Transceiver Module
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Transceiver module communicates with encoded ignition key. During each starting sequence, transceiver module reads encoded ignition key identification code and sends data to PATS module.