2023 TOYOTA YARIS CROSS cooling

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6-3. Do-it-yourself maintenance
Maintenance and care
remove the filter from cover as
shown in the illustration.
4 Remove the dust and clogs from
the filter using a vacuum
cleaner, etc.
Make sure to also remove the dust and clogs from the inside of the air intake
vent cover.
5 Reinstall the filter to the cover.
1 Engage the filter to the 2 tabs as
shown in the illustration.
2 Engage the 2 claws to install the
filter.
Make sure that the filter is not crooked or deformed when installing it.
6 Install the air intake vent cover.
1 Insert the tab of the cover as
shown in the illustration.
2 Push the cover to engage the 2
claws.
■Scheduled maintenance of the air
intake vent
Refer to “Toyota Service Booklet” or “Toyota Warranty Booklet”.
■Cleaning the air intake vent
●Dust in the air intake vent may inter-fere with the cooling of the hybrid bat-
tery (traction battery). If charging/discharging of the hybrid battery (traction battery) becomes lim-
ited, the distance that the vehicle can be driven using the electric motor (traction motor) may be reduced and
the fuel economy may be reduced. Inspect and clean the air intake vent periodically.
●Improper handling of the air intake vent cover and filter may result in
damage to them. If you have any con- cerns about cleaning the filter, contact any authorized Toyota retailer or
Toyota authorized repairer, or any reli- able repairer.
■If “Maintenance Required for Trac-tion Battery Cooling Parts See
Owner’s Manual” is displayed on the multi-information display
●If this warning message is displayed on the multi-information display, remove the air intake vent cover and

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6-3. Do-it-yourself maintenance
Maintenance and care
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart entry & start system (if equipped) and wireless remote control
will not function properly.
●The operational range will be reduced.
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032 (vehi-
cles without a smart entry & start
system), or CR2450 (vehicles
with a smart entry & start sys-
tem)
■Use a CR2032 (vehicles without a
smart entry & start system) or CR2450 (vehicles with a smart entry & start system) lithium bat-
tery
●Batteries can be purchased at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
NOTICE
●Do not install anything to the air intake vent other than the exclusive
filter for this vehicle or use the vehi- cle without the filter installed.
■If “Maintenance Required for Traction Battery Cooling Parts See Owner’s Manual” is dis-
played on the multi-information display
If the vehicle is continuously driven
with the warning message (indicating that charging/discharging of the hybrid battery [traction battery] may
become limited) displayed, the hybrid battery (traction battery) may mal-function. If the warning message is
displayed, clean the air intake vent immediately.
Wireless remote con-
trol/electronic key bat-
ter y
Replace the battery with a new
one if it is depleted.
As the key may be damaged if
the following procedure is not
performed properly, it is rec-
ommended that key battery
replacement be performed by
any authorized Toyota retailer
or Toyota authorized repairer,
or any reliable repairer.
Items to prepare

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7-2. Steps to take in an emergency
When trouble arises
■If “Radar Cruise Control Unavail-
able” is displayed (if equipped)
The dynamic radar cruise control with full-speed range system cannot be used
temporarily. Use the system when it becomes available again.
■If a message that indicates the need for visiting your Toyota dealer
is displayed
The system or part shown on the multi- information display is malfunctioning.
Have the vehicle inspected by any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer immediately.
■If a message that indicates the need for referring to Owner’s Man-ual is displayed
●If “Engine Coolant Temp High Stop in a Safe Place See Owner’s Manual” is
displayed, follow the instructions accordingly. ( P.477)
●If “Exhaust Filter Full See Owner’s Manual” is displayed, follow the instructions accordingly. ( P.327)
●If “Oil Pressure Low Stop in a Safe Place See Owner’s Manual” is dis-
played, follow the instructions accord- ingly. ( P.383)
●If any of the following messages are displayed on the multi-information dis-play, it may indicate a malfunction.
Have the vehicle inspected by any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer immediately. • “Smart Entry & Start System Malfunc-tion See Owner’s Manual”
• “Hybrid System Malfunction” • “Check Engine”• “Hybrid Battery System Malfunction”
• “Accelerator System Malfunction” • “Hybrid System Stopped”• “Engine Stopped”
●If any of the following messages are displayed on the multi-information dis-
play, it may indicate a malfunction. Immediately stop the vehicle and con-tact any authorized Toyota retailer or
Toyota authorized repairer, or any reli-
able repairer. • “Braking Power Low Visit Your Dealer”• “12-Volt Battery Charging System
Malfunction Visit Your Dealer”
●If “Low Auxiliary Battery See Owner’s
Manual” is shown, • When the display goes off after sev-eral seconds (displays for about 6
seconds): Maintain the hybrid system operation for more than 15 minutes and charge the 12-volt battery.
• When the display does not go off: Start up the hybrid system using the procedures: P. 4 7 2
●If “Maintenance Required for Traction Battery Cooling Parts See Owner’s
Manual” is shown, the filters may be clogged, the air intake vents may be blocked, or there may be a gap in the
duct. Therefore, perform the following correction procedure.• If the air intake vents and filters of the
hybrid battery (traction battery) are dirty, perform the procedure on P.406 to clean them.
• If the warning message is shown when the air intake vents and filters of the hybrid battery (traction battery) are
not dirty, have the vehicle inspected by any authorized Toyota retailer or Toyota authorized repairer, or any reli-
able repairer immediately.
■If “Maintenance Required For Trac- tion Battery At Your Dealer” is dis-played
The hybrid battery (traction battery) is scheduled to be inspected or replaced. Have the vehicle inspected by any
authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer immediately.
●Continuing to drive the vehicle without having the hybrid battery (traction bat-
tery) inspected will cause the hybrid system not to start.
●If the hybrid system does not start, contact any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer immediately.

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7-2. Steps to take in an emergency
WARNING
●Always wash your hands after han- dling the 12-volt battery support,
terminals, and other battery-related parts.
●Do not allow children near the 12-volt battery.
■After recharging the 12-volt bat-tery
Have the 12-volt battery inspected at
any authorized Toyota retailer or Toyota authorized repairer, or any reli-able repairer as soon as possible.
If the 12-volt battery is deteriorating, continued use may cause the 12-volt battery to emit a malodorous gas,
which may be detrimental to the health of passengers.
■When replacing the 12-volt bat-tery
●For information regarding 12-volt
battery replacement, contact any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
●After replacing, securely attach the exhaust hose and exhaust hole plug to the exhaust hole of the
replaced 12-volt battery. If not prop- erly installed, gases (hydrogen) may leak into the vehicle interior,
and there is the possible danger of the gas igniting and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entangled in the cooling fan, etc.
■To prevent damaging the vehicle
The exclusive jump starting terminal
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.

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7-2. Steps to take in an emergency
When trouble arises
If the engine coolant temperature
gauge enters the red zone or
“Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” is shown on the multi-
information display
1 Stop the vehicle in a safe place
and turn off the air conditioning
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: Care-
fully lift the hood.
3 After the hybrid system 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.
4 The coolant level is satisfactory
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 emergency if
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The engine coolant tempera-
ture gauge ( P.95, 100) 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 display.
 Steam comes out from under
the hood.
Correction procedures

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7-2. Steps to take in an emergency
coolant is unavailable.
6 Start the hybrid system and turn
the air conditioning system on to
check that the radiator cooling
fan operates and to check for
coolant leaks from the radiator
or hoses.
The fan operates when the air condi- tioning system is turned on immediately
after a cold start. Confirm that the fan is 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 fan may not operate in freezing temperatures.)
7 If the fan is not operating: Stop
the hybrid system immediately
and contact any authorized
Toyota retailer or Toyota autho-
rized repairer, or any reliable
repairer.
If the fan is operating: Have the
vehicle inspected at the nearest
any authorized Toyota retailer or
Toyota authorized repairer, or
any reliable repairer.
If “Hybrid System Overheated
Output Power Reduced” is
shown on the multi-information
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 (radiator) for
any leaks.
If a large amount of coolant leaks, immediately contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact any authorized
Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
4 The coolant level is satisfactory
if it is between the “F” or “L”
lines on the reservoir.
Reservoir

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7-2. Steps to take in an emergency
When trouble arises
“F” line
“L” line
5 Add coolant if necessary.
If water was added in an emergency, have the vehicle inspected at any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer as soon as possible.
6 After stopping the hybrid system
and waiting for 5 minutes or
more, start the hybrid system
again and check for the multi-
information display.
If the message does not disap-
pear: Stop the hybrid system
and contact any authorized
Toyota retailer or Toyota autho-
rized repairer, or any reliable
repairer.
If the message is not displayed:
The hybrid system temperature
has dropped and the vehicle
may be driven normally.
However, if the message appears again
frequently, contact any 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.
●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 automatically start, or
the cooling fan may suddenly oper- ate even if the gasoline engine stops. Do not touch or approach
rotating parts such as the fan, which may lead to fingers or cloth-ing (especially a tie, a scarf or a
muffler) getting caught, resulting in serious injury.
●Do not loosen the coolant reservoir caps while the hybrid system and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power con-trol 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 dam- age to the hybrid system.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or
dust etc.).

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8-1. Specifications
operated at high speeds, or
under extreme load conditions.
How to read oil container labels:
Either or both API registered marks
are added to some oil containers to
help you select the oil you should
use.
JASO GLV-1 Mark
API Service Symbol
Top portion: “API SERVICE SP” means
the oil quality designation by American
Petroleum Institute (API).
Center portion: “SAE 0W-16” means
the SAE viscosity grade.
Lower portion: “Resource-Conserving”
means that the oil has fuel-saving and
environmental protection capabilities.
ILSAC Certification Mark
The International Lubricant Specifica-
tion Advisory Committee (ILSAC) Certi-
f ic at i o n M ar k i s d is pl a ye d on t h e f r o nt o f
the container.
Cooling system
Capacity
(Reference)
Gasoline
engine4.7 L (5.0 qt., 4.1 Imp. qt.)
Power con-
trol unit1.3 L (1.4 qt., 1.1 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-sili-
cate, non-amine, non-nitrite, and non-borate coolant
with long-life hybrid organic acid technology
Do not use plain water alone.