Toyota Sienna 2010 Owner's Manual page 285

Adjusting the Automatic Sound Levelizer (ASL)
■
ASL automatically adjusts the volume and tone quality to compen-
sate for varying noise levels while driving.
Type A and B
When "ASL" is selected, turning
"ASL" level in the order of "LOW", "MID" and "HIGH".
Turning
Type C
When "ASL" is selected, turning
and turning
Setting the rear seat entertainment system lock (vehicles with
■
rear seat entertainment system)
to the left turns "ASL" off.
to the left turns "ASL" off.
3-2. Using the audio system
to the right changes the
to the right turns "ASL" on,
When "RSE" is selected, turn
until "RSE ON" or "RSE
OFF" is displayed.
The rear seat entertainment sys-
tem lock remains on, even when
the engine switch is turned off.
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