Lexus 2003 LS Owner's Manual page 114

EXTERIOR EQUIPMENT
Trunk lid opener
15L033a

1 Main switch
2 Operative
To open the trunk lid while sitting in the driver's seat, pull
the lever with the main switch not pushed in.
100
1
3 Inoperative
2
To protect things put in the trunk, when you have your vehicle
parked, push in the main switch.
15L045
If you do not want to activate the trunk lid opener
system, push in the main switch.
To activate the system, insert the master key and turn
it counterclockwise.