brake LEXUS LX570 2018 Repair Manual

310
LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems■
Automatic system cancelation 
Crawl Control
In the following situations, the buzzer will sound intermittently an d Crawl Control will be
canceled automatically. In this event, the Crawl Control indicator will flash and then go
off, the Turn Assist indicator will go off (if th e Turn Assist function is in use), and a message
stating that Crawl Cont rol has been turned off will be di splayed on the multi-information
display for several seconds. ●
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. 
Turn Assist function
When the center differential is locked, the buzzer will sound inte rmittently and the Turn
Assist function will be canceled automatically. In this event, the Turn Assist indicator will
go off, and a message stating that the Turn Assi st function has been turned off will be dis-
played on the multi-informatio n display for several seconds.■
Function limitations 
Crawl Control ●
In the following situations, brake control can be used to drive downhill at a constant
speed. However, engine control is not available when drivin g uphill at a co nstant speed.
•When switched to second start mode.●
In the following situation, engine control an d brake control will stop temporarily. In this
event, the Crawl Control indicator will flash.
• When the vehicle speed exceeds approximately 15 mph (25 km/h). 
Turn Assist function
In the following situations, the Turn Assist func tion will stop temporarily. In this event, the
Turn Assist indicator will flash. ●
When the vehicle speed exceeds approximately 6 mph (10 km/h). ●
When the shift lever is moved to R. ■
When the Crawl Control system is operated continuously●
If Crawl Control is used continuously for a long time, the buzzer will sound, a malfunc-
tion notification will be displayed on the multi-information display, the Crawl Control
indicator will go off, and Crawl Control will be temporarily inoperable as a result of the
brake system overheating. In this event, stop the vehicle immediately in a safe place,
and allow the brake system to cool down sufficiently until the TRAC OFF indicator
goes off. (In the meantime, normal driving is possible.) ●
If Crawl Control is used continuously for a long time, the buzzer will sound, the system
will be temporarily canceled, and a malfunct ion notification will be displayed on the
multi-information display as a result of th e automatic transmission system overheating.
Stop the vehicle in a safe place until the display goes off. ■
When depressing the accelerator pedal while the Crawl Control is operating
Multi-terrain Select operates in AUTO mode. ( → P. 313)

312
LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
Multi-terrain Select 
When the Crawl Control is turned off
Select a mode that most closely matche s the type of terrain on which you are
driving from among 5 modes.
Brake control can be optimized in accordance with the selected mode.
When the Crawl Control is turned on
A mode which matches the road conditions is automatically selected by
depressing the accelerator pedal (AUTO mode).
Multi-terrain Select mode selector
switch
Multi-terrain Select indicator
Multi-information display
Displays status information including
operating status and road type
selection.Multi-terrain Select is a system that he lps drivability in off-road situations.
Multi-terrain Select switch/indicators 1
2
3

314
LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
Operate the Multi-terrain Select mode
selector switch du ring Multi-terrain
Select control to select a mode. Once the mode is confirmed, the mode
name will be displayed and the control
will switch. ■
Automatic system cancelation
In the following situations, the Multi-terrain Select indicator will go off, and Multi-terrain
Select will be canceled automatically. ●
When the four-wheel drive control switch is in H4. ●
When Active TRAC and VSC are off. ■
When it is difficult to generate traction
MUD & SAND mode provides the largest amou nt of tire slippage, followed by LOOSE
ROCK, MOGUL, ROCK & DIRT and ROCK mode.
Drivability can be improved by selecting a mo de which provides a smaller amount of tire
slippage than the current mode when the amount of tire slippage is large, or conversely
selecting a mode which provides a larger amou nt of tire slippage than the current mode
when the amount of tire slippage is small. ■
When the vehicle is stuck
Switching the transfer and differential
For the operation of the following func tions, refer to th e following pages.●
Four-wheel drive system ( → P. 303)●
Center differential lock ( → P. 304)■
When the brake system operates continuously
The brake system may overheat. In this case , a buzzer will sound, the TRAC OFF indica-
tor will flash, and Multi-terrain Select will be temporarily inoperable. In this event, stop
the vehicle immediately in a safe place, and allow the brake system to cool down suffi-
ciently. (There is no problem wi th continuing normal driving.)
After a short time, the TRAC OFF indicator will go off, and you will be able to use Multi-
terrain Select. ■
When there is a malfunction in the system
The slip indicator light will come on. Have the vehicle in spected by your Lexus dealer
immediately.Switching modes

377
LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
4
Driving
Driving assist systems ◆ Multi Terrain 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 su rface, or in off-road conditions (such as
rough roads, sand and mud)
◆ Brake assist Generates an increase d 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
◆ Active TRAC (Traction Control) 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 Helps to reduce the backward movement of the vehicle when starting on an incline or
slippery slope
◆ AVS (Adaptive Variable Suspension system) By independently controlling the damping force of the shock absorbers for each of
the 4 wheels according to th e road and driving conditions, this system helps riding
comfort with superior steering stabilit y, and helps good vehicle posture. When
SPORT S+ mode is selected by the drivin g mode select switch, the damping force is
suitable for sporty driving. ( → P. 284)
◆ VGRS (Variable Gear Ratio Steering) Helps to adjust the wheel turning angle in accordance with the vehicle speed and
steering wheel movement.
◆ 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.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.

378
LX570_OM_OM60Q78U_(U) 4-5. Using the driving support systems
The slip indicator light flashes to indi-
cate that the VSC/Trailer Sway Con-
trol/Active TRAC/hill-start assist
control systems have been engaged. The stop lights and high mounted stop-
light turn on when the hill-start assist
control system or Trailer Sway Control is
operating.
If the vehicle gets stuck in fresh snow or mud, Active TRAC system reduce
power from the engine to the wheels. You may need to turn the system off to
enable you to rock the vehi cle in order to free it.
Quickly push and release the button to
turn off Active TRAC. The TRAC OFF indicator will come on.
Push the button again to turn the system
back on.
■
Turning off Active TRAC, VSC and Trailer Sway Control
Push and hold the button for more than 3 seco nds while the vehicle is stopped to turn off
Active TRAC, VSC and Trailer Sway Control
The VSC OFF indicator light and TR AC OFF indicator will come on.
*Push the button again to turn the system back on.
* : On vehicles with pre-collision system, pre-co llision brake assist and pre-collision brak-
ing will also be disabled. The PCS warning light will come on and the message will be
shown on the multi-information display. ( → P. 249)■
Automatic reactivation of Active TRAC, VSC and Trailer Sway Control
Turning the engine switch of f after turning off the Active TRAC and VSC systems will
automatically re-enable them.When the VSC/Trailer Sway Cont rol/Active TRAC/hill-start assist
control systems are operating
Disabling the Active TRAC system

LX570_OM_OM60Q78U_(U) 3794-5. Using the driving support systems
4
Driving ■
Automatic Active TRAC reactivation
If only the Active TRAC system is turned of f, the Active TRAC system will turn on when
vehicle speed increases. ■
Automatic Active TRAC, VSC and Tr ailer Sway Control reactivation
If the Active TRAC, VSC and Trailer Sway Control are turned off, the systems will not
turn on even when vehicle speed increases. ■
If the brake system overheats
The brake system may overheat . In this case, a buzzer w ill sound, and the TRAC OFF
indicator will flash, and Active TRAC and hill-s tart assist control will be temporarily inop-
erable. In this event, stop the vehicle immedi ately in a safe place, and allow the brake sys-
tem to cool down sufficiently until the TR AC OFF indicator goes off. (There is no
problem with continuing normal driving.) ■
Sounds and vibrations caused by the Multi Terrain AB S, brake assist, Active TRAC,
VSC, Trailer Sway Control, hill -start assist control and VGRS●
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 any of these systems. ●
Any of the following conditions may occur when the above systems are operating.
None of these indicates 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.
• The brake pedal may pulsate slightly af ter the Multi Terrain ABS is activated.
• The brake pedal may move down slightly after the Multi Terrain ABS is activated.■
Hill-start assist control is operational when ●
The shift lever is in D or S. ●
The brake pedal is not depressed. ■
VGRS is disabled in the following situations ●
During stopping or the steering wheel has been moved for a long time while driving at
lower speeds. ●
After the engine is restarted at less than -22°F (-30°C). ●
If you disconnect the battery with the steering wheel turned, the center position of the
steering wheel could be slightly and tempor ary changed. To initialize the VGRS, drive
for a short while.

LX570_OM_OM60Q78U_(U) 3814-5. Using the driving support systems
4
Driving WARNING ■
Replacing tires
Make sure that all tires are of the same si ze, brand, tread pattern and total load capac-
ity. In addition, make sure that the tires are inflated to the specified tire pressure level.
The Multi Terrain ABS, Active TRAC, VSC an d Trailer Sway Control will not function
correctly if different tires are fitted on the vehicle.
Contact your Lexus dealer for further in formation when replacing tires or wheels.■
Handling of tires and suspension
Using tires with any kind of problem or modi fying the suspension w ill affect the driving
assist systems, and may caus e the system to malfunction.■
Trailer Sway Control precaution
The Trailer Sway Control system is not able to reduce trailer sway in all situations.
Depending on many factors such as the condit ions of the vehicle, trailer, road surface,
and driving environment, the Trailer Sway Control system may not be effective. Refer to
your trailer owner’s manual for information on how to tow your trailer properly. ■
If trailer sway occurs
Observe the following precautions.
Failing to do so may cause death or serious injury. ●
Firmly grip the steering wh eel. Steer straight ahead.
Do not try to control trailer sway ing by turning the steering wheel.●
Begin releasing the accelerator pedal immediately but very gradually to reduce
speed.
Do not increase speed. Do not apply vehicle brakes.
If you make no extreme correction with the steering or brakes, your vehicle and trailer
should stabilize. ( → P. 201)

382
LX570_OM_OM60Q78U_(U) 4-6. Driving tips
Winter driving tips ●
Use fluids that are appropriate to the prevailing outside temperatures.
•Engine oil
• Engine coolant
• Washer fluid ●
Have a service technician inspect the condition of the battery. ●
Have the vehicle fitted with four snow tires or purchase a set of tire chains for
the rear tires.
*Ensure that all tires are the same size and br and, and that chains match the size of the
tires.
* : Tire chains cannot be mounted on vehicles with 21-inch tires
Perform the following according to the driving conditions: ●
Do not try to forcibly open a window or move a wiper that is frozen. Pour
warm water over the frozen area to me lt the ice. Wipe away the water imme-
diately to prevent it from freezing. ●
To ensure proper operation of the c limate control system fan, remove any
snow that has accumulated on the air inlet vents in front of the windshield. ●
Check for and remove any excess ice or snow that may have accumulated on
the exterior lights, vehicle’s roof, chassi s, around the tires or on the brakes.●
Remove any snow or mud from the bottom of your shoes before getting in the
vehicle.Carry out the necessary preparations an d inspections before driving the vehi-
cle in winter. Always drive the vehicle in a manner appropriate to the prevail-
ing weather conditions.
Pre-winter preparations
Before driving the vehicle

LX570_OM_OM60Q78U_(U) 3834-6. Driving tips
4
Driving Accelerate the vehicle slowly, keep a sa fe distance between you and the vehicle
ahead, and drive at a reduced spee d suitable to road conditions.●
Park the vehicle and move the shift lever to P without setting the parking
brake. The parking brake may freeze up, preventing it from being released. If
the vehicle is parked without setting the parking brake, make sure to block the
wheels.
Failure to do so may be dangerous because it may cause the vehicle to move
unexpectedly, possibly leading to an accident. ●
If the vehicle is parked without setting the parking brake, confirm that the shift
lever cannot be moved out of P
* .When the parking brake is in automatic mo de, release the parkin g brake after shifting
the shift lever to P. ( → P. 218)
* : The shift lever will be locked if it is attempted to be shif ted from P to any other position
without depressing the brake pedal. If the sh ift lever can be shifte d from P, there may
be a problem with the shift lock system. Have the vehicle inspected by your Lexus
dealer immediately. 
Vehicles with 20-inch tires
Use the correct tire chain size when mounting the snow chains.
Chain size is regulated for each tire size.
Side chain
(0.20 in. [5 mm] in diameter)
Cross chain
(0.25 in. [6.3 mm] in diameter) 
Vehicles with 21-inch tires
Tire chains cannot be mounted. Snow tires should be used instead.When driving the vehicle
When parking the vehicle
Selecting tire chains 1
2

LX570_OM_OM60Q78U_(U) 3894-6. Driving tips
4
Driving WARNING ■
Off-road driving precautions
Always observe the following precautions to minimize the risk of death, serious injury
or damage to your vehicle: ●
Drive carefully when off the road. Do not ta ke unnecessary risks by driving in danger-
ous places. ●
Do not grip the steering wheel spokes when driving off-road. A bad bump could jerk
the wheel and injure your hands. Keep both hands and especially your thumbs on the
outside of the rim. ●
Always check your brakes for effectiveness immediately after driving in sand, mud,
water or snow. ●
After driving through tall grass, mud, rock , sand, rivers, etc., check that there is no
grass, bush, paper, rags, stone, sand, etc. adhering or trapped on the underbody.
Clear off any such matter from the underbody. If the vehicle is used with these materi-
als trapped or adhering to the underbody, a breakdown or fire could occur. ●
When driving off-road or in rugged terrain , do not drive at excessive speeds, jump,
make sharp turns, strike obje cts, etc. This may cause loss of control or vehicle rollover
causing death or serious injury. You are also risking expensive damage to your vehi-
cle’s suspension and chassis.