Windshield sensors not working

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by Henrique Lucas Chevrand, Oct 4, 2021.

  1. Henrique Lucas Chevrand

    Joined:
    Oct 4, 2021
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    Location:
    Brazil
    Vehicle:
    2017 Prius
    Model:
    N/A
    Hello, good night.
    My name is Henrique, i'm from Brazil, and I recently bought a 2017 Prius. Its not a plugin.
    Here in Brazil there is only one trim level.

    I have a rock hit my windshield recently, and had it replaced. The problem was that since here in Brazil the Prius is no longer being manufactured, we have no storage on spare parts, so we have to import all of them and wait very long.

    The windshield that was put is not original, as the original would take up to two weeks to arrive and I cant wait that long without it.

    Since the replacement, the HUD is blurry, but i have made some research and i had to put the original in so it would be on focus.

    My mais concern is the Rain sensors. My wiper has 4 stages. Manual, automatic, medium and fast. The automatic mode is not sensing the rain, and the mode where it wipes every few seconds also does not work. All i can use is Manual, medium and fast.

    Anyone know how i can diagnose the issue? Is it possible that because the windshield is not oem, those moight not work anymore?

    thanks in advance!
     
  2. thomassster

    thomassster Member

    Joined:
    Nov 2, 2015
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    Location:
    Colorado, US
    Vehicle:
    2019 Prius
    Model:
    XLE AWD-e
    There are aftermarket windshields that have rain windshield sensor, but you need to make sure whoever installed it included it and put it together properly. Here is some basic info regarding the tech.
    Rain Sensor & does my car have one - CPR Auto Glass Repair
    I don’t think all Prius 4th gen have that feature? So you may find windshields without it? Which that is what I would guess with your windshield if it does have it, then the sensors need to be connected to the vehicle.
     
  3. Papa John

    Papa John New Member

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    Nov 5, 2021
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    Location:
    Santa Fe, NM
    Vehicle:
    2016 Prius
    Model:
    Three
    I'm also having a problem with the HUD being blurry following a windshield replacement. This is an aftermarket windshield. I did not have a problem with a prior replacement when I used a Toyota windshield, but the price has escalated to $1400, so aftermarket it is. What did you do to fix your blurriness problem?
     
  4. ChapmanF

    ChapmanF Senior Member

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    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Toyota works the thickness of the windshield right there so the two glass surfaces are not perfectly parallel, and the two reflections of the HUD meet at your eyes and look like one. A windshield made of plain flat glass will give you a double image.
     
  5. AzWxGuy

    AzWxGuy Weather Guy

    Joined:
    May 22, 2011
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    Location:
    Tucson, AZ
    Vehicle:
    2021 Prius
    Model:
    Limited
    I just went through two replacement windshields, both with Toyota badging and designed for the HUD and auto wipers. The auto-sensing wipers didn't work with the first replacement, which I brought to the attention of the installers. But then 11 days later I was needing another windshield replacement. At the shop I mentioned again the problem with the wipers and they did it right the second time. The sensor on the inside of the glass was the same, but the sensed area on the windshield looked different in the second install, and I'll admit I am at a loss to explain how that sensor works or doesn't work. I heard that the area on the windshield where the HUD shines has some sort of optical polarization treatment which makes it work.
     
    #5 AzWxGuy, Nov 5, 2021
    Last edited: Nov 5, 2021
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