Theory Of Operation
WARNING: This page is about a different car, the 2019 RAM 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of the diagnostic is to check if the service TCM has been programmed by the dealer service technician with production software. The service TCM is received at the dealer service location with the program state bit set as "not programmed" in the TCM's non-volatile memory. This bit will switch to the "programmed" state when the production transmission software is programmed into the TCM. If this service procedure is not performed, a fault code will be set when the TCM is powered.