Controller Area Network (CAN) Module Communications Network - System Operation and Component Description: Overview

WARNING: This page is about a different car, the 2021 Lincoln Nautilus. 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 remote DLC, located under the instrument panel. The communication networks are:

DIAG1
DIAG2

The vehicle has 5 communication networks that do not communicate directly with the diagnostic scan tool. The GWM translates the messages on these 5 networks and transfers the signals to the DIAG1 and DIAG2 circuits at the remote DLC. Messages communicated on the HS-CAN1 are communicated to the DIAG1 connection. All other networks are translated to the DIAG2 connection at the remote DLC. The communication networks are:

HS-CAN1
HS-CAN2
HS-CAN3
HS-CAN4
MS-CAN