PATS Transceiver

The PATS  transceiver reads any key placed in the ignition lock cylinder. When the ignition lock cylinder changes to RUN or START, the BCM  activates the PATS  transceiver. Once the transceiver activates, it activates the key transponder in the ignition lock cylinder and receives the key data. Once the transceiver receives the key data, it sends the data to the BCM.