Toyota 2003 Sienna Owner's Manual page 252

A safety chain must always be used
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between the towing vehicle and the
trailer. Leave sufficient slack in the
chain for turns. The chain should
cross under the trailer tongue to
prevent the tongue from dropping to
the ground in case it becomes dam-
aged or separated. For correct safety
chain procedures, follow the hitch or
trailer manufacturer's recommenda-
tions.
CAUTION
If the total trailer weight exceeds
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453 kg (1000 lb.), trailer brakes are
required.
Never tap into your vehicle's hy-
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draulic system as it would lower its
braking effectiveness.
Never tow a trailer without using a
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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 over into another
lane.
248
03 SIENNA_U (L/O 0207)
TIRES
Ensure that your vehicle's tires are
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properly inflated. Adjust the tire pres-
sure to the recommended cold tire
pressure indicated below. (See Section
7−2 and Section 8 for instructions.):
2
Tire pressure, kPa (kgf/cm or bar, psi)
240 (2.4, 35)
The trailer tires should be inflated to
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the pressure recommended by the trail-
er manufacturer in respect to the total
trailer weight.
TRAILER LIGHTS
Trailer lights must comply with federal,
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state/provincial and local regulations.
See your local recreational
dealer or rental agency for the correct
type of wiring and relays for your trail-
er. Check for correct operation of the
turn signals and stop lights each time
you hitch up. Direct splicing may dam-
age your vehicle's electrical system
and cause a malfunction of your lights.
2003 MY SIENNA (OM45410U)
BREAK−IN SCHEDULE
Toyota recommends that you do not
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tow a trailer with a new vehicle or a
vehicle with any new power train com-
ponent (engine, transmission, differen-
tial, wheel bearing, etc.) for the first
800 km (500 miles) of driving.
MAINTENANCE
If you tow a trailer, your vehicle will
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require more frequent maintenance due
to the additional
information, please
scheduled maintenance information in
the "Scheduled Maintenance Guide" or
"Owner's Manual Supplement".
Retighten all fixing bolts of the towing
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vehicle
ball and bracket after approximately
1000 km (600 miles) of trailer driving.
PRE−TOWING SAFETY CHECK
Check that your vehicle remains level
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when a loaded or unloaded trailer is
hitched. Do not drive if the vehicle has
an abnormal nose−up or nose−down
condition, and check
tongue load, overload, worn suspension
or other possible causes.
Make sure the trailer cargo is securely
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loaded so that it cannot shift.
load. For this
refer to the
for improper