2012 TOYOTA SIENNA cooling

774 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
CAUTION
■Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while
related parts contain lead and lead compounds. Observe the following pre-
cautions when handling the battery:
● When working with the battery, always wear safety glasses and take care
not to allow any battery fluids (acid) to come into contact with skin, clothing
or the vehicle body.
● Do not lean over the battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
● Always wash your hands after handling the battery support, terminals, and
other battery-related parts.
● Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-
gled in the cooling fans or belt.
■ To prevent damage to the engine cover
● When removing the cover, make sure that you pull the cover towards you
after lifting the front edge to remove the fixed pins.
● When installing the cover, do not force the cover or subject it to strong
shocks.

5
When trouble arises
775
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the engine. Carefully lift the hood after the steam
subsides and then restart the engine.
If you do not see steam: Leave the engine running and carefully lift the hood.
Check to see if the cooling fans are operating.
If the fans are operating: Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the
engine.
If the fans are not operating: Stop the engine immediately and call your Toyota dealer.
After the engine has cooled
down sufficiently, check the
engine coolant level and
inspect the radiator core (radi-
ator) for any leaks.STEP1
STEP2
STEP3
STEP5STEP4

790 6-1. Specifications
SIENNA_U (OM45477U)
Cooling system
Ignition system
Capacity 1AR-FE engine
2GR-FE engine 9.2 qt. (8.7 L, 7.7 Imp.qt.)
Without towing package
11.0 qt. (10.4 L, 9.2 Imp.qt.)
With towing package 11.7 qt. (11.1 L, 9.8 Imp.qt.)
Coolant type Use either of the following.
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-based non-silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid technol-
ogy
Do not use plain water alone.
Spark plug
Make DENSO 1AR-FE engine
2GR-FE engine
Gap SK16HR11
FK20HR11
0.043 in. (1.1 mm)
NOTICE
■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust spark plug gap.

846 Alphabetical index
SIENNA_U (OM45477U)
CleaningExterior .................................. 630
Interior ...................................635
Seat belts ..............................636
Clock ................................. 252, 592
Compass ...................................617
Condenser ................................664
Console box ............................. 575
Conversation mirror ................593
Cooling system Engine overheating ............... 775
Cruise control
Cruise control ....................... 293
Dynamic radar cruise control .................................298
Cup holders ..............................579
Curtain shield airbags ............. 168
Customizable features............. 815 Daytime running light
system .................................... 270
Defogger
Rear window ......................... 405
Side mirrors........................... 405
Dimension ................................ 784
Dinghy towing .......................... 376
Display Dynamic radar cruise
control ................................. 298
Multi-information display ....... 252
Trip information ..................... 252
Warning messages ............... 744
Do-it-yourself maintenance .... 647
Door courtesy lights Door courtesy lights .............. 566
Wattage................................. 796
Door lock
Back door ................................ 82
Front door ............................... 60
Sliding door ............................. 67
Wireless remote control key ........................................ 53
Doors Back door ................................ 82
Door lock ..................... 53, 60, 68
Front doors.............................. 60
Side mirrors........................... 140
Sliding doors ........................... 67
Driver’s seat belt reminder light ......................................... 733
Driving Break-in tips .......................... 214
Correct posture ..................... 166
Procedures............................ 212
Winter driving tips ................. 352
Driving position memory ........ 120
DVD player........ 499, 509, 513, 514D