2014 Peterbilt 337 with Cummins ISL ACM location?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by fairway, Jan 22, 2019.

  1. fairway

    fairway Bobtail Member

    12
    1
    Jun 3, 2010
    Lancaster, PA
    0
    Where would the ACM be located? 2014 Peterbilt 337 with Cummins ISL.
    Got flashing def light and 5mph derate. Changed both filters in the def tank. Replaced the doser unit. Replaced both nox sensors. Truck still in derate with light flashing. Any advice? Thinking may have some wiring issues? Thank you.
     
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  3. tnevin225

    tnevin225 Road Train Member

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    Did you have the ECM reset after the work was done?
     
  4. fairway

    fairway Bobtail Member

    12
    1
    Jun 3, 2010
    Lancaster, PA
    0
    Yes. Now I’m getting a 3712 fault code.
     
  5. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Jun 14, 2009
    romulus,mi
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    If you have tried resetting all active/inactive fault codes with Insite after successfully making the correct repairs and the 3712 code is still active, you are going to have to update to the latest calibration available.
     
  6. fairway

    fairway Bobtail Member

    12
    1
    Jun 3, 2010
    Lancaster, PA
    0
    Thank you. Yes cleared all codes, the 3712 is staying. I’ll try the latest calibration.
     
  7. Goodysnap

    Goodysnap Road Train Member

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    3712 should not be active all by itself and is an scr derate only. I agree to reflash if it truly is the only fault that remains. I have seen this before with 3714 but never 3712. A list of the original faults would be helpful to get us to a root cause.

    ACM location can vary by chassis but is typically located in close proximity to the DEF tank or somewhere inside the frame rails near the trans. A VIN could get us closer.
     
  8. fairway

    fairway Bobtail Member

    12
    1
    Jun 3, 2010
    Lancaster, PA
    0
    Original code was 3216. I replaced the intake Nox sensor. That code is no longer active.

    VIN 2NP2HJ7X7EM240255

    Thank you
     
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