
478
SIENNA_OM_OM08013U_(U)
7-3. Do-it-yourself maintenance
WARNING
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 cooling fans or radiator grille
Be sure the engine switch is in the “LOCK” position (vehicles without a
smart key system) or off (vehicles with a smart key system). With the engine
switch in the “ON” position (vehicles without a smart key system) or IGNI-
TION ON mode (vehicles with a smart key system), the electric cooling fans
may automatically start to run if the air conditioning is on and/or the coolant
temperature is high. ( P. 487)
■ 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.

SIENNA_OM_OM08013U_(U)
4837-3. Do-it-yourself maintenance
7
Maintenance and care
With the engine at operating temperature and turned off, check the oil
level on the dipstick.
■Checking the engine oilPark the vehicle on level ground. After warming up the engine
and turning it off, wait more than 5 minutes for the oil to drain
back into the bottom of the engine.
Holding a rag under the end,
pull the dipstick out.
Wipe the dipstick clean.
Reinsert the dipstick fully.
Holding a rag under the end, pull the dipstick out and check the
oil level.
Low
Normal
Excessive
The shape of the dipstick may
differ depending on the type of
vehicle or engine.
Wipe the dipstick and reinsert it fully.
Engine oil
1
2
3
4
5
1
2
3
6

SIENNA_OM_OM08013U_(U)
6019-1. Specifications
9
Vehicle specifications
■Engine oil selection
“Toyota Genuine Motor Oil” is used in your Toyota vehicle. Use
Toyota approved “Toyota Genuine Motor Oil” or equivalent to satisfy
the following grade and viscosity.
Oil grade: ILSAC GF-5 multigrade engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice
for good fuel economy and
good starting in cold weather.
If SAE 0W-20 is not available,
SAE 5W-20 oil may be used.
However, it must be replaced
with SAE 0W-20 at the next oil
change.
Oil viscosity (0W-20 is explained here as an example): • The 0W in 0W-20 indicates the characteristic of the oil which
allows cold startability. Oils wi th a lower value before the W allow
for easier starting of the engine in cold weather.
• The 20 in 0W-20 indicates the viscosity characteristic of the oil when the oil is at high temperature. An oil with a higher viscosity
(one with a higher value) may be better suited if the vehicle is
operated at high speeds, or under extreme load conditions.
How to read oil container label:
The International Lubricant
Specification Advisory Commit-
tee (ILSAC) Certification Mark
is added to some oil containers
to help you select the oil you
should use.
Outside temperature

657Alphabetical index
SIENNA_OM_OM08013U_(U)
Emergency, in case ofIf a warning buzzer
sounds ................................ 541
If a warning light turns on...... 541
If a warning message is displayed ............................ 550
If the battery is discharged.... 587
If the electronic key does not operate properly ........... 585
If the engine will not start ...... 582
If the shift lever cannot be shifted from P ..................... 584
If you have a flat tire .... 566, 568
If you lose your keys ............. 107
If you think something is wrong.................................. 539
If your vehicle becomes
stuck ................................... 594
If your vehicle has to be stopped in an emergency ... 533
If your vehicle needs to be towed .................................. 535
If your vehicle overheats ....... 591
Engine “ACC” position ...................... 225
Accessory mode ................... 229
Compartment ........................ 482
Engine switch................ 225, 228
Hood ..................................... 479
How to start the engine......................... 225, 228
Identification number ............ 599
If the engine will not start ...... 582
Ignition switch (engine switch) ........... 225, 228
Overheating .......................... 591 Engine coolant
Capacity................................ 602
Checking............................... 485
Preparing and checking before winter ...................... 313
Engine coolant temperature gauge ....................................... 88
Engine immobilizer system ...... 75
Engine oil
Capacity................................ 600
Checking............................... 483
Oil pressure warning light ..... 541
Oil pressure warning message............................. 557
Preparing and checking before winter ...................... 313
Engine switch .................. 225, 228
EPS (Electronic Power Steering)
Function ................................ 293
Warning light......................... 542
Warning message................. 553
Event data recorder (EDR)........ 10
*: Refer to “NAVIGATION AND MULTIMEDIA
SYSTEM OWNER’S MANUAL”

661Alphabetical index
SIENNA_OM_OM08013U_(U)
MaintenanceDo-it-yourself
maintenance ....................... 477
General maintenance ........... 473
Maintenance data ................. 598
Maintenance requirements ... 470
Malfunction indicator lamp ..... 541
Manual headlight leveling dial .......................................... 241
Meter Indicators ................................ 82
Instrument panel light
control ..................................... 89
Meters ..................................... 87
Multi-information
display ............................ 90, 93
Warning lights ....................... 541
Warning messages ............... 550
Microphone .............................. 368
Mirrors Conversation mirror .............. 440
Inside rear view mirror .......... 179
Outside rear view mirror defoggers ........................... 412
Outside rear view mirrors...... 181
Vanity mirrors........................ 439
Moon roof
Jam protection function......... 190
Operation .............................. 189
MP3 disc
*................................. 338
Multi-information display .... 90, 93 Cruise control........................ 259
Drive information............... 90, 95
Dynamic radar cruise control................................. 263
Intuitive parking assist .......... 275
Settings display..................... 623
Warning messages ............... 550 Navigation system
*Noise from under vehicle ........... 8
Odometer ................................... 88
Oil
Engine oil .............................. 600
Opener
Back door ............................. 134
Fuel filler door ....................... 256
Hood ..................................... 479
Outer foot lights Outer foot lights .................... 423
Replacing light bulbs ............ 527
Outside rear view mirrors Adjusting and folding ............ 181
BSM (Blind spot monitor)...... 305
Driving position memory ....... 169
Outside rear view mirror defoggers ........................... 412
Outside temperature display...................................... 88
Overhead console ................... 434
Overheating, Engine ............... 591
MN
O
*: Refer to “NAVIGATION AND MULTIMEDIA
SYSTEM OWNER’S MANUAL”