Lexus 2004 LS430 Owner's Manual page 71

The flashing indicator light will stay on when all the doors, trunk
and hood are closed and locked.
3. After 30 seconds, the indicator starts flashing and the
system is set.
After the system is set, when you close the trunk which is
opened with an ignition key or wireless remote control or smart
key system, the system is set again. However, this function
operates only when the door is not unlocked during which the
trunk is opened and closed.
In case of the ignition switch with the key inserted:
1. Turn the ignition key to the "LOCK" position and
remove it.
The engine immobilizer system causes the indicator light to
flash.
2. Close and lock all the doors, trunk and hood using an
ignition key or wireless remote control or smart key
system.
If you lock them with wireless remote control or smart key
system, the turn signals flash once.*
NOTE:
* The turn signals can be set not to flash.
Ask your Lexus dealer for details.
The flashing indicator light will stay on when all the doors, trunk
and hood are closed and locked.
KEYS AND DOORS
3. After 30 seconds, the indicator starts flashing and the
system is set.
After the system is set, when you close the trunk which is
opened with an ignition key or wireless remote control or smart
key system, the system is set again. However, this function
operates only when the door is not unlocked during which the
trunk is opened and closed.
Cancelling the system
When you unlock any door using an ignition key, wireless
remote control or smart key system, the system is
cancelled.
If you unlock any door with the wireless remote control or smart
key system, the turn signals flash twice.*
NOTE:
* The turn signals can be set not to flash.
Ask your Lexus dealer for details.
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