Toyota 2009 Corolla Owner's Manual page 242

Adjusting the Automatic Sound Levelizer (ASL)
n
Except JBL brand audio system
When "ASL" is selected, turning
"ASL" level in the order of "LOW", "MID" and "HIGH".
Turning
ASL automatically adjusts the volume and tone quality according to vehi-
cle speed.
JBL brand audio system
When "ASL" is selected, turning
and turning
ASL automatically adjusts the volume and tone quality according to vehi-
cle speed.
to the left turns "ASL" off.
to the left turns "ASL" off.
I n f o r ma t i o n P r o v i d e d b y :
3-2. Using the audio system
to the right changes the
to the right turns "ASL" on,
3
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