2006 LEXUS LS430 warning

5
When trouble arises
339
5-2. Steps to take in an emergency
Warning message and lightDetailsCorrection procedures
Steering lock warning
This message comes
on when you push
the ignition switch or
insert the smart key,
and hold the switch
or key in the "LOCK"
position for more
than 3 seconds.Turn the ignition switch
from "LOCK" to "ACC"
while moving the steer-
ing wheel slightly left to
rig
ht. ( P.94
)
Lexus park assist sys-
tem warning
Foreign matter (ice,
snow, mud, etc.,) has
adhered to the sonar.Remove the foreign mat -
ter or deice the sonar.
(The faulty sonar is indi -
cated on the graphic
information display
.)

340
5-2. Steps to take in an emergency
Warning message and lightDetailsCorrection procedures
Dynamic radar/ laser
cruise control system
warning
and
Foreign matter has
adhered to the sen-
sor.
Clean the sensor and try
setting again.
and
(flashes)
• Measurement is
difficult in adverse
weather conditions.
• Driving pattern selector is in
SNOW modeChange the driving pat -
tern selector to Normal
or Power mode
Dynamic radar
cruise control -
• The wipers are
at HI speed
with the AUTO
position
selected.Stop or switch wipers to
Low or Intermittent posi -
tion.
Dynamic laser cruise
control -
• Wipers are at
HI or LOW
speed with the
AUTO posi -
tion selected.
Stop or switch wipers to
Intermittent position.
• Direct sunlight
from the front.

5
When trouble arises
341
5-2. Steps to take in an emergency
*1:Warning buzzer
A buzzer will sound and the master warnin g
light flashes if the vehicle is driven
at a speed of approximately 3 mph (5 km/h).
Warning message and lightDetailsCorrection procedures
Pre-collision system
warning
• The millimeter
radar sensor or the
grill cover is dirty.Clean the sensor cover
with a soft cloth.
• System turned off
for overheat pro -
tection because
pr
e-collision seat
belts have acti -
vated repeatedly
within a short time.
Wait for a while for the
system to reactivate.
Engine oil mainte -
nance information
(U.S.A. only)
The engine oil should
be replaced soon.
The engine oil needs
to be replaced.Replace the engine oil as
soon as possible.

342
5-2. Steps to take in an emergency
■Resetting the tire pressure warning data
After adjusting the tire inflation pressur
e, be sure to initialize the data. (P. 2 7 9 )
If the message remains on, the system may have malfunctioned. Have the vehicle
inspected b
y your Lexus dealer as soon as possible
■The tire pressure warning system may not function properly in the following con -
ditions
●Tires other than the sp ecified sizes are used, or if tires of different sizes or tread
pattern are mixed, or the degree of tread wear is very different among the
installed tires.
●A compact spare tire, snow tires, or tire chains are used.
●The tire inflation pressure is excessively higher than specified, or tire inflation
pressure suddenly drops due to buresting or other causes.
●Driving on slippery road surfaces such as rough or frozen roads.
●Driving under 19 mph (30 km/h) or above 62 mph (100 km/h), or less than 5
minutes drive.
●Initialization was not performed correctly after replacing or rotating tires or
wheels.
●The outside temperature is below 32 °F (0 °C) or above 104 °F(40 °C).
CAUTION
■When the low tire pressure warning message appears
Avoid abrupt maneuvering and braking. If th
e vehicle’s tires have deteriorated, you
could lose control of the vehicle, resulting in death or serious injury.

5
When trouble arises
343
5-2. Steps to take in an emergency
NOTICE
■While the engine oil level warning is displayed
Continued engine operation with low engine o
il will damage the engine.
■Engine oil maintenance massage
The two warning messages are based on the pr
ojected driving range after engine
oil maintenance massage is reset.
The system does not monitor the purity of the engine oil.

344
5-2. Steps to take in an emergency
Smart access system failure warnings
To prevent incorrect operation, your Lexus is equipped with alarms inside
and outside, as well as warning messa ges in the multi-information display,
to alert you to problems involving the smart access system.
Inside alarmOutside alarmMulti-information displayCausesCorrection
procedures
BuzzerNoneNone
A door is
opened with -
out turning OFF
the ignition
switch.
Close the door
or turn off the
ignition switch
None
Beep
(two sec-
onds)
None
An attempt is
made to lock
the door(s)
while the mas-
ter key is still in
the vehicle or
the ignition
switch is ON.Shift to P range.
None
Beep
(ten sec-
onds)
None
An attempt is
made to lock a
door that is ajar,
or lock the mas-
ter key in the
trunk.
Bring the mas -
ter key to the
vehicle.
BeepNone
A door is
opened with-
out turning off
the ignition
switch and with
the transmission
selector lever in
a position other
than P.Turn the igni-
tion switch to
"L
OCK" posi -
tion or bring the
master k
ey to
the vehicle.

380
6-1. Specifications
■Tread wear
The tread wear grade is a comparative rating based on the wear rate of
the tir

e when tested under controll ed conditions on a specified gov -
ernment test course.
For example, a tire graded 150 would wear one and a half (1 - 1 /2) times as
well on the government course as a tire graded 100. 
The relative performance of tires de pends upon the actual conditions of
their
use, however, and may depart significantly from the norm due to varia -
tions in driving habits, service practices
and differences in road characteris-
tics and climate.
■ Traction AA, A, B, C
The traction grades, from highest to lo
west, are AA, A, B and C, and
they represent the tire’s ability to stop on wet pavement as measured
under controlled condit ions on specified government test surfaces of
asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tir
e is based on braking
(straight ahead) traction tests and does not include cornering (turning) trac-
tion.

381
6-1. Specifications
6
Vehicle specifications
■Temperature A, B, C
The temperature grades are A (the hi ghest), B
, and C, representing
the tire’s resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail -
ure.
The grade C corresponds to a level of performance which all passenger car
tir
es must meet under the Federal Moto r Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum r
equired by law.
Warning: The temperature grades for this tire are established for a tire that
is pr
operly inflated and not overloaded. 
Excessive speed, under inflation, or ex ces
sive loading, either separately or
in combination, can cause heat buildup and possible tire failure.