Sending commands to the car to test components like fuel pumps or cooling fans in real-time.
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Once you have downloaded the tool or firmware: Sending commands to the car to test components
if you've already downloaded such a tool auto fh3v77z tool download install
Most tools require you to create an account or register the serial number (which may be where a code like "fh3v77z" originates) via the device's activation screen.