2021 LEXUS LS500 warning lights

4277-2. Steps to take in an emergency
7
When trouble arises
■Brake system warning light (warning buzzer)
■Brake system warning light (warning buzzer)
■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.
Indicates that the brake pads are worn out (only the right-side pads can
be detected)
 Have the vehicle inspected by your Lexus dealer.
Warning lightDetails/Actions
(yellow)
Indicates a malfunction in:
The electronically controlled brake sy stem (vehicles with Lexus Safety
System + A); or
 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.449)

4317-2. Steps to take in an emergency
7
When trouble arises
■Rear passengers’ seat belt reminder lights (warning buzzer)*
*: Rear passengers’ seat belt warning buzzer:
The rear passengers’ seat belt warning buzzer sounds to alert the rear passenger that his or
her seat belt is not fastened. If the seat belt is unfastened, the buzzer sounds intermittently
for a certain period of time, af ter the seat belt is fastened and unfastened and the vehicle
reaches a certain speed.
■Tire pressure warning light
■LTA indicator (warning buzzer)
Warning lightDetails/Actions
(except F SPORT models)
(F SPORT models)
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.
Warning lightDetails/Actions
When the light comes on after blinking for approximately 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by your Lexus dealer.
When the light comes on:
Low tire inflation pressure such as
 Natural causes
 Flat tire
 Immediately stop the vehicle in a safe place.
Handling method ( P.434)
Warning lightDetails/Actions
(orange)
Indicates a malfunction in th e LTA (Lane Tracing Assist)
 Follow the instructions displayed on the multi-information display.
(  P.250)

4347-2. Steps to take in an emergency
■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.438
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
approximately 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.399)
■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).
■Conditions that the tire pressure warn-
ing system may not function properly
 P.396
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.
■If the tire pressure warning light
comes on
Be sure to observe the following precau-
tions.
Failure to do so could cause a loss of
vehicle control and result in death or
serious injury.
●Decelerate to the lowest appropriate
speed as soon as possible. Do not
drive over 50 mph (80 km/h).
●Check and adjust the tire inflation
pressure immediately.
●If the tire pressure warning light comes
on even after tire inflation pressure
adjustment, it is prob able that you have
a flat tire. Have the flat tire replaced by
the nearest Lexus dealer.
●Avoid abrupt maneuvering and brak-
ing.
If the vehicle tires deteriorate, you
could lose control of the steering
wheel or the brakes.

4397-2. Steps to take in an emergency
7
When trouble arises
■In some conditions (such as at high tem-
peratures)
For XXX/XXRXX size tires: You cannot
continue driving for up to 80 miles (50
km).
For XXX/XXRFXX size tires: You cannot
continue driving for up to 160 miles (100
km).
■For the detailed information on run-flat
tires
See the tire warranty booklet.
One of the following may be the cause
of the problem:
 There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle.
 The engine may be flooded.
Try to restart the engine again fol-
lowing correct starting procedures.
( P.174)
 There may be a malfunction in the
engine immobilizer system.
( P.64)
 There may be a malfunction in the
shift control system.
* ( P.177, 437)
*: It may not be possible to shift the shift
position from P.
One of the following may be the cause
of the problem:
 The battery may be discharged.
NOTICE
■When replacing the tires
When removing or fitting the wheels,
tires or the tire pressure warning valve
and transmitter, contact your Lexus
dealer as the tire pr essure warning valve
and transmitter may be damaged if not
handled correctly.
■When driving over bumps
If a vehicle has a flat tire, the vehicle
height will be lower than usual. Ensure
that nothing strikes the bottom of the
vehicle.
■To avoid damage to the tire pressure
warning valves and transmitters
When a tire is repaired with liquid seal-
ants, the tire pressu re warning valve and
transmitter may not operate properly. If a
liquid sealant is used , contact your Lexus
dealer or other qualified service shop as
soon as possible. Make sure to replace
the tire pressure warning valve and trans-
mitter when replacing the tire. ( P.398)
If the engine will not start
If the engine will not start even
though correct starting procedures
are being followed (P.174), con-
sider each of the following points:
The engine will not start even
though the starter motor oper-
ates normally.
The starter motor turns over
slowly, the interior lights and
headlights are dim, or the horn
does not sound or sounds at a low
volume.

4838-2. Customization
8
Vehicle specifications
■Power windows, and moon roof* or panoramic moon roof* ( P.153, 156, 158)
*:If equipped
■Reverse warning buzzer ( P.178)
■Automatic light control system ( P.190)
■Lights ( P.190)
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
Signal (buzzer) when the shift
position is in RSingleIntermittent———O
FunctionDefault settingCustomized set-ting
Light sensor sensitivityStandard-2 to 2O——O
Time elapsed before head-
lights automatically turn off
after doors are closed
30 seconds
Off
O——O60 seconds
90 seconds
Windshield wiper linked
headlight illuminationOnOff———O
FunctionDefault settingCustomized set-ting
Daytime running lightsOnOff*O——O
Welcome lightingOnOff———O
AFS (Adaptive Front-lighting
System)OnOff———O
ABCD
ABCD
ABCD
ABCD

507Alphabetical Index
Alphabetical Index
A
A/CAir conditioning filter ...............................409
Front automatic air conditioning system......................................................................... 323
Front seat concentr ated airflow mode
(S-FLOW).................................................330
Micro dust and pollen filter...................330
Rear automatic air conditioning system ......................................................................... 333
ABS (Anti-lock Brake System).............. 304 Warning light ............................................... 429
Active stabilizer suspension system .... 304
Adaptive Front-lighting System (AFS) .192
Adaptive Variable Suspension System304
AFS (Adaptive Front-lighting System) .192
AHB (Automatic High Beam) .................193
Air conditioning filter ................................. 409
Air conditioning system Air conditioning filter ...............................409
Front automatic air conditioning system......................................................................... 323
Front seat concentr ated airflow mode
(S-FLOW).................................................330
Micro dust and pollen filter...................330
Rear automatic air conditioning system ......................................................................... 333
Airbags Airbag operating conditions..................... 31
Airbag precautions for your child ........ 34
Correct driving posture .............................23
Curtain shield airbag operating condi- tions ...................................................................32
Curtain shield airbag precautions ....... 34
Front passenger occupant classification system ............................................................. 40
General airbag precautions ................... 34
Locations of airbags.................................... 29
Modification and disposal of airbags . 36
Side airbag operating conditions ..........32
Side airbag precautions ............................ 34 Side and curtain shie
ld airbags operating
conditions ...................................................... 32
Side and curtain shield airbags precau- tions .................................................................. 34
SRS airbags...................................................... 29
SRS warning light.......................................428
Alarm ................................................................... 66 Warning buzzer ......................................... 427
Anchor brackets ..................................... 46, 55
Antennas (smart acc ess system with
push-button start)........................................ 113
Anti-lock Brake System (ABS).............. 304 Warning light ............................................... 429
Approach warning...................................... 260
Armrest............................................................ 353
Assist grips ..................................................... 353
Audio system-linked display ...................... 87
Automatic headlight leveling system ..... 191
Automatic High Beam ................................193
Automatic light control system................. 191
Automatic transmission ..............................178 M mode ........................................................... 183
Paddle shift switches .......................182, 183
Snow mode.................................................... 182
Auxiliary boxes ................................. 348, 350
Average fuel economy................................. 84
Average vehicle speed ................................ 84
B
Back-up lights Replacing light bulbs ................................. 416
Battery Battery checking ......................................... 391
If the battery is discharged .................... 444
Preparing and checking before winter......................................................................... 309
Warning light ...............................................428
Blind Spot Monitor (BSM)....................... 264
Boost gauge...................................................... 86
Brake Brake hold ......................................................188
Fluid........................................................ 389, 461

508Alphabetical Index
Parking brake ............................................... 186
Warning light ............................................... 427
Brake assist .................................................... 304
Break-in tips.....................................................165
Brightness control Instrument panel light control ......... 77, 81
BSM (Blind Spot Monitor)....................... 264
Buzzer Hands off steering wheel warning (LTA)......................................................................... 249
C
Card key ............................................................ 98
Care Exterior ...........................................................368
Interior ............................................................... 371
Seat belts.......................................................... 371
Wheels and wheel ornaments............368
Cargo capacity............................................... 172
Cargo net ....................................................... 349
Center Display ...............................................316
Chains ............................................................... 310
Child restraint system Fixed with a LATCH system .................. 53
Fixed with a seat belt...................................50
Front passenger occupant classification system ............................................................. 40
Points to remember .................................... 45
Riding with children ..................................... 45
Types of child restraint system installation method ........................................................... 46
Using an anchor bracket .......................... 55
Child safety Airbag precautions...................................... 34
Battery precautions ....................... 391, 448
Child restraint system................................. 46
Heated steering wheel and seat heater precautions................................................ 336
How your child should wear the seat belt ............................................................................ 25
Moon roof precautions ............................ 157
Panoramic moon roof precautions ..... 161 Power window lock switch .................... 155
Power window precautions .................. 154
Rear door child-protectors ................... 105
Removed electronic key battery precau-
tions .................................................................. 411
Seat belt extender precautions.............. 25
Seat belt precautions .................................. 45
Trunk precautions....................................... 106
Child-protectors........................................... 105
Cleaning Exterior........................................................... 368
Interior ...............................................................371
Radar sensor ................................... 203, 209
Seat belts ..........................................................371
Wheels and wheel ornaments ........... 368
Clock ................................................75, 78, 354
Clock light ...................................................... 340
Coat hooks..................................................... 353
Coin holder .................................................... 346
Condenser ..................................................... 389
Console box .................................................. 347
Consumption screen .................................... 93
Cooling system.............................................388 Engine overheating...................................449
Cornering lights .............................................192
Cruise control Dynamic radar cruise control with full-speed range ........................... 251, 254
Cup holders ................................................... 346
Current fuel consumption .......................... 84
Curtain shield airbags .................................. 29
Customizable features ...............................476
D
Daytime running light system .................. 190
Defogger Outside rear view mirrors..................... 324
Rear window ................................................ 324
Windshield .................................................... 324
Differential Front differential oil............. ...................... 460
Rear differential oil. ..................................... 461

509Alphabetical Index
Digital Rearview Mirror..............................143
Dimension ...................................................... 456
Dinghy towing................................................. 173
DisplayCenter Display..............................................316
Dynamic radar cruise control with full-speed range ...................................... 254
Head-up display ........................................... 89
Intuitive parking assist...............................272
LTA (Lane Tracing Assist).................... 244
Multi-information display .......................... 82
Parking Support Brake function (rear pedestrians) .............................................. 296
RCD (Rear Camera Detection) ..........281
RCTA .............................................................. 279
Warning message..................................... 436
Distance until next engine oil change76, 81
Do-it-yourself maintenance .................... 375
Door courtesy lights ................................... 340
Door lock Doors.................................................................102
Smart access system with push-button start ................................................................... 113
Wireless remote control......................... 100
Doors Automatic door lock ing and unlocking
system ........................................................... 106
Door closer ................................................... 105
Door glasses ..................................................153
Door lock.........................................................102
Open door warning bu zzer ...... 103, 105
Outside rear view mirrors ....................... 151
Rear door child-protectors ................... 105
Drive distance .................................................. 84
Drive info 1/Drive info 2 .............................. 84
Driver’s seat position memory Driving position memory.........................133
Memory recall function ............................135
Power easy access system .....................133
Drive-Start Control (DSC) .......................170
Driving Break-in tips .................................................. 165 Correct driving posture ............................ 23
Driving mode select switch ..................299
Procedures .................................................... 164
Winter drive tips ........................................ 309
Driving information display ........................ 84
Driving position memory............................133 Memory recall function............................ 135
Power easy access system .................... 133
Driving range ................................................... 84
Driving support system information display ............................................................................. 87
DRS (Dynamic Rear Steering) .............. 304
DSC (Drive-Start Control) .......................170
Dynamic radar cruise control with full-speed range .............................. 251, 254Warning message .....................................263
Dynamic Rear Steering (DRS) .............. 304
E
ECB (Electronically Controlled Brake Sys-
tem) ................................................................ 304
Eco Driving Indicator............................85, 93
Eco Driving Indicator Light ........................ 85
EDR (Event data recorder) ........................... 8
Elapsed time ..................................................... 84
Electric Power Steering (EPS) .............. 304 Warning light .............................................. 430
Electronic key .................................................. 98 Battery-saving function.............................. 114
If the electronic key does not operate properly ....................................................... 442
Replacing the battery ................................ 410
Electronic roof sunshade Jam protection function ........................... 160
Operation ....................................................... 158
Electronically Controlled Brake System (ECB) ............................................................ 304
Electronically modulated air suspension ........................................................................... 301
Emergency flashers ..................................... 418
Emergency, in case of If a warning buzzer sounds................... 427