"Auto-Leveling" Headlights

Discussion in 'Prime Main Forum (2017-Current)' started by mr88cet, Apr 23, 2017.

  1. mr88cet

    mr88cet Senior Member

    Joined:
    Sep 9, 2008
    2,121
    1,249
    0
    Location:
    Austin, TX
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    I just saw a new review that described the P.Prime's headlights as "auto-leveling," meaning that as you go over hills, or just high- and low-spots in the road, they keep the beam of the headlights horizontal.

    Is that in the US version, or is it part of the EU AHS feature? How well does it work?

    Lots of little tidbits of info I hadn't heard before, like this Auto-leveling feature, mentioned in passing in this review:


    iPhone ? Pro
     
    #1 mr88cet, Apr 23, 2017
    Last edited: Apr 23, 2017
  2. huskers

    huskers Senior Member

    Joined:
    Aug 21, 2005
    2,497
    2,413
    0
    Location:
    Nebraska
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    I wondered about that as well. Hard to check when driving.
     
  3. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    40,365
    28,921
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Our 3rd gen with LED's has levelling system. Not sure how similar it is, but I surmise ours just deals with loading changes, say a lot of stuff in the hatch.

    It's heady stuff though: are you picturing an Abrams tank, headed over hiil'n dale with its barrel never wavering from horizontal? :)
     
  4. RRxing

    RRxing Senior Member

    Joined:
    Jul 7, 2009
    2,161
    1,445
    0
    Location:
    Long Island, NY
    Vehicle:
    2017 Prius
    Model:
    Three Touring
    I believe it just initially adjusts based on the weight of the load in back. I don't think it constantly adjusts to adapt to road changes. Hey - I could be wrong! I've been wrong before, and don't plan on stopping now... :p
     
    Mendel Leisk likes this.
  5. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    13,834
    7,404
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    That is what I thought too, adjusting for load changes only.

    Because it cannot know the basic overall terrain, in certain conditions a road adjusting system would produce wickedly bad results. When the terrain has a true slope, the headlights simply are not supposed to be horizontal. That would produce a too-short pattern on the uphill, and blind oncoming drivers on the downhill.
     
    #5 fuzzy1, Apr 23, 2017
    Last edited: Apr 23, 2017
  6. Samprocat

    Samprocat Active Member

    Joined:
    Jan 16, 2017
    491
    293
    0
    Location:
    Lincoln, NE
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    That is for EU version...
    In NA we get only automatic High Beam

    Posted via the PriusChat mobile app.
     
  7. Samprocat

    Samprocat Active Member

    Joined:
    Jan 16, 2017
    491
    293
    0
    Location:
    Lincoln, NE
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    My BMW have ability to adjust for weight and it will adjust also to angle of front wheels

    Posted via the PriusChat mobile app.
     
  8. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    40,365
    28,921
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I like that Abram Tank analogy though, a lot. :)
     
  9. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    15,273
    6,999
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    The gen2 had auto leveling for loads with the HIDs. I think other markets had a manual dial for it.

    Are you sure this isn't also just for loads? Wouldn't it try to point the lights down while going up a long hill otherwise, or try to light up the sky while going down?
     
  10. William Redoubt

    William Redoubt Senior Member

    Joined:
    Feb 13, 2016
    1,206
    1,144
    1
    Location:
    Coronado Island, California
    Vehicle:
    2016 Prius
    Model:
    Two
    The Gen 4 does not have auto adjusting headlights. I installed Firestone airbags to adjust the rear ride height based on load.
     
  11. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    41,264
    12,793
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    auto-levelling is standard on US vehicles. It has a load sensor in the rear suspension to determine if you're carrying something heavy (full load of passengers or heavy cargo).
     
    jrodz09 likes this.
  12. Krzysiek_KTA

    Krzysiek_KTA Active Member

    Joined:
    Mar 28, 2017
    151
    119
    0
    Location:
    Houston
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    Mine obviously failed and I was trying to find the exact location of that sensor. Checked both rear wheel wells and could not find it.
    Any Guidance whereabouts in rear suspension that sensor is would be appreciated.
    Kris
     
  13. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    41,264
    12,793
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    This is the best I can find. It's number 7.

    upload_2018-2-9_14-42-55.png
     
    albus likes this.
  14. Krzysiek_KTA

    Krzysiek_KTA Active Member

    Joined:
    Mar 28, 2017
    151
    119
    0
    Location:
    Houston
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    It tells me it is more hidden than I suspected. I created separate post so someone else had found it and can share how it looks like. Many Thanks


    Kris
     
  15. JamesBurke

    JamesBurke Senior Member

    Joined:
    May 19, 2009
    1,217
    488
    27
    Location:
    Morgantown, WV
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Try the left rear. Look for the wiring either inside trailing arm forward of wheel or on top of upper control arm to the inside of the shock. Maybe shows in one of these pictures. How To: Install coilovers on a Prius Prime | PriusChat
    $200 part! One of the coilover lowering kits I looked at had an extension bracket for this part.
     
  16. Mark57

    Mark57 Senior Member

    Joined:
    Aug 14, 2009
    2,814
    2,494
    0
    Location:
    Oklahoma City, OK
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    It seems like this would be easy to test. In the dark, turn on the head lights aimed at a wall or garage door at a distance so you can easily see the top of the beam horizontal line. Mark it with blue painters tape. Get one or two people to sit or push down on the rear cargo area and see if the head lights adjust downward.
     
    Tideland Prius likes this.
  17. Lucifer

    Lucifer Senior Member

    Joined:
    Aug 23, 2015
    1,011
    481
    0
    Location:
    Nh
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Advanced
    I remember the the spring on the gen2auto leveler, and how it rusts, my prime advanced quickly adjusts the headlights when I top hills, nano second control.
     
  18. Solar Powered Prime

    Solar Powered Prime Junior Member

    Joined:
    Aug 20, 2018
    18
    5
    0
    Location:
    Pittsburgh
    Vehicle:
    2018 Prius Prime
    Model:
    Plug-in Advanced
    I am curious about this also. Recently, we were driving on a rural road and the headlights were pointing so low, we had to turn on the high beams, just to be able to see the road ahead. We took it to the dealer and they said there is no such capability on our Prime. Would love to know more.
     
  19. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    13,834
    7,404
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
Loading...