cooling TOYOTA PRIUS C 2018 Owners Manual (in English)

781-2. Hybrid system
PRIUS c_U (OM52G95U)■
Sounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration even though the vehicle is able to
move with the “READY” indicator is illuminated. For safety, apply the parking
brake and make sure to shift the shift lever to P when parked.
The following sounds or vibrations may occur when the hybrid system is
operating and are not a malfunction:
●Motor sounds may be heard from the engine compartment.
● Sounds may be heard from the hybrid battery (traction battery) under t\
he
rear seats when the hybrid system starts or stops.
● Relay operating sounds such as a snap or soft clank will be emitted from the
hybrid battery (traction battery), under the rear seats, when the hybrid sys-
tem is started or stopped.
● Sounds from the hybrid system may be heard when the back door is open.
● Sounds may be heard from the transmission when the gasoline engine
starts or stops, when driving at low speeds, or during idling.
● Engine sounds may be heard when accelerating sharply.
● Sounds may be heard due to regenerative braking when the brake pedal is
depressed or as the accelerator pedal is released.
● Vibration may be felt when the gasoline engine starts or stops.
● Cooling fan sounds may be heard from the air intake vent on the side of the
lower part of the rear left seat.
■ Vehicle Proximity Notification System
In the following cases, the Vehicle Proximity Notification System sound may
be difficult for pedestrians, people ridi ng bicycles or other people and vehicles
in the surrounding area to hear:
● When there is a lot of noise in the vicinity
● When it is raining or during strong winds
● When in the area surrounding the rear of the vehicle, rather than in front of
the vehicle
■ Maintenance, repair, recycling, and disposal
Contact your Toyota dealer regarding maintenance, repair, recycling and dis-
posal. Do not dispose of the vehicle yourself.
■ Customization that can be co nfigured at Toyota dealer
Settings (e.g. the volume of Vehicle Proximity Notification System sound) can
be changed. (Customizable features: →P. 562)

801-2. Hybrid system
PRIUS c_U (OM52G95U)
There is an air intake vent on the
side of the lower part of the rear
left seat for the purpose of cooling
the hybrid battery (traction bat-
tery). When the air intake vent is
blocked, the battery operations
will be restricted and cause a
decline in fuel consumption.
When a certain level of impact is detected by the impact sensor, the
emergency shut off system blocks the high voltage current and stops
the fuel pump to minimize the risk of electrocution and fuel leakage. If
the emergency shut off sy stem activates, your vehicle will not restart.
To restart the hybrid system, contact your Toyota dealer.
A message is automatically displa yed when a malfunction occurs in
the hybrid system or an improper operation is attempted.
If a warning message is shown on
the multi-information display, read
the message and follow the
instructions. ( →P. 490)
Hybrid battery (traction battery) air intake vent
Emergency shut off system
Hybrid warning message

851-2. Hybrid system
1
For safety and security
PRIUS c_U (OM52G95U)
NOTICE
■Hybrid battery (traction battery) air intake vent
● Do not place objects that will block the air intake vent. When the air intake
vent is blocked, the battery operations will be restricted and cause a
decline in fuel consumption.
● Clean the air intake vent regularly to prevent the hybrid battery (traction
battery) from overheating.
● Do not get water or foreign materials in the air intake vent as this may
cause a short circuit and damage the hybrid battery (traction battery).
● Do not carry large amounts of water such as water cooler bottles in the
vehicle. If water spills onto the hybrid battery (traction battery), the battery
may be damaged. Have the vehicle inspected by your Toyota dealer.
● There is a filter installed to the air intake vent. When the filter remains
noticeably dirty even after cleaning the air intake vent, filter cleaning or
replacement is recommended. For information regarding filter cleaning or
replacement, contact your Toyota dealer.
● If “MAINTENANCE REQUIRED FOR TRACTION BATTERY COOLING
PARTS SEE OWNER’S MANUAL” is shown on the multi-information dis-
play, the air intake vent and filter may be clogged. Refer to P. 406 for infor-
mation on how to clean the air intake vent.

2014-2. Driving procedures
4
Driving
PRIUS c_U (OM52G95U)
*: To improve fuel efficiency and reduce noises, set the shift lever in the Dposition for normal driving.
Suitable for enhancing the fuel economy, because the torque corre-
sponding to the accelerator pedal depression amount can be gener-
ated more smoothly than it is in normal conditions and the operation
of the air conditioning system (heating/cooling) will be minimized.
Eco drive mode
When Eco drive mode is turned on,
the “ECO MODE” indicator will
come on.
Pressing the Eco drive mode
switch again turns Eco drive mode
off.
■ Operation of the air conditio ning system in Eco drive mode
Eco drive mode controls the heating/cooling operations and fan speed of the
air conditioning system to enhance fuel efficiency. ( →P. 378) To improve air
conditioning performance, adjust the temperature setting or fan speed, o\
r turn
off Eco drive mode.
■ When the accelerator pedal is depressed while the shift position is in N
A buzzer will sound to inform the driver that the shift position is in N.
Shift position purpose
Shift positionFunction
PParking the vehicle/starting the hybrid system
RReversing
NNeutral
DNormal driving*
BPosition for engine braking
Selecting Eco drive mode

272
PRIUS c_U (OM52G95U)
4-7. Driving tips
◆Using Eco drive mode
When using Eco drive mode, the torque corresponding to the accel-
erator pedal depression amount can be generated more smoothly
than it is in normal conditions. In addition, the operation of the air
conditioning system (h eating/cooling) will be minimized, improving
the fuel economy. ( →P. 201)
◆Use of Hybrid System Indicator
The Eco-friendly driving is possible by keeping the needle of Hybrid
System Indicator within Eco area. ( →P. 108)
◆Shift lever operation
Shift the shift lever to D when stopped at a traffic light, or driving in
heavy traffic etc. Shift the shift le ver to P when parking. When using
the N, there is no positive effect on fuel consumption. In the N, the
gasoline engine operates but elec tricity cannot be generated. Also,
when using the air conditioning s ystem, etc., the hybrid battery
(traction battery) power is consumed.
◆Accelerator pedal/brake pedal operation
● Drive your vehicle smoothly. Avoid abrupt acceleration and
deceleration. Gradual accelerati on and deceleration will make
more effective use of the electric motor (traction motor) without
having to use gasoline engine power.
● Avoid repeated acceleration. Repeated acceleration consumes
hybrid battery (traction battery) power, resulting in poor fuel con-
sumption. Battery power can be restored by driving with the
accelerator pedal slightly released.
◆When braking
Make sure to operate the brakes gently and in a timely manner. A
greater amount of electrical energy can be regenerated when slow-
ing down.
Hybrid vehicle driving tips
For economical and ecological driv ing, pay attention to the fol-
lowing points:

3846-1. Using the air conditioning system and defogger
PRIUS c_U (OM52G95U)■
Outside/recirculated air mode
●When driving on dusty roads such as tunnels or in heavy traffic, set the out-
side/recirculated air mode button to the recirculated air mode. This is effec-
tive in preventing outside air from entering the vehicle interior. During
cooling operation, setting the recirculated air mode will also cool the vehicle
interior effectively.
● Outside/recirculated air mode may automatically switch depending on the
temperature setting or the inside temperature.
■ When the outside temperature exceeds 75 °F (24 °C) and the air condition-
ing system is on
● In order to reduce the air conditioning power consumption, the air condition-
ing system may switch to recirculated air mode automatically. This may also
reduce fuel consumption.
● Recirculated air mode is selected as a default mode when the power switch
is turned to the “ON” position (vehicles without a smart key system) or the
power switch is turned to ON mode (vehicles with a smart key system).
● It is possible to switch to outside air mode at any time by pressing .
■ When the outside temperat ure falls to nearly 32°F (0°C)
The dehumidification function may not operate even when is pressed.
■ Ventilation and air conditioning odors
●To let fresh air in, set the air conditioning system to the outside air m\
ode.
● During use, various odors from inside and outside the vehicle may enter into
and accumulate in the air conditioning system. This may then cause odor to
be emitted from the vents.
● To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to outside air
mode prior to turning the vehicle off.
• The start timing of the blower may be delayed for a short period of time
immediately after the air conditioning system is started in automatic
mode.
■ Air conditioning filter
→P. 451
■ Customization
Settings (e.g. A/C auto switch operation) can be changed.
(Customizable features: →P. 563)

4067-1. Maintenance and care
PRIUS c_U (OM52G95U)
To prevent the hybrid battery (traction battery) air intake vent from
becoming clogged, clean it periodically.
■Cleaning the air intake vent
Remove any dust and clogs
from the air intake vent with a
vacuum cleaner, etc.
The air intake vent has a filter
behind the air intake vent cover.
If “MAINTENANCE REQUIRED FOR TRACTION BATTERY
COOLING PARTS SEE OWNER’S MANUAL” is displayed on the
multi-information display, the filt er may be clogged. Remove the air
intake vent cover and clean the filter.
■Cleaning the air intake vent filter
The air intake vent filter is
located below the rear seat
cushion on the left side.
Remove the 2 clipsPush in the center part of
the clips
Remove the clips
Cleaning the hybrid battery (traction battery) air intake vent
1
1
2

4087-1. Maintenance and care
PRIUS c_U (OM52G95U)
Start the hybrid system and check that “MAINTENANCE
REQUIRED FOR TRACTION BATTERY COOLING PARTS SEE
OWNER’S MANUAL” is no longer displayed on the multi-infor-
mation display.
It may take approximately 20 minutes for the warning message to
disappear after the hybrid system is started. If the warning mes-
sage does not disappear even th ough the filter has been cleaned,
have the vehicle inspected by your Toyota dealer.
■Caring for leather areas
Toyota recommends cleaning the interior of the vehicle at least twice a year to
maintain the quality of the vehicle's interior.
■ Shampooing the carpets
There are several commercial foaming-type cleaners available. Use a sponge
or brush to apply the foam. Rub in overlapping circles. Do not use water.
Wipe dirty surfaces and let them dry. Excellent results are obtained by keep-
ing the carpet as dry as possible.
■ Air intake vent maintenance
●If the vehicle is driven with the air intake vent clogged, the hybrid battery
(traction battery) may overheat and the fuel consumption may increase.
● Depending on the conditions under which the vehicle is used, the air intake
vent may need to be cleaned more regularly.
■ Seat belts
Clean with mild soap and lukewarm water using a cloth or sponge. Also
check the belts periodically for excessive wear, fraying or cuts.
■ Cleaning the air intake vent filter
●Improper handling of the air intake vent cover and filter may result in dam-
age to them. If you have any concerns about cleaning the filter, contact your
Toyota dealer.
● If the vehicle is driven with the air intake vent filter clogged, the hybrid bat-
tery (traction battery) may overheat and the fuel consumption may increase.
● Depending on the conditions under which the vehicle is used, the air intake
vent filter may need to be cleaned more regularly.
6

4097-1. Maintenance and care
7
Maintenance and care
PRIUS c_U (OM52G95U)■
If “MAINTENANCE REQUIRED FOR TRACTION BATTERY COOLING
PARTS SEE OWNER’S MANUAL” is di splayed on the multi-information
display
● It is possible the air intake vent or filter is clogged due to accumulated dust.
Clean the air intake vent and filter, referring to the cleaning method.
● When continuously driven in this state, the hybrid battery (traction battery)
may overheat, which may lead to the driving distance by the electric motor
getting shorter, the fuel consumption worsening, and causing damage.
Clean the air intake vent periodically to prevent dust, etc., from collecting in
the air intake vent or filter.
● If the massage in the multi-information display does not turn off, even if the
air intake vent is cleaned, have the vehicle inspected at your Toyota dealer.
WARNING
■Water in the vehicle
● Do not splash or spill liquid in the vehicle, such as on the floor, in the
hybrid battery (traction battery) air vents, and in the luggage compartment.
Doing so may cause the hybrid battery, electrical components, etc. to mal-
function or catch fire.
● Do not get any of the SRS components or wiring in the vehicle interior wet.
(→P. 41)
An electrical malfunction may cause the airbags to deploy or not function
properly, resulting in death or serious injury.
■ Cleaning the interior (especially instrument panel)
Do not use polish wax or polish cleaner. The instrument panel may reflect
off the windshield, obstructing the driver's view and leading to an accident,
resulting in death or serious injury.
■ When cleaning the hybrid battery (tr action battery) air intake vent/filter
● Do not use water or other liquids to clean the air intake vent/filter. If water
is applied to the hybrid battery (traction battery) or other components, a
malfunction or fire may occur.
● When the air intake vent cover, located below the rear seat cushion on the
left side is to be removed, make sure to turn the power switch off to stop
the hybrid system.

4197-3. Do-it-yourself maintenance
7
Maintenance and care
PRIUS c_U (OM52G95U)
Washer fluid (→P. 432)
• Water or washer fluid containing antifreeze
(for winter use)
• Funnel (used only for adding water or washer
fluid)
WARNING
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury, observe the following precautions:
■When working on the engine compartment
● Vehicles without a smart key system: Make sure that the power switch is in
the “LOCK” position and the “READY” indicator is off.
Vehicles with a smart key system: Make sure that the indicator on the
power switch and the “READY” indicator are both off.
● Keep hands, clothing and tools away from the moving fan and engine
drive belt.
● Be careful not to touch the engine, power control unit, radiator, exhaust
manifold, etc. right after driving as they may be hot. Oil and other fluids
may also be hot.
● Do not leave anything that may burn easily, such as paper and rags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes
are flammable.
■ When working near the electric cooling fan or radiator grille
Vehicles without a smart key system: The electric cooling fan may keep
rotating for about 3 minutes even after the power switch is turned to the
“LOCK” position.
With the power switch in the “ON” position, the electric cooling fan may
automatically start to run if the air conditioning is on and/or the coolant tem-
perature is high. Be sure the power switch is in the “LOCK” position when
working near the electric cooling fan or radiator grille.
Vehicles with a smart key system: The electric cooling fan may keep rotat-
ing for about 3 minutes even after the power switch is off.
With the power switch in ON mode, the electric cooling fan may automati-
cally start to run if the air condition ing is on and/or the coolant temperature
is high. Be sure the power switch is off when working near the electric cool-
ing fan or radiator grille.
ItemsCheck points