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Forcibly going to PARK when I take weight off the driver's seat.

Discussion in 'Model S' started by kjl, Jun 20, 2014.

  1. kjl

    kjl Member

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    I'm curious. When I back out of my garage, I often shift my weight around to get a better look out the sides and back, and maybe 20-25% of the time the car will put itself into PARK automatically and stop the car. But it doesn't seem to do it (thankfully) if I shift my weight around going 75 mph on the freeway, and so far it hasn't even happened if I parallel park or shift my weight around in while stopped at a red light or basically any other time that I've noticed.

    Just wondering if anybody knows under what circumstances the Model S will decide that it needs to stop the car out of safety.
     
  2. dsm363

    dsm363 Roadster + Sig Model S

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    If you adjust your mirrors and use the rear camera you shouldn't need to shift around in your seat. I don't know at what speed it doesn't do this but they made this as a safety feature in case you step out of the car forgetting it is in gear.
     
  3. kota23

    kota23 Member

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    If you keep your seat belt on as well it will prevent this from happening.
     
  4. Al Sherman

    Al Sherman It's about THIS car.

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    Believe it or not, I've done this more times than I care to admit. My car gives me a warning about the time it goes into Park. Do you get the warning when you're just shifting around in your seat?
     
  5. dsm363

    dsm363 Roadster + Sig Model S

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    I believe it makes a sound and shifts into Park. It's been a long time since I've seen this though.
    Wearing the seatbelt is probably the key as mentioned above.
     
  6. kjl

    kjl Member

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    I'm pretty sure the seatbelt is not the key (or maybe my car has a malfunction). I always 100% wear my seatbelt, and I put it on before the car has even woken up from sleep mode, so it's definitely on by the time I'm backing out.

    They are set correctly for all other circumstances. But my garage door is very narrow (probably have 4 or less inches clearance on either side) and the sidewalk is quite close to the garage. So I don't have a view out the side mirrors until I've almost completely exited the garage door (the mirrors need to clear the exit), and the view out the rear camera isn't quite wide enough (it's really wide, but I only get a clear view around low bushes after I've backed up fairly far). Long story short: I'm not going to run anybody over if I don't shift around, but I feel better about not scaring the crap out of people on the sidewalk if I peek out the side rear windows as I slowly back out.


    I actually have not noticed any sound when it goes into park. I could just not have noticed it; not sure.




    Yes, I'm not complaining - I've had it save me at least once - when I was new to the car, the lack of engine idle screwed up my subconscious "I turned off the car already which means I probably already put it i park" logic. I'm just wondering exactly what the internal logic of the car is so that I can be more careful in some circumstances if necessary or less paranoid if it's not necessary. e.g. sometimes I take a sweatshirt off inside the car, but I'm kind of sitting on it, so it requires a little butt lift. I'm a little paranoid about doing it super quick because I don't want the car to slam on the brakes. Logically, I know that it probably won't do this, but without concrete knowledge it's hard to gamble on it not happening at 60 mph.
     
  7. Muzzman1

    Muzzman1 Member

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    +1 It's the seatbelt. Put in on prior to unloading the seat to less then 40lbs, otherwise the car thinks there's no driver and applies the E-brake.
     
  8. invisik

    invisik Member

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    I get this frequently when trying to pull into my garage. I still suck at judging how close left-to-right I am so I either open the door to look or roll the window down and stick my head out. The car will go a few inches and then give the triple-beep and whatever the warning message is (can't drive with the door open or something). Seatbelt is off.

    I think it's a good safety feature, but not helping me pull into my garage :)

    -m
     
  9. kjl

    kjl Member

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    Weird - you're the 3rd person to suggest this. My seatbelt is always, always, always on. I wonder what is going on with my car.
     
  10. tezco

    tezco Sig P85

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    You'd think that if the seatbelt circuit was faulty, you'd be hearing that incessant bell gonging away as you were driving around town.
     
  11. dsm363

    dsm363 Roadster + Sig Model S

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    kjl: that makes sense. Hopefully you figure something out that works for your setup.
     
  12. Todd Burch

    Todd Burch Electron Pilot

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    Is your door open at all?

    I know that backing up with your door open--or even slightly ajar--will put the car in park after a few feet.
     
  13. kjl

    kjl Member

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    Definitely not! All I have to do is put it back in reverse and go on my merry way.


    The (not very important) mystery deepens!
     
  14. birdsaresmarter

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    Yeah, I don't think the seatbelt matters either. First time it happened to me I was in a parking garage moving from one spot to another so I did not bother putting on belt and thought that was a factor. More recently I noticed if I shift enough it happens whether or not I have the belt on.
     
  15. altman

    altman Member

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    I've had this happen to me many times, always with the seatbelt on. Not often enough for me to be systematic about working out why, but it's pretty jarring when it happens. I guess I shift about a bit?
     
  16. Seven7

    Seven7 Member

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    Have you told the service center about this? Sounds like an overzealous safety switch in the seat.
     
  17. dsm363

    dsm363 Roadster + Sig Model S

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    #17 dsm363, Jun 20, 2014
    Last edited: Jun 20, 2014
    That's worth a try. I may not shift in my seat as much I guess but I've only had that happen maybe once or twice in almost two years.
     
  18. mknox

    mknox Well-Known Member

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    Not for me. I get a nag about a door being open, but it doesn't stop me.
     
  19. Brass Guy

    Brass Guy Member

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    I tested this in the driveway a few months ago. It was consistent. Without the seatbelt on, I got the car to a few MPH then lifted off the seat. It engaged Park from forward or reverse. With the seatbelt on it did not. This was a couple of minor SW releases ago, but I do still lift off the seat in reverse often and have not had a problem.

    I also wonder if you have a switch problem. Odd if your car doesn't chime every time you drive though.
     
  20. Todd Burch

    Todd Burch Electron Pilot

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    Which door was open? It may be that it's only if it's NOT the driver's door.
     

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