Toyota 2006 Sienna Owner's Manual page 281

To turn off the system, push the "OFF"
button.
When the front audio system is turned off,
the rear audio system and the DVD player
will be turned off simultaneously.
266
06 SIENNA_U (L/O 0603)
Vehicles with navigation system—The rear
seat entertainment system can
switched ON and OFF by pushing the
"Rear" switch on the front audio system.
—Front audio system
operation
The rear DVD player can be operated
through the front audio system.
be
2006 SIENNA from March '06 Prod. (OM45443U)