2019 Lexus ES300h warning lights

3587-2. Steps to take in an emergency
■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.
Warning lightDetails/Actions
(yellow)
Indicates a malfunction in:
 The regenerative braking system;
 The electronically controlled brake system; 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.388)

3617-2. Steps to take in an emergency
7
When trouble arises
■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 power switch is turned to ON mode, the buzzer sounds for 6 seconds.
If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer sounds once. If the seat belt
is still unfastened after 24 seconds, the buzzer will sound intermittently for 6 seconds. Then,
if the seat belt is st ill unfastened, the buzzer will sound in a different tone for 90 more sec-
onds.
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. The buzzer sounds once if the vehicle reaches a speed of 12
mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will sound
intermittently for 6 seconds. Th en, if the seat belt is still unfastened, the buzzer will sound in
a different tone for 90 more seconds.
■Rear passengers’ seat belt r eminder lights (warning buzzer)*
*: Rear passengers’ seat belt warning buzzer:
The rear passengers’ seat belt warning buzzer sounds to alert the rear passengers that his
or her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of 12
mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will sound
intermittently for 6 seconds. Th en, if the seat belt is still unfastened, the buzzer will sound in
a different tone for 30 more seconds.
Warning lightDetails/Actions
Indicates that remaining fuel is approximately 1.8 gal. (7 L, 1.5 Imp.gal.)
or less
 Refuel the vehicle.
Warning lightDetails/Actions
Warns the driver and/or front passe nger 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.

3667-2. Steps to take in an emergency
■Electric power steering system warning
light (warning buzzer)
When the 12-volt battery charge becomes
insufficient or the voltage temporarily
drops, the electric po wer steering 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.372
If none of the tires are punctured:
Turn the power switch off then turn it to ON
mode. Check if the tire pressure warning
light comes on or blinks.
If the tire pressure warning light blinks for
approximately 1 minute then stays on
There may be a malfunction in the tire pres-
sure 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.331)
■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).
■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.329
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 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.
●Stop your vehicle in a safe place as
soon as possible. Check and adjust the
tire inflation pre ssure 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. Check the tire s. If a tire is flat,
change it with the spare tire and have
the flat tire repaired by the nearest
Lexus dealer.

441What to do if... (Troubleshooting)441Alphabetical index
Alphabetical index
A
A/C ................................................................... 253Air conditioning filter ...............................338
Automatic air conditioning system ... 253
ABS (Anti-lock Brake System).............. 236 Function .......................................................... 236
Warning light ...............................................360
ACA (Active Cornering Assist) ........... 236
Active Cornering Assist (ACA) ........... 236
Adaptive Front-lighting System (AFS) .152
AFS (Adaptive Front-lighting System) .152
Airbags ............................................................... 28 Airbag operating conditions................... 30
Airbag precautions for your child ........ 33
Correct driving posture .............................23
Curtain shield airbag operating condi- tions .................................................................... 31
Curtain shield airbag precautions ....... 33
Front passenger occupant classification system ..............................................................37
General airbag precautions ................... 33
Locations of airbags.................................... 28
Modification and disposal of airbags . 35
Side airbag operating conditions ........... 31
Side airbag precautions ............................ 33
Side and curtain shield airbags operating conditions........................................................ 31
Side and curtain shield airbags precau- tions .................................................................. 33
SRS airbags ..................................................... 28
SRS warning light ......................................359
Air conditioning filter ................................. 338
Air conditioning system ............................ 253 Air conditioning filter ...............................338
Automatic air conditioning system ... 253
Alarm ................................................................... 62 Alarm .................................................................. 62
Warning buzzer ........................................ 358
Anchor brackets ...................................... 43, 51
Antennas (smart access system with push- button start) ..................................................102 Anti-lock Brake System (ABS).............. 236
Function ..........................................................236
Warning light .............................................. 360
Approach warning........................................193
Armrest..............................................................281
Assist grips .......................................................281
Audio system-linked display ...................... 75
Auto Glide Control .................................... 203
Automatic headlight leveling system ..... 151
Automatic High Beam ................................153
Automatic light control system............... 150
Auxiliary box.................................................. 270
Average fuel economy..................................74
Average vehicle speed .................................74
B
Back-up lights Replacing light bulbs ................................344
Battery (12-volt battery) ........................... 323 Battery checking ........................................ 323
If the 12-volt battery is discharged ... 384
Preparing and checking before winter.......................................................................... 242
Warning light .............................................. 359
Battery (traction batter y) ............................ 56
Blind Spot Monitor (BSM)......................... 197
Brake Brake hold ...................................................... 148
Fluid.................................................................. 398
Parking brake ............................................... 146
Regenerative braking ................................. 54
Warning light .............................................. 358
Brake assist .................................................... 236
Break-in tips..................................................... 127
Brightness control Instrument panel light control................. 72
BSM (Blind Spot Monitor)......................... 197
C
Care ...................................................... 300, 303 Aluminum wheels ..................................... 300

442Alphabetical index
Exterior .......................................................... 300
Interior .............................................................303
Seat belts........................................................303
Cargo capacity...............................................133
Cargo hooks ................................................... 271
Center Display ............................................. 246
Chains .............................................................. 243
Child-protectors............................................. 94
Child restraint system................................... 42 Fixed with a LATCH system .................. 49
Fixed with a seat belt................................... 46
Front passenger occupant classification system ..............................................................37
Points to remember .....................................42
Riding with children ......................................42
Types of child restraint system installation method ........................................................... 43
Using an anchor bracket ............................ 51
Child safety ....................................................... 42 12-volt battery precautions ....... 324, 387
Airbag precautions...................................... 33
Child restraint system................................. 43
Heated steering wheel and seat heater precautions.................................................. 261
How your child should wear the seat belt ............................................................................ 25
Moon roof precautions ............................ 123
Power window lock switch.......................121
Power window precautions .....................121
Rear door child-protectors ..................... 94
Removed electronic key battery precau- tions ...............................................................340
Seat belt extender precautions ............. 25
Seat belt precautions ...................................42
Trunk precautions ........................................ 95
Cleaning.............................................. 300, 303 Aluminum wheels ..................................... 300
Exterior .......................................................... 300
Interior .............................................................303
Radar sensor.......................................163, 198
Seat belts........................................................303
Clock ........................................................ 70, 272 Coat hooks..................................................... 283
Compass ......................................................... 289
Condenser .......................................................321
Console box .................................................. 269
Console box light ........................................ 269
Cooling system............................................. 320
Engine overheating.................................. 388
Hybrid system overheating ................. 389
Cornering lights .............................................152 Replacing light bulbs ................................344
Cruise control Dynamic radar cruise control with full-
speed range ............................................... 187
Cup holder ..................................................... 269
Current fuel consumption ...........................74
Curtain shield airbags .................................. 28
Customizable features ................................ 412
D
Daytime running light system .................. 150
Defogger Outside rear view mirrors.....................254
Rear window ................................................254
Windshield ....................................................254
Dimension ...................................................... 394
Dinghy towing.................................................134
Display BSM (Blind Sport Monitor)....................197
Dynamic radar cruise control with full-
speed range ............................................... 187
Energy monitor ............................................... 81
Head-up display.............................................77
Intuitive parking assist ............................. 205
LTA (Lane-Tracing Assist) ...................... 181
Multi-information display .......................... 73
Parking Support Brake function (rear pedestrians)............................................... 233
RCD (Rear Camera Detection) ......... 215
RCTA.................................................................. 211
Warning message .................................... 368
Distance until next engine oil change .....72
Do-it-yourself maintenance ..................... 310

443What to do if... (Troubleshooting)Alphabetical index443
Door courtesy lights ................................... 265
Door lockDoors.................................................................... 91
Smart access system with push-button start ..................................................................102
Wireless remote control........................... 89
Doors ..................................................................... 91 Automatic door lock ing and unlocking
system ............................................................. 94
Door glasses ..................................................120
Door lock............................................................ 91
Open door warning buzzer .......... 92, 94
Outside rear view mirrors ........................117
Rear door child-protectors ..................... 94
Drive distance ...................................................74
Drive info 1/Drive info 2 ...............................74
Driver’s seat position memory .................. 110 Driving position memory.......................... 110
Memory recall function ............................... 111
Drive-start control ........................................ 127
Driving................................................................ 126 Break-in tips ................................................... 127
Correct driving posture .............................23
Driving Mode Select switch................. 202
Hybrid vehicle driving tips .................... 240
Procedures ..................................................... 126
Winter drive tips......................................... 242
Driving information display .........................74
Driving Mode Select switch.................... 202
Driving range ....................................................74
Driving support system information display ..............................................................................75
Dynamic radar cruise control with full- speed range..................................................187Warning message...................................... 195
E
ECB (Electronically Controlled Brake Sys- tem) ................................................................ 236
Eco drive mode ............................................ 202
EDR (Event data recorder) ........................... 8
Elapsed time ......................................................74 Electric motor (traction motor) ................ 53
Electric Power Steering (EPS)
Function ..........................................................236
Warning light .............................................. 360
Electronically Controlled Brake System (ECB) ............................................................ 236
Electronic key .................................................. 88 Battery-saving function............................ 103
If the electronic key does not operate properly ........................................................ 381
Replacing the battery ...............................339
Emergency, in case of If a warning buzzer sounds.................. 358
If a warning light turns on...................... 358
If a warning message is displayed .... 368
If the 12-volt battery is discharged ... 384
If the electronic key does not operate properly ........................................................ 381
If the fuel filler do or cannot be opened
........................................................................... 381
If the hybrid system will not start ........ 379
If the vehicle is trapped in rising water ........................................................................... 351
If you have a flat tire .................................. 372
If you lose your keys ................................ 380
If you think something is wrong......... 356
If your vehicle becomes stuck .............. 391
If your vehicle has to be stopped in an emergency ................................................ 350
If your vehicle needs to be towed .....353
If your vehicle overheats ....................... 388
Emergency flashers ....................................350
Energy monitor .................................................81
Engine ACCESSORY mode................................137
Compartment............................................... 318
Hood ................................................................. 316
How to start the hybrid system............ 135
Identification number .............................. 395
If the hybrid system will not start ........ 379
If your vehicle has to be stopped in an emergency ................................................ 350

444Alphabetical index
Ignition switch (power switch) ..............135
Overheating................................................ 388
Power switch .................................................135
Tachometer ..................................................... 70
Engine coolant.............................................. 320 Capacity ......................................................... 397
Checking ....................................................... 320
Preparing and checking before winter......................................................................... 242
Engine coolant temperature gauge ....... 70
Engine oil ......................................................... 318 Capacity .........................................................396
Checking ........................................................ 318
Preparing and checking before winter......................................................................... 242
Warning light ...............................................359
Engine oil maintenance data .................. 320
EPS (Electric Power Steering) .............. 236 Function .......................................................... 236
Warning light ...............................................360
EV drive mode................................................139
Event data recorder (EDR) ........................... 8
EV indicator ...................................................... 54
F
Flat tire ............................................................. 372 Tire pressure warning system ............. 328
Floor mats ...........................................................22
Fluid Brake................................................................398
Hybrid transmission .................................398
Washer ........................................................... 322
Footwell light ................................................. 265
Front passenger occupant classification system ...............................................................37
Front seats ....................................................... 109 Adjustment..................................................... 109
Cleaning.........................................................303
Correct driving posture .............................23
Driving position memory.......................... 110
Head restraints .............................................. 113
Memory recall function ............................... 111 Power easy access system ...................... 110
Seat heaters ....................................................261
Seat position memory ................................ 110
Seat ventilators ..............................................261
Front side marker light ............................... 150 Light switch .................................................... 150
Front side marker lights Replacing light bulbs ....................344, 345
Front turn signal lights .................................145 Replacing light bulbs ....................344, 345
Turn signal lever .......................................... 145
Fuel ....................................................................... 161 Capacity ........................................................ 395
Fuel gauge ........................................................ 70
Information ..................................................... 401
Refueling............................................................ 161
Type ................................................................. 395
Warning light ................................................ 361
Fuel consumption Average fuel economy .............................. 74
Current fuel consumption ........................ 74
Fuel filler door .................................................. 161 If the fuel filler do or cannot be opened
........................................................................... 381
Refueling............................................................ 161
Fuel gauge ......................................................... 70
Fuses ...................................................................341
G
Garage door opener ................................. 284
Gauges ............................................................... 70
Glove box ....................................................... 269
Glove box light ............................................. 269
Grocery bag hooks ...................................... 271
H
Hands Free Power Trunk Lid .................... 98
Headlights ....................................................... 150 Adaptive Front-lighting System (AFS)........................................................................... 152
Automatic High Beam system ............. 153

445What to do if... (Troubleshooting)Alphabetical index445
Light switch .................................................... 150
Replacing light bulbs................................ 344
Headlights aim .............................................. 343
Head restraints ................................................ 113
Head-up display............................................... 77 Driving information display area............ 77
Driving support system display area .. 79
HUD (Head-up display) switch............ 78
Hybrid System Indicator ...........................80
Navigation system-linked display ......... 77
Pop-up display............................................... 79
Settings .............................................................. 78
Heated steering wheel ................................ 261
Heaters Air conditioning system.......................... 253
Heated steering wheel.............................. 261
Outside rear view mirrors .................... 254
Seat heaters .................................................... 261
High mounted stoplight Replacing light bulbs................................ 344
High-voltage components ......................... 56
Hill-start assist control ............................... 236
Hood ...................................................................316 Open .................................................................316
Hooks Cargo hooks.................................................. 271
Coat hooks ................................................... 283
Grocery bag hooks ................................... 271
Retaining hooks (floor mat)......................22
Horn ..................................................................... 116
HUD (Head-up display) switch................ 78
Hybrid battery (traction battery) Location............................................................. 56
Specification .................................................396
Warning message........................................ 59
Hybrid battery (traction battery) air vents ............................................................................. 58
Hybrid system .................................................. 53 Emergency shut off system ..................... 59
Energy monitor/consumption screen .81
EV drive mode .............................................139
High voltage components ....................... 56 Hybrid system precautions......................56
Hybrid vehicle driving tips ....................240
If the hybrid system will not start ........ 379
Overheating ................................................ 389
Power (ignition) switch ............................ 135
Regenerative braking ................................. 54
Starting the hybrid system ...................... 135
Vehicle proximity noti
fication system.55
Hybrid System Indicator....................... 71, 80
Hybrid transmission....................................... 141 Paddle shift switches ....................... 143, 144
S mode ..............................................................144
I
I/M test ..............................................................313
IdentificationEngine............................................................. 395
Vehicle ............................................................394
Ignition switch (power switch) .................135
Auto power off function............................137
Changing the power switch modes ..137
If your vehicle has to be stopped in an emergency ................................................ 350
Starting the hybrid system ...................... 135
Immobilizer system........................................ 60
Indicators ............................................................67
Initialization Items to initialize ......................................... 423
Maintenance.................................... 309, 320
Power windows ........................................... 120
Tire pressure warning system .............. 331
Inside rear view mirror ................................. 116
Instrument panel light co ntrol ....................72
Interior lights.................................................. 265
Intuitive parking assist.................... 204, 205 Function ......................................................... 205
Warning message ..................................... 207
J
JackPositioning a floor jack ............................. 316