Theory Of Operation
WARNING: This page is about a different car, the 2015 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
The Transmission Control Module (TCM) stores in its EEPROM vehicle information data transmitted over the CAN Bus from the BCM. If the stored information in the TCM does not match the information obtained over the CAN Bus, the DTC will set.