Communications Network: Overview
WARNING: This page is about a different car, the 2013 Ford Escape. 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 is used to allow 2 or more electronic modules (nodes) to communicate simultaneously 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. The advantage of using multiplexing is to reduce the weight of the vehicle by reducing the number of redundant components and electrical wiring.
NOTE:
The Infotainment Controller Area Network (I-CAN) goes to the DLC, but the Infotainment Controller Area Network (I-CAN) modules communicate with the scan tool over the Medium Speed Controller Area Network (MS-CAN). The IPC is used as a gateway module for the messages to transfer between the scan tool and the modules on the Infotainment Controller Area Network (I-CAN).
The vehicle has 3 module communication networks which are connected to the Data Link Connector (DLC), and are located under the instrument panel:
- High Speed Controller Area Network (HS-CAN)
- Medium Speed Controller Area Network (MS-CAN)
- Infotainment Controller Area Network (I-CAN)