LEXUS UX 200 (2019 year). Instruction — part 15
236
4-5. Using the driving support systems
■
When traveling at a low speed and
the brake pedal is not depressed,
or is depressed late
■
When the accelerator pedal is
depressed excessively
■
When the vehicle moves in the
unintended direction due to the
wrong shift position being selected
Types of sensors
WARNING
■
To ensure the Parking Support Brake
(static objects) can operate properly
Observe the following precautions
regarding the sensors (
P.220). Failure
to do so may cause a sensor to not oper-
ate properly, and may cause an accident.
●
Do not modify, disassemble or paint
the sensors.
●
Do not replace a sensor with a part
other than a genuine part.
●
Do not subject a sensor or its sur-
rounding area to a strong impact.
●
Do not damage the sensors, and
always keep them clean.
●
If the area around a radar sensor is
subjected to an impact, the system
may not operate properly due to a
sensor malfunction. Have the vehicle
inspected by your Lexus dealer.
237
4-5. Using the driving support systems
4
Driving
■
The Parking Support Brake function
(static object) will operate when
The function will operate when the PKSB
OFF indicator is not illuminated or flashing
(
P.69, 70) and all of the following condi-
tions are met:
●
Engine output restriction control
• The Parking Support Brake is enabled.
• The vehicle speed is 10 mph (15 km/h) or
less.
• There is a static object in the traveling
direction of the vehicle and 6 to 13 ft. (2
to 4 m) away.
• The Parking Support Brake determines
that a stronger-than-normal brake opera-
tion is necessary to avoid a collision.
●
Brake control
• Engine output restriction control is oper-
ating.
• The Parking Support Brake determines
that an immediate brake operation is nec-
essary to avoid a collision.
■
The Parking Support Brake function
(static objects) will stop operating when
The function will stop operating if any of the
following conditions are met:
●
Engine output restriction control
• The Parking Support Brake is disabled.
• The system determines that the collision
has become avoidable with normal brake
operation.
• The static object is no longer 6 to 13 ft. (2
to 4 m) away from the vehicle or in the
WARNING
■
Handling the suspension
Do not modify the suspension, as
changes to the height or inclination of the
vehicle may prevent the sensors from
detecting objects correctly or cause the
system to not operate or operate unnec-
essarily.
■
If the Parking Support Brake function
(static objects) operates unnecessar-
ily, such as at a railroad crossing
In the event that the Parking Support
Brake function (static objects) operates
unnecessarily, such as at a railroad cross-
ing, brake control will be canceled after
approximately 2 seconds, allowing you
to proceed forward and leave the area,
brake control can also be canceled by
depressing the brake pedal. Depressing
the accelerator pedal after brake control
is canceled will allow you to proceed for-
ward and leave the area.
■
Notes when washing the vehicle
Do not apply intensive bursts of water or
steam to the sensor area.
Doing so may result in the sensor mal-
functioning.
●
When using a high pressure washer to
wash the vehicle, do not spray the sen-
sors directly, as doing so may cause a
sensor to malfunction.
●
When using steam to clean the vehicle,
do not direct steam too close to the
sensors as doing so may cause a sen-
sor to malfunction.
■
When to disable the Parking Support
Brake (static objects)
In the following situations, disable the
Parking Support Brake (static objects) as
the system may operate even though
there is no possibility of a collision.
●
When inspecting the vehicle using a
chassis roller, chassis dynamo or free
roller
●
When loading the vehicle onto a boat,
truck or other transport vessel
●
If the suspension has been modified or
tires of a size other than specified are
installed
●
If the front of the vehicle is raised or
lowered due to the carried load
●
When equipment that may obstruct a
sensor is installed, such as a towing
eyelet, bumper protector (an addi-
tional trim strip, etc.), bicycle carrier, or
snow plow
●
When using an automatic car wash
238
4-5. Using the driving support systems
traveling direction of the vehicle.
●
Brake control
• The Parking Support Brake is disabled.
• Approximately 2 seconds have elapsed
since the vehicle was stopped by brake
control.
• The brake pedal is depressed after the
vehicle is stopped by brake control.
• The static object is no longer 6 to 13 ft. (2
to 4 m) away from the vehicle or in the
traveling direction of the vehicle.
■
Detection range of the Parking Support
Brake function (static objects)
The detection range of the Parking Support
Brake function (static objects) differs from
the detection range of the intuitive parking
assist. (
P.224) Therefore, even if the intui-
tive parking assist detects an object and
provides a warning, the Parking Support
Brake function (static objects) may not start
operating.
■
Objects that the Parking Support Brake
function (static objects) may not detect
The sensors may not be able to detect cer-
tain objects, such as the following:
●
Pedestrian
●
Cotton cloth, snow, and other materials
that are poor reflectors of ultrasonic
waves
●
Objects which are not perpendicular to
the ground, are not perpendicular to the
traveling direction of the vehicle, are
uneven or are waving
●
Low objects
●
Thin objects such as wires, fences, ropes
and signposts
●
Objects that are extremely close to the
bumper
■
Situations in which the Parking Support
Brake function (static objects) may not
operate
When driving with the shift lever in N
■
Intuitive parking assist buzzer
Regardless of whether the intuitive parking
assist function is enabled or not (
P.221), if
the Parking Support Brake function (static
objects) is enabled (
rear sensors detect an object and engine
output restriction control or brake control is
performed, the intuitive parking assist
buzzer will sound to notify the driver of the
approximate distance to the object.
■
Situations in which the Parking Support
Brake function (static objects) may
operate even if there is no possibility of a
collision
In some situations, such as the following, the
Parking Support Brake function (static
objects) may operate even though there is
no possibility of a collision.
●
Vehicle surroundings
• When driving on a narrow road
• When driving on a gravel road or in an
area with tall grass
• When driving toward a banner, flag, low-
hanging branch or boom barrier (such as
those used at railroad crossings, toll gates
and parking lots)
• When driving on a narrow path sur-
rounded by a structure, such as in a tun-
nel or on an iron bridge
• When parallel parking
• When there is a rut or hole in the surface
of the road
• When driving on a metal cover (grating),
such as those used for drainage ditches
• When driving on a steep slope
• If a sensor is hit by a large amount of
water, such as when driving on a flooded
road
239
4-5. Using the driving support systems
4
Driving
●
Weather
• If a sensor is covered with ice, snow, dirt,
etc. (when cleared, the system will return
to normal)
• If heavy rain or water strikes a sensor
• When driving in inclement weather such
as fog, snow or a sandstorm
●
Other ultrasonic wave sources
• When vehicle horns, vehicle detectors,
motorcycle engines, air brakes of large
vehicles, the clearance sonar of other
vehicles or other devices which produce
ultrasonic waves are near the vehicle
• If a sticker or an electronic component,
such as a backlit license plate (especially
fluorescent type), fog lights, fender pole
or wireless antenna is installed near a
sensor
●
Changes in the vehicle posture
• If the vehicle is significantly tilted
• If the front of the vehicle is raised or low-
ered due to the carried load
• If the orientation of a sensor has been
changed due to a collision or other
impact
■
Situations in which the Parking Support
Brake function (static objects) may not
operate properly
In some situations, such as the following, this
function may not operate properly.
●
Weather
• When a sensor or the area around a sen-
sor is extremely hot or cold
• When strong winds are blowing
• If a sensor is covered with ice, snow, dirt,
etc. (when cleared, the system will return
to normal)
• If heavy rain or water strikes a sensor
• When driving in inclement weather such
as fog, snow or a sandstorm
●
Vehicle surroundings
• When an object that cannot be detected
is between the vehicle and a detected
object
• If an object such as a vehicle, motorcycle,
bicycle or pedestrian cuts in front of the
vehicle or runs out from the side of the
vehicle
●
Other ultrasonic waves sources
• When vehicle horns, vehicle detectors,
motorcycle engines, air brakes of large
vehicles, the clearance sonar of other
vehicles or other devices which produce
ultrasonic waves are near the vehicle
• If a sticker or an electronic component,
such as a backlit license plate (especially
fluorescent type), fog lights, fender pole
or wireless antenna is installed near a
sensor
●
Changes in the vehicle posture
• If the vehicle is significantly tilted
• If the front of the vehicle is raised or low-
ered due to the carried load
• If the orientation of a sensor has been
changed due to a collision or other
impact
240
4-5. Using the driving support systems
*
: If equipped
This function will operate in situations
such as the following if a vehicle is
detected in the traveling direction of
the vehicle.
■
When reversing, a vehicle is
approaching and the brake pedal is
not depressed, or is depressed late
■
The Parking Support Brake function
(rear-crossing vehicles) will operate
when
The function will operate when the PKSB
OFF indicator is not illuminated or flashing
(
P.69, 70) and all of the following condi-
tions are met:
●
Engine output restriction control
• The Parking Support Brake is enabled.
• The vehicle speed is 10 mph (15 km/h) or
less.
• Vehicles which are approaching from the
right or left at the rear of the vehicle at a
traveling speed of more than approxi-
mately 5 mph (8 km/h)
• The shift lever is in R.
• The Parking Support Brake determines
that a stronger than normal brake opera-
tion is necessary to avoid a collision with
Parking Support Brake func-
tion (rear-crossing vehicles)
*
If a rear radar sensor detects a vehi-
cle approaching from the right or
left at the rear of the vehicle and the
system determines that the possi-
bility of a collision is high, this func-
tion will perform brake control to
reduce the likelihood of an impact
with the approaching vehicle.
Examples of function operation
Types of sensors
WARNING
■
To ensure the Parking Support Brake
(rear-crossing vehicles) can operate
properly
Observe the following precautions
regarding the rear radar sensors
(
P.216). Failure to do so may cause a
sensor to not operate properly, and may
cause an accident.
●
Do not modify, disassemble or paint
the sensors.
●
Do not replace a rear radar sensor
with a part other than a genuine part.
●
Do not damage the rear radar sensors,
and always keep the radar sensors and
their surrounding area on the bumper
clean.
■
To prevent a rear radar sensor from
malfunctioning
●
If the area around a rear radar sensor
is subjected to an impact, the system
may not operate properly due to a
sensor malfunction. Have the vehicle
inspected by your Lexus dealer.
●
Observe the rear radar sensor han-
dling precautions. (
241
4-5. Using the driving support systems
4
Driving
an approaching vehicle.
●
Brake control
• Engine output restriction control is oper-
ating
• The Parking Support Brake determines
that an emergency brake operation is
necessary to avoid a collision with an
approaching vehicle.
■
The Parking Support Brake function
(rear-crossing vehicles) will stop operat-
ing when
The function will stop operating if any of the
following conditions are met:
●
Engine output restriction control
• The Parking Support Brake is disabled.
• The collision becomes avoidable with
normal brake operation.
• A vehicle is no longer approaching from
the right or left at the rear of the vehicle.
●
Brake control
• The Parking Support Brake is disabled.
• Approximately 2 seconds have elapsed
since the vehicle was stopped by brake
control.
• The brake pedal is depressed after the
vehicle is stopped by brake control.
• A vehicle is no longer approaching from
the right or left at the rear of the vehicle.
■
Detection area of the Parking Support
Brake function (rear-crossing vehicles)
The detection area of the Parking Support
Brake function (rear-crossing vehicles) dif-
fers from the detection area of the RCTA
function (
P.228). Therefore, even if the
RCTA function detects a vehicle and pro-
vides an alert, the Parking Support Brake
function (rear-crossing vehicles) may not
start operating.
■
Conditions under which the Parking
Support Brake function (rear-crossing
vehicles) will not detect a vehicle
The Parking Support Brake function (rear-
crossing vehicles) is not designed to detect
the following types of vehicles and/or
objects:
●
Vehicles approaching from directly
behind
●
Vehicles backing up in a parking space
next to your vehicle
●
Vehicles that the sensors cannot detect
due to obstructions
●
Vehicles which suddenly accelerate or
decelerate near your vehicle
●
Guardrails, walls, signs, parked vehicles
and similar stationary objects
*
●
Small motorcycles, bicycles, pedestrians,
etc.
*
●
Vehicles moving away from your vehicle
●
Vehicles approaching from the parking
spaces next to your vehicle
*
●
Objects which are extremely close to a
radar sensor
*
●
Vehicles which are approaching from the
right or left at the rear of the vehicle at a
traveling speed of less than approxi-
mately 5 mph (8 km/h)
●
Vehicles which are approaching from the
right or left at the rear of the vehicle at a
traveling speed of more than approxi-
mately 15 mph (24 km/h)
*
: Depending on the conditions, detection
of a vehicle and/or object may occur.
■
RCTA buzzer
Regardless of whether the RCTA function is
enabled or not (
Support Brake function is enabled
(
P.232) and brake control is performed,
a buzzer will sound to notify the driver.
■
Situations in which the system may
operate even though there is no possi-
bility of a collision
In some situations such as the following, the
Parking Support Brake function (rear-
crossing vehicles) may operate even
though there is no possibility of a collision.
●
When the parking space faces a street
242
4-5. Using the driving support systems
and vehicles are being driven on the
street
●
When a detected vehicle turns while
approaching the vehicle
●
When a vehicle passes by the side of your
vehicle
●
When the distance between your vehicle
and metal objects, such as a guardrail,
wall, sign, or parked vehicle, which may
reflect electrical waves toward the rear of
the vehicle, is short
●
When there are spinning objects near
your vehicle such as the fan of an air con-
ditioning unit
●
When water is splashed or sprayed
toward the rear bumper, such as from a
sprinkler
■
Situations in which the Parking Support
Brake function (rear-crossing vehicles)
may not operate properly
In some situations, such as the following, the
radar sensors may not detect an object and
this function may not operate properly
●
Stationary objects
●
When a sensor or the area around a sen-
sor is extremely hot or cold
●
If the rear bumper is covered with ice,
snow, dirt, etc.
●
When it is raining heavily or water strikes
the vehicle
●
When the detection area of a radar sen-
sor is obstructed by an adjacent vehicle
●
If the vehicle is significantly tilted
●
When equipment that may obstruct a
sensor is installed, such as a towing eye-
let, bumper protector (an additional trim
strip, etc.), bicycle carrier, or snow plow
●
If the suspension has been modified or
tires of a size other than specified are
installed
●
If the front of the vehicle is raised or low-
ered due to the carried load
●
If a sticker or an electronic component,
such as a backlit license plate (especially
fluorescent type), fog lights, fender pole
or wireless antenna is installed near a
radar sensor
●
If the orientation of a radar sensor has
been changed
●
When multiple vehicles are approaching
with only a small gap between each vehi-
cle
●
If a vehicle is approaching the rear of
your vehicle rapidly
●
Situations in which the radar sensor may
not detect a vehicle
• When a vehicle approaches from the
right or left at the rear of the vehicle while
you are turning while backing up
• When turning while backing up
243
4-5. Using the driving support systems
4
Driving
• When backing out of a shallow angle
parking spot
• When backing up on a slope with a sharp
change in grade
• When a vehicle turns into the detection
area
Except F SPORT models
F SPORT models
1
Normal mode
Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
Press the switch to change the Normal
mode when not in Normal mode.
2
Eco drive mode
Helps the driver accelerate in an eco-
friendly manner and improve fuel economy
through moderate throttle characteristics
and by controlling the operation of the air
conditioning system (heating/cooling).
When not in Eco drive mode, if the driving
mode select switch is turned toward you,
Driving mode select switch
The driving modes can be selected
to suit driving condition.
Selecting the driving mode
A
B
244
4-5. Using the driving support systems
the “Eco” indicator comes on.
3
Sport mode
Assists acceleration response by con-
trolling the transmission, engine and steer-
ing. Suitable for when precise handling is
desirable, for example when driving on
mountain roads.
When not in Sport mode, if the driving
mode select switch is turned backward, the
“Sport” indicator comes on.
■
Operation of the air conditioning sys-
tem in Eco drive mode
Eco drive mode controls the heating/cool-
ing operations and fan speed of the air con-
ditioning system to enhance fuel efficiency.
To improve air conditioning performance,
perform the following operations:
●
Turn off eco air conditioning mode
(
●
Adjust the fan speed (
●
Turn off Eco drive mode
■
Automatic deactivation of Sport mode
If the engine switch is turned off after driv-
ing in Sport mode, the driving mode will be
changed to Normal mode.
■
Driving mode pop-up display (vehicles
with 10.3-inch display model)
When the driving mode is changed, the
selected driving mode will be temporarily
displayed on the side display. (
■
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
■
Brake assist
Generates an increased level of brak-
ing 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
■
Enhanced VSC (Enhanced Vehi-
cle Stability Control)
Provides cooperative control of the
ABS, TRAC, VSC and EPS.
Helps to maintain directional stability
when swerving on slippery road sur-
faces by controlling steering perfor-
mance.
Driving assist systems
To keep driving safety and perfor-
mance, the following systems oper-
ate automatically in response to
various driving situations. Be aware,
however, that these systems are
supplementary and should not be
relied upon too heavily when oper-
ating the vehicle.
Summary of the driving assist
systems
245
4-5. Using the driving support systems
4
Driving
■
Secondary Collision Brake
When the airbag sensor detects a colli-
sion, the brakes and brake lights are
automatically controlled to reduce the
vehicle speed and that helps reduce
the possibility of further damage due to
a secondary collision
■
TRAC (Traction Control)
Helps to maintain drive power and pre-
vent the drive wheels from spinning
when starting the vehicle or accelerat-
ing on slippery roads
■
Active Cornering Assist (ACA)
Helps to prevent the vehicle from drift-
ing to the outer side by performing
inner wheel brake control when
attempting to accelerate during cor-
nering
■
Hill-start assist control
Helps to reduce the backward move-
ment of the vehicle when starting on an
uphill
■
EPS (Electric Power Steering)
Employs an electric motor to reduce
the amount of effort needed to turn the
steering wheel
■
When the TRAC/VSC systems are
operating
The slip indicator light will flash while the
TRAC/VSC systems are operating.
■
Disabling the TRAC system
If the vehicle gets stuck in mud, dirt or snow,
the TRAC system may reduce power from
the engine to the wheels. Pressing the
switch to turn the system off may
make it easier for you to rock the vehicle in
order to free it.
To turn the TRAC system off, quickly press
and release the
switch.
The “Traction Control Turned Off” will be
shown on the multi-information display.
Press the
switch again to turn the sys-
tem back on.
■
Disabling both TRAC and VSC systems
To turn the TRAC and VSC systems off,
press and hold the
switch for more
than 3 seconds while the vehicle is stopped.
The VSC OFF indicator light will come on
and the “Traction Control Turned Off” will
be shown on the multi-information display.
*
Press the
switch again to turn the sys-
tem back on.
*
: Pre-collision brake assist and pre-colli-
sion braking will also be disabled. The
PCS warning light will come on and the
message will be shown on the multi-infor-
mation display. (
■
When the message is displayed on the
multi-information display showing that
TRAC has been disabled even if the
switch has not been pressed
TRAC is temporary deactivated. If the infor-
mation continues to show, contact your
Lexus dealer.
246
4-5. Using the driving support systems
■
Operating conditions of hill-start assist
control
When the following four conditions are met,
the hill-start assist control will operate:
●
The shift lever is in a position other than P
or N (when starting off forward/back-
ward on an upward incline).
●
The vehicle is stopped.
●
The accelerator pedal is not depressed.
●
The parking brake is not engaged.
■
Automatic system cancelation of hill-
start assist control
The hill-start assist control will turn off in any
of the following situations:
●
The shift lever is shifted to P or N.
●
The accelerator pedal is depressed.
●
The parking brake is engaged.
●
2 seconds at maximum elapsed after the
brake pedal is released
■
Sounds and vibrations caused by the
ABS, brake assist, VSC, TRAC and hill-
start assist control systems
●
A sound may be heard from the engine
compartment when the brake pedal is
depressed repeatedly, 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
occur when the above systems are oper-
ating. None of these indicates that a mal-
function has occurred.
• Vibrations may be felt through the vehicle
body and steering.
• A motor sound may be heard also after
the vehicle comes to a stop.
• The brake pedal may pulsate slightly after
the ABS is activated.
• The brake pedal may move down slightly
after the ABS is activated.
■
Active Cornering Assist operation
sounds and vibrations
When Active Cornering Assist is operated,
operation sounds and vibrations may be
generated from the brake system, but this is
not a malfunction.
■
EPS operation sound
When the steering wheel is operated, a
motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
■
Automatic reactivation of TRAC and
VSC systems
After turning the TRAC and VSC systems
off, the systems will be automatically re-
enabled in the following situations:
●
When the engine switch is turned off
●
If only the TRAC system is turned off, the
TRAC will turn on when vehicle speed
increases. If both the TRAC and VSC
systems are turned off, automatic re-
enabling will not occur when vehicle
speed increases.
■
Secondary Collision Brake operating
conditions
The vehicle speed is approximately 6 mph
(10 km/h) or more and the airbag sensor
detects a collision. (The Secondary Colli-
sion Brake will not operate when the vehicle
speed is below approximately 6 mph [10
km/h].)
■
Secondary Collision Brake automatic
cancellation
The Secondary Collision Brake is automati-
cally canceled in the following situations.
●
The vehicle speed drops below approxi-
mately 6 mph (10 km/h)
●
A certain amount of time elapses during
operation
●
The accelerator pedal is depressed a
large amount
■
Operating conditions of Active Corner-
ing Assist
The system operates in the following situa-
tions.
●
TRAC/VSC can operate
●
The system determines that the vehicle is
drifting to the outer side when attempting
to accelerate during cornering
●
The brake pedal is released
■
Reduced effectiveness of the EPS sys-
tem
The effectiveness of the EPS system is
247
4-5. Using the driving support systems
4
Driving
reduced to prevent the system from over-
heating when there is frequent steering
input over an extended period of time. The
steering wheel may feel heavy as a result.
Should this occur, refrain from excessive
steering input or stop the vehicle and turn
the engine off. The EPS system should
return to normal within 10 minutes.
WARNING
■
The ABS does not operate effectively
when
●
The limits of tire gripping performance
have been exceeded (such as exces-
sively worn tires on a snow covered
road).
●
The vehicle hydroplanes while driving
at high speed on wet or slick roads.
■
Stopping distance when the ABS is
operating may exceed that of normal
conditions
The ABS is not designed to shorten the
vehicle’s stopping distance. Always main-
tain a safe distance from the vehicle in
front of you, especially in the following
situations:
●
When driving on dirt, gravel or snow-
covered roads
●
When driving with tire chains
●
When driving over bumps in the road
●
When driving over roads with potholes
or uneven surfaces
■
TRAC/VSC may not operate effec-
tively when
Directional control and power may not
be achievable while driving on slippery
road surfaces, even if the TRAC/VSC
system is operating.
Drive the vehicle carefully in conditions
where stability and power may be lost.
■
Active Cornering Assist does not
operate effectively when
●
Do not rely solely upon Active Cor-
nering Assist. Active Cornering Assist
may not operate effectively when
accelerating down slopes or driving on
slippery road surfaces.
●
When Active Cornering Assist fre-
quently operates, Active Cornering
Assist may temporarily stop operating
to ensure proper operation of the
brakes, TRAC, VSC.
■
Hill-start assist control does not oper-
ate effectively when
●
Do not overly rely on hill-start assist
control. Hill-start assist control may
not operate effectively on steep
inclines and roads covered with ice.
●
Unlike the parking brake, hill-start
assist control is not intended to hold
the vehicle stationary for an extended
period of time. Do not attempt to use
hill-start assist control to hold the vehi-
cle on an incline, as doing so may lead
to an accident.
■
When the TRAC/VSC is activated
The slip indicator light flashes. Always
drive carefully. Reckless driving may
cause an accident. Exercise particular
care when the indicator light flashes.
■
When the TRAC/VSC systems are
turned off
Be especially careful and drive at a speed
appropriate to the road conditions. As
these are the systems to help ensure
vehicle stability and driving force, do not
turn the TRAC/VSC systems off unless
necessary.
248
4-5. Using the driving support systems
WARNING
■
Secondary Collision Brake
Do not overly rely on the Secondary Col-
lision Brake. This system is designed to
help reduce the possibility of further
damage due to a secondary collision,
however, that effect changes according
to various conditions. Overly relying on
the system may result in death or serious
injury.
■
Replacing tires
Make sure that all tires are of the speci-
fied size, brand, tread pattern and total
load capacity. In addition, make sure that
the tires are inflated to the recom-
mended tire inflation pressure level.
The ABS, TRAC and VSC systems will
not function correctly if different tires are
installed on the vehicle.
Contact your Lexus dealer for further
information when replacing tires or
wheels.
■
Handling of tires and the suspension
Using tires with any kind of problem or
modifying the suspension will affect the
driving assist systems, and may cause a
system to malfunction.
249
4-6. Driving tips
4
Driving
4-6.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.
Vehicles without run-flat tires: Have
the vehicle fitted with four snow tires
or purchase a set of tire chains for
the front tires.
Ensure that all tires are the same size and
brand, and that chains match the size of the
tires.
Vehicles with run-flat tires: It is rec-
ommended that the vehicle is fitted
with four snow run-flat tires or pur-
chase a set of tire chains for the front
tires.
Ensure that all tires are the same size and
brand, and that chains match the size of the
tires.
Winter driving tips
Carry out the necessary prepara-
tions and inspections before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.
Preparation for winter
WARNING
■
Driving with snow tires
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in a loss of
vehicle control and cause death or seri-
ous injury.
●
Use tires of the specified size.
●
Maintain the recommended level of air
pressure.
●
Do not drive in excess of 75 mph (120
km/h), regardless of the type of snow
tires being used.
●
Use snow tires on all, not just some
wheels.
■
Driving with tire chains
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in the vehicle
being unable to be driven safely, and may
cause death or serious injury.
●
Do not drive in excess of the speed
limit specified for the tire chains being
used, or 30 mph (50 km/h), which-
ever is lower.
●
Avoid driving on bumpy road surfaces
or over potholes.
●
Avoid sudden acceleration, abrupt
steering, sudden braking and shifting
operations that cause sudden engine
braking.
●
Slow down sufficiently before entering
a curve to ensure that vehicle control is
maintained.
●
Do not use LTA (Lane Tracing Assist).
250
4-6. Driving tips
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
melt the ice. Wipe away the water
immediately to prevent it from
freezing.
To ensure proper operation of the
climate 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 accumu-
lated on the exterior lights, vehicle’s
roof, chassis, around the tires or on
the brakes.
Remove any snow or mud from the
bottom of your shoes before getting
in the vehicle.
Accelerate the vehicle slowly, keep a
safe distance between you and the
vehicle ahead, and drive at a reduced
speed suitable to road conditions.
Park the vehicle and move the shift
lever to P without setting the park-
ing 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 lead-
ing to an accident.
When the parking brake is in automatic
mode, release the parking brake after shift-
ing the shift lever to P. (
If the vehicle is left parked with the
brakes damp in cold temperatures,
there is a possibility of the brakes
freezing.
If the vehicle is parked without set-
ting the parking brake, confirm that
the shift lever cannot be moved out
of P
*
.
*
: The shift lever will be locked if it is
attempted to be shifted from P to any
other position without depressing the
brake pedal. If the shift lever can be
shifted from P, there may be a problem
with the shift lock system. Have the vehi-
cle inspected by your Lexus dealer
immediately.
NOTICE
■
Repairing or replacing snow tires
Request repairs or replacement of snow
tires from Lexus dealers or legitimate tire
retailers.
This is because the removal and attach-
ment of snow tires affects the operation
of the tire pressure warning valves and
transmitters.
Before driving the vehicle
When driving the vehicle
When parking the vehicle
WARNING
■
When parking the vehicle
When parking the vehicle without apply-
ing the parking brake, make sure to
chock the wheels. If you do not chock the
wheels, the vehicle may move unexpect-
edly, possibly resulting in an accident.
251
4-6. Driving tips
4
Driving
Use the correct tire chain size when
mounting the tire chains. Chain size is
regulated for each tire size.
Side chain:
0.12 in. (3 mm) in diameter
0.39 in. (10 mm) in width
0.98 in. (25 mm) in length
Cross chain:
0.16 in. (4 mm) in diameter
0.55 in. (14 mm) in width
0.98 in. (25 mm) in length
Regulations regarding the use of tire
chains vary depending on location and
type of road. Always check local regu-
lations before installing chains.
■
Tire chain installation
Observe the following precautions when
installing and removing chains:
●
Install and remove tire chains in a safe
location.
●
Install tire chains on the front tires only.
Do not install tire chains on the rear tires.
●
Install tire chains on front tires as tightly as
possible. Retighten chains after driving
1/4 - 1/2 mile (0.5 - 1.0 km).
●
Install tire chains following the instruc-
tions provided with the tire chains.
To enable the windshield wipers to be
lifted when heavy snow or icy condi-
tions are expected, change the rest
position of the windshield wipers from
the retracted position below the hood
to the service position using the wiper
lever. (
Selecting tire chains
Regulations on the use of tire
chains
A
B
C
D
E
F
NOTICE
■
Fitting tire chains
The tire pressure warning valves and
transmitters may not function correctly
when tire chains are fitted.
Windshield wipers
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