Theory Of Operation
WARNING: This page is about a different car, the 2020 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Whenever a Fob-Integrated-Key (FOBIK) is inserted in the Ignition Node Module (IGNM); or the Keyless Ignition Node (KIN) push button is pressed with the key inside the vehicle, the Radio Frequency Hub (RF-Hub) performs a self test and resynchronization routine. During the routine, the RF-Hub interrogates the FOBIK, performing various validity and performance tests. The repair of this fault condition relies on the programmed status of the FOBIK.