Toyota Highlander Owners Manual: Key information

Operation of each component

...

The keys

The following keys are provided with the vehicle.  vehicles without a smart key system master keys operating the wireless remote control function Valet key key number plate ...

More about Toyota Highlander:

Erasing the entire homelink® memory (all three programs)
Press and hold the 2 outside buttons for 10 seconds until the homelink® indicator light changes from continuously lit (orange) to rapidly flashing (green). If you sell your vehicle, be sure to erase the programs stored in the homelink® memory. Programs stored in the homelink® memor ...