ABS PROBLEM!!

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Perchie15, Jul 16, 2022.

  1. Perchie15

    Perchie15 Light Load Member

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    Hello y’all. I have 6ABs codes it’s a Cummins IXS ENGINE 2020 kenworth t800, but u scroll through the settings and it says has 6 faults, but I hooked up our scanner that has haldex, wabco, bendix brake program trials. And it isn’t picking anything up for codes I can’t even scan the trucks ABS! Most important when you turn the key, it doesn’t do the click checking. What’s wrong here I did check all the fuses/relays all are good!!
     
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  3. buddyd157

    buddyd157 Road Train Member

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    maybe those codes are from a past episode, and they were never cleared?
     
  4. Perchie15

    Perchie15 Light Load Member

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    Could be but How would one clear them when they spit show up on the laptop?
     
  5. Goodysnap

    Goodysnap Road Train Member

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    Most often with no Chuff test the ABS module is not awake. If you can’t talk to the module this may be the issue. Start with fuses. Then check powers and grounds to the ABS module.
     
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  6. wichris

    wichris Road Train Member

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    Insite
     
  7. Perchie15

    Perchie15 Light Load Member

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    but when none of the abs does the chuff test it wouldn’t be the module would it? Cuz there is 3 on this truck one for each set of wheels.
     
  8. Goodysnap

    Goodysnap Road Train Member

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    ABS ECU…..

    Not modulators.

    yes there are 6 modulator valves.
     
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  9. Perchie15

    Perchie15 Light Load Member

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    Oh duh. Where
    Ohhhhh yessss duh huh. Something being weird there.
     
  10. Goodysnap

    Goodysnap Road Train Member

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    ABS ECU should be bottom center lower of dash.
     
  11. AModelCat

    AModelCat Road Train Member

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    I'd be following Goodysnap's advice. If you can't "see" a module, usually its not powering up or its somehow been disconnected from the datalink.
     
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