2012 Lexus IS220d cruise control

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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.

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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

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2-4. Using other driving systems
IS250/220d/200d_EE
CAUTION
Before using dynamic radar cruise control
Do not overly rely on vehicle-to-vehicle distance control.
Be aware of the set speed. If automatic deceleration/acceleration is not
appropriate, adjust the vehicle speed, as well as the distance between your
vehicle and vehicles ahead by applying the brakes etc.
Cautions regarding the driving assist systems
Observe the following precautions.
Failure to do so may cause an accident resulting in death or serious injury.
Assisting the driver to measure following distance
The dynamic radar cruise control is only intended to help the driver in
determining the following distance between the driver’s own vehicle and
a designated vehicle traveling ahead. It is not a mechanism that allows
careless or inattentive driving, and it is not a system that can assist the
driver in low-visibility conditions. It is still necessary for driver to pay
close attention to the vehicle’s surroundings.
Assisting the driver to judge proper following distance
The dynamic radar cruise control determines whether the following dis-
tance between the driver’s own vehicle and a designated vehicle traveling
ahead is appropriate or not. It is not capable of making any other type of
judgement. Therefore, it is absolutely necessary for the driver to remain
vigilant and to determine whether or not there is a possibility of danger in
any given situation.
Assisting the driver to operate the vehicle
The dynamic radar cruise control has no capability to prevent or avoid a
collision with a vehicle traveling ahead. Therefore, if there is ever any
danger, the driver must take immediate and direct control of the vehicle
and act appropriately in order to ensure the safety of all involved.
To avoid inadvertent cruise control activation
Switch the cruise control off using the “ON-OFF” button when not in use.

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2-4. Using other driving systems
2
When driving
IS250/220d/200d_EE
CAUTION
Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could cause an acci-
dent resulting in death or serious injury.
In heavy traffic
On roads with sharp bends
On winding roads
On slippery roads, such as those covered with rain, ice and snow
On steep downhills, or where there are sudden changes between sharp up
and down gradients
At entrances to expressways
When weather conditions are bad enough that they may prevent the sen-
sors from functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
Vehicle speed may exceed the set speed when driving down a steep hill.
When an approach warning buzzer is heard often
When your vehicle is towing a trailer or during emergency towing
When the sensor may not be correctly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles
are in front of you.
As the sensor may not be able to correctly detect these types of vehicles, the
approach warning (P. 208) will not be activated, and a fatal or serious
accident may result.
Vehicles that cut in suddenly
Vehicles traveling at low speeds
Vehicles that are not moving
Vehicles with small rear ends (trailers with no load on board etc.)
Motorcycles traveling in the same lane

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2-4. Using other driving systems
IS250/220d/200d_EE
CAUTION
Conditions under which the vehicle-to-vehicle distance control may not
function correctly
Apply the brakes as necessary in the following conditions as the radar sen-
sor may not be able to correctly detect vehicles ahead, and a fatal or serious
accident may result:
When water or snow thrown up by the surrounding vehicles hinders the
functioning of the sensor
When your vehicle is pointing upwards (caused by a heavy load in the
trunk etc.)
When the road curves or when the lanes are narrow
When steering wheel operation or your position in the lane is unstable
When the vehicle ahead of you decelerates suddenly
Handling the radar sensor
Observe the following to ensure the cruise control system can function
effectively.
Otherwise, the system may not function correctly and could result in an
accident.
Keep the sensor and front grille cover clean at all times.
Clean the sensor and front grille cover with a soft cloth so you do not
mark or damage them.
Do not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off position, the system may malfunc-
tion. If the sensor or surrounding area is subject to a strong impact, always
have the area inspected and adjusted by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
Do not disassemble the sensor.
Do not attach accessories or stickers to the sensor, grille cover or sur-
rounding area.
Do not modify or paint the sensor and grille cover.
Do not replace them with non-genuine parts.

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2-5. Driving information
IS250/220d/200d_EE
CAUTION
Vehicle speed in towing
Observe the legal maximum speeds for trailer towing.
Before descending hills or long declines
Reduce speed and downshift. However, never downshift suddenly while
descending steep or long downhill grades.
Operation of the brake
Do not hold the brake pedal depressed often or for long periods.
Doing so may result in the brake overheating or reduce braking effects.
To avoid accident or injury
Do not use cruise control when you are towing.
Do not tow the vehicle with the compact spare tire installed.

367
3-7. Other interior features
3
Interior features
IS250/220d/200d_EE
Changing the settings
Each item is displayed and its setting can be changed only in the following
conditions:
Intrusion sensor: When the “ENGINE START STOP” switch is off and
the auto alarm is not set.
Lexus parking assist-sensor: When the “ENGINE START STOP” switch
is in IGNITION ON mode.
Items other than the above: When the “ENGINE START STOP” switch
is in IGNITION ON mode and the vehicle is stopped.
Display
The display will return to the original display if the satellite switches are not
operated for an extended period.
Even if the display is in satellite switch mode, it will switch in the event of a
warning or when the dynamic radar cruise control (if equipped) is used. If
this occurs, press any of the satellite switches or “DISP” switch on the steer-
ing wheel to return the display to satellite switch mode.
Pre-crash braking function (P. 231) on/off
(if equipped)
Automatic folding and extending feature of
the rear view mirrors on/off (P. 84) (if
equipped)

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4-3. Do-it-yourself maintenance
IS250/220d/200d_EELeft side instrument panel
FuseAmpereCircuit
1FR P/SEAT LH30 APower seat
2A/C7.5 AAir conditioning system
3MIR HTR15 AOutside rear view mirror defoggers
4TV NO.110 ADisplay
5FUEL OPEN10 AFuel filler door opener
6TV NO.27.5 ALexus parking assist monitor
7PSB30 APre-crash seat belt
8S/ROOF25 AMoon roof
9TA I L10 ATail lights, license plate lights,
manual headlight leveling system
10PANEL7.5 A
Switch illumination, air condition-
ing system, display, audio, power
heater
11RR FOG7.5 ARear fog lights
12ECU-IG LH10 A
Air conditioning system, cruise
control, power steering, rain sen-
sor, anti-glare inside rear view mir-
ror, shift lock system, moon roof,
VSC, windshield wiper, Lexus
parking assist-sensor
13FR S/HTR LH15 ASeat heaters and ventilators
14RR DOOR LH20 APower windows