key TOYOTA 4RUNNER 2021 Owners Manual (in English)

575What to do if... (Troubleshooting)
4RUNNER (U)
●Is the shift lever in P? (P. 209)
●Is the steering wheel unlocked? ( P. 209)
●Is the battery discharged? (P. 510)
●Did you press the engine switch while firmly depressing the bra ke pedal?
( P. 212)
●Is the shift lever in P? ( P. 215)
●Is the electronic key anywhere detectable inside the vehicle? ( P. 119)
●Is the steering wheel unlocked? (P. 215)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. ( P. 508)
●Is the battery discharged? (P. 510)
●Vehicles without a smart key system:
Is the engine switch in the “ON” position?
If you cannot release the shift lever by depressing the brake p edal with the
engine switch in the “ON” position. ( P. 221)
●Vehicles with a smart key system:
Is the engine switch in IGNITION ON mode?
If you cannot release the shift lever by depressing the brake p edal with the
engine switch in IGNITION ON mode. ( P. 221)
If you think something is wrong
The engine does not start
(vehicles without a smart key system)
The engine does not start
(vehicles with a smart key system)
The shift lever cannot be shifted from P even if you depress
the brake pedal

576What to do if... (Troubleshooting)
4RUNNER (U)
●Vehicles without a smart key system:
It is locked to prevent theft of the vehicle if the key is pulled from the engine
switch. (P. 210)
●Vehicles with a smart key system:
It is locked automatically to prevent theft of the vehicle. ( P. 2 1 5 )
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat cannot be oper-
ated if the window lock switch is pressed. ( P. 162)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a peri od of
time. ( P. 214)
The steering wheel cannot be turned after the engine is
stopped
The windows do not open or close by operating the power
window switches
The engine switch is tur ned off automatically
(vehicles with a smart key system)

577What to do if... (Troubleshooting)
4RUNNER (U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts?
(P. 477)
●The brake system warning light is on
Is the parking brake released? ( P. 224)
●The open door warning indicator is on
Are all the doors closed? (P. 110, 131)
Depending on the situation, other types of warning buzzer may a lso sound.
( P. 474, 484)

●Did anyone inside the vehicle open a door during setting the al arm?
The sensor detects it and the alarm sounds. ( P. 79)
To stop the alarm, turn the engine switch to IGNITION ON mode ( vehicles
with a smart key system) or start the engine.
●Is the electronic key left inside the vehicle?
Check the message on the multi-information display.
●When a warning light turns on, refer to P. 474.
●When a warning light turns on or a warning message or indicator is dis-
played, refer to P. 474, 484.
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds w hen leaving the vehicle
(vehicles with a smart key system)
A warning light turns on or a warning message is displayed

579
4RUNNER (U)
Alphabetical index
Alphabetical index
A/C .................................... 340, 347Air conditioning filter ............. 441
ABS (Anti-lock Brake System)...... 320
Function ................................ 320
Warning light ......................... 475
Active head restraints ............. 137
Active traction control ............ 300
Air conditioning filter .............. 441
Air conditioning
system ............................ 340, 347 Air conditioning filter ............. 441
Airbags ....................................... 35
Airbag operating conditions .... 42
Airbag precautions for your child ......................... 37
Airbag warning light .............. 475
Correct driving posture ........... 28
Curtain shield airbag operating conditions ............. 42
Curtain shield airbag precautions ........................... 39
Front passenger occupant classification syst em............. 46
General airbag precautions .... 37
Locations of airbags................ 35
Modification and disposal of airbags.............................. 41
Side airbag operating
conditions ............................. 42
Side airbag precautions .......... 37
Side and curtain shield airbags operating conditions ............. 42
Side and curtain shield airbags precautions .............. 37
SRS airbags............................ 35 Alarm .......................................... 79
Alarm ...................................... 79
Warning buzzer .................... 474
Anchor brackets ........................ 57
Antennas (smart key system) ............... 118
Anti-lock Brake System (ABS) ...................................... 320
Function ................................ 320
Warning light......................... 475
Armrest..................................... 383
Assist grip ................................ 383
Audio system
*
AUTO LSD system................... 302
Automatic air conditioning
system.................................... 347
Automatic High Beam ............. 230
Automatic light control
system.................................... 225
Automatic running boards ..... 128
Automatic transmission ......... 218
If the shift lever cannot be shifted from P .... 221
S mode ................................. 219
AUX port
*
Auxiliary boxes ........................ 364
A
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

580Alphabetical index
4RUNNER (U)
Back doorBack door.............................. 131
Back window ......................... 166
Smart key system ................. 118
Wireless remote control ........ 110
Back window ............................ 166
Back-up lights Replacing light bulbs............. 457
Wattage ................................ 529
Battery ...................................... 417
Battery checking ................... 417
If the vehicle battery is discharged ...................... 510
Preparing and checking before winter....................... 329
Warning light ......................... 474
Bottle holders .......................... 366
Brake Fluid ...................................... 414
Parking brake........................ 224
Warning light ......................... 474
Brake assist ............................. 320
Brake override system ............ 177
Break-in tips ............................. 178
Brightness control Instrument panel light
control................................... 89 Care .................................. 392, 395
Exterior ................................. 392
Interior .................................. 395
Seat belts.............................. 396
Wheels and wheel ornaments .......................... 393
Cargo capacity......................... 191
Cargo hooks ............................ 367
Cargo net hooks ...................... 368
Center differential lock ........... 296
Chains ...................................... 331
Child restraint system............... 53 Booster seats, definition ......... 54
Booster seats, installation....... 65
Convertible seats, definition ... 54
Convertible seats,
installation ............................ 62
Front passenger occupant classification syst em ............ 46
Infant seats, definition............. 54
Infant seats, installation .......... 62
Installing CRS with LATCH anchors ............ 59
Installing CRS with seat belts...................................... 62
Installing CRS
with top tether strap.............. 66
BC

581Alphabetical index
4RUNNER (U)
Child safety ................................ 52Airbag precautions .................. 37
Back door precautions .......... 133
Battery precautions ....... 418, 513
Child restraint system ............. 53
How your child should
wear the seat belt ................. 31
Installing child restraints ......... 57
Moon roof precautions .......... 173
Power window lock switch .... 162
Power window precautions ... 165
Rear door child-protectors .... 114
Removed electronic key battery precautions ...... 445
Seat belt extender precautions ........................... 34
Seat belt precautions .............. 56
Seat heater precautions........ 355
Child-protectors....................... 114
Cleaning ........................... 392, 395 Exterior ................................. 392
Interior................................... 395
Seat belts .............................. 396
Wheels and wheel ornaments .......................... 393
Clock ......................................... 373
Compass .................................... 92
Condenser ................................ 414
Console box ............................. 361
Cooling system Engine overheating ............... 514
Crawl Control ........................... 310
Cruise control Dynamic radar cruise control................................. 272
Cup holders.............................. 362
Curtain shield airbags ............... 35
Customizable features ............ 545 Daytime running light
system.................................... 228
Defogger Front windshield ................... 349
Outside rear view
mirrors ........................ 342, 349
Rear window ................. 342, 349
Dimension ................................ 520
Dinghy towing.......................... 208
Display Dynamic radar cruise control ................................ 272
LDA
(Lane Departure Alert) ....... 264
Multi-information display ......... 90
Trip information....................... 90
Warning message................. 484
Do-it-yourself maintenance .... 404
Door courtesy lights Wattage ................................ 529
Doors Automatic door locking
and unlocking system......... 115
Back door ............................. 131
Door lock ...................... 113, 132
Door windows ....................... 162
Open door warning buzzer ... 120
Open door warning light ....... 476
Outside rear view mirrors ..... 160
Rear door child-protector ...... 114
Side doors ............................ 110
Downhill assist control
system.................................... 307
Drive-Start Control .................. 177
Driver’s seat position memory .................................. 149D

582Alphabetical index
4RUNNER (U)
Driving ...................................... 176Break-in tips .......................... 178
Correct driving posture ........... 28
Driving assist systems .......... 320
Off-road precautions ............. 333
Procedures ........................... 176
Winter drive tips .................... 329
Dynamic radar cruise
control .................................... 272
Eco Driving Indicator ................ 97
EDR (Event data recorder) ........ 10
Electronic key .......................... 102 Battery-saving function ......... 121
If the electronic key does not operate properly ................. 507
Replacing the battery ............ 443
Emergency, in case of
If the electronic key does not operate
properly .............................. 507
If the engine will not start ...... 504
If the vehicle battery is discharged .......................... 510
If the warning buzzer sounds ................................ 474
If the warning light turns on ....................................... 474
If a warning message is displayed......................... 484
If you cannot operate
back door opener ............... 506
If you have a flat tire ............. 489
If you think something is wrong .............................. 472
If your vehicle becomes stuck ................................... 517
If your vehicle has to be stopped in an emergency ... 463
If your vehicle needs
to be towed ......................... 466
If your vehicle overheats ....... 514 Emergency flashers ................ 462
Engine
ACCESSORY mode ............. 213
Compartment ........................ 408
Engine switch ............... 209, 212
Hood ..................................... 407
How to start the engine ........................ 209, 212
Identification number ............ 521
If the engine will not start ...... 504
Ignition switch (engine switch) ........... 209, 212
Overheating .......................... 514
Engine coolant......................... 412
Capacity................................ 524
Checking............................... 412
Preparing and checking before winter ...................... 329
Engine coolant temperature gauge ....................................... 88
Engine immobilizer system ...... 76
Engine oil ................................. 410 Capacity................................ 523
Checking............................... 410
Preparing and checking
before winter ...................... 329
Engine switch .................. 209, 212
Event data recorder (EDR)........ 10
Flat tire ..................................... 489
Floor mats .................................. 26
Fluid
Automatic transmission ........ 527
Brake .................................... 527
Power steering...................... 528
Washer ................................. 420
Fog lights ................................. 234
Replacing light bulbs ............ 449
Switch ................................... 234
Wattage ................................ 529
Four-wheel drive system............................ 292, 296
E
F

584Alphabetical index
4RUNNER (U)
I/M test ...................................... 403
IdentificationEngine................................... 521
Vehicle .................................. 521
Ignition switch (engine switch) .............. 209, 212
Illuminated entry system ........ 359
Immobilizer system ................... 76
Indicators ................................... 85
Initialization
Maintenance ......................... 399
Moon roof.............................. 172
Power back window .............. 168
Power windows ..................... 164
Inside rear view mirror ............ 158
Instrument panel light control ...................................... 89
Interior lights............................ 357
Intuitive parking assist............ 285 Jack
Vehicle-equipped jack .......... 489
Jack handle .............................. 493
Jam protection function Moon roof ............................. 171
Power back window .............. 168
Power windows..................... 163
KDSS ........................................ 321
Keyless entry ........................... 118 Smart key system ................. 118
Wireless remote control ........ 110
Keys .......................................... 102 Battery-saving function ......... 121
Electronic key ....................... 102
Engine switch ............... 209, 212
If the electronic key
does not operate
properly .............................. 507
Key number plate ................. 102
Keyless entry ........................ 110
Mechanical key ..................... 104
Replacing the battery............ 443
Warning buzzer .................... 120
Wireless remote control
key...................................... 110
Knee airbags .............................. 35
IJ
K

587Alphabetical index
4RUNNER (U)
Radiator .................................... 414
Rear differential lock system .................................... 304
Rear seats
Adjustment ............................ 139
Folding down ........ 141, 143, 145
Rear step bumper .................... 132
Rear turn signal lights............. 223
Replacing light bulbs............. 456
Turn signal lever ................... 223
Wattage ................................ 529
Rear view mirror Inside rear view mirror .......... 158
Outside rear view mirrors...... 160
Rear view monitor system
*
Rear window ............................ 166
Rear window defoggers ....................... 342, 349
Rear window wiper .................. 239
Refueling .................................. 242
Capacity ................................ 522
Fuel types ............................. 522
Opening the fuel tank cap ..... 244
Replacing Fuses .................................... 446
Key battery............................ 443
Light bulbs ............................ 449
Tires ...................................... 489
Reporting safety defects
for U.S. owners ...................... 560
Resetting the message indicating maintenance
is required .............................. 399
Roof luggage carrier ............... 186 Safety Connect .......................... 70
Seat belt reminder light .......... 477
Seat belts ................................... 30
Adjusting the seat belt ............ 30
Automatic Locking
Retractor (ALR) .................... 31
Child restra int system
installation ............................ 62
Cleaning and maintaining the seat belt........................ 396
Emergency Locking Retractor (ELR) .................... 31
How to wear your seat belt ..... 30
How your child should wear
the seat belt.......................... 31
Pregnant women, proper
seat belt use ......................... 32
Reminder light and buzzer.... 477
Seat belt extender .................. 31
Seat belt pretensioners........... 31
SRS warning light ................. 475
Seat heaters ............................. 355
Seat position memory ............. 149
Seat ventilators........................ 355
Seating capacity ...................... 191
RS
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

588Alphabetical index
4RUNNER (U)
Seats ................................. 136, 139Adjustment .................... 136, 139
Adjustment
precautions ................. 138, 148
Child seats/child restraint
system installation . ............... 57
Cleaning................................ 395
Driving position memory ....... 149
Head restraints ..................... 153
Properly sitting in the seat ...... 28
Seat heaters ......................... 355
Seat position memory ........... 149
Seat ventilators ..................... 355
Sensor
Automatic headlight system ......... ....................... 228
Inside rear view mirror .......... 159
Intuitive parking assist .......... 285
Service reminder indicators ..... 82
Shift lever ................................. 218 Automatic transmission......... 218
If the shift lever cannot be shifted from P .... 221 Shift lock system ..................... 220
Side airbags ............................... 35
Side marker lights ................... 225
Light switch ........................... 225
Replacing light bulbs ............ 454
Wattage ................................ 529
Side mirrors ............................. 160 Adjusting and folding ............ 160
Side turn signal lights ............. 223
Slide deck................................. 370
Smart key system .................... 118 Antenna location ................... 118
Entry functions ...................... 110
Starting the engine ............... 212
Snow tires ................................ 332
Spare tire .................................. 489 Inflation pressure .................. 528
Storage location.................... 490
Spark plug ................................ 524
Specifications .......................... 520
Speedometer.............................. 88
Steering lock ............................ 215 Column lock release ............. 215
Steering lock system
warning message ............... 215
Steering wheel ......................... 156 Adjustment............................ 156
Storage feature ........................ 360
Storage precautions................ 189
Stuck If the vehicle becomes stuck ................................... 517
Sun visors ................................ 372