2012 TOYOTA SIENNA engine

640 4-2. Maintenance
SIENNA_U (OM45477U)
■Allow inspection and repairs to be performed by a Toyota dealer
● Toyota technicians are well-trained specialists and are kept up to date
with the latest service information. They are well informed about the
operations of all systems on your vehicle.
● Keep a copy of the repair order. It proves that the maintenance that has
been performed is under warranty coverage. If any problem should arise
while your vehicle is under warranty, your Toyota dealer will promptly
take care of it.
■ Reset the maintenance data (U.S.A. only)
After the required maintenance is preformed according to the maintenance
schedule, please reset the maintenance data.
To reset the data, follow the procedures described below:
Vehicles without a smart key system
Switch the display to the trip meter A ( P. 244) and then turn the
engine switch off.
Vehicles with a smart key system
Switch the display to the trip meter A ( P. 244) and then turn the
“ENGINE START STOP” switch off.
Vehicles without a smart key system
While pressing the trip meter reset button ( P. 244), turn the
engine switch to the “ON” position.
Vehicles with a smart key system
While pressing the trip meter reset button ( P. 244), turn the
“ENGINE START STOP” switch to IGNITION ON mode.
Vehicles without a multi-information display
Continue to press and hold the button until the trip meter A displays
“000000”.
Vehicles with a multi-information display
Continue to press and hold the button until “COMPLETE” appears
on the multi-information display.
STEP1
STEP2
STEP3

641
4-2. Maintenance
4
Maintenance and care
SIENNA_U (OM45477U)
CAUTION
■
If your vehicle is not properly maintained
Improper maintenance could result in serious damage to the vehicle and
possible serious injury or death.
■ Handling of the battery
● Engine exhaust, some of its constituents, and a wide variety of automobile
components contain or emit chemicals known to the State of California to
cause cancer and birth defects and other reproductive harm. Work in a
well ventilated area.
● Oils, fuels and fluids contained in vehicles as well as waste produced by
component wear contain or emit chemicals known to the State of
California to cause cancer and birth defects or other reproductive harm.
Avoid exposure and wash any affected area immediately.
● Battery posts, terminals and related accessories contain lead and lead
compounds which are known to cause brain damage. Wash your hands
after handling. ( P. 667)

642
4-2. Maintenance
SIENNA_U (OM45477U)
General maintenance
Engine compartment
ItemsCheck points
Battery Check the indicator and
connections. (
P. 667)
Brake fluid Is the brake fluid at the correct
level?
(P. 665)
Engine coolant Is the engine coolant at the
correct level? (
P. 662)
Engine oil Is the engine oil at the correct
level?
(P. 657)
Exhaust system There should not be any fumes or
strange sounds.
Radiator/condenser The radiator and condenser
should be free from foreign
objects.
(P. 664)
Washer fluid Is there sufficient washer fluid?
(P. 671)
Listed below are the general maintenance items that should be per-
formed at the intervals specified in the “Owner’s Warranty Informa-
tion Booklet” or “Owner’s Manual Supplement/Scheduled
Maintenance Guide”. It is recommended that any problem you notice
should be brought to the attention of your Toyota dealer or qualified
service shop for advice.

645
4-2. Maintenance
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Maintenance and care
SIENNA_U (OM45477U)
Vehicle exterior
ItemsCheck points
Doors • Do the doors operate smoothly?
Engine hood • Does the engine hood lock sys-
tem work properly?
Fluid leaks • There should not be any signs of
fluid leakage after the vehicle has
been parked.
Tires • Is the tire inflation pressure cor-
rect?
• The tires should not be dam- aged or excessively worn.
• Have the tires been rotated according to the maintenance
schedule?
• The wheel nuts should not be loose.
CAUTION
■ If the engine is running
Turn the engine off and ensure that there is adequate ventilation before per-
forming maintenance checks.

647
4
Maintenance and care
SIENNA_U (OM45477U)
4-3. Do-it-yourself maintenance
Do-it-yourself ser vice precautions
If you perform maintenance yourself, be sure to follow the correct
procedures as given in these sections.
ItemsParts and tools
Battery condition (P. 667)
•Warm water
• Baking soda
• Grease
• Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( P. 665)
• FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant level ( P. 662)
• “Toyota Super Long Life Coolant”
or similar high quality ethylene
glycol based non-silicate, non-
amine, non-nitrite and non-borate
coolant with long-life hybrid
organic acid technology.
For the U.S.A.:
“Toyota Super Long Life
Coolant” is pre-mixed with 50 %
coolant and 50 % deionized
water.
For Canada:
“Toyota Super Long Life
Coolant” is pre-mixed with 55 %
coolant and 45 % deionized
water.
• Funnel (used only for adding engine coolant)

648 4-3. Do-it-yourself maintenance
SIENNA_U (OM45477U)
ItemsParts and tools
Engine oil levelP. 657)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses (P. 696)• Fuse with same amperage rating
as original
Light bulbs (P. 709)
• Bulb with same number and watt-
age rating as original
• Phillips-head screwdriver
• Flathead screwdriver
• Wrench
Radiator and condenser (P. 664)
Tire inflation pressure ( P. 683)• Tire pressure gauge
• Compressed air source
Washer fluid (P. 671)
• Water or washer fluid containing
antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

649
4-3. Do-it-yourself maintenance
4
Maintenance and care
SIENNA_U (OM45477U)
CAUTION
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury, observe the following precautions:
■
When working on the engine compartment:
● Keep hands, clothing and tools away from the moving fan and engine
drive belt.
● Be careful not to touch the engine, radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil and other fluids may also be hot.
● Do not leave anything that may burn easily, such as paper and rags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel or the bat-
tery. Fuel and battery fumes are flammable.
● Be extremely cautious when working on the battery. It contains poisonous
and corrosive sulfuric acid.
■ When working near the electric c ooling fans or radiator grille
Vehicles without a smart key system: Be sure the engine switch is off. With
the engine switch in the “ON” position, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant tempera-
ture is high. ( P. 664)
Vehicles with a smart key system: Be sure the “ENGINE START STOP”
switch is off. With the “ENGINE START STOP” switch in IGNITION ON
mode, the electric cooling fans may automatically start to run if the air condi-
tioning is on and/or the coolant temperature is high. ( P. 664)

650 4-3. Do-it-yourself maintenance
SIENNA_U (OM45477U)
CAUTION
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear
due to dirt in the air. Also a backfire could cause a fire in the engine compart-
ment.