2012 Lexus HS250h check engine light

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HS250h_U_75050U
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3-6. Using the storage featuresList of storage features............... 377
• Glove box .................................... 378
• Console box ................................ 379
• Cup holders.................................. 381
• Bottle holders ............................ 383
• Auxiliary boxes.......................... 384
3-7. Other interior features Sun visors........................................ 385
Vanity mirrors ............................... 386
Clock ................................................. 387
Power outlets ................................ 388
Seat heaters and ventilators .................................... 389
Armrest ............................................. 391
Rear sunshade ............................... 392
Floor mat.......................................... 394
Trunk compartment features.......................................... 396
Garage door opener................. 398
Compass.......................................... 404
Safety Connect ............................ 408
4-1. Maintenance and care Cleaning and protecting the vehicle exterior.................... 416
Cleaning and protecting the vehicle interior .................... 420 4-2. Maintenance
Maintenance requirements ..... 423
General maintenance ................ 426
Emission inspection and maintenance (I/M)
programs ..................................... 430
4-3. Do-it-yourself maintenance Do-it-yourself service precautions ................................... 431
Hood ................................................. 434
Positioning a floor jack............... 435
Engine compartment.................. 437
12-volt battery................................ 447
Tires .................................................... 451
Tire inflation pressure................. 459
Wheels ............................................. 462
Air conditioning filter.................. 464
Electronic key battery ................ 467
Checking and replacing fuses ................................................ 469
Light bulbs ........................................ 481
5-1. Essential information Emergency flashers .................... 494
If your vehicle needs to be towed ....................................... 495
If you think something is wrong .............................................. 501
4Maintenance and care5When trouble arises

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2-1. Driving procedures
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When driving
HS250h_U_75050U
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 willresult in sudden acceleration that may lead to an accident that could result in
death or serious injury.
• When backing up, you may twist your body 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 while a forward driving position is selected,
or roll forward while R is selected.
Doing so may result in an accident 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.
●Do not shift the shift position to P while the vehicle is moving.
Doing so can damage the transmission and may result in a loss of vehicle control.
●Do not shift the shift position to R while the vehicle is moving forward.
Doing so can damage the transmission and may result in a loss of vehicle control.

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2-1. Driving procedures
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When driving
HS250h_U_75050U
CAUTION
●After driving through a puddle, 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 only one side are wet and not functioning
properly, steering control may be affected, resulting in an accident.
■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.
After changing the shift position, make sure to confirm the current shift position dis-
played on the shift position indicator inside the meter.
■If you hear a squealing or scraping noise (brake pad wear limit indicators)
Have your Lexus dealer check and replace the brake pads as soon as possible.
Rotor damage may result if the pads 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 not 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.

Maintenance and care4
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HS250h_U_75050U
4-1. Maintenance and careCleaning and protecting the vehicle exterior.............. 416
Cleaning and protecting the vehicle interior .............. 420
4-2. Maintenance Maintenance requirements ........................ 423
General maintenance .......... 426
Emission inspection and maintenance (I/M)
programs............................... 430 4-3. Do-it-yourself maintenance
Do-it-yourself service precautions ............................ 431
Hood .......................................... 434
Positioning a floor jack ......... 435
Engine compartment ........... 437
12-volt battery ........................ 447
Tires............................................. 451
Tire inflation pressure........... 459
Wheels ...................................... 462
Air conditioning filter ........... 464
Electronic key battery........... 467
Checking and replacing fuses ........................................ 469
Light bulbs................................. 481

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4-3. Do-it-yourself maintenance
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Maintenance and care
HS250h_U_75050U
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. 568)
■ Remove the engine compartment covers
→ P. 4 3 8
■ 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
HS250h_U_75050U
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 immediat ely 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 shown 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
HS250h_U_75050UCheck that the coolant level of the
power control unit is between the
“FULL” and “LOW” lines of the
reservoir tank.
“FULL” line
“LOW” line
If the coolant level of the power
control unit is insufficient, add
more coolant.
If power control unit coolant is
unavailable, water can be used as
an emergency substitute.
Restart the hybrid system (depress and hold the brake pedal, and
press the “POWER” switch once). Check that the “HYBRID
SYSTEM OVERHEAT” message has gone off.
If the warning message remains on, stop the hybrid system and
contact your Lexus dealer.
Have the vehicle inspected at the nearest Lexus dealer as soon as possi-
ble.
■Overheating
The following symptoms may occur when your vehicle is overheating:
●The high engine coolant temperature warning 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
HS250h_U_75050U
Compartment ......................................437
Engine switch ........................................ 152
Hood ....................................................... 434
How to start the engine.................... 152
How to start the hybrid system.................................................... 152
Identification number.......................560
If the engine will not start ................. 541
If the hybrid system will not start.......................................................... 541
Ignition switch........................................ 152
Overheating......................................... 552
Power switch ......................................... 152
Engine compartment cover............. 438
Engine coolant Capacity................................................. 564
Checking ................................................442
Preparing and checking
before winter.................................... 258
Engine/power control unit coolant
Capacity................................................. 564
Checking ................................................442
Preparing and checking before winter.................................... 258
Engine immobilizer system ................. 101
Engine oil Capacity................................................. 563
Checking ............................................... 439
Preparing and checking before winter.................................... 258
Engine switch ........................................... 152
Enhanced VSC ..................................... 238
EPS............................................................. 238
EV drive mode switch .......................... 157
Event data recorder ............................... 20 Floor mat .................................................. 394
Fluid
Brake ....................................................... 566
Washer ...................................................446
Fog lights Replacing light bulbs ......................... 481
Switch.......................................................202
Wattage................................................. 568
Foot light................................................... 374
Foot well lighting ................................... 374
Front fog lights Replacing light bulbs ......................... 481
Switch.......................................................202
Wattage................................................. 568
Front passenger occupant classification system ............................ 121
Front passenger's seat belt reminder light..................................... 505
Front seats Adjustment ...............................................68
Driver’s seat position memory ....... 72
Front side marker light
Replacing light bulbs ......................... 481
Wattage................................................. 568
Front turn signal lights Replacing light bulbs ......................... 481
Switch........................................................ 166
Wattage................................................. 568
Fuel Capacity .................................................562
Fuel gauge.............................................. 169
Gas station information ................. 628
Information ........................................... 569
Refueling.................................................... 97
Type ......................................................... 569
*: For vehicles with a navigation system, refer to “Navigation System Owner’s Manual”.
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