A 9-pin Deutsch cable with a bent pin or a loose USB connection is the #1 physical cause. Vibration from the engine bay can also wiggle a connection loose.
In Cummins INSITE, Error 50005 a critical software system error indicating that an unexpected error has occurred , forcing the program to close immediately cummins insite error 50005 link
: Low battery voltage (below 18-20V can cause the ECM to shut off) or a blown ECM fuse. A 9-pin Deutsch cable with a bent pin
Sometimes the vehicle harness has a break or corrosion on the J1939 data lines. You can bypass it to confirm. cummins insite error 50005 link