2007 Lexus IS250 engine coolant

109
2
When driving
2-2. Instrument cluster
Gauges and meters
The units used on the speedometer and the tachometer gauge display may
differ depending on the model/type.

The following gauges, meters and display illuminate when the engine
switch is in IG-ON mode.
Speedometer
Displays the vehicle speed.
Multi-information display
P. 118
Tachometer
Displays the engine speed in revolutions per minute.
Tacho indicator
When the set engine speed is reached while driving, this ring-shaped indi-
cators comes on in yellow. The indicator comes on in red when the engine
speed reaches a dangerous range.
Engine coolant temperature gauge
Displays the engine coolant temperature.

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2-5. Driving information
2
When driving
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 appropriate to the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Washer fluid
• Have a service technician inspect the 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 specified size and the same 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 window 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 accumulated 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.

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4-2. Maintenance
4
Maintenance and care
General maintenance
Engine compartment
ItemsCheck points
BatteryMaintenance-free. (P. 2 7 9 )
Brake fluidAt the correct level? (P. 2 7 8 )
Engine coolantAt the correct level? (P. 2 76 )
Engine oilAt the correct level? (P. 2 7 2 )
Exhaust systemNo fumes or strange sounds?
Radiator/condenser/hosesNot blocked with foreign matter?
(P. 2 7 8 )
Wa s h e r f l u i dAt the correct level? (P. 2 8 2 )
Listed below are the general maintenance items that should be performed
at the intervals specified in the “Warranty and Services Guide” or “Owners
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.

263
4
Maintenance and care
4-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance yourself, be sure to follow the correct proce-
dure given in these sections.
ItemsParts and tools
Battery condition (P. 2 7 9)
•Warm water
• Baking soda
•Grease
•Conventional wrench
(for terminal clamp bolts)
Brake fluid level (P. 2 7 8 )
• FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake
fluid)
Engine coolant level (P. 2 76 )
• “Toyota Super Long Life Coolant”
or similar high-quality ethylene gly-
col-based non-silicate, non-amine,
non-nitrate and non-borate coolant
with long-life hybrid organic acid
technology.
For the U.S.A.:
“Toyota Super Long Life Coolant”
is pre-mixed with 50% coolant and
50% deionized water.
For Canada:
“Toyota Super Long Life Coolant”
is pre-mixed with 55% coolant and
45% deionized water.
• Funnel (used only for adding
engine coolant)

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4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
■When working near the electric cooling fan or radiator grille:
Be sure the engine switch is OFF.
With the engine switch in IG-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. 2 7 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:
Driving with the air filter removed may cause excessive engine wear due to dirt in
the air. Also a backfire could cause a fire in the engine compartment.

269
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compartment
IS350
Battery (P. 2 7 9 )
Engine oil level dipstick
(P. 2 7 2 )
Engine oil filler cap
(P. 2 7 2 )
Brake fluid reservoir
(P. 2 7 8 )
Fuse boxes (P. 304)Washer fluid tank
(P. 2 8 2 )
Electric cooling fans
Condenser (P. 2 7 8 )
Radiator (P. 2 7 8 )
Engine coolant reservoir
(P. 2 76 )

270
4-3. Do-it-yourself maintenance
IS250
Battery (P. 2 7 9 )
Engine oil level dipstick
(P. 2 7 2 )
Engine oil filler cap
(P. 2 7 2 )
Brake fluid reservoir
(P. 2 7 8)
Fuse boxes (P. 304)
Washer fluid tank
(P. 2 8 2 )
Electric cooling fans
Condenser (P. 2 7 8 )
Radiator (P. 2 7 8 )
Engine coolant reservoir
(P. 2 76 )

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4-3. Do-it-yourself maintenance
Engine coolant
The coolant level is satisfactory if it is between the FULL and LOW lines
on the reservoir when the engine is cold.
Reservoir cap
Full
Low
If the level is on or below the LOW
line, add coolant up to the FULL
line.
NOTICE
■To prevent serious engine damage:
Check the oil level on regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly tightened.