2019 TOYOTA HIGHLANDER cooling

6458-2. Steps to take in an emergency
8
When trouble arises
HIGHLANDER_U
WARNING
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally ignit ing the flam-
mable gas that may be emitted from the battery:
● Make sure each jumper cable is connected to the correct terminal and that
it is not unintentionally in contact with any other than the in tended terminal.
● Do not allow the other end of the jumper cable connected to the “+” termi-
nal to come into contact with any other parts or metal surfaces in the area,
such as brackets or unpainted metal.
● Do not allow the + and - clamps of the jumper cables to come in to contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open fla me near
the battery.
■ Battery precautions
The battery contains poisonous and corrosive acidic electrolyte , while
related parts contain lead and lead compounds. Observe the foll owing pre-
cautions when handling the battery:
● When working with the battery, always wear safety glasses and t ake care
not to allow any battery fluids (acid) to come into contact wit h skin, clothing
or the vehicle body.
● Do not lean over the battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medica l attention
can be received.
● Always wash your hands after handling the battery support, term inals, and
other battery-related parts.
● Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not beco me entan-
gled in the cooling fans or engine drive belt.

6468-2. Steps to take in an emergency
HIGHLANDER_U
●The needle of the engine coolant temperature gauge ( P. 9 8 )
enters the red zone or a loss of engine power is experienced. ( For
example, the vehicle speed does not increase.)
● Steam comes out f rom under the hood.
Stop the vehicle in a safe place and turn off the air condition ing 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 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 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
1
2
3
1
2
4
1
2
3
4

6478-2. Steps to take in an emergency
8
When trouble arises
HIGHLANDER_U
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 immedi-
ately after a cold start. Confirm that the fans are operating b y 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 ins pected at the nearest Toyota dealer.
5
WARNING
■When inspecting under th e 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 ho od 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 wh ile the
engine and radiator are hot.
6
7

6488-2. Steps to take in an emergency
HIGHLANDER_U
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cooled down sufficientl y. Adding
cool coolant to a hot engine too quickly can cause damage to th e engine.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sa nd or dust
etc.).
● Do not use any coolant additive.

6589-1. Specifications
HIGHLANDER_U
Cooling system
Capacity
(Reference)
2.7 L 4-cylinder
(1AR-FE)
engine10.7 qt. (10.1 L, 8.9 Imp. qt.)
3.5 L V6 (2GR-
FKS) engine
Vehicles without the Stop & Start sys-
tem
12.9 qt. (12.2 L, 10.7 Imp. qt.)
Vehicles with the Stop & Start system
13.0 qt. (12.3 L, 10.8 Imp. qt.)
Coolant type Use either of the following.
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-silicate, non-amine, non-
nitrite, and non-borate coolant with
long-life hybrid organic acid technol-
ogy
Do not use plain water alone.
Ignition system
Spark plug
Make2.7 L 4-cylinder (1AR-FE) engine
DENSO SK16HR11
3.5 L V6 (2GR-FKS) engine
DENSO FK20HBR8
Gap
2.7 L 4-cylinder (1AR-FE) engine
0.043 in.(1.1 mm)
3.5 L V6 (2GR-FKS) engine
0.031 in. (0.8 mm)
NOTICE
■ Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark pl ug gap.

718Alphabetical index
HIGHLANDER_U
Care................................... 502, 506Aluminum wheels.................. 503
Exterior ................................. 502
Interior................................... 506
Seat belts .............................. 507
Cargo hooks............................. 473
CD player .................................. 375
Chains....................................... 348
Child restraint system ............... 61 Booster seats, definition ......... 62
Booster seats, installation ....... 73
Convertible seats, definition ............................... 62
Convertible seats,
installation ............................ 69
Front passenger occupant classification syst em............. 53
Infant seats, definition ............. 62
Infant seats, installation .......... 69
Installing CRS with LATCH anchors .................... 67
Installing CRS with seat belts ...................................... 69
Installing CRS with top tether strap ........................... 75 Child safety ................................ 60
Airbag precautions.................. 43
Back door precautions .......... 135
Battery precautions....... 530, 645
Child restraint system ............. 61
Glass hatch precautions ....... 144
How your child should wear the seat belt.......................... 36
Installing child restraints ......... 65
Moon roof precautions .......... 185
Panoramic moon roof precautions......................... 190
Power window lock switch .... 179
Power window precautions ... 181
Rear door child-protectors .... 126
Removed electronic key battery precautions............. 553
Seat belt extender precautions........................... 39
Seat belt precautions .............. 38
Seat heater precautions ....... 461
Child-protectors ...................... 126
Cleaning ........................... 502, 506 Aluminum wheels ................. 503
Exterior ................................. 502
Interior .................................. 506
Seat belts.............................. 507
Clock......................................... 479
Coat hooks ............................... 487
Compass .................................. 496
Condenser................................ 527
Console box ............................. 467
Conversation mirror ................ 479
Cooling system........................ 526 Engine overheating............... 646
Cruise control
Dynamic radar cruise control ................................ 291
Cup holders ............................. 469
Curtain shield airbags............... 41
Customizable features ............ 682
C