TOYOTA SIENNA 2013 XL30 / 3.G Owners Manual

371
2-5. Driving information
2
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.

377
2-5. Driving information
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When driving
SIENNA_OM_OM45472U_(U)
Trailer Tongue Weight
● A recommended tongue weight varies in accordance with the types
of trailers or towing as described below.
● To ensure the recommended values shown below, the trailer must
be loaded by referring to the following instructions.
• Tongue Weight
The gross trailer weight should be distributed so that the tongue
weight is 9 to 11 %.
(Tongue weight / Gross trailer weight  100 = 9 to 11 %)
Gross trailer weight
Tongue weight
If using a weight distributing hitch when towing, return the front
axle to the same weight as before the trailer connection.
If front axle weight cannot be measured directly, measure the front
fender height above the front axle before connection. Adjust weight
distributing hitch torque until fr ont fender is returned to the same
height as before connection.
The gross trailer weight, gross axle weight and tongue weight can
be measured with platform scales found at a highway weighing sta-
tion, building supply company, trucking company, junk yard, etc.

378 2-5. Driving information
SIENNA_OM_OM45472U_(U)
HitchTrailer hitch assemblies have different weight capacities. Toyota rec-
ommends the use of Toyota hitch/brac ket for your vehicle. For details,
contact your Toyota dealer.
● If you wish to install a trailer hitch, contact your Toyota dealer.
● Use only a hitch that c onforms to the gross trailer weight require-
ment of your vehicle.
● Follow the directions supplied by the hitch manufacturer.
● Lubricate the hitch ball with a light coating of grease.
● Remove the trailer hitch whenever you are not towing a trailer.
After removing the hitch, seal any mounting hole in the vehicle
body to prevent entry of any substances into the vehicle.

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2-5. Driving information
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When driving
SIENNA_OM_OM45472U_(U)
Selecting trailer ball
Use the correct trailer ball for your application. Trailer ball load rating
Matches or exceeds the gross
trailer weight rating of the trailer.
Ball diameter
Matches the size of the trailer
coupler. Most couplers are
stamped with the required trailer
ball size.
Shank length
Protrudes beyond the bottom of
the lock washer and nut at least 2
threads.
Shank diameter
Matches the ball mount hole
diameter size.
Trailer
classTypical trailer ball
size
IV2 5/16 in.
II and III2 in.
I1 7/8 in.

380 2-5. Driving information
SIENNA_OM_OM45472U_(U)
Positions for towing hitch receiverHitch receiver pin hole posi-
tion: 37.3 in. (949.8 mm)
Connecting trailer lightsPlease consult your dealer when inst alling trailer lights, as incorrect
installation may cause damage to the vehicle’s lights. Please take
care to comply with your state’ s laws when installing trailer lights.