How do you find the waste ink collector on a printer/scanner ?

Besides service tool, you can use MPTool software to reset Canon printers MP series. This software support for canon MP150, MP160, MP170, MP180, MP450 and MP460.
Reset waste ink counter
To reset waste ink counter at printers canon pixma MP150, MP160, MP170, MP180, MP450 and MP460 there any 2 choice, that is :

• Start with printer on then run this software
• Click Reset Main (main) to reset waste ink counter and then click Reset Platen button (additional)

Please follow the instructions provided here and do let me know if it doesn't help. I'll let you know another trick.
FixYa's how to clean Ink Waste Tank Full

Good luck

Thanks for using FixYa.

The waste ink pads are under the printer and cover the whole bottom of the case. You need to remove the scanner from the top, the side covers, the main case middle cover, unplug all cables from the logic board, lift the print engine up and out and replace the pads. After that you need the service mode to reset the counter if it runs after re assembly.

Besides service tool, mptool is the popularness software to reset printers canon pixma series like MP150, MP160, MP170, MP180, MP450 and MP460. Excess of software that is the program measure of small and amenity of usage. Ability of the software that is to reset level black and color cartridge at canon pixma mp series. And there also facility to write and read EEPROM in the printer. Other excess this software is detect automatically installing printers in the computer.
Reset Ink Counter.
Reset ink counter that is resetting ink level (ink metrer) cartridge at printer.

• Reset Black – reset level black ink cartridge.
• Reset Color – reset level colour ink cartridge.

Reset waste ink counter
To reset waste ink counter at printers canon pixma MP150, MP160, MP170, MP180, MP450 and MP460 there any 2 choice, that is :

• Reset Main (main).
• Reset Platen (additional).

go to this website download this software after that install it follow by instruction that i give to you do reset....
http://www.mediafire.com/file/yan3ytvdumt/MPTool.zip

there is a waste ink tank that stores excess ink from the printing process.

it is almost full and would need to be cleaned or replaced. and then the printer needs to be reset. Recommend Canon service for that problem, there are instructions for it posted online if you care to look around.

The waste ink absorber covers the whole bottom of the machine, under the printer. It is difficult to change, and you have to get into the diagnostic mode to reset the error. A shop repair...

The absorber is under the print assembly, it is a pad and can't be emptied. It is a shop repair since you have to use Canon diagnostics to reset the count and clear the error.

there no any waste ink collector, this printer have only a pad for waste ink, (you don't need to replace first time indication) only take the printer to service center to reset this indication.

or

for immidiate printing -
just switch off printer from main (power) swtich then push and hold the on key and paper key then switch on from power. (it's work some time in some pixma)

The ink collector should be found underneath where the cartridges normally rests. Put some tissue paper on the ink padand let it absorb the ink. You might have to repeat the procedure a few times to get rid of all the ink.

Check out:
http://www.fixyourownprinter.com/forums/inkjet/50418#1