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2011 Volvo vnl780 TCS & ABS losing throttle & power

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Volvo_780, Feb 22, 2021.

Page 2 of 4
  1. Feb 23, 2021 #11
    Snailexpress

    Snailexpress Road Train Member

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    Is it immediately pops up afret truck start rolling or randomly?
     
    Snailexpress, Feb 23, 2021
    Snailexpress, Feb 23, 2021
    #11
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  3. Feb 23, 2021 #12
    Volvo_780

    Volvo_780 Bobtail Member

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    Randomly like today when I picked it up from the shop I drove about 30 miles and it started to act up then when it does act up it hard to drive since you lose throttle
     
    Volvo_780, Feb 23, 2021
    Volvo_780, Feb 23, 2021
    #12
    Snailexpress Thanks this.
  4. Feb 23, 2021 #13
    Snailexpress

    Snailexpress Road Train Member

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    Most likely you have wiring problem like many other Volvo owners.
    I'll start from cleaning all grounding connection as the bad one can cause unpredictable codes.
    Ground cable from battery to starter, ground cable from battery to cab pass thru (they are under air tubes).
    Ground cable from battery to frame. This one has fusible link under shrink tube on the frame side. Need to check with ohmmeter.
    And Bendix diagnostic to check the ABS module itself.
     
    Snailexpress, Feb 23, 2021
    Snailexpress, Feb 23, 2021
    #13
    Volvo_780 Thanks this.
  5. Feb 23, 2021 #14
    Snailexpress

    Snailexpress Road Train Member

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    If you are in Salt Lake City I can help you tomorrow.
     
    Snailexpress, Feb 23, 2021
    Snailexpress, Feb 23, 2021
    #14
  7. Feb 23, 2021 #15
    Volvo_780

    Volvo_780 Bobtail Member

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    Thank you so much I am gonna have the mechanic read your message and check since you know what your talking about
     
    Volvo_780, Feb 23, 2021
    Volvo_780, Feb 23, 2021
    #15
  8. Feb 23, 2021 #16
    Volvo_780

    Volvo_780 Bobtail Member

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    Man I wish I was can I get you a flight ticket to Michigan lol
     
    Volvo_780, Feb 23, 2021
    Volvo_780, Feb 23, 2021
    #16
  9. Feb 23, 2021 #17
    Volvo_780

    Volvo_780 Bobtail Member

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    man any way I can talk to you on the phone to explain cuz your the first person that is making sense
     
    Volvo_780, Feb 23, 2021
    Volvo_780, Feb 23, 2021
    #17
  10. Feb 23, 2021 #18
    Snailexpress

    Snailexpress Road Train Member

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    You need more electronic technician to find Volvo gremlins.
    More information for your mechanic you can find on Bendix web page. They have very good PDF for EC-60 ABS module with code troubleshooting and pinout diagrams.
     
    Snailexpress, Feb 23, 2021
    Snailexpress, Feb 23, 2021
    #18
  11. Feb 23, 2021 #19
    Snailexpress

    Snailexpress Road Train Member

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    I'll PM you.
     
    Snailexpress, Feb 23, 2021
    Snailexpress, Feb 23, 2021
    #19
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