2012 Lexus IS250 brake sensor

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●Event data recorder
Your vehicle has computers that monitor and control certain aspects of your vehi-
cle. These computers assist in driving an d maintaining optimal vehicle performance.
Besides storing data useful for troublesh ooting, there is an event data recorder
(EDR) that records data in a crash or near crash event.
The SRS airbag sensor assembly contains the EDR. In a crash or near crash event,
this device may record the following information:
•Engine speed
• Whether the brake pedal was depressed or not
• Vehicle speed
• To what extent the accelerator pedal was depressed
• The transmission shift position
• Whether the driver and front passenger wore seat belts or not
• Driver’s seat position
• SRS airbag deployment data
• SRS airbag system diagnostic data
• Front passenger’s occupant classification
The information above is intended to be used for the purpose of improving vehicle
safety performance. Unlike general data recorders, the EDR does not record sound
data such as conversation between passengers.

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2-3. Operating the lights and windshield wipers
Turning on the high beam headlightsWith the headlights on, push the
lever forward to turn on the high
beams.
Pull the lever back to the center
position to turn the high beams off.
Pull the lever toward you to turn
on the high beams.
Release to turn them off. You can
flash the high beams with the head-
lights on or off.
■Daytime running light system
●Vehicles with halogen headlights: to make your vehicle more visible to other
drivers, the headlights turn on automatically (at a reduced intensity) whenever
the engine is started and the parking brake is released. Daytime running lights
are not designed for use at night.
Vehicles with discharge headlights: to make your vehicle more visible to other
drivers, the parking lights turn on automatically (at a increased intensity) when-
ever the engine is started and the pa rking brake is released. Daytime running
lights are not designed for use at night.
●Compared to turning on th e headlights, the daytime running light system offers
greater durability and consumes less electricity, so it can help improve fuel
economy.
■Headlight control sensor
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the wind-
shield.
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight system to malfunction.

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2-4. Using other driving systems
■Sensor detection information
●Certain vehicle conditions and the surrounding environment may affect the
ability of the sensor to correctly detect obstacles. Particular instances where this
may occur are listed below.
• There is dirt, snow or ice on the sensor.
• The sensor is frozen.
• The sensor is covered in any way.
• The vehicle is leaning considerably to one side.
• On an extremely bumpy road, on an incline, on gravel, or on grass.
• The vicinity of the vehicle is noisy due to vehicle horns, motorcycle engines,
air brakes of large vehicles, or other loud noises producing ultrasonic waves.
• There is another vehicle equipped with parking assist sensors in the vicinity.
• The sensor is coated with a sheet of spray or heavy rain.
• The vehicle is equipped with a fender pole or wireless antenna.
• Towing eyelets are installed.
• The bumper or sensor receives a strong impact.
• The vehicle is approaching a tall or curved curb.
• In harsh sunlight or intense cold weather.
In addition to the examples above, there are instances in which, because of their
shapes, signs and other object s may be judged by the sensor to be closer than they
are.
●The shape of the obstacle may prevent th e sensor from detecting it. Pay particu-
lar attention to the following obstacles.
• Wires, fences, ropes etc.
• Cotton, snow and other materials that absorb radio waves
• Sharply-angled objects
•Low obstacles
• Tall obstacles with upper sections projec ting outwards in the direction of your
vehicle
■When the display flashes an d a message is displayed
 P. 4 8 1

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Alphabetical index
MaintenanceDo-it-yourself maintenance ...........391
General maintenance ..................... 387
Maintenance data..............................520
Maintenance requirements ..........385
Maintenance data................................ 386
Manual transmission............................. 152
Meter Instrument panel light control ...... 159
Meters ...................................................... 158
Micro dust and pollen filter* ............220
Mirrors Inside rear view mirror....................... 75
Side mirror heater ............................. 224
Side mirrors .............................................. 77
Vanity mirrors...................................... 337
Moon roof ...................................................83
MP3 disc* ................................................ 244
Multi-information display ....................167
Noise from under vehicle...................... 19
Odometer................................................. 158
Oil Engine oil ................................................ 401
Opener Fuel filler door......................................... 87
Hood........................................................ 394
Trunk ........................................................... 52 Outer foot lights
Outer foot lights................................. 325
Wattage ................................................. 536
Outside rear view mirrors Adjusting and folding .......................... 77
Mirror position memory ................... 58
Outside temperature display ........... 168
Overhead console ............................... 332
Overhead courtesy lights Overhead courtesy lights ............. 325
Wattage ................................................. 536
Overheating, Engine ........................... 513
Parking assist sensors*........................ 190
Parking brake.......................................... 155
Parking lights Replacing light bulbs ......................... 451
Switch .........................................................172
Wattage ................................................. 536
Personal lights Switch ....................................................... 327
Power outlet ........................................... 344
Power windows ........................................ 80
Radiator .................................................... 406
Radio* ....................................................... 229
RDS* ............................................................231
Rear sunshade ....................................... 352M
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