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ABS PROBLEM!!

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

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  1. Jul 16, 2022 #11
    Perchie15

    Perchie15 Light Load Member

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    I’ll check this out tomorrow once I go back to work. Thanks guys. When u said check fuses is there fuses on the abs ecm? Cuz I checked all other fuses for abs in the fuse panel box but found nothing. That’s blown.
     
    Perchie15, Jul 16, 2022
    Perchie15, Jul 16, 2022
    #11 + Quote Reply
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  3. Jul 17, 2022 #12
    Perchie15

    Perchie15 Light Load Member

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    Well I have it all apart now. The dash that is. All the wires look tight and pulled all of them. Nothing chaffed. From where those wires come from idk, don’t even know what to check besides like u said power and grounds
     
    Perchie15, Jul 17, 2022
    Perchie15, Jul 17, 2022
    #12 + Quote Reply
  4. Jul 17, 2022 #13
    GYPSY65

    GYPSY65 Road Train Member

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    Check the cord at truck and trailer connections

    Might be as simple as cleaning and carefully opening the male side of the plug a bit
    They can break so just a flat screwdriver and spread them some
     
    GYPSY65, Jul 17, 2022
    GYPSY65, Jul 17, 2022
    #13 + Quote Reply
  5. Jul 18, 2022 #14
    Inderjit

    Inderjit Medium Load Member

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    Which ABS system do you have? There should be a label on the ECU.
     
    Inderjit, Jul 18, 2022
    Inderjit, Jul 18, 2022
    #14 + Quote Reply
  7. Jul 18, 2022 #15
    Perchie15

    Perchie15 Light Load Member

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    bendix
     
    Perchie15, Jul 18, 2022
    Perchie15, Jul 18, 2022
    #15 + Quote Reply
  8. Jul 18, 2022 #16
    Goodysnap

    Goodysnap Road Train Member

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    2020 is on the years of change over for datalinks on the 9 pin. If a 19 truck you may need a y adapter to talk. If 2020 VECU truck it will be old school c&d hook up. It may just be that your diagnostic tool is not looking for the ECU on the right datalink.

    Bendix has access to EC 80 service and wiring info online. But it’s generic to the module and not vehicle specific.
     
    Goodysnap, Jul 18, 2022
    Goodysnap, Jul 18, 2022
    #16 + Quote Reply
    Rideandrepair Thanks this.
  9. Jul 18, 2022 #17
    Perchie15

    Perchie15 Light Load Member

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    It may be the tool yes… but when the truck doesn’t do the chuff testing clicking all abs sensors then that must mean a wire somewhere in the way huh?
     
    Perchie15, Jul 18, 2022
    Perchie15, Jul 18, 2022
    #17 + Quote Reply
    Rideandrepair Thanks this.
  10. Jul 18, 2022 #18
    Goodysnap

    Goodysnap Road Train Member

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    Yes normally when the chuff test does not cycle the ECU is not powered up or has an internal issue.
     
    Goodysnap, Jul 18, 2022
    Goodysnap, Jul 18, 2022
    #18 + Quote Reply
    Rideandrepair Thanks this.
  11. Jul 18, 2022 #19
    Perchie15

    Perchie15 Light Load Member

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    I’m trying to get a wiring diagram for the ECU I have power to 2 spots going to the ECU ON THE X1 side. Which the bendix diagram says that is the ground and ABS WL But have no power on any other connections going to the ECU including x2 an x3 That obviously isn’t normal so there some break somewhere? I have ground going to it. Also the ABS WL ground whatever that means
     
    Last edited: Jul 18, 2022
    Perchie15, Jul 18, 2022
    Perchie15, Jul 18, 2022
    #19 + Quote Reply
    Rideandrepair Thanks this.
  12. Jul 18, 2022 #20
    Goodysnap

    Goodysnap Road Train Member

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    Post your last 6 up. I don’t have access to KW harness w/o a harness number.

    @spsauerland can most likely hook you up.
     
    Goodysnap, Jul 18, 2022
    Goodysnap, Jul 18, 2022
    #20 + Quote Reply
    Rideandrepair Thanks this.
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