flat tire LEXUS LS430 2006 User Guide

283
4-3. Do-it-yourself maintenance
4
Maintenance and care
Tire inflation pressure
■Tire inflation pressure
The recommended cold tire inflation pressure and tire size is displayed on the
tire and loading information label.
Recommended cold tire inflation pressure
Ti r e s i z eInflation pressure psi (kPa, kgf/cm2 or bar)
P225/55R17 95HFront32 (220, 2.2)
Rear32 (220, 2.2)
245/45R18 96WFront33 (230, 2.3)
Rear33 (230, 2.3)
P245/45R18 96VFront33 (230, 2.3)
Rear33 (230, 2.3)

284
4-3. Do-it-yourself maintenance
For sustained high speeds above 100 mph (160 km/h), in countries where such
speeds are permitted by law, add the below pressure to the front tires and rear
tires, but never exceed the maximum cold tire inflation pressure molded on the
tire sidewall.
• P225/55R17 95H: 3 psi (20 kPa, 0.2 kgf/cm2 or bar)
• 245/45R18 96W: 6 psi (40 kPa, 0.4 kgf/cm2 or bar)
• P245/45R18 96V: 6 psi (40 kPa, 0.4 kgf/cm2 or bar)
■ Inspection and adjustment procedure
Ti r e v a l v e
Tire pressure gauge
Remove the tire valve cap.
Press the tip of the tire pressure gauge to the tire valve.
Read the pressure using the graduations on the gauge.
If the tire inflation pressure is not within r
ecommended levels,
inflate the tire.
If you add too much air, press the center of the valve to lower.
After completing the tire inflation pressure measurement and
adjustment, apply soapy water to the v
alve and check for leakage.
Reinstall the tire valve cap.
1
2

285
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Tire inflation pressure check interval
You should check the tire inflation pressur
e every two weeks, or at least once a
month. 
Do not forget the spare. The inflation pressure for the spare tire should be the same
as
that for the standard tire. ( P.364 )
■Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following:
•Wasting fuel
• Reducing driving comfort and tire life
• Making your vehicle less safe to drive
If a tire needs frequent refilling, have it checked by your Lexus dealer.
■Instructions for checking tire inflation pressure
When checking tire inflation pressure, observing the following;
• Check only when the tires are cold. 
If your vehicle has been parked for at least 3 hours and has not been driven for
mor
e than 1 mile or 1.5 km since, you will get an accurate cold tire inflation pres -
sure reading.
• Always use a tire pressure gauge. 
The appearance of the tire can be misleadi n
g. In addition, tire inflation pressures
that are even just a few pounds off can degrade ride and handling.
• Do not bleed or reduce tire inflation pressure after driving. 
It is normal for the tire inflation pressure to be higher after driving.
• Never exceed the vehicle weight capacity. 
Passengers and luggage weight should be pla
ced so that the vehicle is bal-
anced.

286
4-3. Do-it-yourself maintenance
CAUTION
■When inspecting and adjusting tire pressure
Be sure to reinstall the tire valve caps. 
Without the valve caps, dirt or moisture c
ould get into the valve and cause air leak-
age, which could result in an accident. If the caps ha
ve been lost, have new ones put
on as soon as possible.
■Check tire pressure regularly
The tire pressure warning system will warn you when one or more of your tires are
si
gnificantly under-inflated. However, ther e are combinations which the system will
not detect (both tires on the same side or same axle). Thus it is important to check
the tire pressure of all tires regularly.
■Proper inflation is critical to safe tire performance
Keep your tires properly inflated. Otherwise, the following conditions may occur
and r

esult in an accident causi ng in death or serious injury.
•Excessive wear
• Uneven wear
• Poor handling
• Possibility of blowouts from an overheated tire
• Poor sealing of the tire bead
• Wheel deformation and/or tire separation
• A greater possibility of tire damage from road hazards

5When trouble arises
319
5-1. Essential information............ 320If your vehicle needs to be 
towed .......................................... 320
If you think something is 
wrong.......................................... 324
Fuel pump shut off system ..... 325
Event data recorder................. 326 5-2. Steps to take in an

emergency ........................... 328
If a warning light turns on... ... 328
If a warning message 
appears... ................................... 334
If you have a flat tire .................. 347
If the engine will not star
t....... 353
If the transmission selector 
lever cannot be shifted 
from P ......................................... 354
If you lose your keys................. 355
If the vehicle has a 
discharged battery................ 356
If your vehicle overheats........ 359
If the vehicle becomes 
stuck .............................................. 361

324
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
Look for any of the following symptoms.
• Fluid leaks under the vehicle
Water dripping from the air conditioning after use is normal
• Flat-looking tires or uneven tire wear
• Engine coolant temperature gauge needle continually points higher
than normal
■ A
udible symptoms
Listen for any of the following symptoms.
• Change in exhaust sound
• Excessive tire squeal when cornering
• Strange noises related to suspension system
• Pinging or other noises related to engine
■ P
roblems with operation
Check for any of the following symptoms.
• Engine missing, stumbling or running rough
• Appreciable loss of power
• Vehicle pulls to heavily one side when braking
• Vehicle pulls to heavily one sid e when driving on a le
vel road
• Loss of brake effectiveness, sp ongy feeling, pedal almost touches
floor

338
5-2. Steps to take in an emergency
Warning message and lightDetailsCorrection procedures
(flashes)
Open moon roof warn-
ing
If the driver's door is
opened with the igni-
tion switch turned off
and the moon roof is
opened.
Close the moon roof
when you leave your
vehicle.
Parking brake warning
(Warning buzzer)*1
Indicates that the
parking brake is not
released.Release the parking
brake.
Low tire pressure
warning
Tire inflation pressure
is low.Adjust the tire inflation to
the specified pressure.
Low washer fluid warn -
ing
Washer fluid level is
low.Fill the washer fluid tank.
Air conditioning filter
warning
Indicates that the air
conditioning filter is
clogged enough to
require replacement.Change the air condi-
tioning filter.

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
347
5-2. Steps to take in an emergency
If you have a flat tire
Remove the flat tire and replace it with the spare provided.
■Before jacking the vehicle
●Stop the vehicle on a hard, flat surface.
●Set the parking brake.
●Set the transmission selector lever in P.
●Stop the engine.
●Turn on the emergency flashers.
■ Location of spar
e tire jack and jacking position
Tire jack position Spare tire
Tire jack
Tool box Jack handle

348
5-2. Steps to take in an emergency
Replacing a flat tire
Chock the tires.
Slightly loosen the wheel nuts (one
turn).
Wheel
chocks
Flat tireWheel chock positions
Front tire
Left-
hand
sideBehind the rear
right-hand side
tire
Right-
hand
sideBehind the rear
left-hand side tire
Rear tire
Left-
hand
sideIn front of the
front right-hand
side tire
Right-
hand
sideIn front of the
front left-hand
side tire
Wheel nut 
wrench