coolant level Lexus GS300h 2013 Owner's Manual

1102. Instrument cluster
GS450h_300h_OM_OM30D53E_(EE)
Engine coolant temperature gauge
Displays the engine coolant temperature
Hybrid System Indicator
Displays hybrid system output or regeneration level (P. 1 1 2 )
ECO lamp and SPORT lamp
Changes colors or brightness according to driving mode or way of driving
(P. 113)
Multi-information display
Presents the driver with a variety of driving-related data (P. 1 1 4 )
Speedometer
Displays the vehicle speed
Fuel gauge
Displays the quantity of fuel remaining in the tank
Shift position and shift range
Displays the selected shift position or selected shift range (P. 256)
Odometer and trip meter display
Odometer:
Displays the total distance the vehicle has been driven
Trip meter:
Displays the distance the vehicle has been driven since the meter was last
reset. Trip meters “A” and “B” can be used to record and display different
distances independently.
Tachometer
Displays the engine speed in revolutions per minute
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7296-2. Maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
Where to go for maintenance service?
In order to maintain your vehicle in the best possible condition, Lexus rec-
ommends that maintenance service operations as well as other inspections
and repairs be carried out by authorized Lexus dealers or repairers or other
duly qualified and equipped professionals. For repairs and services covered
by your warranty, please visit an authorized Lexus dealer or repairer, who
will use genuine Lexus parts in repairing any difficulties you may encounter.
There can also be advantages in utilizing authorized Lexus dealers or repair-
ers for non-warranty repairs and services, as members of the Lexus network
will be able to expertly assist you with any difficulties you may encounter.
Your Lexus dealer or repairer, or another duly qualified and equipped profes-
sional will perform all of the scheduled maintenance on your vehicle reliably
and economically due to their experience with Lexus vehicles.
Does your vehicle need repairs?
Be on the alert for changes in performance and sounds, and visual tip-offs
that indicate service is needed. Some important clues are:
Engine missing, stumbling or pinging
Appreciable loss of power
Strange engine noises
A fluid leak under the vehicle (However, water dripping from the air condi-
tioning system after use is normal.)
Change in exhaust sound (This may indicate a dangerous carbon monoxide
leak. Drive with the windows open and have the exhaust system checked
immediately.)
Flat-looking tires, excessive tire squeal when cornering, uneven tire wear
Vehicle pulls to one side when driven straight on a level road
Strange noises related to suspension movement
Loss of brake effectiveness, spongy feeling brake pedal, pedal almost
touches the floor, vehicle pulls to one side when braking
Engine coolant temperature continually higher than normal (P. 1 1 0 )
If you notice any of these clues, take your vehicle to any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional as
soon as possible. Your vehicle may need adjustment or repair.

731
6 6-3. Do-it-yourself maintenance
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the cor-
rect procedure as given in these sections.
ItemsParts and tools
12-volt battery condition (P. 749)
•Grease
• Conventional wrench
(for terminal clamp bolts)
Engine/power control unit
coolant level (P. 744)
•“To y o t a Super Long Life Cool-
ant” or a similar high quality eth-
ylene glycol-based non-silicate,
non-amine, non-nitrite and non-
borate coolant with long-life
hybrid organic acid technology
“Toyota Super Long Life Cool-
ant” is pre-mixed with 50% cool-
ant and 50% deionized water.
• Funnel (used only for adding
coolant)
Engine oil level (P. 741)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel
• Funnel (used only for adding
engine oil)
Fuses (P. 782)• Fuse with same amperage rating
as original

733 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
When working near the electric cooling fans or radiator grille
Be sure the power switch is off.
With the power switch in ON mode, the electric cooling fans may automat-
ically start to run if the air conditioning is on and/or the coolant temperature
is high.
(P. 747)
Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.
from getting in your 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.
If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads
wear or when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious problem.

7386-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30D53E_(EE)
Engine compartment
GS300h
12-volt battery
P. 7 4 9
Power control unit coolant
reservoir (P. 745)
Engine oil level dipstick
(P. 741)
Engine oil filler cap (P.
742)
Engine coolant reservoir
(P. 744)Fuse box (P. 782)
Washer fluid tank (P. 748)
Electric cooling fans
Condenser (P. 747)
Radiator (P. 747)1
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739 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
GS450h
12-volt battery
P. 7 4 9
Engine oil level dipstick
(P. 741)
Engine coolant reservoir
(P. 744)
Engine oil filler cap (P.
742)
Power control unit coolant
reservoir (P. 745)Fuse box (P. 782)
Washer fluid tank (P. 748)
Electric cooling fans
Condenser (P. 747)
Radiator (P. 747)1
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7446-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30D53E_(EE)
The coolant level is satisfactory if it is between the “FULL” and
“LOW” lines on the reservoir when the hybrid system is cold.
Engine coolant reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW” line, add coolant up to the
“FULL” line. (P. 915)
Coolant
GS300hGS450h
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745 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
Power control unit coolant reservoir
GS300hGS450h
Reservoir cap
“F” line
“L” lineReservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“L” line, add coolant up to the
“F” line. (P. 9 1 5 )If the level is on or below the
“LOW” line, add coolant up to
the “FULL” line. (P. 915)
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7466-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30D53E_(EE)
Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality eth-
ylene glycol based non-silicate, non-amine, non-nitrite, and non-borate cool-
ant with long-life hybrid organic acid technology.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50%
deionized water. (Minimum temperature: -35C [-31F])
For more details about coolant, contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/power control unit coolant reser-
voir caps, drain cock and water pump.
If you cannot find a leak, have any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional, test the cap and check for
leaks in the cooling system.
CAUTION
When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir caps or the
coolant inlet cap. (P. 9 2 1 )
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
When adding 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.

829
7 7-2. Steps to take in an emergency
When trouble arises
GS450h_300h_OM_OM30D53E_(EE)
If you think something is wrong
Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
Flat-looking tires or uneven tire wear
Engine coolant temperature gauge needle continually points
higher than normal.
Changes in exhaust sound
Excessive tire squeal when cornering
Strange noises related to the suspension system
Pinging or other noises related to the hybrid system
Engine missing, stumbling or running roughly
Appreciable loss of power
Vehicle pulls heavily to one side when braking
Vehicle pulls heavily to one side when driving on a level road
Loss of brake effectiveness, spongy feeling, pedal almost
touches the floor
If you notice any of the following symptoms, your vehicle proba-
bly needs adjustment or repair. Contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped profes-
sional as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms