Normal Operation
WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The PATS transceiver receives voltage from the smart junction box (SJB) on circuit CBP18 (GY/OG) and is grounded on circuit GD116 (BK/VT). The PATS transceiver and the instrument cluster communicate on circuits VRT23 (VT/GY) and VRT24 (YE/OG). The instrument cluster compares the keycode stored in memory and sends a message over the controller area network (CAN) to the powertrain control module (PCM) to start the vehicle if the key code is correct.