cooling TOYOTA HIGHLANDER 2012 XU40 / 2.G Owners Manual

268
3-1. Using the air conditioning system and defogger
Front manual air conditioning system
Adjusting the settings■ Adjusting the temperature setting
Turn the temperature control dial clockwise (warm) or counter-
clockwise (cool).
If is not pressed, the system will blow ambient temperature air or
heated air.
For quick cooling, turn the temperature selector knob to the “MAX A/C”
position. The air conditioning will automatically turn on in (recir-
culated air) mode.
Fan speed control dial
Air outlet selection dial
Air conditioning on/off switch
Temperature control dial
Outside air or recirculated air mode
Rear air conditioning
on/off switch (if equipped)
: If equipped

455
4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury observe the following precautions.
■
When working on the engine compartment
●Keep hands, clothing, and tools away from the moving fan and engine
drive belt.
● Be careful not to touch the engine, radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil and other fluids may also be hot.
● Do not leave anything that may burn easily, such as paper or rags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel or the bat-
tery. Fuel and battery fumes are flammable.
● Be extremely cautious when working on the battery. It contains poisonous
and corrosive sulfuric acid.
● Take care because brake fluid can harm your hands or eyes and damage
painted surfaces.
If fluid gets on your hands or in your eyes, flush the affected area with
clean water immediately.
If you still experience discomfort, see a doctor.
● Do not touch the engine compartment when the electric cooling fan is
operating.
Vehicles without smart key system: The electric cooling fan may keep
rotating for about 3 minutes even after the engine switch is turned to the
“LOCK” position.
With the engine switch in the “ON” position, the electric cooling fan may
automatically start to run if the air conditioning is on and/or the coolant
temperature is high. Be sure the engine switch is in the “LOCK” position
when working near the electric cooling fan or radiator grille.
Vehicles with smart key system: The electric cooling fan may keep rotating
for about 3 minutes even after the “ENGINE START STOP” switch is OFF.
With the “ENGINE START STOP” switch in IGNITION ON mode, the elec-
tric cooling fan may automatically start to run if the air conditioning is on
and/or the coolant temperature is high. Be sure the “ENGINE START
STOP” switch is OFF when working near the electric cooling fan or radia-
tor grille.

463
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compar tment
2.7 L 4-cylinder (1AR-FE) engine
Washer fluid tank (P. 477)
Engine oil filler cap ( P. 467)
Engine oil level dipstick ( P. 466)
Engine coolant reservoir ( P. 469)Battery ( P. 473)
Brake fluid reservoir ( P. 472)
Fuse boxes ( P. 499)
Electric cooling fans
Condenser ( P. 471)
Radiator ( P. 471)

464 4-3. Do-it-yourself maintenance
3.5 L V6 (2GR-FE) engine
Washer fluid tank (P. 477)
Engine oil filler cap ( P. 467)
Engine oil level dipstick ( P. 466)
Engine coolant reservoir ( P. 469)Battery ( P. 473)
Brake fluid reservoir ( P. 472)
Fuse boxes ( P. 499)
Electric cooling fans
Condenser ( P. 471)
Radiator ( P. 471)

470 4-3. Do-it-yourself maintenance
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, engine coolant filler cap, radiator cap,
drain cock and water pump.
If you cannot find a leak, have your Toyota dealer test the cap opening pres-
sure and check for leaks in the cooling system.
■ 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% deionized water. (Enabled: -31 F [-35 C])
Canada: Toyota Super Long Life Coolant is a mixture of 55% coolant and 45% deionized water. (Enabled: -44 F [-42 C])
For more details about engine coolant, contact your Toyota dealer.
CAUTION
■ When the engine is hot
Do not remove the coolant reservoir cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing burns or other injuries.
NOTICE
■When adding engine coolant
Coolant is neither plain water nor stra ight 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 damage to parts or paint.

471
4-3. Do-it-yourself maintenance
4
Maintenance and care
Radiator and condenser
Check the radiator and condenser, and clear away any foreign
objects.
If either of the above parts are extremely dirty or you are not sure of
their condition, have your vehicl e checked by your Toyota dealer.
CAUTION
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and may cause
burns.
■ When the electric coolin g fans are operating
Do not touch the engine compartment.
Vehicles without smart key system: The electric cooling fans may keep rotat-
ing for about 3 minutes after the engine switch is turned to the “LOCK” posi-
tion.
With the engine switch in the “ON” position, the electric cooling fans may
automatically start to run if the air conditioning is on and/or the coolant tem-
perature is high. Be sure the engine switch is in the “LOCK” position when
working near the electric cooling fan or radiator grille.
Vehicles with smart key system: The electric cooling fan may keep rotating
for about 3 minutes even after the “ENGINE START STOP” switch is OFF.
With the “ENGINE START STOP” switch in IGNITION ON mode, the electric
cooling fans may automatically start to run if the air conditioning is on and/or
the coolant temperature is high. Be sure the “ENGINE START STOP” switch
is OFF when working near the electric cooling fans or radiator grille.

503
4-3. Do-it-yourself maintenance
4
Maintenance and care
4 DEF RLY
10 A Rear window defogger
5 MIR HTR 10 A Outside rear view mirror defoggers
6 PWR OUTLET 20 A Power outlet
7 DOOR NO.1 25 A Multiplex communication system
8 EFI NO.2 10 AMultiport fuel injection system/
sequential multiport fuel injection
system
9 EFI NO.3 10 AMultiport fuel injection system/
sequential multiport fuel injection
system
10 INJ NO.1 15 A Starting system
11 INJ NO.2 10 AMultiport fuel injection system/
sequential multiport fuel injection
system
12 HTR 50 A Air conditioning system
13 VSC NO.1 50 A Enhanced vehicle stability control
system
14 FAN MAIN 50 A Electric cooling fans
15 VSC NO.2 30 A Enhanced vehicle stability control
system
16 PTC NO.1 50 A Air conditioning system
17 PTC NO.2 30 A Air conditioning system
18 PTC NO.3 30 A Air conditioning system
19 RR CLR 40 A Air conditioning system
20 RR DEF 30 A Rear window defogger
21 PBD 30 A Power back door
22 ALT 140 AMIR HTR, PWR OUTLET, DOOR
NO.1, HTR, RR DEF, FAN MAIN,
VSC NO.1, PTC NO.1, RR CLR,
PTC NO.2, PTC NO.3, VSC NO.2,
PBD
FuseAmpereCircuit

5
When trouble arises
563
5-2. Steps to take in an emergency
CAUTION
■
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 the jumper cable is connected to the correct terminal and that it
is not unintentionally in contact with any part other than the intended termi-
nal.
● 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
Be careful that the jumper cables do not become tangled in the cooling fan
or any of the belts when connecting or disconnecting them.

564
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the engine. Carefully lift the hood after the steam
subsides and then restart the engine.
If you do not see steam: Leave the engine running and carefully lift the hood.
Check to see if the cooling fans are operating.
If the fans are operating: Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the
engine.
If the fans are not operating: Stop the engine and call your Toyota dealer.
After the engine has cooled
down sufficiently, check the
engine coolant level and
inspect the radiator core (radi-
ator) for any leaks.
If the engine compartment
cover needs to be removed.
(P. 465)
Engine coolant reservoir
Radiator
STEP1
STEP2
STEP3
STEP4

580 6-1. Specifications
Cooling system
*: With towing package
Capacity
(Reference)
2.7 L 4-cylin-
der (1AR-FE)
engineWithout rear air conditioning system
7.3 qt. (6.9 L, 6.1 Imp. qt.)
8.0 qt. (7.6 L, 6.7 Imp. qt.)*
With rear air conditioning system
9.6 qt. (9.1 L, 8.0 Imp. qt.)
10.4 qt. (9.8 L, 8.6 Imp. qt.)*
3.5 L V6
(2GR-FE)
engine Without rear air conditioning system
9.3 qt. (8.8 L, 7.7 Imp. qt.)
10.0 qt. (9.5 L, 8.4 Imp. qt.)*
With rear air conditioning system
11.6 qt. (11.0 L, 9.7 Imp. qt.)
12.4 qt. (11.7 L, 10.3 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 technology
Do not use plain water alone.