Undefined SPN DM1 warning message box: confusion caused by only last active SPN/FMI shown as faults go inactive

I would like to see the behavior of the DM1 fault message popup change with regards to how it updates when faults go inactive. Currently when there are multiple undefined SPNs active, and they all go inactive, all but the last active fault is left displayed in the warning message. I will provide an example below where an end user might be able to solve the problem by sending a picture to their dealer, but the current way the dialog works might result in a dealer service call. Could we perhaps have a way of still showing these faults on the DM1 warning popup, but indicating that they have gone inactive? Perhaps put an “IN” on the line with the SPN/FMI that is inactive?

EXAMPLE Case:

SPN/FMIs active for:

• DEF quality. (Bubbles have accumulated on the sensor after filling causing a temporary unstable reading.)

• SCR fault caused by elevated NOx. (Since the dosing system has stopped dosing because of the previous fault.)

• 1^st torque derate fault (due to emissions issue being present for a given length of time.)

The machine has been running for some time, but the DEF quality fault is not reassessed until a new key cycle. Once the first torque derate kicks in the operator shuts the machine off and restarts it to see if the faults go away. Given that it hasn’t, he leaves the machine to grab his supervisor who calls over the maintenance team. Since he has left the machine running, the DEF quality fault clears and now only the elevated NOx and 1^st torque derate message are left. By the time the maintenance person gets to the machine, all faults have gone inactive, but only the 1^st torque derate is still shown.

The maintenance person takes a picture of the main screen with the DM1 warning showing only the SPN/FMI combination for the 1^st torque derate and sends it to the dealer’s service team to see if there is any way he can fix this without a call out, as this is a recurring but sporadic issue. He hasn’t found the correlation between one of the DEF pumps on site pumping faster causing aeration of the DEF when refilling the machines.

Because there are many different types of problems that could cause a torque derate, the dealer sends out a tech with the engine diagnostic tools. Had the dealer had the DEF quality SPN/FMI they could have passed along a service bulletin from the engine manufacturer that relates to aeration causing these fault codes, and the end user could have verified this as the cause and implemented countermeasures such as lower flow DEF pumps at their fuel depot.