heating Lexus GS450h 2010 Using The Audio System / LEXUS 2010 GS450H OWNERS MANUAL (OM30C81U)

35
1-1. Hybrid system
1
Before driving
GS_HV_U (OM30C81U)
February 12, 2010 8:52 am
NOTICE
■Hybrid battery air vent
●Do not put foreign objects over the air vent. The hybrid battery (traction battery)
may overheat and be damaged.
●Clean the air vent regularly to prevent the hybrid battery (traction battery) from
overheating.
●Do not wet the air vent. It may cause a short circuit and damage the hybrid bat-
tery (traction battery).
●Do not load a large amount of water such as an aquarium into the vehicle. If water
spills over the hybrid battery (traction battery), the battery may be damaged.

147
2-1. Driving procedures
2
When driving
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
CAUTION
■When taking a nap in the vehicle
Always turn the hybrid system off. Otherwise, you may accidentally move the shift
lever or depress the accelerator pedal, which could cause an accident or fire due to
hybrid system overheating. Additionally, if the vehicle is parked in a poorly venti-
lated area, exhaust gases may collect and enter the vehicle, leading to death or a
serious health hazard.
■When braking the vehicle
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and may cause one side of
the vehicle to brake differently than the other side. Also the parking brake may
not securely hold the vehicle.
●If the brake actuator does not operate, do not follow other vehicles closely and
avoid downhill or sharp turns that require making. 
In this case, braking is still possible, but it will require more force on the pedal than
usual. Braking distance may also increase.
●The brake system consists of 3 individual hydraulic systems: If one of the systems
fails, the other will still operate. In this case, the brake pedal should be depressed
more firmly than usual and braking distance becomes longer.
Do not drive your vehicle with only a single brake system. Have your brakes fixed
immediately.
■If the vehicle becomes stuck or bogged
Do not spin the wheels recklessly when any of the tires is up in the air, or stuck in
sand or mud, etc. This may damage the drive system components or propel the
vehicle forward (or in another direction) and cause an accident.

159
2-1. Driving procedures
2
When driving
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Parking brake
■Usage in winter time
See “Winter driving tips” for parking brake usage in winter time. (P. 2 3 3 )
NOTICE
■Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to brake components over-
heating, which may affect braking performance and increase brake wear.
Sets the parking brake*
(Depressing the pedal again
releases the parking brake.)
*: Fully depress the parking
brake pedal with your left
foot while depressing the
brake pedal with your right
foot.
CanadaU.S.A.

164
2-2. Instrument cluster
GS_HV_U (OM30C81U)
February 1, 2010 11:03 am
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. 5 8 1 )
■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.

219
2-4. Using other driving systems
2
When driving
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Reduced effectiveness of EPS
The effectiveness of EPS is reduced to prevent the system from overheating when
there is frequent steering input over an extended period of time. The steering wheel
may feel heavy as a result. Should this occur, refrain from excessive steering input or
stop the vehicle and turn the hybrid system off. The system should return to normal
about 10 minutes.
■VGRS is disabled in the following situations
●During stopping or the steering wheel has been moved for a long time while
driving at lower speeds.
●After the hybrid system is restarted at less than -22°F (-30°C).
CAUTION
Any of the following conditions may result in an accident which could cause death or
serious injury:
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded.
●The vehicle hydroplanes while driving at high speed on a wet or slick road.
■Stopping distance when the ABS is operating will exceed that of normal condi-
tions
The ABS is not designed to shorten the vehicle’s stopping distance. Always main-
tain a safe distance from the vehicle in front of you in the following situations.
●When driving on dirt, gravel or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or roads with uneven roads
■TRAC may not operate effectively when
Directional control and power may not be achievable while driving on slippery road
surfaces, even if the TRAC is operating. 
Do not drive the vehicle in conditions where stability and power may be lost.

414
3-7. Other interior features
GS_HV_U (OM30C81U)
January 28, 2010 1:38 pm
CAUTION
■Burns
●Use caution when seating the following persons in a seat with the seat heater on
to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the disabled
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs,
cold remedies, etc.)
●Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature of the
seat and may lead to overheating.
●Do not use seat heater more than necessary.
Doing so may cause minor burns or overheating.
NOTICE
■To prevent damage to the seat heaters/ventilators
Do not put heavy objects on the seat and do not stick sharp objects (needles, nails,
etc.) into the seat.
■To prevent 12 volt battery discharge
Turn the switches off when the hybrid system is off.

582
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Overheating
In the following situations, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●Steam is coming from under the hood.
●The message “HYBRID SYSTEM OVERHEAT” is displayed on the multi-infor-
mation display.
CAUTION
■To prevent an accident or injury when inspecting under the hood of your vehicle
●If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartment may be very hot, causing serious
injury such as burns.
●Keep hands and clothing away from the fan and engine drive belt while the hybrid
system is operating.
●Do not loosen the radiator cap while the hybrid system and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam released
under pressure.
Add coolant if necessary.
Water can be used in an emer-
gency measure if coolant is
unavailable. (P. 5 9 3 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

631
Alphabetical index
GS_HV_U (OM30C81U)
February 1, 2010 11:29 am
Back-up lights
Wattage ................................................. 597
Battery
12 volt battery ...................................... 470
Checking ............................................... 470
Hybrid battery 
(Traction battery) .............................. 28
If the 12 volt battery is 
discharged ........................................ 578
Preparing and checking 
before winter .................................... 233
Bluetooth
® audio ................................... 321
Bluetooth® phone ............................... 345
Brake
Fluid .......................................................... 468
Parking brake ........................................159
Brake assist ............................................... 214
Care
Exterior ....................................................442
Interior..................................................... 445
Seat belts ............................................... 446
Cargo capacity ..................................... 228
Cargo hooks ............................................ 421
CD player/changer ............................ 282
Chains........................................................234
Child-protectors ......................................56
Child restraint system
Definition.................................................. 124
Installation................................................ 128
Installing CRS with lower 
anchors ................................................. 129
Installing CRS with seatbelts ...........131
Installing CRS with top straps .......135Child safety
Airbag precautions .............................. 114
Battery precautions ............. 472, 580
Child restraint system ........................124
Child-protectors ...................................56
How your child should wear 
the seatbelt............................................ 78
Installing child restraints................... 128
Moon roof precautions...................... 93
Power window lock switch .............. 87
Power window precautions ............89
Removed electronic key battery 
precautions....................................... 495
Seat belt comfort guide ..................... 76
Seat belt precautions .......................... 79
Seat heater precautions.................. 414
Trunk precautions................................. 62
Cigarette lighter....................................... 411
Cleaning
Exterior.................................................... 442
Interior .....................................................445
Seat belts ................................................446
Clock ........................................................ 408
Coin holder .............................................403
Compass .................................................. 429
Condenser ..............................................468
Console box ............................................ 401
Cooling system
Engine overheating............................ 581
Cruise control
Cruise control......................................... 181
Dynamic radar cruise control....... 185
Cup holders ............................................404
Curtain shield airbags.......................... 107
Customizable features ........................ 615
B
C

632
Alphabetical index
GS_HV_U (OM30C81U)
February 1, 2010 11:29 am
Daytime running light system ............172
Defogger
Rear window ........................................268
Side mirror ............................................268
Dimension ............................................... 588
Dinghy towing ........................................239
Display
Energy flow.............................................. 29
Multi-information display................ 168
Touch screen ....................................... 242
Trip information ....................................169
Warning message............................. 543
Do-it-yourself maintenance .............454
Door courtesy lights ............................395
Door pocket........................................... 405
Doors
Door lock.................................. 41, 53, 55
Rear door child protector ................ 56
Driver’s seat belt reminder light .....536
Driver’s seat position memory ........... 67
Driving
Correct posture .................................. 105
Procedures ............................................ 140
DVD player/changer..........................293
Electric power steering ....................... 214
Electronic key
If the electronic key does 
not operate properly .................... 575
Replacing battery .............................. 494Emergency, in case of
If a warning light turns on .............. 534
If a warning message is 
displayed ............................................ 543
If the electronic key does 
not operate properly ................... 575
If the hybrid system 
will not start ........................................572
If the shift lever cannot be 
shifted from “P” ................................573
If the 12 volt battery is 
discharged ....................................... 578
If you have a flat tire ........... 560, 570
If you lose your keys .........................574
If you think something is 
wrong .................................................... 531
If your vehicle becomes stuck .... 584
If your vehicle has to be stopped 
in an emergency ............................586
If your vehicle needs to be 
towed ................................................... 523
If your vehicle overheats..................581
Energy monitor ........................................ 29
Engine
ACCESSORY mode......................... 151
Compartment ..................................... 460
Hood ........................................................457
How to start the 
hybrid system.....................................150
If the hybrid system 
will not start ........................................572
Overheating ..........................................581
Power (ignition) switch ....................150D
E

635
Alphabetical index
GS_HV_U (OM30C81U)
February 1, 2010 11:29 am
Mirrors
Inside rear view mirror ...................... 83
Side mirror heater ............................. 268
Side mirrors............................................. 85
Vanity mirrors ..................................... 407
Moon roof .................................................. 90
MP3 disc ................................................. 289
Multi-information display....................168
Noise from under the vehicle .............. 18
Odometer .................................................. 161
Oil
Engine oil ............................................... 462
Opener
Fuel filler door .........................................94
Hood ....................................................... 457
Trunk........................................................... 60
Outer foot lights ................................... 395
Outside rear view mirrors
Adjusting and folding ......................... 85
Mirror position memory ....................67
Outside temperature 
display .................................................... 409
Overhead console .............................. 402
Overheating, Engine ............................581Parking brake .......................................... 159
Parking lights
Replacing light bulbs ......................... 514
Switch.......................................................... 171
Wattage ..................................................597
Personal lights ........................................ 397
Portable music player .......................... 341
Power meter .............................................. 161
Power outlet............................................. 412
Power windows ........................................ 87
Power (ignition) switch........................ 150
Pre-collision system...............................221
Radar cruise control ............................. 185
Radiator ....................................................468
Radio .......................................................... 273
Radio data system ................................ 275
Rear sunshade ........................................ 416
Rear turn signal lights
Replacing light bulbs ......................... 514
Wattage ..................................................597
Rear view monitor system.................. 210
Rear window defogger ......................268
Replacing
Electronic key battery ......................494
Fuses........................................................ 496
Light bulbs .............................................. 514
Reporting safety defects for 
U.S. owners .......................................... 624
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