When Monitored:
WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Whenever a valid FOBIK is inserted in the basestation and turned to the ON position, the WIN/PCM handshake takes place. The WIN validates that the message is sent to and received by the PCM.