2018 Lexus GX460 cruise control

GX460_OM_OM60Q09U_(U)
2354-5. Using the driving support systems
4
Driving
■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 or plastic objects,
cannot be detected by the obstruction sensor.)
Dynamic radar cruise control is canceled if an obstruction is detected.
■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. 531)
■Certification
For vehicles sold in the U.S.A., Ha waii, Guam, Saipan and Puerto Rico
For vehicles sold in Canada Grille cover
Radar sensor
1
2

236
GX460_OM_OM60Q09U_(U)4-5. Using the driving support systems
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 de celeration/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 in tended 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 judg e 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 capab le 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 crui se 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.

GX460_OM_OM60Q09U_(U)
2374-5. Using the driving support systems
4
Driving
CAUTION
■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 contro l 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 thos e 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 (wit h towing hitch) 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. 232) 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

238
GX460_OM_OM60Q09U_(U)4-5. Using the driving support systems
CAUTION
■Conditions under which the vehicle-to-vehic
le distance control may not function cor-
rectly
Apply the brakes as necessary in the followi ng 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 the surrounding vehicles hinders the functioning
of the sensor
●When your vehicle is pointing upwards (c aused by a heavy load in the luggage com-
partment 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
■To ensure the sensor functions correctly
Do not do the following to the sensor or grille as doing so may cause the sensor not to
function correctly and could result in an accident:
●Sticking or attaching anything to them
●Leaving them dirty
●Disassembling or subjecting them to strong shocks
●Modifying or painting them
●Replacing them with non-genuine parts
■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 stro ng impact, always have the area inspected
and adjusted by your Lexus dealer.
●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.
●If the sensor needs to be replaced, contact your Lexus dealer.

5317-2. Steps to take in an emergency
GX460_OM_OM60Q09U_(U)
7
When trouble arises
(If equipped)
Indicates that the radar sensor is dirty or covered with
ice A buzzer also sounds.
→ Clean the sensor.
(If equipped)
Indicates that the radar cruise control system is unable to
judge vehicle-to-vehicle distance
A buzzer also sounds.
→ Turn off snow mode.
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 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.
Indicates a malfunction in:
• The cruise control sy stem (if equipped); or
• The dynamic radar cruise co ntrol system (if equipped)
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 your Lexus dealer.
Warning messageDetails/Actions

5367-2. Steps to take in an emergency
GX460_OM_OM60Q09U_(U)
■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, th e 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
■Conditions that the tire pressure wa rning system may not function properly
→ P. 480
■Warning buzzer
In some cases, the buzzer ma y not be heard due to being in a noisy location or audio
sound.

628Alphabetical index
GX460_OM_OM60Q09U_(U)
Condenser .............................................. 469
Console box ........................................... 406
Cool box ....................................................419
Cooling system ..................................... 467Engine overheating.......................... 564
Conversation mirror ........................... 422
Crawl Control ....................................... 346
Cruise control Cruise control...................................... 225
Dynamic radar cruise control......228
Cup holders ............................................408
Curtain shield airbags ........................... 36
Current fuel consumption ................... 87
Customizable features ....................... 594
DAC (Downhill Assist Control system)................................................... 349
Daytime running light system .......... 204
Defogger Front windshield ................................ 390
Outside rear view mirrors .............. 391
Rear window ......................................... 391
Differential ............................................... 575
Dimension ............................................... 570
Display Multi-information display ..................86
Trip information ..................................... 87
Warning message ............................ 528
Do-it-yourself maintenance ............. 459
Doors............................................................ 98 Back door ........................................... 105
Door glasses ......................................... 150
Door lock ..................................................98
Open door warning light............... 522
Outside rear view mirrors ...............147
Rear door child-protector................ 101 Driver’s seat position memory.......... 135
Driving ........................................................158
AVS switch ............................................. 341
Break-in tips ...........................................159
Correct posture .................................... 28
Procedures ............................................ 158
Winter drive tips .................................377
Dynamic radar cruise control ......... 228
Eco Driving Indicator ............................ 90
EDR (Event data recorder)................... 10
Electronic key ............................................94 Battery-saving function ......................117
If the electronic key does not operate properly ........................... 558
Replacing the battery ........................491
Emergency, in case of If the electronic key does not operate properly ........................... 558
If the engine will not start ...............556
If the vehicle has discharged battery ..........................561
If the warning buzzer sounds .................................................520
If the warning light turns on ..........520
If you have a flat tire .......................... 542
If you lose your keys......................... 622
If you think something is wrong.................................................... 518
If your vehicle becomes stuck...................................................... 567
If your vehicle needs to be towed ..................................................... 512
If your vehicle overheats ................ 564
D
E

635Alphabetical index
GX460_OM_OM60Q09U_(U)
Cruise control switch...........225, 228
“DAC” switch.......................................349
Door lock switches ............................ 105
Driving position memory switches ................................................ 135
Emergency flashers switch ............ 510
Engine switch ........................................ 189
Fog light switch ...................................... 211
Four-wheel drive control switch.................................................... 342
Headlight cleaner switch ...............220
Height control button ...................... 337
LDA switch ...........................................239
Light switches ......................................202
Moon roof switches........................... 153
Multi-terrain Monitor switch ......... 313
Multi-terrain Select switch............ 308
“ODO TRIP” button ............................84
Outside rear view mirror switches .................................................147
Parking assist........................................245
PCS off switch .................................... 369
Power door lock switch .................. 105
Power window switch ...................... 150
Rear window wiper and washer switch.................................... 218
Rear window and outside rear view mirror
defoggers switch ............................. 391
Seat heater switches........................ 400
Talk switch
*
Tilt and telescopic steering control switch .................................... 143 Vehicle-to-vehicle distance
button ................................................... 230
VSC OFF switch ............................... 353
Window lock switch ......................... 150
Windshield wipers and washer switch .................................... 213
Tachometer ............................................... 83
Tail lights .................................................. 202 Light switch........................................... 202
Talk switch
*
Telephone switch
*
Theft deterrent system Alarm ...........................................................74
Engine immobilizer system .............. 72
Tire inflation pressure......................... 483 Maintenance data.............................. 578
Tires ............................................................ 476 Chains ......................................................377
Checking ............................................... 476
If you have a flat tire .......................... 542
Inflation pressure................................483
Information............................................583
Replacing ............................................... 542
Rotating tires ........................................ 476
Size ........................................................... 578
Snow tires .............................................. 379
Spare tire................................................ 542
Tire pressure warning system ...................................................477
T
*: For vehicles with a navigation system or a multimedia system, refer to the “NAVIGATION SYSTEM OWNER’S MANUAL” or“MULTIMEDIA OWNER’S MANUAL”.