2010 Lexus IS250C battery

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4-2. Maintenance
10_IS250C/350C_U
General maintenance
Engine compartment
ItemsCheck points
BatteryMaintenance-free. (→P. 4 0 2 )
Brake fluidAt the correct level? ( →P. 4 0 0 )
Engine coolantAt the correct level? ( →P. 3 9 8 )
Engine oilAt the correct level? ( →P. 3 9 5 )
Exhaust systemNo fumes or strange sounds?
Radiator/condenser/hosesNot blocked with foreign matter?
(→ P. 4 0 0 )
Wa s h e r f l u i dAt the correct level? ( →P. 4 0 5 )
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.

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4-2. Maintenance
4
Maintenance and care
10_IS250C/350C_U
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include
OBD (On Board Diagnostics) checks. The OBD system monitors the oper-
ation of the emission control system.
■If the malfunction indicator lamp comes on
The OBD system determines that a problem exists somewhere in
the emission control system. Your vehicle may not pass the I/M test
and may need to be repaired. Cont act your Lexus dealer to service
the vehicle.
■ Your vehicle may not pass the I/M test:
●When the battery is disconnected or discharged
Readiness codes that are set du ring ordinary driving are erased.
Also, depending on your driving habits, the readiness codes may
not be completely set.
● When the fuel tank cap is loose
The malfunction indicator lamp comes on as a temporary mal-
function and your vehicle may not pass the I/M test.
■ When the malfunction indicator la mp goes off after several driv-
ing trips
The error code in the OBD system will not be cleared unless the
vehicle is driven 40 or more times.
■ If your vehicle does not pass the I/M test
Contact your Lexus dealer to prepare the vehicle for re-testing.

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10_IS250C/350C_U
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. 4 0 2)
•Warm water
• Baking soda
•Grease
•Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( →P. 4 0 0 )
• 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. 3 9 8 )
• “Toyota Super Long Life Coolant”
or similar high-quality ethylene gly-
col-based non-silicate, non-amine,
non-nitrite 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
10_IS250C/350C_U
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, radiator, exhaust manifold, etc. right after driv-
ing 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 or the battery. Fuel
and battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.
ItemsParts and tools
Engine oil level (→P. 3 9 5 )
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used
only for adding engine oil)
Fuses (→ P. 4 2 7 )• Fuse with same amperage rating as
original
Tire inflation pressure ( →P. 4 1 6 )• Tire pressure gauge
• Compressed air source
Headlight aim ( →P. 4 4 2 )• Phillips-head screwdriver
Radiator and condenser ( →P. 4 0 0 )
Wa s h e r f l u i d ( →P. 4 0 5 )
• Water washer fluid containing anti-
freeze (for winter use)
•Funnel

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4-3. Do-it-yourself maintenance
10_IS250C/350C_U
Engine compartment
IS350C
Battery (→P. 4 0 2 )
Engine oil level dipstick (→P. 395)
Engine oil filler cap (→P. 395)
Brake fluid reservoir (→P. 4 0 0 )
Fuse boxes ( →P. 4 2 7 )Washer fluid tank
(→P. 405)
Electric cooling fans
Condenser ( →P. 4 0 0 )
Radiator ( →P. 4 0 0 )
Engine coolant reservoir (→P. 398)

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4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U
IS250C
Battery (→P. 4 0 2 )
Engine oil level dipstick (→P. 395)
Engine oil filler cap (→P. 395)
Brake fluid reservoir (→P. 4 0 0 )
Fuse boxes ( →P. 4 2 7 )Washer fluid tank
(→P. 405)
Electric cooling fans
Condenser ( →P. 4 0 0 )
Radiator ( →P. 4 0 0 )
Engine coolant reservoir (→P. 398)

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4-3. Do-it-yourself maintenance
10_IS250C/350C_U
BatteryCheck the battery as follows.
■ Battery exterior
Make sure that the battery terminals are not corroded and that there
are no loose connections, cracks, or loose clamps.
Terminals
Hold-down clamp

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4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U■
Checking battery condition
Check the battery condition using the indicator color.
Blue: Good condition
Red: Not working properly,
have the battery checked by
your Lexus dealer.
White: Charging is necessary.
Have the vehicle inspected by
your Lexus dealer.
■Before recharging
When recharging, the battery produces hydrogen gas which is flammable and
explosive. Therefore, before recharging:
●If recharging with the battery installed on the vehicle, be sure to disconnect the
ground cable.
●Make sure the power switch on the charger is off when connecting and discon-
necting the charger cables to the battery.
■After recharging/reconnecting the battery
In some cases, the engine may not start. Follow the procedure bellow to initialize
the system.Shift the shift lever to P (automatic transmission) or depress the brake
pedal with the shift lever in N (manual transmission), and turn the
“ENGINE START STOP” switch OFF.
Open and close any of the doors.
Start the engine. (If the engine does not start first time, repeat the proce-
dure.)
If the engine will not start even after multiple attempts at the above method, contact
your Lexus dealer.
STEP1
STEP2
STEP3