2005 LEXUS LS430 ignition

KEYS AND DOORS
18For your Lexus dealer to make you a new key with built
−in
transponder chip, your dealer will need your key number and
master key. However, there is a limit to the number of
additional keys your Lexus dealer can make for you.
If you make your own duplicate key, you will not be able
to cancel the system or start the engine.
NOTICE
Do not modify, remove or disassemble the engine
immobilizer system. If any unauthorized changes or
modifications are made, proper operation of the system
cannot be guaranteed.
Deactivation using the key
11L223a
 1 Type A 2Type B
The engine immobilizer system is a theft prevention
system. When you insert the key in the ignition switch, the
transponder chip in the key’s head transmits an electronic
code to the vehicle. The engine will start only when the
electronic code in the chip corresponds to the registered
ID code for the vehicle.
The system is automatically set when the key is removed from
the ignition switch. At this time, the security indicator light
flashes. When you insert the key in the ignition switch, the
security indicator light goes out and the system is canceled
automatically, which enables the engine to start.
The transponder chip of the flat key is in its key case. You can
cancel the engine immobilizer system using the flat key. (For
details, see pages 12 and 15.)

11L229c
KEYS AND DOORS
20
SMART KEY SYSTEM (Master keys only)
 1Locking and unlocking 2Unlocking the trunk lid 3Key indicator 4Starting the engine
By carrying a smart key, which is different from a conventional key that is inserted in the key\
holes or ignition switch, you
can lock and unlock the doors, unlock the trunk and start the engine.
For locking the doors, see “Locking the doors with the smart key system”\
on page 25. For unlocking the doors, see “Unlocking t he
door(s) with smart key system” on page 28. For unlocking the trunk lid, see \
“Unlocking the trunk lid with smart key system” on page
31. For starting the engine, see “Smart ignition system with steerin\
g lock” on page 298.
If the smart key battery is discharged, the smart key system cannot be use\
d. Use the mechanical key integrated into the smart key
by inserting it in the door keyhole to lock or unlock doors and into the\
trunk lid keyhole to unlock the trunk lid. To start t he engine,
insert the smart key. In order to activate the smart key system, the battery should be replaced. For details, see “Replacing the battery
(Type A)” on page 42.
You can deactivate the smart key system by using the cancel switch. In th\
is case, all the functions in the smart key system wi ll be
deactivated. For details, see “Deactivating the smart key system” on page 34.\

KEYS AND DOORS
22
11L230a
When a door is opened and closed with the ignition
switch in the “ACC” or “ON” position and with the
selector lever in the “P” position, and then the smart key
is carried outside of the vehicle.
Inside alarm: One chime
Outside alarm: 3 beeps
Multiinformation display: “Key is not Detected”
See page 100 for details.
11L231a
 When you attempted to lock the door(s) with the smart
key still in the vehicle or without turning off the ignition
switch.
Outside alarm: One beep (sounds for 2 seconds)
See page 26 and 27 for details.

KEYS AND DOORS
24Inside warning alarm
Outside warning
alarmMulti−information
warning message displayCausesReference page
ChimesNoneNoneYou opened a door without
turning off the ignition
switch.47
BeepNone“Shift to P Range”You opened a door without
turning off the ignition switch
when the selector lever is in
a position other than “P”.100
BeepBeep“Shift to P Range” and “Key
is not Detected” appear
alternately.You exited and closed a
door without turning off the
ignition switch when the
selector lever is in a position
other than “P”.100
One chimeNone“Low Key Battery”
(shown for about 5 seconds)Smart key battery power is
insufficient.101
One chimeNone“Key is not Detected”
(shown for about 5 seconds)The smart key was not in the
vehicle when you pushed
the ignition switch in the
“LOCK” position.100

KEYS AND DOORS
27
11L234a
Ignition on/off reminder alarm
If you push the lock button on the outside door handle
without turning off the ignition switch, an alarm sounds
for 2 seconds and the doors will not lock.
Before you push the lock button, make sure the ignition switch
is in the “LOCK” position.
11L235b
 Open door warning
If you push the lock button on the outside door handle
while any door is not completely closed, an alarm sounds
for 10 seconds and the doors will not lock.
To stop the alarm, close all the doors securely or push the
“UNLOCK” button on the smart key.
Before you push the lock button, make sure all the doors are
securely closed.

KEYS AND DOORS
28
Unlocking the door(s) with smart key system
11L225
The smart key system can be used to unlock the door(s)
without being inserted into the door keyhole.
When you get close to your vehicle (about 1 m (3 ft.) from each
outside door handle), and are carrying the smart key, the
electronic code emitted from the key is automatically checked
to determine if it corresponds to the registered ID code for the
vehicle. After this, the outer foot lights come on. (For outer foot
lights, see “Outer foot lights” on page 233.) When you take
hold of the back side of the outside door handle on the door
firmly, it will unlock and the key indicator light blinks. (You can
select the doors to be unlocked. For details, see “Changing the
doors to be unlocked” on page 30.) At this time, two beeps sound and the turn signal lights flash
twice. As the door(s) is(are) unlocked, the interior light comes
on for 15 seconds if the interior light switch is in the “DOOR”
position. However, the interior lights go out when you push the
power door lock switch in the lock position or turn the ignition
switch to the “ACC” or “ON” position. For further information,
see “Interior lights” on page 112.
You have 30 seconds to open a door after operating the smart
unlocking
function. If a door is not opened by then, all the doors
will be automatically locked again.

KEYS AND DOORS
30
Adjusting the volume of beeps
11L340b
You can adjust the volume of the beeps which confirm the
locking or unlocking the doors or remind you when the
doors are not completely closed.
Turn the volume adjustment knob counterclockwise to
increase the volume or clockwise to decrease it. The beep
sound is completely deactivated when you turn the knob
clockwise until you hear a click.
INFORMATION
The volume of the smart key system alarm is not
adjustable.
Changing the doors to be unlocked
11L214
 1Unlocking a single door 2Unlocking all the doors
3
Unlocking side doors
When you push the “LOCK” button together with the
“TRUNK” button on the smart key for about 5 seconds
with the ignition switch off, you can change the settings
for door unlocking.
The settings will change from the door on which you take hold
of the outside door handle, to all the doors, to the doors on the
side closest to the smart key, and then back to the door on
which you take hold of the outside door handle.
After setting, a tone sounds and the multi −information display
shows which setting is selected. Outside the vehicle, one beep
sounds when a door is set to be unlocked, 2 beeps sound when
side doors are set, and 3 beeps sound when all the doors are
set.

KEYS AND DOORS
34
Deactivating the smart key system
11L341b
 1Smart key system is on.
2Smart key system is off.
The cancel switch for this system is located at the bottom
of the instrument panel on the driver side. When you push
the button, the smart key system will be deactivated.
Pushing the button again will reactivate the system.
When the smart key system is deactivated, use a mechanical
key or wireless remote control function key to lock and unlock
the doors or unlock the trunk lid. To start the engine, insert a
smart key into the ignition switch.
If you do not intend to drive your vehicle for a long time, push
the cancel switch to deactivate the smart key system.
INFORMATION
The smart key system will be deactivated in the
following cases:
 The key cancel switch is turned on.
 The smart key is inserted into the ignition switch.
 The battery of the smart key is discharged. (In this
case, the indicator on the smart key does not blink
even if you push a button on the key.)