2010 TOYOTA SIENNA cooling

536
5-2. Steps to take in an emergency
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 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

546 6-1. Specifications
Cooling system
Ignition system
Electrical system
Capacity
(Reference)12.0 qt. (11.3 L, 10.0 Imp.qt.)
Coolant typeUse either of the following.
• “Toyota Super Long Life Coolant”
• 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
Gap DENSO FK20HR11
0.043 in. (1.1 mm)
NOTICE
■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust spark plug gap.
Battery
Open voltage at
68 F (20 C): 12.6  12.8 V Fully charged
12.2  12.4 V Half charged
11 . 8
 12.0 V Discharged
(Voltage checked 20 minutes after the engine and
all the lights turned off)
Charging rates 5 A max.

580 Alphabetical index
CleaningExterior .................................. 418
Interior ................................... 421
Seat belts .............................. 422
Clock ......................................... 385
Coat hooks ............................... 396
Coin holder ............................... 369
Compass ................................... 413
Condenser ................................ 446
Console box ............................. 365
Conversation mirror ................386
Cooling system
Engine overheating ............... 536
Cornering assist sensors ........ 209
Cruise control
Cruise control ....................... 194
Dynamic laser cruise control ................................. 197
Cup holders .............................. 370
Curtain shield airbags ............. 118
Customizable features............. 565 Daytime running light
system .................................... 188
Defogger Rear window ......................... 260
Side mirrors........................... 260
Dimension ................................ 542
Dinghy towing .......................... 237
Display Dynamic laser cruise control ................................. 197
Trip information ..................... 181
Do-it-yourself maintenance .... 430
Door courtesy lights Door courtesy lights .............. 361
Wattage................................. 549
Doors Back door ................................ 47
Door glasses ......................... 100
Door lock ..................... 27, 33, 38
Front doors.............................. 33
Side mirrors............................. 97
Sliding doors ........................... 37
Driver's seat belt reminder
light ......................................... 507
Driving Break-in tips .......................... 159
Correct posture ..................... 116
Procedures............................ 158
Winter driving tips ................. 226
Driving position memory .......... 80
DVD player........ 303, 312, 315, 316D