Procedure for Communication Between Coil Antenna and Remote Transmitter
WARNING: This page is about a different car, the 2013 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
While the push button start indicator light (green) is flashing, press the top part of the remote transmitter against the center of the push button start.
NOTE:
The coil antenna is integrated with the push button start.