Principles of Operation: Notes
WARNING: This page is about a different car, the 2006 Lincoln Navigator and 2006 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle has 4 module communications networks:
- the standard corporate protocol (SCP) communications network (Navigator with navigation system only)
- the international standards organization (ISO) 9141 communications network
- the medium speed controller area network (CAN)
- the high speed CAN
The diagnostic tool connects to all 4 networks through the data link connector (DLC). This makes diagnosis and testing of these systems easier by allowing one diagnostic tester to be able to diagnose and control any module on the 4 networks from one connector. The DLC can be found under the instrument panel between the steering column and the audio unit.