2016 TOYOTA 4RUNNER key battery

4507-2. Steps to take in an emergency
4RUNNER (U)_(OM35B23U)
■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)

508
4RUNNER (U)_(OM35B23U)
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. 379)
●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

510What to do if... (Troubleshooting)
4RUNNER (U)_(OM35B23U)
●Is the shift lever in P? (P. 191)
●Is the steering wheel unlocked? (P. 191)
●Is the battery discharged? (P. 448)
●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. 447)
●Is the battery discharged? (P. 448)
●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. 444)
●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. 444)
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

515Alphabetical index
4RUNNER (U)_(OM35B23U)
Back door
Back door.............................. 114
Back window ......................... 148
Smart key system ................. 103
Wireless remote control .......... 96
Back window ............................ 148
Back-up lights
Replacing light bulbs............. 397
Wattage ................................ 469
Battery ...................................... 360
Battery checking ................... 360
If the vehicle battery
is discharged ...................... 448
Preparing and checking
before winter....................... 268
Warning light ......................... 413
Bottle holders .......................... 302
Brake
Fluid ...................................... 357
Parking brake........................ 203
Warning light ......................... 413
Brake assist ............................. 259
Break-in tips ............................. 159
Brightness control
Instrument panel light
control................................... 82Care .................................. 334, 337
Aluminum wheels ................. 334
Exterior ................................. 334
Interior .................................. 337
Seat belts.............................. 338
Cargo capacity......................... 173
Cargo hooks ............................ 303
Cargo net hooks ...................... 304
Center differential lock ........... 235
Chains ...................................... 270
Child restraint system............... 53
Booster seats, definition ......... 54
Booster seats, installation....... 65
Convertible seats, definition ... 54
Convertible seats,
installation ............................ 62
Front passenger occupant
classification system ............ 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
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM
OWNER’S MANUAL”.

516Alphabetical index
4RUNNER (U)_(OM35B23U)
Child safety ................................ 52
Airbag precautions .................. 37
Back door precautions .......... 116
Battery precautions ....... 361, 451
Child restraint system ............. 53
How your child should
wear the seat belt ................. 31
Installing child restraints ......... 57
Moon roof precautions .......... 155
Power window lock switch .... 145
Power window precautions ... 147
Rear door child-protectors ...... 99
Removed electronic
key battery precautions ...... 381
Seat belt extender
precautions ........................... 34
Seat belt precautions .............. 56
Seat heater precautions........ 291
Child-protectors......................... 99
Cleaning ........................... 334, 337
Aluminum wheels.................. 334
Exterior ................................. 334
Interior................................... 337
Seat belts .............................. 338
Clock ......................................... 309
Compass .................................... 85
Condenser ................................ 356
Console box ............................. 297
Cooling system
Engine overheating ............... 452
Crawl Control ........................... 249
Cruise control .......................... 221
Cup holders.............................. 298
Curtain shield airbags ............... 35
Customizable features ............ 485Daytime running light
system.................................... 208
Defogger
Front windshield ................... 286
Outside rear view
mirrors ........................ 280, 286
Rear window ................. 280, 286
Dimension ................................ 458
Dinghy towing.......................... 190
Display
Multi-information display ......... 81
Trip information....................... 83
Warning message................. 422
Do-it-yourself maintenance .... 346
Door courtesy lights
Wattage ................................ 469
Doors
Automatic door locking
and unlocking system......... 100
Back door ............................. 114
Door lock ........................ 98, 115
Door windows ....................... 145
Open door warning buzzer ... 105
Open door warning light ....... 415
Outside rear view mirrors ..... 143
Rear door child-protector ........ 99
Side doors .............................. 96
Downhill assist control
system.................................... 246
Driver’s seat position
memory .................................. 132
Driving ...................................... 158
Break-in tips.......................... 159
Correct driving posture ........... 28
Driving assist systems .......... 259
Off-road precautions ............. 272
Procedures ........................... 158
Winter drive tips .................... 268D

517Alphabetical index
4RUNNER (U)_(OM35B23U)
Eco Driving Indicator ................ 83
EDR (Event data recorder) ........ 10
Electronic key ............................ 90
Battery-saving function ......... 106
If the electronic key does not
operate properly ................. 446
Replacing the battery ............ 379
Emergency flashers ................ 402
Emergency, in case of
If the electronic key
does not operate
properly .............................. 446
If the engine will not start ...... 442
If the shift lever
cannot be shifted from P .... 444
If the vehicle battery is
discharged .......................... 448
If the warning buzzer
sounds ................................ 413
If the warning light turns
on ....................................... 413
If the warning message
is displayed......................... 422
If you cannot operate
back door opener ............... 445
If you have a flat tire ............. 429
If you think something
is wrong .............................. 411
If your vehicle becomes
stuck ................................... 455
If your vehicle has to be
stopped in an emergency ... 403
If your vehicle needs
to be towed ......................... 405
If your vehicle overheats ....... 452Engine
ACCESSORY mode ............. 195
Compartment ........................ 350
Engine switch ............... 191, 194
Hood ..................................... 349
How to start the
engine ........................ 191, 194
Identification number ............ 459
If the engine will not start ...... 442
Ignition switch
(engine switch) ........... 191, 194
Overheating .......................... 452
Engine coolant......................... 355
Capacity................................ 464
Checking............................... 355
Preparing and checking
before winter ...................... 268
Engine coolant temperature
gauge ....................................... 81
Engine immobilizer system ...... 70
Engine oil ................................. 352
Capacity................................ 461
Checking............................... 352
Preparing and checking
before winter ...................... 268
Engine switch .................. 191, 194
Event data recorder (EDR)........ 10
E

520Alphabetical index
4RUNNER (U)_(OM35B23U)
KDSS......................................... 260
Keyless entry ........................... 103
Smart key system ................. 103
Wireless remote control .......... 96
Keys ............................................ 90
Battery-saving function ......... 106
Electronic key ......................... 90
Engine switch................ 191, 194
If the electronic key
does not operate
properly .............................. 446
Key number plate.................... 90
Keyless entry .......................... 96
Mechanical key ....................... 92
Replacing the battery ............ 379
Warning buzzer..................... 105
Wireless remote control
key ........................................ 96
Knee airbags .............................. 35
LATCH anchors ......................... 59
Lever
Auxiliary catch lever .............. 349
Hood lock release lever ........ 349
Shift lever .............................. 199
Turn signal lever ................... 202
Wiper lever.................... 212, 215License plate lights ................. 204
Light switch ........................... 204
Replacing light bulbs ............ 398
Wattage ................................ 469
Light bulbs
Replacing.............................. 387
Wattage ................................ 469
Lights
Fog light switch ..................... 210
Front Interior light ................. 294
Headlight switch ................... 204
Interior lights list.................... 293
Luggage compartment
lights ................................... 116
Personal lights ...................... 294
Rear interior light .................. 294
Replacing light bulbs ............ 387
Turn signal lever ................... 202
Vanity lights .......................... 308
Wattage ................................ 469
Limited slip differential ........... 260
Load capacity .......................... 173
Lock steering
column ........................... 192, 196
Luggage compartment
features .................................. 303
K
L

522Alphabetical index
4RUNNER (U)_(OM35B23U)
Parking brake ........................... 203
Operation .............................. 203
Parking brake engaged
warning buzzer ................... 413
Parking lights ........................... 204
Light switch ........................... 204
Replacing light bulbs............. 390
Wattage ................................ 469
Pen holder ................................ 301
Personal lights ......................... 294
Power back window ................ 148
Jam protection function......... 150
Operation .............................. 148
Power outlets ................... 311, 316
Power steering
Fluid ...................................... 359
Warning light ......................... 415
Power windows........................ 145
Door lock linked
window operation ............... 146
Jam protection function......... 146
Operation .............................. 145
Window lock switch............... 145Radiator .................................... 356
Rear differential lock
system.................................... 243
Rear seats
Adjustment............................ 122
Folding down ........ 124, 126, 128
Rear step bumper .................... 115
Rear turn signal lights ............ 202
Replacing light bulbs ............ 396
Turn signal lever ................... 202
Wattage ................................ 469
Rear view mirror
Inside rear view mirror .......... 141
Outside rear view mirrors ..... 143
Rear view monitor system
*
Rear window ............................ 148
Rear window
defoggers....................... 280, 286
Rear window wiper .................. 215
Refueling .................................. 218
Capacity................................ 460
Fuel types ............................. 460
Opening the fuel tank cap..... 220
Replacing
Fuses .................................... 382
Key battery ........................... 379
Light bulbs ............................ 385
Tires...................................... 429
Reporting safety defects
for U.S. owners...................... 494
Resetting the message
indicating maintenance
is required.............................. 341
Roof luggage carrier ............... 168
PR