2014 TOYOTA SIENNA cooling

790
5-2. Steps to take in an emergency
SIENNA_OM_OM45483U_(U)
If your vehicle overheats
Correction proceduresStop the vehicle in a safe place and turn off the air condition-
ing system, and then stop the engine.
If you see steam: Carefully lift the hood after the steam subsides.
If you do not see steam: Carefully lift the hood.
After the engine has cooled
down sufficiently, inspect the
hoses and radiator core (radia-
tor) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The following may indicate that your vehicle is overheating:
●The needle of the engine co olant temperature gauge (P. 246)
enters the red zone or a loss of engine power is experienced.
(For example, the vehicl e speed does not increase.)
● Steam is coming from under the hood.
STEP1
STEP2
STEP5STEP3

5
When trouble arises
791
5-2. Steps to take in an emergency
SIENNA_OM_OM45483U_(U)
The coolant level is satisfactory if
it is between the “FULL” and
“LOW” lines on the reservoir.
Reservoir
“FULL”
“LOW”
Radiator cap
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the engine and turn the air conditioning system on to
check that the radiator cooling fans operate and to check for
coolant leaks from the radiator or hoses.
The fans operate when the air conditioning system is turned on
immediately after a cold start. Conf irm that the fans are operating by
checking the fan sound and air flow. If it is difficult to check these,
turn the air conditioning system on and off repeatedly. (The fans may
not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact your Toyota
dealer.
If the fans are operating: Have the vehicle inspected at the nearest Toyota dealer.
STEP4
STEP5
STEP6
STEP7

792 5-2. Steps to take in an emergency
SIENNA_OM_OM45483U_(U)
CAUTION
■To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
● Keep hands and clothing (especially a tie, a scarf or a muffler) away from
the fan and belts. Failure to do so may cause the hands or clothing to be
caught, resulting in serious injury.
● Do not loosen the radiator cap or the coolant reservoir cap while the
engine and radiator are hot. Serious injury, such as burns, may result from
hot coolant and steam released under pressure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too
quickly can cause damage to the engine.
■ To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
● Do not use commercially available coolant additives.

803
6-1. Specifications
6
Vehicle specifications
SIENNA_OM_OM45483U_(U)
Cooling system
Ignition system
Capacity
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-sili-cate, non-amine, non-nitrite, and non-borate coolant
with long-life hybrid organic acid technology
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.

858 Alphabetical index
SIENNA_OM_OM45483U_(U)
CleaningExterior .................................. 648
Interior ................................... 653
Seat belts .............................. 654
Clock ................................. 256, 608
Compass ................................... 634
Condenser ................................ 680
Console box ............................. 591
Conversation mirror ................609
Cooling system Engine overheating ............... 790
Cruise control
Cruise control ....................... 297
Dynamic radar cruise control ................................. 302
Cup holders .............................. 595
Curtain shield airbags ............. 170
Customizable features............. 828 Daytime running light
system .................................... 274
Defogger
Rear window ......................... 421
Side mirrors........................... 421
Dimension ................................ 798
Dinghy towing .......................... 393
Display Dynamic radar cruise
control ................................. 302
Multi-information display ....... 256
Trip information ..................... 256
Warning messages ............... 758
Do-it-yourself maintenance .... 665
Door courtesy lights Door courtesy lights .............. 582
Wattage................................. 809
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........................... 141
Sliding doors ........................... 67
Driver’s seat belt reminder light ......................................... 747
Driving Break-in tips .......................... 216
Correct posture ..................... 168
Procedures............................ 214
Winter driving tips ................. 369
Driving position memory ........ 121
DVD player........ 515, 525, 529, 530D