2012 TOYOTA 4RUNNER sensor

122 1-7. Safety information
4RUNNER_U
SRS airbag system componentsSide airbags
“AIR BAG ON” and “AIR BAG
OFF” indicator lights
Curtain shield airbags
Front passenger airbag
Knee airbags
Side and curtain shield airbag
sensors
Front airbag sensors
Airbag sensor assembly
Front passenger’s seat belt
buckle switch Occupant detection system
(ECU and sensors)
Curtain shield airbag sensors
SRS warning light and
“RSCA OFF” indicator light
Roll sensing of curtain shield
airbags off switch
Floor sensor
Driver airbag
Driver’s seat belt buckle
switch
CTH17AS100

123
1-7. Safety information
1
Before driving
4RUNNER_U
Your vehicle is equipped with
ADVANCED AIRBAGS designed based
on the US motor vehicle safety standards (FMVSS208). The airbag
system controls airbag deployment power for the driver and front pas-
senger. The driver airbag system co nsists of the driver’s seat belt
buckle switch etc. The front pass enger’s airbag system consists of
the front passenger occupant classification sensor etc.
The main SRS airbag system components are shown above. The
SRS airbag system is controlled by the airbag sensor assembly. The
airbag sensor assembly consists of a safing sensor and an airbag
sensor.
In certain types of severe frontal or side impacts, the SRS airbag sys-
tem triggers the airbag inflators. A chemical reaction in the inflators
quickly fills the airbags with non-toxic gas to help rest rain the motion
of the occupants.
■ If the SRS airbags deploy (inflate)
● Bruising and slight abrasions may result from contact with a deploying
(inflating) SRS airbag.
● A loud noise and white powder will be emitted.
● Parts of the airbag module (steering wheel hub, airbag cover and inflator)
as well as the front seats, parts of the front and rear pillars, and roof side
rails, may be hot for several minutes. The airbag itself may also be hot.
● The windshield may crack.
● For Safety Connect subscribers, if the SRS airbags deploy or in the event
of a severe rear-end collision, the system is designed to send an emer-
gency call to the response center, notifying them of the vehicle’s location
(without needing to push the “SOS” button) and an agent will attempt to
speak with the occupants to ascertain the level of emergency and assis-
tance required. If the occupants are unable to communicate, the agent
automatically treats the call as an emergency and helps to dispatch the
necessary emergency services. ( P. 493)

207
2-3. Operating the lights and wipers
2
When driving
4RUNNER_U
Turning on the high beam headlights
With the headlights on, push
the lever away from you to
turn on the high beams.
Pull the lever toward you to the
center position to turn the high
beams off.
Pull the lever toward you and
release it to flash the high
beams once.
You can flash the high beams
with the headlights on or off.
CTH23AS040
■Daytime running light system
● To make your vehicle more visible to other drivers, the daytime running
lights turn on automatically whenever the engine is started and the park-
ing brake is released. Daytime running lights are not designed for use at
night.
Type A and B: Daytime running lights can be turned off by operating the
switch.
● Compared to turning on the headlights, the daytime running light system
offers greater durability and consumes less electricity, so it can help
improve fuel economy.
■ Headlight control sensor (if equipped)
The sensor may not function properly if
an object is placed on the sensor, or any-
thing that blocks the sensor is affixed to
the windshield.
Doing so interferes with the sensor
detecting the level of ambient light and
may cause the automatic headlight sys-
tem to malfunction.
CTH23AS012

208 2-3. Operating the lights and wipers
4RUNNER_U
■Automatic light off system
Vehicles without a smart key system
● When the headlights come on: The headlights and tail lights turn off 30
seconds after a door is opened and closed if the engine switch is turned
to the “ACC” or “LOCK” position. (The lights turn off immediately if
on the key is pressed after all the doors are locked.)
● When only the tail lights come on: The tail lights turn off automatically if
the engine switch is turned to the “ACC” or “LOCK” position and the
driver’s door is opened.
To turn the lights on again, turn the engine switch to the “ON” position, or
turn the lights off and then back to or .
Vehicles with a smart key system
● When the headlights come on: The headlights and tail lights turn off 30
seconds after a door is opened and closed if the “ENGINE START
STOP” switch is turned to ACCESSORY mode or turned off. (The lights
turn off immediately if on the key is pressed after all the doors are
locked.)
● When only the tail lights come on: The tail lights turn off automatically if
the “ENGINE START STOP” switch is turned off and the driver’s door is
opened.
To turn the lights on again, turn the “ENGINE START STOP” switch to IGNI-
TION ON mode, or turn the light switch off and then back to or
.
■ Customization that can be co nfigured at Toyota dealer
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features P. 660)
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not run-
ning.

221
2-4. Using other driving systems
2
When driving
4RUNNER_U
Intuitive parking assist
The distance from your vehicle to nearby obstacles when parallel
parking or maneuvering into a garage is measured by the sensors
and communicated via an indicator and a buzzer. Always check the
surrounding area when using this system.
■Types of sensors
Rear corner sensors
Rear center sensors
■ Intuitive parking assist switch
Turns the intuitive parking
assist on/off
When on, the indicator light
comes on and the buzzer
sounds to inform the driver
that the system is operational.
CTH24AS008
: If equipped

222 2-4. Using other driving systems
4RUNNER_U
The indicator and buzzerWhen a sensor detects an obstacle, the direction of the obstacle is
indicated and the buzzer sounds.
■ Sensor operation and distance to an obstacle
The system operates when the vehicle approaches an obstacle, as
shown by the following table.
Rear corner sensors
Rear center sensors
Distance to an obstacle ft. (cm)Indicator and buzzer
Approximately 1.6 - 1.2 (50 - 37.5) Intermittent
Approximately 1.2 - 0.8 (37.5 - 25) Fast intermittent
Approximately 0.8 or less (25 or less) Continuously
Distance to an obstacle ft. (cm)Indicator and buzzer
Approximately 4.9 - 2.0 (150 - 60) Intermittent
Approximately 2.0 - 1.5 (60 - 45) Fast intermittent
Approximately 1.5 - 1.2 (45 - 35) Very fast intermittent
Approximately 1.2 or less (35 or less) Continuously

223
2-4. Using other
driving systems
2
When driving
4RUNNER_U
Detection range of the sensors
Approximately 1.6 ft. (50 cm)
Approximately 4.9 ft. (150 cm)
The diagram shows the detection
range of the sensors. Note that
the sensors cannot detect obsta-
cles that are extremely close to
the vehicle.
The range of the sensors may
change depending on the shape
of the object etc.
CTH24AS081
■Intuitive parking assist can be operated when
Vehicles without a smart key system: The engine switch is in the “ON” posi-
tion and the shift lever is in R.
Vehicles with a smart key system: The “ENGINE START STOP” switch is in
IGNITION ON mode and the shift lever is in R.

224 2-4. Using other driving systems
4RUNNER_U
■Sensor detection information
● Certain vehicle conditions and the surrounding environment may affect
the ability of a sensor to correctly detect an obstacle. Particular instances
where this may occur are listed below.
• There is dirt, snow or ice on a sensor.
• A sensor is frozen.
• A sensor is covered in any way.
• The vehicle is leaning considerably to one side.
• On an extremely bumpy road, on an incline, on gravel, or on grass
• The vicinity of the vehicle is noisy due to vehicle horns, motorcycle
engines, air brakes of large vehicles, or other loud noises producing
ultrasonic waves.
• There is another vehicle equipped with parking assist sensors in the vicinity.
• A sensor is coated with a sheet of spray or heavy rain.
• A bumper or sensor receives a strong impact.
• The vehicle is approaching a tall or right-angled curb.
• In harsh sunlight or intense cold weather
• A non-genuine Toyota suspension (lowered suspension etc.) is installed.
In addition to the examples above, there are instances in which, because of
their shape, signs and other objects may be judged by a sensor to be closer
than they are.
● The shape of the obstacle may prevent a 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