2019 TOYOTA PRIUS C cooling

781-2. Hybrid system
PRIUS c_U■
Sounds and vibrations sp ecific to a hybrid vehicle
There may be no engine sound or vibration even though the vehic le is able to
move with the “READY” indicator is illuminated. For safety, app ly 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 sy stem 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 the
rear seats when the hybrid system starts or stops.
● Relay operating sounds such as a snap or soft clank will be emi tted 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 Syst em sound may
be difficult for pedestrians, people riding 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, recyc ling and dis-
posal. Do not dispose of the vehicle yourself.
■ Customization that can be configured at Toyota dealer
Settings (e.g. the volume of Vehicle Proximity Notification System sound) can
be changed. (Customizable features: P. 558)

801-2. Hybrid system
PRIUS c_U
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 ri sk of electrocution and fuel leakage. If
the emergency shut off system activates, your vehicle will not restart.
To restart the hybrid system , contact your Toyota dealer.
A message is automatically displ ayed 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. 485)
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
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 batte ry (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 b attery).
● Do not carry large amounts of water such as water cooler bottle s in the
vehicle. If water spills onto the hybrid battery (traction batt ery), the battery
may be damaged. Have the vehicle inspected by your Toyota deale r.
● There is a filter installed to the air intake vent. When the fi lter remains
noticeably dirty even after cleaning the air intake vent, filte r cleaning or
replacement is recommended. For information regarding filter cl eaning 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 . 402 for infor-
mation on how to clean the air intake vent.

2014-2. Driving procedures
4
Driving
PRIUS c_U
*: To improve fuel efficiency and reduce noises, set the shift lever in the D
position for normal driving.
Suitable for enhancing the fuel economy, because the torque cor re-
sponding to the accelerator pedal depression amount can be gene r-
ated more smoothly than it is in normal conditions and the oper ation
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 conditioning 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. 374) To improve air
conditioning performance, adjust the temperature setting or fan speed, or turn
off Eco drive mode.
■ When the accelerator p edal is depressed while the shift position is in N
A buzzer will sound to inform the driver that the shift positio n 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

3806-1. Using the air conditioning system and defogger
PRIUS c_U■
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 interi or. During
cooling operation, setting the recirculated air mode will also cool the vehicle
interior effectively.
● Outside/recirculated air mode may automatically switch dependin g 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 pre ssing .
■ When the outside tempera ture falls to nearly 32F (0 C)
The dehumidification function may not operate even when is pre ssed.
■ Ventilation and air conditioning odors
●To let fresh air in, set the air conditioning system to the out side air mode.
● During use, various odors from inside and outside the vehicle m ay enter into
and accumulate in the air conditioning system. This may then ca use odor to
be emitted from the vents.
● To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to o utside air
mode prior to turning the vehicle off.
• The start timing of the blower may be delayed for a short peri od of time
immediately after the air conditioning system is started in aut omatic
mode.
■ Air conditioning filter
P. 447
■ Customization
Settings (e.g. A/C auto switch operation) can be changed.
(Customizable features: P. 559)

4027-1. Maintenance and care
PRIUS c_U
To prevent the hybrid battery (traction battery) air intake vent from
becoming clogged, cl ean 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 filter may be clogged. Remove th e 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

4047-1. Maintenance and care
PRIUS c_U
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 minu tes for the warning message to
disappear after the hybrid syste m is started. If the warning mes-
sage does not disappear even th ough the filter has been cleaned,
have the vehicle inspect ed 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. U se 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 obt ained 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 in crease.
● Depending on the conditions under which the vehicle is used, th e 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 cut s.
■ 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 m ay increase.
● Depending on the conditions under which the vehicle is used, th e air intake
vent filter may need to be cleaned more regularly.
6

4057-1. Maintenance and care
7
Maintenance and care
PRIUS c_U■
If “MAINTENANCE REQUIRED FO R TRACTION BATTERY COOLING
PARTS SEE OWNER’S MANUAL” is displayed 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 ele ctric motor
getting shorter, the fuel consumption worsening, and causing da mage.
Clean the air intake vent periodically to prevent dust, etc., f rom 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 i nterior wet.
( P. 41)
An electrical malfunction may cause the airbags to deploy or no t function
properly, resulting in death or serious injury.
■ Cleaning the interior (esp ecially instrument panel)
Do not use polish wax or polish cleaner. The instrument panel m ay reflect
off the windshield, obstructing the driver's view and leading t o an accident,
resulting in death or serious injury.
■ When cleaning the hybrid batte ry (traction 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 co mponents, a
malfunction or fire may occur.
● When the air intake vent cover, located below the rear seat cus hion on the
left side is to be removed, make sure to turn the power switch off to stop
the hybrid system.