Passive Start Antennas
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
There are 3 passive start antennas. The passive start antennas are hardwired to the RFA module and when activated by the RFA module they transmit a low frequency signal that activates an Intelligent Access (IA) key.