cooling TOYOTA COROLLA CROSS HYBRID 2023 User Guide

3806-3. Do-it-yourself maintenance
1Turn the power switch off.
2 Remove the air intake vent
cover.
Pull the cover as shown in
the illustration to disengage
the 5 claws, starting from the
claw in the upper right corner.
Pull the cover toward the
front of the vehicle to remove
it.
3 Remove the filter from the air
intake vent cover.
If dust has accumula ted on the air
intake vent cover, remove the dust
with a vacuum cleaner, etc.
Disengage the claws as
shown in the illustration.
Remove the filter from the
cover.
4 Remove the dust and sand
from the filter.
Using a vacuum cleaner, etc.,
absorb dust and sand from the filter
by profiling the nozzle lightly along
fold.
5Hold the filter to the light and
check if it is not clogged.
If the dust or sand cannot be
removed completely, contact your
NOTICE
■If “Maintenance required for
Traction Battery cooling parts
See owner’s manual” is dis-
played on the multi-informa-
tion display
Clean the air intake vent immedi-
ately.
If the vehicle is continuously
driven with the warning message
displayed, it may cause a mal-
function or output restriction of the
hybrid battery (tr action battery).
Cleaning procedure

3816-3. Do-it-yourself maintenance
6
Maintenance and care
Toyota dealer.
6Install the filter in its original
position, and then install the
air intake vent cover.
If “Maintenance required for
Traction battery cooling parts
See owner’s manual” was dis-
played on the multi-informa-
tion display
7 Start the hybrid system and
check that the warning mes-
sage is no longer displayed.
It may be necessary to drive the
vehicle for warning message is dis-
played again then disappears.
If the warning message does not
disappear after some time, have
the vehicle inspected by your Toy-
ota dealer.
■If the duct or sand on the filter
cannot be removed
It is recommended to use a vacuum
cleaner with plastic brushes.
WARNING
■When cleaning the air intake
vent
●Do not use water or other liq-
uids to clean the air intake vent.
If water is applied to the hybrid
battery (traction battery) or
other components, a malfunc-
tion or fire may occur.
●Before cleaning the air intake
vent, make sure to turn the
power switch off to stop the
hybrid system.
●Do not put a han d or leg in the
air intake vent. If it is caught in a
cooling fan, or if it touches a
high voltage part that results in
an electric shock, death or seri-
ous injuries may result.
NOTICE
■When cleaning the air intake
vent
Do not use an ai r blow gun, etc.
Dust may be blown out, possibly
causing a malfunction or output
restriction of the hybrid battery
(traction battery).
■To prevent damage to the
vehicle
Observe the following precau-
tions:
●Do not allow liquid or foreign
material to enter the air intake
vent.
●Make sure to reinstall the filter
and cover to their original posi-
tions after cleaning.
●Do not install anything to the air
intake vent other than the exclu-
sive filter for this vehicle or use
the vehicle witho ut the filter
installed.

4167-2. Steps to take in an emergency
reset the message after the mainte-
nance is performed. ( P.444)
*: Refer to the separate “Scheduled
Maintenance” or “Owner’s Man-
ual Supplement” for the mainte-
nance interval applicable to your
vehicle.
■If a message that indicates the
need for referring to Owner’s
Manual is displayed
●If “Engine Coolant Temp High” is
displayed, follow the instructions
accordingly. ( P.438)
●If any of the following messages
are displayed on the multi-infor-
mation display, it may indicate a
malfunction. Have the vehicle
inspected by you r Toyota dealer
immediately.
• “Smart Key System malfunction”
• “Hybrid System Malfunction”
• “Check Engine”
• “Hybrid Battery System Malfunc- tion”
• “Accelerator System Malfunction”
●If any of the following messages
are displayed on the multi-infor-
mation display, it may indicate a
malfunction. Immediately stop the
vehicle and contact your Toyota
dealer.
• “Braking Power Low”
• “Charging System Malfunction”
• “Oil Pressure Low”
●If any of the following messages
are shown on the multi-informa-
tion display, the vehicle may have
run out of fuel. Stop the vehicle in
a safe place and, if the fuel level is
low, refuel the vehicle. ( P. 7 1 )
• “Hybrid System Stopped”
• “Engine Stopped”
●If “Maintenance Required for Trac-
tion Battery Cooling Parts See
Owner's Manual” is shown, the fil-
ters may be clogged, the air intake
vent may be blocked, or there may
be a gap in the duct. Therefore,
perform the following correction
procedure. • Cleaning the hybrid battery (trac-
tion battery) air intake vents.
( P.379)
If the warning message is shown
even if the vents are cleaned,
have the vehicle inspected by
your Toyota dealer.
NOTICE
■If “High Power Consumption
Power to Climate Temporar-
ily Limited” is displayed fre-
quently
There is a possible malfunction
relating to the charging system or
the 12-volt battery may be deteri-
orating. Have the vehicle
inspected by you r Toyota dealer.

4377-2. Steps to take in an emergency
7
When trouble arises
WARNING
●Do not smoke, use matches,
cigarette lighters or allow open
flame near the 12-volt battery.
■12-volt battery precautions
The 12-volt battery contains poi-
sonous and corrosi ve acidic elec-
trolyte, while related parts contain
lead and lead compounds.
Observe the following precautions
when handling the 12-volt battery:
●When working with the 12-volt
battery, always wear safety
glasses and take care not to
allow any battery fluids (acid) to
come into contact with skin,
clothing or the vehicle body.
●Do not lean over the 12-volt bat-
tery.
●In the event that battery fluid
comes into contact with the skin
or eyes, immediately wash the
affected area with water and
seek medical attention. Place a
wet sponge or cloth over the
affected area until medical
attention can be received.
●Always wash your hands after
handling the 12-volt battery sup-
port, terminals, and other bat-
tery-related parts.
●Do not allow child ren near the
12-volt battery.
■After recharging the 12-volt
battery
Have the 12-volt battery
inspected at your Toyota dealer
as soon as possible.
If the 12-volt battery is deteriorat-
ing, continued use may cause the
12-volt battery to emit a malodor-
ous gas, which may be detrimen-
tal to the health of passengers.
■When replacing the 12-volt
battery
●When the vent plug are close to
the hold down clamp, the bat-
tery fluid (sulfuric acid) may
leak.
●For information regarding
12-volt battery replacement,
contact your Toyota dealer.
●After replacing, s ecurely attach
the exhaust hose and exhaust
hole plug to the exhaust hole of
the replaced 12-volt battery. If
not properly installed, gases
(hydrogen) may leak into the
vehicle interior, and there is the
possible danger of the gas ignit-
ing and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper
cables, ensure that they do not
become entangled in the cooling
fans, etc.
■When connecting jumper
cables
Make sure to connect jumper
cables to the specified terminals
and connecting point. Failure to
do so may adversely affect the
electronic devices or damage to
them.
■To prevent damaging the
vehicle
The exclusive jump starting termi-
nal is to be used when charging
the 12-volt battery from another
vehicle in an emergency. It cannot
be used to jump start another
vehicle.

4387-2. Steps to take in an emergency
If the engine coolant tempera-
ture gauge enters the red
zone or “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual”
is shown on the multi-informa-
tion display
1 Stop the vehicle in a safe
place and turn off the air con-
ditioning system, and then
stop the hybrid system.
2 If you see steam: Carefully lift
the hood after the steam sub- sides.
If you do not see steam:
Carefully lift the hood.
3 After the hybrid system has
cooled down, inspect the
hoses and radiator core (radi-
ator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
4The coolant level is satisfac-
tory if it is between the “MAX”
and “MIN” lines on the reser-
voir.
Reservoir
“MAX” line
“MIN” line
5 Add coolant if necessary.
If your vehicle over-
heats
The following may indicate
that your vehicle is over-
heating.
The engine coolant tem-
perature gauge ( P.84, 87)
is in the red zone or a loss
of hybrid system power is
experienced. (For example,
the vehicle speed does not
increase.)
 “Engine Coolant Temp High
Stop in a Safe Place See
Owner’s Manual” or “Hybrid
system overheated Output
power reduced” is shown on
the multi-information dis-
play.
 Steam comes out from
under the hood.
Correction procedures

4397-2. Steps to take in an emergency
7
When trouble arises
Water can be used in an emer-
gency if coolant is unavailable.
If water was added in an emer-
gency, have the vehicle inspected
at your Toyota dealer as soon as
possible.
6Start the hybrid system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling fans operate and
to check for coolant leaks
from the radiator or hoses.
The fans operate w hen the air con-
ditioning system is turned on imme-
diately after a cold start. Confirm
that the fans are operating by
checking the fan sound and air flow.
If it is difficult to check these, turn
the air conditioning system on and
off repeatedly. (The fans may not
operate in freezing temperatures.)
7 If the fans are not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fans are operating:
Have the vehicle inspected at
the nearest Toyota dealer.
If “Hybrid system overheated
Output power reduced” is
shown on the multi-informa-
tion display
1 Stop the vehicle in a safe
place. 2
Stop the hybrid system and
carefully lift the hood.
3 After the hybrid system has
cooled down, inspect the
hoses and radiator core (radi-
ator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
4The coolant level is satisfac-
tory if it is between the “F”
and “L” lines on the reservoir.
Reservoir
“F” line
“L” line
5 Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
If water was added in an emer-

4407-2. Steps to take in an emergency
gency, have the vehicle inspected
at your Toyota dealer as soon as
possible.
6After stopping the hybrid sys-
tem and waiting for 5 minutes
or more, start the hybrid sys-
tem again and check for the
multi-information display.
If the message does not dis-
appear: Stop the hybrid sys-
tem and contact your Toyota
dealer.
If the message is not dis-
played: The hybrid system
temperature has dropped
and the vehicle may be
driven normally.
However, if the message appears
again frequently, contact your Toy-
ota dealer.
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions. 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 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
fans 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 engine/power
control unit 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.

4478-1. Specifications
8
Vehicle specifications
SAE 0W-16 is the best choice
for good fuel economy and good
starting in cold weather.
If SAE 0W-16 is not available,
SAE 0W-20 oil may be used.
However, it must be replaced
with SAE 0W-16 at the next oil
change.
Oil viscosity (0W-16 is explained
here as an example):
• The 0W in 0W-16 indicates the characteristic of the oil
which allows cold startability.
Oils with a lower value before
the W allow for easier starting
of the engine in cold weather.
• The 16 in 0W-16 indicates the viscosity characteristic of the
oil when the oil is at high tem- perature. An oil with a higher
viscosity (one with a higher
value) may be better suited if
the vehicle is operated at high
speeds, or under extreme
load conditions.
How to read oil container label:
API registered mark is added to
some oil containers to help you
select the oil you should use.
Cooling system
Capacity
(Refer-
ence)Gasoline
engine6.4 qt. (6.1 L, 5.4 Imp. qt.)
Power con-
trol unit1.8 qt. (1.7 L, 1.5 Imp. qt.)
Coolant type
Use either o f the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality et hylene glycol-based
non-silicate, non -amine, non-nitrite, and
non-borate coolant with long-life hybrid organic
acid technology
Do not use pla in water alone.
Ignition system (spark plug)
MakeDENSO FC16HR-Q8
Gap0.031 in. (0.8 mm)

490Alphabetical Index
Preparing and checking before
winter.................................. 291
Battery (traction battery) ......... 71
Blind Spot Monitor (BSM) ...... 252
Bottle holders ......................... 311
Brake Brake hold ............................ 189
Fluid ............................. 354, 449
Parking brake ....................... 186
Regenerative braking ............. 69
Warning light ........................ 402
Brake assist ............................ 284
Break-in tips ........ ................... 154
Brightness control Instrument panel light control86, 89
BSM (Blind Spot Monitor) ...... 252
C
Care Exterior ................................. 334
Interior .................................. 337
Seat belts ............................. 337
Wheels and wheel ornaments........................................... 334
Cargo capacity ....................... 163
Cargo hooks ........................... 313
Child restraint system Fixed with a LATCH system ... 56
Fixed with a seat belt ............. 52
Front passenger occupant clas-sification system ................... 37
Points to remember ................ 43
Riding with children ................ 42
Types of child restraint system installation met hod ............... 45
Using an anchor bracket ........ 61
Child safety 12-volt battery precautions . 357, 437
Airbag precautions ................. 32
Back door precautions ......... 119 Child restraint system .............45
Heated steering wheel and seat
heater precautio ns..............306
How your child should wear the seat belt ................................26
Moon roof precautions..........147
Power window lock switch ....145
Power window precautions...144
Rear door child-protectors .... 118
Removed electronic key battery precautions .........................383
Seat belt extender precautions .............................................26
Seat belt precautions..............42
Child-protectors...................... 118
Cleaning Exterior .................................334
Interior ..................................337
Seat belts .............................337
Wheels and wheel ornaments...........................................334
Clock ................... .....84, 86, 87, 90
Coat hooks ..............................325
Condenser ............. ..................353
Console box ............................312
Cooling system .......................352 Engine overheating ..............438
Hybrid system overheating ...439
Cruise control .........................246
Cup holders............................. 311
Current fuel consumption..92, 99
Curtain shield airbags ..............29
Customizable featu res ...........463
D
Daytime running light system192
Daytime running lights/parking
lightsReplacing light bulbs ............388
Defogger Outside rear view mirrors .....301
Rear window.........................301