check engine Lexus IS250 2008 Owner's Guide

5
When trouble arises
365
5-2. Steps to take in an emergency
08_IS350/250_U_(L/O_0708)
■If the tire pressure warning system is inoperative
The tire pressure warning system will become inoperative in the following condi-
tions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and transmitters are used
●If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer
●If electronic devices or facilities using similar radio wave frequencies are nearby
●If a radio set at similar frequencies is in use in the vehicle
●If there is a lot of snow or ice on the vehicle, in particular, around the wheels or
wheel housings
●If non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)
●If tire chains are used
●If the tire pressure warning select switch is set to a different tire settings
●If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher
■If the tire pressure warning light comes on after blinking for 1 minute frequently
If the tire pressure warning light comes on after blinking for 1 minute frequently
when the “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.

5
When trouble arises
375
5-2. Steps to take in an emergency
08_IS350/250_U_(L/O_0708)
Wa r n i n g m e s s a g eDetailsCorrection procedure
Indicates that engine oil
level is low.Check the level of engine
oil, and add if necessary.
(U.S.A. only)
Indicates that the engine
oil is scheduled to be
changed.
Check the engine oil, and
change if necessary.
Comes on approximately
4500 miles (7200 km)
after the engine oil is
changed. (The indicator
will not work properly
unless the oil mainte-
nance data has been
reset.)
(U.S.A. only)
Indicates that the engine
oil should be changed.
Check and change the
engine oil.
Comes on approximately
5000 miles (8000 km)
after the engine oil is
changed (and the oil
maintenance data has
been reset).

378
5-2. Steps to take in an emergency
08_IS350/250_U_(L/O_0708)
Follow the correction procedures.After taking the specified steps to correct the suspected problem, check
that the warning light turns off.
InteriorbuzzerExterior buzzerWarning messageDetailsCorrection
procedure
Once
(Comes on for 10 seconds.)
(Flashing)
Indicates that an
attempt was made
to start the engine
without the elec-
tronic key being
present, or the
electronic key was
not functioning
normally.
Start the engine
with the elec-
tronic key
present.
*
Once3 times
(Flashing)
Indicates that a
door other than
the driver’s door
has been opened
or closed with the
“ENGINE START
STOP” switch in
any mode other
than OFF and the
electronic key
outside of the
detection area.
Confirm the loca-
tion of the elec-
tronic key.

388
5-2. Steps to take in an emergency
08_IS350/250_U_(L/O_0708)
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 greater 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
08_IS350/250_U_(L/O_0708)
■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 part 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 the second vehicle and turn the
“ENGINE START STOP” switch to IGNITION ON mode,
then start the vehicle’s engine.
Once the vehicle’s engine has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the engine starts, have the vehicle checked at your Lexus dealer
as soon as possible.STEP5
STEP6

400
5-2. Steps to take in an emergency
08_IS350/250_U_(L/O_0708)
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 carefully 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
08_IS350/250_U_(L/O_0708)
■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 inspecting 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 down 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
08_IS350/250_U_(L/O_0708)
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 satisfy 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

451
Alphabetical index
08_IS350/250_U_(L/O_0708)
Engine coolantCapacity.....................................................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 ............................ 358
First-aid kit storage belt....................... 261
Floor mat.................................................. 260
Fluid
Brake .........................................................301
Washer ...................................................305
Fog lights Switch ........................................................ 146
Wattage ................................................. 420
Foot well lighting .................................... 231
Front fog lights Switch ........................................................ 146
Wattage ................................................. 420
Front passenger occupant
classification system ........................... 90
Front passenger's seat belt
reminder light ......................................362 Front seats
Adjustment ............................................... 44
Driving position memory .................. 46
Seat position memory ........................ 49
Front turn signal lights Switch........................................................ 128
Wattage..................................................420
Fuel
Capacity ................................................ 409
Fuel gauge.............................................. 130
Fuel pump shut off system............. 357
Gas station information ................. 460
Information ..............................................421
Refueling....................................................69
Fuel door ..................................................... 69
Fuel filler door ........................................... 69
Fuel pump shut off system ................. 357
Fuses .......................................................... 327
Garage door opener .......................... 264
Gas station information......................460
Gauges ...................................................... 130
Glove box ................................................ 236
Glove box light ...................................... 237
Head restraints Adjusting ....................................................51
Headlight aim .......................................... 341
Headlight cleaner ....................................151
F
G
H

455
Alphabetical index
08_IS350/250_U_(L/O_0708)
Sun visors..................................................242
SunshadeRear .......................................................... 256
Roof ..............................................................67
Switch ECT switch ............................................. 123
Engine switch .......................................... 117
ETCS switch .......................................... 126
Fog light switch..................................... 146
Ignition switch.......................................... 117
Light switches........................................ 143
Power door lock switch .....................37
Power window switch.........................64
Satellite switches ................................ 245
Transmission shift switches ............ 124
Window lock switch ............................64
Wipers and washer switch............. 147
Tachometer Tacho 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 ..................................................420
T
*: Refer to the “Navigation System Owner’s Manual”