2012 Lexus IS250 run flat

1
2
3
4
5
6
7
5
IS350/250_U
3-6. Using the storage featuresList of storage features............... 329
• Glove box ................................... 330
• Console boxes .......................... 330
• Overhead console ................... 332
• Cup holders................................. 332
•Bottle holders/door pockets ............................... 334
• Auxiliary box .............................. 335
3-7. Other interior features Sun visors......................................... 336
Vanity mirrors................................ 337
Clock ................................................ 338
Satellite switches .......................... 339
Ashtrays ........................................... 342
Cigarette lighter ........................... 343
Power outlet ................................... 344
Seat heaters.................................... 345
Seat heaters and ventilators .................................... 348
Armrest ............................................. 351
Rear sunshade ............................... 352
Trunk storage extension ........... 354
Coat hooks .................................... 355
Floor mat.......................................... 356
Trunk features................................ 357
Garage door opener................. 360
Compass.......................................... 366
Safety Connect ............................. 370 4-1. Maintenance and care
Cleaning and protecting the vehicle exterior................... 378
Cleaning and protecting the vehicle interior .................... 382
4-2. Maintenance Maintenance requirements.............................. 385
General maintenance ................ 387
Emission inspection and maintenance (I/M)
programs ..................................... 390
4-3. Do-it-yourself maintenance Do-it-yourself service precautions ................................... 391
Hood ................................................. 394
Positioning a floor jack............... 395
Engine compartment.................. 397
Tires .................................................... 412
Tire inflation pressure................. 424
Wheels ............................................. 428
Air conditioning filter................. 430
Electronic key battery ................ 433
Checking and replacing fuses ................................................ 435
Headlight aim ................................ 449
Light bulbs........................................ 451
4Maintenance and care

IS350/250_U
9
Tires
●Rotation
● Replacement
● Inflation pressure
● Information
P. 412
P. 492
P. 531
P. 541
Tail lights P. 172
Side marker lights P. 172
Trunk P. 52
Rear window defogger *1P. 224
Doors P. 48
Fuel filler door P. 87
Turn signal lights P. 154
∗: If equipped
*1: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

389
4-2. Maintenance
4
Maintenance and care
IS350/250_U
Vehicle exterior
Steering wheel
• Moves smoothly?
• Has correct free play?
• No strange noises?
ItemsCheck points
Door/trunk• Operates smoothly?
Engine hood• The lock system works properly?
Fluid leaks• Is there any leakage after parking?
Ti r e
• Inflation pressure is correct?
• Tire surfaces not worn or dam-aged?
• Tires rotated according to the maintenance schedule?
• Wheel nuts are not loose?
CAUTION
■If the engine is running
Turn the engine off and ensure that there is adequate ventilation before performing
maintenance checks.
ItemsCheck points

5
When trouble arises
463
5-1. Essential information
IS350/250_U
If your vehicle needs to be towed
Before towingThe following may indicate a problem with your transmission. Contact
your Lexus dealer before towing.
● The engine is running, but the vehicle will not move.
● The vehicle makes an abnormal sound.
Emergency towing
If a tow truck is not available, in an emergency your vehicle may be tem-
porarily towed using a cable or chain secured to the emergency towing
eyelet(s). This should only be attempted on hard, surfaced roads for short
distances at low speeds.
A driver must be in the vehicle to steer and operate the brakes. The vehi-
cle’s wheels, drive train, axles, steering and brakes must be in good condi-
tion. Towing eyelets
If towing is necessary, we recommend having your vehicle towed by your
Lexus dealer or a commercial towing se rvice, using a lift-type truck or a flat
bed truck.
Use a safety chain system for all towing, and abide by all state/provincial
and local laws.
If towing from the rear, the vehicle’s front wheels and axles must be in good
condition. ( →P. 4 6 7 )
If they are damaged, use a towing dolly or flat bed truck.

5
When trouble arises
469
5-1. Essential information
IS350/250_U
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points
higher than normal
■ Audible symptoms
●Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
●Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

5
When trouble arises
497
5-2. Steps to take in an emergency
IS350/250_U
■When using the compact spare tire
As the compact spare tire is not equipped with the tire pressure warning valve and
transmitter, low inflation pressure of the spare tire will not be indicated. Also, if you
replace the compact spare tire after the tire pressure warning light comes on, the
light remains on.
■If you have a flat rear tire on a road covered with snow or ice
Install the compact spare tire on the front of the vehicle. Perform the following steps
and fit tire chains to the rear tires.Replace a front tire with the compact spare tire.
Replace the flat rear tire with the tire removed from the front of the vehi-
cle.
Fit tire chains to the rear tires.
■After completing the tire change
The tire pressure warning system must be reset. ( →P. 4 1 4 )
CAUTION
■Using the tire jack
Improper use of the tire jack may lead to death or serious injuries due to the vehicle
suddenly falling off the jack.
●Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do not use other tire jacks for replacing tires
on this vehicle.
●Always check that the tire jack is securely set to the jack point.
●Do not put any part of your body under the vehicle while it is supported by a jack.
●Do not start or run the engine while your vehicle is supported by the jack.
●Do not raise the vehicle while someone is in it.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greater than that required to replace the tire.
STEP1
STEP2
STEP3

587
Alphabetical index
IS350/250_U
Tire informationGlossary ................................................ 546
Size ........................................................... 543
Tire identification number ............. 543
Uniform tire quality grading......... 544
Tires
Chains ..................................................... 206
Checking ................................................. 412
If you have a flat tire.......................... 492
Inflation pressure ................................424
Inflation pressure sensor.................. 414
Information..............................................541
Replacing............................................... 492
Rotating tires .......................................... 412
Size ............................................................. 531
Snow tires.............................................. 206
Tools ...........................................................492
Total load capacity............................... 205
Towing Dinghy towing............................... 211, 212
Emergency towing ........................... 463
Trailer towing......................................... 210
TRAC .......................................................... 196
Traction control ...................................... 196
Transmission shift switches ................ 149
Trip meter..................................................158 Trunk
Extending trunk space ....................354
Opener ...................................................... 52
Trunk light
Trunk light ................................................. 53
Wattage ................................................. 536
Turn signal lights Replacing light bulbs ......................... 451
Switch........................................................ 154
Wattage ................................................. 536
USB port* .................................................... 260
Vanity lights Vanity lights .......................................... 337
Wattage ................................................. 536
Vanity mirrors ........................................ 337
VDIM .......................................................... 196
Vehicle dynamics integrated management ........................................ 196
Vehicle identification number .......... 521
Vehicle stability control....................... 196
Ventilators ...............................................348
Voice command switch* ...................298
VSC............................................................. 196
U
V
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

590
IS350/250_U
What to do if...
What to do if...
A tire puncturesP. 4 9 2If you have a flat tire
The engine does not start
P. 5 0 1If the engine will not start
P. 9 0Engine immobilizer system
P. 5 1 0If the vehicle battery is discharged
The shift lever cannot be
moved out of PP. 5 0 3If the shift lever cannot be shifted
from P
The engine coolant temperature
gauge enters the red zone
Steam can be seen coming
from under the hood
P. 5 1 3If your vehicle overheats
The key is lostP. 5 0 4If you lose your keys
The battery runs outP. 5 1 0If the vehicle battery is discharged
The doors cannot be lockedP. 4 8Doors
The horn begins to soundP. 9 2Alarm
The vehicle is stuck in mud or
sandP. 5 1 6If the vehicle becomes stuck