2020 TOYOTA COROLLA warning light

570What to do if... (Troubleshooting)
COROLLA_U
 The seat belt reminder light is
flashing
Are the driver and the passenger
wearing the seat belts? ( 
P.484)
The parking brake indicator is
on
Is the parking brake released?
(
P.163, 164)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.481, 490)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the alarm
sounds. ( 
P. 6 9)
Do one of the following to deac-
tivate or stop the alarms:
Unlock the doors.
 Turn the engine switch to
ACC or ON, or start the
engine. (The alarm will be
deactivated or stopped after a
few seconds.)
 Is the electronic key left inside
the vehicle?
Check the message on the
multi-information display. ( 
P. 4 9 0)
When a warning light turns on
or a warning message is dis-
played, refer to P.481, 490.
 Vehicles with an emergency
tire puncture repair kit: Stop
the vehicle in a safe place and
repair the flat tire temporarily
with the emergency tire punc-
ture repair kit. ( P.493)
 Vehicles with a spare tire:
Stop the vehicle in a safe
place and replace the flat tire
with the spare tire. ( P.503)
 Try the procedure for when
the vehicle becomes stuck in
mud, dirt, or snow. ( P.521)
An alarm is activated and
the horn sounds (vehicles
with an alarm)
A warning buzzer sounds
when leaving the vehicle
(vehicles with a smart key
system)
A warning light turns on
or a warning message is
displayed
When a problem has
occurred
If you have a flat tire
The vehicle becomes
stuck

5711-1. What to do if... (Troubleshooting)
COROLLA_U571Alphabetical Index
Alphabetical Index
A
A/C Air conditioning filter ............. 457
Automatic air conditioning sys-tem ..................................... 391
Manual air conditioning system ........................................... 386
ABS (Anti-lock Brake System) ............................................... 250Warning light ........................ 483
ACA (Active Cornering Assist) ............................................... 251
Active Cornering Assist (ACA) ............................................... 251
Adaptive Front-lighting System (AFS)...................................... 172
AFS (Adaptive Front-lighting System) ................................. 172
Air conditioning filter ............. 457
Air conditioning system Air conditioning filter ............. 457
Automatic air conditioning sys-tem ..................................... 391
Manual air conditioning system ........................................... 386
Airbags Airbag operating conditions.... 31
Airbag precautions for your child............................................. 34
Correct driving posture ........... 23
Curtain shield airbag operating conditions ............................. 32
Curtain shield airbag precautions ............................................. 34
Front passenger occupant clas- sification system ................... 39
General airbag precautions .... 34
Locations of airbags ............... 29
Modification and disposal of air- bags ..................................... 37 Side airbag operating conditions
.............................................32
Side airbag precautions..........34
Side and curtain shield airbags operating conditions .............32
Side and curtain shield airbags precautions ...........................34
SRS airbags ...........................29
SRS warning light .................482
Alarm Alarm ......................................69
Warning buzzer ....................481
AM ............................................307
Anchor brackets .................48, 58
Antennas (smart key system) 111
Anti-lock Brake System (ABS) ...............................................250Warning light.........................483
Apple CarPlay .................292, 293
Approach warning ..........219, 229
Apps button (Menu screen) ...263
Armrest ......... ......................... ..413
Assist grips .............................413
Audio .......................................302 Audio source ........................303
Operating information ...........324
Reordering the audio source 303
Screen adjustment ...............305
Some basics .........................303
Sound settings......................304
Turning the system on and off...........................................303
USB/AUX port ......................304
Voice command system .......306
AUDIO button ..........................261
Audio button (Menu screen) ..263
Audio settings.........................323 Common settings .................323
Radio settings.......................323
Audio source...........................303
Audio system-linked display ...90

572Alphabetical Index
COROLLA_U
Automatic air conditioning sys- tem ......................................... 391
Automatic headlight leveling system ................................... 171
Automatic High Beam ............ 173
Automatic light control system ............................................... 171
AUX .......................................... 319
Average fuel economy ............. 88
Average vehicle speed............. 90
B
Back-up lights Replacing light bulbs ............ 469
Wattage ................................ 533
Battery Battery checking................... 442
If the battery is discharged ... 515
Preparing and checking before winter.................................. 255
Warning light ........................ 482
Blind Spot Monitor (BSM) ...... 236
Bluetooth
® audio .................... 316
Registering/Connecting a Blue- tooth
® device...................... 318
Bluetooth® button (Setup
screen) .................................. 266
Bluetooth
® details settings ... 280
Bluetooth® setup screen ...... 280
Connecting a Bluetooth® device
........................................... 281
Deleting a Bluetooth
® device283
Detailed settings screen ....... 285
Displaying the Bluetooth
® setup
screen ................................ 280
Editing the Bluetooth
® device
information ......................... 283
Registering a Bluetooth
® device
........................................... 282
Bluetooth
® device information
............................................... 283 Bluetooth
® hands-free system
...............................................345
Bluetooth
® phone message func-
tion .........................................356 Calling the message sender .359
Checking received messages ...........................................357
Displaying the message screen ...........................................356
Receiving a mess age ...........356
Replying to a message (dicta- tion reply)............................358
Replying to a message (quick reply) ..................................358
Bottle holders .........................401
Brake Brake hold ............................167
Fluid..............................441, 530
Parking brake ...............163, 164
Warning light.........................481
Brake assist ............................250
Break-in tips ............................136
Brightness control Instrument panel light control79, 84
BSM (Blind Spot Monitor) ......236
C
Care Aluminum wheels .................422
Exterior .................................422
Interior ..................................424
Seat belts .............................424
Cargo capacity ........................145
Chains......................................256
Child restraint system Fixed with a LATCH system ...56
Fixed with a seat belt..............51
Front passenger occupant clas-sification system ...................39
Points to remember ................46
Riding with children ................45

5731-1. What to do if... (Troubleshooting)
COROLLA_U573Alphabetical Index
Types of child restraint system installation method ............... 48
Using an anchor bracket ........ 58
Child safety Airbag precautions ................. 34
Battery precautions ...... 443, 519
Child restraint system............. 48
Heated steering wheel and seat heater precautions ............. 396
How your child should wear the seat belt................................ 26
Moon roof precautions ......... 131
Power window lock switch.... 129
Power window precautions .. 128
Rear door child-protectors.... 107
Removed electronic key battery precautions......................... 460
Seat belt extender precautions ............................................. 26
Seat belt precautions ............. 45
Trunk precautions................. 108
Child-protectors ..................... 107
Cleaning Aluminum wheels ................. 422
Exterior ................................. 422
Interior .................................. 424
Radar sensor........................ 181
Seat belts ............................. 424
Clock ............... 77, 79, 81, 84, 297
Coat hooks .............................. 413
Command list ......................... 339
Condenser .............................. 440
Console box ............................ 402
Consumption screen................ 92
Continuously variable transmis- sion ................................ 153, 155If the shift lever cannot be shifted from P......................... 154, 157
M mode ................................ 158
Paddle shift switches.... 157, 158
Cooling system ...................... 440 Engine overheating .............. 519 Cruise control
Dynamic radar cruise control 223
Dynamic radar cruise control with full-speed range ..........213
Cup holders.............................401
Current fuel consumption........88
Curtain shield airbags ..............29
Customizable features ...........548
D
Daytime running light system170
DCM .................................377, 378
Defogger Outside rear view mirrors ...388, 392
Rear window.................388, 392
Windshield ....................387, 392
Dimensions .............................524
Dinghy towing .........................146
Display Dynamic radar cruise control 223
Dynamic radar cruise control with full-speed range ..........213
LDA (Lane Departure Alert with steering control)..................210
LTA (Lane-Tracing Assist) .....201
Multi-information display.........86
Warning message.................490
Display change button .......78, 83
Do-it-yourself maintenance ...428
Door lock Doors ....................................103
Key .......................................104
Smart key system ................. 111
Wireless remote control..........98
Doors Automatic door locking and unlocking system ................107
Door glasses ........................127
Door lock ..............................103
Open door warning buzzer .105, 107

574Alphabetical Index
COROLLA_U
Outside rear view mirrors ..... 125
Rear door child-protectors.... 107
Side doors ............................ 103
Drive distance ........................... 90
Drive information ..................... 90
Drive-start control .................. 136
Driving Break-in tips ......................... 136
Correct driving posture ........... 23
Driving mode select switch... 249
Procedures ........................... 134
Winter drive tips ................... 255
Driving information display ..... 87
Driving range ............................ 88
Driving support system informa- tion display ............................. 89
Dynamic radar cruise control 223 Warning message ................ 231
Dynamic radar cruise control with full-speed range ........... 213Warning message ................ 222
E
Eco Driving Indicator ............... 88
Eco Driving Indicator Light ..... 88
EDR (Event data recorder)......... 8
Elapsed time ............................. 90
Electric Power Steering (EPS) ............................................... 251Warning light ........................ 484
Electronic key ........................... 96 Battery-saving function......... 112
If the electronic key does not operate properly ................. 513
Replacing the battery ........... 458
Emergency flashers ............... 472
Emergency tire puncture repair kit ........................................... 493
Emergency, in case of If a warning buzzer sounds .. 481
If a warning light turns on ..... 481 If a warning message is dis-
played .................................490
If the battery is discharged ...515
If the electronic key does not operate properly .................513
If the engine will not start...... 511
If the vehicle is trapped in rising water...................................474
If you have a flat tire .....493, 503
If you lose your keys.............513
If you think something is wrong ...........................................479
If your vehicle becomes stuck ...........................................521
If your vehicle has to be stopped in an emergency .................472
If your vehicle ne eds to be towed
...........................................475
If your vehicle overheats ......519
Enform App Suite button (Setup screen) ...................................266
Engine ACCESSORY mode .............151
Compartment........................436
Engine switch ...............147, 148
Fuel pump shut off system ...480
Hood .....................................434
How to start the engine 147, 148
Identification number ............525
If the engine will not start...... 511
If your vehicle has to be stopped in an emergency .................472
Ignition switch (engine switch) ...................................147, 148
Overheating ..........................519
Tachometer.......................77, 81
Engine coolant Capacity ...............................528
Checking ..............................440
Preparing and checking before winter ..................................255

5751-1. What to do if... (Troubleshooting)
COROLLA_U575Alphabetical Index
Engine coolant temperature gauge................................. 77, 81
Engine immobilizer system ..... 67
Engine oil Capacity ....................... 526, 527
Checking .............................. 437
Preparing and checking before winter.................................. 255
Warning light ........................ 482
Engine switch ................. 147, 148 Auto power off function ........ 151
Changing the engine switch modes ................................ 151
If your vehicle has to be stopped in an emergency................. 472
Enhanced VSC ........................ 251
Entering letters and num- bers/list screen operation ... 271Entering letters and numbers271
List screen ............................ 272
Entune Audio buttons overview ............................................... 261
EPS (Electric Power Steering) ............................................... 251Warning light ........................ 484
Establishing an Apple CarPlay connection ............................ 292
Event data record er (EDR)......... 8
F
Flat tire
Tire pressure warning system........................................... 447
Vehicles with a spare tire ..... 503
Vehicles without a spare tire 493
Floor mats ................................. 22
Fluid Brake .................................... 530
Clutch ................................... 530
Continuously variable transmis-sion..................................... 529
Washer ................................. 443 FM ............................................307
Front passenger occupant clas-
sification system ....................39
Front seats Adjustment ........................... 118
Cleaning ...............................424
Correct driving posture ...........23
Head restraints .....................121
Seat heaters .........................396
Front side marker lights Light switch...........................170
Replacing light bulbs ............466
Wattage ................................533
Front turn signal lights Replacing light bulbs ............465
Turn signal lever ...................162
Wattage ................................533
Front turn signal/parking lights Replacing light bulbs ............465
Fuel Capacity ...............................526
Fuel gauge .......................77, 81
Fuel pump shut off system ...480
Information ......... ..................535
Refueling ..............................178
Type......................................526
Warning light.........................484
Fuel consumption Average fuel economy ............88
Current fuel consumption .......88
Fuel economy ...........................88
Fuel filler door Refueling ..............................178
Fuel gauge...........................77, 81
Fuel pump shut off system ....480
Fuses .......................................461
G
Garage door open er ...............414
Gauges ................................77, 81
General button (Setup screen) .......................................266, 296

576Alphabetical Index
COROLLA_U
General settings ..................... 296 Displaying the general settings screen ................................ 296
General settings screen ....... 296
Glove box ................................ 401
Glove box light ....................... 401
H
Hands-free system ................. 345
Head restraints ....................... 121
Headlights Adaptive Front-lighting System (AFS) .................................. 172
Automatic High Beam system ........................................... 173
Light switch .......................... 170
Headlights/daytime running lightsReplacing light bulbs ............ 465
Heated steering wheel ........... 396
Heaters Automatic air conditioning sys-tem ..................................... 391
Heated steering wheel ......... 396
Manual air conditioning system ........................................... 386
Outside rear view mirrors ... 388, 392
Seat heaters ......................... 396
High mounted stoplight Replacing light bulbs ............ 465
Hill-start assist control .......... 251
HOME button .......................... 270
Home screen ........................... 270
Hood Open .................................... 434
Hooks Coat hooks ........................... 413
Retaining hooks (floor mat) .... 22
Horn ......................................... 123
I
I/M test .....................................431
Identification Engine ..................................525
Vehicle ..................................524
Ignition switch (engine switch) .......................................147, 148Auto power off function .........151
Changing the engine switch modes.................................151
If your vehicle has to be stopped in an emergency .................472
Illuminated entry system .......399
Indicators ..................................74
Info button (Menu screen) .....263
Initial screen............................267 Caution screen .....................267
Restarting the system ...........267
Initialization Items to initialize ...................556
Maintenance .........................428
Power windows ....................127
Tire pressure warning system...........................................450
Inside rear view mirror ...........124
Instrument panel light control79,
84
Interior lights...........................398 Front interior light .................398
Rear interior light ..................398
Wattage ................................533
Internet radio...........................309
iPod/iPhone .............................313
J
Jack Positioning a floor jack .........435
Vehicle-equipped jack ..494, 504
Jack handle .....................494, 504
Jam protection function Moon roof .............................130

5771-1. What to do if... (Troubleshooting)
COROLLA_U577Alphabetical Index
Power windows .................... 127
K
Keyless entry Smart key system................. 111
Wireless remote control ......... 98
Keys Battery-saving function......... 112
Electronic key ......................... 96
Engine switch ............... 147, 148
If the electronic key does not operate properly ................. 513
If you lose your keys ............ 513
Key number plate ................... 96
Keyless entry................ 103, 111
Mechanical key ...................... 96
Replacing the battery ........... 458
Warning buzzer .................... 112
Wireless remote control ......... 98
Knee airbags ............................. 29
L
Lane Departure Alert with steer- ing control (LDA)Operation ............................. 205
Warning messages............... 212
Lane Tracing Assist (LTA) Operation ............................. 195
Warning messages............... 204
Language (multi-information dis- play) ......................................... 90
LATCH anchors ........................ 56
LDA (Lane Departure Alert with steering control)Operation ............................. 205
Warning messages............... 212
LDA (Lane Departure Alert with steering control) switch ....... 209
LED accent lights Light switch .......................... 170
Replacing light bulbs ............ 465 Lever
Auxiliary catch le ver .............434
Hood lock releas e lever ........434
Internal trunk release lever ... 111
Shift lever .............153, 155, 160
Turn signal lever ...................162
Wiper lever ...........................176
License plate lights Light switch...........................170
Replacing light bulbs ............465
Wattage ................................533
Light bulbs Replacing .............................464
Lights Automatic High Beam system...........................................173
Front interior lights................398
Headlight switch ...................170
Interior lights .........................398
Interior lights list ...................398
Personal lights ......................399
Rear interior lights ................398
Replacing light bulbs ............465
Trunk light ............................. 110
Turn signal lever ...................162
Vanity lights ..........................412
Wattage ................................533
Linking multi-information display and the system .....................275
Lock steering column ....147, 149
LTA (Lane Tracing Assist) Operation..............................195
Warning messages ...............204
M
MaintenanceDo-it-yourself maintenance ..432
General maintenance ...........428
Maintenance data .................524
Maintenance requirements ...427
Malfunction indicator lamp ....482