Location of Headlight Leveling sensor in Prime?

Discussion in 'Prime Technical Discussion' started by Krzysiek_KTA, Feb 9, 2018.

  1. Krzysiek_KTA

    Krzysiek_KTA Member

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    As Always I try to post only if no other information source is available.
    Here comes the questions:
    Whereabouts is the Headlight leveling sensor located in Prime?
    I Have experienced the beams are at the lovest position and doesn't move up/down when the LED headlights are turned on. I suspect the Leveling sensor failed, so it would be good to know where it is. I assumed it would be somewhere in rear suspension, but after removing both rear wheels I could not find it. Any Help would be much appreciated.


    Kris
     
  2. bisco

    bisco cookie crumbler

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    it used to be back there on other prius, could you see all the way under the car?
     
  3. Krzysiek_KTA

    Krzysiek_KTA Member

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    that is what I thought. I lifted the car removed both rear wheels and... could not find it. LOL

    @tidelandprius provided some hints in below post:
    "Auto-Leveling" Headlights | PriusChat

    But still I can't find it... or I do not know what to look for... :(

    Kris
     
  4. bisco

    bisco cookie crumbler

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    you could look at the service manual for 15 bucks, or check out the old threads for a visual. are you sure it's not under warranty?
     
  5. RRxing

    RRxing #burlivesmatters

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    From the 2010 Prius Repair Manual, it shows it on the right-hand side in the rear. Is it the same for the Prime? - That I don't know...

    Screen Shot 2018-02-09 at 9.16.59 PM.png
     
  6. Elektroingenieur

    Elektroingenieur Senior Member

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    The sales brochure for 2017 (PDF) says all three grades of the Prius Prime sold in the U.S. have “Quad-LED projector headlights with auto level control” (emphasis added), but other Toyota publications don’t agree:
    • The U.S. edition of the Owner’s Manual doesn’t have the paragraph about the “Automatic headlight leveling system” found in the European edition (for the Prius PHV).
    • The U.S. edition of the Repair Manual, available by subscription to techinfo.toyota.com, doesn’t have the Automatic Headlight Beam Level Control System section found in the European edition.
    • The U.S. edition of the New Car Features book, also on techinfo.toyota.com, has a figure similar to the one @Tideland Prius kindly shared in the other thread, but it is missing the callout (#7) for the sensor.
    If you still have the Monroney label for your car, does it mention this feature? Perhaps the headlight simply needs adjustment, for which the Repair Manual does have a step-by-step procedure.
     
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  7. Mendel Leisk

    Mendel Leisk Lapsed Cargo Cultist

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    Maybe that picture is a bit deceptive, due the angle of view: we've got the LED headlight on our 2010 Canadian Touring, and the levelling mechanism is more-or-less centred on the rear axle beam. Of course that beam is no longer, on the 4th gen.
     
  8. Krzysiek_KTA

    Krzysiek_KTA Member

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    Gents, thanks for your replies.
    I did my homework and dismantled both rear wheels and inspected the area. there are purple cables going to both wheels, but nothing attached 'lever-like" to the suspension as for previous gens of Prius.
    It looks like there is independent headlight leveling system for each headlight in Prius Prime Advanced.
    It looks like my left head light sensor failed and at the same time disabled the entire auto leveling without any warning sign in the dashboard.
    I managed to adjust manually the left headlight level to equal the right one and bring the car to dealership at later time at my convenience.
    once the issue is fixed I will post feedback.
    Kris
     
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  9. Mendel Leisk

    Mendel Leisk Lapsed Cargo Cultist

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    Just occurred to me: shouldn't this be warrantied?
     
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  10. Krzysiek_KTA

    Krzysiek_KTA Member

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    It sure should be, but I have recently hit the curb and damaged both left wheels (another story I am preparing to post separately) so dealer might attribute the sensor failure to that therefore I intend to involve dealer at later time.
    Kris
     
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  11. Krzysiek_KTA

    Krzysiek_KTA Member

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    Yes it is under warranty, and as we speak I left the car at dealership and they can't fix it. they say the car is not equipped with headlight auto leveling ( sic!). The problem is that there are no dashboard warning about the system not working.
    Let's see what they will come back with.

    Kris
     
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  12. CraigCSJ

    CraigCSJ Active Member

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    Page 633-634 of the 2017 Prius Prime Owners manual for my USA car has description of manual leveling of headlights. No automatic leveling I can see.
     
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