sensor TOYOTA 4RUNNER 2023 Workshop Manual

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

4837-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)
■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 7 )
■ 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.
■ 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.

4917-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)■
If “Auto power off to co nserve battery” is shown
Power was turned off due to the automatic power off function.
Next time when starting the engine, increase the engine speed s lightly and
maintain that level for approximately 5 minutes to recharge the battery.
■ When a message that indicates the need for the shift lever oper ation is
shown
To prevent the shift lever from being operated incorrectly or t he vehicle from
moving unexpectedly, a message that requires shifting the shift lever may be
shown on the multi-information display. In that case, follow th e instruction of
the message and shift the shift lever.
■ When “Headlight System Malfuncti on Visit Your Dealer” is displayed on
the multi-information display
The following system may be malfunctioning. Have the vehicle in spected by
your Toyota dealer.
● Automatic High Beam
■ If a message that indicates the malfunction of front camera is displayed
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 237, 488)
● PCS (Pre-Collision System)
● LDA (Lane Departure Alert)
● Dynamic radar cruise control
● Automatic High Beam
■ If a message that indicates the m alfunction of radar sensor is displayed
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 237, 488)
● PCS (Pre-Collision System)
● LDA (Lane Departure Alert)
● Dynamic radar cruise control
■ If a following message is shown, take appropriate action and co nfirm
that the message has disappeared.
*
● “Crawl Not Available Select L4 and Shift to [D] or [R] Position ”
● “Crawl Not Available Check System Operation Conditions”
*: Refer to the “Off-road Driving Owner’s Manual”.
■ If “Oil Maintenance Required Soon” is displayed (U.S.A. only)
Indicates that all maintenance according to the driven distance on the mainte-
nance schedule
* should be performed soon.
Comes on approximately 4500 miles (7200 km) after the message has been
reset.
If necessary, perform maintenance. Please reset the message aft er the main-
tenance is performed. ( P. 404)
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’ s Manual
Supplement” for the maintenance interval applicable to your veh icle.

5528-2. Customization
4RUNNER (U)■
Wireless remote control (P. 102, 106, 124)
■Driving position memory* (P. 142)
*: If equipped
■
Automatic light control system* (P. 212)
*: If equipped
FunctionDefault settingCustomized setting
Wireless remote control OnOff – – O
Panic functionOnOff – – O
Unlocking operation Driver’s door
unlocked in
one step, all
doors
unlocked in
two stepsAll doors
unlocked in
one step
–OO
123
FunctionDefault settingCustomized
setting
Selecting the door linking
driving position memory
with door unlock operation Driver’s door All doors – – O
123
FunctionDefault settingCustomized
setting
Time elapsed before head-
lights automatically turn off
after doors are closed 30 secondsOff
–OO
60 seconds
90 seconds
Light sensor sensitivity Level 3 Levels 1 to 5 – O O
123

5558-2. Customization
8
Vehicle specifications
4RUNNER (U)■
Meters (
P. 8 8 )
*: If equipped
■
Front automatic air conditioning system* ( P. 349)
*: If equipped
FunctionDefault settingCustomized
setting
Sensitivity of the ambient
light sensor used for dim-
ming the meter lights etc.
*
Standard -2 to 2 – – O
Sensitivity of the ambient
light sensor used for
brightening the meter
lights etc.
*
Standard -2 to 2 – – O
123
FunctionDefault settingCustomized setting
Switching between out-
side air and recirculated air
mode linked to automatic
mode button operation Auto Manual – O O
A/C automatic mode but-
ton operation Auto Manual – O O
123

5588-2. Customization
4RUNNER (U)■
BSM (Blind Spot Monitor) (P. 270)
■RCTA (Rear Cross Traffic Alert) (P. 286)
■Toyota parking assist-sensor* (P. 2 7 7 )
*: If equipped
■
Seat belt reminder ( P. 477)
FunctionDefault settingCustomized
setting
BSM OnOff O – –
Outside rear view mirror
indicator brightness BrightDim
O– –
Blank
Sensitivity IntermediateEarly
O– –
Late
Only when in blind spot
FunctionDefault settingCustomized setting
RCTA OnOff O – –
RCTA buzzer volume21 to 3 – – O
123
123
FunctionDefault settingCustomized
setting
Detection distance of the
rear center sensor Far Near – O O
Buzzer volume Level 2 Level 1 to 3 – O O
FunctionDefault settingCustomized setting
Vehicle speed linked seat
belt reminder buzzerOnOff – – O
123
123

580What to do if... (Troubleshooting)
4RUNNER (U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts?
(P. 480)
●The brake system warning light is on
Is the parking brake released? ( P. 2 1 1 )
●The open door warning indicator is on
Are all the doors closed? (P. 106, 124)
Depending on the situation, other types of warning buzzer may a lso sound.
( P. 477, 488)

●Did anyone inside the vehicle open a door during setting the al arm?
The sensor detects it and the alarm sounds. ( P. 79)
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine.
●Is the electronic key left inside the vehicle?
Check the message on the multi-information display.
●When a warning light turns on, refer to P. 477.
●When a warning light turns on or a warning message or indicator is dis-
played, refer to P. 477, 488.
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds w hen leaving the vehicle
A warning light turns on or a warning message is displayed

591Alphabetical index
4RUNNER (U)
Safety Connect .......................... 72
Seat belt reminder light........... 480
Seat belts.................................... 32Adjusting the seat belt ............ 32
Automatic Locking
Retractor (ALR) .................... 33
Child restra int system
installation ............................ 64
Cleaning and maintaining the seat belt ........................ 401
Emergency Locking Retractor (ELR) .................... 33
How to wear your seat belt ..... 32
How your child should wear
the seat belt .......................... 33
Pregnant women, proper
seat belt use ......................... 34
Reminder light and buzzer .... 480
Seat belt extender................... 33
Seat belt pretensioners ........... 33
SRS warning light ................. 478
Seat heaters ............................. 357
Seat position memory ............. 142
Seat ventilators ........................ 357
Seating capacity ...................... 181 Seats ................................. 129, 132
Adjustment.................... 129, 132
Adjustment
precautions................. 131, 141
Child seats/child restraint
system installation . ............... 59
Cleaning ............................... 400
Driving position memory ....... 142
Head restraints ..................... 146
Properly sitting in the seat ...... 30
Seat heaters ......................... 357
Seat position memory ........... 142
Seat ventilators ..................... 357
Sensor
Automatic headlight system .......... ...................... 215
Inside rear view mirror .......... 152
Intuitive parking assist .......... 277
Service reminder indicators ..... 82
Shift lever ................................. 205 Automatic transmission ........ 205
If the shift lever cannot be shifted from P .... 208
S
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

602
4RUNNER (U)
Milimeter wave radar sensor