check engine Lexus HS250h 2010 Using the Bluetooth audio system / LEXUS 2010 HS250H (OM75006U) Owner's Manual

5
When trouble arises
507
5-2. Steps to take in an emergency
(U.S.A. only)
Indicates that the engine
oil should be changedComes on approxi-
mately 5000 miles
(8000 km) after the
engine oil is changed
(and the oil maintenance
data has been reset)
Check and change the
engine oil.
Indicates that the tire
inflation pressure is lowCheck the tire inflation
pressure, and adjust to the
appropriate level.
(If equipped)
Indicates that the pre-
collision system is not
currently functional
because the grille or the
sensor is dirty.
This message also
appears when the pre-
collision system is not
functional due to over-
heating.
Check the grille and the
sensor and clean them if
they are dirty.In case of overheating,
the system will become
functional once the sys-
tem cools down.
(If equipped)
Indicates that intuitive
parking assist sensor is
dirty or covered with ice
A buzzer also sounds.
The site of the malfunc-
tion and the vehicle
image are flashing.
Clean the sensor.
Wa r n i n g m e s s a g eDetailsCorrection procedure

5
When trouble arises
541
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 an d turn of
f the air conditioning
system.
Check to see if steam is coming out from the engine area.
If you see steam: 
Stop the hybrid system. Carefu lly lif
t 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.
Remove the engine compartment cover. ( P. 4 2 3 )
Check to see if the cooling fans are operating.
If the fans are operating: 
Wait until the high engine coolant temperature warning light goes
of
f 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 S
YSTEM OVERHEAT” is sh own on the multi-information
display: 
The power control unit may be overheating.
Follow the correction procedure as described below.

542
5-2. Steps to take in an emergency
After the hybrid system has cooled
down sufficiently, check the engine
coolant level and inspect the cool-
ing system for leaks.
Add engine coolant if necessary.
Water can be used in an emer -
gency if engine coolant is unavail -
able. ( P. 5 5 2 )
Have the vehicle inspected at the ne arest Lexus dealer as soon as possi-
ble.
■ If “HYBRID S
YSTEM OVERHEAT” is shown on the multi-informa -
tion display
Stop the vehicle in a safe place an d turn of
f the air conditioning
system.
Leave the hybrid system operating and carefully lift the hood.
Remove the engine compartment covers. ( P. 4 2 3 )
Check if the cooling fans are operating.
If the fans are operating: 
Wait until the “HYBRID SYST EM O
VERHEAT” message disap-
pears and then stop the hybrid system. 
If the message does not disappear, call your Lexus dealer.
If the fans are not operating: 
Stop the hybrid system immediately and call your Lexus dealer.

5
When trouble arises
543
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.
Add power control unit coolant if
nec
essary.
Water can be used in an emer -
gency if power control unit coolant
is una
vailable. ( P. 5 5 2 )
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.

544
5-2. Steps to take in an emergency
CAUTION
■To prevent an accident or injury when inspecting under the hood of your vehicle
●If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartm ent may be very hot, causing serious
injuries such as burns.
●Check that the indicator on the “POWER ” switch and the READY indicator are
off.
●For vehicles with a hybrid system, there are times when the gasoline engine auto-
matically starts to run or the cooling fans suddenly start to operate. Do not touch
or approach the rotating parts of the belt or fans. Doing so may lead to fingers,
clothes or tools getting caught, resulting in injury.
●Do not loosen the coolant reservoir cap while the hybrid system and radiator are
hot. 
Serious injuries, such as burns, may resu lt from hot coolant and steam released
under pressure.
NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power control
unit coolant. 
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid system too
quickly can cause damage to the hybrid system.

595
Alphabetical index
Electric power steering ......................225
Electronic keyIf the electronic key does not 
operate properly ............................ 533
Emergency, in case of If the electronic key does not 
operate properly ............................ 533
If the engine will not start ...............530
If the hybrid system will not 
start........................................................530
If the 12-volt battery is 
discharged ........................................ 536
If the warning buzzer sounds...... 492
If the warning light turns on .......... 492
If the warning message is 
displayed ............................................. 501
If you have a flat tire .......................... 521
If you lose your keys ........................ 532
If you think something is 
wrong................................................... 489
If your electronic key does 
not operate properly.................... 533
If your vehicle becomes stuck .... 545
If your vehicle needs to be  towed ................................................... 483
If your vehicle overheats.................. 541
Emergency flasher Switch ...................................................... 482 Engine
Accessory mode................................. 148
Compartment...................................... 422
Engine switch .........................................147
Hood ......................................................... 419
How to start the engine ....................147
How to start the hybrid 
system ....................................................147
Identification number ...................... 548
If the engine will not start............... 530
If the hybrid system will not 
start ....................................................... 530
Ignition switch ........................................147
Overheating .......................................... 541
Power switch..........................................147
Engine compartment cover ............. 423
Engine coolant Capacity .................................................552
Checking ...............................................428
Preparing and checking before winter .................................... 244
Engine/power control unit coolant Capacity .................................................552
Checking ...............................................428
Preparing and checking before winter .................................... 244
Engine immobilizer system.................. 96E

596
Alphabetical index
Engine oilCapacity ................................................ 550
Checking ............................................... 424
Preparing and checking 
before winter .................................... 244
Engine oil maintenance data............ 426
Engine switch............................................147
Enhanced VSC...................................... 225
EPS ............................................................. 225
EV drive mode switch .......................... 152
Event data recorder ............................490
Floor mat ................................................. 380
Fluid Brake........................................................554
Washer ................................................... 432
Fog lights Replacing light bulbs........................ 469
Switch ........................................................194
Wattage..................................................556
Foot light ...................................................360
Foot well lighting ...................................360
Front fog lights
Replacing light bulbs........................ 469
Switch ........................................................194
Wattage..................................................556
Front passenger occupant 
classification system ............................115
Front passenger's seat belt 
reminder light......................................495 Front seats
Adjustment ...............................................64
Driver’s seat po sition memory ...... 68
Front side marker light Replacing light bulbs ....................... 469
Wattage ................................................. 556
Front turn signal lights Replacing light bulbs ....................... 469
Switch ........................................................ 162
Wattage ................................................. 556
Fuel Capacity ................................................550
Fuel gauge .............................................. 162
Gas station information .................608
Information ........................................... 557
Refueling .................................................... 92
Type ......................................................... 557
Fuel door ..................................................... 92
Fuel filler door ........................................... 92
Fuses .......................................................... 455
Garage door opener .......................... 383
Gas station information .....................608
Gauges .......................................................162
Glove box ................................................ 364
Grocery bag hooks .............................. 381
F
G

601
Alphabetical index
Steering wheelAdjustment ...............................................79
Audio switches ...................................308
Manual adjustment ...............................79
Power adjustment .................................79
Steering wheel position 
memory ................................................. 68
Stop light Replacing light bulbs ....................... 479
Wattage ................................................. 556
Storage feature ..................................... 363
Stuck If the vehicle becomes stuck ....... 545
Sun visors................................................... 371
Sunshade Rear .......................................................... 378
Roof ............................................................. 89
Switch Driving mode selector 
switch .................................................... 158
Engine switch ........................................ 147
Fog light switch..................................... 194
Ignition switch........................................ 147
Light switches........................................183
Mode select switch ........................... 158
Power door lock switch .....................57
Power switch ......................................... 147
Power window switch........................ 86
Tire pressure warning reset 
switch ................................................... 439
Window lock switch ........................... 86
Wiper and washer ..............................195 Tail lights
Replacing light bulbs ........................ 479
Switch........................................................ 183
Wattage ................................................. 556
Talk switch .....................................314, 333
Telephone switch ..................................333
Theft deterrent system Alarm...........................................................98
Immobilizer system ..............................96
Theft prevention labels ........................ 100
Tire inflation pressure ......................... 445
Tire information Glossary ................................................ 566
Size ........................................................... 563
Tire identification number..............562
Uniform Tire Quality Grading ... 564
Tires Chains .....................................................245
Checking ............................................... 437
Compact spare tire ........................... 521
If you have a flat tire ........................... 521
Inflation pressure ................................445
Inflation pressure sensor ............... 438
Information ........................................... 560
Replacing ................................................ 521
Rotating tires ........................................ 437
Size ........................................................... 555
Snow tires .............................................. 244
Spare tire ................................................. 521
Tire pressure warning 
system ......................................437, 495
Tools ............................................................ 521
Total load capacity ............................... 243T

603
Alphabetical index
Warning messagesCruise control ..................................... 502
Dynamic radar cruise 
control .................................... 502, 505
Electric power steering  system.................................................. 502
Engine oil maintenance..................505
Engine oil pressure............................ 501
EV drive mode ...................................505
Headlight ............................................... 502
Hood .......................................................505
Hybrid system ...................................... 501
Intuitive parking assist ........ 502, 505
Key .............................................................. 513
Lane-Keeping Assist .......................505
Moon roof .............................................505
Open door ...........................................505
Parking brake ......................................505
Pre-collision system ............ 502, 505
Smart access system with 
push start.............................................. 513
Tire pressure warning 
system..................................................505
Trunk ........................................................505
Washer fluid.........................................505 Washer
Checking ............................................... 432
Preparing and checking before winter .................................... 244
Switch........................................................ 195
Washing and waxing ...........................402
Weight Cargo capacity ................................... 243
Load limits ............................................. 243
Weight.................................................... 548
Wheels ......................................................448
Window glasses .......................................86
Window lock switch ...............................86
Windows Power windows .....................................86
Rear window defogger.................. 260
Washer .................................................... 195
Windshield wiper de-icer................... 261
Windshield wipers................................. 195
Wireless remote control key Locking/Unlocking ............................. 54
Replacing the battery.......................453
Wireless remote control key .......... 54
WMA disc ................................................ 281