winter tires LEXUS UX250H 2019 Owners Manual

13Pictorial index
Windshield wipers ..................................................................................................P.184
Precautions against winter season ............................................................................ P.263
To prevent freezing (windshield wiper de-icer)
*.................................................. P.281
Precautions against car wash (r ain-sensing windshield wipers)
*................. P.323
Fuel filler door ..........................................................................................................P.190
Refueling method .............................................................................................................. P .190
Fuel type/fuel tank capacity ......... ..................................................................................P.417
Tires.......................................................................................................................... ..P.345
Tire size/inflation pressure ........................................................................................... P.422
Winter tires/tire chain .................................................................................................... P.26 3
Checking/rotation/tire pressure warning system.............................................. P.345
Coping with flat tires........................................................................................................ P .399
Hood ......................................................................................................................... P. 335
Opening ........................................................................................................................ .......P.335
Engine oil ..................................................................................................................... .......... P.418
Coping with overheat ...................................................................................................... P.410
Warning messages ..........................................................................................................P.395
Headlights ................................................................................................................. P.17 7
Parking lights/daytime running lights............................................................... P.177
Fog lights
*..................................................................................................................P.183
Cornering lights
*..................................................................................................... P.179
Turn signal lights ....................................................................................................... P.171
Tail lights/stop lights............................................................................................... P.177
Stop lights
License plate lights ................................................................................................. P.177
Back-up lights
Shifting the shift lever to R ...............................................................................................P.1 67
Light bulbs of the exterior lights for driving
(Replacing method: P.374, Watts: P.422)
D
E
F
G
H
I
J
K
L
M
N
O
P

2624-6. Driving tips
Control and maintain the vehicle at a
constant speed. Before stopping at a
toll booth or similar, allow plenty of
time to release the accelerator and
gently apply the brakes. A greater
amount of electrical energy can be
regenerated when slowing down.
Use the air conditioning only when
necessary. Doing so can help reduce
excessive gasoline consumption.
In summer: When the ambient tem-
perature is high, use the recirculated
air mode. Doing so will help to reduce
the burden on the air conditioning sys-
tem and reduce fuel consumption as
well.
In winter: Because the gasoline engine
will not automatically cut out until it and
the interior of the vehicle are warm, it
will consume fuel. Also, fuel consump-
tion can be improved by avoiding over-
use of the heater.
Make sure to check the tire inflation
pressure frequently. Improper tire infla-
tion pressure can cause poor fuel
economy.
Also, as snow tires can cause large
amounts of friction, their use on dry
roads can lead to poor fuel economy.
Use tires that are appropriate for the
season. Carrying heavy luggage will lead to
poor fuel economy. Avoid carrying
unnecessary luggage.
Installing a large
roof rack will also cause poor fuel
economy.
Since the gasoline engine starts up and
cuts out automatically when cold,
warming up the engine is unnecessary.
Moreover, frequently driving short dis-
tances will cause the engine to repeat-
edly warm up, which can lead to excess
fuel consumption.
Highway driving
Air conditioning
Checking tire inflation pressure
Luggage
Warming up before driving

2634-6. Driving tips
4
Driving
Use fluids that are appropriate to
the prevailing outside temperatures.
• Engine oil
• Engine/power control unit coolant
• Washer fluid
Have a service technician inspect
the condition of the 12-volt battery.
 It is recommended that the vehicle is
fitted with four snow run-flat 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.
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
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 br aking 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).
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

3466-3. Do-it-yourself maintenance
■When to replace your vehicle’s tires
Tires should be replaced if:
●The treadwear indicators are showing on
a tire.
●You have tire damage such as cuts, splits,
cracks deep enough to expose the fabric,
and bulges indicating internal damage.
●A tire goes flat repeatedly or cannot be
properly repaired due to the size or loca-
tion of a cut or other damage.
If you are not sure, consult with your Lexus
dealer.
■Tire life
Any tire over 6 years old must be checked
by a qualified technician even if it has sel-
dom or never been used or damage is not
obvious.
■Maximum load of tire
Check that the maximum load of the
replacement tire is greater than 1/2 of the
Gross Axle Weight Ratings (GAWR) of
either the front axle or the rear axle, which-
ever is greater.
For the GAWR, see the Certification Label.
For the maximum load of the tire, see the
load limit at maximum cold tire inflation
pressure mentioned on the sidewall of the
tire. ( P.425)
■Tire types
●Summer tires
Summer tires are high-speed perfor-
mance tires best suited to highway driv-
ing under dry conditions. Since summer
tires do not have the same traction per-
formance as snow tires, summer tires are
inadequate for drivin g on snow-covered
or icy roads. For driving on snow-covered
roads or icy roads, the use of snow tires is
recommended. When installing snow tires, be sure to replace all four tires.
●All season tires
All season tires are designed to provide
better traction in
snow and to be ade-
quate for driving in most winter condi-
tions as well as for use year-round. All
season tires, howeve r, do not have ade-
quate traction performance compared
with snow tires in heavy or loose snow.
Also, all season tires fall short in accelera-
tion and handling performance com-
pared with summer tires in highway
driving.
●Snow tires
For driving on snow-covered roads or icy
roads, we recommend us ing snow tires. If
you need snow tires, select tires of the
same size, construction and load capacity
as the originally installed tires. Since your
vehicle has radial tires as original equip-
ment, make sure your snow tires also
have radial construction. Do not install
studded tires without first checking local
regulations for possible restrictions.
Snow tires should be installed on all
wheels. ( P.263)
■If the tread on snow tires wears down
below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is
lost.
■Replacing tires
Your vehicle may not be equipped with the
following tools and jack for replacing a tire.
In this case, when replacing tires with tires
that are not run-flat tires, purchase tools
and jack. Tools and jack can be purchased
at your Lexus dealer.
●Wheel nut wrench
●Jack
●Jack handle

470Alphabetical Index
Parking brake engaged warning buzzer........................................................................... 174
Warning light ...............................................389
Warning message....................................... 174
Parking lights Light switch ..................................................... 177
Replacing light bulbs................................ 374
Parking Support Brake function (rear- crossing vehicles) .......................... 243, 252Function .......................................................... 252
Parking Support Brake function (static objects) .............................................. 243, 247Function .......................................................... 247
PCS (Pre-Collision System) .................... 198 Function ........................................................... 198
PCS OFF switch ........................................200
Warning light ............................................... 392
Personal lights............................................... 290
PKSA (Parking Support Alert) ................231
PKSB (Parking Support Brake)............. 243 Warning message..................................... 246
Power back door open er and closer ..... 115
Power control unit coolant ...................... 339 Capacity ...........................................................419
Checking ....................................................... 339
Preparing and checking before winter......................................................................... 263
Power easy access system ........................133
Power outlets ................................................ 302
Power steering (Electric Power Steering system).......................................................... 257Warning light .............................................. 388
Power switch ................................................... 162 Auto power off function ...........................164
Changing the power switch modes ..164
If your vehicle has to be stopped in an
emergency ................................................ 378
Starting the hybrid system....................... 162
Power windows ..............................................145 Door lock linked window operation..146
Jam protection function............................145
Operation........................................................145 Window lock switch.................................. 146
Pre-Collision System (PCS) .................... 198 Function ........................................................... 198
PCS OFF switch ....................................... 200
Warning light ...............................................392
R
Radar cruise control (dynamic radar cruise control with full-speed range)...............216
Radiator ........................................................... 340
RCTA (Rear Cross Traffic Alert) 231, 239
RCTA Function ..........................................................239
Warning message .....................................240
Rear Cross Traffic Alert (RCTA) 231, 239
Rear seat Folding down the rear seatbacks ........132
Rear side marker lights Light switch ..................................................... 177
Rear turn signal lights Replacing light bulbs ................................ 374
Turn signal lever ............................................ 171
Rear view mirror Inside rear view mirror ............................. 140
Outside rear view mirrors.......................142
Rear window defogger ..............................277
Rear window wiper...................................... 188
Refueling .......................................................... 190 Capacity ...........................................................417
Fuel types .........................................................417
Opening the fuel tank cap ..................... 190
When the fuel filler door cannot be
opened.........................................................402
Regenerative braking ................................... 63
Remote Touch .............................................. 270
Replacing Electronic key battery ............................. 368
Fuses.................................................................370
Light bulbs ..................................................... 374
Tires ................................................................. 355
Resetting the message indicating mainte- nance is required ...................................... 328