2016 TOYOTA HIGHLANDER HYBRID radiator cap

4026-3. Do-it-yourself maintenance
HIGHLANDER_HV_U (OM48F12U)
Engine compartment
Washer fluid tank (P. 409)
Brake fluid reservoir ( P. 408)
Engine oil filler cap ( P. 404)
Engine oil level dipstick ( P. 403)
Engine coolant reservoir ( P. 406) Power control unit coolant
reservoir (
P. 406)
Fuse boxes ( P. 434)
Electric cooling fans
Condenser ( P. 407)
Power control unit coolant
radiator ( P. 407)
Radiator ( P. 407)1
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4066-3. Do-it-yourself maintenance
HIGHLANDER_HV_U (OM48F12U)
The coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the hybrid system is cold.
Engine coolant reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line.
Power control unit coolant reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line.
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a 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 coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/power control unit 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.
Coolant
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4076-3. Do-it-yourself maintenance
HIGHLANDER_HV_U (OM48F12U)
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Maintenance and care
Check the radiator and condenser and clear away any foreign objects.
If any of the above parts is extremel y dirty or you are not sure of their
condition, have your vehicle insp ected by your Toyota dealer.
WARNING
■When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir caps.
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.
Radiator and condenser
WARNING
■When the hybrid system is hot
Do not touch the radiator or condenser as they may be hot and cause seri\
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ous injuries, such as burns.

5267-2. Steps to take in an emergency
HIGHLANDER_HV_U (OM48F12U)
The coolant level is satisfac-
tory 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 hybrid system and turn the air conditioning system on to
check that the radiator cooling fans operate and to check for
coolant leaks from th e 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 con-
ditioning system on and off repeatedly.
(The fan may not operate in freezing temperatures.)
If the fans are not operating:
Stop the hybrid system immediately and contact your Toyota
dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Toyota dealer.
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5287-2. Steps to take in an emergency
HIGHLANDER_HV_U (OM48F12U)
■Messages displays
The message illustrations used are intended as examples, and may differ
from the image that is actually displayed on the multi-information display.
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.
● After the hybrid system has been turned off, check that the “READY” indi-
cator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fan may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the radiator cap and the coolant reservoir caps while the
hybrid system and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently.
Adding cool coolant to a hot hybrid system too quickly can cause damage to
the hybrid system.
■ 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.

602Alphabetical index
HIGHLANDER_HV_U (OM48F12U)
Power windows........................ 179Door lock linked
window operation ............... 181
Jam protection function......... 180
Operation .............................. 179
Window lock switch............... 180
Pre-Collision System (PCS) ...................................... 300
Function ................................ 300
PCS OFF switch ................... 301
Warning light ......................... 462
Radar cruise control (dynamic radar cruise control) ............. 271
Radiator .................................... 407
Radio
*
Rear automatic air conditioning system ............. 335
Rear personal lights ................ 342
Wattage ................................ 543
Rear seat .................................. 158 Adjustment ............................ 158
Folding down ................ 160, 162
Rear seat entertainment system
*
Rear side marker lights ........... 244 Light switch ........................... 244
Replacing light bulbs............. 438
Wattage ................................ 543
Rear sunshade ......................... 359
Rear turn signal lights............. 242 Replacing light bulbs............. 438
Turn signal lever ................... 242
Wattage ................................ 543
Rear view mirror
Inside rear view mirror .......... 175
Outside rear view mirrors...... 177
Rear view monitor system
*
Rear window defogger ............ 330
Rear window wiper .................. 259 Refueling .................................. 261
Capacity................................ 535
Fuel types ............................. 535
If the fuel filler door cannot be opened .............. 264
Opening the fuel tank cap..... 263
Replacing Electronic key battery ........... 432
Fuses .................................... 434
Light bulbs ............................ 438
Tires...................................... 490
Reporting safety defects for U.S. owners...................... 574
Resetting the message
indicating maintenance is
required.................................. 390
Road accident cautions ............ 89
Roof rails .................................. 208
R