Results 1 to 7 of 7

Thread: CAX and CMD, CME

  1. #1
    Junior Member
    Join Date
    Nov 2016
    Posts
    17

    Default CAX and CMD, CME

    I'd like to know ( before testing it ) if CAX file allow to modify data in the OS segment ?

    thanks,
    Marc

  2. #2
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    Potentially yes because of the way the Cummins ECM's are designed........you do understand the risks though right? Cummins ECM's can be bricked just by changing calibrations the wrong way, changing code the wrong way could be just as tragic.
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
    Junior Member
    Join Date
    Nov 2016
    Posts
    17

    Default

    Yes, I do understand

    thanks,
    Marc

  4. #4
    New Member
    Join Date
    Dec 2016
    Posts
    7

    Default

    You can romboot the ecm if it is bricked via bench harness!

  5. #5
    Senior Member
    Join Date
    Jan 2016
    Posts
    118

    Default

    how exactly are you guys creating cax files?

  6. #6
    Lifetime Member MICK's Avatar
    Join Date
    Mar 2005
    Posts
    226

    Default

    It all started a long time ago
    Rev it up, Drop the clutch, See what happens?

  7. #7
    Senior Member KhakiCummins's Avatar
    Join Date
    Sep 2011
    Posts
    176

    Default

    From another thread

    Quote Originally Posted by joecar View Post
    ...

    to make a CAX: you look thru the data portion of the raw binary file to see if you recognize some pattern as a table, you determine the format/units of this table, you test it (edit and view resulting operation), and then include the address/format/units of this table in a CAX file so that when you open the calibration with the tunetool it shows this table; and then do the same thing over again for each different OS since the table locations will be different;

    ...
    Base on this thread, the CAX files is just a simple text file. It's finding the data you need to create it that will be the challenge.
    Duane

    2008 Ram 3500 QuadCab
    Hamilton 110# Springs & HD Pushrods, ARP 2000s, EFILive, SB 3250 DD

Similar Threads

  1. CME ecm error 400000 when using tune tool
    By modpcm in forum Cummins 6.7L
    Replies: 0
    Last Post: October 12th, 2015, 04:20 PM
  2. Trans Press Cmd vs Actual
    By dsltnr in forum Cummins 5.9L
    Replies: 2
    Last Post: July 13th, 2012, 11:07 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •