The procedure for cleaning the mono-wiper mechanism is in the service manual. Also you'll find a write up on the web. I just did it a few weeks ago.
Take all the plastic bits off that expose the wiper transmission and unbolt it from the motor (instructions say make sure the key is not in the ignition for safety).
Once you've got the naked motor you can try the different wiper speeds to see if the motor does what it is supposed to.
AFAIK, all the motors are the same given LHD or RHD considerations. Though three part numbers appear in the EPC I'm told.
-CTH