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Autopilot hold mode?

Discussion in 'Model S: Driving Dynamics' started by BrettS, Jun 30, 2017.

  1. BrettS

    BrettS Member

    Joined:
    Mar 28, 2017
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    Location:
    Orlando, FL
    So I just had something kind of unusual happen. I was driving with autopilot engaged on a secondary road (at the speed limit plus 5, of course) when I came up to a red light. The car in front of me slowed down and stopped at the light and autopilot stopped my car right behind it. As I was sitting at the light I noticed that my instrument panel had the word “HOLD” in blue letters directly above the speed. The blue autopilot steering wheel indicator was still lit, so autopilot was engaged.

    About the time I noticed this and thought to myself “I don’t think I’ve ever seen that before” the light turned green and the car in front of me moved forward and my car stayed right where it was. There was traffic behind me, so I wanted to start moving, so I hit the accelerator. The word “HOLD” disappeared and the car started moving. It appeared that autopilot was still engaged, so I let go of the pedal and autopilot continued driving normally.

    I hit several more red lights during this trip with autopilot engaged and never saw the word “HOLD” appear again. At one point I thought maybe that I hit the brake after I had stopped and maybe that put it in “hold” mode, but I tried that at another light and as soon as I hit the brake it disengaged autopilot.

    Has anyone else seen anything like that? This is an AP1 car with 17.24.28.
     
  2. Thomas Allen

    Thomas Allen Member

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    I've had the same experience. It seems to happen when you have stopped too close to the car in front of you.
     
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  3. BrettS

    BrettS Member

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    Location:
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    Hmm, that’s odd. Autopilot stopped the car and I don’t recall it being a particularly hard stop or that I was particularly close to the car in front of me. Weird.
     
  4. MikeBur

    MikeBur ManualPilot

    Joined:
    Dec 8, 2014
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    Seattle, WA
    Hold has been around a while. If memory serves, it occurs in one of two scenarios commonly:
    1) Already using TACC/AP and come to stop behind vehicle and Tesla decides there is another thing that crossed its forward view - seen it happen when stopped for bike lane-splitting, pedestrian crossing in front, etc
    2) When engaging TACC/AP while already stopped behind a vehicle.

    This used to VERY rarely happen (think few times a year), though has happened twice for me on .28 /AP1 already.

    Also, now had TWO AEB, "red car of panic" phantom occurrences.

    I have yet to notice an improvement on .28, only these issues so far
     
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  5. andrewket

    andrewket Well-Known Member

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    5,534
    Hold mode has existed since day one. I'd go cut and paste the manual for you, but I assume you're able to do that.
     
  6. BrettS

    BrettS Member

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    Location:
    Orlando, FL
    You’re right. It is in the manual. Imagine that.

    IMG_0028.jpg
     
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