warning light LEXUS UX250H 2019 Workshop Manual

2154-5. Using the driving support systems
4
Driving
: Speed limit
: Do Not Enter
: Stop
: Yield
In the following situations, the RSA sys-
tem will alert the driver.
 When the vehicle speed exceeds
the speed warning threshold of the
speed limit sign displayed, the sign
display will be emphasized and a
buzzer will sound.
 When the RSA system recognizes a
do not enter sign and determines
that your vehicle has entered a no-
entry area, the displayed sign will
flash and a buzzer will sound.
Depending on the situation, traffic
environment (traffic direction, speed
unit) may be detected incorrectly and a
warning display may not operate prop-
erly.
■Setting procedure
1 Press or of the meter control
switches and select
2 Press or of the meter control
switches and select “Vehicle Settings”,
then press “OK” 3
Press or of the meter control
switches and select , then press
“OK”
4 Press or of the meter control
switches and select “RSA”, then press
“OK”
■Automatic turn-off of RSA sign display
In the following situations, a displayed
speed limit sign will stop being displayed
automatically:
●A new sign is not recognized for a certain
distance.
●The road changes due to a left or right
turn, etc.
In the following situations, do not enter, stop
and yield signs will stop being displayed
automatically:
●The system determines that your vehicle
has passed the sign.
●The road changes due to a left or right
turn, etc.
■Conditions in which the function may
not operate or detect correctly
In the following situations, RSA does not
operate normally and may not recognize
signs, display the incorrect sign, etc. How-
ever, this does not indicate a malfunction.
●The front camera is misaligned due to a
strong impact being applied to the sen-
sor, etc.
●Dirt, snow, stickers, etc. are on the wind-
shield near the front camera.
●In inclement weather such as heavy rain,
fog, snow or sand storms
●Light from an oncoming vehicle, the sun,
etc. enters the front camera.
●The sign is dirty, faded, tilted or bent.
●All or part of the sign is hidden by the
leaves of a tree, a pole, etc.
●The sign is only visible to the front camera
for a short amount of time.
●The driving scene (turning, lane change,
etc.) is judged incorrectly.
●Even if it is a sign not appropriate for the
Warning display

2194-5. Using the driving support systems
4
Driving
This mode employs a radar to detect the presence of vehicles up to approximately
328 ft. (100 m) ahead, determines the cu rrent vehicle-to-vehicle following dis-
tance, and operates to maintain a suitab le following distance from the vehicle
ahead. The desired vehicle-to-vehicle distance can also be set by operating the
vehicle-to-vehicle distance switch.
When driving on downhill slopes, the vehicl e-to-vehicle distance may become shorter.
Example of constant speed cruising
When there are no vehicles ahead
The vehicle travels at the speed set by the driver.
Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving slower than the set speed appears
When a vehicle is detected running ahead of you, the system automatically decelerates
your vehicle. When a greater reduction in vehicle speed is necessary, the system applies
the brakes (the stop lights will come on at this time). The sy stem will respond to changes in
the speed of the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by
the driver. Approach warning warns you when th e system cannot decelerate sufficiently to
prevent your vehicle from closing in on the vehicle ahead.
When the vehicle ahead of you stops, your vehi cle will also stop (vehicle is stopped by sys-
tem control). After the vehicle ahead starts off, pressing the “+RES” switch or depressing
the accelerator pedal (start-off operation) will resume follow-up cruising. If the start-off
operation is not performed, system contro l continues to keep your vehicle stopped.
When the turn signal lever is operated and your vehicle moves to a left lane while driving at
50 mph (80 km/h) or more, the vehicle will quickly accelerate to help to overtake a pass-
ing vehicle.
Example of acceleration
Driving in vehicle-to-vehicle distance control mode
A
B
C

2264-5. Using the driving support systems
*: If equipped
Multi-information display
The Blind Spot Monitor can be turned
on/off.
Outside rear view mirror indicators
When a vehicle is detected in a blind spot
of the outside rear view mirrors or
approaching rapidly from behind into a
blind spot, the outside rear view mirror
indicator on the detected side will illumi-
nate. If the turn signal lever is operated
toward the detected side, the outside rear
view mirror indicator flashes.
BSM indicator
Illuminates when the Blind Spot Monitor is
enabled
■Outside rear view mirror indicator visi-
bility
In strong sunlight, the outside rear view mir-
ror indicator may be difficult to see.
■When “Blind Spot Monitor Unavailable”
is shown on the multi-information dis-
play
Ice, snow, mud, etc., may be attached to the
rear bumper around the sensors. (P.227)
The system should return to normal opera-
tion after removing the ice, snow, mud, etc.
from the rear bumper. Additionally, the sen-
sors may not operate normally when driving
in extremely hot or cold environments.
■Customization
Some functions can be customized.
(  P.442)
BSM (Blind Spot Monitor)*
The Blind Spot Monitor is a system
that uses rear side radar sensors
installed on the inner side of the
rear bumper on the left and right
side to assist the driver in confirm-
ing safety when changing lanes.
WARNING
■Cautions regarding the use of the sys-
tem
The driver is solely responsible for safe
driving. Always driv e safely, taking care
to observe your surroundings.
The Blind Spot Monitor is a supplemen-
tary function which alerts the driver that a
vehicle is in a blind spot of the outside
rear view mirrors or is approaching rap-
idly from behind into a blind spot. Do not
overly rely on the Blind Spot Monitor. As
the function cannot judge if it is safe to
change lanes, over reliance could lead to
an accident resulting in death or serious
injury.
As the system may not function correctly
under certain conditions, the driver’s own
visual confirmation of safety is necessary.
System components
A
B
C

2284-5. Using the driving support systems
Use the meter control switches to turn
on/off the function (P.87).
1
Press or to select .
2
Press or to select and
then press “OK”.
WARNING
●Keep the sensors and the surrounding
areas on the rear bumper clean at all
times.
If a sensor or its surrounding area on the
rear bumper is dirty or covered with
snow, the Blind Spot Monitor may not
operate and a warning message
(  P.226) will be displaye d. In this situa-
tion, clear off the dirt or snow and drive
the vehicle with the operation conditions
of the BSM function ( P.230) satisfied
for approximately 10 minutes. If the
warning message does not disappear,
have the vehicle inspected by your Lexus
dealer.
●Do not attach stickers to the sensor or
surrounding area on the rear bumper.
●Do not subject a sensor or its sur-
rounding area on the rear bumper to a
strong impact.
If a sensor is moved even slightly off posi-
tion, the system may malfunction and
vehicles may not be detected correctly.
In the following situations, have your
vehicle inspected by your Lexus dealer.
• A sensor or its surrounding area is subject to a strong impact.
• If the surrounding area of a sensor is scratched or dented, or part of them
has become disconnected.
●Do not disassemb le the sensor.
●Do not modify the sensor or surround-
ing area on the rear bumper.
●Do not paint the rear bumper any
color other than an official Lexus color.
Turning the Blind Spot Monitor
on/off

2404-5. Using the driving support systems
■Outside rear view mirror indicator visi-
bility
In strong sunlight, the outside rear view mir-
ror indicator may be difficult to see.
■Hearing the RCTA buzzer
The RCTA buzzer may be difficult to hear
over loud noises, such as if the audio system
volume is high.
■When “Rear Cross Traffic Alert
Unavailable” is shown on the multi-
information display
Ice, water, snow, mud, etc., may be attached
to the rear bumper around the sensors.
(  P.228) Remove the ice, snow, mud, etc.,
attached to the rear bumper around the
sensors to return the function to normal.
Additionally, the function may not operate
normally when used in extremely hot or
cold environments.
■Rear side radar sensors
 P.228
■Operation of the RCTA function
The RCTA function uses rear side
radar sensors to detect vehicles
approaching from the right or left at the rear of the vehicle and alerts the
driver of the presence of such vehicles
by flashing the outside rear view mirror
indicators and sounding a buzzer.
Approaching vehicles
Detection areas of approaching
vehicles
■RCTA icon display
When a vehicle approaching from the
right or left at the rear of the vehicle is
detected, the following will be dis-
played on the Center Display.
 Example (Lexus parking assist mon-
itor): Vehicles are approaching from
both sides of the vehicle
■RCTA function detection areas
The areas that vehicles can be
detected in are outlined below.
WARNING
■Cautions regarding the use of the
function
The driver is solely responsible for safe
driving. Always driv e safely, taking care
to observe your surroundings.
The RCTA function is only a supplemen-
tary function which alerts the driver that a
vehicle is approaching from the right or
left at the rear of the vehicle. As the
RCTA function may not function cor-
rectly under certain conditions, the
driver’s own visual confirmation of safety
is necessary. Over reli ance on this func-
tion may lead to an accident resulting
death or serious injury.
RCTA function
A
B

2584-5. Using the driving support systems
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. ( P.204)
■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.
■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 hybrid
system is started or just after the vehicle
begins to move. This sound does not indi-
cate 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 malfunc-
tion 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.
■ECB operating sound
ECB operating sound may be heard in the
following cases, but it does not indicate that
a malfunction has occurred.
●Operating sound heard from the engine
compartment when the brake pedal is
operated.
●Motor sound of the brake system heard
from the front part of the vehicle when
the driver’s door is opened.
●Operating sound heard from the engine
compartment when one or two minutes
passed after the stop of the hybrid sys-
tem.
■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 power 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

2604-5. Using the driving support systems
WARNING
●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 the 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/ABS/VSC is acti-
vated
The slip indicator light flashes. Always
drive carefully. Re ckless 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.
■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 ti res 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 suspensi on will affect the
driving assist systems, and may cause a
system to malfunction.

2644-6. Driving tips
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. ( P.172)
 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 with out 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.
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
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 result ing in an accident.
Selecting tire chains
A
B

2815-3. Using the air conditioning system and defogger
5
Interior features
control screen (if equipped)
(P.288)
Adjust the left-hand side tempera-
ture setting
Adjust the fan speed setting
Adjust the right-hand side tem-
perature setting
Set cooling and dehumidification
function on/off
Adjust the temperature for the
driver’s and front passenger’s seats
separately (“DUAL” mode)
( P.283)
Select the air flow mode
■Windshield wiper de-icer (if equipped)
This feature is used to prevent ice from
building up on the wi ndshield and wiper
blades.
The windshield wiper de-icer will automati-
cally turn off after a period of time.
■Eco air conditioning mode
When Eco drive mode is selected using the
driving mode select switch, eco air condi-
tioning mode turns on.
When a driving mode other than Eco drive
mode is selected, eco air conditioning
mode may turn off.
1Press the automatic mode switch or
select “AUTO” on the sub function
menu. ( P.279)
2
Adjust the temperature setting.
3
To stop the operation, press the off
switch or select “Off” on the sub
function menu.
If the fan speed setting or air flow
modes are operated, the automatic
mode indicator goes off. However,
automatic mode for functions other
than that operated is maintained.
■Using automatic mode
Fan speed is adjusted automatically accord-
ing to the temperature setting and the
ambient conditions.
Therefore, the fan may stop for a while until
warm or cool air is ready to flow immedi-
ately after the automatic mode switch is
pressed or “AUTO” is selected.
Cool air may blow around the upper body
even when the heater is on due to sunlight.
■Windshield fog detection function
When automatic mode is set, the humidity
sensor detects fog on the windshield and
controls the air condit ioning system to pre-
vent fog.
WARNING
■To prevent burns (vehicles with wind-
shield wiper de-icer)
Do not touch the glass at lower part of
the windshield or to the side of the front
pillars when the wind shield wiper de-icer
is on.
B
C
D
E
F
G
Using automatic mode
NOTICE
■Humidity sensor
In order to detect fog on the windshield,
a sensor which monitors the temperature
of the windshield, the surround humidity,
etc., is installed.
Follow these points to avoid damaging
the sensor:
●Do not disassemble the sensor
●Do not spray the glass cleaner on the
sensor or subject it to strong impacts

2935-5. Using the storage features
5
Interior features
5-5.Using the storage features
Auxiliary tray/Wireless charger (if equipped) (P.303)
Glove box ( P.294)
Bottle holders ( P.295)
Cup holders ( P.294)
Console box ( P.294)
Coin holder ( P.295)
List of storage features
Location of the storage features
A
B
C
D
E
F
WARNING
■Items that should not be left in the
vehicle
Do not leave glasses, lighters or spray
cans in the storage spaces, as this may
cause the following when cabin tempera-
ture becomes high:
●Glasses may be deformed by heat or
cracked if they come into contact with
other stored items.
●Lighters or spray ca ns may explode. If
they come into contact with other
stored items, the lighter may catch fire
or the spray can may release gas,
causing a fire hazard.