2012 Lexus HS250h Owner's Manual

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4-2. Maintenance
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■Reset the maintenance data (U.S.A. only)
After the required maintenance is performed according to the maintenance sched-
ule, please reset the maintenance data.
To reset the data, follow the procedures described below:Switch the display to the trip meter “A” when the hybrid system is operat-
ing. (→P. 1 7 0 )
Turn the “POWER” switch off.
While pressing the trip meter reset button ( →P. 170), turn the “POWER”
switch to ON mode (do not start the hybrid system because otherwise
the reset mode will be canceled). Continue to press and hold the button
until the trip meter displays “000000” and the multi-information display
indicates that the reset is complete.
■Allow inspection and repairs to be performed by a Lexus dealer
●Lexus technicians are well-trained specialists and are kept up to date with the
latest service information. They are well informed about the operation of all sys-
tems on your vehicle.
●Keep a copy of the repair order. It proves that the maintenance that has been
performed is under warranty coverage. If any problem should arise while your
vehicle is under warranty, your Lexus dealer will promptly take care of it.

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Maintenance and care
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CAUTION
■If your vehicle is not properly maintained
Improper maintenance could result in serious damage to the vehicle and possible
serious injury or death.
■Handling of the 12-volt battery
●Engine exhaust, some of its constituents, and a wide variety of automobile com-
ponents contain or emit chemicals known to the State of California to cause can-
cer and birth defects and other reproductive harm. Work in a well ventilated area.
●Oils, fuels and fluids contained in vehicles as well as waste produced by compo-
nent wear contain or emit chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm. Avoid exposure and wash
any affected area immediately.
●12-volt battery posts, terminals and related accessories contain lead and lead
compounds which are known to cause brain damage. Wash your hands after
handling. (→P. 4 4 7 )

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General maintenance
Engine compartment
Tr u n k
ItemsCheck points
Brake fluidIs the brake fluid at the correct level?(→ P. 4 4 5 )
CoolantIs the engine coolant at the correct
level? (→ P. 4 4 2 )
Engine oilIs the engine oil at the correct level?
(→ P. 4 3 9 )
Exhaust systemThere should not be any fumes or
strange sounds.
Radiator/condenser
The radiator and condenser should
be free from foreign objects.
(→ P. 444)
Wa s h e r f l u i dIs there sufficient washer fluid?
(→ P. 446)
ItemsCheck points
12-volt batteryCheck the connections. ( →P. 4 4 7 )
Listed below are the general maintenance items that should be performed
at the intervals specified in the “Warranty and Service Guide” or “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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Maintenance and care
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Vehicle interior
ItemsCheck points
Accelerator pedal
• The accelerator pedal should move smoothly (without uneven pedal
effort or catching).
Brake pedal
• Does the brake pedal move smoothly?
• Does the brake pedal have appro- priate clearance from the floor?
(→ P. 5 6 6 )
• Does the brake pedal have the cor- rect amount of free play?
(→ P. 5 6 6 )
Brakes
• The vehicle should not pull to one
side when the brakes are applied.
• The brakes should work effectively.
• The brake pedal should not feel spongy.
• The brake pedal should not get too close to the floor when the brakes
are applied.
Head restraints• Do the head restraints move smoothly and lock securely?
Hybrid transmission “Park” mecha-
nism• Can the vehicle be held securely on an incline with the shift position
in P?
Indicators/buzzers• Do the indicators and buzzers
function properly?
Lights• Do all the lights come on?

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ItemsCheck points
Parking brake
• Does the parking brake pedal move smoothly?
• When parked on a slope and the parking brake is on, is the vehicle
securely stopped?
Seat belts
• Do the seat belts operate smoothly?
• The seat belts should not be dam-
aged.
Seats• Do the seat controls operate prop-erly?
Steering wheel
• Does the steering wheel rotate smoothly?
• Does the steering wheel have the correct amount of free play?
• There should not be any strange sounds coming from the steering
wheel.

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Maintenance and care
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Vehicle exterior
ItemsCheck points
Doors/trunk• Do the doors and trunk operate smoothly?
Engine hood• Does the engine hood lock system work properly?
Fluid leaks
• There should not be any signs of fluid leakage after the vehicle has
been parked.
Ti r e s
• Is the tire inflation pressure cor-rect?
• The tires should not be damaged or excessively worn.
• Have the tires been rotated
according to the maintenance
schedule?
• The wheel nuts should not be loose.
CAUTION
■If the hybrid system is operating
Turn the hybrid system off and ensure that there is adequate ventilation before per-
forming maintenance checks.

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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 in the following situations:
● When the 12-volt battery is disconnected or discharged
Readiness codes that are set dur ing 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 indicating a temporary
malfunction and your vehicle may not pass the I/M test.
■ When the malfunction indicator lamp still remains on after several
driving 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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4-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct pro-
cedure as given in these sections.
ItemsParts and tools
12-volt battery condition ( →P. 4 4 7 )
•Grease
•Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( →P. 4 4 5 )
• FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power control unit coolant
level (→ P. 4 4 2 )
• “Toyota Super Long Life Coolant”
or a similar high quality ethylene
glycol 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 cool- ant)