Page 390 of 872

390 2-5. Driving information
SIENNA_OM_OM45483U_(U)
CAUTION
■Trailer towing precautions
To tow a trailer safely, use extreme care and drive the vehicle in accordance
with the trailer’s characteristics and operating conditions. Failure to do so
could cause an accident resulting in death or serious injury. Vehicle stability
and braking performance are affected by trailer stability, brake setting and
performance, and the hitch. Your vehicle will handle differently when towing
a trailer.
■ To avoid accident or injury
●Do not exceed the TWR, unbraked TWR, GCWR, GVWR or GAWR.
● If the gross trailer weight is over 2000 lb. (907 kg), a sway control device
with sufficient capacity is required.
● Adjust the tongue weight within the appropriate range. Place heavier loads
as close to the trailer axle as possible.
● Do not exceed 65 mph (104 km/h), the posted towing speed limit or the
speed limit for your trailer as set forth in your trailer owner’s manual,
whichever is lowest. Slow down sufficiently before making a turn, in cross-
winds, on wet or slippery surface, etc. to help avoid an accident. If you
experience a vehicle-trailer instability from reducing a certain speed, slow
down and make sure you keep your vehicle speed under the speed of
which you experience the instability.
● Do not make jerky, abrupt or sharp turns.
● Do not apply the brakes suddenly as you may skid, resulting in jackknifing
and loss of vehicle control. This is especially true on wet or slippery sur-
faces.
● Do not exceed the trailer hitch assembly weight, gross vehicle weight,
gross axle weight and trailer tongue weight capacities.
Page 391 of 872

391
2-5. Driving information
2
When driving
SIENNA_OM_OM45483U_(U)
CAUTION
■
To avoid accident or injury
●Do not use cruise control when towing.
● Slow down and downshift before descending steep or long downhill
grades. Do not make sudden downshifts while descending steep or long
downhill grades.
● Vehicle-trailer instability is more likely on steep long downhills. Before
descending steep or long downhill grades, slow down and downshift. Do
not make sudden downshifts when descending steep or long downhill
grades. Avoid holding the brake pedal down too long or applying the
brakes too frequently. This could cause the brakes to overheat and result
in reduced braking efficiency.
● Vehicles with compact spare tire: Do not tow a trailer when the compact
spare tire is installed on your vehicle.
■ Hitch
Trailer hitch assemblies have different weight capacities established by the
hitch manufacturer. Even though the vehicle may be physically capable of
towing a higher weight, the operator must determine the maximum weight
rating of the particular hitch assembly and never exceed the maximum
weight rating specified for the trailer-hitch. Exceeding the maximum weight
rating set by the trailer-hitch manufacturer can cause an accident resulting in
death or serious personal injuries.
Page 392 of 872

392 2-5. Driving information
SIENNA_OM_OM45483U_(U)
CAUTION
■When towing a trailer
Toyota recommends trailers with brakes that conform to any applicable fed-
eral and state/provincial regulations.
●If the gross trailer weight exceeds unbraked TWR, trailer brakes are
required. Toyota recommends trailers with brakes that conform to all appli-
cable federal and state/provincial regulations.
● Never tap into your vehicle’s hydraulic system, as this will lower the vehi-
cle’s braking effectiveness.
● Never tow a trailer without using a safety chain securely attached to both
the trailer and the vehicle. If damage occurs to the coupling unit or hitch
ball, there is danger of the trailer wandering into another lane.
NOTICE
■When installing a trailer hitch
Use only the position recommended by your Toyota dealer. Do not install the
trailer hitch on the bumper; this may cause body damage.
■ Do not directly splice trailer lights
Do not directly splice trailer lights. Directly splicing trailer lights may damage
your vehicle’s electrical system and cause a malfunction.
Page 393 of 872
393
2-5. Driving information
2
When driving
SIENNA_OM_OM45483U_(U)
Dinghy towing
NOTICE
■To avoid serious damage to your vehicle
■ To prevent causing serious damage to the transaxle and Active Torque
Control 4WD system (AWD models)
Your vehicle is not designed to be dinghy towed (with 4 wheels on
the ground) behind a motor home.
Do not tow your vehicle with four wheels
on the ground.
ITN25N009
2WD models: Never tow this vehicle from
the rear with the front wheels on the
ground. This may cause serious damage
to the transaxle.
AWD models: Never tow this vehicle with
any of the wheels on the ground. This
may cause serious damage to the tran-
saxle and Active Torque Control 4WD
system.
ITN25N010
ITN25N011
Page 514 of 872

514 3-4. Using the rear audio system
SIENNA_OM_OM45483U_(U)
CAUTION
■While driving
Do not use headphones.
Doing so may cause an accident, resulting in death or serious injury.
■ When the rear seat entert ainment system is not used
Keep the display closed.
In the event of an accident or sudden braking, the opened display may hit an
occupant’s body, resulting in injury.
■ To prevent accidents and electric shock
Do not disassemble or modify the remote controller.
■ When the remote controller is not used
Stow the remote controller.
Injuries may result in the event of an accident or sudden braking.
■ Removed battery and other parts
Keep away from children. These parts are small and if swallowed by a child
they can cause choking. Failure to do so could result in death or serious
injury.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents.
●Always work with dry hands.
Moisture may cause the battery to rust.
● Do not touch or move any other components inside the remote controller.
● Do not bend either of the battery terminals.
Page 547 of 872

547
3-5. Using the hand
s-free phone system (for cellular phone)
3
Interior features
SIENNA_OM_OM45483U_(U)
■Conditions under which the system will not operate
●If using a mobile phone that does not support Bluetooth
®
●If the mobile phone is switched off
● If you are outside service range
● If the mobile phone is not connected
● If the mobile phone’s battery is low
● If the mobile phone is behind the seat or in the glove box or console box
● If metal is covering or touching the phone
■ When using the hands-free system
●The audio system and voice guidance are muted when making a call.
● If both parties speak at the same time, it may be difficult to hear.
● If the incoming call volume is overly loud, an echo may be heard.
● Try to face toward the microphone as much as possible when speaking.
● In the following circumstances, it may be difficult to hear the other party:
• When driving on unpaved roads
• When driving at high speeds
• When a window is open
• When the air conditioning is blowing directly on the microphone
• When the air conditioning is set to high
■ When transferring ownership of the vehicle
Be sure to initialize the system to prevent personal data from being improp-
erly accessed.
Page 599 of 872
599
3-7. Using the
storage features
3
Interior features
SIENNA_OM_OM45483U_(U)
CAUTION
■Items unsuitable for the bottle holder
Do not place anything other than a bottle in the bottle holders.
Other items may be thrown out of the holders in the event of an accident or
sudden braking and cause injury.
NOTICE
■When stowing a bottle
Put the cap on before stowing a bottle. Do not place open bottles in the bot-
tle holders. The contents may spill.
Type B: Make sure items in the sliding door bottle holder will not interfere
with the motion of the door before operating the door. Items that protrude
from the bottle holder may prevent door opening or damage the vehicle.
Bottle holders
Page 621 of 872
621
3-8. Other interior features
3
Interior features
SIENNA_OM_OM45483U_(U)
CAUTION
■
When not in use (type C)
Keep the grocery bag hook stowed.
Injuries may result in the event of sudden braking, sudden swerving or an
accident.
NOTICE
■Grocery bag hook weight capacity (type A and B)
Do not hang any object heavier than 8.8 lb. (4 kg) on the grocery bag hook.
Type D (luggage compartment)
ITN38N036