TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

Hill Control Lies! Rolled back and hit a car :(

Discussion in 'Model X' started by asdfasdf, Sep 20, 2016.

  1. asdfasdf

    asdfasdf Member

    Joined:
    Mar 25, 2016
    Messages:
    62
    Location:
    los angeles, ca
    I was at a red light uphill, double checked that hill control was enabled, took my foot off and fiddled with the music, and then i suddenly rolled back and hit the car behind me! ;( ;( ;( pics attached. Is this something tesla would take responsibility for? Can they diagnose what went wrong?

    Sensor popped out, reflector bent etc. other car had more damage of course. ugh.

    edit: photo
     

    Attached Files:

    • Informative x 3
  2. gavine

    gavine Petrol Head turned EV Enthusiast

    Joined:
    Apr 1, 2014
    Messages:
    1,007
    Location:
    Southern New Jersey
    Any chance you accidentally tapped the brake or accelerator? Either of those will disengage hill-hold-assist.
     
    • Informative x 1
  3. Incredulocious

    Incredulocious '11 LEAF –> '13 RAV4 EV

    Joined:
    Mar 31, 2012
    Messages:
    132
    Location:
    Santa Cruz, CA
    Huh?? Since when is hill hold assist supposed to do anything but hold the brake for a second or two so you can reach the accelerator. I wasn't aware that hill hold assist in any vehicle holds the brake indefinitely.
     
  4. Aljohn

    Aljohn Member

    Joined:
    Oct 17, 2014
    Messages:
    548
    Location:
    Georgia
    Sorry to hear. You can try, but IMHO, you are responsible to control the vehicle. Even though your fault, your insurance would cover.
     
  5. gavine

    gavine Petrol Head turned EV Enthusiast

    Joined:
    Apr 1, 2014
    Messages:
    1,007
    Location:
    Southern New Jersey
    I think you're confusing he pre-autopilot with post. Post-AP cars allow you to engage the hill hold indefinitely.
     
    • Informative x 1
  6. Cyclone

    Cyclone Active Member

    Joined:
    Jan 12, 2015
    Messages:
    4,394
    Location:
    Charlotte, NC
    And they engage every time with a "hard press", not that "maybe it will engage nonsense" like on the classics.
     
    • Like x 1
  7. PacManMX

    PacManMX Member

    Joined:
    Jul 14, 2016
    Messages:
    53
    Location:
    Seattle
    Happened yesterday to me too! Car behind me honked so I braked with an inch to spare! I think I've said the following in a thread before but I'll say again:

    When in drive, there is NEVER a situation when I want the car to move in reverse.

    A few updates back I think they made it so you need to put a bit more pressure on the brake to enable "hold". Could have been my imagination. Desire is for the following:

    If I'm stopped, and creep is set to off, automatically put the car in hold. "Stopped" can be defined as that instant of time before rolling backwards when slowing down moving uphill.

    If that isn't possible due to a safety concern or regulation, then visually and audibly warn me the instant the car rolls in reverse when in "drive".
     
    • Like x 4
  8. asdfasdf

    asdfasdf Member

    Joined:
    Mar 25, 2016
    Messages:
    62
    Location:
    los angeles, ca
    exactly, the car started rolling AFTER hill hold was engaged. this is an X so yeah post-ap.
    did you report this to tesla? SO lucky there wasnt anyone standing between the cars!
     
  9. chillaban

    chillaban Member

    Joined:
    May 5, 2016
    Messages:
    577
    Location:
    San Jose, CA
    I've caught myself accidentally tapping a pedal and disengaging it before…. I fortunately didn't have a near miss, but I ended up deciding to hit Park every time I wanted to do something where I couldn't catch the car rolling (e.g. when fiddling with infotainment or other stuff).

    I was at a car wash trying to punch in my code and while reaching out, hit the accelerator a bit.
     
  10. Oursecondone

    Oursecondone Member

    Joined:
    Apr 21, 2016
    Messages:
    21
    Location:
    san antonio,TX
    mine works fine...used on hills today in fact....
     
  11. PacManMX

    PacManMX Member

    Joined:
    Jul 14, 2016
    Messages:
    53
    Location:
    Seattle
    I can't be 100% certain I engaged it. I'm in the habit of using hold at most all stops though - I put it in hold unconsciously by applying significant extra pressure to the brake when stopped and also look for the hold icon. That said, it is absolutely possible that I didn't press hard enough and/or didn't verify the icon. In fact, I'll assume I was in error. My hope is that Tesla takes one of my suggestions above to reduce the chance of such an error in the future.
     
    • Informative x 1
  12. Cosmacelf

    Cosmacelf Active Member

    Joined:
    Mar 6, 2013
    Messages:
    3,399
    Location:
    San Diego
    Yeah, accidentally brushing the accelerator pedal is easy to do, so relying on hill hold without paying attention is risky. I agree with the other poster, if you are going to be distracted, then just put the car into Park.
     
    • Informative x 1
  13. eddiemoy

    eddiemoy Member

    Joined:
    Jun 15, 2013
    Messages:
    23
    Location:
    United States
    i use it extensively at each and every stop. sometime not even knowing it is on. but i've never had an incident where it disengaged on it's own. are you sure it wasn't user error?
     
    • Like x 2
  14. asdfasdf

    asdfasdf Member

    Joined:
    Mar 25, 2016
    Messages:
    62
    Location:
    los angeles, ca
    not 100% but hopefully tesla can investigate and determine this
     
  15. S4WRXTTCS

    S4WRXTTCS Active Member

    Joined:
    May 3, 2015
    Messages:
    1,177
    Location:
    Snohomish, WA
    I've never been able to bring myself to having hill control engaged with my foot off the brake for any length of time.

    Maybe it's trust issues.

    Sure I use hill control on hills all the time, but that's just for the moment from the brake to the throttle. So I don't slip back.

    I also use hill control on mostly flat surfaces when I don't want a delay between moving my foot from the brake to the throttle. So I have it hovering on the throttle.
     
  16. Todd Burch

    Todd Burch Electron Pilot

    Joined:
    Nov 3, 2009
    Messages:
    4,731
    Location:
    Smithfield, VA
    Tesla can probably look it up in your logs for you. Engaging/disengaging hill hold is certainly an event that's recorded in the log.
     
  17. SSD420

    SSD420 Member

    Joined:
    Mar 29, 2016
    Messages:
    852
    Location:
    ON, Canada
    It holds the brake almost indefinitely. If you're in Hill Hold mode too long it automatically puts you into park.
    (Source: playing Pokemon Go too often)
     
    • Funny x 1
  18. c52k

    c52k Member

    Joined:
    Sep 2, 2016
    Messages:
    13
    Location:
    Bay Area CA
    On my BMW X5 it does. Holds it in place until I either hit the brake or gas. Only had my MX for a week so haven't tried it out yet.
     
  19. Skotty

    Skotty 2014 Model S P85

    Joined:
    Jun 27, 2013
    Messages:
    1,440
    Location:
    Kansas City, MO
    I'm pretty sure hill hold is not meant to be an autonomous driving feature. It's just there to hold the car long enough for you to switch pedals. If you want the brake to hold, hold the brake, or put it in park. I don't think Tesla has ever guaranteed anything more than that.
     
  20. HankLloydRight

    HankLloydRight Fluxing

    Joined:
    Jan 18, 2014
    Messages:
    5,751
    Location:
    Connecticut
    I'm not sure it's legal to put a car "in park" on an active roadway.
     

Share This Page