Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Communications Network - Overview: Overview
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)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.