2015 TOYOTA HIGHLANDER engine coolant

5047-3. Do-it-yourself maintenance
HIGHLANDER_U (OM48E98U)■
3.5 L V6 (2GR-FE) engine
Washer fluid tank
( P. 514)
Fuse boxes ( P. 535)
Engine oil filler cap ( P. 506)
Engine oil level dipstick ( P. 505)
Engine coolant reservoir ( P. 508) Battery
( P. 5 1 1 )
Brake fluid reservoir ( P. 510)
Electric cooling fans
Condenser ( P. 509)
Radiator ( P. 509)1
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5087-3. Do-it-yourself maintenance
HIGHLANDER_U (OM48E98U)
The coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold.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 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.
Engine coolant
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5097-3. Do-it-yourself maintenance
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Maintenance and care
HIGHLANDER_U (OM48E98U)
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.
WARNING
■When the engine is hot
Do not remove the engine coolant reservoir cap and radiator 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.
Radiator and condenser
WARNING
■When the engine 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.

5618-2. Steps to take in an emergency
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When trouble arises
HIGHLANDER_U (OM48E98U)
●Fluid leaks under the vehicle.
(Water dripping from the air co nditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points higher
than normal.
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
● Engine missing, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spon gy feeling, pedal almost touches
the floor
If you think something is wrong
If you notice any of the follow ing symptoms, your vehicle proba-
bly needs adjustment or repair. Contact your Toyota dealer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

5788-2. Steps to take in an emergency
HIGHLANDER_U (OM48E98U)
Color display only
Indicates that the engine coolant temperature is
too highA buzzer also sounds.
 P. 626
Color display onlyIndicates a malfunction in the vehicle’s charging
system.
Immediately stop the vehicle in a safe place
and contact your Toyota dealer. Continuing
to drive the vehicle may be dangerous.
Color display only
(If equipped)
Indicates that the radar sensor is dirty or covered
with ice A buzzer also sounds.
 Clean the sensor.
Color display only
(If equipped)
Indicates that the dynamic radar cruise control
system is unable to judge vehicle-to-vehicle dis-
tance
A buzzer also sounds.
 Turn off snow mode.
If the windshield wipers are on, turn them
off or set them to a mode other than high
speed wiper operation.
(If equipped)
Indicates that the LDA (Lane Departure Alert)
system is suspended (The camera sensor tem-
perature is higher than the operation temperature
range)
A buzzer also sounds.
 Restart the LDA after driving for a while.
(If equipped)
Indicates that a Blind Spot Monitor sensor or the
surrounding area on the bumper is dirty or cov-
ered with ice
A buzzer also sounds.
 Clean the sensor and its surrounding area
on the bumper.
Warning messageDetails/Actions

6268-2. Steps to take in an emergency
HIGHLANDER_U (OM48E98U)
●The needle of the engine coolant temperature gauge ( P. 9 4 )
enters the red zone or a loss of engine power is experienced. (For
example, the vehicle sp eed does not increase.)
● Steam comes out 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 sufficient ly, 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 coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir.Reservoir
“FULL”
“LOW”
Radiator cap
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
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6278-2. Steps to take in an emergency
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When trouble arises
HIGHLANDER_U (OM48E98U)
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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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 fans and belts.
● Do not loosen the radiator cap and the coolant reservoir cap while the
engine and radiator are hot.
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6288-2. Steps to take in an emergency
HIGHLANDER_U (OM48E98U)
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.