Tire Pressure Monitor (TPM) Module
WARNING: This page is about a different car, the 2014 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The TPM module is a radio receiver that collects the tire pressure data from the TPMS tire pressure sensors. The TPM module passes the tire pressure data to the BCM , where the BCM applies a predetermined pass/fail criteria.
The BCM compares the information of each tire pressure message against a pressure limit. If the BCM determines that the tire pressure has fallen below the minimum pressure, the BCM communicates this to the IPC on the vehicle communication network.