Many Toyota vehicles have factory navigation systems installed. These systems hold personal data such as recent locations, phone books, gas mileage and car maintenance records. When it's time to sell a Toyota with the factory navigation, you should reset it to the factory default. This will erase all personal data and help protect you from identity theft.
Turn the Navigation system "On" and press the "Setup" button located on the right side of the unit.
Select "General" from the top right side on the touchscreen menu.
Press the "Down" button to select "Delete Personal Data."
Select "Delete Personal Data" when prompted, touch "Yes" to confirm. All personal data is erased and the settings are set to factory default on the Toyota navigation system.