2014 TOYOTA PRIUS PLUG-IN HYBRID heating

332 2-4. Using other driving systems
PRIUS PHV_OM_OM47856U_(U)
■Sounds and vibrati ons caused by the ABS, brake assist, VSC and
TRAC
● A sound may be heard from the engine compartment when the hybrid
system is started, just after the vehicle begins to move, if the brake pedal
is depressed forcefully or repeatedly, or 1-2 minutes after the hybrid sys-
tem is stopped. This sound does not indicate that a malfunction has
occurred in any of these systems.
● Any of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
■ EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may
be heard. This does not indicate a malfunction.
■ Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of
time. The steering wheel may feel heavy as a result. Should this occur,
refrain from excessive steering input or stop the vehicle and turn the hybrid
system off. The EPS system should return to normal within 10 minutes.
■ Electric power steering system wa rning light (warning buzzer)
P. 542

369
3-1. Using the air conditioning system
and defogger
PRIUS PHV_OM_OM47856U_(U)
3
Interior features
■If air flow from the vents decreases dramatically
The filter may be clogged. Contact your Toyota dealer.
■ Operation of the air conditio ning system in Eco drive mode
In the Eco drive mode, the air conditioning system is controlled as follows to
prioritize fuel efficiency:
● Engine speed and compressor operation controlled to restrict heating/
cooling capacity
● Fan speed restricted when automatic mode is selected
To improve air conditioning performance, perform the following operations:
● Adjust the fan speed
● Turn off Eco drive mode ( P. 249)
● Customize the air conditioning control of Eco drive mode. ( P. 643)
■ When outside air temperature is below 32 °F (0 °C)
The cooling and dehumidification function may not operate even when
is pressed.
■ Air conditioning odors
●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.
■ Customization
Settings (e.g. enable/disable automatic operation of the air conditioning
compressor when the “AUTO” switch ON) can be changed.
(Customizable features P. 643)

400 3-5. Other interior features
PRIUS PHV_OM_OM47856U_(U)
CAUTION
■Burns
●Use caution when seating the following persons in a seat with the seat
heater on to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the physically chal-
lenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs, cold remedies, etc.)
● Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature
of the seat and may lead to overheating.
● Do not use the seat heater more than necessary. Doing so may cause
minor burns or overheating.
NOTICE
■To prevent seat heater damage
Do not put heavy objects that have an uneven surface on the seat and do
not stick sharp objects (needles, nails, etc.) into the seat.
■ To prevent 12-volt battery discharge
Turn the seat heaters off when the hybrid system is off.

5
When trouble arises
553
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47856U_(U)
Warning messageDetailsCorrection
procedure
(If equipped) • Indicates that the pre-collision
system is not currently func-
tional because the grille or the
sensor is dirty.
• This message also appears when the pre-collision system
is not functional due to over-
heating. • Check the grille
and the sensor and
clean them if they
are dirty.
• In case of over- heating, the system
will become func-
tional once the sys-
tem cools down.
(Flashes)
(If equipped) Indicates that the radar cruise
control sensor is dirty or cov-
ered with ice.
Clean the sensor.
(Flashes)
(If equipped) Indicates that the radar cruise
control system is unable to
judge vehicle-to-vehicle dis-
tance.
If the windshield
wipers are on, turn
them off or set
them to either the
intermittent or the
slow mode.

5
When trouble arises
603
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47856U_(U)
If your vehicle overheats
Correction procedures■ If the high coolant temperatur e warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air condition-
ing system, and then stop the hybrid system.
If you see steam: Carefully lift the hood after the steam subsides.
If you do not see steam: Carefully lift the hood.
After the hybrid system has
cooled down sufficiently, inspect
the hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The following may indicate that your vehicle is overheating.
●The high coolant temperature warning light ( P. 536) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle s peed does not increase.)
● “HYBRID SYSTEM OVERHEAT” ( P. 554) is shown on the
multi-informat ion display.
● Steam comes out from under the hood.
1 ÉTAPE
2 ÉTAPE
STEP 3

648 6-2. Customization
PRIUS PHV_OM_OM47856U_(U)
ItemFunctionDefault set-tingCustom-ized
setting
Meter and
instrument
panel
( P. 259) Sensor sensitiv-
ity for darkening
the brightness of
the meter, navi-
gation system
and instrument
panel depend-
ing on the out-
side brightness
0 -2 to +2 – – O
Sensor sensitiv-
ity for returning
the brightness of
the meter, navi-
gation system
and instrument
panel to the orig-
inal level
depending on
the outside
brightness 0 -2 to +2 – – O
Automatic
air
conditioning
system
( P. 360) Enable/disable
automatic
operation of the
air conditioning
compressor
when the
“AUTO” switch
ON
ON OFF – O O
Heating/cooling
operation mini-
mized in Eco
drive mode ON OFF – – O

674 Alphabetical index
PRIUS PHV_OM_OM47856U_(U)
Child restraint systemBooster seats, definition ........ 207
Booster seats, installation ..... 215
Convertible seats, definition ............................. 207
Convertible seats,
installation ........................... 215
Front passenger occupant classification system ........... 201
Infant seats, definition ........... 207
Infant seats, installation......... 215
Installing child restraint system with LATCH anchors ........... 213
Installing child restraint system with seat belts ..................... 215
Installing child restraint system with top tether strap ............ 219
Child safety
Airbag precautions ................195
Back door precautions .......... 146
Child restraint system............ 207
Child-protectors ..................... 139
How to charge .........................84
How your child should wear the seat belt ........................ 163
Installing child restraints ........ 212
Power window lock switch..... 175
Power window precautions ... 177
Remote Air Conditioning System precautions ............ 376
Removed electronic key
battery precautions ............. 497
Seat belt extender precautions ......................... 168
Seat belt precautions ............ 164
Seat heater precautions ........ 400
12-volt battery precautions .... 477 Child-protectors ....................... 139
Cleaning
Exterior.................................. 426
Interior ................................... 430
Seat belts .............................. 431
Clock ......................................... 277
Condenser ................................ 469
Console box ............................. 389
Cooling system
Engine overheating ............... 603
Hybrid system overheating ... 603
Cruise control
Cruise control ........................ 310
Dynamic radar cruise control ................................. 314
Cup holders .............................. 390
Curtain shield airbags ............. 187
Customizable features ............ 643

676 Alphabetical index
PRIUS PHV_OM_OM47856U_(U)
EngineAccessory mode.................... 242
Compartment ........................ 462
Hood...................................... 445
How to start the hybrid system ................................ 240
Identification number ............. 615
If the hybrid system will not start ..................................... 591
Ignition switch........................ 240
Overheating........................... 603
“POWER” switch ................... 240
Engine coolant Capacity ................................ 621
Checking ............................... 467
Preparing and checking before winter ....................... 351
Engine/power control
unit coolantCapacity ................................ 621
Checking ............................... 467
Preparing and checking before winter ....................... 351
Engine oil Capacity ................................ 618
Checking ............................... 463
Preparing and checking before winter ....................... 351
Enhanced VSC ......................... 330
EPS ............................................ 330
EV driving ratio indicator ........ 273
EV driving range ................58, 270
Event data recorder ...................25
EV/HV mode selection switch .......................................37 Floor mats ................................ 403
Fluid
Brake..................................... 623
Washer.................................. 472
Fog lights Replacing light bulbs ............. 510
Switch ................................... 300
Wattage................................. 624
Foot lights ................................ 384
Front fog lights
Replacing light bulbs ............. 510
Switch ................................... 300
Wattage................................. 624
Front passenger occupant classification system ............ 201
Front passenger’s seat belt reminder light ........................ 539
Front seats
Adjustment ............................ 150
Front side marker light Replacing light bulbs ............. 510
Wattage................................. 624
Front turn signal lights Replacing light bulbs ............. 510
Switch ................................... 256
Wattage................................. 624
Fuel Capacity ................................ 617
Fuel gauge ............................ 259
Information ............................ 625
Refueling ............................... 178
Type ...................................... 625
Fuel door .................................. 178
Fuel filler door .......................... 178
Fuses ........................................ 498F