2020 LEXUS LS500 warning lights

4197-2. 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 parking brake system
 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.444)

4227-2. Steps to take in an emergency
■Electric power steering system warning light (warning buzzer)
■Low fuel level warning light
■Driver’s and front passenger’s seat belt reminder light (warning buzzer)*
*: Driver’s seat belt warning buzzer:
The driver’s seat belt warning buzzer sounds to al ert the driver that his or her seat belt is not
fastened. Once the engine switch is turned to IGNITION ON mode, the buzzer sounds. If
the seat belt is still unfastened, the buzzer sounds intermittently for a certain period of time
after the vehicle reaches a certain speed.
Front passenger’s seat belt warning buzzer:
The front passenger’s seat belt warning buzzer sounds to alert the front passenger that his
or her seat belt is not fastened. If the seat be lt is unfastened, the buzzer sounds intermittenly
for a certain period of time after the vehicle reaches a certain speed.
■Rear passengers’ seat belt reminder lights*1 (warning buzzer)*2
Warning lightDetails/Actions
(red)
or
(yellow)
Indicates a malfunction in the EPS (Electric Power Steering) system
Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that remaining fuel is approximately 3.4 gal. (13 L, 2.8 Imp.
gal.) or less
 Refuel the vehicle.
Warning lightDetails/Actions
Warns the driver and/or front pass enger to fasten their seat belts
 Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s seat
belt also needs to be fastened to make the warning light (warning
buzzer) turn off.
Warning lightDetails/Actions
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.

4277-2. Steps to take in an emergency
7
When trouble arises
pressure warning system. 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.392)
■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
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.390
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 braking, 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 steering 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.
■If a blowout or sudden air leakage
should occur
The tire pressure warning system may
not activate immediately.
■Maintenance of the tires
Each tire, including the spare (if pro-
vided), should be checked monthly when
cold and inflated to the inflation pressure
recommended by the vehicle manufac-
turer on the vehicle placard or tire infla-
tion pressure label (tire and load
information label). (If your vehicle has
tires of a different size than the size indi-
cated on the vehicle placard or tire infla-
tion pressure label [tire and load
information label], you should determine
the proper tire inflation pressure for
those tires.)

4347-2. Steps to take in an emergency
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.165)
 There may be a malfunction in the
engine immobilizer system.
( P.63)
 There may be a malfunction in the
shift control system.
* ( P.168, 432)
*: 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 pressure 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.391)
If the engine will not start
If the engine will not start even
though correct starting procedures
are being followed ( P.165), 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.

4778-2. Customization
8
Vehicle specifications
■Power windows, and moon roof* or panoramic moon roof* ( P.143, 146, 148)
*:If equipped
■Reverse warning buzzer ( P.169)
■Automatic light control system ( P.180)
■Lights ( P.180)
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*1O——O
Welcome lightingOnOff———O
AFS (Adaptive Front-lighting
System)
*2OnOff———O
ABCD
ABCD
ABCD
ABCD

499Alphabetical Index
Alphabetical Index
A
A/CAir conditioning filter ............................... 402
Front automatic air conditioning system........................................................................... 317
Front seat concentr ated airflow mode
(S-FLOW)................................................. 324
Micro dust and pollen filter................... 323
Rear automatic air conditioning system ......................................................................... 327
ABS (Anti-lock Brake System).............. 297 Warning light ................................................. 421
Active stabilizer suspension system .... 298
Adaptive Front-lighting System (AFS) .182
Adaptive Variable Suspension System298
AFS (Adaptive Front-lighting System) .182
AHB (Automatic High Beam) ................ 183
Air conditioning filter ................................. 402
Air conditioning system Air conditioning filter ............................... 402
Front automatic air conditioning system........................................................................... 317
Front seat concentr ated airflow mode
(S-FLOW)................................................. 324
Micro dust and pollen filter................... 323
Rear automatic air conditioning system ......................................................................... 327
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 ............................................................. 39
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.......................................420
Alarm ................................................................... 65 Warning buzzer .......................................... 419
Anchor brackets ..................................... 46, 55
Antennas (smart acc ess system with
push-button start)..........................................111
Anti-lock Brake System (ABS).............. 297 Warning light .................................................421
Approach warning.......................................247
Armrest............................................................ 347
Assist grips ..................................................... 347
Audio system-linked display ...................... 85
Automatic headlight leveling system ..... 181
Automatic High Beam ............................... 183
Automatic light control system............... 180
Automatic transmission ..............................169 M mode ............................................................174
Paddle shift switches ........................173, 174
Snow mode..................................................... 172
Auxiliary boxes .................................. 342, 344
Average fuel economy................................. 82
Average vehicle speed ................................ 82
B
Back-up lights Replacing light bulbs ............................... 408
Battery Battery checking ....................................... 385
If the battery is discharged ....................439
Preparing and checking before winter......................................................................... 303
Warning light ...............................................420
Blind Spot Monitor (BSM).........................251
Boost gauge...................................................... 84
Brake Brake hold ...................................................... 178
Fluid...................................................... 383, 455

500Alphabetical Index
Parking brake ................................................ 176
Warning light .................................................419
Brake assist .................................................... 297
Break-in tips.................................................... 155
Brightness control Instrument panel light control ........75, 79
BSM (Blind Spot Monitor).........................251
Buzzer Hands off steering wheel warning (LTA)......................................................................... 237
C
Card key ............................................................ 96
Care Aluminum wheels ...................................... 362
Exterior ........................................................... 362
Interior .............................................................365
Seat belts........................................................365
Cargo capacity...............................................163
Cargo net ....................................................... 343
Center Display .............................................. 310
Chains .............................................................. 304
Child restraint system Fixed with a LATCH system .................. 53
Fixed with a seat belt................................... 49
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 .......................... 55
Child safety Airbag precautions...................................... 34
Battery precautions ..................... 385, 443
Child restraint system................................. 46
Heated steering wheel and seat heater precautions................................................330
How your child should wear the seat belt ............................................................................ 25
Moon roof precautions ............................ 147
Panoramic moon roof precautions ..... 151 Power window lock switch .................... 145
Power window precautions ...................144
Rear door child-protectors ................... 103
Removed electronic key battery precau-
tions .............................................................. 404
Seat belt extender precautions.............. 25
Seat belt precautions .................................. 45
Trunk precautions....................................... 104
Child-protectors........................................... 103
Cleaning Aluminum wheels ......................................362
Exterior............................................................362
Interior ............................................................ 365
Radar sensor .......................................193, 199
Seat belts ....................................................... 365
Clock ................................................73, 76, 348
Clock light ...................................................... 334
Coat hooks..................................................... 347
Coin holder .................................................... 340
Condenser ..................................................... 383
Console box ....................................................341
Consumption screen ...................................... 91
Cooling system............................................. 382 Engine overheating................................... 444
Cornering lights .............................................182
Cruise control Dynamic radar cruise control with full-speed range ........................... 238, 241
Cup holders ................................................... 340
Current fuel consumption .......................... 82
Curtain shield airbags .................................. 29
Customizable features .............................. 470
D
Daytime running light system .................. 180
Defogger Outside rear view mirrors...................... 318
Rear window ................................................. 318
Windshield ..................................................... 318
Differential Front differential oil............. .......................454
Rear differential oil......... ..................... ...... 455

501Alphabetical Index
Dimension ...................................................... 450
Dinghy towing.................................................164
DisplayCenter Display............................................. 310
Dynamic radar cruise control with full-speed range ........................................ 241
Head-up display ........................................... 87
Intuitive parking assist.............................. 259
LTA (Lane Tracing Assist).................... 232
Multi-information display ..........................80
Parking Support Brake function (rear pedestrians) ..............................................289
RCD (Rear Camera Detection) ........ 270
RCTA .............................................................. 266
Warning message..................................... 429
Distance until next engine oil change ...74, 79
Do-it-yourself maintenance .................... 369
Door courtesy lights ................................... 334
Door lock Doors................................................................ 100
Smart access system with push-button start ..................................................................... 111
Wireless remote control........................... 98
Doors Automatic door lock ing and unlocking
system ........................................................... 104
Door closer ................................................... 103
Door glasses ..................................................143
Door lock........................................................ 100
Open door warning bu zzer ........ 101, 103
Outside rear view mirrors ........................141
Rear door child-protectors ................... 103
Drive distance .................................................. 82
Drive info 1/Drive info 2 .............................. 82
Driver’s seat position memory Driving position memory........................ 130
Memory recall function ............................133
Power easy access system .................... 130
Drive-start control ....................................... 155
Driving Break-in tips .................................................. 155 Correct driving posture ............................ 23
Driving mode select switch .................. 292
Procedures .................................................... 154
Winter drive tips ........................................ 303
Driving information disp lay ........................ 82
Driving position memory........................... 130 Memory recall function............................ 133
Power easy access system .................... 130
Driving range ................................................... 82
Driving support system information display ............................................................................. 85
DRS (Dynamic Rear Steering) .............. 298
Dynamic radar cruise control with full-speed range .............................. 238, 241Warning message ..................................... 249
Dynamic Rear Steering (DRS) .............. 298
E
ECB (Electronically Controlled Brake Sys-
tem) ................................................................ 297
Eco Driving Indicator............................. 83, 91
Eco Driving Indicator Light ........................ 83
EDR (Event data recorder) ............................7
Elapsed time ..................................................... 82
Electric Power Steering (EPS) .............. 298 Warning light ............................................... 422
Electronic key .................................................. 96 Battery-saving function.............................. 112
If the electronic key does not operate properly ....................................................... 437
Replacing the battery .............................. 403
Electronic roof sunshade Jam protection function ........................... 150
Operation ....................................................... 148
Electronically Controlled Brake System (ECB) ............................................................ 297
Electronically modulated air suspension .......................................................................... 294
Emergency flashers ..................................... 410
Emergency, in case of If a warning buzzer sounds.................... 419
If a warning light turns on........................ 419