2012 Lexus IS220d sensor

189
2-3. Operating the lights and windshield wipers
2
When driving
IS250/220d/200d_EE
Automatic light off system
This system is active when the “ENGINE START STOP” switch is in IGNI-
TION ON mode and the headlight lever is in any position other than
.
When the light switch is in : The headlights turn off automatically
if the “ENGINE START STOP” switch is switched to ACCESSORY
mode or turned OFF.
When the light switch is in “AUTO”: The headlights and tail lights turn
off automatically if the “ENGINE START STOP” switch is switched to
ACCESSORY mode or turned OFF and the driver's door is opened.
Even if a door other than the driver's door is opened, the automatic light
off system will not operate.
To turn the lights on again, switch to IGNITION ON mode, or turn the light
switch off once and then back to
or .
Light reminder buzzer
A buzzer sounds when the “ENGINE START STOP” switch is turned OFF
or switched to ACCESSORY mode and the driver's door is opened while the
lights are turned on.
Automatic headlight leveling system (vehicles with discharge headlights)
The level of the headlights is automatically adjusted according to the num-
ber of passengers and the loading condition of the vehicle to ensure that the
headlights do not interfere with other road users.
Customization that can be configured at any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
Settings of the light sensor sensitivity can be changed.
(Customizable features P. 556)
NOTICE
To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not run-
ning.

193
2-3. Operating the lights and windshield wipers
2
When driving
IS250/220d/200d_EE
Rain-sensing windshield wipers
When is selected, the wipers will operate automatically
when the sensor detects falling rain. The system automatically
adjusts wiper timing according to rain volume and vehicle
speed.
The wiper operation is selected as follows by turning the switch
ring. When is selected, the sensor sensitivity can be also
adjusted:
Off
Rain-sensing wind-
shield wiper opera-
tion
Low speed wind-
shield wiper opera-
tion
High speed wind-
shield wiper opera-
tion
Temporary opera-
tion
Releasing the lever returns to

194
2-3. Operating the lights and windshield wipers
IS250/220d/200d_EE
Sensor sensitivity (high)
Sensor sensitivity (low)
Washer/wiper operation
Wipers operate automati-
cally. (After operating several
times, the wipers operate one
more time after a short delay
to prevent dripping.)

195
2-3. Operating the lights and windshield wipers
2
When driving
IS250/220d/200d_EE
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 preven-
tion 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 station-
ary.
(However, the mode cannot be switched when the adjustment dial for the
intermittent wiper interval is set to the lowest setting.)
Raindrop sensor (vehicles with rain-sensing windshield wipers)
If the wiper switch is turned to “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 90C (194F) or higher, or -
30C (-22F) 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
operation
The outside rear view mirror defogger automatically turns on when you
operate the windshield wipers.
The sensor judges the amount of rain-
drops.

196
2-3. Operating the lights and windshield wipers
IS250/220d/200d_EE
If no windshield washer fluid sprays
If there is washer fluid in the windshield washer fluid reservoir and no
washer fluid sprays, the nozzle may be blocked. In this case, contact any
authorized Lexus dealer or repairer, or another duly qualified and equipped
professional, and have your Lexus inspected.
Customization that can be configured at any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
Settings (e.g. drip prevention function) can be changed.
(Customizable features P. 556)
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 subject to vibration in “AUTO” mode. Take care that your
fingers or anything else do not become caught in the windshield wipers.
Caution regarding the use of washer fluid
When it is cold, do not use the washer fluid until the windshield becomes
warm. The fluid may freeze on the windscreen and cause low visibility. This
may lead to an accident, resulting in death or serious injury.
NOTICE
When the windshield is dry
Do not use the wipers, as they may damage the windshield.
When a nozzle becomes blocked
Do not try to clear it with a pin or other object. The nozzle will be damaged.
When there is no washer fluid spray from the nozzle
Damage to the washer fluid pump may be caused if the lever is pulled
toward you and held continually.

207
2-4. Using other driving systems
2
When driving
IS250/220d/200d_EE
Driving in vehicle-to-vehicle distance control mode
This mode employs a radar sensor to detect the presence of vehi-
cles up to approximately 120 m (400 ft.) ahead, determines the cur-
rent vehicle-to-vehicle following distance, and operates to
maintain a suitable following distance from the vehicle ahead.
Note that vehicle-to-vehicle distance will close in when traveling on
long downhill slopes.
Example of constant speed cruising
When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-
to-vehicle distance can also be set by operating the vehicle-to-vehicle
distance control.
Example of deceleration cruising
When the vehicle ahead is driving slower than the set speed
When a vehicle is detected running ahead of you, the system automat-
ically decelerates your vehicle. When a greater reduction in vehicle
speed is necessary, the system applies the brakes. A warning tone
warns you when the system cannot decelerate sufficiently to prevent
your vehicle from closing in on the vehicle ahead.

210
2-4. Using other driving systems
IS250/220d/200d_EE
Adjusting the speed setting:
P. 2 0 4
Canceling and resuming the
speed setting: P. 206
Dynamic radar cruise control can be set when
The shift lever is in the D or range 4 or higher of S has been selected.
Range 4 or higher has been selected by using the paddle shift.
(vehicles with paddle shift switch)
Vehicle speed is above approximately 50 km/h (30 mph).
Accelerating after setting the vehicle speed
The vehicle can accelerate normally. After acceleration, the set speed
resumes. However, during vehicle-to-vehicle distance control mode, the
vehicle speed may decrease below the set speed in order to maintain the dis-
tance to the vehicle ahead.
Automatic cancelation of vehicle-to-vehicle distance control
Vehicle-to-vehicle distance control driving is automatically canceled in the
following situations:
Actual vehicle speed falls below approximately 40 km/h (25 mph).
VSC is activated.
The sensor cannot operate correctly because it is covered in some way.
The windshield wipers are operating at high speed (when the wiper
switch is set to the “AUTO” mode or the high speed wiper operation
position).
When snow mode is set. (IS250 only)
If vehicle-to-vehicle distance control driving is automatically canceled for
any other reason, there may be a malfunction in the system. Contact any
authorized Lexus dealer or repairer, or another duly qualified and equipped
professional.

211
2-4. Using other driving systems
2
When driving
IS250/220d/200d_EE
Automatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following
situations:
Actual vehicle speed is more than approximately 16 km/h (10 mph)
below the set vehicle speed.
At this time, the memorized set speed is not retained.
Actual vehicle speed falls below approximately 40 km/h (25 mph).
VSC is activated.
Radar sensor and grille cover
Always keep the sensor and grille cover clean to ensure that the vehicle-to-
vehicle distance control operates properly. (Some obstructions, such as
snow, ice and plastic objects, cannot be detected by the obstruction sensor.)
Dynamic radar cruise control is canceled if an obstruction is detected.
Warning lights, messages and buzzers for dynamic radar cruise control
Warning lights, messages and buzzers are used to indicate a system mal-
function or to inform the driver of the need for caution while driving. (P.
467, 473)
Grille cover
Radar sensor