2011 Lexus IS250 power steering

5
When trouble arises
465
5-2. Steps to take in an emergency
IS350/250_U
■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 caused 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 with 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.

5
When trouble arises
467
5-2. Steps to take in an emergency
IS350/250_U
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 tire. 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.

506
5-2. Steps to take in an emergency
IS350/250_U
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 pedal 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 vehicle 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

533
6-1. Specifications
6
Vehicle specifications
IS350/250_U■
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 Motor 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 excessive 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 equipped, air conditioning and
additional weight optional engine

562
IS350/250_U
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
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
TRACTr a c t i o n C o n t r o l
VDIMVehicle Dynamics Integrated Management

566
Alphabetical index
IS350/250_U
Cruise control ......................................... 175
Cup holder .............................................. 322
Curtain shield airbags............................ 93
Customizable features ...................... 540
Daytime running light system ........... 166
DefoggerRear window.......................................... 214
Side mirror .............................................. 214
Dimension ............................................... 508
Dinghy towing ............................. 200, 201
Display
Satellite switch mode ....................... 329
Trip information ..................................... 161
Warning message............................. 470
Do-it-yourself maintenance ............ 380
Door courtesy lights Door courtesy lights...........................315
Wattage.................................................. 524
Door pockets..........................................324
Doors Door lock................................ 28, 40, 43
Door windows ....................................... 75
Side mirrors ..............................................72
Driver's seat belt reminder light ..... 463
Driving Correct posture ...................................... 91
Procedures ............................................. 124
Driving position memory ......................53 Electric power steering....................... 185
Electronic key
If the electronic key does not operate properly............................ 493
Emergency, in case of If the engine will not start ............... 489
If the shift lever cannot be shifted from P..................................... 491
If the vehicle has a discharged battery ................................................. 498
If the warning buzzer sounds........ 461
If the warning light turns on............ 461
If a warning message is displayed ............................................ 470
If you have a flat tire .......................... 481
If you lose your keys .........................492
If you think something is wrong ...................................................457
If the electronic key does not operate properly............................ 493
If your vehicle becomes stuck .... 504
If your vehicle has to be stopped in an emergency ............................506
If your vehicle needs to be
towed ..................................................... 451
If your vehicle overheats..................501
Emergency flashers Switch...................................................... 450
Engine Compartment ..................................... 386
Engine switch ........................................ 134
Hood ....................................................... 383
How to start the engine ................... 134
Identification number ...................... 509
If the engine will not start ............... 489
Ignition switch ....................................... 134
Overheating ..........................................501
D
E

571
Alphabetical index
IS350/250_U
Shift leverAutomatic transmission.................... 139
If the shift lever cannot be shifted from P ..................................... 491
Manual transmission ..........................145
Shift lever lights ....................................... 315
Shift lock system ..................................... 491
Shopping bag hooks ............................ 347
Side airbags ................................................93
Side marker lights
Switch ........................................................165
Side mirror
Adjusting and folding .......................... 72
Mirror position memory ................... 53
“SOS” button ......................................... 360
Smart access system with push-button startEntry function ......................................... 28
Starting the engine.............................. 134
Spare tire
Inflation pressure ................................. 412
Storage location...................................481
Spark plug .................................................515
Specifications......................................... 508
Speedometer Speed indicator ......................................151
Speedometer ..........................................151 Steering wheel
Audio switches ....................................263
Manual adjustment............................... 67
Power adjustment.................................68
Steering wheel positionmemory .................................................. 53
Storage feature....................................... 319
Stuck If your vehicle becomes stuck .... 504
Sun visors ................................................. 326
Sunshade Rear........................................................... 342
Roof.............................................................. 79
Switch
ECT switch............................................. 140
Emergency flasher switch ............ 450
Engine switch ........................................ 134
ETCS switch .......................................... 146
Fog light switch .................................... 168
Hazard light switch .......................... 450
Ignition switch ....................................... 134
Light switches ....................................... 165
Power door lock switch .................... 43
Power window switch ........................ 75
Satellite switches.................................329
Transmission shift switches .............142
Window lock switch............................ 75
Wiper and washer switch............... 169

573
Alphabetical index
IS350/250_U
Warning buzzersBrake system ......................................... 461
Open door .......................................... 463
Seat belt reminder ............................ 463
Warning lights Anti-lock brake system .................. 462
Brake assist system .......................... 462
Brake system ......................................... 461
Charging system ............................... 462
Electric power steering
warning light ..................................... 462
Low fuel level....................................... 463
Malfunction indicator lamp .......... 462
Master warning light ........................ 463
Open door ........................................... 463
Pretensioners ...................................... 462
Seat belt reminder light .................. 463
SRS airbags .......................................... 462
Tire pressure warning light........................................................ 463
Warning messages AWD system ......................................... 471
Engine oil level .....................................473
Engine oil maintenance...................473
Engine oil pressure........................... 470
Hood ........................................................473
Intuitive parking assist ........... 471, 473
Moon roof..............................................473
Open door ............................................473
Parking brake .......................................473 Smart access system with
push-button start ............................ 477
Steering lock........................................... 471
Tire pressure warning system...................... 471, 473
Trunk ........................................................ 473
Washer fluid ......................................... 473
Washer
Checking .............................................. 399
Preparing and checking before winter ..................................... 195
Switch........................................................ 169
Washing and waxing ...........................368
Weight Cargo capacity ...................................... 191
Load limits .............................................. 194
Weight.................................................... 508
Wheels ....................................................... 416
Window glasses ...................................... 75
Window lock switch ............................... 75
Windows Power windows ..................................... 75
Rear window defogger.....................214
Washer .................................................... 169
Windshield wipers................................. 169
Windshield wiper de-icer................... 215
Wireless remote control key Replacing the battery.........................421
WMA disc ............................................... 234W