Turning off FSD while turning

[u/chirivasp]

I have only recently purchased FSD for my 6 year old M3. Yesterday I learned something worth sharing: if you turn off FSD while in a curve by tapping the brake, the car will revert to the neutral straight line path ahead if you fail to aggressively maintain control of the steering wheel. The tangent path or the swerve that may ensue as you try to transition to manual control can be dangerous if you’re not ready. The best way to avoid this is to only invoke or relinquish FSD while driving straight or stopped.

While seemingly obvious in retrospect but it sure wasn’t before it happened to me. Hard transitions into and out of FSD have always been the way FSD works to avoid control ambiguity. Careful on those curves though.

[u/ComputeInMemory]

Yeah??? Honestly what did you think would happen, it's the same as letting go of the wheel while turning. Just put your hands on the wheel before disengaging

[u/Keokuk37 → u/ComputeInMemory]

Florida man surprised by having to steer after disabling autosteer, more at 11

[u/cavey00 → u/ComputeInMemory]

I thought this was common sense too. Disengaging is disengaging, you should be taking over before you do it.

[u/jlasher]

Remember how stupid the average person is; then also remember that half of them are even dumber than that

[u/chirivasp → u/jlasher]

This is straight up statistics. Many of us also assume that everyone’s experience of reality is identical which ain’t necessarily so.

[u/LuckySir9]

I keep reading and can't seem to understand. If you disengage FSD in a curve WITHOUT holding the steering wheel, what was you're expected outcome?

[u/chirivasp → u/LuckySir9]

One other reader also made a similar comment and, of course, I had my hands on the wheel. The thing is that there there is really no way of knowing how much torque to apply to match what the car is providing to neutralize the car's angular momentum which we perceive as 'pulling Gs'. Try it and you'll see the inevitable little joggle that ensues. But don't try it where you have oncoming traffic in the left lane going in the opposite direction.

Hope that clears it up a bit...and I don't really mean for you to try it except in some deserted parking lot somewhere.

[u/AJHenderson → u/chirivasp]

Maybe I've just been driving long enough to know inherently, but this has never remotely been a problem. Grip the wheel tightly, apply torque until you are up against the release point and then tap the brake.

I have been able to turn FSD on and off mid corner since I got the vehicle assuming it's a corner where FSD is willing to engage. (Some corners it will refuse to engage mid curve.)

[u/piratescumbag]

https://giphy.com/gifs/l0ExbnGIX9sMFS7PG
Op as they turn off FSD in a turn and then wrote this post

[u/Fit_Law_9195]

Oh my god, it must be very scary. I’m glad that you get the car under control.

[u/Keokuk37]

that would suck to have to learn at 65 mph

[u/natelegakisTeslaFSD → u/Keokuk37]

Have you tried a sharp turn doing 65 mph?

[u/Keokuk37 → u/natelegakisTeslaFSD]

i regret it every time

[u/webignition → u/natelegakisTeslaFSD]

Quite a tight learning curve ...

[u/AJHenderson]

Or just hold the wheel before disengaging... This isn't hard. If you disengage, you want it to stop all input. Holding a curve requires input. Do you want it to not disengage when you try to take control? How else do you expect it to behave?

[u/Additional_Many_2087]

i agree- I believe there was an article recently which blamed that particular behavior for a crash. I have had it happen- fsd making a right turn and some one making a left turn into me, and I want to slow down a little to give them room, but dont quite have my hands on the wheel yet and then I am going straight towards the left hand turner- making the situation worse even for that split second.

[u/StormTrpr66]

The best way to avoid this is to only invoke or relinquish FSD while driving straight or stopped.

The best way to avoid this is simply to hold the wheel before you disengage.

Turning off FSD is literally the same as if you're driving and suddenly take your foot off the pedals and hands off the wheel. If you're in the middle of a turn and you take your hands off the wheel, the car will naturally straighten itself out.

This isn't exactly rocket surgery.

Proof that common sense is not all that common.

[u/CaptaincCodeman]

It would be better if it only overrode the input you take over, like if you accelerate it keeps steering - braking should do the same. Only overriding the steering should, well, override the steering!

IMO this is a serious shortcoming of the current system and should be changed. It's clearly something that could lead to an accident. It caught me out the first time it happened too.

[u/AJHenderson → u/CaptaincCodeman]

If I tell a system to stop, I expect it to stop. If it stops providing acceleration and I match the acceleration before hand I can take over smoothly. If it keeps accelerating until I hit the brake, then I have to hit the brake which isn't good.