tow TOYOTA 4RUNNER 2023 Service Manual

2834-5. Using the driving support systems
4
Driving
4RUNNER (U)■
Situations in which the system may operate even if there is no possibil-
ity of a collision
In some situations, such as the following, the system may opera te even
though there is no possibility of a collision.
● When driving toward a banner, flag, low-hanging branch or boom barrier
(such as those used at railroad crossings, toll gates and parking lots)
● When there is a rut or hole in the surface of the road
● When driving on a metal cover (grating), such as those used for drainage
ditches
● When driving up or down a steep slope
● If a sensor is hit by a large amount of water, such as when dri ving on a
flooded road
● There is dirt, snow, water drops or ice on a sensor. (Cleaning the sensors
will resolve this problem.)
● A sensor is coated with a sheet of spray or heavy rain
● When driving in inclement weather such as fog, snow or a sandst orm
● When vehicle horns, vehicle detectors, motorcycle engines, air brakes of
large vehicles, the clearance sonar of other vehicles or other devices which
produce ultrasonic waves are near the vehicle
● If the front of the vehicle is raised or lowered due to the car ried load
● If the orientation of a sensor has been changed due to a collis ion or other
impact
● The vehicle is approaching a tall or curved curb
● Driving close to columns (H-shaped steel beams, etc.) in multi- story parking
garages, construction sites, etc.
● If the vehicle cannot be driven in a stable manner, such as whe n the vehicle
has been in an accident or is malfunctioning
●
When driving on a narrow road
● When strong winds are blowing

2914-5. Using the driving support systems
4
Driving
4RUNNER (U)■
Situations in which the syst em may not operate properly
The RCTA function may not detect vehicles correctly in the foll owing situa-
tions:
● When the sensor is misaligned due to a strong impact to the sensor or its
surrounding area
● When mud, snow, ice, a sticker, etc., is covering the sensor or surrounding
area on the rear bumper
● When driving on a road surface that is wet with standing water during bad
weather, such as heavy rain, snow, or fog
● When multiple vehicles are approaching with only a small gap be tween
each vehicle
● When a vehicle is approaching at high speed
● When equipment that may obstruct a sensor is installed, such as a towing
eyelet, bumper protector (an additional trim strip, etc.), bicy cle carrier, or
snow plow
● When towing a trailer
● When there is a significant difference in height between your vehicle and the
vehicle that enters the detection area
● When a sensor or the area around a sensor is extremely hot or c old
● If the suspension has been modified or tires of a size other th an specified
are installed
● If the front of the vehicle is raised or lowered due to the car ried load
●
When backing up on a slope with a
sharp change in grade
● When backing out of a sharp angle park-
ing spot

2924-5. Using the driving support systems
4RUNNER (U)■
Situations in which the system may operate even if there is no possibil-
ity of a collision
Instances of the RCTA function unnecessarily detecting a vehicl e and/or
object may increase in the following situations:
● When equipment that may obstruct a sensor is installed, such as a towing
eyelet, bumper protector (an additional trim strip, etc.), bicy cle carrier, or
snow plow
●
When turning while backing up
● When a vehicle turns into the detection
area
● When the parking space faces a street
and vehicles are being driven on the
street
● When the distance between your vehicle
and metal objects, such as a guardrail,
wall, sign, or parked vehicle, which may
reflect electrical waves toward the rear
of the vehicle, is short

2934-5. Using the driving support systems
4
Driving
4RUNNER (U)●
When there are spinning objects near your vehicle such as the f an of an air
conditioning unit
● When water is splashed or sprayed toward the rear bumper, such as from a
sprinkler
● Moving objects (flags, exhaust fumes, large rain droplets or snowflakes, rain
water on the road surface, etc.)
● When the distance between your vehicle and a guardrail, wall, etc., that
enters the detection area is short
● Gratings and gutters
● When a sensor or the area around a sensor is extremely hot or c old
● If the suspension has been modified or tires of a size other th an specified
are installed
● If the front of the vehicle is raised or lowered due to the car ried load
●
When a vehicle passes by the side of
your vehicle
● When a detected vehicle turns while
approaching the vehicle

3304-5. Using the driving support systems
4RUNNER (U)
WARNING
■When the TRAC/VSC/Trailer Sway Control is activated
The slip indicator light flashes. Always drive carefully.
Reckless driving may cause an accident. Exercise particular car e when the
indicator light flashes.
■ When TRAC/VSC/Trailer Sway Control systems are turned off
Be especially careful and drive at a speed appropriate to the r oad condi-
tions. As these are systems to help ensure vehicle stability and driving
force, do not turn the TRAC/VSC/Trailer Sway Control systems off unless
necessary.
■ Replacing tires
Make sure that all tires are of the specified size, brand, trea d pattern and
total load capacity. In addition, make sure that the tires are inflated to the
recommended tire inflation pressure level.
The ABS, Multi Terrain ABS, TRAC, VSC and Trailer Sway Control will not
function correctly if different tires are installed on the vehi cle.
Contact your Toyota dealer for further information when replaci ng tires or
wheels.
■ Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspensio n will affect
the driving assist systems, and may cause a system to malfunction.
■ Trailer Sway Control precaution
The Trailer Sway Control system is not able to reduce trailer sway in all situ-
ations.
Depending on many factors such as the conditions of the vehicle, trailer,
road surface and driving environment, the Trailer Sway Control system may
not be effective. Refer to your trailer owner’s manual for info rmation on how
to tow your trailer properly.
■ If trailer sway occurs
Observe the following precautions.
Failing to do so may cause death or serious injury.
● Firmly grip the steering wheel. Steer straight ahead.
Do not try to control trailer sway by turning the steering whee l.
● Begin releasing the accelerator pedal immediately but very grad ually to
reduce speed.
Do not increase speed. Do not apply vehicle brakes.
If you make no extreme correction with the steering or brakes, your vehicle
and trailer should stabilize. ( P. 195)

3665-3. Using the storage features
4RUNNER (U)
■Adjusting the size of the cup holders
Front seats
Rear seats (without third row seats)
Remove the adapter.
Remove the adapter.
WARNING
■
Items unsuitable f or the cup holders
Do not place anything other than cups or aluminum cans in the c up holders.
Even with the lid is closed, items must not be stored in the cup holders.
Other items may be thrown out of the holders in the event of an accident or
sudden braking, causing injury. If possible, cover hot drinks t o prevent
burns.
■ When not in use (second row seat cup holders only)
Keep the cup holders closed. In the event of sudden braking, an accident
may occur due to an occupant being struck by the open cup holde rs or the
items stored inside.
NOTICE
■ To prevent damage to the rear cup holders (second row seats only)
Stow the cup holders before stowing the armrest.

3695-3. Using the storage features
5
Interior features
4RUNNER (U)
■When using the bottle holder
●When storing a bottle, close the cap.
● The bottle may not be stored depending on its size or shape.
Bottle holders
Front seatsRear seats (without third row
seats)/second row seats (with
third row seats)
WARNING
■Items unsuitable for the bottle holder
Do not place anything other than a bottle in the bottle holders .
Other items may be thrown out of the holders in the event of an accident or
sudden braking and cause injury.
NOTICE
■ Items that should not be stowed in the bottle holders
Put the cap on before stowing a bottle. Do not place open bottles in the bot-
tle holders, or glasses and paper cups containing liquid. The contents may
spill and glasses may break.

3745-3. Using the storage features
4RUNNER (U)
WARNING
■When the cargo hooks are not in use
To avoid injury, always return the cargo hooks to their stowed positions.
■ Slide deck operating precaution (if equipped)
● Be careful not to get hands or feet pinched by the slide deck.
● Be careful not to allow the slide deck to hit any persons or lu ggage while
sliding the deck.
● Do not operate the slide deck while someone is on it.
Doing so may cause an accident.
● If operating the slide deck when the vehicle is stopped on an incline, the
slide deck may move faster. Be careful not to allow the slide d eck to hit
you or pinch your fingers etc.
● After sliding the deck, make sure it is securely locked in posi tion.
● Do not close the back door while any person is sitting on the s lide deck or
any person is between the slide deck and back door.
● Do not stow any objects into the space between the slide deck rails.
NOTICE
■To prevent damage to the cargo net hooks
Avoid hanging things other than a cargo net on them.
■ Slide deck weight capacity (if equipped)
Do not load anything heavier than 440 lb. (200 kg) on the slidi ng deck.
■ Grocery bag hook weight capacity
Do not hang any object heavier than 8.8 lb. (4 kg) on the groce ry bag hooks.
■ When using the slide deck (if equipped)
● Do not close the back door while the slide deck is sliding out. Doing so
may cause the back door or slide deck to break.
● If operating the slide deck when the vehicle is stopped on an incline, the
slide deck may move faster. Be careful as luggage may become damaged
or fly out and damage the cabin.

409
6
Maintenance and care
4RUNNER (U)
6-3. Do-it-yourself maintenance
Do-it-yourself ser vice precautions
If you perform maintenance by yourself, be sure to follow the
correct procedure as given in these sections.
ItemsParts and tools
Battery condition (P. 422)
• Warm water• Baking soda
•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(P. 419)
• FMVSS No.116 DOT 3 or SAE J1703 brake
fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant level (P. 417)
• “Toyota Super Long Life Coolant” or a similar
high quality ethylene glycol-based non-silicate,
non-amine, non-nitrite and non-borate coolant
with long-life hybrid organic acid technology
For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed
with 50% coolant and 50% deionized water.
For Canada:
“Toyota Super Long Life Coolant” is pre-mixed
with 55% coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level (P. 415)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)

4106-3. Do-it-yourself maintenance
4RUNNER (U)
Fuses (P. 450)• Fuse with same amperage rating as original
Light bulbs (P. 453)
• Bulb with same number and wattage rating as
original
• Phillips-head screwdriver
• Flathead screwdriver• Wrench
Power steering fluid
level ( P. 421)• Automatic transmission fluid DEXRON® II or III
• Rag or paper towel• Clean funnel
Radiator and con-
denser (P. 419)
Tire inflation pressure
( P. 4 4 0 )• Tire pressure gauge
• Compressed air source
Washer fluid
(P. 425)
• Water or washer fluid containing antifreeze (for
winter use)
• Funnel (used only for adding water or washerfluid)
ItemsParts and tools