Theory Of Operation
WARNING: This page is about a different car, the 2012 Jeep Patriot and 2012 Jeep Compass. 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 FCM/TIPM. If the stored information in the TCM does not match the information obtained over the CAN Bus, the DTC will set.