Because this tool is intended for service technicians, Canon does not host it on consumer support pages. Be highly cautious of unauthorized downloading sites that package malware with the file. Step 1: Download the File
Release both buttons. If the power light stays steady (not blinking), you are in Service Mode. Canon Service Tool 5306 Download
Requires the printer to be in a specific "Service Mode" (manual button combinations) to work, which can be tricky to trigger. Because this tool is intended for service technicians,