LEXUS LS430 2006 Owners Manual

5
When trouble arises
325
5-1. Essential information
Fuel pump shut off system
NOTICE
■Before starting the engine
Inspect the ground under the vehicle.
If you find that fuel has leaked on to the ground, the fuel system has been damaged
and it is in
need of repair. Do not restart the engine.
The fuel pump shut off system stops suppl ying fuel to the engine to minimize
the risk of fuel leakage when the en gine stalls or an airbag inflates.
■To restart the engine after the system activates
Turn the ignition switch to ACC or LOCK once.
Restart it.
STEP1
STEP2

326
5-1. Essential information
Event data recorder
In a crash or a near car crash event
This device records some or all of the following information.
• Engine speed
• Whether the brake pedal was applied or not
• Vehicle speed
• To what extent the accelerator pedal was depressed
• Position of the transmission selector lever
• Whether the driver and front passenger wore the seat belts or not
• Driver's seat position
• SRS airbag deployment data
• SRS airbag system diagnostic data
Your vehicle has computers that monitor and control certain aspects of your
vehicle. These computers assist in dr iving and maintaining optimal vehicle
performance.

Besides storing data useful for troubles hooting,
there is a system to record
data in a crash or a near car crash event.

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When trouble arises
327
5-1. Essential information
Disclosure of the data
Lexus will not disclose the data recorded in an EDR to a third party
except when:
• An agreement from the vehicle's owner (or the leasing company for a
leased v
ehicle) is obtained
• Officially requested by the police or other authorities
• Used as a defense for Lexus in a law suit
• Ordered by a court of law
However, if necessary Lexus will:
• Use the data for research on Lexus vehicle safety performance
• Disclose the data to a third party for r
esearch purposes without dis-
closing details of the vehicle owner, and only when it is deemed neces -
sary
• Disclose summarized data cleared of v
ehicle identification information
to a non-Lexus organization for research purposes

328
5-2. Steps to take in an emergency
If a warning light turns on...
If the brake system warning light comes on, stop the vehicle immediately.
The following warning indicates a possible problem in the brake system.
Continuing to drive the vehicle may be dangerous. 
Immediately stop the vehicl e in a safe place and contact y
our Lexus
dealer.
* Parking brake engaged warning buzzer:
A buzzer will sound if the vehicle is driv en at a speed of approximately 3 mph (5
km/h) or more.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, but then turns off, this does not necessarily
indicate a malfunction in the system.
Warning lightsWarning light/Details
(U.S.A)
(Canada)
Brake system warning light (Warning buzzer)*
• Low brake fluid
• Malfunction in the brake booster system This light also comes on when the parking brake
is not released. If the light turns off after the
parking brake is fully released the system is
operating normally.

5
When trouble arises
329
5-2. Steps to take in an emergency
If the charging system warning light comes on, stop the vehicle immedi-
ately.
The following warnings indicate the pos
sibility of damage to the vehicle
that may lead to an ac cident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer.
Warning lightsWarning light/Details
Discharge warning light
Indicates a malfunction in the vehicle’s charging
system.

330
5-2. Steps to take in an emergency
If the following warning lights come on, have the vehicle inspected
immediately.
Failing to investigate the cause of the following warnings may lead to a
system operating abnormally and possibly cause an accident. 
Have the vehicle inspected by your Lexus dealer immediately.
Warning lightsWarning light/Details
(U.S.A)
(Canada)
Malfunction indicator lamp
Indicates a malfunction in:
• The electronic en gine contr
ol system;
• The electronic throttle control system; or
• The electronic automatic tr
ansmission con-
trol system.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretension system.
Automatic headlight leveling system and adaptive
front lighting system
Indicates a malfunction in:
• The automatic head light leveling system; or
• The adaptive front lighting system, if the light
flashes.
(U.S.A)
(Canada)
ABS warning light
Indicates a malfunction in:
• The Anti-lock Braking System ABS; or
• The brake assist system.

5
When trouble arises
331
5-2. Steps to take in an emergency
If the following warning lights come on, have the malfunction repaired
immediately.
After taking the specified steps to correct the suspected problem, check
that the warning light turns off.
Warning lightsWarning light/DetailsCorrection
procedures
Open door warning light 
(Warning buzzer)*1
Indicates that a door is not
fully closed.
Check that all doors
are closed.
Low fuel level warning light
Fuel level 
(Less than approximately 3
gal [12L, 2.6 Imp.gal.])Refuel the vehicle.
Driver’s seat belt reminder
light
(Warning buzzer)
Warns the driver to wear
his/her seat belt.
Wear the seat belt.

332
5-2. Steps to take in an emergency
*1Open door warning buzzer:
( P.328)
Front passenger’s seat belt
reminder warning light
Warns the front passenger
to wear their seat belt.Wear the seat belt.
Master warning light
Indicates a malfunction in
any system in the vehicle
A message appears on the
multi-information display
See “If a warning mes -
sage appears...”.
(  P. 3 3 4 )

5
When trouble arises
333
5-2. Steps to take in an emergency
■If the electronic engine control system warning light remains on while driving
First check the following:
• Check fuel level, if the fuel tank is empty, refuel immediately.
• Check the fuel tank cap is loose tighten it securely.
The light will go off after driving regularly for some time.
If the light does not go off even after several trips, contact your Lexus dealer as soon
a
s possible.
■Front passenger detection sensor an d passenger’s seat belt reminder
●If luggage is placed on the front passenger seat, the front passenger detection
sensor may cause the warning light to flash and a chime to sound, even if a pas -
senger is not sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
CAUTION
■If both the ABS and brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The
v

ehicle will become extremely unstable during braking, and the ABS system may
fail, which could cause an accident resulting in death or serious injury.

334
5-2. Steps to take in an emergency
If a warning message appears...
Stop the vehicle immediately.
The following warning indicates the possibility of damage to the vehicle
that may lead to an ac cident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer.
Warning message and lightDetails
Engine oil pressure warning
Indicates abnormal oil pressure.
This warning message may appear it the level of
engine
oil is low. The message should disappear
after checking the oil and adding oil.
If a warning message appears on the multi-information display, check to see
what the problem is and take appropriat e measures referring to the following
table.
Master warning light
Comes on or flashes when a warn -
ing message appears on the multi
information display
. (The warning
light may not come on or flash,
depending on the system. In this
case only the message will be dis -
played.)
Multi information display
1
2