2016 TOYOTA SIENNA radiator

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SIENNA_OM_OM08013U_(U)
7-3. Do-it-yourself maintenance
■Coolant selection
Only use “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.
U.S.A.:
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deion-
ized water.
(Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deion-
ized water.
(Minimum temperature: -44 F [-42 C])
For more details about engine coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir caps, drain cock
and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.
WARNING
■When the engine is hot
Do not remove the engine coolant reservoir cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.

SIENNA_OM_OM08013U_(U)
4877-3. Do-it-yourself maintenance
7
Maintenance and care
Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is ex tremely dirty or you are not sure of
their condition, have yo ur vehicle inspected by your Toyota dealer.
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
“MAX” line
“MIN” line
■Adding fluid
Lift the cover off.
Make sure to check the fluid ty pe and prepare the necessary item.
Radiator and condenser
WARNING
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause seri-
ous injuries, such as burns.
Brake fluid
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2
Fluid typeFMVSS No.116 DOT 3 or SAE J1703 brake fluid
ItemClean funnel

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8
When trouble arises
8-2. Steps to take in an emergency
If your vehicle overheats
●The needle of the engine coolant temperature gauge ( P. 8 8 )
enters the red zone or a loss of engine power is experienced. (For
example, the vehicle sp eed does not increase.)
● The warning message indicating overheats is shown on the multi-
information display. ( P. 555)
● Steam is coming from under the hood.
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, 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 su fficiently, inspect the hoses and
radiator core (radiator) 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.
Correction procedures
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2
3
1
2

5928-2. Steps to take in an emergency
SIENNA_OM_OM08013U_(U)
The coolant level is satisfactory if it is between the “FULL” and
“LOW” lines on the reservoir.
Reservoir
“FULL” line
“LOW” line
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 oper ate and to check for coolant leaks
from the radiator or hoses.
The fans operate when the air conditioning system is turned on immedi-
ately after a cold start. Confirm that the fans are operating by checking the
fan sound and air flow. If it is difficult to check these, turn the air condition-
ing system on and off repeatedly. (The fans may not operate in freezing
temperatures.)
If the fans are not operating:
Stop the engine immediately an d contact your Toyota dealer.
If the fans are operating:
Have the vehicle in spected at the nearest Toyota dealer.
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3
4
5
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5938-2. Steps to take in an emergency
SIENNA_OM_OM08013U_(U)
8
When trouble arises
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●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.
● 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.
● Do not loosen the radiator cap or the coolant reservoir cap while the
engine and radiator are hot. High temperature steam or coolant could
spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cooled down sufficiently. 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 any coolant additive.

662Alphabetical index
SIENNA_OM_OM08013U_(U)
Parking assist sensors (intuitive parking assist) ....... 275
Parking brake ........................... 238 Operation .............................. 238
Parking brake engaged warning
buzzer/message ......... 541, 554
Parking lights
Light switch ........................... 239
Replacing light bulbs..... 521, 527
Wattage ................................ 606
PCS (Pre-Collision System) Function ................................ 298
Pre-collision braking off switch ................................. 299
Warning light ......................... 542
Warning message ............. 551, 556, 560
Personal lights Switch ................................... 424
Wattage ................................ 606
Power back door...................... 133
Power outlets ........................... 441
Power windows Jam protection function......... 185
Operation .............................. 184
Window lock switch............... 184
Pre-collision system (PCS) Function ................................ 298
Pre-collision braking off switch ................................. 299
Warning light ......................... 542
Warning message ............. 551, 556, 560 Quarter windows ..................... 187
Radar cruise control
(dynamic radar cruise
control)................................... 263
Radiator .................................... 487
Radio
*...................................... 336
Rear automatic air conditioning system ............. 417
Rear ceiling light ..................... 425
Rear seat
Adjustment............................ 152
Folding third seats ........ 159, 160
Installing second seats ......... 158
Removing second seats ....... 156
Stowing third seats ....... 161, 163
Rear seat entertainment system
*
Rear turn signal lights Replacing light bulbs ............ 524
Turn signal lever ................... 237
Wattage ................................ 606
Rear view mirror Compass .............................. 453
Inside rear view mirror .......... 179
Outside rear view mirrors ..... 181
Rear view monitor system ...... 283
Rear window defogger ............ 412
Rear window wiper .................. 254
Replacing Electronic key battery ........... 507
Fuses .................................... 510
Light bulbs ............................ 513
Rear seat entertainment system control battery
*
Tires...................................... 568
Wireless remote control battery ................................ 507
PQ
R