Exterior Front Door Handles
WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The exterior front door handles both contain an Intelligent Access (IA) antenna and a capacitive touch lock and unlock sensor. The antennas and lock/unlock sensors are hardwired to the Remote Function Actuator (RFA) module. When a lock or unlock sensor is touched, it signals to the RFA module there is an IA request. When the RFA module receives the request it activates the IA antenna in the corresponding door handle. The low frequency signal from the IA antenna activates an IA key.