Lexus ES-300 2001 Manual page 35

KEYS AND DOORS
11E031
" 1 Louder
2 Off
When you push any button on the key, the vehicle
sounds one beep when the doors are locked by remote
control, and sounds two beeps when the doors are
unlocked.
You can adjust the beep loudness with the knob under
the instrument panel. Turning the knob clockwise
increases the volume and turning it counterclockwise
until it stops turns the buzzer off.
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