2005 LEXUS LS430 lock

KEYS AND DOORS
11
A transponder chip for the engine immobilizer system has
been placed in the master and valet keys. These chips are
required for the
system to function correctly, so be careful not
to lose these keys. If you make your own duplicate key, you
will not be able to cancel the system or start the engine.
To protect items locked in the trunk or glove box when using
valet parking, leave the valet key with the attendant.
Since the doors and the trunk lid can be locked without a key,
you should always carry a spare master key in case you
accidentally lock your keys inside the vehicle.
If you should lose your keys or if you need additional keys,
duplicates can be made by a Lexus dealer using the key
number.
We recommend writing down the key number and storing it in
a safe place.
Flat keys
11L250
 1 Mechanical flat key 2Engine start flat key
A mechanical flat key and an engine start flat key are
included in the key case. Both flat keys are not equipped
with smart key system.
The mechanical flat key works in every lock, but cannot
be used to start the engine.
As a transponder chip is built in the engine start flat key,
you can start the engine only with this key.
A transponder chip for the engine immobilizer system has
been placed in the engine start flat key. This chip is required
for the system to function correctly, so be careful not to lose this
key. If you make your own duplicate key, you will not be able
to cancel the system or start the engine.
Insert your flat key plates in its key case as shown. We
recommend that you always carry this with you for emergency
use. Do not leave it in your vehicle.

KEYS AND DOORS
14
Vehicles not equipped with smart key system
(Type B)
11L025c
1Master keys (black) These keys work for every lock.
For your Lexus dealer to make a new key with a
builtin transponder chip, your dealer will need one
of them.
2 Valet key (gray) This key will not open the trunk,
trunk main switch, the glove box and trunk storage
extension door.
3Key number plate Keep the plate in a safe place
such as your wallet, not in the vehicle.
A transponder chip for the engine immobilizer system has
been placed in the head of the master and valet keys. These
chips are required for the system to function correctly, so be
careful not to lose these keys. If you make your own duplicate
key, you will not be able to cancel the system or start the
engine. To protect items locked in the trunk or glove box when using
valet parking, leave the valet key with the attendant.
Since
the doors and trunk lid can be locked without a key, you
should always carry a spare master key in case you
accidentally lock your keys inside the vehicle.
If you should lose your keys or if you need additional keys,
duplicates can be made by a Lexus dealer using the key
number.
We recommend writing down the key number and storing it in
a safe place.

KEYS AND DOORS
15
Flat key
11g039c
As a transponder chip is built in its key case, you can start
the engine with this key.
The flat key works in every lock.
A transponder chip for the engine immobilizer system has
been placed in the key case of the flat key. This chip is required
for the system to function correctly, so be careful not to lose this
key. If you make your own duplicate key, you will not be able
to cancel the system or start the engine.
Insert your flat key plate in its key case as shown. We
recommend that you always carry this with you for emergency
use. Do not leave it in your vehicle.
Starting the engine using a flat key
11L050a
1. Remove the key plate from the key case.
2. Insert the key plate into the ignition switch. The security
indicator light keeps flashing.
3. Bring the key case closer to the ignition switch within 10
seconds as indicated by the arrow head. The indicator light
goes out. This means the engine immobilizer system is
automatically canceled. (For details, see “Engine immobilizer
system” on page 17.) You can put the key case away then. You
cannot cancel the engine immobilizer system if 10 seconds
have passed after you inserted the key plate. You need to
remove the key plate from the ignition switch and try it again
from the step 2.
4. Start the engine within 20 seconds after the security
indicator light goes out. You cannot start the engine if 20
seconds have passed after the security indicator went off. You
need to remove the key plate from the ignition switch and try
it again from the step 2.

KEYS AND DOORS
17
11L358
Do not bend the key grip or flat key.
 Do not cover the key grip or flat key with any material
that cuts off electromagnetic waves.
 Do not knock the key or flat key hard against other
objects.
 Do not leave the key or flat key exposed to high
temperatures for a long period, such as on the
dashboard or hood under direct sunlight.
 Do not put the key or flat key in water or wash it in an
ultrasonic washer.
 Do not use the key or flat key with electromagnetic
materials.
ENGINE IMMOBILIZER SYSTEM
Deactivation using the smart key system
11L222a
The engine immobilizer system is a theft prevention
system. When you enter the vehicle carrying a smart key
and push the ignition switch, the electronic code in the
key is automatically checked to determine whether it
corresponds to the registered ID code for the vehicle. If
the key indicator light comes on after the ID code
verification, you can start the engine.
This system is automatically set when the ignition switch is
turned to the “LOCK” position. At this time, the security
indicator light flashes. When you push the ignition switch, the
security indicator light goes out and the system is cancelled
automatically, which enables the engine to start.
The engine immobilizer system cannot be cancelled if the
cancel switch of the smart key system is turned on. For details,
see “Deactivating the smart key system” on page 34.

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
21
INFORMATION
Be sure to take the smart key with you.
 In the following cases, the smart key system or
wireless remote control feature may not operate
properly. (If this happens, use a mechanical key to
lock or unlock the doors and trunk lid and a smart key
to start the engine.)
When facilities issuing strong electromagnetic
waves such as TV towers, electric power stations,
broadcasting stations are nearby.
When you are carrying a smart key together with a
mobile communications system such as a
twoway radio or cellular phone.
When the smart key is in contact with or covered
by a metallic object.
When another person is operating a wireless
remote control function on another vehicle near
your vehicle.
 If you do not drive your vehicle, store the smart key,
keeping it at least 5 m (15 ft.) away from the vehicle.
Alarms and warning messages
Your Lexus is equipped with alarms inside and outside, as
well as warning messages in the multiinformation
display, that remind you if there is a problem involving the
smart key system.
Cases which are expected to happen frequently are
shown in the illustrations and the other cases are
described in the table. If an alarm or warning message
comes on, check to see what the problem is referring to
the illustrations and table, and take the appropriate
measure.

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
23
11L232b
When you lock the smart key in the trunk or attempt to
lock a door which is not completely closed.
Outside alarm: One beep (sounds for 10 seconds)
See page 27 and 32 for details.