Erasing HomeLink buttons

To erase the three programmed buttons (individual buttons cannot be erased):
• Press and hold the two outer HomeLink buttons until the indicator light begins to flash-after 20 seconds. Release both buttons. Do not hold for longer that 30 seconds.

HomeLink is now in the train (or learning) mode and can be programmed at any time beginning with Step 1 in the Programming section.
See also:
Create a MyKey
To program MyKey on one of the keys programmed to the vehicle,
insert the key that you want to make a MyKey into the ignition. Turn
the ignition on. Use the message center buttons to do the follow ...
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Owner Checks and Services
Certain basic maintenance checks and inspections should be performed
by the owner or a service technician at the intervals indicated. Service
information and supporting specifications are provided ...
