2017 LEXUS RX200T warning light

6147-3. Do-it-yourself maintenance
RX350/RX200t_EE_OM48F32E
Your vehicle is equipped with a tire pressure warning system that uses tire pres-
sure warning valves and transmitters to detect low tire inflation pressure before
serious problems arise.
Tire pressure warning system
●The tire pressure detected by the tire
pressure warning system can be dis-
played on the multi-information display.
The illustration used is intended as an exam- ple, and may differ from the image that is
actually displayed on the multi-information display.
●If the tire pressure drops below a prede-
termined level, the driver is warned by a
screen display and a warning light.
( P. 669)
The illustration used is intended as an exam-
ple, and may differ from the image that is actually displayed on the multi-informationdisplay.

6167-3. Do-it-yourself maintenance
RX350/RX200t_EE_OM48F32E
■How to initialize the tire pressure warning system
Park the vehicle in a safe place and turn the engine switch off.
Initialization cannot be perfor med while the vehicle is moving.
Adjust the tire inflation pressure to the specified cold tire inflation pressure
level. ( P. 737)
Make sure to adjust the tire pressure to the specified cold tire inflation pressure level. The tire pressure warning system will operate based on this pressure level.
Turn the engine switch to IGNITION ON mode.
Select on the multi-information display. ( P. 110)
Press or of the meter control switch, select the “Vehicle Settings”
screen and then press the .
Press or of the meter con-
trol switch, select the “TPMS”
screen and then press and hold
the until the tire pressure
warning light blinks slowly 3
times.
“- -” will be displayed for inflation pressure of each tire on the multi-information display while the tire
pressure warning system determines the position of each tire.
When position of each tire is determined, the inflation pressure of each tire will be
displayed on the multi-information display.
Drive the vehicle at approximately 40 km/h (25 mph) or more for approx-
imately 10 to 30 minutes until the inflation pressure of each tire is displayed
on the multi-information display.
If tire inflation pressure becomes low before the inflation pressure is displayed, the tire pressure warning light will come on.
Depending on the vehicle and driving co nditions, initialization may take up to
approximately 1 hour to complete.
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6177-3. Do-it-yourself maintenance
7
Maintenance and care
RX350/RX200t_EE_OM48F32E
◆Registering ID codes
The tire pressure warning valve and transmitter is equipped with a unique ID
code. When replacing a tire pressure wa rning valve and transmitter, it is nec-
essary to register the ID code. Have the ID code registered by any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional.
■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 prop erly repaired due to the size or location of a cut or other damage.
If you are not sure, consult with any authorized Lexus dealer or repairer, or another duly qualified and equipped professional.
■Replacing tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not registered, the tire pressure warning system will not work proper ly. After driving for about 10 minutes, the tire pressure warning light blinks for 1 minu te and stays on to indicate a system malfunc-
tion.
■Tire life
Any tire over 6 years old must be checked by a qualified technician even if it has seldom
or never been used or damage is not obvious.
■Routine tire inflation pressure checks
The tire pressure warning system does not re place routine tire inflation pressure checks.
Make sure to check tire inflation pressure as part of your routine of daily vehicle checks.
■Initializing the tire pressure warning system
Initialize the system with the tire inflatio n pressure adjusted to the specified level.
■If the tread on snow tires wears down below 4 mm (0.16 in.)
The effectiveness of the tires as snow tires is lost.
■If you press the tire pressure warning reset switch accidentally
If initialization is performed, ad just the tire inflation pressure to the specified level and ini- tialize the tire pressure warning system again.

6187-3. Do-it-yourself maintenance
RX350/RX200t_EE_OM48F32E
■Situations in which the tire pressure warning system may not operate properly
●In the following cases, the tire pressure warning system may not operate properly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equipment) tire. • A tire has been replaced with a tire that is not of the specified size.• Tire chains, etc., are equipped.
• If a window tint that affects the radio wave signals is installed. • If there is a lot of snow or ice on the vehi cle, particularly around the wheels or wheel housings.
• If the tire inflation pressure is extr emely higher than the specified level. • If wheel without the tire pressure warning valve and transmitter is used.• If the ID code on the tire pressure warning valves and transmitters is not registered
in the tire pressure warning computer.
●Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large display, air- port or other facility that generates st rong radio waves or electrical noise. • When carrying a portable radio, cellular phone, cordless phone or other wireless
communication device. If tire position information is not correctly displayed due to the radio wave conditions, the display may be corrected by driving and changing the radio wave conditions.
●When the vehicle is parked, the time taken for the warning to start or go off could beextended.
●When tire inflation pressure declines rapi dly for example when a tire has burst, the
warning may not function.
■The initialization operation
●Make sure to carry out initialization af ter adjusting the tire inflation pressure.
Also, make sure the tires are cold before carry ing out initialization or tire inflation pres- sure adjustment.
●If you have accidentally turned the engine swit ch off during initialization, it is not neces- sary to restart the initialization again as in itialization will restart automatically when the engine switch has been turned to IGNITION ON mode for the next time.
●If you accidentally restart the initialization when initialization is not necessary, adjust the tire inflation pressure to the specified leve l when the tires are cold, and conduct initial- ization again.
●While the position of each tire is being de termined and the inflation pressures are not being displayed on the multi-information display, if the inflation pressure of a tire drops, the tire pressure warning light will come on.

6197-3. Do-it-yourself maintenance
7
Maintenance and care
RX350/RX200t_EE_OM48F32E
■Warning performance of the tire pressure warning system
The warning of the tire pressure warning syst em will change in accordance with the con- ditions under which it was initialized. For this reason, the system may give a warning even
if the tire pressure does not reach a low enough level, or if the pressure is higher than the pressure that was adjusted to when the system was initialized.
■When initialization of the tire pressure warning system has failed
Initialization may take longer to complete if the vehicle is driven on an unpaved road. When performing initialization, drive on a paved road if possible. Depending on the driv- ing environment and cond ition of the tires, initialization will be completed in approxi-
mately 10 to 30 minutes. If initialization is not complete after driving approximately 10 to 30 minutes, continue driving for a while.
If the inflation pressure of each tire is not displayed after driving for approximately 1 hour,
perform the following procedure.
●Park the vehicle in a safe place for approxim ately 20 minutes. Then drive straight (with occasional left and right turns) at appr oximately 40 km/h (25 mph) or more for
approximately 10 to 30 minutes.
However, in the following situations, the tire inflation pressure will not be recorded and the system will not operate proper ly. Perform initialization again.
●When operating the tire pressure warning reset switch, the tire pressure warning light does not blink 3 times.
●After performing initialization, the tire pre ssure warning light blinks for 1 minute then
stays on while driving.
If the inflation pressure of each tire is still not displayed, have the vehicle inspected by any authorized Lexus dealer or repairer, or anot her duly qualified and equipped professional.

6277-3. Do-it-yourself maintenance
7
Maintenance and care
RX350/RX200t_EE_OM48F32E
WARNING
■When inspecting or replacing tires
Observe the following precautions to prevent accidents. Failure to do so may cause damage to parts of the drive train as well as dangerous han-
dling characteristics, which may lead to an acc ident resulting in death or serious injury.
●Do not mix tires of different makes, models or tread patterns. Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other th an those recommended by Lexus.
●Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have been used on another vehicle. Do not use tires if you do not know how they were used previously.
●Vehicles with a compact spare tire: Do not tow if your vehicle has a compact spare
tire installed.
●Vehicles with an emergency tire puncture repa ir kit: Do not tow anything if a tire that has been repaired using the emergency tire puncture repair kit is installed. The load
on the tire may cause unexpected damage to the tire.
■When initializing the tire pressure warning system
Do not initializing tire inflation pressure with out first adjusting the tire inflation pressure
to the specified level. Otherwise, the tire pressure warning light may not come on even if the tire inflation pressure is low, or it may come on when the tire inflation pressure is actually normal.

6427-3. Do-it-yourself maintenance
RX350/RX200t_EE_OM48F32E
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may need replacement. ( P. 643)
●If the replaced fuse blows again, have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
■If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you us e genuine Lexus products designed for this vehicle. Because certain bulbs are connected to circuits designed to prevent overload, non-gen-
uine parts or parts not designed for this vehicle may be unusable.
WARNING
■To prevent system breakdowns and vehicle fire
Observe the following precautions. Failure to do so may cause damage to the vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than that indicated, or use any otherobject in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
●Do not modify the fuses or fuse boxes.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional as soon as possible.

6537-3. Do-it-yourself maintenance
7
Maintenance and care
RX350/RX200t_EE_OM48F32E
■LED lights
The headlight low beams, headlight high beams, front turn signal lights (vehicles with tri- ple-beam headlights), front position lights and daytime running lights, front fog lights, cornering lights (if equipped), rear fog lights, rear turn signal light (vehicles with triple-
beam headlights), side turn signal lights, st op/tail lights, rear side marker lights, high mounted stoplight, license plate lights, and outer foot lights consist of a number of LEDs.If any of the LEDs has burned out, take your vehicle to any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional to have the light replaced.
■Condensation build-up on the inside of a lens
Temporary condensation build-up on the inside of the headlight lens does not indicate a
malfunction. Contact any authorized Lexus dealer or repairer, or another duly qualified and equipped professional for more info rmation in the following situations:
●Large drops of water have built up on the inside of a lens.
●Water has built up inside a headlight.
■When replacing light bulbs
 P. 642
WARNING
■To prevent injury
Before performing any light bulb replacement procedure, be sure to turn the engine switch off. Failure to do so may result in burns from hot components or a part of your body may get caught on an operating co mponent, possibly causing serious injury.
■Replacing light bulbs
●Turn off the lights. Do not attempt to replace the bulb immediately after turning off the lights.
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. When it is unavoid- able to hold the glass portion, use and hold with a clean dry cloth to avoid getting
moisture and oils on the bulb. Also, if the bulb is scratched or dropped, it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failure to do so may result
in heat damage, fire, or wate r entering the headlight unit. This may damage the head- lights or cause condensation to build up on the lens.
●Do not attempt to repair or disassemble the light bulbs, connectors, electric circuits
or component parts. Doing so may result in death or serious injury due to electric shock.
■To prevent damage or fire
●Make sure bulbs are fully seated and locked.
●Check the wattage of the bulb before installing to prevent heat damage.