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Need help with spn 792 fmi 7 abs code

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by OlegMel, Apr 9, 2023.

  1. Apr 9, 2023 #1
    OlegMel

    OlegMel Medium Load Member

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    Apr 8, 2023
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    Anybody ever dealt with spn 792 fmi 7 code

    DA Right WSS Wheel End
    Still have this code after repairing broken wire
    what is the cause usually? Thank you,
     
    OlegMel, Apr 9, 2023
    OlegMel, Apr 9, 2023
    #1
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  3. Apr 11, 2023 #2
    MWTechGuy

    MWTechGuy Bobtail Member

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    Nov 8, 2022
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    That fault is WSS signal related. Instead of a clean sine wave the WSS data is "dirty". Super obvious if you use PicoScope or DL8. Most common things are coiled WSS harness, damaged rear wiring harness (Newer FL), replacement harness being WAY too long and dirty/damaged tone ring or wheel-end issues. Also after any repair is made, you have to drive over 5mph for the clean signal to be seen.
     
    MWTechGuy, Apr 11, 2023
    MWTechGuy, Apr 11, 2023
    #2
  4. Apr 11, 2023 #3
    OlegMel

    OlegMel Medium Load Member

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    Apr 8, 2023
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    Thank you, code went away after I drove on the street. Original issue was a short with factory crimp connector in a harness
     
    OlegMel, Apr 11, 2023
    OlegMel, Apr 11, 2023
    #3
    MWTechGuy Thanks this.
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