2019 LEXUS UX250H run

3997-2. Steps to take in an emergency
7
When trouble arises
form the procedure on P.365 to clean
them.
• If the warning message is shown when
the air intake vent and filter of the hybrid
battery (traction battery) are not dirty,
have the vehicle inspected by your Lexus
dealer.
Take your vehicle to the nearest Lexus
dealer or authorized tire dealer as
soon as possible if any tire goes flat.
The vehicle can be driven for a maximum
of 100 miles (160 km) at a speed below 50
mph (80 km/h) after the tire pressure
warning light comes on. ( P.387)
A run-flat tire has a mark on the
side wall.
■In some condition (such as at high tem-
peratures)
You cannot continue dr iving for up to 100
miles (160 km).
■For the detailed information on run-flat
tires
 P.347
NOTICE
■If “High Power Consumption Power
to Climate Temporarily Limited” is
displayed frequently
There is a possible malfunction relating
to the charging system or the 12-volt bat-
tery may be deteriorating. Have the vehi-
cle inspected by your Lexus dealer.
■If “Low Auxiliary Battery” is displayed
frequently
The 12-volt battery may have deterio-
rated. As the battery may discharge in
this state when left unattended, have the
battery inspected by your Lexus dealer.
If you have a flat tire
Your vehicle is not equipped with a
spare tire, but instead you can con-
tinue driving the vehicle with run-
flat tires even if any tire goes flat.
In this case, slow down and drive
with extra caution.
Run-flat tires

4087-2. Steps to take in an emergency
■Starting the hybrid system when the 12-
volt battery is discharged
The hybrid system cannot be started by
push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlight s, the air condition-
ing system, the audio system, etc. while
the hybrid system is off.
●Turn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery
will discharge gradua lly even when the
vehicle is not in use, due to natural dis-
charge and the draining effects of certain
electrical appliances. If the vehicle is left for
a long time, the 12-volt battery may dis-
charge, and the hybrid system may be
unable to start. (The 12-volt battery
recharges automatically while the hybrid
system is operating.)
■When the 12-volt battery is removed or
discharged
●Information stored in the ECU is cleared.
When the 12-volt battery is depleted,
have the vehicle inspected at your Lexus
dealer.
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
12-volt battery is discharged. Use the
wireless remote control or the mechani-
cal key to lock or unlock the doors.
●The hybrid system may not start on the
first attempt after the 12-volt battery has
recharged but will start normally after the
second attempt. This is not a malfunction.
●The power switch mode is memorized by
the vehicle. When the 12-volt battery is
reconnected, the system will return to the
mode it was in before the 12-volt battery
was discharged. Before disconnecting
the 12-volt battery, turn the power switch
off.
If you are unsure what mode the power
switch was in before the 12-volt battery discharged, be especially careful when
reconnecting the 12-volt battery.
●The power back door must be initialized.
(
 P.119)
■When replacing the 12-volt battery
●Use a Central Degassing type 12-volt
battery (European Regulations).
●Use a 12-volt battery that the case size is
same as the previous one (LN1), 20 hour
rate capacity (20HR) is equivalent
(45Ah) or greater, and performance rat-
ing (CCA) is equivalent (286A) or
greater.
• If the sizes differ, the 12-volt battery can- not be properly secured.
• If an improper 12-volt battery is used, bat-
tery performance may decrease and the
hybrid system may not be able to restart.
• If the 20 hour rate capacity is low, even if
the time period where the vehicle is not
used is a short time, the 12-volt battery
may discharge and hybrid system may
not be able to start.
●Use a 12-volt battery with a handle. If a
12-volt battery without a handle is used,
removal is more difficult.
●After exchanging, firmly attach the fol-
lowing items to the exhaust hole of the 12-
volt battery.
• Confirm that the elbow is securely attached to the exhaust hose and exhaust
hole.
• Confirm that the exhaust hole plug is securely attached to the exhaust hole that
the elbow is not attached to.
• Use the elbow/exhaust hole plug included with the 12-volt battery
exchanged or the on e installed on the
battery prior to the exchange. (Depend-
ing on the 12-volt battery to be
exchanged, the exhaust hole may be
plugged.)

4258-1. Specifications
8
Vehicle specifications
Tire size (P.426)
Run-flat tire (RFT) or standard tire ( P.399)
This vehicle can be equipped with either run-flat tires (RFT) or standard tires. A
mark is molded on the sidewall of the run-flat tire.
DOT and Tire Identification Number (TIN) ( P.426)
Location of treadwear indicators ( P.345)
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies
in a tire.
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a bias-ply tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly put into the tire. A tube type tire has a
tube inside the tire and the tube maintains the air pressure.
Load limit at maximum cold tire inflation pressure ( P.429)
Maximum cold tire inflation pressure ( P.429)
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Tire information
Typical tire symbols
A
B
C
D
E
F
G
H
I
J

4278-1. Specifications
8
Vehicle specifications
Tire use
(P = Passenger car,
T = Temporary use)
Section width (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code
(R = Radial, D = Diagonal)
Run-flat tire code
Wheel diameter (inches)
Load index (2 digits or 3 digits)
Speed symbol (alphabet with one
letter)
■Tire dimensionsSection width
Tire height
Wheel diameter Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
This information has been prepared in
accordance with regulations issued by
the National Highway Traffic Safety
Administration of the U.S. Department
of Transportation.
It provides the purchasers and/or pro-
spective purchasers of Lexus vehicles
with information on uniform tire quality
grading.
Your Lexus dealer will help answer any
questions you may have as you read this
A
B
C
D
E
F
G
H
A
B
C
Tire section names
Uniform Tire Quality Grading
A
B
C
D
E
F
G
H
I
J
K

4328-1. Specifications
*:Table 1  Occupant loading and distribution for vehicle normal load for various desig-
nated seating capacities
Pneumatic tire
A mechanical device made of rubber, chemicals, fabric and
steel or other materials, that, when mounted on an automo-
tive wheel, provides the traction and contains the gas or fluid
that sustains the load
Radial ply tire
A pneumatic tire in which the ply cords that extend to the
beads are laid at substantiall y 90 degrees to the centerline
of the tread
Reinforced tireA tire designed to operate at higher loads and at higher
inflation pressures than the corresponding standard tire
Section width
The linear distance between the exteriors of the sidewalls of
an inflated tire, excluding elevations due to labeling, decora-
tion, or protective bands
SidewallThat portion of a tire between the tread and bead
Sidewall separationThe parting of the rubber comp ound from the cord material
in the sidewall
Snow tire
A tire that attains a traction index equal to or greater than
110, compared to the ASTM E-1136 Standard Reference
Test Tire, when using the snow traction test as described in
ASTM F-1805-00, Standard Test Method for Single Wheel
Driving Traction in a Straight Line on Snow-and Ice-Cov-
ered Surfaces, and which is ma rked with an Alpine Symbol
( ) on at least one sidewall
Test rimThe rim on which a tire is fitt ed for testing, and may be any
rim listed as appropriate for use with that tire
TreadThat portion of a tire that comes into contact with the road
Tread ribA tread section running circ umferentially around a tire
Tread separationPulling away of the tread from the tire carcass
Treadwear indicators (TWI)The projections within the principal grooves designed to
give a visual indication of the degrees of wear of the tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire assembly
securely during testing
Tire related termMeaning

4408-2. Customization
■Power windows and moon roof* ( P.145, 147)
*:If equipped
■Automatic light control system ( P.177)
■Lights ( P.177)
*1:Except for Canada
*2: If equipped
FunctionDefault settingCustomized set-
ting
Mechanical key linked opera-
tionOffOnO
Wireless remote control linked
operationOffOn (open only)O
Wireless remote control linked
operation signal (buzzer)OnOffO
FunctionDefault settingCustomized set-ting
Light sensor sensitivityStandard-2 to 2OO
Time elapsed before headlights
automatically turn off after
doors are closed
30 seconds
Off
OO60 seconds
90 seconds
Windshield wiper linked head-
light illuminationOnOffO
FunctionDefault settingCustomized set-ting
Daytime running lightsOnOff*1OO
Welcome lightingOnOffO
AFS (Adaptive Front-Lighting
System)
*2OnOffO
ABC
ABC
ABC

464Alphabetical Index
C
Card key .......................................................... 104
CareAluminum wheels ...................................... 322
Exterior ........................................................... 322
Interior ............................................................. 325
Seat belts........................................................ 325
Cargo capacity............................................... 157
Cargo hooks ................................................. 296
Center Display ............................................. 270
Chains .............................................................. 264
Child-protectors...............................................111
Child restraint system................................... 44 Fixed with a LATCH system .................. 52
Fixed with a seat belt................................... 48
Front passenger occupant classification system ............................................................. 39
Points to remember .................................... 44
Riding with children ..................................... 44
Types of child restraint system installation method ........................................................... 46
Using an anchor bracket .......................... 54
Child safety ....................................................... 44 12-volt battery precautions ...... 343, 409
Airbag precautions...................................... 36
Back door precautions...............................112
Child restraint system................................. 44
Heated steering wheel and seat heater precautions................................................286
How your child should wear the seat belt ............................................................................ 28
Moon roof precautions ............................149
Power window lock switch.....................146
Power window precautions ...................146
Rear door child-protectors ....................... 111
Removed key battery precautions ...369
Seat belt extender precautions ............. 28
Seat belt precautions .................................. 52
Cleaning...............................................322, 325 Aluminum wheels ...................................... 322
Exterior ........................................................... 322 Interior .............................................................325
Radar sensor ...................................... 192, 227
Seat belts ........................................................325
Clock .................................................78, 82, 301
Coat hooks...................................................... 310
Compass ........................................................... 317
Condenser ..................................................... 340
Console box .................................................. 294
Consumption screen .....................................97
Coolant Capacity .......................................................... 419
Checking .......................................................339
Preparing and checking before winter..........................................................................263
Cooling system............................................. 339 Hybrid system overheating ................... 410
Cornering lights ............................................. 179 Replacing light bulbs ................................ 374
Cruise control Dynamic radar cruise control with full-
speed range ................................................216
Cup holders ................................................... 294
Current fuel consumption .......................... 89
Curtain shield airbags ....................................31
Customizable features .............................. 434
D
Daytime running light system ................... 177
Deck board .................................................... 297
Deck under tray ........................................... 296
Defogger Outside rear view mirrors..................... 277
Rear window ................................................ 277
Windshield .................................................... 277
Differential ........................................................ 421
Dimension ........................................................416
Dinghy towing.................................................. 161
Display BSM (Blind Spot Monitor).................... 226
Dynamic radar cruise control with full-
speed range ................................................216
Energy monitor .............................................. 97

Alphabetical Index471
Rev indicator .................................................... 84
Rev peak............................................................. 84
Road Sign Assist ............................................ 214
RSA (Road Sign Assist) .............................. 214
Run-flat tires........................................ 347, 399
S
Seat belt reminder light................... 390, 391
Seat belts............................................................ 26 Adjusting the seat belt shoulder anchor height............................................................... 29
Automatic Locking Retractor ................ 28
Child restraint system installation ......... 44
Cleaning and maintaining the seat belt ......................................................................... 325
Emergency Locking Retractor .............. 28
How to wear your seat belt ......................27
How your child should wear the seat belt ............................................................................ 28
Pregnant women, proper seat belt use .............................................................................27
Reminder light and buzzer ........ 390, 391
Seat belt extender ........................................ 28
Seat belt pretensioners .............................. 29
SRS warning light ..................................... 388
Seat heaters .................... ............................... 286
Seating capacity............................................ 160
Seat position memory..................................133
Seats........................................................... 131, 132 Adjustment precautions ............................ 131
Adjustment....................................................... 131
Child seats/child restraint system installa-tion .................................................................... 44
Cleaning......................................................... 325
Driving position memory.........................133
Head restraint................................................136
Power easy access system .....................133
Properly sitting in the seat ........................ 25
Seat heaters .................................................. 287
Seat position memory ...............................133
Seat ventilators............................................ 287
Seat ventilators ............................................. 286 Secondary Collision Brake ..................... 257
Sensor
Automatic headlight system ................... 177
Automatic High Beam system .............180
Inside rear view mirror ............................... 141
Intuitive parking assist .............................. 232
LTA (Lane Tracing Assist) ................... 205
Parking Support Brake function (rear-crossing vehicles)................................... 252
Parking Support Brake function (static objects) ........................................................248
Radar sensor ...................................... 192, 227
Rain-sensing windshield wipers .......... 186
RCTA...............................................................240
Service plug ...................................................... 65
Service reminder message ..................... 328
Shift lever Hybrid transmission................................... 168
Side airbags ........................................................31
Side doors........................................................ 108
Side marker lights Light switch ..................................................... 177
Side mirrors ..................................................... 142 Adjustment ......................................................142
BSM (Blind Spot Monitor).................... 226
Folding...............................................................143
Linked mirror functi on when reversing
............................................................................143
Mirror position memory .......................... 133
RCTA function ............................................239
Side turn signal lights Replacing light bulbs ................................ 374
Turn signal lever ............................................ 171
Side windows ..................................................145
Smart access system with push-button start................................................................... 124Antenna location ..........................................124
Entry functions ..................................... 108, 113
Starting the hybrid system .......................162
Snow tires ....................................................... 263
Spark plug ...................................................... 420
Specifications ..................................................416