International DEF Sensor

The calibration change itself doesn’t have a 100% success rate at this point in dealing with the SCR derates. Think they’re working on it.

 

Ok, couple of things; Like Chuck mentioned, Cummins is updating their list of calibrations all the time, so recheck if the new calibration has been updated with a new revision number. Remember, Cummins has to rewrite literally hundreds of these files. The other thing I would try is to isolate the ECM on the datalink by making sure nothing else is communicating when you program it in addition to making sure you have a battery charger connected to ensure battery voltage is 13 volts or higher to prevent data corruption. I did check, that new calibration is correct for the one you listed. What is the engine serial number?

 

How do I know if the calibration was updated? Also, what do you mean isolate the ECM? As in disconnect the body controller? The ESN is 80114622. Thanks for your fast response!

 

@Heavyd

 

Ideally, you only want the ECM communicating on the datalink. So the other modules need to be powered down for best results. What I do is remove the ignition fuse for the ECM and then jump power to it so only the engine will come on. I disconnect cab power at the firewall to disable the body controller and cluster. At that point, if you check the datalink with a sniffer, only the engine shows up.

To check Cummins calibrations for updates, log into Cummins Quickserve, on the left hand side column find "My Applications" and expand it. In the list is "ECM Calibration Revisions". Click that and then you can enter your calibration and do a search. It will list all the revisions and what their update does. The decimal point after the calibration is the revision number. That HD10688 still shows revision .00.

 

Ok awesome. So is this SCR issue an effect from the DEF header codes?

 

@Heavyd

 

Yes, those are all inducement codes triggered from the original three codes which the new calibration is suppose to prevent.

 

Gotcha! Thanks for the help and quick responses @Heavyd