Passive Anti-Theft System (PATS) Transceiver
The PATS transceiver reads any key that is placed in the ignition. When the ignition is turned to the RUN or START position, the BCM activates the PATS transceiver. Once the transceiver is activated, it activates the key in the ignition and receives the key data. Once the transceiver receives the key data, it sends the data to the BCM.