2014 Lexus IS300h cruise control

2554-5. Using the driving support systems
4
Driving
IS300h_EE(OM53C61E)
■Dynamic radar cruise control can be set when
●The shift lever is in D or range 4 or higher of S has been selected.
●Range 4 or higher of D has been selected by using the paddle shift.
●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. How-
ever, during vehicle-to-vehicle distance control mode, the vehicle speed may decrease
below the set speed in order to maintain the distance to the vehicle ahead.
■Automatic cancelation of vehicle-to-vehicle distance control
Vehicle-to-vehicle distance control driving is automatically canceled in the following situ-
ations:
●Actual vehicle speed falls below approximately 40 km/h (25 mph).
●VSC is activated.
●TRC is activated for a period of time.
●When the VSC or TRC system is turned off by pressing the VSC OFF switch.
●The sensor cannot operate correctly because it is covered in some way.
●The windshield wipers are operating at high speed (when the wipers are in AUTO
mode or the high speed wiper operation).
●When snow mode is set.
●Pre-crash braking is activated.
If vehicle-to-vehicle distance control driving is automatically canceled for any other rea-
son, there may be a malfunction in the system. Contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
■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 vehi-
cle speed.
At this time, the memorized set speed is not retained.
●Vehicle speed falls below approximately 40 km/h (25 mph).
●VSC is activated.
●TRC is activated for a period of time.
●When the VSC or TRC system is turned off by pressing the VSC OFF switch.
●Pre-crash braking is activated.
IS300h_EE_OM53C61E.book 255 ページ ２０１４年５月２０日　火曜日　午後５時４０分

2564-5. Using the driving support systems
IS300h_EE(OM53C61E)
■Radar sensor and grille cover
Always keep the sensor and grille cover clean to ensure that the vehicle-to-vehicle dis-
tance 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.
■Operation guide display
When the dynamic radar cruise control switch is operated, a guidance display is shown
on the meters for a few seconds as to how to operate the dynamic radar cruise control
switch or distance switch. (→P. 1 1 8 )
■Warning messages and buzzers for dynamic radar cruise control
Warning messages and buzzers are used to indicate a system malfunction or to inform
the driver of the need for caution while driving. (→P. 5 1 4 ) Grille cover
Radar sensor
1
2
IS300h_EE_OM53C61E.book 256 ページ ２０１４年５月２０日　火曜日　午後５時４０分

2594-5. Using the driving support systems
4
Driving
IS300h_EE(OM53C61E)
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 distance
between the driver’s own vehicle and a designated vehicle traveling ahead is appro-
priate 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.
■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 accident result-
ing 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 or snow
●On steep downhills, or where there are sudden changes between sharp up and down
gradients
Vehicle speed may exceed the set speed when driving down a steep hill.
●At entrances to expressways
●When weather conditions are bad enough that they may prevent the sensors from
functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
●When an approach warning buzzer is heard often
●When your vehicle is towing a trailer or during emergency towing
IS300h_EE_OM53C61E.book 259 ページ ２０１４年５月２０日　火曜日　午後５時４０分

2604-5. Using the driving support systems
IS300h_EE(OM53C61E)
CAUTION
■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. 254) 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
■Conditions under which the vehicle-to-vehicle distance control may not function cor-
rectly
Apply the brakes as necessary in the following conditions as the radar sensor may not
be able to correctly detect vehicles ahead, and a fatal or serious accident may result:
●When water or snow thrown up by a 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 grille cover clean at all times.
Clean the sensor and 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 malfunction. If the sen-
sor 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 surrounding area.
●Do not modify or paint the sensor and grille cover.
●Do not replace them with non-genuine parts.
IS300h_EE_OM53C61E.book 260 ページ ２０１４年５月２０日　火曜日　午後５時４０分

5148-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
(If equipped)
Indicates that the dynamic radar cruise control system is
unable to judge vehicle-to-vehicle distance
A buzzer also sounds.
→Tu r n o f f s n o w m o d e .
If the windshield wipers are on, turn them off or set
them to a mode other than AUTO or high speed
wiper operation.
(If equipped)
Indicates that the LDA (Lane Departure Alert) system is
suspended
The camera sensor temperature is higher than the
operation temperature range.
A buzzer also sounds.
→Restart the LDA after driving for a while.
(If equipped)
Indicates that:
• The grille shutter system cannot operate; or
• The grille shutter is dirty or covered with ice
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
(If equipped)
Indicates that a Blind Spot Monitor sensor or the sur-
rounding area on the bumper is dirty or covered with ice
A buzzer also sounds.
→Clean the sensor and its surrounding area on the
bumper.
(If equipped)
Indicates a malfunction in:
• The cruise control system; or
• The dynamic radar cruise control system
Press the “ON/OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
(If equipped)
Indicates a malfunction in the LDA (Lane Departure
Alert) system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Wa r n i n g m e s s a g eDetails/Actions
IS300h_EE_OM53C61E.book 514 ページ ２０１４年５月２０日　火曜日　午後５時４０分

5208-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
■Warning messages
The warning message illustrations used are intended as examples, and may differ from
the image that is actually displayed on the multi-information display.
■Warning message in radar cruise mode (if equipped)
In the following situations, the warning message may not be displayed even if vehicle-to-
vehicle distance decreases:
●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
■The LDA (Lane Departure Alert) lane departure warning function (if equipped)
In the following situations, the warning message will not be displayed even if a lane line is
crossed.
●When the vehicle speed deviates from the operating range of the LDA system func-
tions
●When the lane lines cannot be recognized
■After changing the engine oil (if equipped)
Make sure to reset the oil change system. (→P. 4 4 2 )
■Warning buzzer
→P. 5 0 7
IS300h_EE_OM53C61E.book 520 ページ ２０１４年５月２０日　火曜日　午後５時４０分

593Alphabetical index
IS300h_EE(OM53C61E)
Child-protectors ................................... 140
Cleaning ....................................... 426, 430
Aluminum wheels .............................. 427
Exterior.................................................... 426
Interior .....................................................430
Seat belts..................................................431
Clock .........................................................420
Coat hooks .............................................. 424
Condenser ............................................. 446
Console box ............................................ 414
Coolant ..................................................... 444
Capacity ................................................ 565
Checking ............................................... 444
Preparing and checking
before winter ....................................... 311
Cooling system...................................... 444
Engine overheating ..........................552
Hybrid system overheating ..........552
Cruise control
Cruise control ..................................... 245
Dynamic radar cruise control ..... 249
Cup holders ............................................. 415
Current fuel consumption.................... 116
Curtain shield airbags ........................... 43
Customizable features ....................... 574DAB (Digital Audio Broadcast) ..... 339
Daytime running light system ..........227
Defogger
Front windshield................................. 404
Outside rear view mirrors ............ 404
Rear window........................................ 404
Differential............................................... 567
Digital Audio Broadcast (DAB) ..... 339
Dimensions ............................................. 560
Display
Drive information...................................116
Dynamic radar cruise control ..... 249
LDA (Lane Departure Alert) .......262
Multi-information display...................115
Warning message ............................509
Distance ...................................................... 117
Do-it-yourself maintenance ............. 435
Door courtesy lights
Location ..................................................... 411
Wattage ................................................. 570
Door lock
Doors......................................................... 136
Smart entry & start system ............. 149
Wireless remote control ................. 130D
IS300h_EE_OM53C61E.book 593 ページ ２０１４年５月２０日　火曜日　午後５時４０分

594Alphabetical index
IS300h_EE(OM53C61E)
Doors .......................................................... 136
Automatic door locking and
unlocking system............................. 140
Door glasses ......................................... 184
Door lock.................................................139
Open door warning buzzer .......... 137
Open door warning
light ....................................................... 505
Outside rear view mirrors.............. 180
Rear door child-protector ............ 140
Drive information..................................... 116
Drive info 1/Drive info 2........................ 117
Driver’s and front passenger’s
seat belt reminder light .................. 505
Driver’s seat position memory ......... 168
Driving ........................................................ 192
Break-in tips ...........................................193
Correct driving posture .................... 36
Driving mode select switch ..........283
Hybrid vehicle driving tips ........... 309
Procedures .............................................192
Winter drive tips.................................... 311
Dynamic radar cruise control.......... 249E-mail ........................................................ 375
Eco drive mode ..................................... 283
Elapsed time .............................................. 116
Electric motor (traction motor) ..........79
Electric Power Steering (EPS) ....... 286
Function.................................................. 286
Warning light....................................... 504
Electronic key ......................................... 130
Battery-saving function ....................150
If the electronic key does not
operate properly ............................ 544
Replacing the battery ........................ 471
Emergency, in case of
If the 12-volt battery is
discharged ........................................ 547
If the electronic key does not
operate properly ............................ 544
If the hybrid system will not
start ......................................................... 541
If the shift lever cannot be
shifted from P................................... 543
If the warning buzzer sounds...... 503
If the warning light turns on .......... 503
If the warning message is
displayed ............................................509E
IS300h_EE_OM53C61E.book 594 ページ ２０１４年５月２０日　火曜日　午後５時４０分