2006 LEXUS LS430 ignition

54
1-6. Theft deterrent system
Engine immobilizer system
■Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic object.
●If the key is in close proximity to or touching a key to the security system (key
with a built-in transponder chip) of another vehicle.
NOTICE
■To prevent damage to the key
The key may be damaged if it is:
•Bent
• Subjected to a strong impact
• Left in direct sunlight
•Wet
• Left in close proximity to objects emitting magnetic fields
• In close proximity to an object that inter
feres with the electromagnetic wave
that is emitted
Keep all keys in a safe place.
The vehicle’s keys have built-in transponder chips that prevent the engine
from starting, if the key has not been previously registered in the vehicle’s on-
board computer.
The indicator light flashes to indi -
cate that the system is operating,
af

ter the ignition switch has been
turned to the Lock position.
Ty p e A
Ty p e B

55
1
1-6. Theft deterrent system
Before driving
Alarm
Deactivating or stopping the alarm
Do one of the following:
• Unlock a door using a key, r
emote entry or smart access
system.
• Turn the ignition switch ON.
The system will return to standby
mode approximately 30 seconds
after it operates.
The system is designed to trigger the alarm, if forcible entry is detected (horn
sounds and emergency flashers flash).
After exiting the vehicle, shut the
doors, trunk and hood, and lock all
the doors. 
The system will begin operating
automatically af
ter 30 seconds.
The security system indicator light
will begin flashing when the system
is set.

71
1-7. Safety information
1
Before driving
CAUTION
■SRS airbag precautions
●If the vinyl cover is put on the area where the SRS knee airbag will deploy, be sure
to remove it.
●Do not use seat accessories which cover the parts where the SRS side airbags
inflate as this may interfere with inflation of these airbags.
●Do not strike or apply significant levels of force to the area of the SRS airbag
components shown on P. 61. Doing so could cause a SRS airbag to malfunction.
●Do not touch any of the component parts immediately after the SRS airbag has
deployed (inflated) as they become hot.
●If breathing becomes difficult, open a d oor or window to allow fresh air in, or
leave the vehicle if it is safe to do so. Wash off any residue as soon as possible to
prevent skin irritation.
●If the areas where the SRS airbags are stored, such as the steering wheel pad and
front pillar garnish, are damaged or cracked, have them replaced by your Lexus
dealer.
●Do not attach any heavy, sharp or hard
objects such as keys or accessories to the
ignition key. The obje cts may restrict the
SRS knee airbag inflation or be thrust into
the driver's seat area by the force of the
deploying airbag, thus causing a danger.

94
2-1. Driving procedures
Starting the engine
■Ignition switch
LOCK:
Inserting and removing the key
ACC:
The audio system and other
acces

sories can be used when
the engine is stopped.
ON:
When driving the vehicle the
engine an
d all accessories are
on.
START:
For starting the engine.
■ Star
ting the engine
Check that the parking brake is set.
Check that the selector lever is set in P.
If you need to restart the engine while the vehicle is moving, put the
selector lever in N.
Sit in the driver’s seat and firmly depress the brake pedal.
Push and turn (if the smart access s
ystem is engaged) or turn the
ignition switch to STAR T and star
t the engine.
1
2
3
4

95
2-1. Driving procedures
2
When driving
■If the engine does not start
Check whether the other keys will start the engine.
If they work, your key may be broken. Have the key checked at your Lexus dealer.
■Starting the engine using the flat key (Smart access)
■ Steering lock release
When starting the engine, the igni -
tion switch may seem stuck in the
“L
OCK” position. To free it, per -
form the following:
Smart access
Push and hold the ignition
s
witch (do not try to turn the
ignition switch), then rock the
steering wheel until it releases.
Standard
Turn the key while turning the
steering wheel slightly in either
dir

ection.
Remove the flat key from its case.
Insert the flat key into the igni-
tions switch.
Start the engine within 10 sec-
onds after the indicator light goes
off.

96
2-1. Driving procedures
■Starting the engine using the flat key (Standard)Put the key case away when the indicator light goes out. When the light
goes out, this means the engine immobilizer system has turned off.
Start the engine within 10 seconds after the indicator light goes off.
■Leak detection pump
Approximately five hours after the engine is turned off, you may hear sound coming
fr
om underneath the luggage compartment for several minutes. This is normal
operation and does not indicate a malfunction. ( 
For your information)
CAUTION
■When starting the engine
Always start the engine while sitting in the driver’s seat. Do not press the accelera -
tor while starting the engine under any circumstances. 
Doing so may cause an accident resu lting i
n death or serious injury.
Remove the flat key from its case. Insert the
flat key into the ignition switch.
Bring the key case close to the ignition switch
within 10 seconds as indicated by the arrow.

97
2-1. Driving procedures
2
When driving
NOTICE
■To prevent battery discharge
Do not leave the ignition switch in the ON
position if the engine is not running.
■When starting the engine
●Do not crank for more than 30 seconds at a time. This may overheat the starter
and wiring systems.
●Do not race a cold engine.
●If the engine becomes difficult to start or stalls frequently, have the engine
checked immediately.

100
2-1. Driving procedures
■Downshifting restrictions in “S” mode
The selector lever cannot be down-shifted if the following speeds are exceeded. (A
buzz
er will sound twice in this situation.)
■Accelerating rapidly
Fully depress the accelerator pedal. Engine sp
eed will increase and the vehicle will
accelerate rapidly.
■When driving at a set speed using the cruise control system
Engine braking will not operate when driving in the “S” shifting mode, even if the
select
or lever is downshifted to “5” or “4”. ( P.129 )
■SNOW mode automatic deactivation
SNOW mode is automatically deactivated if the ignition switch is turned to ACC or
L

OCK after driving in SNOW mode.
■If the transmission selector le ver cannot be shifted from P.
 P.
3 5 4
■If the “S” mode indicator does not come on when the “S” mode is engaged
There may be a malfunction in the automatic transmission system. 
Have the vehicle inspected by your Lexus dealer immediately. 
(In this situation, the vehicle operates as if
the selector lever is in D.)
DownshiftingMaximum speed
mph (km/h)
D 390 (146)
3 262 (100)
2 136 (59)