2013 Toyota Sienna Owners Manual - Page 805

3-4. Using the rear audio system Setting the rear seat entertainment system lock Vehicles with a navigation system Owners of models equipped with a navigation system should refer to the "NAVIGATION SYSTEM OWNER'S MANUAL". Vehicles without a navigation system Front audio system Selecting either the front audio system or DVD player audio for the speakers Selecting "LOCK" or "UNLOCK" for the rear seat entertainment system The rear seat entertainment system lock remains on, even when the engine switch is turned off. DVD player display 506 SIENNA_OM_OM45472U_(U)