2021 TOYOTA 4RUNNER ECU

4797-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)
*1: Parking brake engaged warning buzzer:A buzzer will sound if the vehicle is driven at a speed of appr oximately 3
mph (5 km/h) or more.
*2: Open door warning buzzer: The open door warning buzzer sounds to alert one or more of the doors is
not fully closed (with the vehicle having reached a speed of 3 mph [5 km/h]).
*3: Driver’s seat belt buzzer:
The driver's seat belt warning buzzer sounds to alert the drive r that his or
her seat belt is not fastened. Once the engine switch is turned to ON, the
buzzer sounds. If the seat belt is still unfastened, the buzzer sounds inter-
mittently for a certain period of time after the vehicle reache s a certain
speed.
Front passenger’s seat belt warning buzzer:
The front passenger’s seat belt warning buzzer sounds to alert the front
passenger that his or her seat belt is not fastened. If the sea t belt is unfas-
tened, the buzzer sounds intermittently for a certain period of time after the
vehicle reaches a certain speed.
*4: This light illuminates on the multi-information display.
■ SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (rear), safing
sensor (rear), driver's seat belt buckle switch, front passenger occupant clas-
sification system (ECU and sensors), “AIR BAG ON” and “AIR BAG OFF”
indicator lights, front passenger's seat belt buckle switch, se at belt preten-
sioners, airbags, interconnecting wiring and power sources. (P. 3 5 )
■ Key reminder buzzer (vehicles without a smart key system)
The buzzer indicates that the key has not been removed with the engine off
and the driver’s door opened.
■ Open moon roof reminder buzzer (if equipped)
The buzzer indicates that the moon roof is not fully closed with the engine off
and the driver’s door opened.
■ Front passenger detection senso r, passenger seat belt reminder and
warning buzzer
● If luggage is placed on the front passenger seat, the front pas senger detec-
tion sensor may cause the warning light to flash and the warnin g buzzer to
sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.

4807-2. Steps to take in an emergency
4RUNNER (U)■
If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
● Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after several trips, contact your Toyota dealer
as soon as possible.
■
When the tire pressure warning light comes on
Inspect the appearance of the ti re to check that the tire is not punctured.
If the tire is punctured: P. 489
If the tire is not punctured:
Carry out the following procedure after the tire temperature has lowered
sufficiently.
●Check the tire inflation pressure and adjust to the appropriate level.
●If the warning light does not go out even after several minutes , check
that the tire inflation pressure is at the specified level and carry out ini-
tialization. ( P. 4 2 4 )
The warning light may come on again if the above operations are con-
ducted without first allowing t he tire temperature to lower suf ficiently.
■The tire pressure warning light may come on due to natural caus es
The tire pressure warning light may come on due to natural caus es such
as natural air leaks and tire inflation pressure changes caused by tem-
perature. In this case, adjusting the tire inflation pressure w ill turn off the
warning light (afte r a few minutes).
■When a tire is replace d with a spare tire
Vehicles without P245/60R20 tires
The spare tire is not equipped with a tire pressure warning val ve and
transmitter. If a tire goes flat, the tire pressure warning lig ht will not turn off
even though the flat tire has been replaced with the spare tire . Replace
the spare tire with the repaired tire and adjust the tire infla tion pressure.
The tire press ure warning light will go off after a few minutes.
Vehicles with P245/60R20 tires
The spare tire is also equipped with a tire pressure warning va lve and
transmitter. The tire pressure warning light will turn on if the tire inflation
pressure of the spare tire is low. If a tire goes flat, the tire pressure warn-
ing light will not turn off even though the flat tire has been replaced with
the spare tire. Replace the spar e tire with the repaired tire and adjust the
tire inflation pressure. The t ire pressure warning light will go off after a few
minutes.

4917-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)
WARNING
■Using the tire jack
Improper use of the tire jack may cause the vehicle to suddenly fall off
the jack, leading to death or serious injury.
●Do not use the tire jack for any purpose other than replacing t ires or
installing and removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat
tire.
Do not use it on other vehicles, and do not use other tire jack s for
replacing tires on this vehicle.
●Always check that the tire jack is securely set to the jack poi nt.
●Do not put any part of your body under the vehicle while it is supported
by the jack.
●Do not start or run the engine while your vehicle is supported by the
jack.
●Do not raise the vehicle w hile someone is inside.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greater than that required to
replace the tire.
●Use a jack stand if it is nece ssary to get under the vehicle.
Vehicles with Automatic running boards
●Observe the following precautions. Failure to do so may result in seri-
ous injury:
• When jacking up the vehicle, always turn the Automatic running boards switch off.
• When jacking up the vehicle, do not use an Automatic running b oard
as a jack point. The Automatic running board may break, causing
injuries.
Take particular care when lowering the vehicle to ensure that n o one
working on or near the vehicle may be injured.
■Using the jack handle
Tighten all the jack handle bol ts securely using a Phillips-hea d screw-
driver, to prevent the extension parts from coming apart unexpe ctedly.

5017-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)
Lay down the tire with the outer
side facing up, and install the
holding bracket, inserting the
claw into the wheel lug nut hole.
Turn the jack handle extension
clockwise to take up slack in
the chain.
Then, check to ensure the claw
is in the wheel lug nut hole and
the holding bracket is centered
in the wheel hub.
Holding bracket
Claw
Vehicles wit hout kinetic
dynamic suspension: While
raising, secure the tire, taking
care that the tire goes straight
up without catching on any sur-
rounding part to prevent it from
flying forward during a collision
or sudden braking.
Vehicles with kinetic dynamic su spension: While raising, pull the
tire towards the rear of the vehi cle, taking care that the tire goes up
without catching on any surrounding part to prevent it from fly ing
forward during a collis ion or sudden braking.
Tightening torque:
34.4 ft•lbf (46.6 N•m, 4.8 kgf•m)
WARNING
■Stowing the flat tire
Failure to follow steps listed under stowing the tire may resul t in damage
to the spare tire carrier and lose of the tire, which could res ult in death or
serious injury.
Stowing the flat/spare tire, jack and tools
1
1
2

5027-2. Steps to take in an emergency
4RUNNER (U)
Confirm that the tire is not loose
after tightening:Push and pull the tire
Try rotating
Vishually check to ensure the tire
is not hung on su rrounding parts.
If looseness or misassembly
exists, repeat step and step
.
Repeat step any time the tire is lowered or disturbed.
Stow the tools and jack securely.
■After completing the tire change
The tire pressure warni ng system must be reset. ( P. 425)
■When using the spare tire (veh icles without P245/60R20 tires)
As the spare tire is not equipped with a tire pressure warning valve and
transmitter, low inflation pre ssure of the spare tire will not be indicated by
the tire pressure warning system. Also, if you replace the spar e tire after
the tire pressure wa rning light comes on, the light remains on.
2
1
2
1
2
32
4

5438-1. Specifications
8
Vehicle specifications
4RUNNER (U)
*:Table 1  Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Section width
The linear distance between the exteriors of
the sidewalls of an inflated tire, excluding ele-
vations due to labeling, decoration, or protec-
tive bands
SidewallThat portion of a tire between the tread and
bead
Sidewall separationThe parting of the rubber compound from the
cord material in the sidewall
Snow tire
A tire that attains a traction index equal to or
greater than 110, compared to the ASTM E-
1136 Standard Reference Test Tire, when
using the snow traction test as described in
ASTM F-1805-00, Standard Test Method for
Single Wheel Driving Traction in a Straight
Line on Snow-and Ice-Covered Surfaces, and
which is marked with an Alpine Symbol ( )
on at least one sidewall
Te s t r i m
The rim on which a tire is fitted for testing, and
may be any rim listed as appropriate for use
with that tire
TreadThat portion of a tire that comes into contact
with the road
Tread ribA tread section running circumferentially
around a tire
Tread separationPulling away of the tread from the tire carcass
Treadwear indicators
(TWI)The projections within the principal grooves
designed to give a visual indication of the
degrees of wear of the tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire
assembly securely during testing
Tire related termMeaning

5478-2. Customization
8
Vehicle specifications
4RUNNER (U)■
Smart key system* and wireless remote control
(
P. 110, 118, 131)
*: If equipped
■
Smart key system* (P. 110, 118, 131)
*: If equipped
FunctionDefault settingCustomized setting
Operation signal (buzzer) Level 5 Off
–OO
Level 1 to 7
Operation signal (Emer-
gency flashers) On Off – O O
Time elapsed before the
automatic door lock func-
tion is activated if a door is
not opened after being
unlocked 60 secondsOFF
–OO
30 seconds
120 seconds
Open door warning func-
tion (When locking the
vehicle) On Off – – O
123
FunctionDefault settingCustomized
setting
Smart door unlocking Driver’s door All the doors – O O
Smart key system On Off – – O
Number of consecutive
door lock operations 2 timesAs many
as desired ––O
123

561
9
For owners
4RUNNER (U)
●Déroulez la sangle diagonale
de telle sorte qu’elle passe bien
sur l’épaule, sans pour autant
être en contact avec le cou ou
glisser de l’épaule.
● Placez la sangle abdominale le
plus bas possible sur les
hanches.
● Réglez la position du dossier de s iège. Asseyez-vous le dos le plus
droit possible et calez-vous bien dans le siège.
● Ne vrillez pas la cei nture de sécurité.
■Ceintures de sécurité
Nettoyez avec un chiffon ou une éponge humectée d’eau savon-
neuse tiède. Vérifiez régulièrement que les ceintures ne sont p as
effilochées, entaillées ou exagérément usées.
Seat belt instructions for Canadian owners
(in French)
The following is a French explan ation of seat belt instructions
extracted from the seat bel t section in this manual.
See the seat belt section for mo re detailed seat belt instructions in
English.
Utilisation correcte d es ceintures de sécurité
Entretien et soin