Tire Pressure Monitor (TPM) Module
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.
The TPM module is a receiving antenna that receives the wireless signals from the Intelligent Access (IA) keys and the TPMS sensors. It communicates the TPMS data to the BCM over the MS-CAN . The Intelligent Access (IA) key data is sent to the RFA module through a dedicated single circuit network.