warning lights LEXUS RX350 2021 Owner's Guide

3926-3. Do-it-yourself maintenance
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 bo dy may get caught on
an operating component, possibly caus-
ing 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
unavoidable 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
water entering the headlight unit. This
may damage the headlights or cause
condensation to build up on the lens.
●Do not attempt to repair or disassem-
ble 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 prev ent heat damage.

4037-2. Steps to take in an emergency
7
When trouble arises
■Brake system warning light
■Brake system warning light
■High coolant temperature warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
If a warning light turns on or a warning buzzer sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, bu t then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by your Lexus dealer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
(U.S.A.)
or
(red)
(Canada)
Indicates that:
 The brake fluid level is low; or
 The brake system is malfunctioning
 Immediately stop the vehicle in a safe place and contact your Lexus
dealer. Continuing to drive the vehicle may be dangerous.
Warning lightDetails/Actions
(yellow)
Indicates a malfunction in the electric parking brake
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that the engine coolant temperature is too high
Immediately stop the vehicle in a safe place.
Handling method ( P.437)

4107-2. Steps to take in an emergency
The light will go off after several driving
trips.
If the light does not go off even after several
trips, contact your Lexus dealer as soon as
possible.
■Electric power steering system warning
light (warning buzzer)
When the battery charge becomes insuffi-
cient or the voltage temporarily drops, the
electric power steeri ng system warning
light may come on and the warning buzzer
may sound.
■When the tire pressure warning light
comes on
Inspect the tires to check if a tire is punc-
tured.
If a tire is punctured: P.416
If none of the tires are punctured:
Turn the engine switch off then turn it to
IGNITION ON mode. Check if the tire
pressure warning light comes on or blinks.
If the tire pressure wa rning light blinks for
1 minute then stays on
There may be a malfunction in the tire
pressure warning syst em. Have the vehicle
inspected by your Lexus dealer immedi-
ately.
If the tire pressure warning light comes
on
1 After the temperature of the tires has
lowered sufficiently, check the inflation
pressure of each tire and adjust them to
the specified level.
2 If the warning light does not turn off
even after several minutes have
elapsed, check that the inflation pres-
sure of each tire is at the specified level
and perform initialization. ( P.371)
If the warning light does not turn off several
minutes after the initia lization has been per-
formed, have the vehicle inspected by your
Lexus dealer immediately.
■The tire pressure warning light may
come on due to natural causes
The tire pressure wa rning light may come
on due to natural causes such as natural air
leaks and tire inflation pressure changes
caused by temperature. In this case, adjust-ing the tire inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with
a tire pressure warning valve and transmit-
ter. If a tire goes flat , the tire pressure warn-
ing light will not turn off even though the flat
tire has been replaced with the spare tire.
Replace the spare tire with the repaired tire
and adjust the tire inflation pressure. The
tire pressure warning light will go off after a
few minutes.
■Conditions that the tire pressure warn-
ing system may not function properly
 P.368
■Customization
Some functions can be customized.
(  P.461)
WARNING
■If both the ABS and the brake system
warning lights remain on
Stop your vehicle in a safe place immedi-
ately and contact your Lexus dealer.
The vehicle will become extremely
unstable during br aking, and the ABS
system may fail, which could cause an
accident resulting in death or serious
injury.
■When the electric power steering
system warning light comes on
When the light comes on yellow, the
assist to the power st eering is restricted.
When the light comes on red, the assist
to the power steering is lost and handling
operations of the steering wheel become
extremely heavy.
When steering wheel operations are
heavier than usual, grip the steering
wheel firmly and operate it using more
force than usual.

4357-2. Steps to take in an emergency
7
When trouble arises
6Maintain the engine speed of the
second vehicle and start the engine
of your vehicle by turning the
engine switch to IGNITION ON
mode.
7 Once the vehicle’s engine has
started, remove the jumper cables
in the exact reverse order from
which they were connected.
Once the engine starts, have the vehi-
cle inspected at your Lexus dealer as
soon as possible.
■Starting the engine when the battery is
discharged
The engine cannot be started by push-start-
ing.
■To prevent battery discharge
●Turn off the headlights and the audio sys-
tem while the engine 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.
■When removing the battery terminals
When the battery terminals are removed,
the information stored in the ECU is
cleared. Before removi ng the battery termi-
nals, contact your Lexus dealer.
■Charging the battery
The electricity stored in the battery will dis-
charge gradually even when the vehicle is
not in use, due to natural discharge and the
draining effects of certain electrical appli-
ances. If the vehicle is left for a long time,
the battery may discharge, and the engine
may be unable to start. (The battery
recharges automatically during driving.)
■When the battery is removed or dis-
charged
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
battery is discharged. Use the wireless remote control or the mechanical key to
lock or unlock the doors.
●The engine may not start on the first
attempt after the battery has recharged
but will start normally after the second
attempt. This is not a malfunction.
●The engine switch mode is memorized by
the vehicle. When the battery is recon-
nected, the system will return to the
mode it was in before the battery was dis-
charged. Before disconnecting the bat-
tery, turn the engine switch off.
If you are unsure wh
at mode the engine
switch was in before the battery dis-
charged, be especially careful when
reconnecting the battery.
●The power back door must be initialized.
(  P.109)
■Replacing the battery
●Use a battery with the same case size as
the previous battery and an equivalent
20 hour rate capacity (20HR) or greater.
• If the sizes differ, the battery cannot be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehicle is not
used is a short time, the battery may dis-
charge and the engine may not be able to
start.
●For details, consult your Lexus dealer.
WARNING
■When removing the battery terminals
Always remove the negative (-) terminal
first. If the positive (+) terminal contacts
any metal in the surrounding area when
the positive (+) terminal is removed, a
spark may occur, leading to a fire in addi-
tion to electrical shocks and death or
serious injury.
■Avoiding battery fires or explosions
Observe the following precautions to
prevent accidentally igniting the flamma-
ble gas that may be emitted from the bat-
tery:

493Alphabetical Index
Alphabetical Index
A
A/CAir conditioning filter ............................... 376
Front automatic air conditioning system......................................................................... 292
Front seat concentr ated airflow mode
(S-FLOW)................................................ 300
Micro dust and pollen filter................... 299
Rear automatic air conditioning system .........................................................................303
ABS (Anti-lock Brake System)...............274 Warning light ...............................................405
ACA (Active Cornering Assist) ........... 275
Active Cornering Assist (ACA) ........... 275
Adaptive Front-lighting System (AFS) 190
Adaptive Variable Suspension System275
AFS (Adaptive Front-lighting System) 190
AHB (Automatic High Beam) .................. 191
Air conditioning filter ................................. 376
Air conditioning system Air conditioning filter ............................... 376
Front automatic air conditioning system......................................................................... 292
Front seat concentr ated airflow mode
(S-FLOW)................................................ 300
Micro dust and pollen filter................... 299
Rear automatic air conditioning system .........................................................................303
Airbags Airbag operating conditions................... 33
Airbag precautions for your child ........ 36
Correct driving posture ............................ 25
Curtain shield airbag operating condi- tions .................................................................. 33
Curtain shield airbag precautions ....... 36
Front passenger occupant classification system ............................................................. 39
General airbag precautions ................... 36
Locations of airbags.................................... 30
Modification and disposal of airbags . 38
Side airbag operating conditions ......... 33 Side airbag precautions ............................ 36
Side and curtain shie
ld airbags operating
conditions ...................................................... 33
Side and curtain shield airbags precau- tions .................................................................. 36
SRS airbags......................................................30
SRS warning light...................................... 404
Alarm ................................................................... 68 Warning buzzer ........................................ 403
Anchor brackets ..................................... 46, 57
Antennas (smart acc ess system with
push-button start)........................................ 115
Anti-lock Brake System (ABS)...............274 Warning light .............................................. 405
Approach warning...................................... 233
Armrest............................................................ 330
Assist grips ..................................................... 330
Audio system-linked display ...................... 85
Automatic headlight leveling system ... 189
Automatic High Beam ................................. 191
Automatic light control system............... 188
Automatic transmission ..............................178 M mode ............................................................. 181
Paddle shift switches ........................ 180, 181
Auxiliary boxes ..................................... 317, 319
Average fuel economy................................. 82
Average vehicle speed ................................ 82
AWD Control.................................................. 83
B
Back door ........................................................ 103
Back-up light Wattage ..........................................................449
Back-up lights Replacing light bulbs .....................385, 391
Battery Battery checking ........................................363
If the battery is discharged ....................433
Preparing and checking before winter......................................................................... 280
Warning light .............................................. 404
Blind Spot Monitor (BSM)....................... 236

494Alphabetical Index
Bottle holders..................................................316
BrakeBrake hold...................................................... 186
Fluid ...................................................... 362, 447
Parking brake ............................................... 183
Warning light ...............................................403
Brake assist .....................................................274
Break-in tips.................................................... 155
Brightness control Instrument panel light control ................80
BSM (Blind Spot Monitor)....................... 236
Buzzer Hands off steering wheel warning (LTA)......................................................................... 223
C
Care Exterior ........................................................... 344
Interior ............................................................. 347
Seat belts........................................................ 347
Wheels and wheel ornaments............ 344
Cargo capacity.....................................159, 162
Cargo hooks ................................................... 317
Cargo net hooks ............................................ 317
Center Display .............................................288
Chains ................................................................281
Child restraint system Fixed with a LATCH system .................. 54
Fixed with a seat belt...................................50
Front passenger occupant classification system ............................................................. 39
Points to remember .................................... 45
Riding with children ..................................... 45
Types of child restraint system installation method ........................................................... 46
Using an anchor bracket .......................... 57
Child safety Airbag precautions...................................... 36
Battery precautions ......................364, 436
Child restraint system................................. 46
Heated steering wheel and seat heater precautions................................................306 How your child should wear the seat belt
............................................................................. 27
Moon roof precautions............................ 148
Panoramic moon roof precautions ..... 151
Power back door precautions ............. 103
Power window lock switch .................... 146
Power window precautions .................. 145
Rear door child-protectors ................... 102
Seat belt extender precautions.............. 27
Seat belt precautions .................................. 45
Child-protectors............................................102
Cleaning Exterior............................................................ 344
Interior ............................................................. 347
Radar sensor ................................................203
Seat belts ........................................................ 347
Wheels and wheel ornaments ............344
Clock ..........................................................77, 331
Coat hooks.......................................................331
Coin box............................................................316
Compass ......................................................... 340
Condenser ..................................................... 362
Console box ....................................................314
Consumption screen .................................... 92
Cooling system...............................................361 Engine overheating................................... 437
Cornering lights ............................................ 190 Replacing light bulbs ............................... 385
Cruise control Dynamic radar cruise control with full-speed range ...................................... 227
Cup holders .....................................................315
Current fuel consumption .......................... 82
Curtain shield airbags .................................. 30
Customizable features ................................461
D
Daytime running light system .................. 188
Defogger Outside rear view mirrors..................... 294
Rear window ................................................ 294
Windshield .................................................... 294

495Alphabetical Index
DifferentialRear differential oil .................................... 447
Dimension ...................................................... 442
Dinghy towing................................................. 173
Display Center Display............................................288
Dynamic radar cruise control with full-speed range .......................................227
Head-up display ...........................................88
Intuitive parking assist.............................. 244
LTA (Lane Tracing Assist)...................... 221
Multi-information display ............................81
RCTA ..............................................................250
Warning message....................................... 412
Distance until next engine oil change .... 80
Do-it-yourself maintenance ......................351
Door courtesy lights ................................... 309 Wattage.......................................................... 449
Door lock Power back door........................................ 103
Side doors ........................................................ 99
Smart access system with push-button start ................................................................... 115
Wireless remote control........................... 97
Door pockets ..................................................316
Doors Automatic door lock ing and unlocking
system ............................................................102
Door glasses .................................................. 144
Door lock warning buzzer .................... 100
Open door warning buzzer ..................102
Outside rear view mirrors ........................141
Rear door child-protectors ....................102
Side doors ........................................................ 99
Drive distance .................................................. 82
Driver’s seat position memory Driving position memory.........................133
Memory recall function ............................135
Power easy access system .....................133
Drive-start control ....................................... 155
Driving Break-in tips .................................................. 155 Correct driving posture ............................ 25
Driving mode select switch .................... 271
Procedures .................................................... 154
Winter drive tips ........................................ 280
Driving assist system information ............ 85
Driving information disp lay ........................ 82
Driving position memory............................133 Memory recall function............................ 135
Power easy access system .................... 133
Driving range ................................................... 82
Dynamic radar cruise control with full-speed range .........................................227Warning message .....................................235
Dynamic Torque Control AWD system .......................................................................... 275
E
Eco Driving Indicator............................83, 92
Eco Driving Indicator Light ........................ 83
EDR (Event data recorder) ............................7
Elapsed time ..................................................... 82
Electric Power Steering (EPS) .............. 275 Warning light .............................................. 405
Electronic key .................................................. 96 Battery-saving function.............................. 116
If the electronic key does not operate properly .........................................................431
Replacing the battery ............................... 379
Electronic sunshade Jam protection function ........................... 150
Operation ....................................................... 149
Emergency flashers .................................... 394
Emergency, in case of If a warning buzzer sounds.................. 403
If a warning light turns on...................... 403
If a warning message is displayed .......412
If the battery is discharged ....................433
If the electronic key does not operate properly .........................................................431
If the engine will not start........................428
If the fuel filler do or cannot be opened
......................................................................... 430

496Alphabetical Index
If the vehicle is trapped in rising water.........................................................................395
If you have a flat tire ....................................416
If you lose your keys.................................430
If you think something is wrong .......... 401
If your vehicle becomes stuck............. 439
If your vehicle has to be stopped in an
emergency ................................................ 394
If your vehicle needs to be towed ..... 397
If your vehicle overheats ........................ 437
Engine ACCESSORY mode ............................... 177
Compartment .............................................359
Engine switch................................................. 174
Fuel pump shut off system .................... 402
Hood................................................................ 357
How to start the engine............................ 174
Identification number ............................... 443
If the engine will not start ....................... 428
If your vehicle has to be stopped in an
emergency ................................................ 394
Ignition switch (engine switch) ............. 174
Overheating................................................. 437
Tachometer ...................................................... 77
Engine coolant Capacity ......................................................... 446
Checking .........................................................361
Preparing and checking before winter.........................................................................280
Engine coolant temperature gauge ........ 77
Engine immobilizer system ........................ 66
Engine oil Capacity ......................................................... 444
Checking .......................................................359
Preparing and checking before winter.........................................................................280
Warning light ...............................................404
Engine oil maintenance data ....................361
Engine switch .................................................. 174 Auto power off function ........................... 177
Changing the engine switch modes.. 177 If your vehicle has to be stopped in an
emergency .................................................394
EPS (Electric Power Steering) .............. 275 Warning light .............................................. 405
Event data recorder (E DR) ............................7
F
Flat tire
Tire pressure warning system ............. 367
Vehicles with a spare tire........................ 416
Floor mats .......................................................... 24
Fluid Automatic transmission .......................... 447
Brake ................................................................ 447
Washer ...........................................................364
Fog lights Switch................................................................ 194
Footwell light ................................................. 309
Front automatic air conditioning system .......................................................................... 292
Front fog lights Replacing light bulbs ............................... 385
Front passenger footwell hooks ............ 333
Front passenger occupant classification system .............................................................. 39
Front seats Adjustment ....................................................... 121
Cleaning ......................................................... 347
Correct driving posture ............................ 25
Driving position memory ........................ 133
Head restraints............................................. 136
Memory recall function............................ 135
Power easy access system .................... 133
Seat heaters ................................................. 306
Seat position memory .............................. 133
Seat ventilators ........................................... 306
Front side marker light Light switch ....................................................188
Replacing light bulbs ............................... 385
Front side marker lights Replacing light bulbs ............................... 385
Wattage ..........................................................449

497Alphabetical Index
Front turn signal lightsReplacing light bulbs................... 385, 387
Turn signal lever ...........................................182
Wattage.......................................................... 449
Fuel Capacity ......................................................... 444
Fuel gauge ........................................................ 77
Fuel pump shut off system .................... 402
Information ....................................................450
Refueling ........................................................200
Type.................................................................. 444
Warning light ...............................................406
Fuel consumption Average fuel economy .............................. 82
Current fuel consumption........................ 82
Fuel filler door If the fuel filler door cannot be opened.........................................................................430
Refueling ........................................................200
Fuel gauge .......................................................... 77
Fuel pump shut off system........................ 402
Fuses .................................................................. 381
G
Garage door opener ................................. 334
Gauges ................................................................ 77
G-force............................................................... 84
Glove box .........................................................314
Glove box light ...............................................314
Grocery bag hooks ..................................... 318
H
Hands Free Power Back Door ............... 106
Head restraints ...............................................136
Headlight aim ................................................ 382
Headlights Adaptive Front-lighting System (AFS).......................................................................... 190
Automatic High Beam system............... 191
Light switch .................................................... 188
Replacing light bulbs............................... 385 Head-up display..............................................88
Driving information display area .......... 88
Eco Driving Indicator.................................. 92
HUD (Head-up display) switch ............89
Navigation system-linked display ..........91
Settings...............................................................90
Heated steering wheel .............................. 306
Heaters Front automatic air conditioning system.......................................................................... 292
Heated steering wheel ........................... 306
Outside rear view mirrors..................... 294
Rear automatic air conditioning system
......................................................................... 303
Seat heaters ................................................. 306
High mounted stoplight Replacing light bulbs ............................... 385
Hill-start assist control ............................... 275
Hood Open................................................................357
Hooks Cargo hooks..................................................317
Cargo net hooks ..........................................317
Coat hooks .................................................... 331
Front passenger footwell hooks.........333
Grocery bag hooks................................... 318
Retaining hooks (floor mat) ..................... 24
Horn ....................................................................139
HUD (Head-up display) switch ................ 89
I
I/M test ............................................................ 354
Identification Engine.............................................................. 443
Vehicle ............................................................443
If your vehicle has to be stopped in an emergency .................................................. 394
Ignition switch (engine switch)................. 174 Auto power off function............................ 177
Changing the engine switch modes .. 177
If your vehicle has to be stopped in an emergency .................................................394

498Alphabetical Index
Indicators ............................................................74
InitializationItems to initialize ......................................... 474
Maintenance ..................................... 350, 361
Power windows............................................ 144
Tire pressure warning system ............... 371
Inside rear view mirror ............................... 140
Instrument panel light control ................... 80
Intercooler coolant Capacity ......................................................... 446
Interior lights.................................................. 309 Front interior light ......................................309
Rear interior light .......................................309
Intuitive parking assist..................... 242, 244 Function .......................................................... 244
Warning message..................................... 246
J
JackPositioning a floor jack............................ 357
Vehicle-equipped jack ............................. 417
Jack handle ...................................................... 417
Jam protection function Electronic sunshade .................................. 150
Moon roof ....................................................... 147
Panoramic moon roof.............................. 150
Power back door........................................ 109
Power windows............................................ 144
Rear seats ........................................................ 122
K
Keyless entrySmart access system with push-button start ................................................................... 115
Wireless remote control........................... 97
Keys Battery-saving function ............................. 116
Electronic key ................................................. 96
Engine switch................................................. 174
If the electronic key does not operate properly......................................................... 431 If you lose your keys ................................ 430
Key number plate .........................................96
Keyless entry .......................................... 97, 115
Mechanical key .............................................. 96
Replacing the battery ............................... 379
Warning buzzer ............................................ 115
Wireless remote control ........................... 97
Knee airbags .................................................... 30
L
Lane Tracing Assist (LTA) Operation ........................................................216
Warning messages................................... 224
Language (multi-information display) ... 85
LATCH anchors ............................................. 54
Lever Auxiliary catch lever .................................357
Hood lock release lever .........................357
Shift lever ......................................................... 178
Turn signal lever .......................................... 182
Wiper lever .................................................... 194
Lexus climate concierge ............................291
Lexus Enform Safety Connect.................. 60
Lexus Safety System + 2.0 AHB (Automatic High Beam) ............... 191
Dynamic radar cruise control with full-speed range ...................................... 227
LTA (Lane Tracing Assist) ......................216
PCS (Pre-Collision System) ............... 209
RSA (Road Sign Assist).......................... 225
License plate lights Light switch ....................................................188
Replacing light bulbs ............................... 385
Light bulbs Replacing ...................................................... 384
Lights Automatic High Beam system ............... 191
Fog light switch ............................................ 194
Front interior lights ................................... 309
Front personal lights.................................. 310
Headlight switch..........................................188
Interior lights ................................................ 309