2019 LEXUS UX200 brake sensor

2414-5. 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 th e RCTA function is
enabled or not ( P.227), if the Parking
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

2424-5. 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 he avily 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 othe r 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 el ectronic 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 vehicl es 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

2454-5. 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 Co ntrol 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. ( P.192)
■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.

2464-5. 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

3617-2. Steps to take in an emergency
7
When trouble arises
■Parking brake indicator
■Brake hold operated indicator (warning buzzer)
■Intuitive parking assist OFF indicator (warning buzzer)
■RCTA OFF indicator (warning buzzer)
Warning lightDetails/Actions
(flashes)(U.S.A.)
or
(flashes)
(Canada)
Indicates a malfunction in the parking brake system
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
(flashes)
Indicates a malfunction in the brake hold system
Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
(flashes)
(if equipped)
When a buzzer sounds:
Indicates a malfunctio n in the intuitive parking assist function
 Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information display.
(  P.222)
Warning lightDetails/Actions
(flashes)
(if equipped)
Indicates a malfunction in the RCTA (Rear Cross Traffic Alert) function
 Have the vehicle inspected by your Lexus dealer immediately.

3627-2. Steps to take in an emergency
■PKSB OFF indicator (warning buzzer)
■Low fuel level warning light
■Driver’s and front passenger’s seat belt reminder light (warning buzzer)*
*: Driver’s seat belt warning buzzer:
The driver’s seat belt warning buzzer sounds to al ert the driver that his or her seat belt is not
fastened. Once the engine switch is turned to ON the buzzer sounds for 6 seconds. If the
vehicle reaches a speed of 12 mph (20 km/h), the buzzer sounds once. If the seat belt is still
unfastened after 24 seco nds, the buzzer will sound intermitte ntly for 6 seconds. Then, if the
seat belt is still unfastened, the buzzer will sound in a different tone for 90 more seconds.
Front passenger’s seat belt warning buzzer:
The front passenger’s seat belt warning buzzer sounds to alert the front passenger that his
or her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of 12
mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will sound
intermittently for 6 seconds. Th en, if the seat belt is still unfastened, the buzzer will sound in
a different tone for 90 more seconds.
Warning lightDetails/Actions
(flashes)
(if equipped)
When a buzzer sounds:
Indicates a malfunction in the PK SB (Parking Support Brake) system
 Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information display.
(  P.367)
Warning lightDetails/Actions
Indicates that remaining fu el is approximately 1.9 gal. (7.1 L, 1.6 Imp.gal.)
or less
 Refuel the vehicle.
Warning lightDetails/Actions
Warns the driver and/or front passe nger to fasten their seat belts
 Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s seat
belt also needs to be fastened to make the warning light (warning
buzzer) turn off.

435What to do if... (Troubleshooting)
If you cannot release the shift lever
by depressing the brake pedal with
the engine switch in ON (P.157)
 It is locked automatically to prevent
theft of the vehicle. ( P.152)
 Is the window lock switch pressed?
The power window except for the
one at the driver’s seat cannot be
operated if the window lock switch
is pressed. ( P.136)
 The auto power off function will be
operated if the vehicle is left in ACC
or ON (the engine is not running)
for a period of time. ( P.154)
 The seat belt reminder light is flash-
ing
Are the driver and the front passen-
ger wearing the seat belts?
( P.362)
 The parking brake indicator is on
Is the parking brake released?
( P.160)
Depending on the situation, other types of warning buzzer may also
sound. (
P.358, 367)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm
sounds. ( P.64)
To stop the alarm, turn the engine switch to
ON or start the engine.
 Is the message displayed on the
multi-information display?
Check the message on the multi-
information display. ( P.367)
 When a warning light turns on or a
warning message is displayed, refer
to P.358, 367.
 Vehicles without spare tire: Slow
down the vehicle, drive with extra
caution, and take your vehicle to the
nearest Lexus dealer or authorized
tire dealer as soon as possible to
have the tire replaced. ( P.377)
The steering wheel cannot be
turned after the engine is
stopped
The windows do not open or
close by operating the power
window switches
The engine switch is turned off
automatically
A warning buzzer sounds during
drivingAn alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed
When a problem has occurred
If you have a flat tire

Alphabetical Index443
Multi-information display .............................79Audio system-linked display................... 83
Drive information 1/Drive information 2..............................................................................81
Driving information display........................81
Driving support system information dis- play ................................................................... 83
Dynamic radar cruise control with full- speed range .............................................. 204
Eco Driving Indicator ................................. 82
G-force.............................................................. 82
LTA (Lane-Tracing Assist) .................... 198
Menu icons ......................................................80
Meter control switches ................................81
Navigation system-linked display ........ 83
Pop-up display............................................... 79
Settings .............................................................. 84
Suggestion function.....................................85
Units .................................................................... 83
Warning messages .................................. 367
N
Navigation system-linked display... 83, 86
Noise from under vehicle ...............................6
O
Odometer ................................................. 73, 78
Odometer and trip meter display “ODO TRIP” switch ............................74, 78
Display items ...........................................73, 78
Pop-up display.......................................74, 78
“ODO TRIP” switch .............................. 74, 78
Oil Engine oil ....................................................... 392
Opener Back door............................................ 103, 105
Fuel filler door................................................178
Hood..................................................................319
Outside rear view mirrors .........................132 Adjustment...................................................... 132
BSM (Blind Spot Monitor) ..................... 214 Folding.............................................................. 133
Linked mirror functi
on when reversing
........................................................................... 133
Mirror position memory ...........................123
Outside rear view mirror defoggers263
RCTA function ............................................ 227
Outside temperature.............................72, 75
Overheating .................................................. 386
P
Paddle shift switches ......................... 157, 158
Panic mode ....................................................... 96
Parking assist sensors (intuitive parking assist) ............................................................. 220
Parking brake................................................. 160 Operation ....................................................... 160
Parking brake engaged warning buzzer............................................................................162
Warning light ................................................ 361
Warning message .......................................162
Parking lights Light switch .................................................... 165
Replacing light bulbs ................................346
Parking Support Brake function (rear- crossing vehicles) ........................... 231, 240Function ..........................................................240
Parking Support Brake function (static objects) ............................................... 231, 235Function ..........................................................235
PCS (Pre-Collision System) .................... 186 Function ........................................................... 186
PCS OFF switch ......................................... 188
Warning light ...............................................364
Personal lights................................................274
PKSA (Parking Support Alert) ................219
PKSB (Parking Support Brake)...............231 Warning message ..................................... 234
Power back door opener and closer ... 105
Power easy access system ........................123
Power outlets ................................................ 286
Power steering (Electric Power Steering system) .......................................................... 245