2009 Lexus IS250 brake light

301
4-2. Maintenance
4
Maintenance and care
08_IS350/250_U_(L/O_0808)
Vehicle interior
ItemsCheck points
Accelerator pedal• Moves smoothly (without uneven pedal effort or catching)?
Automatic transmission “Park”
mechanism• Can the vehicle be hold securely on an incline with the shift lever in
P?
Brake pedal
• Moves smoothly?
• Does it have appropriate clearance and correct amount of free play?
Brakes
• Not pull to one side when applied?
• Loss of brake effectiveness?
• Spongy feeling brake pedal?
• Pedal almost touches floor?
Head restraints• Move smoothly and lock securely?
Indicators/buzzers•Function properly?
Lights
• Do all the lights come on?
• Headlights aimed correctly? (

P. 3 6 1 )
Pa r k i n g b r a ke
• Moves smoothly?
• Can hold the vehicle securely on an incline?
Seat belts
• Does the seat belt system operate smoothly?
• Are the belts undamaged?
Seats• Do the seat controls operate prop- erly?

320
4-3. Do-it-yourself maintenance
08_IS350/250_U_(L/O_0808)
CAUTION
■When filling the reservoir
Take care because brake fluid can harm your hands or eyes and damage painted
surfaces.
If fluid gets in your eyes, flush your eyes with clean water immediately.
If you still experience discomfort, see a doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear or
when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious problem.

5
When trouble arises
383
08_IS350/250_U_(L/O_0808)
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
*: Parking brake engaged warning buzzer:

P. 3 9 5
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Brake system warning light (warning buzzer)*
• Low brake fluid
• Malfunction in the brake booster systemThis light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released the system is operating normally.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, but then turns off, this does not necessar-
ily indicate a malfunction in the system.

5
When trouble arises
385
5-2. Steps to take in an emergency
08_IS350/250_U_(L/O_0808)
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.
Pre-collision system warning light (if equipped)Indicates a malfunction in the pre-collision system.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that a door or a
trunk is not fully closed.
Check that all doors and the
trunk are closed.
Low fuel level warning light
Remaining 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.

5
When trouble arises
389
5-2. Steps to take in an emergency
08_IS350/250_U_(L/O_0808)
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.

5
When trouble arises
399
5-2. Steps to take in an emergency
08_IS350/250_U_(L/O_0808)
Wa r n i n g m e s s a g eDetailsCorrection procedure
(Flashing and then con-tinuously on)
(Flashing)
(If equipped)Indicates that the radar
cruise control system is
unable to judge vehicle-
to-vehicle distance.
• Switch the driving mode to either the normal or
power mode.
• If the windshield wipers are on, turn them off or
set them to either the
intermittent or the slow
mode.
(Flashing)
(If equipped)
Indicates that your vehi-
cle is nearing the vehicle
ahead (in radar cruise
mode).
Slow the vehicle by apply-
ing the brakes.
■Changing the engine oil (U.S.A. only)
Make sure to reset the oil change system. (

P. 313)
■Warning light display in radar cruise mode
In the following cases, the warning light may not be displayed even if vehicle-to-
vehicle distance closes.
●When your vehicle and the vehicle ahead are traveling at the same speed or the
vehicle ahead is traveling more quickly than your vehicle
●When the vehicle ahead is traveling at a very low speed
●Immediately after cruise control speed is set
●At the instant the accelerator pedal is depressed

474
08_IS350/250_U_(L/O_0808)
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
ABSAnti-Lock Brake System
AFSAdaptive Front-lighting System
AI-SHIFTArtificial Intelligence Shift
ALRAutomatic Locking Retractor
AW DAll Wheel Drive
CALCalibration
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
PCSPre-Collision System
SRSSupplemental Restraint System
TINTire Identification Number

476
08_IS350/250_U_(L/O_0808)
Alphabetical index
Alphabetical index
A/C ............................................................. 210
ABS.............................................................. 186
AFS .............................................................. 157
Adaptive front lighting system ......... 157
Air conditioning filter .......................... 342
Air conditioning system
Air conditioning filter ....................... 342
Automatic air conditioning system ....................................................210
Airbags
Airbag operating conditions........... 86
Airbag precautions for your child.......................................................... 90
Airbag warning light ........................384
Curtain shield airbag operating conditions.............................................. 87
Curtain shield airbag precautions .......................................... 90
Front passenger occupant classification system......................... 95
General airbag precautions ........... 90
Locations of airbags............................ 84
Modification and disposal of airbags .................................................... 94
Proper driving posture ............. 82, 90
Side airbag operating conditions.............................................. 87
Side airbag precautions .................... 90
SRS airbags ............................................. 84
Alarm ............................................................ 79
Antenna .................................................... 226
Anti-lock brake system ....................... 186
Armrest..................................................... 272
Ashtrays .................................................... 263
Audio input .............................................. 244 Audio system
Antenna...................................................226
Audio input............................................244
AUX adapter .......................................244
CD player/changer ..........................229
MP3/WMA disc............................... 235
Optimal use ........................................... 241
Portable music player ...................... 244
Radio ........................................................ 222
Steering wheel audio switch........ 245
Automatic air conditioning
system ..................................................... 210
Automatic headlight leveling system ..................................................... 158
Automatic light control system.........156
Automatic transmission
Automatic transmission ..................... 131
If the shift lever cannot be
shifted from P..................................... 415
S mode ..................................................... 134
AUX adapter ......................................... 244
Back-up lights
Wattage ................................................. 445
Battery
Checking................................................. 321
If the vehicle has discharged battery ................................................... 421
Preparing and checking before winter.................................... 200
Bottle holders......................................... 256
Brake
Fluid ............................................................ 319
Parking brake........................................ 140
Brake assist .............................................. 186
A
B