Lexus 2003 LS Owner's Manual page 34

KEYS AND DOORS
If the vehicle is subjected to a severe frontal, rear or side
impact with the ignition switch turned to the "ON" position, all
doors will unlock automatically after a few seconds.
CAUTION
Before driving, make sure the doors are closed and
locked, especially when small children are in the
vehicle. Along with the proper use of seat belts, locking
the doors helps prevent the driver and passengers from
being thrown out from the vehicle during an accident.
It also helps prevent the doors from being opened
unintentionally.
20
Locking with power door lock switch
11L048a

1 Lock
2 Unlock
To lock all the doors simultaneously, push the power door
lock switch down on the front side. Pushing down on the
rear side will unlock them.
When you push the power door lock switch on the rear side to
unlock the doors to allow a passenger to get in, the outer foot
lights come on. To turn off the lights, push the power door lock
switch on the front side. (For details, see "Outer foot lights" on
page 125.)
The same switch is also found on the front passenger's side.
However, pushing this switch will neither turn on nor off the
outer foot lights.