sensor TOYOTA 4RUNNER 2020 (in English) Service Manual

2914-5. Using the driving support systems
4
Driving
4RUNNER (U)●
The shape of the obstacle may prevent the sensor from detecting it. Pay
particular attention to the following obstacles:
• 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 direction of your vehicle
● 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.
■ 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. 547)
■ 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.

2924-5. Using the driving support systems
4RUNNER (U)
WARNING
■When using the intuitive parking assist
Observe the following precautions.
Failing to do so may result in the vehicle being unable to be d riven safely
and possibly cause an accident.
● Do not use the sensor at speeds in excess of 6 mph (10 km/h).
● The sensors’ detection areas and reaction times are limited. When moving
forward or reversing, check the areas surrounding the vehicle ( especially
the sides of the vehicle) for safety, and drive slowly, using t he brake to
control the vehicle’s speed.
● Do not install accessories within the sensors’ detection areas.
NOTICE
■When using intuitive parking assist-sensor
In the following situations, the system may not function correctly due to a
sensor malfunction etc. Have the vehicle checked by your Toyota dealer.
● The intuitive parking assist operation display flashes, and a beep sounds
when no obstacles are detected.
● If the area around a sensor collides with something, or is subjected to
strong impact.
● If the bumper collides with something.
● If the display shows continuously without a beep.
● If a display error occurs, first check the sensor.
If the error occurs even if there is no ice, snow or mud on the sensor, it is
likely that the sensor is malfunctioning.
■ 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.

4807-2. Steps to take in an emergency
4RUNNER (U)
Low fuel level warning lightIndicates remaining fuel is approximately 3.5 gal. (13.1
L, 2.9 Imp. gal.) or less
 Refuel the vehicle.
Seat belt reminder light (warning buzzer)*3
Warns the driver and/or front passenger to fasten their
seat belts
 Fasten the seat belt.
If the front passenger’s s eat is occupied, the front
passenger’s seat belt also needs to be fastened to
make the warning light (wa rning buzzer) turn off.
Brake Override System/Drive- Start Control warning
light (warning buzzer)
*4
When a buzzer sounds:
• Brake Override System is malfunctioning;
• Drive-Start Control is operating;
• Drive-Start Control is malfunctioning; or
 Follow the instructions displayed on the multi-
information display.
When a buzzer does not sound:
Brake Override System is operating
 Release the accelerator pedal and depress the
brake pedal.
(Flashes)
(U.S.A.)
(Flashes)
(Canada)Parking brake indicator (warning buzzer)*1
Indicates that the parking brake is engaged
 Release the parking brake.
(Flashes or
illuminates)
PCS warning light
Indicates a malfunction in the PCS (Pre-Collision Sys-
tem) or that the system is temporarily unavailable due
to the vehicle being extremely hot/cold, or dirt around
a front sensor, etc. ( P. 264, 487)
 Follow the instructions displayed on the multi-
information display. ( P. 264, 487)
If the PCS (Pre-Collision System) or VSC (Vehicle Sta-
bility Control) system is disabled, the PCS warning
light will illuminate.
 P. 264
Warning lightWarning light/Details/Actions

4827-2. Steps to take in an emergency
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.

5508-2. Customization
4RUNNER (U)■
Wireless remote control (P. 102, 110, 131)
■Driving position memory* (P. 149)
*: If equipped
■
Automatic light control system* (P. 225)
*: 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

5538-2. Customization
8
Vehicle specifications
4RUNNER (U)■
Meters (
P. 8 8 )
*: If equipped
■
Front automatic air conditioning system* ( P. 346)
*: 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

5568-2. Customization
4RUNNER (U)■
Toyota parking assist-sensor* (P. 2 8 6 )
*: If equipped
■
Seat belt reminder ( P. 477)
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

579What 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. 224)
●The open door warning indicator is on
Are all the doors closed? (P. 110, 131)
Depending on the situation, other types of warning buzzer may a lso sound.
( P. 477, 487)

●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 ( vehicles
with a smart key system) 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, 487.
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds w hen leaving the vehicle
(vehicles with a smart key system)
A warning light turns on or a warning message is displayed

591Alphabetical index
4RUNNER (U)
Safety Connect .......................... 70
Seat belt reminder light........... 480
Seat belts.................................... 30Adjusting the seat belt ............ 30
Automatic Locking
Retractor (ALR) .................... 31
Child restra int system
installation ............................ 62
Cleaning and maintaining the seat belt ........................ 394
Emergency Locking Retractor (ELR) .................... 31
How to wear your seat belt ..... 30
How your child should wear
the seat belt .......................... 31
Pregnant women, proper
seat belt use ......................... 32
Reminder light and buzzer .... 480
Seat belt extender................... 31
Seat belt pretensioners ........... 31
SRS warning light ................. 478
Seat heaters ............................. 353
Seat position memory ............. 149
Seat ventilators ........................ 353
Seating capacity ...................... 191 Seats ................................. 136, 139
Adjustment.................... 136, 139
Adjustment
precautions................. 138, 148
Child seats/child restraint
system installation . ............... 57
Cleaning ............................... 393
Driving position memory ....... 149
Head restraints ..................... 153
Properly sitting in the seat ...... 28
Seat heaters ......................... 353
Seat position memory ........... 149
Seat ventilators ..................... 353
Sensor
Automatic headlight system .......... ...................... 229
Inside rear view mirror .......... 159
Intuitive parking assist .......... 286
Service reminder indicators ..... 82
Shift lever ................................. 218 Automatic transmission ........ 218
If the shift lever cannot be shifted from P .... 221
S
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.