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How Contractors Can Leverage Data From CAN bus to Improve Their Fleet Management


BY ELIZABETH TORREZ, WEST REGION TERRITORY MANAGER, TENNA


“A controller area network (CAN) is a vehicle bus standard designed to enable efficient communication primarily between electronic control units (ECUs).”


If you Google “CAN bus,” that’s the an- swer you’ll get from Wikipedia. All clear? Don’t worry – you’re not the only one. Misinformation and lack of clarity around CAN bus has caused confusion in the construction market, particularly about what data CAN bus can offer and the ways this data can be integrated into an equipment management system. An easy way to think about CAN bus is as the nervous system of a heavy truck or piece of equipment. Just like the hu- man nervous system connects and relays messages between the various parts of the body, CAN bus connects and relays


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CALIFORNIA CONSTRUCTOR SEPTEMBER/OCTOBER 2024


messages between the various electrical systems, or between ECUs, within a heavy truck or piece of equipment, such as the engine, transmission, brakes, body, etc. Tese various ECUs are independent


from each other, but the proper operation of a heavy truck or piece of equipment depends on the ECUs being able to com- municate with each other. If your anti-lock brakes go out and the rest of the machine’s systems are oblivious, you may not get the warnings necessary to make repairs. Like how your body’s nervous system


relays pain or other symptoms to alert you that something is wrong, CAN bus allows


these independent systems to collect data from sensors in order to take actions as needed (e.g., alerting drivers and operators to potential problems engaging traction control systems, engaging four-wheel drive in slippery situations, etc.). Te result is vehicles and industrial machinery that can perform better and can be diagnosed, maintained, and sometimes modified or repaired remotely by software alone. So why is it important for contractors to better understand CAN bus? Because when it comes to heavy equipment and fleet management, this versatile commu- nication protocol offers immense benefits


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