tire pressure Lexus GS450h 2007 Do-it-yourself maintenance / LEXUS 2007 GS450H THROUGH JUNE 2006 PROD. OWNER'S MANUAL (OM30727U)

TABLE OF CONTENTSIndex
iv
3-4. Using the hands-free 
system........................................ 263
Hands-free system ...................... 263
Using the Bluetooth
® 
phone ............................................ 268
Setting the hands-free 
system ............................................. 281
3-5. Using the interior lights .......... 307 Interior lights list............................ 307
3-6. Using the storage features ...... 311 List of storage fe atures.................. 311
3-7. Other interior features............ 317 Sun visors.......................................... 317
Vanity mirror ................................... 318
Clock .................................................. 319
Outside temperature 
display ........................................... 320
Ashtrays ............................................ 321
Cigarette lighter ........................... 322
Power outlet ................................... 323
Seat heaters ................................... 324
Seat heaters and 
ventilators .................................... 326
Armrest ........................................... 328
Rear sunshade ............................... 329
Floor mats......................................... 331
Trunk features................................ 332
Garage door opener .................. 334
Compass.......................................... 339 4-1. Maintenance and care............ 344
Cleaning and protecting the 
vehicle exterior .......................... 344
Cleaning and protecting the 
vehicle interior............................ 346
4-2. Maintenance.............................. 349 Maintenance requirements ..... 349
General maintenance ................. 351
Emission inspection and 
maintenance (I/M) 
programs ...................................... 354
4-3. Do-it-yourself 
maintenance............................ 355
Do-it-yourself service 
precautions ................................. 355
Hood................................................. 358
Positioning the jack .................... 359
Engine compartment................... 361
Tires ................................................... 375
Tire inflation pressure................ 385
Wheels............................................. 389
Air conditioning filter................... 391
Electronic key battery ................ 393
Checking and replacing 
fuses ............................................... 395
Headlight aim.................................... 411
Light bulbs ........................................ 413
4Maintenance and care

vii
Tire
●Rotation
● Replacement
● Inflation pressure
● Information
P. 375
P. 456
P. 487
P. 492
Tail lights P. 120
Side marker light P. 120
Trunk P. 30
Rear window defogger P. 199
Door P. 26
Fuel filler door P. 58
Turn signal light P. 108
: If equipped

157
2-4. Using other driving systems
2
When driving
NOTICE
■When using intuitive parking assist
In the following situations, the system may not function correctly due to a sensor
malfunction etc. Have the vehicle checked by your Lexus dealer.
• A beep does not sound when you turn the main switch ON.
• The intuitive parking assist operation display flashes, and a beep sound when
no obstacle has been detected.
• If the area around a sensor collides with something, or is subjected to strong impact.
• If the bumper collides with something.
• If the display shows continuously without a beep.
■When changing tires
If you install tires of a size other than that recommended by the manufacturer, the
system will be unable to correctly detect steering wheel movement. Always use tire
sizes recommended by the manufacturer.
■When washing the vehicle
When washing the vehicle using high pressure cleaning equipment, do not spray
water directly on the sensors. Subjecting the sensors to high pressure impact may
cause a malfunction.

174
2-5. Driving information
Winter driving tips
Carry out the necessary preparations and inspections before driving the
vehicle in winter. Always drive the vehicle in a manner appropriate to the
prevailing weather conditions.
■ Pre-winter preparations
●Use fluids that ar
e appropriate to the prevailing outside tempera -
tures.
• Engine oil
• Engine/inverter coolant
• Washer fluid
● Ha
ve a service technician inspect th e level and specific gravity of
battery electrolyte.
● Ha
ve the vehicle fitted with four snow tires or purchase a set of
tire chains for the rear tires.
Ensure that all tires are the same si ze and brand, and that chains match
the size of the tires.
● Tire inflation pressure falls in winter as the outside temperature
falls. Add 2.8 to 4.3 psi (20 to 30 kPa, 0.2 to 0.3 kgf/cm2 or bar)
to the standard tire inflation pressure.

177
2-5. Driving information
2
When driving
To retract positionLower the wipers by pressing on
the upper par
t of the hook section.
■Snow chain installation
Observe the following precautions when installing and removing chains.
●Install and remove tire chains in a safe location.
●Install tire chains on the rear tires.
●Install tire chains following the inst ructions provided in the accompanying
instructions.
CAUTION
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents. 
Failing to do so may result in a loss of vehicle control and cause death or serious
injury.
●Use tires of the size specified for your vehicle.
●Maintain the specified level of tire inflation pressure.
●Do not drive in excess of 75 mph (120 km/h), regardless of the type of snow tires
being used.
●Snow tires should be installed on all wheels.

178
2-5. Driving information
CAUTION
■Driving with snow chains
Observe the following precautions to reduce the risk of accidents. 
Failing to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
●Do not drive in excess of the speed limit specified for the tire chains being used,
or 30 mph (50 km/h), whichever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden turns and braking, as use of chains may adversely affect vehicle
handling.
●Slow down sufficiently before entering a curve to ensure that vehicle control is
maintained.
NOTICE
■Repairing or replacing snow tires
Request repairs of and obtain replacement snow tires from Lexus dealers or legiti-
mate tire retailers. 
This is because the removal and attachment of snow tires affects the operation of
the tire pressure warning valves and transmitters.
■Fitting tire chains
The tire pressure warning valves and transmitters may not function correctly when
tire chains are fitted.

Maintenance and care4
343
4-1. Maintenance and care ......... 344Cleaning and protecting the 
vehicle exterior........................ 344
Cleaning and protecting the 
vehicle interior......................... 346
4-2. Maintenance ........................... 349 Maintenance 
requirements ............................ 349
General maintena nce .............. 351
Emission inspection and 
maintenance (I/M) 
programs ................................... 354 4-3. Do-it-yourself

maintenance......................... 355
Do-it-yourself service 
precautions ............................... 355
Hood .............................................. 358
Positioning the jack .................. 359
Engine compartment ................ 361
Tires ................................................. 375
Tire inflation pressure .............. 385
Wheels .......................................... 389
Air conditioning filter ............... 391
Electronic key battery ............. 393
Checking and replacing 
fuses ............................................. 395
Headlight aim ................................ 411
Light bulbs..................................... 413

353
4-2. Maintenance
4
Maintenance and care
Vehicle exterior
ItemsCheck points
Steering wheel
• Moves smoothly?
• Has correct free play?
• No strange noises?
ItemsCheck points
Doors/trunk• Operate smoothly?
Engine hood• The lock system works properly?
Fluid leaks• Is there any leakage after parking?
Ti r e
• Inflation pressure is correct?
• Tire surfaces not worn or dam-aged?
• Tires rotated according to the maintenance schedule?
• Wheel nuts are not loose?
CAUTION
■If the hybrid system is running
Turn off the hybrid system and ensure that there is adequate ventilation before per-
forming maintenance checks.

356
4-3. Do-it-yourself maintenance
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury.
■When working on the engine compartment:
●Keep hands, clothing, and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, inverter, radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily , such as paper or rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.
ItemsPa r t s a n d t o o l s
Engine oil level ( P. 3 6 3 )
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used only for adding engine oil)
Fuses ( P. 3 9 5 )• Fuse with same amperage rating as
original
Headlight aim ( P. 4 1 1 )• Phillips-head screwdriver
Radiator and condenser (P. 3 6 9 )
Tire inflation pressure ( P. 3 8 5 )• Tire pressure gauge
• Compressed air source
Wa s h e r f l u i d ( P. 3 74 )
• Water washer fluid containing anti-
freeze (for winter use)
•Funnel

375
4-3. Do-it-yourself maintenance
4
Maintenance and care
Tires
Replace or rotate tires in accordance with maintenance schedules and
tread wear.
■Checking tires
New tread
Tread wear indicator
Worn tread
The location of tread wear indi-
cators is shown by the “TWI” or
“ ”

marks, etc., molded on the
sidewall of each tire.
Check spare tire condition and
inflati
on pressure if not rotated.
■Tire rotation
Rotate the tires in the order
sho
wn.
Lexus recommends tire rotation
in accordance with the mainte -
nance schedule to equalize tire
w
ear and extend tire life.
Do not fail to initialize the tire
pr
essure warning system after
tire rotation.
■ The tire pressure warning system
Your Lexus is equipped with a tire pr
essure warning system that uses
tire pressure warning valves and transmitters to detect low tire infla -
tion pressure before serious problems arise. ( P. 4 3 3, 438 )
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