2021 TOYOTA 4RUNNER battery

5137-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)
WARNING
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally ignit ing the flam-
mable gas that may be emitted from the battery:
● Make sure each jumper cable is connected to the correct terminal and that
it is not unintentionally in contact with any other than the in tended terminal.
● Do not allow the other end of the jumper cable connected to the “+” termi-
nal to come into contact with any other parts or metal surfaces in the area,
such as brackets or unpainted metal.
● Do not allow the + and - clamps of the jumper cables to come in to contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open fla me near
the battery.
■ Battery precautions
The battery contains poisonous and corrosive acidic electrolyte , while
related parts contain lead and lead compounds. Observe the foll owing pre-
cautions when handling the battery:
● When working with the battery, always wear safety glasses and t ake care
not to allow any battery fluids (acid) to come into contact wit h skin, clothing
or the vehicle body.
● Do not lean over the battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medica l attention
can be received.
● Always wash your hands after handling the battery support, term inals, and
other battery-related parts.
● Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not beco me entan-
gled in the cooling fans or engine drive belt.

5258-1. Specifications
8
Vehicle specifications
4RUNNER (U)
*: Voltage checked 20 minutes after the engine and all the lights are turned
off.
*: Your Toyota vehicle is filled with “Toyota Genuine Transfer Ge ar oil LF” at
the factory. Use Toyota approved “Toyota Genuine Transfer Gear oil LF” or
an equivalent of matching quality to satisfy the above specific ation. Please
contact your Toyota dealer for further details.
Electrical system
Battery
Open voltage* at
68 F (20 C):12.3 V or higher
If the voltage is lower than the standard
value, charge the battery.
Charging rates5 A max.
Transfer (4WD models)
Oil capacity
Part-time 4WD models
1.1 qt. (1.0 L, 0.9 Imp. qt.)
Full-time 4WD models
1.5 qt. (1.4 L, 1.2 Imp. qt.)
Oil type*Toyota Genuine Transfer gear oil LF or
equivalent
Recommended oil viscositySAE 75W

5408-1. Specifications
4RUNNER (U)
Production options
weight
The combined weight of installed regular pro-
duction options weighing over 5 lb. (2.3 kg) in
excess of the standard items which they
replace, not previously considered in curb
weight or accessory weight, including heavy
duty brakes, ride levelers, roof rack, heavy
duty battery, and special trim
Rim
A metal support for a tire or a tire and tube
assembly upon which the tire beads are
seated
Rim diameter
(Wheel diameter)Nominal diameter of the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation for a
rim by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity
weight (Total load
capacity)The rated cargo and l uggage load plus 150 lb.
(68 kg) times the vehicle’s designated seating
capacity
Vehicle maximum load
on the tire
The load on an individual tire that is deter-
mined by distributing to each axle its share of
the maximum loaded vehicle weight, and
dividing by two
Vehicle normal load on
the tire
The load on an individual tire that is deter-
mined by distributing to each axle its share of
curb weight, accessory weight, and normal
occupant weight (distributed in accordance
with Table 1
* below), and dividing by two
Weather sideThe surface area of the rim not covered by the
inflated tire
Bead
The part of the tire that is made of steel wires,
wrapped or reinforced by ply cords and that is
shaped to fit the rim
Bead separationA breakdown of the bond between compo-
nents in the bead
Tire related termMeaning

5578-2. Customization
8
Vehicle specifications
4RUNNER (U)
■In the following situations, customize mode will automatically be turned
off.
● A warning message appears after the customize mode screen is di splayed.
● The engine switch is turned to the “LOCK” position (without a s mart key sys-
tem) or the engine switch is turned to OFF (with a smart key sy stem).
● The vehicle begins to move while the customize mode screen is d isplayed.
WARNING
■During customization
As the engine needs to be running during customization, ensure that the
vehicle is parked in a place with adequate ventilation. In a closed area such
as a garage, exhaust gases including harmful carbon monoxide (CO) may
collect and enter the vehicle. This may lead to death or a seri ous health
hazard.
NOTICE
■ During customization
To prevent battery discharge, ensure that the engine is running while cus-
tomizing features.

558
4RUNNER (U)
8-3. Items to initialize
Items to initialize
The following item must be initialized for normal system opera-
tion after such cases as the battery being reconnected, or main -
tenance being performed on the vehicle:
ItemWhen to initializeReference
Message indicating mainte-
nance is requiredAfter the maintenance is per-
formedP. 399
Tire pressure warning sys-
tem
• When the tire inflation pres- sure is changed such as
when changing traveling
speed or load weight
• When the tire inflation pres-
sure is changed such as
when the tire size is
changed
• When rotating the tires
• After performing the trans- mitter ID code registration
procedure
P. 425

574
4RUNNER (U)
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. 105)
●If you lose your keys or electronic keys, the risk of vehicle t heft increases
significantly. Contact your Toyota dealer immediately. ( P. 109)
●Is the key battery weak or depleted? (P. 443)
●Vehicles with a smart key system:
Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 213)
●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 t he radio
wave. ( P. 122)
●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. 114)
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

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

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