2012 TOYOTA COROLLA cooling system

217
3-1. Using the air conditioning system
and defogger
3
Interior features
■For quick cooling (vehicles wi th air conditioning system)
Turn the temperature control dial to the “MAX A/C” position and select the
recirculated air mode.
■ For quick clearing of th e windshield and side windows (vehicles with
air conditioning system)
Press to turn the air conditioning on.
■ Using the recirculated air mode
The windows will fog up more easily if the recirculated air mode is used for
an extended period.
■ When outside air temperature appro aches 32°F (0°C) (vehicles with air
conditioning system)
The air conditioning system may not operate even when
is pressed.
■ When
is selected for the air outlets used
For your driving comfort, air flowing to the feet may be warmer than air flow-
ing to the upper body depending on the position of the temperature adjust-
ment dial.
■ Air conditioning odors
●During use, various odors from inside and outside the vehicle may enter
into and accumulate in the air conditioning system. This may then cause
odor to be emitted from the vents.
● To reduce potential odors from occurring:
It is recommended that the air conditioning system be set to outside air
mode prior to turning the vehicle off.

347
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.
■ When working near the electric c ooling fans or radiator grille
Vehicles with smart key system: Be sure 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. ( P. 361)
Vehicles without smart key system: Be sure the engine switch is OFF. With
the engine switch in the “ON” position, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant tempera-
ture is high. ( P. 361)
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in the eyes.

360 4-3. Do-it-yourself maintenance
Engine coolantThe coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold.
Reservoir cap
“FULL”
“LOW”
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line. (P. 456)
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, coolant reservoir cap, radiator cap, 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 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 serious injuries, such as burns.

393
4-3. Do-it-yourself maintenance
4
Maintenance and care
Fuse layout and amperage ratings
■ Engine compartment
FuseAmpereCircuit
1 H-LP CLN 30 A No circuit
2 RDI FAN 40 A Electric cooling fan(s)
3 ABS NO. 3 30 A Anti-lock brake system, vehicle sta-
bility control system
4 ABS NO. 1 50 A Anti-lock brake system, vehicle sta-
bility control system
5 HTR 50 A Air conditioning system
6 ALT 120 A Charging system, RDI FAN, ABS
NO. 1, ABS NO. 3, HTR, HTR SUB
NO. 1, HTR SUB NO. 3, ACC, CIG,
ECU-IG NO. 2, HTR-IG, WIPER,
WASHER, ECU-IG NO. 1, AM1,
DOOR, STOP, FR DOOR,
POWER, RR DOOR, RL DOOR,
OBD, ACC-B, FR FOG, DEF, MIR
HTR, TAIL, PANEL, PWR SEAT,
SUNROOF
7 EPS 60 A Electric power steering

397
4-3. Do-it-yourself maintenance
4
Maintenance and care
14 POWER
30 A Power windows
15 SEAT HTR 15 A Seat heater
16 HTR-IG 10 A Air conditioning system
17 WIPER 25 A Windshield wipers
18 WASHER 15 A Windshield washer
19 ECU-IG NO. 1 10 A Automatic transmission, main body
ECU, electric power steering, elec-
tric cooling fan(s), shift lock control
system, anti-lock brake system, tire
pressure warning system, vehicle
stability control system, cruise con-
trol system
20 ECU-IG NO. 2 10 A Back-up lights, charging system,
rear window defogger, air condi-
tioning system, multiport fuel injec-
tion system/sequential multiport
fuel injection system, moon roof
21 OBD 7.5 A On-board diagnosis system
22 STOP 10 AStop lights, high mounted stop-
light, anti-lock brake system, main
body ECU, multiport fuel injection
system/sequential multiport fuel
injection system, shift lock control
system, vehicle stability control
system
23 DOOR 25 A Power door lock system
24 ACC-B 25 A CIG, ACC
25 FR FOG 15 A Front fog lights
26 AM1 7.5 A Starting system, ACC, CIG
FuseAmpereCircuit

456
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.STEP 1
STEP 2
STEP 3
STEP 5 STEP 4

471
6-1. Specifications
6
Vehicle specifications
Cooling system
Ignition system
Capacity
(Reference)
1.8 L 4-cylinder (2ZR-FE) engine
5.8 qt. (5.5 L, 4.8 Imp. qt.) 2.4 L 4-cylinder (2AZ-FE) engine
6.0 qt. (5.7 L, 5.0 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.
Spark plug
Make
Gap 1.8 L 4-cylinder (2ZR-FE) engine
DENSO SC20HR11 2.4 L 4-cylinder (2AZ-FE) engine
DENSO SK20R11
NGK IFR6A11
0.043 in. (1.1 mm)
NOTICE
■ Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust spark plug gap.

516 Alphabetical index
Child safetyAirbag precautions ..................93
Battery precautions ....... 365, 454
Child restraint system............ 103
Child-protectors .......................42
How your child should wear
the seat belt ..........................62
Installing child restraints ........ 107
Moon roof precautions ............76
Power window lock switch.......71
Power window precautions .....72
Removed key battery
precautions ......................... 388
Seat belt comfort guide ........... 59
Seat belt extender
precautions ...........................65
Seat belt precautions ..............64
Seat heater precautions ........ 326
Trunk precautions ...................49
Child-protectors .........................42
Cleaning
Exterior .................................. 334
Interior ................................... 336
Seat belts .............................. 337
Clock ......................................... 322
Compass ................................... 329
Condenser ................................ 361
Console box ............................. 312
Cooling system Engine overheating ............... 456
Cruise control........................... 169
Cup holder ................................ 314
Curtain shield airbags ...............86
Customizable features............. 491 Daytime running light
system .................................... 162
Defogger Rear window ......................... 219
Side mirror ............................ 219
Dimension ................................ 464
Dinghy towing ................... 201,202
Display Trip information ..................... 156
Do-it-yourself maintenance .... 345
Doors Door lock ..................... 25, 36, 41
Door windows ......................... 71
Side mirrors............................. 69
Driver's seat belt reminder light ......................................... 422
Driving
Break-in tips .......................... 123
Correct posture ....................... 84
Procedures............................ 120
Winter driving tips ................. 181D