When servicing the throttle body and spark plugs of my Vitz 2007 I asked the guy there re: CVT drain / refill. He told me the correct fluid i.e. Toyota Genuine CVT TC. When I asked about the procedure, he said that its drained completely from below as explained in another good post here on PW, but then said that its re-filled by opening a nut bolt with "TC" written on it on the right side of the transmission. So am wondering.......???
Will try and upload some pics later to clarify what he said