
504
4RUNNER (U)_(OM35B18U)
What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
●If you lose your keys or mechanical keys, new genuine mechanical keys
can be made by your Toyota dealer. (P. 93)
●If you lose your keys or electronic keys, the risk of vehicle theft increases
significantly. Contact your Toyota dealer immediately. ( P. 95)
●Is the key battery weak or depleted? (P. 377)
●Vehicles with a smart key system:
Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 195)
●Vehicles with a smart key system:
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. 106)
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

506What to do if... (Troubleshooting)
4RUNNER (U)_(OM35B18U)
●Is the shift lever in P? (P. 191)
●Is the steering wheel unlocked? ( P. 191)
●Is the battery discharged? (P. 447)
●Did you press the engine switch while firmly depressing the brake pedal?
(P. 194)
●Is the shift lever in P? ( P. 196)
●Is the electronic key anywhere detectable inside the vehicle? ( P. 104)
●Is the steering wheel unlocked? ( P. 197)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. ( P. 446)
●Is the battery discharged? (P. 447)
●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 pedal with the
engine switch in the “ON” position. ( P. 443)
●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 pedal with the
engine switch in IGNITION ON mode. ( P. 443)
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

507What to do if... (Troubleshooting)
4RUNNER (U)_(OM35B18U)
●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. 192)
●Vehicles with a smart key system:
It is locked automatically to prevent theft of the vehicle. ( P. 197)
●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. 145)
●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 period of
time. ( P. 196)
The steering wheel cannot be turned after the engine is
stopped
The windows do not open or cl ose by operating the power
window switches
The engine switch is tu rned off automatically
(vehicles with a smart key system)

508What to do if... (Troubleshooting)
4RUNNER (U)_(OM35B18U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts?
( P. 415)
●
The brake system warning light is on
Is the parking brake released? ( P. 203)
●
The open door warning indicator is on
Are all the doors closed? ( P. 96, 114)
Depending on the situation, other types of warning buzzer may also
sound. ( P. 412,
421)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 72)
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. 412.
●When a warning light turns on or a warning message or indicator is dis-
played, refer to P. 412, 421.
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
(vehicles with a smart key system)
A warning light turns on or a warning message is dis-
played

513Alphabetical index
4RUNNER (U)_(OM35B18U)
Eco Driving Indicator ................ 83
EDR (Event data recorder) ........ 10
Electronic key ............................ 90Battery-saving function ......... 106
If the electronic key does not
operate properly ................. 445
Replacing the battery ............ 377
Emergency, in case of If the electronic key does not operate
properly .............................. 445
If the engine will not start ...... 441
If the shift lever cannot be shifted from P .... 443
If the vehicle battery is discharged .......................... 447
If the warning buzzer sounds ................................ 412
If the warning light turns
on ....................................... 412
If the warning message is displayed......................... 421
If you cannot operate back door opener ............... 444
If you have a flat tire ............. 428
If you think something is wrong .............................. 410
If your vehicle becomes stuck ................................... 453
If your vehicle has to be stopped in an emergency ... 401
If your vehicle needs
to be towed ......................... 403
If your vehicle overheats ....... 450 Emergency flashers ................ 400
Engine
ACCESSORY mode ............. 195
Compartment ........................ 349
Engine switch ............... 191, 194
Hood ..................................... 348
How to start the engine ........................ 191, 194
Identification number ............ 457
If the engine will not start ...... 441
Ignition switch (engine switch) ........... 191, 194
Overheating .......................... 450
Engine coolant......................... 354
Capacity................................ 460
Checking............................... 354
Preparing and checking before winter ...................... 268
Engine coolant temperature gauge ....................................... 81
Engine immobilizer system ...... 70
Engine oil ................................. 351 Capacity................................ 459
Checking............................... 351
Preparing and checking
before winter ...................... 268
Engine switch .................. 191, 194
Event data recorder (EDR)........ 10
E

515Alphabetical index
4RUNNER (U)_(OM35B18U)
Head restraints ........................ 136
Headlights ................................ 204Light switch ........................... 204
Replacing light bulbs ................... 385, 387, 397
Wattage ................................ 465
Heaters
Air conditioning system ....... ................. 278, 284
Outside rear view
mirrors ....................... 280, 286
Seat heaters ......................... 291
Hill-start assist control............ 260
Horn .......................................... 139
Hood ......................................... 348
Hooks
Cargo hooks ......................... 303
Cargo net hooks ................... 304
Grocery bag hooks ............... 306
Retaining hooks (floor mat)..... 26 I/M test ...................................... 344
Identification
Engine .................................. 457
Vehicle .................................. 457
Ignition switch (engine switch) .............. 191, 194
Illuminated entry system ........ 295
Immobilizer system ................... 70
Indicators ................................... 79
Initialization
Maintenance ......................... 340
Moon roof ............................. 154
Power back window .............. 150
Power windows..................... 146
Inside rear view mirror ............ 141
Instrument panel light control ...................................... 82
Interior lights ........................... 293
Intuitive parking assist ........... 225
Jack Vehicle-equipped jack .......... 428
Jack handle .............................. 432
Jam protection function
Moon roof ............................. 153
Power back window .............. 150
Power windows..................... 146
HI
J

520Alphabetical index
4RUNNER (U)_(OM35B18U)
Side mirrors ............................. 143Adjusting and folding ............ 143
Side turn signal lights ............. 202
Smart key system .................... 103 Antenna location ................... 103
Entry functions ........................ 96
Starting the engine................ 194
Snow tires ................................ 271
Slide deck ................................. 306
Spare tire .................................. 428 Inflation pressure .................. 464
Storage location .................... 429
Spark plug ................................ 460
Specifications .......................... 456
Speedometer .............................. 81
Steering lock ............................ 196 Column lock release ............. 197
Steering lock system
warning message ............... 427
Steering wheel ......................... 139
Adjustment ............................ 139
Storage feature ........................ 296
Storage precautions ................ 171 Stuck
If the vehicle becomes
stuck ................................... 453
Sun visors ................................ 308
Switches Cruise control switch ............ 221
“DISP” button .......................... 84
Door lock switches.................. 98
Driving position memory switches ............................. 132
Emergency flashers switch ... 400
Engine switch ............... 191, 194
Fog light switch ..................... 210
Garage door opener
switches ............................. 320
Ignition switch ............... 191, 194
Light switches ....................... 204
Moon roof switches............... 152
Outside rear view mirror switches ............................. 143
Power back window switch ................................. 148
Power door lock switch ........... 98
Power window switches........ 145
Rear window wiper and
washer switch..................... 215