Toyota Sienna (2019 year). Instruction — part 21
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4-5. Using the driving support systems
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WARNING
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Sensors
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.
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There is dirt, snow or ice on the sensor. (Wiping the sensors will resolve
this problem.)
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The sensor is frozen. (Thawing the area will resolve this problem.)
In especially cold weather, if a sensor is frozen the screen may show an
abnormal display, or obstacles may not be detected.
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The sensor is covered in any way.
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The vehicle is leaning considerably to one side.
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On an extremely bumpy road, on an incline, on gravel, or on grass.
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The vicinity of the vehicle is noisy due to vehicle horns, motorcycle
engines, air brakes of large vehicles, or other loud noises producing ultra-
sonic waves.
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There is another vehicle equipped with parking assist sensors in the vicin-
ity.
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The sensor is coated with a sheet of spray or heavy rain.
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The sensor is drenched with water on a flooded road.
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The vehicle is equipped with a fender pole or wireless antenna.
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Towing eyelets are installed.
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The bumper or sensor receives a strong impact.
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The vehicle is approaching a tall or curved curb.
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The detection range is reduced due to an object such as a sign.
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In harsh sunlight or intense cold weather.
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The area directly under the bumpers is not detected.
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If obstacles draw too close to the sensor.
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A non-genuine Toyota suspension (lowered suspension, etc.) is installed.
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A backlit license plate 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.
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4-5. Using the driving support systems
WARNING
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Obstacles which may not be properly detected
The shape of the obstacle may prevent a sensor from detecting it. Pay par-
ticular attention to the following obstacles:
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Wires, fences, ropes, etc.
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Cotton, snow and other materials that absorb sound waves
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Sharply-angled objects
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Low obstacles
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Tall obstacles with upper sections projecting outwards in the direction of
your vehicle
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People may not be detected if they are wearing certain types of clothing.
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Moving objects such as people or animals
NOTICE
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When using intuitive parking assist
In the following situations, the system may not function correctly due to a
sensor malfunction, etc. Have the vehicle checked by your Toyota dealer.
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The intuitive parking assist operation display flashes, and a buzzer sounds
when no obstacles are detected.
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If the area around a sensor collides with something, or is subjected to
strong impact.
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If the bumper collides with something.
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If the display shows continuously without beeping, except when the buzzer
volume is muted.
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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.
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Notes when washing the vehicle
Do not apply intensive bursts of water or steam to the sensor area.
Doing so may result in the sensor malfunctioning.
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4-5. Using the driving support systems
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Driving assist systems
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ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenly,
or if the brakes are applied while driving on a slippery road surface
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Brake assist
Generates an increased level of braking force after the brake pedal
is depressed when the system detects a panic stop situation
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VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or
turning on slippery road surfaces
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TRAC (Traction Control)
Helps to maintain drive power and prevent the drive wheels from
spinning when starting the vehicle or accelerating on slippery roads
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Hill-start assist control
Helps to reduce the backward movement of the vehicle when start-
ing on an uphill
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EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to
turn the steering wheel
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Active Torque Control 4WD (AWD models only)
Automatically switches from front-wheel drive to AWD (All-Wheel
Drive) according to driving conditions, helping to ensure reliable
handling and stability. Examples of conditions where the system will
switch to AWD are when cornering, going uphill, starting off or
accelerating, and when the road surface is slippery due to snow or
rain etc.
To keep driving safety and performance, the following systems
operate automatically in response to various driving situations.
Be aware, however, that these systems are supplementary and
should not be relied upon too heavily when operating the vehi-
cle.
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4-5. Using the driving support systems
The slip indicator light will flash
while the TRAC/VSC systems are
operating.
If the vehicle gets stuck in mud, dirt or snow, the TRAC system may
reduce power from the engine to the wheels. Pressing
to turn the
system off may make it easier for you to rock the vehicle in order to
free it.
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Turning off the TRAC system only
When the TRAC/VSC systems are operating
Disabling the TRAC system
To turn the TRAC system off, quickly
press and release
.
The “Traction Control OFF” will be
shown on the multi-information display.
Press
again to turn the system
back on.
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Turning off both TRAC and VSC systems
To turn the TRAC and VSC systems off, press and hold
for more than 3
seconds while the vehicle is stopped.
The VSC OFF indicator light will come on and the “Traction Control Turned
Off” will be shown on the multi-information display.
*
Press
again to turn the systems back on.
*
: Pre-collision brake assist and pre-collision braking will also be disabled.
The PCS warning light will come on and the message will be shown on the
multi-information display. (
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When the message is displayed on the multi-information display show-
ing that TRAC has been disabled even if
has not been pressed
TRAC is temporary deactivated. If the information continues to show, contact
your Toyota dealer.
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Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and
hill-start assist control systems
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A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the engine is started or just after the vehicle
begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
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Any of the following conditions may occur when the above systems are
operating.
None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
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EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
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Automatic reactivation of TRAC and VSC systems
After turning the TRAC and VSC systems off, the systems will be automati-
cally re-enabled in the following situations:
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When the engine switch is turned to the “LOCK” position (vehicles without a
smart key system) or off (vehicles with a smart key system)
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If only the TRAC system is turned off, the TRAC will turn on when vehicle
speed increases
If both the TRAC and VSC systems are turned off, automatic re-enabling will
not occur when vehicle speed increases.
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4-5. Using the driving support systems
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Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of
time. The steering wheel may feel heavy as a result. Should this occur, refrain
from excessive steering input or stop the vehicle and turn the engine off. The
EPS system should return to normal within 10 minutes.
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Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will
operate:
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The shift lever is in a position other than P or N (when starting off forward/
backward on an upward incline)
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The vehicle is stopped
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The accelerator pedal is not depressed
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The parking brake is not engaged
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Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
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The shift lever is shifted to P or N
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The accelerator pedal is depressed
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The parking brake is engaged
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No more than 2 seconds have elapsed after the brake pedal is released
WARNING
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The ABS does not operate effectively when
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The limits of tire gripping performance have been exceeded (such as
excessively worn tires on a snow covered road).
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The vehicle hydroplanes while driving at high speed on wet or slick roads.
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Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, especially in the
following situations:
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When driving on dirt, gravel or snow-covered roads
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When driving with tire chains
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When driving over bumps in the road
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When driving over roads with potholes or uneven surfaces
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WARNING
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TRAC/VSC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC/VSC system is operating. Drive the
vehicle carefully in conditions where stability and power may be lost.
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Hill-start assist control does not operate effectively when
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Do not overly rely on hill-start assist control. Hill-start assist control may
not operate effectively on steep inclines and roads covered with ice.
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Unlike the parking brake, hill-start assist control is not intended to hold the
vehicle stationary for an extended period of time. Do not attempt to use
hill-start assist control to hold the vehicle on an incline, as doing so may
lead to an accident.
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When the VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.
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When the TRAC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road condi-
tions. As these are the systems to help ensure vehicle stability and driving
force, do not turn the TRAC/VSC systems off unless necessary.
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Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern
and total load capacity. In addition, make sure that the tires are inflated
to the recommended tire inflation pressure level.
The ABS, TRAC and VSC systems will not function correctly if different
tires are installed on the vehicle.
Contact your Toyota dealer for further information when replacing tires
or wheels.
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Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will
affect the driving assist systems, and may cause a system to malfunc-
tion.
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Active Torque Control 4WD system (AWD models only)
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The AWD system of this vehicle is intended to ensure driving stability on
normal roads. It is not designed for use in demanding situations such as
rally driving.
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Take care when driving on slippery road surfaces.
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Winter driving tips
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Use fluids that are appropriate to the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Washer fluid
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Have a service technician inspect the condition of the battery.
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Have the vehicle fitted with four snow tires or purchase a set of tire
chains for the front tires.
Ensure that all tires are the same size and brand, and that chains match
the size of the tires.
Perform the following according to the driving conditions:
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Do not try to forcibly open a window or move a wiper that is frozen.
Pour warm water over the frozen area to melt the ice. Wipe away
the water immediately to prevent it from freezing.
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To ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents in
front of the windshield.
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Check for and remove any excess ice or snow that may have accu-
mulated on the exterior lights, vehicle’s roof, chassis, around the
tires or on the brakes.
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Remove any snow or mud from the bottom of your shoes before
getting in the vehicle.
Carry out the necessary preparations and inspections before
driving the vehicle in winter. Always drive the vehicle in a man-
ner appropriate to the prevailing weather conditions.
Preparation for winter
Before driving the vehicle
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4
Drivin
Accelerate the vehicle slowly, keep a safe distance between you and
the vehicle ahead, and drive at a reduced speed suitable to road con-
ditions.
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Park the vehicle and move the shift lever to P without setting the
parking brake. The parking brake may freeze up, preventing it from
being released. If the vehicle is parked without setting the parking
brake, make sure block the wheels.
Failure to do so may be dangerous because it may cause the vehi-
cle to move unexpectedly, possibly leading to an accident.
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If the vehicle is parked without setting the parking brake, confirm
that the shift lever cannot be moved out of P
*
.
*
: The shift lever will be locked if it is attempted to be shifted from P to any
other position without depressing the brake pedal. If the shift lever can be
shifted from P, there may be a problem with the shift lock system. Have the
vehicle inspected by your Toyota dealer immediately.
Use the tire chains of correct size and type.
Use SAE Class “S” type radial tire chains, with the exception of radial
cable chains or V-bar type chains.
Regulations regarding the use of tire chains vary depending on loca-
tion and type of road. Always check local regulations before installing
chains.
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Tire chain installation
Observe the following precautions when installing and removing chains.
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Install and remove tire chains in a safe location.
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Install tire chains on the front tires only. Do not install tire chains on the rear
tires.
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Install tire chains on front tires as tightly as possible. Retighten chains after
driving 1/4 - 1/2 mile (0.5 - 1.0 km).
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Install tire chains following the instructions provided with the tire chains.
When driving the vehicle
When parking the vehicle
Selecting tire chains
Regulations on the use of tire chains
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WARNING
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Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in a loss of vehicle control and cause death or
serious injury.
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Use tires of the specified size.
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Maintain the recommended level of air pressure.
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Do not drive in excess of 75 mph (120 km/h), regardless of the type of
snow tires being used.
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Use snow tires on all, not just some wheels.
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Driving with tire chains
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in the vehicle being unable to be driven safely,
and may cause death or serious injury.
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Do not drive in excess of the speed limit specified for the tire chains being
used or 30 mph (50 km/h), whichever is lower.
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Avoid driving on bumpy road surfaces or over potholes.
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Avoid sudden acceleration, abrupt steering, sudden braking and shifting
operations that cause sudden engine braking.
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Slow down sufficiently before entering a curve to ensure that vehicle con-
trol is maintained.
NOTICE
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Repairing or replacing snow tires
Request repairs or replacement of snow tires from Toyota dealers or legiti-
mate tire retailers.
This is because the removal and attachment of snow tires affects the opera-
tion of the tire pressure warning valves and transmitters.
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Fitting tire chains
The tire pressure warning valves and transmitters may not function correctly
when tire chains are fitted.
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5
Interior features
5-1. Using the air conditioning
system and defogger
Front automatic air
conditioning system . . 332
Rear automatic air
conditioning system . . 341
Heated steering
wheel/seat heaters. . .. 344
• Heated steering
wheel . . . . . . . 345
• Seat heaters . . . . . 346
5-2. Using the interior lights
Interior lights list . . . . 347
• Personal/interior light
main switch . . . . ... 348
• Personal/interior
lights . . . . . . . . 348
• Rear ceiling lights . . . 349
5-3. Using the storage features
List of storage features . . 350
• Glove boxes. . . . .. 351
• Console box. . . . .. 352
• Cup holders . . . . .. 354
• Bottle holders. . . . 356
• Door pockets. . . . . 357
• Auxiliary boxes. . . .. 358
Luggage compartment
features. . . . . . ... 361
5-4. Using the other interior
features
Other interior features . ... 363
• Sun visors . . . . . . 363
• Vanity mirrors. . . . 363
• Conversation mirror . .. 364
• Power outlets . . . . 365
• USB charging ports. ... 368
• Armrests . . . . . ... 370
• Assist grips . . . . ... 371
• Rear side sunshades . 372
• Grocery bag hooks . ... 373
Garage door opener. . .. 374
Compass. . . . . . ... 381
Safety Connect . . . . . 385
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5-1. Using the air conditioning system and defogger
Front automatic air conditioning system
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Adjusting the temperature setting
Turn the “TEMP” dial clockwise to increase the temperature and
counterclockwise to decrease the temperature.
If
is not pressed, the system will blow ambient temperature
air or heated air.
Air outlets and fan speed are automatically adjusted according
to the temperature setting.
Air conditioning controls
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5-1. Using the air conditioning system and defogger
5
In
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The “SYNC” button
The air conditioning system switches between individual (indica-
tor(s) off) and simultaneous (indicators on) modes.
When the air conditioning system is in simultaneous mode, the pas-
senger and/or rear side temperature will be synchronized with
driver side’s.
The air conditioning system switches simultaneous
Press the “SYNC” button. (indicators on)
Driver side indicator
Passenger side indicator
When the indicator is on, the
passenger side temperature will
be synchronized with driver
side.
Rear side indicator
When the indicator is on
*
, the
rear side temperature will be
synchronized with driver side.
*
: When the rear air conditioning system is on. (
The air conditioning system switches individual
The temperature for the driver, passenger and/or rear seats side
can be adjusted separately.
When all indicators on the “SYNC” button are on:
• Press the “SYNC” button. (All indicators will turn off.)
• The “PASS TEMP” dial is turned. (The passenger side indicator
will turn off.)
• The “REAR TEMP” dial is turned. (The rear side indicator will
turn off.)
When two indicators on the “SYNC” button are on:
• Press the “SYNC” button a second time. (All indicators will turn
off.)
If both the temperature of the passenger and rear seats side are
changed, all indicators on the button will be off.
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2
3
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5-1. Using the air conditioning system and defogger
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Adjusting the fan speed setting
Press “
” on
to increase the fan speed and “
” to
decrease the fan speed.
Press
to turn the fan off.
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Change the airflow mode
To change the air outlets, press
the “MODE” button.
The air outlets used are
switched each time the button is
pressed.
Air flows to the upper
body.
Air flows to the upper body
and feet.
Air flows to the feet.
Air flows to the feet and
the windshield defogger
operates.
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2
3
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5-1. Using the air conditioning system and defogger
5
In
Press
(“AUTO” appears on the display).
Adjust the temperature setting.
To stop the operation, press
.
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Automatic mode indicator
If the fan speed setting or air flow modes are operated, the auto-
matic mode indicator goes off. However, automatic mode for func-
tions other than that operated is maintained.
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Adjusting the temperature setting
Press the “REAR” button (indicator and rear temperature on the
display on).
Turn the “REAR TEMP” dial clockwise to increase the tempera-
ture and counterclockwise to decrease the temperature.
The air conditioning system switches between individual (the lower side
indicator on the “SYNC” button is off) and simultaneous (the lower side
indicator on the “SYNC” button is on) modes each time the “SYNC” but-
ton is pressed.
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Adjusting the fan speed
Press “
” on
to increase the fan speed and “
” to
decrease the fan speed.
Press
to turn the fan off.
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Changing the air outlets
Press the “REAR MODE” button.
The air outlets switch each time the button is pressed. (
Using the automatic mode
Changing the rear setting
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2
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5-1. Using the air conditioning system and defogger
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Switching between outside air and recirculated air modes
Press
.
The mode switches between outside air mode (
appears on the
display) and recirculated air mode (
appears on the display) each
time the button is pressed.
?
Defogging the windshield
Defoggers are used to defog the windshield and front side win-
dows.
Press
.
Set
to outside air mode if the recirculated air mode is used. (It
may switch automatically.)
To defog the windshield and the side windows early, turn the air flow and
temperature up.
To return to the previous mode, press
again when the wind-
shield is defogged.
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Rear window defogger, outside rear view mirror defoggers (if
equipped) and windshield wiper de-icer (if equipped)
Defoggers are used to defog the rear window, and to remove rain-
drops, dew and frost from the outside rear view mirrors. The wind-
shield wiper de-icer is used to prevent ice from building up on the
windshield and wiper blades.
Press
.
The defoggers and windshield wiper de-icer will automatically turn off
after a period of time.
Other functions
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