Theory Of Operation
WARNING: This page is about a different car, the 2024 RAM ProMaster EV. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic checks the status of the CAN communication between TCM and its connected CAN nodes. When the TCM CAN network is not in "BUS OFF" status but TCM does not receive acknowledgment flags from the other nodes after its CAN transmissions, a "CAN MUTE" failure is detected.