2012 TOYOTA IQ cooling

5
437 5-2. Steps to take in an emergency
When trouble arises
iQ_WE_74014E
CAUTION
To prevent an accident or injury when inspecting under the hood of
your vehicle
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, caus-
ing serious injuries such as burns.
Keep hands and clothing (especially a tie, a scarf or a muffler) away from
the fan and belts. Failure to do so may cause the hands or clothing to be
caught, resulting in serious injury.
Do not loosen the radiator cap and the coolant reservoir cap while the
engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. 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 commercially available coolant additives.

452 6-1. Specifications
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Cooling system
Ignition system
Capacity
(Reference)
1KR-FE
engineVehicles with a manual transmission
4.3 L (4.5 qt., 3.8 Imp.qt.)
Vehicles with a Multidrive
4.5 L (4.8 qt., 4.0 Imp.qt.)
1NR-FE
engineVehicles with a manual transmission
4.7 L (5.0 qt., 4.1 Imp.qt.)
Vehicles with a Multidrive
4.9 L (5.2 qt., 4.3 Imp.qt.)
Coolant typeUse 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 tech-
nology
Do not use plain water alone.
Spark plug
Make
1KR-FE engine
DENSO SK16HR11
1NR-FE engine
DENSO SC20HR11
Gap 1.1 mm (0.043 in.)
NOTICE
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.

464 Alphabetical index
iQ_WE_74014E
Care
Exterior.................................. 306
Interior ................................... 310
Seat belts .............................. 311
CD player .................................. 265
Chains ....................................... 233
Child restraint system
Baby seats, definition ............ 137
Baby seats, installation ......... 148
Child seats, definition ............ 137
Child seats, installation ......... 148
Installing CRS with ISOFIX
rigid anchors ....................... 154
Installing CRS with
seat belts ............................ 149
Installing CRS with
top straps ............................ 155
Junior seats, definition .......... 137
Junior seats, installation........ 148
Child safety
Airbag precautions ................ 132
Battery precautions ....... 344, 433
Child restraint system ........... 137
How your child should wear
the seat belt .......................... 89
Installing child restraints........ 148
Power window lock switch .... 100
Power window precautions ... 102
Removed key battery
precautions ......................... 360
Seat belt precautions .............. 89
Seat heater precautions ........ 297
Cleaning
Exterior.................................. 306
Interior ................................... 310
Seat belts .............................. 311
Clock ......................................... 209
Condenser ................................ 342Cooling system
Engine overheating ............... 435
CRS ........................................... 137
Cup holders.............................. 289
Curtain shield airbags ............. 124
Customizable features ............ 459
Daytime running light
system .................................... 214
Defogger
Rear window ................. 252, 254
Side mirrors .......................... 254
Dimension ................................ 444
Display
Audio..................................... 257
Trip information ..................... 205
Do-it-yourself maintenance .... 316
Doors
Back door................................ 75
Door glasses ......................... 100
Door lock..................... 39, 62, 73
Side doors............................... 72
Side mirrors ............................ 95
Double locking system ........... 117
Driver’s seat belt reminder
light......................................... 399
Driving
Break-in tips .......................... 167
Correct posture ..................... 122
Procedures ........................... 164
Winter driving tips ................. 231C
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