2023 TOYOTA SEQUOIA HYBRID radiator cap

4656-3. Do-it-yourself maintenance
Owners Manual_USA_M0C043_en
6
Maintenance and care
Fuse boxes ( P.495)
Power control unit coolant reservoir ( P.468)
Intercooler coolant reservoir ( P.468)
Engine coolant reservoir ( P.468)
Engine oil filler cap ( P.466)
Engine oil level dipstick ( P.466)
Brake fluid reservoir ( P.469)
Engine radiator ( P.469)
Condenser ( P.469)
Electric cooling fans
Radiator cooling fan ( P.468)
Washer fluid tank ( P.470)
Intercooler radiators ( P.468)
Engine compar tment
Components

4696-3. Do-it-yourself maintenance
Owners Manual_USA_M0C043_en
6
Maintenance and care
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL”
line. ( P.543)
■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% deionized water.
(Minimum temperature: -31°F [-
35°C])
Canada: “Toyota Super Long Life
Coolant” is a mixture of 55% coolant
and 45% deionized water.
(Minimum temperature: -44°F [-
42°C])
For more details about coolant, con-
tact your Toyota dealer.
■If the coolant level drops within
a short time of replenishing
Visually check the radiator, hoses,
engine coolant reser voir cap, inter-
coolant reservoir cap, 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 sys-
tem.
Check the radiator, condenser
and intercooler radiators and
clear away any foreign objects.
If either of the above parts is
extremely dirty or you are not
sure of their condition, have
your vehicle inspected by your
Toyota dealer.
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
WARNING
■When the hybrid system is
hot
Do not remove the coolant reser-
voir cap.
The cooling system may be under
pressure and may spray hot cool-
ant 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.
Checking the radiator,
condenser and inter-
cooler radiators
WARNING
■When the hybrid system is
hot
Do not touch the radiator, con-
denser or intercooler radiators or
condenser as they may be hot
and cause serious injuries, such
as burns.
Checking and adding the
brake fluid

5457-2. Steps to take in an emergency
Owners Manual_USA_M0C043_en
7
When trouble arises
6 Start the hybrid system to
check that the radiator cool-
ing fan operates and to check
for coolant leaks from the
radiator or hoses.
7 If the fan is not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
8 Check if “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual”
is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact
your Toyota dealer.
If the message is not displayed:
Have the vehicle i nspected at the
nearest Toyota dealer.
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions.
Failure to do so may result in seri-
ous injury such as burns.
●If steam is seen coming from
under the hood, do not open the
hood until the steam has sub-
sided. The engine compart-
ment may be very hot.
●After the hybrid system has
been turned off , check that the
“READY” indicator is off. When
the hybrid system is operating,
the gasoline engine may auto-
matically start, or the cooling fan
may suddenly operate even if
the gasoline engine stops. Do
not touch or approach rotating
parts such as the fan, which
may lead to fingers or clothing
(especially a tie, a scarf or a
muffler) getting caught, resulting
in serious injury.
●Do not loosen the coolant reser-
voir caps, while the hybrid sys-
tem and radiator are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When adding coolant
Add coolant slowly after the
hybrid system has cooled down
sufficiently. Adding cool coolant to
a hot hybrid system too quickly
can cause damage to the hybrid
system.
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust, etc.).
●Do not use any coolant additive.

Owners Manual_USA_M0C043_en
Alphabetical Index609
Power windowsDoor lock linked window opera-tion ..................................... 175
Jam protection function ........ 174
Operation ............................. 174
Window lock switch .............. 176
Pre-Collision System (PCS)... 249 Enabling/disabling the system........................................... 253
Function ............................... 249
Warning light ........................ 511
R
Radar cruise control (dynamic radar cruise control with full-
speed range) ......................... 275
Radiator ................................... 469
RCTA (Rear Cross Traffic Alert) ............................................... 301Enabling/disabling the system ........................................... 302
Warning lights....................... 513
Warning message ................ 302
Rear automatic air conditioning system ................................... 413
Rear Cross Traffic Alert (RCTA) ............................................... 301Enabling/disabling the system ........................................... 302
Warning lights....................... 513
Warning message ................ 302
Rear differential lock system 372
Rear door sunshades ............ 440
Rear heater system ................ 413 Rear seats ...............................145
Cleaning ...............................453
Head restraints .....................155
Seat heaters ....... ..................415
Seat ventilators.....................415
Rear turn signal lights............221 Replacing light bulbs ............498
Turn signal lever ...................221
Rear view mirror Digital Rear-view Mirror ........160
Inside rear view mirror ..........159
Outside rear view mirrors .....170
Rear window defogger ...........408
Rear window wiper .................239
Refueling ............ .....................241
Capacity ...............................550
Fuel types .............................550
Opening the fuel tank cap ....241
When the fuel door cannot be opened ...............................534
Regenerative braking ...............76 Warning lights .......................509
Replacing Electronic key battery ...........493
Fuses....................................495
Light bulbs ............................498
Road accident cautions ...........79
Road Sign Assist ....................272
Roof luggage carrier ..............196
Roof rack .................................196
Roof rails .................................196
RSA (Road Sign Assist) .........272