check engine light Lexus HS250h 2011 Do-it-yourself maintenance / LEXUS 2011 HS250H OWNERS MANUAL (OM75037U)

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3-6. Using the storage featuresList of storage features............... 367
• Glove box ................................... 368
• Console box ................................ 369
• Cup holders.................................. 371
• Bottle holders ............................. 373
• Auxiliary boxes........................... 374
3-7. Other interior features Sun visors......................................... 375
Vanity mirrors ................................ 376
Clock ................................................. 377
Power outlets ................................. 378
Seat heaters and ventilators ..................................... 379
Armrest ............................................. 381
Rear sunshade .............................. 382
Floor mat......................................... 384
Trunk compartment features......................................... 386
Garage door opener................. 388
Compass.......................................... 396
Safety Connect ............................ 400 4-1. Maintenance and care
Cleaning and protecting the vehicle exterior.................. 408
Cleaning and protecting the vehicle interior ..................... 412
4-2. Maintenance Maintenance requirements ...... 415
General maintena nce .................. 417
Emission inspection and maintenance (I/M)
programs ....................................... 421
4-3. Do-it-yourself maintenance Do-it-yourself service precautions .................................. 422
Hood ................................................. 425
Positioning a floor jack............... 426
Engine compartment.................. 428
12-volt battery................................ 439
Tires ................................................... 443
Tire inflation pressure.................. 451
Wheels ............................................. 454
Air conditioning filter.................. 456
Electronic key battery ................ 459
Checking and replacing fuses ................................................. 461
Headlight aim (LED headlights) ....................... 473
Light bulbs ....................................... 475
4Maintenance and care

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2-1. Driving procedures
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When driving
CAUTION
■When starting the vehicle
Always keep your foot on the brake pedal while stopped with the hybrid system
operating. This prevents the vehicle from creeping.
■When driving the vehicle
●Do not drive if you are unfamiliar with the location of the brake and accelerator
pedals to avoid depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the brake pedal will
result in sudden acceleration that may le ad to an accident that could result in
death or serious injury.
• When backing up, you may twist your bo dy around, leading to a difficulty in
operating the pedals. Make sure to operate the pedals properly.
• Make sure to keep a correct driving posture even when moving the vehicle only slightly. This allows you to depress the brake and accelerator pedals
properly.
• Depress the brake pedal using your right foot. Depressing the brake pedal using your left foot may delay response in an emergency, resulting in an acci-
dent.
●The driver should pay extra attention to pedestrians when the vehicle is powered
only by the electric motor (traction motor). Because there is no engine noise, the
pedestrians may misjudge the vehicle’s movement.
●Do not drive the vehicle over or stop the vehicle near flammable materials.
The exhaust system and exhaust gases can be extremely hot. These hot parts may
cause a fire if there is any flammable material nearby.
●Do not let the vehicle roll backward whil e a forward driving position is selected,
or roll forward while R is selected.
Doing so may result in an acci dent or damage to the vehicle.
●If the smell of exhaust is noticed inside the vehicle, open the windows and check
that the trunk is closed. Large amounts of exhaust in the vehicle can cause driver
drowsiness and an accident, resulting in death or a serious health hazard. Have
the vehicle inspected by your Lexus dealer immediately.

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2-1. Driving procedures
CAUTION
●Do not select shift position R when the vehicle is rolling forward, do not select D
when moving in reverse, and do not press the P position switch before the vehicle
stops fully. Doing so will cause the buzzer to sound and the shift position to
change to N. In addition, excessive forc e will be applied to the powertrain and
damage may result.
●Do not change the shift position to N while the vehicle is moving.
Doing so may cause insufficient engine braking, resulting in an accident.
●Do not turn the hybrid system off while driving.
The power steering and brake actuator will not operate properly if the hybrid sys-
tem is off.
●Use engine braking (shift position B) to maintain a safe speed when driving down
a steep hill.
Using the brakes continuously may cause the brakes to overheat and lose effec-
tiveness. ( P. 1 5 5 )
●Do not adjust the positions of the steering wheel, the seat, or the inside or outside
rear view mirrors while driving.
Doing so may result in a loss of vehicle control that can cause accidents, resulting
in death or serious injury.
●Always check that all passengers' arms, heads or other parts of their body are not
outside the vehicle, as this may result in death or serious injury.
●Do not drive in excess of the speed limit. Even if the legal speed limit permits it, do
not drive over 85 mph (140 km/h) unless your vehicle has high-speed capability
tires. Driving over 85 mph (140 km/h) may result in tire failure, loss of control and
possible injury. Be sure to consult a tire dealer to determine whether the tires on
your vehicle are high-speed capability tires or not before driving at such speeds.
■When driving on slippery road surfaces
●Sudden braking, acceleration and steer ing may cause tire slippage and reduce
your ability to control the vehi cle, resulting in an accident.
●Abrupt changes from shift position D to B and rapid changes in the engine speed
could cause the vehicle to skid, resulting in an accident.
●After driving through a pudd le, lightly depress the brake pedal to make sure that
the brakes are functioning properly. Wet brake pads may prevent the brakes from
functioning properly. If the brakes on on ly one side are wet and not functioning
properly, steering control may be af fected, resulting in an accident.

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2-1. Driving procedures
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When driving
CAUTION
■When changing the shift position
Be careful not to change the shift position with the accelerator pedal depressed.
Changing the shift position to any positions other than P or N may cause the vehicle
to accelerate abruptly, causing an accident and resulting in death or serious injury.
■If you hear a squealing or scraping no ise (brake pad wear limit indicators)
Have your Lexus dealer check and replac e the brake pads as soon as possible.
Rotor damage may result if the pa ds are not replaced when needed.
It is dangerous to drive the vehicle when the wear limits of the brake pads and/or
those of the brake discs are exceeded.
■When the vehicle is stopped
●Do not depress the accelerator pedal unnecessarily.
If the vehicle is in any shift position other than P or N, the vehicle may accelerate
suddenly and unexpectedly , causing an accident.
●Do not leave the vehicle with the hybrid system on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and
check that exhaust fumes do no t enter the vehicle interior.
●In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while the “READY” indicator is on. Apply the parking
brake as necessary.
●If the vehicle is stopped on an incline, in order to prevent accidents caused by the
vehicle rolling forward or backward, always depress the brake pedal and securely
apply the parking brake as needed.
●Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause the
exhaust system to overheat, which could result in a fire if combustible material is
nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in the vehi-
cle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a fire.
• The temperature inside the vehicle may cause the plastic lenses and plastic material of glasses to deform or crack.

Maintenance and care4
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4-1. Maintenance and careCleaning and protecting the vehicle exterior............ 408
Cleaning and protecting the vehicle interior ............... 412
4-2. Maintenance Maintenance requirements ......................... 415
General maintenance ........... 417
Emission inspection and maintenance (I/M)
programs................................. 421 4-3. Do-it-yourself maintenance
Do-it-yourself service precautions ........................... 422
Hood .......................................... 425
Positioning a floor jack ......... 426
Engine compartment ........... 428
12-volt battery ........................ 439
Tires............................................ 443
Tire inflation pressure............ 451
Wheels ...................................... 454
Air conditioning filter ........... 456
Electronic key battery.......... 459
Checking and replacing fuses .......................................... 461
Headlight aim (LED headlights) ................. 473
Light bulbs ................................. 475

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4-3. Do-it-yourself maintenance
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Maintenance and care
Light bulbs
You may replace the following bulbs by yourself. The difficulty level of
replacement varies depending on the bulb. If necessary bulb replacement
seems difficult to perform, contact your Lexus dealer.
For more information about replacing other light bulbs, contact your Lexus
dealer.
■ Preparing for light bulb replacement
Check the wattage of the light bulb to be replaced. ( P. 564)
■ Remove the engine compartment covers
 P. 4 2 9
■ Front bulb locations
Halogen headlights
Front side marker light Headlight low beam
Parking light
Front turn signal light
Front fog lightHeadlight high beam
and daytime running light

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5-2. Steps to take in an emergency
If your vehicle overheats
Correction procedures■ If the engine coolant temperature warning light comes on or flashes
Stop the vehicle in a safe place and turn off the air conditioning
system.
Check to see if steam is coming out from the engine area.
If you see steam:
Stop the hybrid system. Carefully lift the hood after the steam
subsides and then restart the hybrid system.
If you do not see steam:
Leave the hybrid system operating and carefully lift the hood.
Check to see if the cooling fans are operating.
If the fans are operating:
Wait until the high engine coolant temperature warning light goes
off and then stop the hybrid system.
If the fans are not operating:
Stop the hybrid system immediately and call your Lexus dealer.
The following may indicate that your vehicle is overheating:
●The high engine coolant temperature warning light comes on or
flashes:
The engine may be overheating.
● “HYBRID SYSTEM OVERHEAT” is sh own on the multi-information
display:
The power control unit may be overheating.
Follow the correction procedure as described below.

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5-2. Steps to take in an emergency
After the hybrid system has cooled
down, check the power control
unit coolant level and inspect the
cooling system for leaks.
If the engine compartment cover
needs to be removed. (P. 4 2 9 )
Add power control unit coolant if
necessary.
Water can be used in an emer-
gency if power control unit coolant
is unavailable. ( P. 5 6 0 )
Have the vehicle inspected at the ne arest Lexus dealer as soon as possi-
ble.
■Overheating
The following symptoms may occur wh en your vehicle is overheating:
●The high engine coolant temperature warn ing light comes on or flashes, or the
hybrid system output decreases.
●Steam comes out from the engine area.
●“HYBRID SYSTEM OVERHEAT” is displayed on the multi-information display.

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Alphabetical index
If you have a flat tire ......................... 527
If you lose your keys.........................539
If you think something is wrong ...................................................495
If your electronic key does not operate properly ....................540
If your vehicle becomes stuck..... 552
If your vehicle has to be stopped in an emergency .............................554
If your vehicle needs to be towed ...................................................489
If your vehicle overheats ................548
Emergency flasher Switch ..................................................... 488
Engine Accessory mode ................................ 148
Compartment ..................................... 428
Engine switch......................................... 147
Hood........................................................ 425
How to start the engine.................... 147
How to start the hybrid system .................................................... 147
Identification number.......................556
If the engine will not start ............... 537
If the hybrid system will not start........................................................ 537
Ignition switch........................................ 147
Overheating.........................................548
Power switch ......................................... 147
Engine compartment cover ............. 429 Engine coolant
Capacity ................................................ 560
Checking................................................434
Preparing and checking before winter.....................................249
Engine/power control unit coolant Capacity ................................................ 560
Checking................................................434
Preparing and checking before winter.....................................249
Engine immobilizer system ................. 98
Engine oil Capacity ................................................558
Checking............................................... 430
Preparing and checking before winter.....................................249
Engine oil maintenance data ........... 432
Engine switch ........................................... 147
Enhanced VSC ..................................... 229
EPS ............................................................. 229
EV drive mode switch ..........................152
Event data recorder ............................ 496
Floor mat .................................................. 384
Fluid Brake ....................................................... 562
Washer................................................... 438
Fog lights Replacing light bulbs ........................475
Switch ........................................................ 197
Wattage ................................................. 564
F

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Alphabetical index
Warning buzzersBrake system .......................................498
Open door ........................................... 501
Seat belt reminder.............................. 501
Warning lights AFS OFF................................................ 499
Anti-lock brake system................... 499
Brake assist system........................... 499
Brake system .......................................498
Charging system ...............................498
Cruise control ..................................... 499
Electric power steering warning light ..................................... 499
Electronic engine control system .................................................. 499
High coolant temperature ............498
Hybrid battery system ..................... 499
LKA........................................................... 499
Low fuel level ........................................ 501
Low tire pressure................................ 501
Malfunction indicator lamp........... 499
Master warning light ......................... 501
Open door ............................................ 501
Pre-collision system ......................... 499
Pretensioner ......................................... 499
Radar cruise control......................... 499
Seat belt reminder light ................... 501
Slip indicator ........................................ 499
SRS airbags .......................................... 499
Tire pressure warning light ............ 501 Warning messages
Cruise control .....................................508
Dynamic radar cruise control ........................................508, 511
Electric power steering system..................................................508
Engine oil maintenance......................511
Engine oil pressure........................... 507
EV drive mode .......................................511
Headlight ...............................................508
Hood ...........................................................511
Hybrid system..................................... 507
Intuitive parking assist ............508, 511
Key .............................................................. 519
Lane-Keeping Assist ...........................511
Moon roof.................................................511
Open door ...............................................511
Parking brake..........................................511
Pre-collision system................508, 511
Smart access system with push start.............................................. 519
Tire pressure warning system......................................................511
Trunk............................................................511
Washer fluid ............................................511
Washer Checking............................................... 438
Preparing and checking before winter.....................................249
Switch ........................................................198
Washing and waxing...........................408W