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Anybody know what this might be?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by speedstickman, Jun 16, 2023.

  1. Jun 16, 2023 #1
    speedstickman

    speedstickman Light Load Member

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    Jul 10, 2012
    0
    I'm getting a fault code SPN 929 on my freightliner Cascadia. I looked it up and it says "Tire Location"

    I found this bracket loose near the tire... does anyone know what this is exactly? Tire pressure sensor maybe?

    thank you
     

    Attached Files:

    speedstickman, Jun 16, 2023
    speedstickman, Jun 16, 2023
    #1
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  3. Jun 16, 2023 #2
    AModelCat

    AModelCat Road Train Member

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    Probably speed sensor harness.
     
    AModelCat, Jun 16, 2023
    AModelCat, Jun 16, 2023
    #2
    Tb0n3 Thanks this.
  4. Jun 16, 2023 #3
    speedstickman

    speedstickman Light Load Member

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    Jul 10, 2012
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    Any idea if it needs to be reattached urgently? Or is it ok if I just secure it with some zipties ?
     
    speedstickman, Jun 16, 2023
    speedstickman, Jun 16, 2023
    #3
  5. Jun 16, 2023 #4
    JB7

    JB7 Medium Load Member

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    ABS wire. Look where the area circled in blue is going to. Trace it to the sensor. Press/push the area around the wire. With the bracket loose and pulling on the wire it may have disturbed the sensor. Sometimes they walk out a bit and set a code. See if it needs pushed back in.
    upload_2023-6-16_11-37-21.png
     
    Last edited: Jun 16, 2023
    JB7, Jun 16, 2023
    JB7, Jun 16, 2023
    #4
    AModelCat, Oxbow and OLDSKOOLERnWV Thank this.
  7. Jun 16, 2023 #5
    speedstickman

    speedstickman Light Load Member

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    Jul 10, 2012
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    That's super useful info, appreciate it!
     
    speedstickman, Jun 16, 2023
    speedstickman, Jun 16, 2023
    #5
    Oxbow and OLDSKOOLERnWV Thank this.
  8. Jun 17, 2023 #6
    Goodysnap

    Goodysnap Road Train Member

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    You can see where the speed sensor mounting bracket broke off of at the brake chamber mounting nut. Inspect the opposing side to see if it is mounted in the same manner.

    Yes you can remove the bracket from the ABS sensor and zip tie for temp, maybe to the top of the brake chamber clamp?
     
    Goodysnap, Jun 17, 2023
    Goodysnap, Jun 17, 2023
    #6
  9. Jun 18, 2023 #7
    Snailexpress

    Snailexpress Road Train Member

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    Rocky
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    $200,000 truck. Shaking my head.
     
    Snailexpress, Jun 18, 2023
    Snailexpress, Jun 18, 2023
    #7
  10. Jun 18, 2023 #8
    bad-luck

    bad-luck Road Train Member

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    Abs sensor
     
    bad-luck, Jun 18, 2023
    bad-luck, Jun 18, 2023
    #8
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