2020 TOYOTA HILUX cooling

5727-3. Do-it-yourself maintenance
HILUX_OM_OM0K321E_(EE)
Diesel engine (vehicles with water-cooled intercooler)
Engine coolant reservoir
( P. 576)
Engine oil filler cap ( P. 574)
Engine oil level dipstick
( P. 573)
AdBlue™ tank cap ( P. 585)
Fuel filter ( P. 583, 682)
Fuse box ( P. 602)
Battery ( P. 578)
Washer fluid tank ( P. 582)
Intercooler coolant reservoir
( P. 576)
Intercooler cooling radiator
( P. 577)
Radiator ( P. 577)
Condenser (if equipped)
( P. 577)
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5777-3. Do-it-yourself maintenance
HILUX_OM_OM0K321E_(EE)
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Maintenance and care
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir cap, intercooler
coolant reservoir cap (if equipped), drain cock and water pump. If you cannot
find a leak, have any authorized Toyota retailer or Toyota authorized repairer,
or any reliable repairer test the cap and check for leaks in the cooling system.
Check the radiator, condenser and Intercooler coolant radiator/inter-
cooler and clear away any foreign objects. If any of the above parts is
extremely dirty or you are not sure of their condition, have your vehi-
cle inspected by any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
WARNING
■ When the engine is hot
Do not remove the radiator cap (if equipped), the engine coolant reservoir
cap or intercooler coolant reservoir cap (if equipped).
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 straight 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.
■ Notice on coolant quality
Do not use improper coolant. If improper coolant is used, the engine cooling
system may be damaged.
Radiator, condenser and Intercooler coolant radiator/intercooler
(if equipped)
WARNING
■ When the engine is hot
Do not touch the radiator, condenser or Intercooler coolant radiator/inter-
cooler as they may be hot and cause serious injuries, such as burns.

6468-2. Steps to take in an emergency
HILUX_OM_OM0K321E_(EE)
■ If “DIFFERENTIAL OIL TEMP HIGH SHIFT TO 2WD MODE COOLING TIME
REQUIRED”/“Differential oil temp high Shift to 2WD mode Cooling time
required” or “DIFFERENTIAL OIL TEMP HIGH COOLING TIME
REQUIRED”/“Differential oil temp high Cooling time required” is shown
on the multi-information display
The differential oil temperature is too high.
Turn the front-wheel drive control switch to H2, and reduce the vehicle speed
or stop the vehicle in a safe place. ( P. 398)
■ If “ENGINE OIL LEVEL LOW ADD OR REPLACE”/“Engine oil level low
Add or replace” is shown on the multi-information display
The engine oil level is low. (This warning message may be displayed if the
vehicle is stopped on a slope. Move to a level surface and check to see if the
message goes off.)
Check the level of the engine oil and add or replace oil if necessary.
( P. 563)
■ If “POWER TURNED OFF TO SAVE BATTERY”/“Power turned off to save
battery” is shown on the multi-information display
Power was turned off due to the automatic power off function.
Next time when starting the engine, increase the engine speed slightly and
maintain that level for approximately 5 minutes to recharge the battery.
■ If “DPF FULL MANUAL REGENERATION REQUIRED SEE OWNER’S
MANUAL”/“DPF full Manual regeneration required See owner’s manual”
is shown on the multi-information display
The deposit collected in the filter needs to be regenerated.
 P. 433
■ If “Front Camera Unavailable” or “Front Camera Temporarily Unavailable
See Owner’s Manual” is shown on the multi-information display
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 337, 634)
● PCS (Pre-Collision System)
● LDA (Lane Departure Alert with Yaw Assist Function)
● RSA (Road Sign Assist)
● Dynamic radar cruise control
■ If a message that indicates the need for the shift lever operation is
shown on the multi-information display
To prevent the shift lever from being operated incorrectly or the vehicle from
moving unexpectedly, a message that requires shifting the shift lever may be
shown on the multi-information display. In that case, follow the instruction of
the message and shift the shift lever.

6778-2. Steps to take in an emergency
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When trouble arises
WARNING
■When exchanging the battery
● When the vent plug and indicator are close to the hold down bracket, the
battery fluid (sulfuric acid) may leak.
● For information regarding battery replacement, contact any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer.
■ To prevent damage to the vehicle (vehicles with manual transmission)
Do not pull- or push-start the vehicle as the three-way catalytic converter or
catalytic converter may overheat and become a fire hazard.
NOTICE
■ When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-
gled in the cooling fan or belt.

6788-2. Steps to take in an emergency
HILUX_OM_OM0K321E_(EE)
If your vehicle overheats
●The needle of the engine coolant temperature gauge (P. 142)
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 sufficiently, inspect the hoses and
radiator core (radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant
leaks, immediately contact any
authorized Toyota retailer or
Toyota authorized repairer, or
any reliable repairer.
The following may indicate that your vehicle is overheating.
Correction procedures
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6818-2. Steps to take in an emergency
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When trouble arises
Start the engine to check that the radiator cooling fan operates and
to check for coolant leaks from the radiator or hoses.
If the fan is not operating:
Stop the engine immediately and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
If the fan is operating:
Have the vehicle inspected at the nearest authorized Toyota retailer
or Toyota authorized repairer, or any reliable repairer.
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 fans 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 (if equipped), the engine coolant reservoir
cap or intercooler coolant reservoir cap (if equipped) 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 additive.
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7069-1. Specifications
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*1: EURO IV, V and VI are emission standards. If it is not clear that your vehi-
cle meets relevant standards, contact any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
*2: Without power heater
*3: With power heater
*4: Without water-cooled intercooler
*5: With water-cooled intercooler
Cooling system
Engine
coolant
capacity
Gasoline engine
With automatic transmission
8.1 L (8.6 qt., 7.1 Imp.qt.)
With manual transmission
7.8 L (8.2 qt., 6.9 Imp.qt.)
Diesel
engine
Except for
EURO IV,
V and VI
models*1
8.3 L (8.8 qt., 7.3 Imp.qt.)*2
8.7 L (9.2 qt., 7.7 Imp.qt.)*3
For
EURO IV
models*1
8.6 L (9.1 qt., 7.6 Imp.qt.)*2
8.9 L (9.4 qt., 7.8 Imp.qt.)*3
For
EURO V
and VI
models*1
With automatic transmission
9.6 L (10.1 qt., 8.4 Imp.qt.)*4
9.9 L (10.5 qt., 8.7 Imp.qt.)*5
With manual transmission
8.7 L (9.2 qt., 7.7 Imp.qt.)*2
9.1 L (9.6 qt., 8.0 Imp.qt.)*3, 4
9.4 L (9.9 qt., 8.3 Imp.qt.)*3, 5
Intercooler coolant capacity (if
equipped)2.95 L (3.12 qt., 2.60 Imp.qt.)
Coolant type
Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene gly-
col-based non-silicate, non-amine,
non-nitrite, and non-borate coolant
with long-life hybrid organic acid
technology
Do not use plain water alone.

734Alphabetical index
HILUX_OM_OM0K321E_(EE)
Child safety ................................ 66
Airbag precautions .................. 49
Battery precautions ....... 581, 676
Child restraint system ............. 67
How your child should
wear the seat belt ................. 44
Installing child restraints.... 92, 95
Power window lock
switch.................................. 249
Power window precautions ... 251
Rear door child-protectors .... 191
Removed key battery
precautions ......................... 601
Seat belt precautions .............. 46
Seat heater precautions ........ 535
Child-protectors ....................... 191
Cleaning............................ 556, 560
Aluminum wheels .................. 557
Exterior.................................. 556
Interior ................................... 560
Seat belts .............................. 561
Clock ......................................... 549
Clutch........................................ 709
Coat hooks ............................... 553
Condenser ................................ 577
Console box ............................. 541
Cooling system
Engine overheating ............... 678
Cruise control
Cruise control ........................ 383
Dynamic radar cruise
control................................. 367
Cup holders .............................. 542
Curtain shield airbags ............... 47
DAC ........................................... 430
Daytime running light
system .................................... 312
Deck hooks .............................. 547
Defogger
Outside rear view
mirrors ........................ 519, 528
Rear window ................. 519, 528
Windshield .................... 519, 528
Differential
Oil ......................................... 709
Dimension ................................ 686
Display
Cruise control........................ 383
Dynamic radar cruise
control................................. 367
LDA (Lane Departure
Alert with Yaw Assist
Function) ............................ 362
Multi-information
display ........................ 147, 151
Trip information ............. 148, 153
Do-it-yourself maintenance .... 566
Doors
Door glasses ......................... 248
Door lock............................... 188
Open door warning light........ 638
Outside rear view mirrors...... 245
Rear door child-protectors .... 191
Side doors............................. 188
Downhill assist control
system .................................... 430
DPF (Diesel Particulate Filter)
system .................................... 433
Warning light ......................... 637
Warning message ................. 646
Driver’s seat belt
reminder light ........................ 638
D