2013 TOYOTA SIENNA Owners Manual

369
2-5. Driving information
2
When driving
SIENNA_OM_OM45472U_(U)
■
Tire chain installation
Observe the following precautions when installing and removing chains.
● Install and remove tire chains in a safe location.
● Install tire chains on the front tires only. Do not install tire chains on the
rear tires.
● Install tire chains on front tires as tightly as possible. Retighten chains
after driving 1/4 - 1/2 mile (0.5 - 1.0 km).
● Install tire chains following the instructions provided with the tire chains.
CAUTION
■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.
● Use tires of the size specified.
● Maintain the recommended level of air pressure.
● Do not drive in excess of 75 mph (120 km/h), regardless of the type of
snow tires being used.
● Use snow tires on all, not just some wheels.

370 2-5. Driving information
SIENNA_OM_OM45472U_(U)
CAUTION
■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.
● 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.
● Avoid driving on bumpy road surfaces or over potholes.
● Avoid sudden turns and braking, as use of chains may adversely affect
vehicle handling.
● Slow down sufficiently before entering a curve to ensure that vehicle con-
trol is maintained.
NOTICE
■Repairing or replacing snow tires
Request repairs of or replacement of snow tires from Toyota dealers or legit-
imate tire retailers.
This is because the removal and attachment of snow tires affects the opera-
tion of the tire pressure warning valves and transmitters.
■ Fitting tire chains
The tire pressure warning valves and transmitters may not function correctly\
when tire chains are fitted.

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2-5. Driving information
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When driving
SIENNA_OM_OM45472U_(U)
Trailer towing (with towing package)
Your vehicle is designed primarily as a passenger-and-load-carrying
vehicle. Towing a trailer can have an adverse impact on handling,
performance, braking, durability, and fuel consumption. For your
safety and the safety of others, you must not overload your vehicle
or trailer. You must also ensure that you are using appropriate tow-
ing equipment, that the towing equipment has been installed cor-
rectly and used properly, and that you employ the requisite driving
habits.
Vehicle-trailer stability and br aking performance are affected by
trailer stability, brake performance and setting, trailer brakes, the
hitch and hitch systems (if equipped).
To tow a trailer safely, use extreme care and drive the vehicle in
accordance with your trailer’s ch aracteristics and operating condi-
tions.
Toyota warranties do not apply to damage or malfunction caused by
towing a trailer fo r commercial purposes.
Contact your Toyota dealer for fu rther information about additional
requirements such as a towing kit, etc.

372 2-5. Driving information
SIENNA_OM_OM45472U_(U)
Towing related terms■ GCWR (Gross Combination Weight Rating)
The maximum allowable gross
combination weight. The gross
combination weight is the sum of
the total vehicle weight (including
the occupants, cargo and any
optional equipment installed on
the vehicle) and the weight of the
trailer being towed (including the
cargo in the trailer).
■ GVWR (Gross Vehi cle Weight Rating)
The maximum allowable gross
vehicle weight. The gross vehicle
weight is the total weight of the
vehicle. When towing a trailer, it
is the sum of the vehicle weight
(including the occupants, cargo
and any optional equipment
installed on the vehicle) and the
tongue weight.

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2-5. Driving information
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When driving
SIENNA_OM_OM45472U_(U)
■
GAWR (Gross Axle Weight Rating)
The maximum allowable gross
axle weight. The gross axle
weight is the load placed on
each axle (front and rear).
■ TWR (Trailer Weight Rating)
The maximum allowable gross
trailer weight. The gross trailer
weight is the sum of the trailer
weight and the weight of the
cargo in the trailer.
TWR is calculated assuming
base vehicle with one driver, one
front passenger, towing package
(if available), hitch and hitch sys-
tems (if required).
Additional optional equipment,
passengers and cargo in the vehi-
cle will reduce the trailer weight
rating so as not to exceed
GCWR, GVWR and GAWR.
If the gross trailer weight exceeds
3000 lb. (1360 kg), it is recom-
mended to use a trailer with 2 or
more axles.
Front GAWR
Rear GAWR
(With brakes)

374 2-5. Driving information
SIENNA_OM_OM45472U_(U)■
Unbraked TWR (Unbraked Trailer Weight Rating)
The trailer weight rating for tow-
ing a trailer without a trailer ser-
vice brake system.
■ Tongue Weight
The load placed on the trailer
hitch ball. (P. 377)
(Without brakes)

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2-5. Driving information
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When driving
SIENNA_OM_OM45472U_(U)
Weight limits
● The gross trailer weight must never exceed 3500 lb. (1588 kg).
● The gross combination weight must never exceed the GCWR
described below.
2WD models: 8900 lb. (4037 kg)
AWD models: 8990 lb. (4078 kg) ●The gross vehicle weight must
never exceed the GVWR indi-
cated on the Certification
Label.
● The gross axle weight on each
axle must never exceed the
GAWR indicated on the Certi-
fication Label.
● If the gross trailer weight is over the unbraked TWR, trailer service
brakes are required.
● If the gross trailer weight is over 2000 lbs. (907 kg), a sway control
device with sufficient capacity is required.

376 2-5. Driving information
SIENNA_OM_OM45472U_(U)
GCWR, TWR and Unbraked TWR Confirm that the gross trailer weight, gross combination weight, gross
vehicle weight, gross axle weight and tongue weight are all within the
limits.
■ GCWR

2WD models: 8900 lb. (4037 kg)
AWD models: 8990 lb. (4078 kg)
■ TWR

3500 lb. (1588 kg)
■ Unbraked TWR

1000 lb. (454 kg)
: These models meet the tow-vehicle trailering requirement of SAE Interna-
tional per SAE J2807.