2017 TOYOTA 4RUNNER radiator cap

3546-3. Do-it-yourself maintenance
4RUNNER (U)_(OM35B37U)
Engine compartment
Washer fluid tank (→P. 367)
Power steering fluid reservoir (→ P. 363)
Engine oil level dipstick (→ P. 356)
Engine coolant reservoir (→ P. 359)
Engine oil filler cap ( →P. 357) Brake fluid reservoir
(→ P. 361)
Fuse box ( →P. 386)
Battery ( →P. 364)
Condenser ( →P. 360)
Radiator ( →P. 360)1
2
3
4
5
6
7
8
9
10

3596-3. Do-it-yourself maintenance
6
Maintenance and care
4RUNNER (U)_(OM35B37U)
The coolant level is satisfactory if it is between the “F” and “L” lines on
the reservoir when the engine is cold.
Reservoir cap
“F” line
“L” line
If the level is on or below the “L”
line, add coolant up to the “F” line.
(→P. 457)
■ 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.
U.S.A.:
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deion-
ized water. (Minimum temperature: -31 °F [-35 °C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deion-
ized 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

3606-3. Do-it-yourself maintenance
4RUNNER (U)_(OM35B37U)
Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is ex tremely dirty or you are not sure of
their condition, have yo ur vehicle inspected by your Toyota dealer.
CAUTION
■When the engine is hot
Do not remove the engine coolant reservoir cap or the radiator cap.
(→P. 458)
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■ When adding 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 it from damaging parts or paint.
Radiator and condenser
CAUTION
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause seri\
-
ous injuries, such as burns.

4577-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)_(OM35B37U)
●The needle of the engine coolant temperature gauge ( →P. 8 1 )
enters the red zone or a loss of engine power is experienced.
(For example, the vehicle speed 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 fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The coolant level is satisfactory
if it is between the “F” and “L”
lines on the reservoir.
Reservoir
“F” line
“L” line
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

4587-2. Steps to take in an emergency
4RUNNER (U)_(OM35B37U)
Add engine coolant if neces-
sary. (→P. 355)
Water can be used in an emer-
gency if engine coolant is unavail-
able.
Start the engine to check that the radiator cooling fan operate and
to check for coolant leaks fr om the radiator or hoses.
If the fan are not operating:
Stop the engine immediately and contact your Toyota dealer.
If the fan are operating:
Have the vehicle in spected at the nearest Toyota dealer.
5
CAUTION
■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.
6
7
●Do not loosen the radiator cap and the
coolant reservoir cap while the engine
and radiator are hot.
High temperature steam or coolant
could spray out.

523Alphabetical index
4RUNNER (U)_(OM35B37U)
Outer foot lights....................... 297
Outside rear view mirrors ....... 144Adjusting and folding ............ 144
Outside rear view mirror defoggers ......... 284, 290
Outside temperature display .................................... 314
Overhead console ................... 304
Overheating, Engine................ 457
Parking brake ........................... 207 Operation .............................. 207
Parking brake engaged
warning buzzer ................... 417
Parking lights ........................... 208
Light switch ........................... 208
Replacing light bulbs............. 394
Wattage ................................ 473
Pen holder ................................ 305
Personal lights ......................... 298
Power back window ................ 150 Jam protection function......... 152
Operation .............................. 150
Power outlets ................... 315, 320
Power steering
Fluid ...................................... 363
Warning light ......................... 419
Power windows........................ 146
Door lock linked window operation ............... 148
Jam protection function......... 147
Operation .............................. 146
Window lock switch............... 146 Radiator .................................... 360
Rear differential lock
system.................................... 247
Rear seats
Adjustment............................ 123
Folding down ........ 125, 127, 129
Rear step bumper .................... 116
Rear turn signal lights ............ 206
Replacing light bulbs ............ 400
Turn signal lever ................... 206
Wattage ................................ 473
Rear view mirror Inside rear view mirror .......... 142
Outside rear view mirrors ..... 144
Rear view monitor system
*
Rear window ............................ 150
Rear window defoggers....................... 284, 290
Rear window wiper .................. 219
Refueling .................................. 222
Capacity................................ 464
Fuel types ............................. 464
Opening the fuel tank cap..... 224
Replacing Fuses .................................... 386
Key battery ........................... 383
Light bulbs ............................ 389
Tires...................................... 433
Reporting safety defects
for U.S. owners...................... 498
Resetting the message indicating maintenance
is required.............................. 345
Roof luggage carrier ............... 170
P
R
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.