2006 LEXUS LS430 Owners Manual

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

5
When trouble arises
335
5-2. Steps to take in an emergency
Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident.
Have the vehicle inspected by your Lexus dealer immediately.
Warning message and
lightDetails
(flashes)
Brake wear warning
Indicates that your brake pads have worn down
enough to require replacement.
and
VSC and TRAC warning
Indicates a malfunction in the vehicle stability
control system or the traction control system.
These systems do not work while the warning
message is displayed, however, it is no problem
to continue normal driving.
Tire pressure warning system failure warning
Indicates a malfunction in the tire pressure
w
arning system. The system does not work
while the warning message is displayed, how -
ever, it is no problem to continue normal driving.
(flashes)
Steering lock cable failure warning
Indicates that the interlock cable for the steer -
ing lock is faulty.

336
5-2. Steps to take in an emergency
Warning message and lightDetails
Electronically modulated air suspension warning
Indicates a malfunction in the electronically
modulated air suspension system. The system
is not functioning while the warning message is
displayed. However, you can continue driving
until you reach a Lexus dealer.
Lexus park assist system warning
A sensor is malfunctioning or a cable is broken.
Th
e system is not functioning while the warning
message is displayed. However, you can con -
tinue driving until you reach a Lexus dealer.
• The faulty sonar is indicated on the graphic information display.
and
(flashes)
Dynamic radar/ laser cruise control system
warning
Indicates a malfunction in the dynamic radar/
laser cruise control system or the cruise control
system. Stop your vehicle in a safe place, turn
the ignition switch off and then on again to reset
the system. If settings cannot be made or the
same warning appears again, the system may
have malfunctioned. You may continue driving,
however contact your Lexus dealer.
Pre-collision safety system warning
Indicates a malfunction in the pre-collision
safety
system. The system is not functioning
while the warning message is displayed. How -
ever, you can continue driving until you reach a
Lex
us dealer.