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2010 prius help troubleshooting abs brake codes

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Hlfxprius, Mar 22, 2021.

  1. Hlfxprius

    Hlfxprius Junior Member

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    2010 prius.

    Drove car in a snow storm the other day. Lots of snow was stuck under the wheel wells. That night after parking when looking out my window I noticed the brake lights were flashing like a strobe light on and off. (Car was off sitting in driveway) eventually it stopped on its own. The next morning when I turned the car on I had abs brake and traction light on dash. I read codes with techstream and had the following codes.
    C0200, C1203, C1336, C1345, C1392

    does it sound like just right front abs sensor gone bad and those other codes just pop up? I tried to clear codes with techstream but they don't clear. Doing YAW calibration with techstream fails and does nothing.
     
    #1 Hlfxprius, Mar 22, 2021
    Last edited: Mar 22, 2021
  2. Hlfxprius

    Hlfxprius Junior Member

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    Sorry above I meant does it sound like right front ABS sensor ?
     
  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    You’ve taken a look; nothing disconnected or damaged looking?
     
  4. Hlfxprius

    Hlfxprius Junior Member

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    That is correct, nothing I can see, I removed wheel, and took a look at connector and where sensor goes through hub.
     
    Mendel Leisk likes this.
  5. Hlfxprius

    Hlfxprius Junior Member

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    I replaced the front right ABS sensor with a Used Sensor, no change, also tried YAW calibration again with techstream. Codes and dash lights still remain. Does anyone have any other ideas?

    Is there anyway to test the abs/speed sensors resistance with a meter on ohms? I get no reading even on my good sensors and I'm using a good working meter and I had a good connection.
     
    #5 Hlfxprius, Mar 30, 2021
    Last edited: Mar 30, 2021
  6. RRxing

    RRxing Senior Member

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    Scroll down for volts/ohms info...
     

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  7. ASRDogman

    ASRDogman Senior Member

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    I take it you did clear the abs code, right?

     
  8. Hlfxprius

    Hlfxprius Junior Member

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    Yes I went into techstream and selected codes and hit erase, but they don't clear, the lights stay on the dash and as soon as I refresh codes in techstream they come right back.

    Also the live data shows no speed from RF speed sensor as well next to FR Speed in open in live data it says "ERROR" and the other 3 wheels show "Normal"
     
    #8 Hlfxprius, Mar 31, 2021
    Last edited: Mar 31, 2021
  9. Hlfxprius

    Hlfxprius Junior Member

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    Thanks so much, this is really helpful. I'm still a bit confused on how to actually test the speed sensor to see if it's good, or if it's the hub that's causing the issue. When I checked the speed sensor for resistance I get no reading, even on the good sensors (on the other side). But I'm not familiar with these types of sensors and how to check them properly. Does anyone know if they are active or passive sensors on this car?
     
  10. Hlfxprius

    Hlfxprius Junior Member

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