2009 Lexus GS450h radiator cap

438
4-3. Do-it-yourself maintenance
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Engine compartment
■12 volt battery
→P. 4 4 7
Engine oil level dipstick
(→P. 4 4 0 )
Engine oil filler cap (→P. 4 4 1 )
Brake fluid reservoir (→P. 4 4 6 )
Fuse box ( →P. 4 74 )Washer fluid tank
(→P. 4 5 1 )
Gasoline engine/power
control unit coolant
reservoir ( →P. 444)
Electric cooling fans
Condenser ( →P. 445)
Radiator ( →P. 445)
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444
4-3. Do-it-yourself maintenance
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
CoolantThe coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the hybrid system is cold. Reservoir cap
“FULL”
“LOW”
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line.
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, reservoir cap, radiator cap, drain cock and water
pump.
If you cannot find a leak, have your Lexus dealer pressure test the cap and check for
leaks in the cooling system.
■Coolant selection
Only use “Toyota Super Long Life Coolant” or similar high quality ethylene glycol
based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life
hybrid organic acid technology.U.S.A.: “Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deionized water. (Enabled: -31 °F [-35 °C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deionized water. (Enabled: -44 °F [-42 °C])
For more details about coolant, contact your Lexus dealer.
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445
4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Radiator and condenserCheck the radiator and condenser and clear any foreign objects.
If either of the above parts are extremely dirty or you are not sure of their
condition, have your vehicle checked by your Lexus dealer.
CAUTION
■When the hybrid system is hot
Do not remove the radiator and reservoir cap.
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing burns or other injuries.
NOTICE
■When adding the coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water
and antifreeze must be used to provide proper lubrication, corrosion protection
and cooling. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.
CAUTION
■When the hybrid system is hot
Do not touch the radiator or condenser, as they may be hot and you may be burned.
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558
5-2. Steps to take in an emergency
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■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 food, do not open the food 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. 569)
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6
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609
Alphabetical index
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Parking brake .......................................... 157
Parking lightsReplacing light bulbs ....................... 492
Switch ........................................................169
Wattage ................................................. 573
Personal lights ......................................... 371
Portable music player .......................... 319
Power meter ............................................ 159
Power outlet ........................................... 385
Power windows........................................ 85
Pre-collision system .............................. 221
Radar cruise control .............................183
Radiator.................................................... 445
Radio ........................................................... 261
Radio data system.................................263
Rear sunshade....................................... 389
Rear turn signal lights
Replacing light bulbs ....................... 492
Wattage ................................................. 573
Rear view monitor system .................. 210
Rear window defogger ...................... 256
Replacing Electronic key battery ......................472
Fuses .........................................................474
Light bulbs ............................................ 492
Reporting safety defects for U.S. owners ......................................... 598
Seat belts Adjusting the seat belt ........................ 74
Automatic locking retractor.............76
Child restraint system installation ............................................ 125
Cleaning and maintaining the seat belts......................................424 Emergency locking retractor.......... 76
How to wear your seat belt ............. 74
How your child should wear
the seat belt ...........................................77
Pre-collision seat belts ....................... 76
Pregnant women, proper seat belt use ......................... 76
Reminder light ...................................... 512
Seat belt extenders ...............................77
Seat belt pretensioners ...................... 75
Seat heaters/ventilators..................... 387
Seating capacity ....................................386
Seats Adjustment ............................................... 64
Adjustment precautions ....................65
Child seats/child restraint
system installation............................ 125
Cleaning ................................................. 423
Driver’s seat position memory .......66
Head restraint ......................................... 70
Properly sitting in the seat ................ 101
Seat heaters ......................................... 386
Service reminder indicators ............. 163
Shift lever If the shift lever cannot be shifted from “P” ............................... 548
Transmission.......................................... 152
Shift lock system ....................................548
Shopping bag hooks............................ 392
Side airbags.............................................. 103
Side marker lights Switch........................................................ 169
Side mirror Adjusting and folding..........................83
Mirror position memory....................66P
R
S
GS450h_HV_U.book Page 609 Monday, April 27, 2009 10:10 AM