key TOYOTA COROLLA HYBRID 2020 (in English) Repair Manual

536What to do if... (Troubleshooting)
COROLLA HV_U
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
 If you lose your mechanical
keys, new genuine mechani-
cal keys can be made by your
Toyota dealer. ( P.482)
 If you lose your electronic
keys, the risk of vehicle theft
increases significantly. Con-
tact your Toyota dealer imme-
diately. ( P.482)
 Is the electronic key battery
weak or depleted? ( P.431)
 Is the power switch in ON?
When locking the doors, turn the
power switch off. ( 
P. 1 4 5)
Is the electronic key left inside
the vehicle?
When locking the doors, make sure
that you have the electronic key on
your person.
 The function may not operate properly due to the condition
of the radio wave. (
P. 1 1 3 )
 Is the child-protector lock set?
The rear door cannot be opened
from inside the vehicle when the
lock is set. Open the rear door from
outside and then unlock the
child-protector lock. ( 
P. 1 0 8)
Did you press the power
switch while firmly depress-
ing the brake pedal?
( P.143)
 Is the shift lever in P?
( P.143)
 Is the electronic key any-
where detectable inside the
vehicle? ( P.112)
 Is the steering wheel
unlocked? ( P.144)
 Is the electronic key battery
weak or depleted?
In this case, the h ybrid system can
be started in a temporary way.
( 
P.484)
 Is the 12-volt battery dis-
charged? ( P.485)
If you have a problem,
check the following before
contacting your Toyota
dealer.
The doors cannot be
locked, unlocked, opened
or closed
You lose your keys
The doors cannot be
locked or unlocked
The rear door cannot be
opened
If you think something is
wrong
The hybrid system does
not start

5371-1. What to do if... (Troubleshooting)
COROLLA HV_U537What to do if... (Troubleshooting)
 Is the power switch in ON?
If you cannot release the shift lever
by depressing the brake pedal with
the power switch in ON. ( 
P.150)
It is locked automatically to
prevent theft of the vehicle.
( P.144)
 Is the window lock switch
pressed?
The power window except for the
one at the driver’s seat cannot be
operated if the win dow lock switch
is pressed. ( 
P.129)
The auto power off function
will be operated if the vehicle
is left in ACC or ON (the
hybrid system is not operat-
ing) for a period of time.
( P.146)
 The seat belt reminder light is flashing
Are the driver and the passenger
wearing the seat belts? (

P. 4 5 3)
The parking brake indicator is
on
Is the parking br ake released?
( 
P.153)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.450, 459)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the alarm
sounds. ( 
P. 7 7)
Do one of the following to deac-
tivate or stop the alarms:
Unlock the doors.
 Turn the power switch to ACC
or ON, or start the hybrid sys-
tem. (The alarm will be deacti-
vated or stopped after a few
seconds.)
 Is the electronic key left inside
the vehicle?
Check the message on the
multi-informat ion display. (
P.459)
The shift lever cannot be
shifted from P even if you
depress the brake pedal
The steering wheel can-
not be turned after the
hybrid system is stopped
The windows do not open
or close by operating the
power window switches
The power switch is
turned off automatically
A warning buzzer sounds
during driving
An alarm is activated and
the horn sounds
A warning buzzer sounds
when leaving the vehicle

5391-1. What to do if... (Troubleshooting)
COROLLA HV_U539Alphabetical Index
Alphabetical Index
A
A/C Air conditioning filter ............. 426
Automatic air conditioning sys-tem ..................................... 358
ABS (Anti-lock Brake System) ............................................... 220Warning light ........................ 452
ACA (Active Cornering Assist) ............................................... 221
Active Cornering Assist (ACA) ............................................... 221
Air conditioning filter ............. 426
Air conditioning system Air conditioning filter ............. 426
Automatic air conditioning sys-tem ..................................... 358
Airbags Airbag operating conditions.... 33
Airbag precautions for your child............................................. 36
Correct driving posture ........... 25
Curtain shield airbag operating conditions ............................. 34
Curtain shield airbag precautions ............................................. 36
Front passenger occupant clas- sification system ................... 40
General airbag precautions .... 36
Locations of airbags ............... 31
Modification and disposal of air- bags ..................................... 39
Side airbag operating conditions ............................................. 34
Side airbag precautions ......... 36
Side and curtain shield airbags operating conditions ............. 34
Side and curtain shield airbags precautions........................... 36
SRS airbags ........................... 31
SRS warning light................. 452 Alarm
Alarm ......................................77
Warning buzzer ....................450
AM ............................................279
Anchor brackets ... ..............49, 59
Antennas (smart key system) 111
Anti-lock Brake System (ABS) ...............................................220Warning light.........................452
Apple CarPlay .................264, 265
Approach warning ..................198
Apps button (Menu screen) ...235
Armrest ......... ......................... ..382
Assist grips .............................382
Audio .......................................274 Audio source ........................275
Operating information ...........296
Reordering the audio source 275
Screen adjustment ...............277
Some basics .........................275
Sound settings......................276
Turning the sys tem on and off
...........................................275
USB/AUX port ......................276
Voice command system .......278
AUDIO button ..........................233
Audio button (Menu screen) ..235
Audio settings.........................295 Common settings .................295
Radio settings.......................295
Audio source...........................275
Audio system-linked display ...93
Automatic air conditioning sys- tem .........................................358
Automatic High Beam ............160
Automatic light control system ...............................................159
AUX ..........................................291
Average fuel economy .............90
Average vehicle speed .............93

5411-1. What to do if... (Troubleshooting)
COROLLA HV_U541Alphabetical Index
Heated steering wheel and seat
heater precautions ............. 365
How your child should wear the seat belt................................ 28
Power window lock switch.... 129
Power window precautions .. 128
Rear door child-protectors.... 108
Removed electronic key battery precautions......................... 432
Seat belt extender precautions ............................................. 28
Seat belt precautions ............. 46
Trunk precautions................. 109
Child-protectors ..................... 108
Cleaning Aluminum wheels ................. 392
Exterior ................................. 392
Interior .................................. 394
Radar sensor........................ 169
Seat belts ............................. 394
Clock ........................... 84, 87, 269
Coat hooks .............................. 382
Command list ......................... 311
Condenser .............................. 409
Console box ............................ 371
Cooling system ...................... 408 Engine overheating .............. 489
Hybrid system overheating... 490
Cruise control Dynamic radar cruise control with full-speed range .......... 192
Cup holders ............................ 370
Current fuel consumption ....... 90
Curtain shield airbags ............. 31
Customizable features ........... 516
D
Daytime running light system158
DCM ................................. 349, 350
Defogger Outside rear view mirrors ..... 359
Rear window ........................ 359 Windshield ............................359
Dimensions .............................496
Dinghy towing .........................142
Display Dynamic radar cruise control with full-speed range ..........192
Energy monitor .......................95
LTA (Lane-Tracing Assist) .....187
Multi-information display.........89
Warning message.................459
Display change button .............86
Do-it-yourself maintenance ...398
Door lock Doors ....................................105
Smart key system ................. 111
Wireless remote control........103
Doors Automatic door locking and unlocking system ................108
Door glasses ........................127
Door lock ..............................105
Open door warning buzzer .106, 108
Outside rear view mirrors .....125
Rear door child-protectors ....108
Side doors ............................105
Drive distance ...........................93
Drive information ......................93
Drive-start control ..................133
Driving Break-in tips .........................133
Correct driving posture ...........25
Driving mode select switch ...219
Hybrid vehicle dri ving tips .....226
Procedures ...........................132
Winter drive tips....................228
Driving information display .....90
Driving range ............................90
Driving support system informa- tion display..............................93

542Alphabetical Index
COROLLA HV_U
Dynamic radar cruise control with full-speed range ........... 192Warning message ................ 201
E
ECB (Electronically Controlled Brake System) ...................... 220
ECO Accelerator Guidance ..... 91
Eco score .................................. 91
EDR (Event data recorder)......... 8
Elapsed time ............................. 93
Electric motor (traction motor)68
Electric Power Steering (EPS) ............................................... 221Warning light ........................ 453
Electronic key ......................... 102 Battery-saving fun ction......... 112
If the electronic key does not operate properly ................. 483
Replacing the battery ........... 431
Electronically Controlled Brake System (ECB) ....................... 220
Emergency flashers ............... 442
Emergency tire puncture repair kit ........................................... 462
Emergency, in case of If a warning buzzer sounds .. 450
If a warning light turns on ..... 450
If a warning message is dis-played................................. 459
If the 12-volt battery is dis- charged .............................. 485
If the electronic key does not operate properly ................. 483
If the fuel filler door cannot be opened ............................... 483
If the hybrid sy stem will not start
........................................... 481
If the vehicle is trapped in rising water .................................. 444
If you have a fla t tire ..... 462, 473
If you lose your keys ............ 482 If you think something is wrong
...........................................448
If your vehicle becomes stuck ...........................................492
If your vehicle has to be stopped in an emergency .................443
If your vehicle needs to be towed ...........................................445
If your vehicle ove rheats ......489
Energy monitor .........................95
Enform App Suite button (Setup screen) ...................................238
Engine ACCESSORY mode . ............145
Compartment........................406
Engine switch .......................143
Hood .....................................404
How to start the hybrid system ...........................................143
Identification number ............497
If the hybrid sys tem will not start
...........................................481
If your vehicle has to be stopped in an emergency .................443
Ignition switch (power switch) ...........................................143
Overheating ..........................489
Power switch ........................143
Tachometer.............................84
Engine coolant Capacity ...............................499
Checking ..............................408
Preparing and checking before winter ..................................228
Engine coolant temperature gauge .......................................84
Engine oil Capacity ...............................498
Checking ..............................406
Preparing and checking before winter ..................................228
Warning light.........................451

5451-1. What to do if... (Troubleshooting)
COROLLA HV_U545Alphabetical Index
J
Jack Positioning a floor jack ......... 405
Vehicle-equipped jack .. 464, 474
Jack handle ..................... 464, 474
Jam protection function Power windows .................... 127
K
Keyless entrySmart key system................. 111
Wireless remote control ....... 103
Keys Battery-saving fun ction......... 112
Electronic key ....................... 102
If the electronic key does not operate properly ................. 483
If you lose your keys ............ 482
Key number plate ................. 102
Keyless entry................ 105, 111
Mechanical key .................... 102
Power switch ........................ 143
Replacing the battery ........... 431
Warning buzzer .................... 112
Wireless remote control ....... 103
Knee airbags ............................. 31
L
Lane Tracing Assist (LTA) Operation ............................. 182
Warning messages............... 191
Language (multi-information dis- play) ......................................... 94
LATCH anchors ........................ 57
LED accent lights Light switch .......................... 158
Replacing light bulbs ............ 436
Lever Auxiliary catch lever ............. 404
Hood lock release lever........ 404 Internal trunk rele
ase lever ... 111
Shift lever .............................149
Turn signal lever ...................152
Wiper lever ...........................163
License plate lights Light switch...........................158
Replacing light bulbs ............436
Wattage ................................502
Light bulbs Replacing .............................435
Lights Automatic High Beam system...........................................160
Front interior lights................367
Headlight switch ...................158
Interior lights .........................367
Interior lights list ...................367
Personal lights ......................368
Rear interior lights ................367
Replacing light bulbs ............436
Trunk light ............................. 110
Turn signal lever ...................152
Vanity lights ..........................381
Wattage ................................502
Linking multi-information display and the system .....................247
Lock steering column ............144
LTA (Lane Tracing Assist) Operation..............................182
Warning messages ...............191
M
MaintenanceDo-it-yourself maintenance ..402
General maintenance ...........398
Maintenance data .................496
Maintenance requirements ...397
Malfunction indicator lamp ....451
Media button (Menu screen) ..235
Menu icons ................................89
Menu screen............................235 Menu screen operation.........235

5471-1. What to do if... (Troubleshooting)
COROLLA HV_U547Alphabetical Index
Phone ...................................... 317 About the contacts in the contact list ....................................... 321
Phone screen operation ....... 317
Registering/Conn ecting a Blue-
tooth
® phone ...................... 319
Some basics......................... 318
Troubleshooting.................... 341
Voice command system ....... 321
When selling or disposing of the vehicle ................................ 321
Phone button .......................... 317
Phone button (Menu screen) . 235
Phone button (Setup screen) 238
Phone settings ....................... 332 Contacts/Call history settings334
Message settings ................. 340
Notifications settings ............ 333
Sounds settings.................... 332
Placing a call u sing the Blue-
tooth
® hands-free system ... 322
By call history ....................... 322
By contacts list ..................... 323
By favorites list ..................... 322
By home screen ................... 324
By keypad ............................ 324
Power control unit .................... 71
Power control unit coolant Capacity ............................... 499
Checking .............................. 408
Preparing and c hecking before
winter.................................. 228
Power outlet ............................ 374
Power steering (Electric power steering system)................... 221Warning light ........................ 453
Power switch .......................... 143 Auto power off function ........ 146
Changing the power switch modes ................................ 145 Power switch (engine switch)
If your vehicle has to be stopped in an emergency .................443
POWER VOLUME knob ..........275
Power windows Door lock linked window opera-tion......................................128
Jam protection function ........127
Operation..............................127
Window lock switch ..............129
Pre-Collision System (PCS) Function................................174
Warning light.........................455
R
Radar cruise control (dynamic radar cruise control with
full-speed range)...................192
Radiator ...................................409
Radio........................................279 Presetting a station ...............279
Radio broadcast data system280
Rear seats ............................... 119 Head restraints .....................121
Rear side marker lights Light switch...........................158
Replacing light bulbs ....436, 437
Wattage ................................502
Rear turn signal lights Replacing light bulbs ............437
Turn signal lever ...................152
Wattage ................................502
Rear view mirror Inside rear view mirror ..........124
Outside rear view mirrors .....125
Rear view monitor system ..... 211 If you notice any symptoms ..216
Rear window defogger ...........359
Receiving a cal l using the Blue-
tooth
® hands-free system....325
Refueling Capacity ...............................497

548Alphabetical Index
COROLLA HV_U
Fuel types............................. 497
If the fuel filler door cannot be opened ............................... 483
Opening the fuel tank cap .... 165
Regenerative braking ............... 69
Registering/Connecting a Blue- tooth
® device ........................ 248
Profiles ................................. 251
Registering a Bluetooth
® audio
player for the first time........ 250
Registering a Bluetooth
® phone
for the first time .................. 248
Replacing Electronic key battery ........... 431
Fuses ................................... 433
Light bulbs ............................ 435
Tires ..................................... 473
Reporting safety defects for U.S. owners................................... 526
Resetting the message indicat- ing maintenance is required 398
Road Sign Assist .................... 202
RSA (Road Sign Assist) ......... 202
S
Safety Connect ......................... 62
Screen adjustment ................. 246
Seat belt reminder light . 453, 454
Seat belts .................................. 27 Adjusting the seat belt ............ 29
Automatic Locking Retractor .. 29
Child restraint system installation ............................................. 49
Cleaning and maintaining the seat belt.............................. 394
Emergency Locking Retractor 29
How to wear your seat belt..... 28
How your child should wear the seat belt................................ 28
Pregnant women, proper seat belt use................................. 27 Reminder light and buzzer .453,
454
Seat belt extender ..................28
Seat belt pretensioners ..........30
SRS warning light .................452
Seat heaters ............................365
Seating capacity .....................141
Seats Adjustment ........................... 118
Adjustment precautions ........ 118
Child seats/child restraint system installation ............................47
Cleaning ...............................394
Head restraints .....................121
Properly sitting in the seat ......25
Seat heaters ....... ..................365
Secondary Collision Brake ....221
Sensor Automatic headlight system .159
Automatic High Beam system...........................................160
BSM (Blind Sport Monitor) ....205
Inside rear view mirror ..........125
LTA (Lane Tracing Assist) .....182
Radar sensor ................168, 207
Service plug ..............................71
Service reminder message ....398
Setup button (Menu screen) 235, 238
Setup screen ...........................238
Shift lever Hybrid transmission ..............149
If th e s hif t le ver ca n no t b e s hif te d from P .................................150
Shift lock system ....................150
Side airbags ..............................31
Side marker lights Light switch...........................158
Replacing light bulbs ....436, 437
Wattage ................................502
Side mirrors Adjustment ...........................125

5491-1. What to do if... (Troubleshooting)
COROLLA HV_U549Alphabetical Index
BSM (Blind Sport Monitor) ... 205
Folding ................................. 126
Side turn signal lights Replacing light bulbs ............ 436
Turn signal lever ................... 152
Side windows ...... ................... 127
Smart key system Antenna location .................. 111
Entry functions ..................... 105
Starting the hybrid system.... 143
Snow tires ............................... 228
Spare tire ................................. 473 Inflation pressure.................. 501
Storage location ................... 474
Spark plug ............................... 499
Specifications ......................... 496
Speedometer ............................ 84
Status icon .............................. 236 Status icon explanation ........ 236
Steering lock Column lock release............. 144
Steering lock system warning message............................. 144
Steering switch ............... 293, 308 Audio switch ......................... 293
Talk switch ............................ 308
Steering wheel Adjustment ........................... 123
Heated steering wheel ......... 365
Meter control switches ........... 89
Stop lights Replacing light bulbs ............ 436
Storage features ..................... 369
Stuck If the vehicle becomes stuck 492
Sun visors ............................... 381
Switches Automatic High Beam system........................................... 160
Brake Hold switch ................ 156
Display change button............ 86
Door lock switches ............... 107 Driving mode select switch ...219
Dynamic radar cruise control
with full-speed range switch192
Emergency flashers switch...442
EV drive mode switch ...........147
Garage door opener switches ...........................................383
Heated steering wheel switch ...........................................365
Ignition switch .......................143
Instrument panel light control switches................................87
Light switches .......................158
LTA (Lane-Tracing Assist) switch ...........................................187
Meter control switches............89
Outside rear v iew mirror
switches..............................125
Parking brake switch ............153
Power door lock switch.........107
Power switch ........................143
Power window switches .......127
Rear window and outside rear view mirror defoggers switch...........................................358
Seat heater switches ............365
“SOS” button ..........................62
Vehicle-to-vehicle distance switch .................................192
VSC OFF switch ...................221
Window lock switch ..............129
Windshield wiper and washer switch .................................163
T
Tachometer ...............................84
Tail lights Light switch...........................158
Replacing light bulbs ............436
Talking on the Bluetooth
®
hands-free system ................326 Call screen operation ...........326

550Alphabetical Index
COROLLA HV_U
Incoming call waiting ............ 327
Sending tones ...................... 326
Transmit volume setting ....... 327
Theft deterrent system Alarm ...................................... 77
Immobilizer system ................ 75
Tire inflation pre ssure............ 422
Maintenance data................. 501
Warning light ........................ 454
Tire information ...................... 505 Glossary ............................... 509
Size ...................................... 507
Tire identification number ..... 507
Uniform Tire Quality Grading 508
Tire pressure warning system Function ............................... 415
Initializing ............................. 419
Installing tire pressure warning valves and transmitters ...... 418
Registering ID codes ............ 420
Warning light ........................ 454
Tires Chains .................................. 229
Checking .............................. 413
Emergency tire puncture repair kit........................................ 462
If you have a fla t tire ..... 462, 473
Inflation pressure.................. 422
Information ........................... 505
Replacing ............................. 473
Rotating tires ........................ 415
Size ...................................... 501
Snow tires ............................ 228
Spare tire.............................. 473
Tire pressure warning system ........................................... 415
Warning light ........................ 454
Tools ................................ 464, 474
Top tether strap ........................ 59
Total load capacity ................. 496
Touch screen .......................... 240 Touch screen gestures ......... 240 Touch screen operation ........240
To w i n g Dinghy towing .......................142
Emergency towing ................445
Towing eyelet........................447
Trailer towing ...... ..................141
Toyota Entune .........................345
Toyota Entune App Suite Entering keyword ..................353
Toyota Entune App Suite Con- nect ........................................351
Toyota Entune App Suite Con- nect settings .........................355
Toyota Safety Sense 2.0 Automatic High Be am ...........160
Dynamic radar cruise control with full-speed range ..........192
LTA (Lane Tracing Assist) .....182
PCS (Pre-Collisio n System) .174
RSA (Road Sign Assist) ........202
TRAC (Traction Control) ........221
Traction battery (hybrid battery) Hybrid battery (tr action battery)
air vents ................................73
Location ..................................71
Specification .........................497
Warning message...................74
Traction Control (TRAC) ........221
Traction motor (electric motor)68
Trailer towing ..........................141
Transmission Driving mode select switch ...219
Hybrid transmission ..............149
If th e s hif t le ver ca n no t b e s hif te d from P .................................150
Trip meters ................................86
Trunk ........................................109 Internal trunk rele ase lever ... 111
Smart key system ................. 110
Trunk light ............................. 110
Trunk opener ........................ 110
Wireless remote control........ 110