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When you say that you want to calibrate your Canon printer, what exactly are you trying to accomplish?
If it will not calibrate, sounds like a dirty calibration sensor. This can happen in machines that are older or are used heavily. CLICK HERE for an image showing the sensors.
SR10 and SR11 are the color calibration sensors. If either or both are not completely clean, color calibration will be off to some degree.
These two sensors appear to be located on the transfer belt in the image above. This is not the case. The two sensors look down onto the transfer belt. Clean them with a cotton swab and see if it will calibrate correctly.
Are you familiar and comfortable with opening the printer? If not you may pass it along to a local repair office, or contact Canon.