the whip. It's typically 30,000 miles or 2 years from my understanding on how often a tune up should be performed but you never know.
I'd like to know what exactly getting changed or tinkered with in getting a tune up for Camry and if the benefit was clearly noticeable in certain areas i.e. rough idling or gas mileage.
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I drive a 2009 GS350 and I just noticed that when I start the car and decide to get out while it is running my Key FOB doesn't perform any of the functions suck as lock the doors or open the trunk. I wasn't sure if it was supposed to do this as when I leave my car running to warm up for a few minutes I kind of want to lock the doors.
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Where the ECU is located? Can't seem to find my manual.
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I have tested 07 UL package a while ago, really liked the car, how it drives, really quiet, very smooth, good acceleration, very comfy etc. the only concern for me is it spacious enough ? I'm driving around 90% in town, how is it on a long trips with 2 - 4 people.... ?
Immediately after I parked ES 350, I have tried LS460 07 AWD, somehow it felt under power for me, maybe cuz it's a awd.. ES was faster in my opinion. It had it 100k miles on it, the car felt really solid like a rock, safer, but slower. Maybe a RWD would feel differently.
My plan is keep the car for 5 years or so, I'm also concern about maintenance costs too. As today I'm pretty much can get a LS 460 07 or ES 350 UL 10-12' for the same price.
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I took it in to Charles barker Lexus (our dealer here) and they said the water pump was leaking, the front struts were totally blown out, and the 2 belt tensioners had some free play.
Got the dealership I purchased from to pay for the water pump but they would not cover the struts because they said the car pass inspection so they don't believe they are damaged.
Got and independent shop to replace the front struts with kyb 551122 for $400 parts and labor. While they were under the car they said the upper and lower control arms looked newer as if they were replaced recently
Got all wheels balanced at a little small used tire shop small change. The vibration that started at 60mph now starts at 65. Question is are all tire balancers created equally?
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I purchased my first Lexus in October, a very clean 2009 ls460. In colder weather (for Tucson AZ) in the 30's to 40's I notice that the transmission slips while the car is accelerating between 2nd and third gear.
By slipping, I mean as the car shifts between 2nd and 3rd it feels like it goes into neutral for a half second, so rpms spike 500 rpm, the car stops accellerating, and then catches as the next gear is finally engaged.
It does this pretty much every day when the car has been sitting overnight on the first steady acceleration after backing out of the garage. It only does it once, subsequent shifts a re pretty much normal.
Every once in a while coming out of a parking lot after say grocery shopping, it will do it again, just once.
I dropped it at the dealer and they of course could not replicate it.
I made a youtube video which shows it sort of. besides the rise in engine rpm, you feel a lurch in the acceleration as it drops down into gear.
Service records showed the trans was serviced just before I bought it.
Transmission slipping - YouTube
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My wife has a 2007 LS460. Some dummy at a big box store tied down the trunk to get a chair home by threading rope through the latch mechanism. Needless to say, the trunk will not close. Not with the button or manually. I tried the disconnect battery thing. Nothing. The lid goes all the way down.
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Our 2007 LS 460 (98k miles) drives like a dream except from about 75-85 mph we have a general vibration. Its most evident in the steering wheel but everything in the car has a general vibration. It may have been there for a few months now, but I felt it when I drove it yesterday. There is absolutely no vibration below 75 and none above 85 (I was cruising at 90 mph and the car was solid). I tried to do some investigating:
Tires: Appear to be fine in regards to wear and the tire pressure is about the same in all of them in the mid 30 s. Alignment is fine and the car does not pull to any side.
Brakes: New brake pads about 10k miles ago at dealership and work absolutely fine.
Transmission / engine (I hope not): The car is 7th gear at that speed but it usually is anytime above 50 mph so its quite odd. We don't lose power and no lights are set off.
Body work / damage: doesn't appear to be anything on the front or sides of the car that cause this.
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I've been waiting for to trade in my 04 Acura TL and move up drastically to either a 2010 GS450H or 2010 LS460 Sport. Both are driving me crazy because I absolutely love the look of both cars and the more I keep looking at the wheel photos makes it even harder.
I have 3 kids but 2 of which are older so size doesn't matter. I do prefer the GS due to the super sleek looking and 20" are a win BUT the LS on 22" with the air ride and data controller is a super win!!! not to mention the 19 speakers are better then the 14.
I know that I have to drive each car and I have not yet. Also pricing is pretty close for each car and it looks like the gas mileage is also pretty darn close so I don't believe that is an issue either way unless I'm wrong??
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I have a 2009 that seems to have issues in the lower gears, I think that I have a transmission issue.
When I'm coming to a stop, I feel the transmission downshifting from about gear 3. It's not wildly jerky or abrasive, but it's not smooth either (or I wouldn't feel it). When it downshifts, after it engages (or torques down for lack of a better term) it feels as if it releases a bit, which makes me have to compensate with harder braking (again, not saying I am slamming on the brakes, but I have to brake harder so it doesn't feel like I am now going to coast into the car in front of me). It doesn't feel like the transmission is going to take off on its own, but it definitely feels like it has a certain threshold it wants to stay above.
In the loaner I have (RX), when coming to a stop the best way I can describe it is it feels like the transmission has completely disengaged and I feel NO transmission downshifting at all. The only way I get this type of braking in my LS is if I throw it into Neutral and take the transmission out of the loop. On the way to the dealership this morning to drop it off for other issues, I was at a stop light and went to accelerate and it felt as if it skipped a gear because I was stalled for a second (acceleration wise, not that the engine turned off) before it took off as it should. Also my acceleration seems to be a little hesitant when starting off .
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I have a 07 Ls460. When downshifting from second to first there is a click that is sometimes a clunk. Lexus has replaced the trans with no change. They have cleaned and lubricated rear suspension bolts and replaced the rear shocks and springs and the differential mount. Again, no change.
This started at about 80k and continues at 123k. They have checked motor mounts, transmission mount and repacked the driveshaft spline. When the car is lifted into the air and the weight is off the suspension the noise will go away for a few days.
This noise has also been heard occasionally when rolling off the gas between 20/30 mph and then reapplying throttle. Lexus mechanics and area reps are at a loss to diagnosis. I have driven a 2008 loaner and it had the same noise.
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Got in my 2007 LS460 and it wouldn't start. No power, no clicking, nothing. I checked the battery terminals and noticed they has some corrosion so I cleaned them and reattached. Nothing. I found that if I jiggled the positive cable the power would light up my dashboard with every light / radio, but it still wouldn't start....and I had to disconnect the cable in order to turn the power off. I had the car towed to a trusted Toyota/Lexus repair shop I've used for 15 years. They connected the cables to the battery and it started right up....but the power steering is out. They tried multiple things to get it working with no success. The only option now is to replace the electronic power steering unit.
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