Principles of Operation: Notes
WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle has 3 module communications networks:
- standard corporate protocol (SCP) communications network.
- international standards organization (ISO) 9141 communications network.
- controller area network (CAN).
The diagnostic tool connects to the communications networks through the data link connector (DLC). The DLC allows a diagnostic tool access to diagnose and test the vehicle systems of any module on the communications networks.
All 3 communications networks are connected to the DLC. This makes diagnosis and testing of these systems easier by allowing one diagnostic tool to be able to diagnose and control any module on either communications networks from one common connector. The DLC can be found under the instrument panel between the steering column and the driver door.