How do you program the garage door opener button on the 2009 Acura TSX?

To program the garage door opener button on a 2009 Acura TSX, first ensure the vehicle is parked and the ignition is in the "On" position. Press and hold the desired button on the HomeLink system until the indicator light starts to blink, then release the button. Next, go to your garage door opener, press the "Learn" or "Smart" button, and then return to the vehicle to press and hold the HomeLink button for about two seconds. Repeat this process until the garage door opens or closes, indicating successful programming.