2015 TOYOTA SIENNA radiator

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SIENNA_OM_01999-08001_(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_01999-08001_(U)
4837-3. 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
1
2
Fluid typeFMVSS No.116 DOT 3 or SAE J1703 brake fluid
ItemClean funnel

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SIENNA_OM_01999-08001_(U)
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. 551)
● 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

5888-2. Steps to take in an emergency
SIENNA_OM_01999-08001_(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 and contact your Toyota dealer.
If the fans are operating:
Have the vehicle in spected at the nearest Toyota dealer.
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1
2
3
4
5
6
7

5898-2. Steps to take in an emergency
SIENNA_OM_01999-08001_(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.

658Alphabetical index
SIENNA_OM_01999-08001_(U)
Parking assist sensors (intuitive parking assist) ....... 273
Parking brake ........................... 236 Operation .............................. 236
Parking brake engaged warning
buzzer/message ......... 537, 550
Parking lights
Light switch ........................... 237
Replacing light bulbs..... 517, 523
Wattage ................................ 602
PCS (Pre-Collision System) Function ................................ 296
Pre-collision braking off switch ................................. 297
Warning light ......................... 538
Warning message ............. 547, 552, 556
Personal lights Switch ................................... 420
Wattage ................................ 602
Power back door...................... 132
Power outlets ........................... 437
Power windows Jam protection function......... 184
Operation .............................. 183
Window lock switch............... 183
Pre-collision system (PCS) Function ................................ 296
Pre-collision braking off switch ................................. 297
Warning light ......................... 538
Warning message ............. 547, 552, 556 Quarter windows ..................... 186
Radar cruise control
(dynamic radar cruise
control)................................... 261
Radiator .................................... 483
Radio
*...................................... 335
Rear automatic air conditioning system ............. 413
Rear ceiling light ..................... 421
Rear seat
Adjustment............................ 151
Folding third seats ........ 158, 159
Installing second seats ......... 157
Removing second seats ....... 155
Stowing third seats ....... 160, 162
Rear seat entertainment system
*
Rear turn signal lights Replacing light bulbs ............ 520
Turn signal lever ................... 235
Wattage ................................ 602
Rear view mirror Compass .............................. 449
Inside rear view mirror .......... 178
Outside rear view mirrors ..... 180
Rear view monitor system ...... 281
Rear window defogger ............ 408
Rear window wiper .................. 252
Replacing Electronic key battery ........... 503
Fuses .................................... 506
Light bulbs ............................ 509
Rear seat entertainment system control battery
*
Tires...................................... 564
Wireless remote control battery ................................ 503
PQ
R