2009 ISX question

Discussion in 'International Forum' started by EZ Money, Feb 27, 2015.

  1. EZ Money

    EZ Money Road Train Member

    My ProStar had a engine warn light on with the yellow triangle.
    It was low on power so the shop plugged it into Insite and got a code for the DPF.
    They did a forced regen and decided to get on Cummins website and get the latest update for the engine.

    Now the engine light is cleared but the update caused the engine fan to stay on at all times,no cruise or jake working now either.

    This idiot in our shop has no clue what to do next...

    Any ideas??
     
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  3. Heavyd

    Heavyd Road Train Member

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    This happens sometimes when ISX's are re calibrated. The "multiplexing" parameter has been set to disable in error. You will need to go back to that shop and have them re-enable it. This programs the engine to talk properly to cab computer.
     
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  4. EZ Money

    EZ Money Road Train Member

    Thanks Heavyd!....Will see if this guy understands that.
    It is our small company shop.
    Will let ya know if he finds it under parameters....not sure where they found this guy!....lol!
     
  5. tompetty69

    tompetty69 Light Load Member

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    Jan 9, 2015
    TX Panhandle
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    That happened to a 2011 I once owned. Turns out the highly trained techs at Peterbilt had left a pair of vise grips on the air line going to the fan (which was a step in the diagnostic tree) for something else. I would check that first.
     
  6. EZ Money

    EZ Money Road Train Member

    Yes,I checked the connection to the fan....all normal.
    They never raised the hood,just hooked the computer to it.
     
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