2018 LEXUS RC350 tire pressure reset

4186-3. Do-it-yourself maintenance
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)
WARNING
■When inspecting or replacing tires
Observe the following precautions to prevent accidents.
Failure to do so may cause damage to parts of the drivetrain as well as dangerous han-
dling characteristics, which may lead to an accident 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 than 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 be en 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 no t tow if your vehicle has a compact spare
tire installed.
●Vehicles with an emergency tire puncture repair 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 operate the tire pressure warning reset switch without first adjusting the tire
inflation pressure to the spec ified level. Otherwise, the tire pressure warning light may
not come on even if the tire inflation pressu re is low, or it may come on when the tire
inflation pressure is actually normal.
■Caution regarding interference with electronic devices
●Users of any electrical medical device ot her than implantable cardiac pacemakers,
cardiac resynchronization th erapy-pacemakers or implantable cardioverter defibril-
lators should consult the manufacturer of the device for information about its opera-
tion under the influence of radio waves.
Radio waves could have unexpected effects on the operation of such medical
devices.
●People with implantabl e cardiac pacemakers,
cardiac resynchronization therapy-pacemak-
ers or implantable cardioverter defibrillators
should not come within 17.7 in. (450 mm) of
the tire pressure warn ing system initiators.
The radio waves may affect the operation of
such devices.

4577-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)
7
When trouble arises
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact sensors, side
impact sensors (door), side impact sensors (front), side im pact sensors (rear), driver’s
seat position sensor, driver’s seat belt buckle switch, front passenger occupant classifica-
tion system, “AIR BAG ON” indicator light, “A IR BAG OFF” indicator light, front passen-
ger’s seat belt buckle switch, seat belt pretensioners, airbags, interconnecting wiring and
power sources. ( P. 41)
■Front passenger detection sensor, seat belt reminder and warning buzzer
If luggage is placed on the front passenger seat, the front passenger detection sensor
may cause the warning light to flash and the warning buzzer to sound even if a passenger
is not sitting in the seat.
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fu el tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after severa l trips, contact your Lexus dealer as soon as
possible.
■Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficien t or the voltage temporarily drops, the
electric power steering system warning li ght may come on and the warning buzzer may
sound.
■When the tire pressure warning light comes on
Check the tire inflation pressu re and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not tu rn off the tire pressure warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caus ed by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with the spare tire (if equipped)
The spare tire is not equipped with a tire pr essure warning valve and transmitter. If a tire
goes flat, the tire pressure warning light will not turn off even though the flat tire has been
replaced with the spare tire.
■Conditions that the tire pressure wa rning system may not function properly
 P. 417
■If the tire pressure warning light freque ntly comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mo de, have it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.

4827-2. Steps to take in an emergency
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
■Warning messages
The warning message illustrations used are intended as examples, and may differ from
the image that is actually displaye d on the multi-information display.
■Warning message in radar cruise mode
In the following cases, the warning message may not be displa yed even if vehicle-to-vehi-
cle distance decreases:
● When your vehicle and the vehicle ahead ar e traveling at the same speed or the vehi-
cle ahead is traveling more quickly than your vehicle
●When the vehicle ahead is traveling at a very low speed
●Immediately after cruise control speed is set
●At the instant the accelerator pedal is depressed
■The LDA (Lane Departure Alert with steering control) lane departure warning func-
tion
In the following situations, th e warning message will not be displayed even if a lane line is
crossed.
●When the vehicle speed deviates from the operating range of the LDA system func-
tions ( P. 266)
●When the lane lines cannot be recognized ( P. 267)
■Resetting the message indicating ma intenance is required (if equipped)
Make sure to reset the oil change system. ( P. 385, 403)
■Conditions that the tire pressure wa rning system may not function properly
 P. 417
■Warning buzzer
P. 457

631Alphabetical index
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
Switches
Active rear wing switch ..................307
ASC (Active Sound Control) switch.................................................... 223
Audio remote control switches
*
Automatic High Beam system ....228
BSM (Blind spot monitor) switch................................................... 290
Cruise control switch...................... 268
Door lock switches .............................147
Driving mode select switch ........... 301
Driving position memory switches ................................................ 166
Emergency flashers switch ........... 442
Engine switch .......................................207
Fog light switch ................................... 232
Garage door opener switches .............................................. 359
Heated steering wheel switch....................................................344
Ignition switch ......................................207
Intuitive parking assist switch ........ 281
LDA (Lane Departure Alert with steering control) switch ....264
Light switches ...................................... 225
Meter control switches ........... 106, 119 Moon roof switches .......................... 186
Outside rear view mirror
switches ................................................178
Paddle shift switches............... 215, 216
Power door lock switch ................... 147
Power window switches ..................182
Rear window and outside rear view mirror defoggers
switch ...................................................338
Seat heater switches ........................ 345
Seat ventilator switches .................. 346
Snow mode switch ............................. 214
“SOS” button ....................................... 370
Talk switch
*
Telephone switches*
Tilt and telescopic steering control switch .................. 174
Tire pressure warning reset switch ..................................................... 414
Trunk opener main switch .............. 152
Trunk opener switch ........................... 151
TVD (Torque Vectoring Differential) switch .......................... 310
Vehicle-to-vehicle distance button ....................................................274
VSC OFF switch ................................. 314
Window lock switch ..........................182
Windshield wiper and washer switch ......................... 233
Windshield wiper de-icer switch ................................................... 339
*: Refer to the “NAVIGATIO N AND MULTIMEDIA SYSTEM
OWNER’S MANUAL”.

632Alphabetical index
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
Tachometer ........................................ 91, 96
Variable red zone................................. 101
Tail lights................................................... 225 Light switch ........................................... 225
Replacing light bulbs ........................439
Talk switch
*
Telephone switches*
Theft deterrent system Alarm.......................................................... 80
Engine immobilizer system.............. 79
Luggage security system ................ 152
Theft prevention labels ....................... 82
Tire inflation pressure ......................... 420 Maintenance data ............................. 548
Tire inflation pressure display function ................................................. 413
Warning light ...................................... 455
Tire information ..................................... 557 Glossary ................................................ 564
Size ........................................................... 560
Tire identification number............. 559
Uniform Tire Quality Grading...............................................562 Tire pressure warning system ........... 413
Initializing ................................................. 413
Installing tire pressure warning valves and transmitters.................. 413
Registering ID codes ......................... 414
Tire pressure warning reset switch ..................................................... 414
Warning light .......................................455
Tires ............................................................. 412 Chains ..........................................322, 322
Checking ................................................. 412
Emergency tire puncture repair kit ..............................................502
If you have a flat tire ............. 489, 502
Inflation pressure................................548
Information............................................ 557
Replacing ...............................................489
Rotating tires .......................................... 412
Size ...........................................................548
Snow tires .............................................. 323
Spare tire................................................489
Tire inflation pressure display function.................................................. 413
Tire pressure warning system ....... 413
Warning light .......................................455
T