Been here awhile...
Yeah, that's pretty much how you do it. Each transmitter has to be programmed from the opener's remote, but then you need to tell the opener's head unit that that new transmitter is authorized by putting it into the learn mode while at the same time you push the transmitter's button. Doesn't matter if it is a homelink transmitter in our Genesis or even a new remote from the maker of the opener. I found that after you program the head unit that I had to do a final quick "blip" on the learn mode button to take the unit out of learn. That wasn't listed as a step in the opener's manual. Don't know if that was just my brand's quirky electronics or if all brands have that final step in their programming.I really don't know how this rolling code thing works, however a few weeks ago, my garage opener quit. It was the older "Non" rolling code opener, so when the guy came and installed a new unit with the rolling code, the only thing I saw him do different (compared to the old system) was after we put the code into the car from the hand held units, one at a time, his assistent pushed on some button in the unit in the garage. Had to do it after every button in the car was pushed.
He knew what he was doing, and it works fine. Now I hope I never have problems with it because the opener instructions are put away, and I don't want to dig them out to "read the manual".
My Gen is now 1 year old and Homelink has work flawlessly the entire time. I just moved and am ready to reprogram. Like everyone else, I needed a refresher so HERE is where I came!I wonder if other people have the same problems I have with my Homelink control in the car and the Garage door opener. The Homelink control in my Gen works fine for the first 6 or 7 months then it stopped working on occasions. Sometime the garage door opener response to the control other times it ignored the signal. This also happened on my Audi A6's Homelink control as well.