2008 Lexus IS250 check engine

388
5-2. Steps to take in an emergency
CAUTION
■Using the tire jack
Improper use of the tire jack may lead to death or injuries due to the vehicle sud-
denly 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 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 greate r than that required to replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured.
■Replacing a flat tire
Observe the following precautions to reduce the risk of death or serious injury.
●Never use oil or grease on the wheel bolts or wheel nuts.
The oil or grease can cause the wheel nuts to loosen, causing a serious accident.
Remove any oil or grease on the wheel bolts or wheel nuts.
●Have the wheel nuts tightened with a torque wrench to 76 ft•lbf (103 N•m, 10.5
kgf•m) as soon as possible after changing wheels.
Failure to follow these precautions could cause the nuts to loosen and the wheels
may fall off, which could lead to an accident causing death or serious injury.

398
5-2. Steps to take in an emergency
■Avoiding a discharged battery
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic, etc.
■When the battery is removed or discharged
The power windows must be initialized.
( P. 6 4 )
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable
gas that may be emitted from the battery.
●Make sure the jumper cable is connected to the correct terminal and that it is not
unintentionally in contact with any pa rt other than the intended terminal.
●Do not allow the jumper cables to come into contact with the “+” and “-” termi-
nals.
●Do not allow open flame or use matches, cigarette lighters or smoke near the
battery.
Maintain the engine speed on th e second vehicle and turn the
“ENGINE START STOP” switch to IGNITION ON mode,
then start the vehicle’s engine.
Once the vehicle’s engine ha s started, remove the jumper
cables in the exact reverse ord er in which they were con-
nected.
Once the engine starts, have the ve hicle checked at your Lexus dealer
as soon as possible.STEP5
STEP6

400
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the automatic air
conditioning system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the engine and car efully lift the hood.
If you do not see steam: Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. ( P. 2 9 4 )
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the engine.
If the fan is not operating: Stop the engine immediately and call your local Lexus
dealer.
After the engine has cooled
down sufficiently, check the
engine coolant level and inspect
the radiator core (radiator) for
any leaks.STEP1
STEP2
STEP3
STEP4
STEP5

5
When trouble arises
401
5-2. Steps to take in an emergency
■Overheating
If you observe the following, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●Steam is coming from under the hood.
CAUTION
■To prevent an accident or injury when in specting under the hood of your vehicle
●Keep hands and clothing away from the fan and other belts while the engine is
running.
●Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam released
under pressure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled do wn before adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too quickly
can cause damage to the engine.
Add engine coolant if required.
Water can be used in an emer-
gency measure if engine coolant
is unavailable. ( P. 411)
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

412
6-1. Specifications
Electrical system
Differential
*: “Toyota Genuine Differential gear oil LT” is filled in your Lexus vehicle at fac-tory fill. Use Lexus approved “Toyota Genuine Differential gear oil LT” or an
equivalent of matching quality to satisf y the above specification. Please contact
your Lexus dealer for further details.
Battery
Open voltage* at
68 F (20 C):12.6 12.8 V Fully charged
12.2 
12.4 V Half charged
11.8 
12.0 V Discharged
(*: Voltage checked 20 minutes after
the engine and all the lights are turned
off)
Charging rates5 A max.
Oil capacity
Front0.74 qt. (0.70 L, 0.61 lmp.qt.)
Rear
IS350:
1.42 qt. (1.35 L, 1.19 lmp.qt.)
IS250 (2WD models): 1.20 qt. (1.15 L, 1.01 lmp.qt.)
IS250 (AWD models): 1.10 qt. (1.05 L, 0.92 lmp.qt.)
Oil type and
viscosity*
IS250 (AWD)
Hypoid gear oil API GL-5 Above 0 F (-18 C): SAE90
Below 0 F (-18 C): SAE80W
or SAE80W-90
Others
“Toyota Genuine Differential
Gear Oil LT 75W-85 GL-5” or
equivalent

453
Alphabetical index
Electric power steering ....................... 170
Electronic keyIf the electronic key does not operate properly ............................ 394
Emergency, in case of If the engine will not start ................. 391
If the shift lever cannot be shifted from P ................................... 392
If the vehicle has discharged battery.................................................. 397
If the warning buzzer sounds...... 360
If the warning light turns on .......... 360
If the warning message is displayed ............................................ 369
If you have a flat tire ........................ 382
If you lose your keys ........................ 393
If you think something is wrong................................................... 356
If the electronic key does not operate properly ............................ 394
If your vehicle becomes stuck .... 402
If your vehicle needs to be towed ...................................................350
If your vehicle overheats................400 Engine
Compartment...................................... 292
Engine switch .......................................... 117
Hood ....................................................... 289
How to start the engine ..................... 117
Identification number .......................407
If the engine will not start................. 391
Ignition switch ......................................... 117
Overheating ........................................ 400
Engine compartment cover ............. 294
Engine coolant Capacity .................................................... 411
Checking ...............................................299
Preparing and checking before winter ..................................... 183
Engine coolant temperature gauge....................................................... 130
Engine immobilizer system.................. 72
Engine oil Capacity .................................................. 410
Checking ...............................................295
Preparing and checking before winter ..................................... 183
Engine oil maintenance data............298
EPS .............................................................. 170
Event data recorder ........................... 358E

459
Alphabetical index
TachometerTacho indicator ....................................130
Tachometer ............................................130
Tail lights Switch ........................................................ 143
Talk switch*
Telephone switch*
Theft deterrent system Alarm ........................................................... 74
Engine immobilizer system .............. 72
Theft prevention labels .......................... 76
Tire inflation pressure........................... 316
Tire information Glossary ................................................ 429
Size ........................................................... 426
Tire identification number ............. 426
Uniform tire quality grading..........427
Tires Chains .......................................................183
Checking ............................................... 306
If you have a flat tire.......................... 382
Inflation pressure ................................. 316
Inflation pressure sensor................308
Information.............................................424
Replacing............................................... 382
Rotating tires ........................................ 306
Size ............................................................. 415
Snow tires................................................183
Tools .......................................................... 382
Total load capacity................................. 182 Towing
Dinghy towing ........................... 188, 189
Emergency towing........................... 350
Trailer towing ........................................ 187
TRAC.......................................................... 170
Traction control ...................................... 170
Transmission shift switches ................ 124
Trip meter ................................................. 130
Trunk Extending a space ............................ 258
Opener ........................................................ 41
Trunk light Trunk light ................................................. 42
Wattage ..................................................420
Turn signal lights Replacing light bulbs ........................ 342
Switch........................................................ 128
Wattage ..................................................420T
*: Refer to the “Navigatio n System Owner’s Manual”

460
Alphabetical index
Vanity lightsVanity lights .......................................... 243
Wattage.................................................. 420
Vanity mirrors ........................................ 243
VDIM .......................................................... 170
Vehicle dynamics integrated management ........................................ 170
Vehicle identification number ......... 407
Vehicle stability control....................... 170
Ventilators ...............................................253
VSC ............................................................. 170
Warning buzzers Brake system .......................................360
Open door .......................................... 362
Seat belt reminder............................. 362
Warning lights Anti-lock brake system.....................361
Brake assist system.............................361
Brake system .......................................360
Charging system .................................361
Electric power steering warning light .......................................361
Low fuel level ....................................... 362
Malfunction indicator lamp.............361
Master warning light ........................ 362
Open door ........................................... 362
Pre-collision system ...........................361
Pretensioners.........................................361
Seat belt reminder light .................. 362
SRS airbags ............................................361
Tire pressure warning light ........................................................ 362 Warning messages
AWD system....................................... 370
Dynamic radar cruise control ....................... 370, 373
Engine oil level.....................................373
Engine oil maintenance...................373
Engine oil pressure........................... 369
Hill-start assist control ..................... 372
Hood ........................................................373
Intuitive parking assist ......... 370, 373
Moon roof..............................................373
Open door ............................................373
Parking brake.......................................373
Pre-collision system............. 370, 373
Smart access system with push-button start ........................... 378
Steering lock........................................ 370
Tire pressure warning system................... 370, 373
Traction control................................... 372
Trunk.........................................................373
Vehicle stability control................... 372
Washer fluid .........................................373
Washer Checking............................................... 305
Preparing and checking before winter...................................... 183
Switch ........................................................ 147
Washing and waxing............................274
Weight Cargo capacity .................................... 179
Load limits............................................... 182
Weight .................................................... 406V
W