Normal Operation
WARNING: This page is about a different car, the 2005 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
The remote transmitters and the SJB use a rolling code to prevent the codes from being "captured" by a code grabber. The system advances the counter in the remote transmitter and in the SJB every time a remote transmitter button is pressed.
All remote transmitters must be present to begin diagnosis of the RKE system.