Theory Of Operation
WARNING: This page is about a different car, the 2020 Chrysler 300 and 2019 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
RFHM communicates with KIN through two redundant inputs, a hard wired ignition switch position signal and a dedicated Security K Line. An active DTC will set when 3 consecutive debounced hardwired switch states do not match the switch states received over the K line.