Decoding Mazda CAN bus

While working on my projects, I did several attempts to depict Mazda CAN protocol, to find useful information. For example getting the shift position for the “smart “mirror project and the fuel level for the fuel reminder. There are many products available for OBD2 protocol. One good product is TouchScan with Mazda extension, which allows you to access every module in the car for diagnostic purposes. Using this tool, I figured out how to get access to the fuel gauge on the console, instead of using the sensor in the tank. However, while it is a very useful tool, it does not provide access to real time information available on CAN bus as broadcasted messages. Continue reading