2012 Lexus IS250 power steering

5
When trouble arises
473
5-2. Steps to take in an emergency
Follow the correction procedures.After taking the specified steps to co rrect the suspected problem, check
that the warning light turns off.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
ABS warning light
Indicates a malfunction in:
•The ABS;
• The brake assist system.
Electric power steering system warning lightIndicates a malfunction in the EPS (Electric Power Steering)
system.
Slip indicatorIndicates a malfunction in:
• The VSC system;
•The TRAC system; or
• The hill-start assist control system
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that a door or the
trunk is not fully closed.
Check that all doors and the
trunk are closed.
Low fuel level warning lightRemaining fuel
(Approximately 2.9 gal. [11 L,
2.4 Imp. gal.] or less)
Refuel the vehicle.
(On the instru-ment cluster)
Driver’s seat belt reminder
light (warning buzzer)
*2
Warns the driver to fasten
his/her seat belt.Fasten the seat belt.

476
5-2. Steps to take in an emergency
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The lamp will go off after taking several driving trips.
If the lamp does not go off even after several trips, contact your Lexus dealer as
soon as possible.
■Electric power steering warning light
When the battery is low or when the voltage drops temporarily, the electric power
steering warning light may come on.
■Front passenger detection sensor and pass enger seat belt reminder and warning
buzzer
●If luggage is placed on the front passenger seat, the front passenger detection
sensor may cause the warning light to flash and the warning buzzer to sound,
even if a passenger is not sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pressing the
satellite switch does not turn off the tire pressure warning light.
■The tire pressure warning light may turn on due to natural causes
The tire pressure warning light may turn on due to natural causes such as natural air
leaks or tire inflation pressure changes caus ed by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped wi th the tire pressure warning valve and
transmitter. If a tire goes flat, the tire pressure warning light will not turn off even
though the flat tire is replaced with the spare tire. Replace the spare tire with the
repaired tire and adjust the proper tire inflation pressure. The tire pressure warning
light will turn off after a few minutes.

478
5-2. Steps to take in an emergency
CAUTION
■When the electric power steering warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, firmly hold and
operate it using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat ti re. Check the tires. If the tire is flat,
change to the spare tire and have the flat tire repaired by the nearest Lexus
dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

518
5-2. Steps to take in an emergency
If your vehicle has to be stopped in an emergency
CAUTION
■If the engine has to be turned off while driving
Power assist for the brakes and steering wheel will be lost, making the brake pedal
harder to depress and the steering wheel heavier to turn. Decelerate as much as
possible before turning off the engine.
Only in an emergency, such as if it becomes impossible to stop the vehicle
in the normal way, stop the vehicle using the following procedure:
Steadily step on the brake pe dal with both feet and firmly
depress it.
Do not pump the brake pedal repeatedly as this will increase the
effort required to slow the vehicle.
Shift the shift lever to N.
If the shift lever is shifted to N After slowing down, stop the vehicl e in a safe place by the road.
Stop the engine.
If the shift lever cannot be shifted to N Keep depressing the brake pedal with both feet to reduce vehi-
cle speed as much as possible.
Stop the engine by pressing and
holding the “ENGINE START
STOP” switch for 3 consecutive
seconds or more.
Stop the vehicle in a safe place by the road.
STEP1
STEP2
STEP3
STEP4
STEP3
Press and hold for 3 seconds or more
STEP4
STEP5

546
6-1. Specifications
■Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing
the tire's resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail-
ure.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Mo tor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excess ive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipp ed, air conditioning and
additional weight optional engine

576
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
2WDTwo Wheel Drive
ABSAnti-lock Brake System
AI-SHIFTArtificial Intelligence Shift
ALRAutomatic Locking Retractor
AW DAll Wheel Drive
CRSChild Restraint System
DISPDisplay
ECTElectronic Controlled Transmission
ECUElectronic Control Unit
EDREvent data recorder
ELREmergency Locking Retractor
EPSElectric Power Steering
ETCSElectronic Throttle Control System
GAWRGross Axle Weight Rating
I/MEmission inspection and maintenance
LATCHLower Anchors and Tethers for Children
LEDLight Emitting Diode
MMTMethylcyclopentadienyl Manganese Tricarbonyl
M + SMud and Snow
MTBEMethyl Tertiary Butyl Ether
OBDOn Board Diagnostics
SRSSupplemental Restraint System
TINTire Identification Number
TPMSTire Pressure Warning System
TRACTraction Control

580
Alphabetical index
Child-protectors ...................................... 49
Cigarette lighter....................................343
CleaningExterior ................................................... 378
Interior ..................................................... 382
Seat belts................................................383
Clock ........................................................ 338
Coat hooks ..............................................355
Compass ..................................................366
Condenser ..............................................406
Console box .......................................... 330
Cooling system Engine overheating ............................513
Cornering assist sensors .................... 190
Cruise control ......................................... 186
Cup holder ..............................................332
Curtain shield airbags............................98
Customizable features .......................553
Daytime running light system ............174
Defogger* Rear window ........................................ 224
Side mirror ............................................ 224
Dimension ................................................520
Dinghy towing ................................. 211, 212
Display Satellite switch mode ....................... 339
Trip information ................................... 168
Warning message.............................. 481 Do-it-yourself maintenance ...............391
Door courtesy lights
Door courtesy lights ........................ 325
Wattage ................................................. 536
Door pockets ......................................... 334
Doors Door lock ................................33, 45, 48
Door windows ....................................... 80
Side mirrors.............................................. 77
Driver's seat belt reminder light ..... 473
Driving Correct posture.....................................96
Procedures............................................. 130
Driving position memory...................... 58
Electric power steering........................196
Electronic key If the electronic key does not operate properly............................505
Emergency, in case of If a warning message is displayed .............................................. 481
If the electronic key does not
operate properly............................505
If the engine will not start .................501
If the shift lever cannot be shifted from P................................... 503
If the vehicle has a discharged battery ...................................................510
If the warning buzzer sounds........ 471
If the warning light turns on............ 471
D
E

586
Alphabetical index
Smart access system with push-button startEntry function.......................................... 33
Starting the engine ................................141
Spare tire Inflation pressure................................ 424
Storage location ................................. 492
Spark plug ................................................ 527
Specifications .........................................520
Speedometer Speed indicator ................................... 158
Speedometer........................................ 158
Steering wheel Audio switches* ................................. 273
Manual adjustment ............................... 72
Power adjustment .................................73
Steering wheel positionmemory.................................................. 58
Storage feature......................................329
Stuck If your vehicle becomes stuck...... 516
Sun visors .................................................336
Sunshade Rear .......................................................... 352
Roof ............................................................. 84 Switch
ECT switch ............................................. 147
Emergency flasher switch..............462
Engine switch .......................................... 141
ETCS switch .......................................... 153
Fog light switch .................................... 176
Hazard light switch ...........................462
Ignition switch ......................................... 141
Light switches.........................................172
Power door lock switch.................... 48
Power window switch ....................... 80
Satellite switches................................ 339
Transmission shift switches ............ 149
Window lock switch ........................... 80
Wiper and washer switch ............... 178
Tachometer Tacho indicator ....................................158
Tachometer............................................158
Tail lights Switch .........................................................172
Talk switch* ............................................. 299
Telephone switch* ............................... 298
Theft deterrent system Alarm........................................................... 92
Engine immobilizer system ............. 90
Theft prevention labels.......................... 95
Tire inflation pressure ......................... 424
T