The Service Tool V3400 allow to reset the counter of some Canon printers.
For the error code 006, try this:
- After you avec clicked on "Main", wait a few minutes.
- If the error still here, restarts the Service Tool
- Close the service tool
- Disconnect the USB cable from the printer
- After 10 seconds, plug back the cable to the printer
- On Windows, click next when appears "New device"
- Open the service tool