694 4-3. Do-it-yourself maintenance
SIENNA_OM_OM45483U_(U)
■Tire types
1 Summer tiresSummer tires are high-speed performance tires best suited to highway
driving under dry conditions. Sinc e summer tires do not have the same
traction performance as snow tire s, summer tires are inadequate for
driving on snow-covered or icy roads. For driving on snow-covered
roads or icy roads, the use of snow tires is recommended. When
installing snow tires, be sure to replace all four tires.
2 All season tires All season tires are designed to provide better traction in snow and to
be adequate for driving in most winter conditions, as well as for use
year round. All season tires, however, do not have adequate traction
performance compared with snow tires in heavy or loose snow. Also,
all season tires fall short in acceleration and handling performance
compared with summer tires in highway driving.
3Snow tires
For driving on snow-covered roads or icy roads, we recommend using
snow tires. If you need snow tires, select tires of the same size, con-
struction and load capacity as the or iginally installed tires. Since your
vehicle has radial tires as original equipment, make sure your snow
tires also have radial construction. Do not install studded tires without
first checking local regulations for possible restriction. Snow tires
should be installed on all wheels. ( P. 369)
703
4-3. Do-it-yourself maintenance
4
Maintenance and care
SIENNA_OM_OM45483U_(U)
Wheels
If a wheel is bent, cracked or heavily corroded, it should be
replaced.
Otherwise, the tire may separate from the wheel or cause a loss
of handling control.
■Wheel selection
When replacing wheels, care should be taken to ensure that
they are equivalent to those removed in load capacity, diameter,
rim width and inset
*.
Replacement wheels are available at your Toyota dealer.
*: Conventionally referred to as “offset”.
Toyota does not recommend using the following:
● Wheels of different sizes or types
● Used wheels
● Bent wheels that have been straightened
■ Aluminum wheel precautions
●Use only Toyota wheel nuts and wrenches designed for use
with your aluminum wheels.
● When rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1000 miles (1600 km).
● Be careful not to damage the aluminum wheels when using
tire chains.
● Use only Toyota genuine bal ance weights or equivalent and
use a plastic or rubber hammer when balancing your wheels.
821
6-1. Specifications
6
Vehicle specifications
SIENNA_OM_OM45483U_(U)
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sure Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than 1 mile or 1.5 km under
that condition
Maximum inflation
pressure The maximum cold inflated
pressure to which a
tire may be inflated, s hown on the sidewall of
the tire
Recommended infla-
tion pressure Cold tire inflation pressure recommended by a
manufacturer
Accessory weight The combined weight (in excess of those stan-
dard items which may be replaced) of auto-
matic transmission, power steering, power
brakes, power windows, power seats, radio
and heater, to the extent that these items are
available as factory-installed equipment
(whether installed or not)
Curb weight The weight of a motor vehicle with standard
equipment, including the maximum capacity of
fuel, oil and coolant, and if so equipped, air
conditioning and additional weight optional
engine
Maximum loaded vehi-
cle weight The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
822 6-1. Specifications
SIENNA_OM_OM45483U_(U)
Tire related termMeaning
Normal occupant
weight 150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that
follows
Occupant distribution Distribution of occupants in a vehicle as speci-
fied in the third column of Table 1
* below
Production options
weight The combined weight of installed regular pro-
duction options weighing over 5 lb. (2.3 kg) in
excess of the standard items which they
replace, not previously considered in curb
weight or accessory weight, including heavy
duty brakes, ride levelers, roof rack, heavy duty
battery, and special trim
Rim A metal support for a tire or a tire and tube
assembly upon which the tire beads are seated
Rim diameter
(Wheel diameter) Nominal diameter of the bead seat
Rim size designation Rim diameter and width
Rim type designation The industry manufacturer’s designation for a
rim by style or code
Rim width Nominal distance between rim flanges
Vehicle capacity
weight (Total load
capacity) The rated cargo and luggage load plus 150 lb.
(68 kg) times the vehicle’s designated seating
capacity
Vehicle maximum load
on the tire The load on an individual tire that is determined
by distributing to each axle its share of the
maximum loaded vehicle weight, and dividing
by two
827
6-1. Specifications
6
Vehicle specifications
SIENNA_OM_OM45483U_(U)
*: Table 1
Occupant loading and distri bution for vehicle normal load
for various designated seating capacities
Tire related termMeaning
Treadwear indicators
(TWI) The projections within the principal grooves
designed to give a visual indication of the
degrees of wear of the tread
Wheel-holding fixture The fixture used to hold the wheel and tire
assembly securely
during testing
Designated seating
capacity, Number of occupantsVehicle normal load,
Number of occupantsOccupant distribution in a normally loaded vehi- cle
2 through 4 2 2 in front
5 through 10 3 2 in front, 1 in second
seat
11 through 15 5 2 in front, 1 in second
seat, 1 in third seat, 1
in fourth seat
16 through 20 7 2 in front, 2 in second
seat, 2 in third seat, 1
in fourth seat
861
Alphabetical index
SIENNA_OM_OM45483U_(U)
I/M test ...................................... 664
Identification
Engine .................................. 799
Vehicle.................................. 799
Ignition switch ................. 228, 231
Illuminated entry system ........ 587
Indicator lights ........................ 249
Initialization Items to initialize ................... 836
Inside rear view mirror............ 139
Interior lights Interior lights ......................... 582
Switch ................................... 583
Wattage ................................ 809
Intuitive parking assist ........... 318
Jack
Positioning a floor jack ......... 671
Vehicle-equipped jack .......... 761
Jack handle.............................. 761
Keyless entry ............................. 53
Keys Electronic key ......................... 32
Engine switch ............... 228, 231
If you lose your keys............. 780
If the electronic key does not operate
properly .............................. 781
Ignition switch ............... 228, 231
Keyless entry .......................... 53
Key number ............................ 32
Keys ....................................... 32
Mechanical key....................... 32
Wireless remote control.......... 53 License plate lights
Replacing light bulbs .............724
Wattage .................................809
Light bulbs Replacing ..............................724
Wattage .................................809
Lights Door courtesy lights ..............582
Engine switch light ................582
Fog light switch .....................284
Headlight switch ....................270
Interior light switch ................583
Luggage compartment light .......................................85
Outer foot lights .....................582
Personal light switch .............583
Rear ceiling light....................586
Replacing light bulbs .............724
Turn signal lever....................243
Vanity lights ...........................607
Wattage .................................809
Load capacity ...........................368
Lock steering column ......229, 235
Luggage compartment light Switch......................................85
Wattage .................................809I
J
K
L
864 Alphabetical index
SIENNA_OM_OM45483U_(U)
Spare tireInflation pressure................... 808
Storage location .................... 761
Spark plug ................................ 803
Specifications........................... 798
Speech command switch ........ 551
Speedometer ............................ 246
Steering wheel Adjustment ............................ 138
Audio switches ...................... 479
Column lock release...... 229, 235
Stop lights
Replacing light bulbs ............. 724
Storage feature......................... 588
Storage precautions ................365
Stuck If your vehicle becomes stuck ................................... 793
Sunshades Rear door .............................. 619
Roof....................................... 151
Sun visors................................. 606
Switch
Engine switch ................ 228, 231
Fog light switch ..................... 284
Ignition switch................ 228, 231
Light switches........................ 270
Power back door .....................82
Power door lock switch ...........61
Power window switch .... 145, 149
Window lock switch ............... 145
Wiper and washer switch .......................... 286, 294 Tachometer .............................. 246
Tail lights
Replacing light bulbs ............. 724
Switch ................................... 270
Wattage................................. 809
Talk switch ............................... 551
Telephone switch..................... 551
Theft deterrent system Alarm..................................... 163
Engine immobilizer system ... 160
Theft prevention labels ........... 167
Tire inflation pressure ............. 699
Tire information Glossary ................................ 821
Size ....................................... 807
Tire identification number...... 816
Uniform tire quality grading................................ 818
Tires Chains ................................... 369
Checking ............................... 688
If you have a flat tire...... 759, 761
Inflation pressure .................. 699
Information ............................ 814
Replacing .............................. 761
Rotating tires ......................... 689
Size ....................................... 807
Snow tires ............................. 369
Tire pressure warning system ........................ 688, 748
Tools ......................................... 761
Total load capacity .................. 368T
866 Alphabetical index
SIENNA_OM_OM45483U_(U)
WeightCargo capacity ...................... 360
Load limits ............................. 368
Weight ................................... 798
Wheels ...................................... 703
Window glasses .............. 145, 149
Window lock switch ................. 145
Windows Power windows ............. 145, 149
Rear window defogger .......... 421
Washer .......................... 286, 294
Windshield wiper de-icer......... 421
Windshield wipers ................... 286
Wireless remote control key Replacing the battery ............ 708
Wireless remote control ..........53
WMA disc .................................. 447