2011 Lexus IS250 sensor

170
2-3. Operating the lights and windshield wipers
IS350/250_U
Washer/wiper operation
Wipers operate automatically.
(After operating several times,
the wipers operate one more
time after a short delay to pre-
vent dripping.)
Rain-sensing windshield wipers
With “AUTO” selected, the wipers will operate automatically when
the sensor detects falling rain. The system automatically adjusts
wiper timing in accordance with rain. Rain-sensing wiper operation
Low speed wiper operation
High speed wiper operation
Temporary operation

171
2-3. Operating the lights and windshield wipers
2
When driving
IS350/250_U
■The windshield wipers and washer can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■Effects of vehicle speed on wiper operation
Vehicle speed affects the following even when the wipers are not in “AUTO” mode.
●Intermittent wiper interval
●Wiper operation when the washer is being used (delay until drip prevention
wiper sweep occurs)
Low speed wiper operation selected, wiper operation will be switched from low
speed to intermittent wiper operation only when the vehicle is stationary.
(However, the mode cannot be switched when the adjustment dial for the intermit-
tent wiper interval is set to the lowest setting.)
Sensor sensitivity (high)
Sensor sensitivity (low)
Washer/wiper operation
Wipers operate automatically.
(After operating several times,
the wipers operate one more
time after a short delay to pre-
vent dripping.)

172
2-3. Operating the lights and windshield wipers
IS350/250_U
■Raindrop sensor (vehicles with rain-sensing windshield wipers)
●If the wiper switch is turned to the “AUTO” position while the “ENGINE START
STOP” switch is in IGNITION ON mode, the wiper will operate once to show
that auto mode is activated.
●If the temperature of the raindrop sensor is 194°F (90°C) or higher, or -22°F
(-30°C) or lower, automatic operation may not occur. In this case, operate the
wipers in any mode other than “AUTO”.
■Outside rear view mirror defogger activation linked to windshield wiper opera-
tion
The outside rear view mirror defogger automatically turns on when you operate the
windshield wipers.
■If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
■Customization that can be configured at Lexus dealer
Settings (e.g. drip prevention function) can be changed.
(Customizable features →P. 5 4 0 )
CAUTION
■Caution regarding the use of windshield wipers in “AUTO” mode (vehicles with
rain-sensing windshield wipers)
The windshield wipers may operate unexpectedly if the sensor is touched or the
windshield is subjected vibration in “AUTO” mode. Take care that your fingers etc.
do not become caught in the windshield wipers.
●The sensor judges the amount of rain-
drops.

179
2-4. Using other driving systems
2
When driving
IS350/250_U
Intuitive parking assist∗
The distance to obstacles measured by the sensors is communicated via
the multi-information display and a buzzer when parallel parking or
maneuvering into a garage. Always check the surrounding area when
using this system.
With navigation system
For vehicles equipped with a navigation system, refer to the separate “Navi-
gation System Owner’s Manual” for further details.
Without navigation system
■ Types of sensors
Front corner sensors
Rear corner sensors
Back sensors
■ Multi-information display ( →P. 1 6 0 )
Front corner sensor opera-
tion
Rear corner sensor operation
Back sensor operation
∗: If equipped

180
2-4. Using other driving systems
IS350/250_U
The distance display and buzzerWhen a sensor detects an obstacle, the direction of and the approximate
distance to the obstacle are displayed and the buzzer sounds.
■ Front corner sensors
Multi-information
displayApproximate distance to obstacleBuzzer
1.6 to 1.3 ft.
(50 to 40 cm)Medium
1.3 to 1.0 ft.
(40 to 30 cm)Fast
1.0 ft. (30 cm) or lessContinuous
■ Intuitive parking assist switch ( →P. 3 2 9 )
When on, an indicator is dis-
played to inform the driver that
the function is operational.

181
2-4. Using other driving systems
2
When driving
IS350/250_U■
Rear corner sensors
■ Back sensors
Multi-information
displayApproximate distance to obstacleBuzzer
1.6 to 1.2 ft.
(50 to 37.5 cm)Medium
1.2 to 0.8 ft.
(37.5 to 25 cm)Fa st
0. 8 f t . (25 cm) or le ssContinuous
Multi-information displayApproximate distance to obstacleBuzzer
4.9 to 2.0 ft.
(150 to 60 cm)Slow
2.0 to 1.5 ft.
(60 to 45 cm)Medium
1.5 to 1.1 ft.
(45 to 35 cm)Fa st
1.1 ft. (35 cm) or lessContinuous

182
2-4. Using other driving systems
IS350/250_U
Detection range of the sensorsApproximately 1.6 ft. (50 cm)
Approximately 1.6 ft. (50 cm)
Approximately 4.9 ft. (150 cm)
The diagram shows the detection
range of the sensors. Note that the
sensors cannot detect obstacles
that are extremely close to the
vehicle.
The range of the sensors may
change depending on the shape of
the object etc.

183
2-4. Using other driving systems
2
When driving
IS350/250_U
■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 objects may be judged by the sensor to be closer than they
are.
●The shape of the obstacle may prevent the 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 projecting outwards in the direction of your
vehicle
■When the display flashes and a message is displayed
→ P. 4 7 0