check engine Lexus GS450h 2007 Hybrid system / LEXUS 2007 GS450H FROM JULY 2006 PROD. OWNER'S MANUAL (OM30A05U)

TABLE OF CONTENTSIndex
iv
3-4. Using the hands-free 
system......................................... 261
Hands-free system ....................... 261
Using the Bluetooth
® 
phone ............................................. 265
Setting the hands-free 
system ............................................ 278
3-5. Using the interior lights ......... 303 Interior lights list........................... 303
3-6. Using the storage 
features ..................................... 306
List of storage fe atures.............. 306
3-7. Other interior features............ 312 Sun visors.......................................... 312
Vanity mirror ................................... 313
Clock .................................................. 314
Outside temperature 
display ............................................. 315
Ashtrays ............................................ 316
Cigarette lighter ............................ 317
Power outlet .................................... 318
Seat heaters ..................................... 319
Seat heaters and 
ventilators ...................................... 321
Armrest ............................................ 323
Rear sunshade ............................... 324
Floor mats........................................ 326
Trunk features................................ 327
Garage door opener .................. 329
Compass........................................... 334
Lexus Link System ...................... 338 4-1. Maintenance and care............ 352
Cleaning and protecting the 
vehicle exterior .......................... 352
Cleaning and protecting the 
vehicle interior............................ 354
4-2. Maintenance.............................. 357 Maintenance requirements ..... 357
General maintena nce ............... 359
Emission inspection and 
maintenance (I/M) 
programs ...................................... 362
4-3. Do-it-yourself 
maintenance............................ 363
Do-it-yourself service 
precautions .................................. 363
Hood.................................................. 366
Positioning the jack ..................... 367
Engine compartm ent.................. 369
Tires .................................................. 383
Tire inflation pressure................. 393
Wheels.............................................. 397
Air conditioning filter.................. 399
Electronic key battery ................. 401
Checking and replacing 
fuses ............................................... 403
Headlight aim.................................. 419
Light bulbs ........................................ 421
4Maintenance and care

98
2-1. Driving procedures
CAUTION
■When starting the vehicle
Always keep your foot on the brake pedal while stopped with the hybrid system
running. This prevents the vehicle from creeping.
■When driving the vehicle
●Do not drive if you are unfamiliar with the location of the brake and accelerator
pedals to avoid depressing the wrong pedal. 
Accidentally depressing the accelerator pedal instead of the brake pedal will
result in sudden acceleration that may lead to an accident that could result in
death or serious injury.
●The driver should pay attention to pedest rians when the vehicle is powered only
by the electric motor (traction motor). Because there is no engine sounds, the
pedestrians may misjudge the vehicle’s movement.
●Do not drive the vehicle over or stop the vehicle near flammable materials.
●Do not let the vehicle roll backwards while the shift lever is in a driving position, or
roll forward while the shift lever is in “R”. 
Doing so may cause the hybrid system not to operate or lead to poor brake and
steering performance, resulting in an accident or damage to the vehicle.
●If the smell of exhaust is noticed inside the vehicle, open the windows and check
that the trunk is closed. 
Large amounts of exhaust in the vehicle can cause driver drowsiness and eventu-
ally, death. Have the cause of the problem inspected immediately.

99
2-1. Driving procedures
2
When driving
CAUTION
■When driving the vehicle
●Do not under any circumstances shift the shift lever to “P”, “R” or “N” while the
vehicle is moving.
Doing so can cause significant damage to the transmission and may result in a
loss of vehicle control.
●Do not shift the shift lever to “N” while the vehicle is moving. 
Doing so may cause the engine brake not to operate properly and lead to an
accident.
●Do not turn the hybrid system off while driving. 
The brake actuator will not operate properly if the hybrid system is off.
●Use engine braking (downshift) to maintain a safe speed when driving down a
steep hill. 
Using the brakes continuously may cause the brakes to overheat and lose effec-
tiveness. ( P. 1 0 8 )
●When stopped on an inclined surface, use the brake pedal and parking brake to
prevent the vehicle from rolling backward or forward and causing an accident.
●Be careful when driving on slippery surfaces, as the vehicle may spin or skid when
downshifting, rapidly accelerating, braking or turning.
●Do not adjust the position of the steering wheel, the seat, or the inside or outside
rear view mirrors while driving. 
Doing so may result in a loss of vehicle control that can cause accidents that may
result in death or serious injury.
●Always check that all passengers' arms, heads or other parts of their bodies are
not outside the vehicle, as this may result in death or serious injury.

103
2-1. Driving procedures
2
When driving
Starting the hybrid system
Modes can be switched by pressing the power switch when carrying the
electronic key on your person. (The hybrid system can be started in any
mode by operating the switch at the same time as depressing the brake
pedal.)
■Changing power switch mode
“OFF” mode*
Emergency flashers can be
used.
“A C C ” m o d e
Some electrical components
such as the audio system can be
used.
“IG-ON” mode
All electrical components can
be used.
*: The power cannot be switched to “OFF” unless the shift lever is in
“P”.
■ Starting the hybrid system
Check that the parking brake is set.
Turn off unnecessary lights and accessories.
Check that the shift lever is set in “P”.
Sit in the driver’s seat and firmly depress the brake pedal.
The power switch indicator turns green.
Press the power switch.
After a few seconds, the
“READY” light will flash and
come on with a beep sound.
The vehicle can move when the
“READY” light is on, even if the
engine is stopped.
STEP1
STEP2
STEP3
STEP4
STEP5

115
2-2. Instrument cluster
2
When driving
NOTICE
■To prevent damage to the engine and its components
The engine may be overheating if the engine coolant temperature gauge is in the
red zone (“H”). In this case, immediately stop the vehicle in a safe place. Check the
engine after it has cooled completely. ( P. 4 8 0 )
■To activate the light sensitivity function properly
Do not affix a sticker or window tint to the rear window glass, or put an object
behind the rear seat.

176
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 are appropria te to the prevailing outside tempera-
tures.
• Engine oil
• Engine/inverter coolant
• Washer fluid
● Have a service technician inspect th e level and specific gravity of
battery electrolyte.
● Have 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.
■ Before driving the vehicle
Perform the following according to the driving conditions.
● Do not try to forcibly open a w indow or move a wiper that is fro-
zen. Pour warm water over the frozen area to melt the ice. Wipe
away the water immediately to prevent it from freezing.
● To ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents in
front of the windshield.
● Remove any ice that has accumul ated on the vehicle chassis.
● Periodically check for and remove any excess ice or snow that
may have accumulated in the wheel well or on the brakes.

Maintenance and care4
351
4-1. Maintenance and care ........ 352Cleaning and protecting the 
vehicle exterior........................ 352
Cleaning and protecting the 
vehicle interior......................... 354 4-2. Maintenance........................... 357
Maintenance requirements............................ 357
General maintena nce ............. 359
Emission inspection and 
maintenance (I/M) 
programs ................................... 362
4-3. Do-it-yourself 
maintenance......................... 363
Do-it-yourself service 
precautions ............................... 363
Hood .............................................. 366
Positioning the jack .................. 367
Engine compartment .............. 369
Tires ................................................. 383
Tire inflation pressure .............. 393
Wheels .......................................... 397
Air conditioning filter .............. 399
Electronic key battery .............. 401
Checking and replacing 
fuses ............................................. 403
Headlight aim .............................. 419
Light bulbs...................................... 421

355
4-1. Maintenance and care
4
Maintenance and care
■Cleaning the inside of the rear window
Do not use glass cleaner to clean the rear window, as this may cause damage to the
rear window defogger heater wires. Use a cloth dampened with lukewarm water to
gently wipe the window clean. Wipe the window in strokes running parallel to the
heater wires.
■Caring for leather areas
Lexus recommends cleaning the interior of the vehicle at least twice a year to main-
tain the quality of the vehicle’s interior.
■Shampooing the carpets
There are several commercial foaming-type cleaners available. Use a sponge or
brush to apply the foam. Rub in overlappin g circles. Do not apply water. The excel-
lent results are obtained by keep ing the carpet as dry as possible.
■Seat belts
Clean with mild soap and lukewarm water using a cloth or sponge. Also check the
belts periodically for excessive wear, fraying or cuts.
CAUTION
■Water in the vehicle
●Be careful not to splash or spill liquid on the floor.
●Do not splash water on the electric comp onents in the engine compartment. This
may cause the malfunction of the electric components.
●Do not get any of the SRS components or wiring in the vehicle interior wet. 
(  P. 6 7 ) 
Electrical malfunction may cause the airbags to deploy or not function properly,
resulting in death or serious injury.

359
4-2. Maintenance
4
Maintenance and care
General maintenance
Engine compartment
Luggage compartment
ItemsCheck points
Brake fluid• At the correct level? (P. 3 7 8 )
Engine/inverter coolant• At the correct level? ( P. 3 76 )
Engine oil• At the correct level? ( P. 3 7 1 )
Exhaust system• No fumes or strange sounds?
Radiator/condenser/hoses• Not blocked with foreign matter? 
( P. 3 7 7 )
Wa s h e r f l u i d• At the correct level? ( P. 3 8 2 )
ItemsCheck points
12 volt battery• Maintenance-free ( P. 3 7 9 )
Listed below are the general maintenance items that should be performed
at the intervals specified in the “Warranty and Services Guide/Owner’s
Manual Supplement”. It is recommend ed that any problem you notice
should be brought to the attention of your Lexus dealer or qualified service
shop for advice.

361
4-2. Maintenance
4
Maintenance and care
Vehicle exterior
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.