Hi! I can only talk about my personal experience. I've had many breeds since I was 9 years old, (55 now), but this is my first Yorkie. Schnauzers, Afghans, Chihuahuas, Keeshonds, are some. The Keeshond and Schnauzers were trained on command. Never used pad until now, in my times there were newspapers!
My Cayo is 4 months old and it has been now 4 days "without pad", but it takes persistence to help them get to this. He already lets me know he wants to go demanding attention, or barking if I don't notice his signals. At once I put his harness, (won't go outside w/o it), and if I know he is in rush, (early in the morning after we wake up), I carry him outside or he will slip and do it as soon as he is let down.
He does pee on commnad if he doesn't do it on his own. Still working on poo to do it on command, works just sometimes. I's important to recognize the signals while training them and act quickly. They are learning and many are still puppies. As soon as they learn they will take charge and let you know, and you can take them out at least 3 times a day.
Regarding the pads, I remove them during the day and put one at nights just in case. After a couple of weeks with clean pads I remove them completely. You can do as with any child, wake up in the middle of tbe night to ck if they need to go potty those couple of weeks.
You can try taking them together and see if they do their business, or just tend to play. If it is easier for you take them apart.
REMEMBER to give them treats and/or praise them always when they do what is expected of them.
From all the breeds I've had, this little guy has shown me, they are dominant, stubborn sometimes, KINGS, and the most lovable, adorable furball! I'm completely in love and I'm mad with his kisses and the love he gives us. Wish you could see him playing with my eldest's Pittbull! They look sooooo funny running around, and Kyra is so gentle with him! She thinks he is her baby!