TPM Module
WARNING: This page is about a different car, the 2016 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The TPM module is a receiving antenna that receives high frequency signals. When a remote start request is initiated from the IKT the TPM module receives the signal and communicates that remote start request message via the MS-CAN to the BCM to initiate a remote start event.