2018 TOYOTA COROLLA iM radiator cap

2386-3. Do-it-yourself maintenance
COROLLA iM_U (OM12M42U)
Engine compartment
Washer fluid tank (→P. 249)
Engine coolant reservoir (→ P. 242)
Engine oil filler cap (→ P. 240)
Engine oil level dipstick (→ P. 239) Brake fluid reservoir
(→ P. 244)
Battery (→ P. 246)
Fuse box ( →P. 269)
Electric cooling fan
Condenser ( →P. 244)
Radiator ( →P. 244)1
2
3
4
5
6
7
8
9
10

2426-3. Do-it-yourself maintenance
COROLLA iM_U (OM12M42U)
The coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold.Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line. ( →P. 318)
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with
long-life hybrid organic acid technology.
For the U.S.A.: “Toyota Super Long Life Coolant” is a mixture of 50% cool- ant and 50% deionized water. (Minimum temperature: -31 °F
[-35° C])
For Canada: “Toyota Super Long Life Coolant” is a mixture of 55% cool- ant and 45% deionized water. (Minimum temperature: -44 °F
[-42 °C])
For more details about engine coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir caps, 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.
Engine coolant
1
2
3

3207-2. Steps to take in an emergency
COROLLA iM_U (OM12M42U)
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 fan and belts. Failure to do so may cause the hands or clothing to be
caught, resulting in serious injury.
● Do not loosen the coolant reservoir cap while the engine and radiator are
hot.
High temperature steam or coolant could spray out.
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 additives.

380Alphabetical index
COROLLA iM_U (OM12M42U)
Radiator .................................... 244
Rear interior light..................... 205
Rear seatFolding down .......................... 96
Rear turn signal lights............. 139
Replacing light bulbs............. 277
Turn signal lever ................... 139
Wattage ................................ 332
Rear view mirror Inside rear view mirror .......... 103
Outside rear view mirrors...... 104
Rear window defogger ............ 199
Rear window wiper .................. 147
Refueling .................................. 149 Capacity ................................ 326
Fuel types ............................. 326
Opening the fuel tank cap ..... 151
Replacing Fuses .................................... 269
Light bulbs ............................ 272
Tires ...................................... 303
Wireless remote control battery ................................ 267
Reporting safety defects for U.S. owners ...................... 356
Resetting the message indicating maintenance
is required .............................. 227 Seat belt reminder light .......... 293
Seat belts ................................... 26
Adjusting the seat belt ............ 27
Automatic Locking Retractor (ALR) .................... 28
Child restra int system
installation ............................ 59
Cleaning and maintaining
the seat belt........................ 224
Emergency Locking Retractor (ELR) .................................... 28
How to wear your seat belt ..... 26
How your child should wear the seat belt.......................... 28
Pregnant women, proper seat belt use ......................... 29
Reminder light and buzzer.... 293
Seat belt extender .................. 28
Seat belt pretensioners........... 27
SRS warning light ................. 292
Seats ........................................... 95 Adjustment.............................. 95
Adjustment precautions .......... 95
Child seats/child restraint system installation ................ 56
Cleaning ............................... 223
Head restraints ....................... 98
Properly sitting in the seat ...... 24
Sensor Automatic headlight
system .......... ...................... 143
Automatic High Beam system .......... ...................... 155
LDA (Lane Departure Alert)................................... 172
PCS (Pre-Collision
system)......... ...................... 155
RS