2017 TOYOTA 4RUNNER key battery

4557-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)_(OM35B37U)
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■ To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
● Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.
■ Charging the battery
The electricity stored in the battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the battery may
discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)
■ When recharging or replacing the battery
●Vehicles with a smart key system: In some cases, it may not be possible to
unlock the doors using the smart key system when the battery is dis-
charged. Use the wireless remote control or the mechanical key to lock or
unlock the doors.
● The engine may not start on the first attempt after the battery has recharged
but will start normally after the second attempt. This is not a malfunction.
● Vehicles with a smart key system: The engine switch mode is memorized by
the vehicle. When the battery is reconnected, the system will return to the
mode it was in before the battery was discharged. Before disconnecting the
battery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery dis-
charged, be especially careful when reconnecting the battery.
● Make sure that the key is not inside the vehicle when recharging or replac-
ing the battery. The key may be locked in the vehicle if the alarm is acti-
vated. ( →P. 73)

512
4RUNNER (U)_(OM35B37U)
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. 96)
●Is the key battery weak or depleted? ( →P. 383)
●Vehicles with a smart key system:
Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( →P. 197)
●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. 107)
●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. 100)
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

513What to do if... (Troubleshooting)
4RUNNER (U)_(OM35B37U)
●Is the shift lever in P? (→P. 193)
●Is the steering wheel unlocked? ( →P. 193)
●Is the battery discharged? (→P. 453)
●Did you press the engine switch while firmly depressing the brake pedal?
(→P. 196)
●Is the shift lever in P? ( →P. 198)
●Is the electronic key anywhere detectable inside the vehicle? ( →P. 105)
●Is the steering wheel unlocked? (→P. 199)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (→P. 452)
●Is the battery discharged? (→P. 453)
●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. 204)
●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. 204)
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

517
4RUNNER (U)_(OM35B37U)
Alphabetical index
Alphabetical index
A/C .................................... 282, 288Air conditioning filter ............. 381
ABS (Anti-lock Brake System)...... 263
Function ................................ 263
Warning light ......................... 418
Active head restraints ............. 121
Active traction control ............ 243
Air conditioning filter .............. 381
Air conditioning
system ............................ 282, 288 Air conditioning filter ............. 381
Airbags ....................................... 35
Airbag operating conditions .... 42
Airbag precautions for your child ......................... 37
Airbag warning light .............. 418
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 .......................................... 72 Alarm ...................................... 72
Warning buzzer..................... 417 Anchor brackets ........................ 57
Antennas
(smart key system) ............... 104
Anti-lock Brake System (ABS) ...................................... 263
Function ................................ 263
Warning light......................... 418
Armrest..................................... 322
Assist grip ................................ 323
Audio system
*
AUTO LSD system................... 245
Automatic air conditioning
system.................................... 288
Automatic light control
system.................................... 208
Automatic running boards ..... 112
Automatic transmission ......... 201 If the shift lever cannot be shifted from P .... 204
S mode ................................. 202
AUX port
*
Auxiliary boxes ........................ 304
Back door Back door ............................. 115
Back window......................... 150
Smart key system ................. 104
Wireless remote control .......... 97
Back window............................ 150
Back-up lights Replacing light bulbs ............ 401
Wattage ................................ 473
Battery ...................................... 364 Battery checking ................... 364
If the vehicle battery
is discharged ...................... 453
Preparing and checking
before winter ...................... 272
Warning light......................... 417
A
B
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

518Alphabetical index
4RUNNER (U)_(OM35B37U)
Bottle holders .......................... 306
BrakeFluid ...................................... 361
Parking brake........................ 207
Warning light ......................... 417
Brake assist ............................. 263
Break-in tips ............................. 161
Brightness control Instrument panel light control................................... 82
Care................................... 338, 341 Aluminum wheels.................. 338
Exterior ................................. 338
Interior................................... 341
Seat belts .............................. 342
Cargo capacity ......................... 175
Cargo hooks............................. 307
Cargo net hooks ...................... 308
Center differential lock............ 239
Chains....................................... 274
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 Child safety ................................ 52
Airbag precautions.................. 37
Back door precautions .......... 117
Battery precautions....... 365, 456
Child restraint system ............. 53
How your child should
wear the seat belt ................. 31
Installing child restraints ......... 57
Moon roof precautions .......... 157
Power window lock switch .... 146
Power window precautions ... 149
Rear door child-protectors .... 100
Removed electronic key battery precautions ...... 385
Seat belt extender precautions........................... 34
Seat belt precautions .............. 56
Seat heater precautions ....... 295
Child-protectors ...................... 100
Cleaning ........................... 338, 341 Aluminum wheels ................. 338
Exterior ................................. 338
Interior .................................. 341
Seat belts.............................. 342
Clock......................................... 313
Compass .................................... 85
Condenser................................ 360
Console box ............................. 301
Cooling system Engine overheating............... 457
Crawl Control ........................... 253
Cruise control .......................... 225
Cup holders ............................. 302
Curtain shield airbags............... 35
Customizable features ............ 489
C

519Alphabetical index
4RUNNER (U)_(OM35B37U)
Daytime running light system .................................... 212
Defogger Front windshield.................... 290
Outside rear view
mirrors ........................ 284, 290
Rear window ................. 284, 290
Dimension ................................ 462
Dinghy towing .......................... 192
Display Multi-information display ......... 81
Trip information ....................... 83
Warning message ................. 426
Do-it-yourself maintenance .... 350
Door courtesy lights Wattage ................................ 473
Doors Automatic door locking and unlocking system ......... 101
Back door.............................. 115
Door lock......................... 99, 116
Door windows ....................... 146
Open door warning buzzer ... 106
Open door warning light........ 419
Outside rear view mirrors...... 144
Rear door child-protector ...... 100
Side doors............................... 97
Downhill assist control system .................................... 250
Driver’s seat position memory .................................. 133
Driving ...................................... 160
Break-in tips .......................... 161
Correct driving posture ........... 28
Driving assist systems .......... 263
Off-road precautions ............. 276
Procedures ........................... 160
Winter drive tips .................... 272 Eco Driving Indicator ................ 83
EDR (Event data recorder)........ 10
Electronic key ............................ 90
Battery-saving function ......... 107
If the electronic key does not
operate properly ................. 451
Replacing the battery............ 383
Emergency flashers ................ 406
Emergency, in case of If the electronic key
does not operate
properly .............................. 451
If the engine will not start ...... 448
If the vehicle battery is
discharged.......................... 453
If the warning buzzer
sounds................................ 417
If the warning light turns on ....................................... 417
If the warning message is displayed ........................ 426
If you cannot operate
back door opener ............... 450
If you have a flat tire ............. 433
If you think something is wrong .............................. 415
If your vehicle becomes stuck ................................... 460
If your vehicle has to be
stopped in an emergency ... 407
If your vehicle needs to be towed......................... 409
If your vehicle overheats....... 457
DE

521Alphabetical index
4RUNNER (U)_(OM35B37U)
Head restraints ........................ 137
Headlights ................................ 208Light switch ........................... 208
Replacing light bulbs ................... 391, 393, 403
Wattage ................................ 473
Heaters
Air conditioning system ....... ................. 282, 288
Outside rear view
mirrors ....................... 284, 290
Seat heaters ......................... 295
Hill-start assist control............ 264
Hood ......................................... 353
Hooks Cargo hooks ......................... 307
Cargo net hooks ................... 308
Grocery bag hooks ............... 310
Retaining hooks (floor mat)..... 26
Horn .......................................... 140
I/M test ...................................... 349
Identification Engine................................... 463
Vehicle .................................. 463
Ignition switch (engine switch) .............. 193, 196
Illuminated entry system ........ 299
Immobilizer system ................... 70
Indicators ................................... 79
Initialization Maintenance ......................... 345
Moon roof.............................. 156
Power back window .............. 152
Power windows ..................... 148
Inside rear view mirror ............ 142
Instrument panel light
control ...................................... 82
Interior lights............................ 297
Intuitive parking assist............ 229 Jack
Vehicle-equipped jack .......... 433
Jack handle .............................. 437
Jam protection function Moon roof ............................. 155
Power back window .............. 152
Power windows..................... 147
KDSS ........................................ 264
Keyless entry ........................... 104 Smart key system ................. 104
Wireless remote control .......... 97
Keys ............................................ 90 Battery-saving function ......... 107
Electronic key ......................... 90
Engine switch ............... 193, 196
If the electronic key
does not operate
properly .............................. 451
Key number plate ................... 90
Keyless entry .......................... 97
Mechanical key ....................... 92
Replacing the battery............ 383
Warning buzzer .................... 106
Wireless remote control
key........................................ 97
Knee airbags .............................. 35
LATCH anchors ......................... 59
Lever Auxiliary catch lever.............. 353
Hood lock release lever ........ 353
Shift lever.............................. 201
Turn signal lever ................... 206
Wiper lever ................... 216, 219
H
I
J
K
L

523Alphabetical index
4RUNNER (U)_(OM35B37U)
Outer foot lights....................... 297
Outside rear view mirrors ....... 144Adjusting and folding ............ 144
Outside rear view mirror defoggers ......... 284, 290
Outside temperature display .................................... 314
Overhead console ................... 304
Overheating, Engine................ 457
Parking brake ........................... 207 Operation .............................. 207
Parking brake engaged
warning buzzer ................... 417
Parking lights ........................... 208
Light switch ........................... 208
Replacing light bulbs............. 394
Wattage ................................ 473
Pen holder ................................ 305
Personal lights ......................... 298
Power back window ................ 150 Jam protection function......... 152
Operation .............................. 150
Power outlets ................... 315, 320
Power steering
Fluid ...................................... 363
Warning light ......................... 419
Power windows........................ 146
Door lock linked window operation ............... 148
Jam protection function......... 147
Operation .............................. 146
Window lock switch............... 146 Radiator .................................... 360
Rear differential lock
system.................................... 247
Rear seats
Adjustment............................ 123
Folding down ........ 125, 127, 129
Rear step bumper .................... 116
Rear turn signal lights ............ 206
Replacing light bulbs ............ 400
Turn signal lever ................... 206
Wattage ................................ 473
Rear view mirror Inside rear view mirror .......... 142
Outside rear view mirrors ..... 144
Rear view monitor system
*
Rear window ............................ 150
Rear window defoggers....................... 284, 290
Rear window wiper .................. 219
Refueling .................................. 222
Capacity................................ 464
Fuel types ............................. 464
Opening the fuel tank cap..... 224
Replacing Fuses .................................... 386
Key battery ........................... 383
Light bulbs ............................ 389
Tires...................................... 433
Reporting safety defects
for U.S. owners...................... 498
Resetting the message indicating maintenance
is required.............................. 345
Roof luggage carrier ............... 170
P
R
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.