From there, the update record shows:

Because the Canon Service Tool is a highly sought-after utility, the internet is flooded with malicious downloads. Keep the following warnings in mind:

This software is intended for professional service personnel. Resetting the waste ink counter without physically cleaning or replacing the waste ink pads will cause ink to eventually overflow inside the printer, damaging internal components and creating a mess.

Canon Service Tool V6000 (often called “Service Tool” or “V6xxx”) is a Windows utility used for low-level maintenance and diagnostics of many Canon inkjet printers (Pixma/MAXIFY families and similar). It’s distributed in unofficial “keyed” forms online; Canon’s authorized service centers use official diagnostic utilities with licensing and safeguards.

Because of the risk involved, only experienced users or service technicians should perform firmware updates. However, there are specific scenarios where updating the firmware is recommended:

Reads, backs up, and writes data directly to the printer's core logic board.

is specialized, unauthorized service software designed to interact directly with the firmware of Canon PIXMA and MAXIFY inkjet printers. Unlike standard driver utilities, this tool allows users to bypass normal operating procedures to perform deep diagnostics, EEPROM resets, and error code clearing. Key Functions