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Tech question

Discussion in 'Kenworth Forum' started by jccwall, Mar 9, 2013.

  1. Mar 9, 2013 #1
    jccwall

    jccwall Light Load Member

    188
    47
    Apr 15, 2011
    tulsa / stillwater, okla
    0
    Recently had my truck in the shop due to no turbo boost and dpf light flashing. After diagnosis and a barometric pressure senson replacement and subsequent regen cycle performed truck runs good. But now my cruise control, engine exhaust brake, and manual control switch for high speed radiator fan are none operational. suggestions please, Other than taking it back to that dealer. I do have some mechanical experience.
    2010 kw t660
     
    jccwall, Mar 9, 2013
    jccwall, Mar 9, 2013
    #1
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  3. Mar 9, 2013 #2
    Heavyd

    Heavyd Road Train Member

    7,824
    6,273
    Feb 4, 2009
    0
    Ok, sounds like they may have updated the software in the ECM and 1939 multiplexing got turned off by accident. Do you have a Cummins ISX? If so, that is what I think has happened. This is in the programming software of the ECM. Nothing you can do, but anyone with Cummins Insite software can check that out and switch it back.
     
    Heavyd, Mar 9, 2013
    Heavyd, Mar 9, 2013
    #2
  4. Mar 11, 2013 #3
    jccwall

    jccwall Light Load Member

    188
    47
    Apr 15, 2011
    tulsa / stillwater, okla
    0
    Thanks for the info. got it back to our shop and found all parameters had be changed in1939 multiplexing. all dash switches had been isolated from ecm. total shutdown was imminent.
     
    jccwall, Mar 11, 2013
    jccwall, Mar 11, 2013
    #3
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