sensor TOYOTA 4RUNNER 2022 Service Manual

2924-5. Using the driving support systems
4RUNNER (U)
■Intuitive parking assist can be operated when
●Front corner sensors:
• The engine switch is in the “ON” position (without a smart key system) or
the engine switch is in IGNITION ON mode (with a smart key syst em).
• The shift lever is in a position other than P.
• The vehicle speed is less than approximately 6 mph (10 km/h).
● Rear corner and rear center sensors:
• The engine switch is in the “ON” position (without a smart key system) or
the engine switch is in IGNITION ON mode (with a smart key syst em).
• The shift lever is in R.
■ Intuitive parking assist display
When an obstacle is detected while the Toyota parking assist mo nitor is in
use, the warning indicator will appear in the upper part of the screen even if
the display setting has been set to off.
■ Sensor detection information
●The sensor’s detection areas are limited to the areas around th e vehicle’s
front corner and rear bumpers.
● The following situations may occur during use.
• Depending on the shape of the obstacle and other factors, the detection
distance may shorten, or detection may be impossible.
• Obstacles may not be detected if they are too close to the sen sor.
• There will be a short delay between obstacle detection and dis play. Even
at slow speeds, there is a possibility that the obstacle will c ome within the
sensor’s detection areas before the display is shown and the wa rning
beep sounds.
• Thin posts or objects lower than the sensor may not be detected for colli-
sion when approached, even if they have been detected once.
• It might be difficult to hear beeps due to the volume of audio system or air
flow noise of air conditioning system.
■ Objects which the system may not be properly detected
●Wires, fences, ropes, etc.
● Cotton, snow and other materials that absorb sound waves
● Sharply-angled objects
● Low obstacles
● Tall obstacles with upper sections projecting outwards in the d irection of
your vehicle

2934-5. Using the driving support systems
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Driving
4RUNNER (U)■
Situations in which the syst em may not operate properly
Certain vehicle conditions and the surrounding environment may affect the
ability of a sensor to correctly detect objects. Particular instances where this
may occur are listed below.
● There is dirt, snow, water drops or ice on a sensor. (Cleaning the sensors
will resolve this problem.)
● A sensor is frozen. (Thawing t he area will resolve this problem .)
In especially cold weather, if a sensor is frozen the sensor di splay may be
displayed abnormally, or objects, such as a wall, may not be detected.
● On an extremely bumpy road, on an incline, on gravel, or on grass.
● 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
● A sensor is coated with a sheet of spray or heavy rain.
● If objects draw too close to the sensor.
● When a pedestrian is wearing clothing that does not reflect ult rasonic waves
(ex. skirts with gathers or frills).
● When objects that are not perpendicular to the ground, not perpendicular to
the vehicle traveling direction, uneven, or waving are in the d etection range.
● Strong wind is blowing
● When driving in inclement weather such as fog, snow or a sandst orm
● When an object that cannot be detected is between the vehicle a nd a
detected object
● If an object such as a vehicle, motorcycle, bicycle or pedestrian cuts in front
of the vehicle or runs out from the side of the vehicle
● If the orientation of a sensor has been changed due to a collis ion or other
impact
● 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
● If the front of the vehicle is raised or lowered due to the car ried load
● 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 a tire chains, compact spare tire or an emergency tire pun cture repair
kit is used
●
When a sensor or the area around a
sensor is extremely hot or cold.

2944-5. Using the driving support systems
4RUNNER (U)■
Situations in which the system may operate even if there is no possibil-
ity of a collision
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

2954-5. Using the driving support systems
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Driving
4RUNNER (U)●
When a tire chains, compact spare tire or an emergency tire pun cture repair
kit is used
■ When the system malfunctions
●If “Clean park sonar” is shown
A sensor may be dirty or covered with snow or ice. In such case s, if it is
removed from the sensor, the system should return to normal. Al so, due to
the sensor being frozen at low temperatures, a malfunction disp lay may
appear or an obstacle may not be detected. If the sensor thaws out, the sys-
tem should return to normal.
● If “Check park sonar system” is shown
Depending on the malfunction of the sensor, the device may not be working
normally. Have the vehicle inspected by your Toyota dealer.
■ Customization that can be configured at Toyota dealer
Some functions can be customized. (Customizable features P. 557)
■ Certification
For vehicles sold in the U.S.A.
This device complies with Part 15 of the FCC Rules. Operation i s subject to
the following two conditions; (1) This device may not cause har mful interfer-
ence, and (2) This device must accept any interference received, including
interference that may cause undesired operation.
For vehicles sold in Canada
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est conforme a la norme NMB-001 du Canada. ● On an extremely bumpy road, on an
incline, on gravel, or on grass

2964-5. Using the driving support systems
4RUNNER (U)
WARNING
■Cautions regarding the use of the system
There is a limit to the degree of recognition accuracy and cont rol perfor-
mance that this system can provide, do not overly rely on this system. The
driver is always responsible for paying attention to the vehicl e’ surroundings
and driving safely.
■ To ensure the system can operate properly
Observe the following precautions.
Failing to do so may result in the vehicle being unable to be driven safely
and possibly cause an accident.
● Do not damage the sensors, and always keep them clean.
● Do not attach a sticker or install an electronic component, such as a backlit
license plate (especially fluorescent type), fog lights, fender pole or wire-
less antenna near a radar sensor.
● Do not subject the surrounding area of the sensor to a strong impact. If
subjected to an impact, have the vehicle inspected by your Toyota dealer.
If the front or rear bumper needs to be removed/installed or replaced, con-
tact your Toyota dealer.
● Do not modify, disassemble or paint the sensors.
● Do not attach a license plate cover.
● Keep your tires properly inflated.
■ When to disable the function
In the following situations, disable the function as it may operate even
though there is no possibility of a collision.
● Failing to observe the warnings above.
● A non-genuine Toyota suspension (lowered suspension, etc.) is installed.
■ Notes when washing the vehicle
Do not apply intensive bursts of water or steam to the sensor a rea.
Doing so may result in the sensor malfunctioning.
● When using a high pressure washer to wash the vehicle, do not spray the
sensors directly, as doing so may cause a sensor to malfunction .
● When using steam to clean the vehicle, do not direct steam too close to
the sensors as doing so may cause a sensor to malfunction.

2974-5. Using the driving support systems
4
Driving
4RUNNER (U)
Multi-information display
Turning the RCTA function on/off.
Outside rear view mirror indica-
tors
When a vehicle approaching from
the right or left at the rear of the
vehicle is detected, both outside
rear view mirror indicators will
flash.
Navigation system screen
If a vehicle approaching from the
right or left at the rear of the vehicle
is detected, the RCTA icon (P.
299) for the detected side will be
displayed.
RCTA buzzer
If a vehicle approaching from the right or left at the rear of the vehicle is
detected, a buzzer will sound.
The RCTA function can be enabl ed/disabled on screen of the
multi-information display. ( P. 9 7 )
When the RCTA function is disabled, the “RCTA OFF” indicator wi ll come
on. Each time the engine switch is turned to the “LOCK” position (vehicles
without smart entry & start system) or off (vehicles with smart entry & start
system) then changed to the “ON” position (vehicles without sma rt entry &
start system) or IGNITION ON mode (vehicles with smart entry & start sys-
tem), the RCTA function will be enabled automatically.
RCTA (Rear Cross Traffic Alert)
: If equipped
The RCTA function uses the BSM radar sensors installed on the
inner side of the rear bumper. This function is intended to ass ist
the driver in checking areas that are not easily visible when
backing up.
System components
1
2
3
Turning the RCTA function on/off
4

2984-5. Using the driving support systems
4RUNNER (U)
■Outside rear view mirror indicator visibility
In strong sunlight, the outside rear view mirror indicator may be difficult to
see.
■ Hearing the RCTA buzzer
The RCTA buzzer may be difficult to hear over loud noises, such as if the
audio system volume is high.
■ When “RCTA Unavailable” is shown on the multi-information displ ay
Water, snow, mud, etc., may be attached to the rear bumper around the sen-
sors ( P. 283). Removing the water, snow, mud, etc., from the vicinity of the
sensor area should return it to normal. Also, the sensor may no t function nor-
mally when used in extremely hot or cold weather.
■ When “RCTA Malfunction Visit Your Dealer” is shown on the multi -infor-
mation display
There may be a sensor malfunction or misaligned. Have the vehicle
inspected by your Toyota dealer.
■ Radar sensors
P. 283
■ Customization
Some functions can be customized. ( P. 566)

2994-5. Using the driving support systems
4
Driving
4RUNNER (U)■
Operation of the RCTA function
The RCTA function uses radar
sensors to detect vehicles
approaching from the right or left at the rear of the vehicle a nd
alerts the driver of the presence of such vehicles by flashing the
outside rear view mirror indi cators and sounding a buzzer.
Approaching vehicles
Detection areas of approaching vehicles
■RCTA icon display
When a vehicle approaching
from the right or left at the rear
of the vehicle is detected, the
following will be displayed on
the navigation system screen.
Example: Vehicles are
approaching from both sides of
the vehicle.
RCTA function
1
2

3014-5. Using the driving support systems
4
Driving
4RUNNER (U)
■The RCTA function is operational when
The RCTA function operates when all of the following conditions are met:
● The engine switch is in the “ON” position (vehicles without sma rt entry &
start system) or IGNITION ON m ode (vehicles with smart entry & start sys-
tem).
● The RCTA function is on.
● The shift lever is in R.
● The vehicle speed is less than approximately 9 mph (15 km/h).
● The approaching vehicle speed is between approximately 5 mph (8 km/h)
and 35 mph (56 km/h).
■ Muting a buzzer temporarily
A mute button will be displayed on the multi-information displa y when a vehi-
cle or an object is detected. To mute the buzzer, press. The bu zzers for the
RCTA function and Toyota parking assist-sensor will be muted si multane-
ously.
Mute will be automatically canceled in the following situations :
● When the shift position is changed.
● When there is a malfunction in a sensor or the system is temporarily
unavailable.
● When the function is disabled while it is operating.
● The engine switch is in the “LOCK” position (vehicles without s mart entry &
start system) or turned off (vehicles with smart entry & start system).
■ Conditions under which the system will not detect a vehicle
The RCTA function is not designed to detect the following types of vehicles
and/or objects:
● Vehicles approaching from directly behind
● Vehicles backing up in a parking space next to your vehicle
● Guardrails, walls, signs, parked vehicles and similar stationar y objects
*
●Small motorcycles, bicycles, pedestrians, etc.*
●Vehicles moving away from your vehicle
● Vehicles approaching from the parking spaces next to your vehic le
*
●The distance between the sensor and approaching vehicle gets to o close
*: Depending on the conditions, detection of a vehicle and/or obj ect may
occur.
●
Vehicles that the sensors cannot detect
due to obstructions

3024-5. Using the driving support systems
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