iwannam3
Active Member
The OTA fix would be to display graphs of throttle position, brake position and speed after a low speed front collision.
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Well there’s a thing, sudden unintended acceleration just happened to me
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DopeGhoti
Active Member
I would love to see the future where the OEM can issue an OTA fix to the headmeat of the large nuts behind the steering wheels of motorized conveyances.
hybridbear
Active Member
Have you tried this in your car? I did over the weekend. I was stopped and with my left foot on the brake, I then stepped on the accelerator & the car would move forward as the electric motors overpowered the brake pads. I then started rolling slowly along by gently pressing the accelerator. I then stepped on the brake and the car stopped, without releasing either pedal I applied more pressure to the accelerator & again the electric motors overpowered the brake pads.
Knightshade
Well-Known Member
If what you describe actually happened your car is broken and you should open a service ticket immediately.
Tesla: Claims of Unintended Acceleration Are 'Completely False' - ExtremeTech
Tesla said:
That isn't unique to Tesla either- virtually every modern car cuts power if the brake is also pressed, and has been doing so for longer than Tesla has been making cars.
Preventing power cut when left foot braking
That's a 2006 discussion of someone wanting to know how to DISABLE this safety feature on their VW at the track for example.
Or from 2009
How To Deal With Unintended Acceleration
This was before Toyota added that feature (they since have)- but it mentions BMW, Chrysler, Nissan/Infiniti, Porsche, and Volkswagen/Audi all offering that feature.
DopeGhoti
Active Member
I too have seen that notification on my screen when experimentally standing on both pedals. I can confirm that each time I have done this, the car does not move a centimeter- the "reduction" in apparent motor power is by all appearances to zero.
I have my car set to Creep, mainly as I have to park daily into a tight garage spot. It is so much easier to inch into tight spots when controlling the car with the brake pedal.
The same thing happened to me (Word by word) yesterday in my 2021 Model Y. So I believe you. I was not so lucky. Caused damage to the car, after it plunged 20 feet in a ditch. The Insurance estimate awaited. No physical injury to me or the passenger.
Knightshade
Well-Known Member
100% you hit the wrong pedal (or potentially possible but far less likely- you engaged TACC without realizing it.)
if you think otherwise contact Jason Hughes and take him up on his $10,000 bet.
You are 100% wrong. I was there, you were not. My foot was nowhere near either of the pedals.
I don't believe this guy at all. Claims most modern cars can't have gas and brake at the same time. Quite a bit of youtube videos with brand new cars doing burnouts. I guess they all have line-locks.
Be careful of the fanboys on this forum, Tesla can do no wrong, saying otherwise might even get your post deleted.
Knightshade
Well-Known Member
Then you should take him up on his $10,000 bet.
You won't, because you'd lose.
Same as everyone else SURE they did nothing wrong then the logs show they did.
Some actually do... others have some special track or launch mode you can put them in to do burnouts.
In normal use though in modern cars the brake being engaged turns off the throttle generally, you don't have to believe "this guy" the companies that make the cars say so- it's usually mentioned explicitly in the car manuals.
And even when that wasn't true, brakes beat accelerator if you mashed both- multiple car mags tested this back when the Toyota unintended acceleration business came up...
The Unintended Acceleration Test - Motor Trend
That's from 2010.
Even a decade ago they mention 2 brands of car (Toyota and Hyundai) had already programmed them to cut ALL accelerator input if the brake was engaged. That's now standard on basically all new cars and has been for years.
And for the ones that didn't do it 10 years ago, the car still stopped by slamming the brakes, even when ALSO holding wide open throttle... on Hyundai, Nissan, Subaru, and Toyota cars it stopped in exactly the same distance as no throttle being applied.
In a Honda is stopping a couple feet longer with WOT than not. In Ford and Chevy it stopped a couple dozen feet longer but still stopped.
"unintended acceleration" in a modern car is user error.
100 percent of the time
DopeGhoti
Active Member
This is (in part) how I knew for a fact that all those "runaway Prius" events with folks saying "I was standing on the brake and it just kept going" were utter horse-puckey: Firstly the manual stated that depressing the brake and gas simultaneously was a way to force the car to charge the battery (with a caution of "don't release the brake first when doing this you dummy"), and secondly after the first time this was reported to have been happened all anyone would have needed to do is go into their car, turn it on, and observe that the car doesn't move when both pedals were depressed. The engine would rev slightly and power would go to the battery.
Many modern cars are "drive-by-wire" and have been for quite some time, and this is without even getting into how cars are engineered to fail-safe in this respect.
You need to read his post completely. If your foot didn't hit the pedal, you might have activated TACC by accident. That is activated by the stalk. Sometimes people hit the right stalk instead of the left stalk, and activate TACC, when they want to turn on their right turn signal.
Knightshade
Well-Known Member
The "computer" isn't the issue.
There are two, totally independent, measures of throttle input.
Unless both are positive and agree with each other the car does not move.
And even if all THAT happens, if the brake is pressed, the car ignores the throttle input entirely.
Unintended acceleration in a modern car doesn't require "one computer glitch"
It requires multiple failures of different, redundant, systems, to all happen at the exact same time and each to happen in a very specific way.
This is factually untrue (or at best misleading)- the only example of unintended acceleration in this regard I'm aware of was an older Chrysler that was only "hacked" by physically plugging in a laptop to spoon canbus commands.
It doesn't just "happen" on an untouched car- and was not done remotely (and was on a MUCH less complex and less secure computer system too)
(I think someone did this with a toyota as well as some point- but the hack was even more crude and again required physically altering the vehicle-something they didn't initially disclose when reported but later admitted)
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How can people not be able to control the accelerator in their own car.
I have a Performance 3. I can work the pedal to move the car ridiculously slowly without having to put the car in creep.
I suggest that, if you can't, a PRIUS might be a better option for you.
People are having some problems with TACC being activated before they arrive into the problem area. If TACC is on and your going 45mph and then you turn in to your 25mph street and forget that TACC was engaged earlier of course the car will drive overspeed as soon as it can. That is what needs fixed.
I believe the more recent firmware versions have an option to set the engagement speed for TACC.
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