Hi Cliff,
The CM871 (and CM876) have had this issue fixed with an update we've sent a couple of people for testing. However there is a bigger issue with these that might mean we remove flashing support for the time being.
Essentially the ECM is sending back faulty data at random points, to make matters worse Cummins have the checksums disabled in this ECM so we have no idea if what was read is valid to flash back.
There has been once incident of a CM871 ECM being bricked using tune that was read from the ECM (though recovered using forced bootmode).
We will continue to work on some sort of solution to ensure what is read out is ok.
FWIW there is major bugs in the ECM read code as this was the first ECM to go to the new comms protocol Cummins used, we have many workarounds to try to handle what the ECM does wrong (as does the factory software).
I have now posted this sticky thread.
Cheers,
Ross
Last edited by GMPX; September 30th, 2018 at 12:10 PM.
I no longer monitor the forum, please either post your question or create a support ticket.
Thanks
Last edited by JDS; September 1st, 2019 at 09:24 PM.
Yes, the CM871 had been disabled in previous releases because of the reading issues.
This is the one you need that has it re-enabled. Also, these earlier ones are not supporting for editing, the CM871 etc are only read and flash at the moment.
https://forum.efilive.com/showthread.php?29125-August-2019-Beta-Release
I no longer monitor the forum, please either post your question or create a support ticket.
Yeah the alternate method to reading those earlier ECM's seem to be working ok.
The editing of those earlier ECM's is not a high priority to add unfortunately, people in this market seem happy to stick with CalTerm.
I no longer monitor the forum, please either post your question or create a support ticket.