instrument panel Lexus ES300 1997 Instruments And Controls: Key And Doors

KEYS AND DOORS
10At this time, 2 beeps sound. Together with the activation of
unlocking, the parking, tail, side marker and license plate
lights flash 2 times. If the key is in the ignition switch,
unlocking cannot be done.
You have 30 seconds to open a door after using the wireless
remote unlock feature. If a door is not opened by then, all the
doors will be automatically locked again.
If the ªLOCKº or ªUNLOCKº switch is kept pressed in, the
locking or unlocking operation is not repeated. Release the
button and then push again.

Off Louder
When you push the remote control switch, the vehicle
sounds one beep when the doors are locked by the remote
control, and 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.
Unlocking the trunk lid
When you keep the button pushed for about 1 second,
you can unlock the trunk lid. One beep sounds.
If the key is in the ignition switch, the trunk lid cannot be
unlocked with the transmitter.