2008 Lexus GS450h radiator

410
4-2. Maintenance
GS_HV_U
June 19, 2008 1:15 pm
General maintenance
Engine compartment
Luggage compartment
ItemsCheck points
Brake fluid• At the correct level? (→P. 4 2 9 )
Engine/power control unit coolant• At the correct level? (→P. 4 2 7 )
Engine oil• At the correct level? (→ P. 422)
Exhaust system• No fumes or strange sounds?
Radiator/condenser/hoses• Not blocked with foreign matter?
(→ P. 4 2 8 )
Wa s h e r f l u i d• At the correct level? ( →P. 4 3 4 )
ItemsCheck points
12 volt battery•Maintenance-free ( →P. 4 3 0 )
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 recommended that any problem you notice
should be brought to the attention of your Lexus dealer or qualified service
shop for advice.
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4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_HV_U
June 19, 2008 1:15 pm
ItemsParts and tools
Engine oil level (→P. 422)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used
only for adding engine oil)
Fuses (→ P. 4 5 6 )• Fuse with same amperage rating as
original
Headlight aim ( →P. 4 7 1 )• Phillips-head screwdriver
Radiator and condenser (→P. 4 2 8 )
Tire inflation pressure (→ P. 4 4 5 )• Tire pressure gauge
• Compressed air source
Wa s h e r f l u i d (→P. 434)
• Water washer fluid containing anti-
freeze (for winter use)
•Funnel
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4-3. Do-it-yourself maintenance
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June 19, 2008 1:15 pm
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,
observe the following precautions.
■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, power control unit, 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. Fuel fumes are flam-
mable.
■When working near the electric cooling fan or radiator grille
Be sure the “POWER” switch is OFF.
With the “POWER” switch in ON mode, the electric cooling fan may automatically
start to run if the air conditioning is on and/or the coolant temperature is high.
(→ P. 4 2 8 )
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in the eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to
dirt in the air. Also a backfire could cause a fire in the engine compartment.
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4-3. Do-it-yourself maintenance
GS_HV_U
June 19, 2008 1:15 pm
Engine compartment
■12 volt battery
→P. 4 3 0
Engine oil level dipstick
(→P. 4 2 2 )
Engine oil filler cap (→P. 423)
Brake fluid reservoir (→P. 4 2 9 )
Fuse box ( →P. 4 5 6 )Washer fluid tank
(→P. 4 3 4 )
Gasoline engine/power
control unit coolant
reservoir ( →P. 4 2 7 )
Electric cooling fans
Condenser ( →P. 4 2 8 )
Radiator ( →P. 4 2 8 )
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4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_HV_U
June 19, 2008 1:15 pm
CoolantThe coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the hybrid system is cold. Reser voir 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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4-3. Do-it-yourself maintenance
GS_HV_U
June 19, 2008 1:15 pm
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 not 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 to 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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538
5-2. Steps to take in an emergency
GS_HV_U
June 19, 2008 1:15 pm
If your vehicle overheats
If your hybrid system overheats:
Stop the vehicle in a safe place and turn off the air conditioning
system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the hybrid system and carefully lift the hood.
If you do not see steam: Leave the hybrid system running and carefully lift the hood.
Remove the engine compartment cover. ( →P. 4 2 1 )
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the engine coolant temperature gauge begins to
fall and then stop the hybrid system.
If the fan is not operating: Stop the hybrid system immediately and call your local
Lexus dealer.
After the hybrid system has
cooled down sufficiently, check
the coolant level and inspect the
radiator core (radiator) for any
leaks.STEP1
STEP2
STEP3
STEP4
STEP5
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5
When trouble arises
539
5-2. Steps to take in an emergency
GS_HV_U
June 19, 2008 1:15 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
●Keep hands and clothing away from the fan and engine drive belt while the hybrid
system is running.
●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 4 8 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6
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