2023 TOYOTA HILUX cooling

5788-2. Steps to take in an emergency
HILUX_OM_OM0K789E_(EE)
■ If “Oil maintenance required soon” is shown
The engine oil is scheduled to be changed.
Check the engine oil, and change if necessary. After changing the engine oil,
the oil change system should be reset. ( P. 491)
For Russia, Armenia, Ukraine, Byelarus, Moldova, Bosnia Herzegovina, Mon-
tenegro, Serbia and Macedonia: You have forgotten to reset the oil change
system. Change the engine oil in accordance with the maintenance schedule.
■ If “Oil maintenance required” is shown
The engine oil is scheduled to be changed.
Check and change the engine oil, and oil filter by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer. After changing
the engine oil, the oil change system should be reset. ( P. 491)
For Russia, Armenia, Ukraine, Byelarus, Moldova, Bosnia Herzegovina, Mon-
tenegro, Serbia and Macedonia: You have forgotten to reset the oil change
system. Change the engine oil in accordance with the maintenance schedule.
■ If “Differential oil temp high Shift to 2WD mode Cooling time required” or
“Differential oil temp high Co oling time required” is shown
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. 330)
■ If “Engine oil level low Add or replace” is shown
The engine oil level is low. (This warning message may be displayed if the
vehicle is stopped on a slope. Move the vehicle 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. 479)
■ If “Power turned off to save battery” is shown
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” is shown
The deposit collected in the filter needs to be regenerated. ( P. 370)
■ If “DPF regeneration in progress” is shown
Regeneration is being automatically carried out by the DPF system.
( P. 369)

6098-2. Steps to take in an emergency
HILUX_OM_OM0K789E_(EE)
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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.

6108-2. Steps to take in an emergency
HILUX_OM_OM0K789E_(EE)
If your vehicle overheats
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.
● The needle of the engine coolant temperature gauge (P. 128)
enters the red zone or a loss of engine power is experienced.
(For example, the vehicle speed does not increase.)
● Vehicles with multi-information display: “Engine Coolant Temp
High Stop in a Safe Place See Owner’s Manual” is shown on the
multi-information display.
● Steam comes out from under the hood.
Correction procedures
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6138-2. Steps to take in an emergency
HILUX_OM_OM0K789E_(EE)
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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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6349-1. Specifications
HILUX_OM_OM0K789E_(EE)
*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
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
8.2 L (8.7 qt., 7.2 Imp.qt.)*2
8.6 L (9.1 qt., 7.6 Imp.qt.)*3
For
EURO IV,
V and VI
models*1
With automatic transmission
9.8 L (10.4 qt., 8.6 Imp.qt.)
With manual transmission
8.7 L (9.2 qt., 7.7 Imp.qt.)*2
9.3 L (9.8 qt., 8.2 Imp.qt.)*3
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.

664Alphabetical index
HILUX_OM_OM0K789E_(EE)
Child safety ................................ 64
Airbag precautions .................. 47
Battery precautions ....... 497, 608
Child restraint system ............. 65
How your child should
wear the seat belt ................. 42
Installing child restraints.... 88, 91
Power window lock
switch.................................. 184
Power window precautions ... 186
Rear door child-protectors .... 154
Removed key battery
precautions ......................... 518
Seat belt precautions .............. 44
Seat heater precautions ........ 450
Child-protectors ....................... 154
Cleaning............................ 472, 476
Exterior.................................. 472
Interior ................................... 476
Seat belts .............................. 477
Wheels .................................. 473
Clock ......................................... 465
Clutch........................................ 638
Coat hooks ............................... 469
Condenser ................................ 493
Console box ............................. 457
Cooling system
Engine overheating ............... 610
Cruise control
Cruise control ........................ 316
Dynamic radar cruise
control................................. 300
Cup holders .............................. 458
Curtain shield airbags ............... 45
DAC ........................................... 363
Daytime running light
system .................................... 251
Deck hooks .............................. 463
Defogger
Outside rear view
mirrors ........................ 435, 444
Rear window ................. 435, 444
Windshield .................... 435, 443
Differential
Oil ......................................... 637
Dimension ................................ 620
Display
Cruise control........................ 316
Dynamic radar cruise
control................................. 300
LDA (Lane Departure
Alert with Yaw Assist
Function) ............................ 289
Multi-information display ....... 133
Trip information ..................... 135
Do-it-yourself maintenance .... 482
Doors
Door glasses ......................... 183
Door lock............................... 151
Open door warning light........ 570
Outside rear view mirrors...... 180
Rear door child-protectors .... 154
Side doors............................. 151
Downhill assist control
system .................................... 363
DPF (Diesel Particulate Filter)
system .................................... 368
Warning message ................. 578
Drive-Start Control .................. 193
Driver’s seat belt
reminder light ........................ 570
D