2018 Lexus GX460 Owner's Manual / LEXUS 2018 GX460 OWNER'S MANUAL (OM60Q09U)

GX460_OM_OM60Q09U_(U)
3454-5. Using the driving support systems
4
Driving
■Locking/unlocking the center differential
●If the operation is not completed, the center di fferential lock indicator blinks. If the indi-
cator does not turn off when unlocking the center differential, drive straight ahead
while accelerating or decelera ting, or drive in reverse.
●Avoid turning suddenly while the center differ ential is locked. If you do turn suddenly,
the difference in turning speeds between the front and rear wheels may have a similar
effect to braking, thus making driving difficult.
CAUTION
■While driving
Observe the following precautions. Failure to do so may cause an accident resulting in
death or serious injury.
●Never move the four-wheel drive control sw itch if the wheels have lost traction.
●Do not operate the center differential lock/unlock when the vehicle is turning or
when its wheels are spinning freely off the ground.
NOTICE
■To prevent damage to the center differential
●For normal driving on dry and hard surface roads, unlock the center differential.
●Unlock the center differential after the wheels are out of the ditch or off the slippery
or bumpy surface.

346
GX460_OM_OM60Q09U_(U)4-5. Using the driving support systems
Crawl Control∗
ON/OFF switch
Speed selection switch
On/off
The Crawl Control indicator is lit and
the slip indicator flashes when operat-
ing.
Also, the operating status and speed
select status of the Crawl Control are
shown on the multi-information display.
Higher
Lower
∗: If equipped
Allows travel on extremely rough off-ro
ad surfaces at a fixed low speed with-
out pressing the accelerator or brake pedal. Minimizes loss of traction or
vehicle slip when driving on slippery ro ad surfaces, helping for stable driving.
Crawl Control switch
1
2
System operation
1
2
3

GX460_OM_OM60Q09U_(U)
3474-5. Using the driving support systems
4
Driving
●LO (low mode)
Effective when traveling on rocks, or descending a slope of mogul and rub-
ble.
*
●MED (medium mode)
Effective when ascend ing a slope of mogul.
*
●HI (high mode)
Effective when ascending a slope of mo gul and rubble, or traveling on snow,
dirt, mud, sand, gravel, grass etc.
*
The position between low and medium modes and the position between medium
and high modes can also be selected.
*: Depending on the road surface, may not be the most effective.
■The Crawl Control can be operated when
●The shift lever is in any gear other than P or N.
●The four-wheel drive control switch is in L4.
●The driver’s door is closed.
■Automatic system cancelation
In the following situations, the system is canceled automatically:
At that time, the buzzer will sound, the slip indicator turns off, and the Crawl Control indi-
cator flashes.
A notification will be displa yed on the multi-information display for several seconds.
( → P. 528)
●When the shift lever is moved to P or N.
●When the four-wheel drive control switch is in H4.
●When the driver’s door is opened.
When turning off Crawl Control while travelin g, stop the vehicle before the Crawl Con-
trol indicator turns off, or drive extremely carefully.
■Function limit
●In the following situations, you will be able to use brake control to drive downhill at a
fixed low speed, but you will be unable to use engine control to drive uphill at a fixed low
speed.
• When the driving mode is set to second start mode.
• When the vehicle speed is higher than 6 mph (10 km/h).
●When the vehicle speed is higher than 15 mph (25 km/h), engine control and brake
control will stop temporarily. At that time, the Crawl Control indicator flashes.
Speed modes

348
GX460_OM_OM60Q09U_(U)4-5. Using the driving support systems
■When the Crawl Control system
is operated continuously
This may cause the brake actuator to overheat . In this case, the Crawl Control system will
stop operating, a buzzer will sound, the Crawl Control indicator will turn off after flashing
and the “TRAC OFF” will be show n on the multi-information display. In this case, quickly
stop the vehicle in a safe place and give the actuator adequate time to cool off. Refrain
from using the system until the message goes off. (The vehicle can be driven normally
during this time.)
■If the automatic transmission system overheats
The system will cease operation, a buzzer w ill sound and a warning message will be dis-
played to alert the driver. Stop the vehicle in a safe place until the warning message turns
off. ( →P. 533)
■Sounds and vibrations caused by the Crawl Control system
●A sound may be heard from the engine compartment when the engine is started or just
after the vehicle begins to move. This soun d does not indicate that a malfunction has
occurred in Crawl Control system.
●Either of the following conditions may occu r when the Crawl Control system is operat-
ing. None of these are indicators that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard afte r the vehicle comes to a stop.
■If the slip indicator comes on...
It may indicate a malfunction in the system. Cons ult your Lexus dealer.
CAUTION
■When using Crawl Control
Do not rely solely on the Crawl Control. This function does not extend the vehicle’s
performance limitations. Always thoroughly check the road conditions, and drive
safely.
■These conditions may cause the system not to operate properly
When driving on the following surfaces, the sy stem may not be able to maintain a fixed
low speed, which may re sult in an accident:
●Extremely steep inclines.
●Extremely uneven surfaces.
●Snow-covered roads, or other slippery surfaces.

349
GX460_OM_OM60Q09U_(U)4-5. Using the driving support systems
4
Driving
Downhill assist control system∗
Shift the “DAC” switch to ON. The
downhill assist control system indicator
light comes on and the system will
operate.
When the system is in operation, the slip
indicator light will flash, and the stop
lights/high mounted stop lights will be lit.
Shift the “DAC” switch to OFF while the
system is in operation. The downhill
assist control system indicator will flash as the system gradually ceases operation,
and will turn off when the system is fully off.
Shift the “DAC” switch to ON while the do wnhill assist control system indicator is
flashing to start the system again.
∗: If equipped
The downhill assist control system helps to prevent excessive speed on steep
downhill slopes.
The system will operate when the vehicl e is traveling under 15 mph (25 km/h)
and the four-wheel drive control switch is in the L4 position.
System operation
Turning off the system

350
GX460_OM_OM60Q09U_(U)4-5. Using the driving support systems
■Operating tips
The system will operate when the shift lever is in a position other than P, however to make
effective use of the system it is recommended that the shift lever be shifted to 2 or 1 range
of S mode.
■If the four-wheel drive
control switch is in H4
The system does not operate.
■When the downhill assist control system is operated continuously
This may cause the brake actuator to overheat. In this case, the downhill assist control
system will stop operating, a buzzer will sound and the downhill assist control system
indicator will start flashing, and the “TRAC OF F” will be shown on the multi-information
display. Refrain from using th e system until the downhill assi st control system indicator
stays on and the message goes of f. (The vehicle can be driven normally during this time.)
■Sounds and vibrations caused by the downhill assist control system
●A sound may be heard from the engine compartment when the engine is started or just
after the vehicle begins to move. This soun d does not indicate that a malfunction has
occurred in downhill assist control system.
●Either of the following conditions may occur when the do wnhill assist control system is
operating. None of these are indicators that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard afte r the vehicle comes to a stop.
■System malfunction
●The downhill assist control system indicator does not come on when the engine switch
is turned to IGNITION ON mode.
●The downhill assist control system indicator does not come on when the “DAC” switch
is pressed.
●The slip indicator comes on.
In the above cases, have your vehicle checked by your Lexus dealer.
CAUTION
■When using downhill assist control system
Do not rely overmuch on the downhill assist control system. This function does not
extend the vehicle’s performance limitations . Always thoroughly check the road condi-
tions, and drive safely.
■The system may not operate on the following surfaces, which may lead to an accident
causing death or serious injury
●Slippery surfaces such as wet or muddy roads
●Icy surface
●Unpaved roads

351
GX460_OM_OM60Q09U_(U)4-5. Using the driving support systems
4
Driving
Driving assist systems
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenly, or if the brakes are
applied while driving on a slippery road surface
◆Multi Terrain ABS (Anti-lock Brake System) (vehicles with a Multi-terrain
Select system)
Helps to prevent wheel lock when the brakes are applied suddenly, or if the brakes are
applied while driving on a slippery road su
rface, or in off-road conditions (such as
rough roads, sand and mud)
The Multi Terrain ABS operates in synchr onization with the Multi-terrain Select
◆Brake assist
Generates an increased level of braking force after the brake pedal is depressed
when the system detects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or turning on slippery
road surfaces
◆TRAC (Traction Control) for H4 position
Helps to maintain drive power and prevent the drive wheels from spinning when start-
ing the vehicle or accelera ting on slippery roads
To help enhance driving safety and perf ormance, the following systems oper-
ate automatically in response to variou s driving situations. Be aware, however,
that these systems are supplementary and should not be relied upon too heav-
ily when operating the vehicle.

352
GX460_OM_OM60Q09U_(U)4-5. Using the driving support systems
◆Active TRAC (Traction Control) for L4 position*
Helps to maintain drive power and prevent the 4 wheels from spinning when starting
the vehicle or accelerating on slippe
ry roads, or in off-road conditions
◆Hill-start assist control (if equipped)
Helps to prevent the vehicle from rolling back ward when starting on an incline or slip-
pery slope
◆KDSS (Kinetic Dynamic Suspension System)
KDSS helps to enhance ride comfort and hand ling response by using a hydraulic con-
trol system to control the su spension stabilizer bars in response to road surface and
driving conditions during co rnering or off-road driving
◆PCS (Pre-Collision system) (if equipped)
→P. 368
◆Trailer Sway Control
Helps the driver to control trailer sway by selectively applying brake pressure for indi-
vidual wheels and reducing engine to rque when trailer sway is detected.
Trailer Sway Control is part of the VSC system and will not operate if VSC turned off
or experiences a malfunction.
*: The function only works in vehicles with Multi-terrain Sele ct when Multi-terrain
Select is switched on
If the vehicle is in danger of slipping or
rolling backward when starting on an
incline, or if any of the drive wheels
spins, the slip indicator light flashes to
indicate that the TRAC or Active
TRAC/VSC/Trailer Sway Control/hill-
start assist control systems are operat-
ing.
The stop lights and high mounted stoplight tu rn on when the hill-start assist control
system is operating.
When the TRAC or Active TRAC/VSC/Tr ailer Sway Control/hill-start
assist control systems are operating