Whether you own a single vehicle or run a complete service shop, you can benefit from an automotive scan tool. These tools help diagnose issues and solve a wide range of problems, but they can be complex and intimidating, especially if you’re just getting started.
One of the first steps to understanding and using scan tools is learning the ten modes of operation.
Automotive Scan Tools: The 10 Modes of Operation
The primary thing you should understand about the 10 modes of operation is that not all scan tools come equipped with all 10 modes. Some only use modes 1 through 4, while others (usually more expensive) are equipped to use all ten. The important point here is to never assume that a scan tool works in a specific mode, and always do your research before making a purchase.
Scan tool modes range from simple and straight-forward to elaborate and complex. Mode 1, for example, basically starts the conversation between the scan tool and the vehicle’s computer. Mode 6, on the other hand, is used to extract information from “noncontinuous monitors.”
In general, most scan tools and basic code readers will have modes 1 through 4, which gives the user the ability to read an error code and erase the check engine light. As you work you’re way up the diagnostic ladder, you will find more and more functions, like the extracting information from the oxygen sensors (Mode 5), the ability to send commands to a vehicle’s computer (Mode 8), and electronically displaying a car’s identification number (Mode 9).
The 10 Modes of Operation Make it All Happen
If you’re going to use a scan tool properly, you should first have with a clear picture of the 10 diagnostic modes. This will help you know what functions to look for in a tool, and you’ll have a better understanding of a car’s computer, electronics, and engine systems.