2015 LEXUS LX570 Owners Manual

3532-4. Using other driving systems
2
When driving
LX570_OM_OM60L96U_(U) ■
Sounds and vibrations caused by the Multi Terrain ABS, 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 sound does not indicate that
a malfunction has occurred in any of these systems. ●
Any of the following conditions may oc cur when the above systems are operat-
ing. 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 after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the Multi Terrain ABS is activated.
• The brake pedal may move down slightly after the Multi Terrain ABS is acti-
vated.■
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 temporary changed. To initialize the
VGRS, drive for a short while.

3542-4. Using other driving systems
LX570_OM_OM60L96U_(U) CAUTIONAny of the following conditions may result in an accident which could cause death or
serious injury: ■
The Multi Terrain ABS does not operate effectively when ●
The limits of tire gripping performance have been exceeded (such as excessively
worn tires on a sn ow covered road).●
The vehicle hydroplanes while driving at high speed on a wet or slick road.■
Stopping distance when the Multi Terrain ABS is operating may exceed that of
normal conditions
The Multi Terrain ABS is not designed to shorten the vehicle’s stopping distance.
Always maintain a safe distance from the vehi cle in front of you, especially in the fol-
lowing situations. ●
When driving on dirt, grav el or snow-covered roads●
When driving with tire chains ●
When driving over bumps in the road ●
When driving over roads with potholes or uneven roads■
Active TRAC may not operate effectively when
Directional control and power may not be achievable whil e driving on slippery road
surfaces, even if the Active TRAC is operating.
Do not drive the vehicle in conditions where stability and power may be lost. ■
If the hill-start assist control does not operate effectively
Do not overly rely on the hill-start assist control. The hill-start assist control may not
operate effectively on steep inclines and roads covered in ice.

3552-4. Using other driving systems
2
When driving
LX570_OM_OM60L96U_(U) CAUTION■
When Active TRAC, VSC and Trailer Sway Control are off
Be especially careful and drive at a speed appropriate to the road conditions. As
these are systems to help to ensure vehicle stability and driving force, do not turn off
Active TRAC, VSC and Trailer Sway Control unless necessary. ■
When the VSC and Trailer Sway Control are activated
The slip indicator light flashes. Always drive carefully.
Reckless driving may cause an accident. Exercise particular care when the indica-
tor light flashes. ■
Replacing tires
Make sure that all tires ar e of the same size, brand, tread pattern and total load
capacity. In addition, make sure that the ti res are inflated to the specified tire pres-
sure level.
The Multi Terrain ABS, Active TRAC, VSC and Trailer Sway Control will not func-
tion correctly if different tire s are fitted on the vehicle.
Contact your Lexus dealer for further info rmation when replacin g tires or wheels.■
Handling of tires and suspension
Using tires with any kind of problem or mod ifying the suspension wi ll affect the driv-
ing assist systems, and may ca use the system to malfunction.

3562-4. Using other driving systems
LX570_OM_OM60L96U_(U) CAUTION■
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 cond itions of the vehicle, trailer, road sur-
face, and driving environment, the Trailer Sway Control system may not be effec-
tive. Refer to your trailer ow ner’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 swaying 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. 397)

3572-4. Using other driving systems
2
When driving
LX570_OM_OM60L96U_(U) Pre-Collision System 
 : If equippedWhen the radar sensor detects possibilit y of a frontal collision, the pre-col-
lision systems such as the brakes and seat belts are automatically engaged
to lessen impact as well as vehicle damage.
■ Pre-collision seat belts (front seats only) If the pre-collision sensor detects that a collision is unavoidable, the pre-
collision system will retract the seat belt before the collision occurs.
The same will happen if the driver makes an emergency braking or loses
control of the vehicle. (  P. 94)
However, when the VSC system is disabled, the system will not operate in
the event of skidding.
■ Pre-collision brake assist When there is a high possibility of a frontal collision, the system applies
greater braking force in relation to how strongly the brake pedal is
depressed. The system may not warn the driver using a warning light,
warning display and buzzer when the system detects and judges braking
operations.
■ AVS control When the system determines that there is a high possibility of a frontal col-
lision, the AVS optimizes the damping effect. (  P. 331)

3582-4. Using other driving systems
LX570_OM_OM60L96U_(U) Radar sensor
Detects vehicles or other obsta-
cles on or near the road ahead and
determines whether a collision is
imminent based on the position,
speed, and heading of the obsta-
cles.When traveling on a road with very light traffic and very little to reflect the radar
waves emitted by the radar sensor, the system may decide that the radar sensor
is dirty, even if the sensor is not actually dirty. The system will automatically
restore itself when reflecte d radar waves are detected.■
Obstacles not detected
The sensor cannot detect plastic obstacles such as pylons. There may also be occa-
sions when the radar sensor cannot detect pedestrians, animals, bicycles, motorcy-
cles, trees, or snowdrifts. ■
The pre-collision system is operational when ●
Pre-collision seat belts (situation 1)
• Vehicle speed is greater than about 4 mph (5 km/h).
• The speed at which your vehicle is ap proaching the obstacle or the vehicle
running ahead of you is greate r than about 19 mph (30 km/h).
• The front occupants are wearing a seat belt. ●
Pre-collision seat belts (situation 2)
• Vehicle speed is greater than about 19 mph (30 km/h).
• The system detects sudd en braking or skidding.
• The front occupants are wearing a seat belt.

3592-4. Using other driving systems
2
When driving
LX570_OM_OM60L96U_(U) ●
Pre-collision brake assist
• Vehicle speed is greater than about 19 mph (30 km/h).
• The speed at which your vehicle is ap proaching the obstacle or the vehicle
running ahead of you is greate r than about 19 mph (30 km/h).
• The brake pedal is depressed. ●
AVS
• Vehicle speed is greater than about 4 mph (5 km/h).
• The speed at which your vehicle is ap proaching the obstacle or the vehicle
running ahead of you is greate r than about 19 mph (30 km/h).■
Conditions that may trigger the system even if there is no possibility of collision●
When there is an object by the roadside at the entrance to a curve ●
When passing an oncoming vehicle on a curve ●
When driving over a narrow iron bridge ●
When there is a metal object on the road surface ●
When driving on an uneven road surface (nose up, nose down)●
When passing an oncoming vehicle on a left-turn●
When your vehicle rapidly clos es on the vehicle in front●
When a grade separation/interchange, sign, billboard, or other structure
appears to be directly in the vehicle’s line of travel ●
When climbing a steep hill causes an overhead billboard or other metallic
structure to appear directly in the vehicle’s line of travel ●
When an extreme change in vehicle height occurs ●
When the axis of the radar is out of adjustment ●
When passing through certain toll gates●
When passing through an overpass ●
When passing through a tunnel
When the system is activated in the situations described above there is also a possi-
bility that the seat belts will retract quic kly and the brakes will be applied with a
force greater than normal. When the seat be lt is locked in the retracted position,
stop the vehicle in a safe place, release the seat belt and refasten.

3602-4. Using other driving systems
LX570_OM_OM60L96U_(U) ■
Situations in which the pre-collision system does not function properly
The system may not function effectively in situations such as the following: ●
On roads with sharp bends or uneven surfaces ●
If a vehicle suddenly moves in front of your vehicle, such as at an intersection ●
If a vehicle suddenly cuts in front of your vehicle, such as when overtaking●
In inclement weather such as heavy rain, fog, snow or sand storms ●
When your vehicle is skidding such as the VSC system off●
When your vehicle is steeply inclined ●
When the axis of the radar is out of adjustment■
Automatic cancelation of the pre-collision system
When a malfunction occurs due to sensor contamination, etc. that results in the
sensors being unable to detect obstacles, the pre-collision system will be automati-
cally disabled. In this case, th e system will not activate even if there is a collision pos-
sibility. ■
When there is a malfunction in the system, or if the system is temporarily unus-
able
Warning lights and/or warning messa ges will turn on or flash. (  P. 826, 837)