Communications Network - Overview: Overview

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

Multiplexing is a method of sending 2 or more signals simultaneously over a single circuit. Multiplexing allows 2 or more electronic modules (nodes) to communicate over a twisted wire pair [data (+) and data (-)] network. The information or messages that can be communicated on these wires consists of commands, status or data. Multiplexing reduces the weight of the vehicle by reducing the number of redundant components and electrical wiring.

The vehicle has 2 module communication networks connected to the DLC, located under the instrument panel. The communication networks are:

HS-CAN1
HS-CAN2

The vehicle has other module communication networks for module communication, but these networks do not connect directly to the diagnostic scan tool. The GWM translates the messages on these networks, and transfers the signals to the HS-CAN2 to communicate with the diagnostic scan tool. These communication networks are:

HS-CAN3
MS-CAN
Medium Speed Controller Area Network 2 (MS-CAN2) (Vehicles equipped with trailer package only)