Turning the Automatic Sound Levelizer (ASL) on/off

Turning the “TUNE/SEL” knob clockwise turns on the ASL, and turning the “TUNE/SEL” knob counterclockwise turns off the ASL.

ASL automatically adjusts the volume and tone quality according to the noise level as you drive your vehicle.

    See also:

    Maintenance requirements
    To ensure safe and economical driving, day-to-day care and regular maintenance is essential. It is the owner’s responsibility to perform regular checks. Lexus recommends the following maintenance. ...

    Using the radio
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    Tire section names
    1. Bead 2. Sidewall 3. Shoulder 4. Tread 5. Belt 6. Inner liner 7. Reinforcing rubber 8. Carcass 9. Rim lines 10. Bead wires 11. Chafer ...