2016 TOYOTA HIGHLANDER cooling

6318-2. Steps to take in an emergency
8
When trouble arises
HIGHLANDER_U (OM48F09U)
WARNING
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting 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 intended 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 into contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open flame near
the battery.
■ Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while
related parts contain lead and lead compounds. Observe the following pre-
cautions when handling the battery:
●When working with the battery, always wear safety glasses and take care
not to allow any battery fluids (acid) to come into contact with 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 medical attention
can be received.
● Always wash your hands after handling the battery support, terminals, 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 become entan-
gled in the cooling fan or engine drive belt.

6328-2. Steps to take in an emergency
HIGHLANDER_U (OM48F09U)
●The needle of the engine coolant temperature gauge ( P. 9 2 )
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
1
2
3
1
2
4
1
2
3
4

6338-2. Steps to take in an emergency
8
When trouble arises
HIGHLANDER_U (OM48F09U)
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.
5
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.
6
7

6348-2. Steps to take in an emergency
HIGHLANDER_U (OM48F09U)
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.

6449-1. Specifications
HIGHLANDER_U (OM48F09U)
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-
FE) engine
Without towing package
12.3 qt. (11.6 L, 10.2 Imp. qt.)
With towing package
12.6 qt. (11.9 L, 10.5 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-FE) engine
DENSO FK20HR11
Gap0.043 in. (1.1 mm)
NOTICE
■ Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

703Alphabetical index
HIGHLANDER_U (OM48F09U)
Child-protectors....................... 124
Cleaning ........................... 488, 492Aluminum wheels.................. 489
Exterior ................................. 488
Interior................................... 492
Seat belts .............................. 493
Clock ......................................... 461
Coat hooks ............................... 468
Compass .................................. 483
Condenser ................................ 514
Console box ............................. 451
Conversation mirror ................ 460
Cooling system ........................ 513 Engine overheating ............... 632
Cruise control Cruise control........................ 263
Dynamic radar cruise control................................. 268
Cup holders.............................. 453
Curtain shield airbags ............... 41
Customizable features ............ 668 DAC (Downhill Assist
Control system).................... 307
Daytime running light system.................................... 242
Deck board ............................... 458
Defogger
Outside rear view mirrors ........................ 428, 434
Rear window ................. 428, 434
Windshield .................... 427, 434
Dimensions .............................. 638
Dinghy towing.......................... 224
Display Drive information ............ 95, 101
Dynamic radar cruise
control ................................ 268
LDA (Lane Departure
Alert)................................... 284
Multi-information display ............................ 95, 99
Warning message ................ 578
Do-it-yourself maintenance .... 503
Door lock Doors .................................... 119
Smart key system ................. 119
Wireless remote control ........ 120D