: Connect the printer directly to a Windows PC using a high-quality USB cable. The Service Tool will not function over Wi-Fi or network connections.
The tool will only "see" your printer if it is in Service Mode. The standard method for many Pixma models is: Canon Service Tool v.4718 Overview | PDF - Scribd
While holding , press and hold the Power button. Do not release either button.
: While holding Stop, press and hold the Power button.
This is the most common error. It means the software cannot communicate with the printer.