Toyota 2011 Highlander Owner's Manual page 322

Type B and C
Mode
displayed
BASS
MID
TREB
FADE
BAL
*: The sound quality level is adjusted individually in each audio
mode.
■
Adjusting the Automatic Sound Levelizer (ASL)
Type A
When "ASL" is selected, turning
amount of "ASL" in the order of "LOW", "MID" and "HIGH".
Turning
ASL automatically adjusts the volume and tone quality according to vehi-
cle speed.
Sound qual-
ity mode
Bass*
Mid-range*
(type C only)
Treble*
Front/rear
volume F7 to R7
balance
Left/right
volume L7 to R7
balance
to the left turns "ASL" off.
3-2. Using the audio system
Turn to the
Level
left
-5 to 5
-5 to 5 Low
-5 to 5
Shifts to rear
Shifts to left
to the right changes the
Turn to the
right
High
Shifts to
front
3
Shifts to right
317