Follow these steps on your Toyota navigation dashboard to display the 16-digit hexadecimal serial key.
Insert the car key and turn the ignition to the ACC or ON position to power up the Toyota radio and navigation system console panel.
Locate the physical INFO, DISPLAY, or MENU button on the outer bezel of your radio deck console. Press and hold down this button continuously.
While holding the main button, reach for your steering wheel column controls and switch your car's headlights ON and OFF exactly three times in succession.
Your display screen will flick into a diagnostic system controller state showing a Japanese service menu dashboard. Release the main button.
Click on the button labeled ERC Info or look for the section showing a 16-character sequence composed only of numbers and hex letters (ABCDEF0123456789). Copy this code exactly.