2014 TOYOTA PRIUS PLUG-IN engine overheat

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1-1. Plug-in hybrid system
1
Before driving
PRIUS PHV_OM_OM47856U_(U)
NOTICE
■Hybrid battery (traction battery) air vents
●Do not put foreign objects near the air vents. The hybrid battery (traction
battery) may overheat, leading to a reduction in hybrid battery (traction
battery) output or a malfunction.
●Clean the air vents regularly to prevent the hybrid battery (traction battery)
from overheating.
●Do not wet or allow foreign substances to enter the air vents 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.
●If the rear seat belt becomes separated from the guide (→P. 1 5 4 ) , i t c o u l d
obstruct the hybrid battery (traction battery) air vent. Set the rear seat belt
into the guide to use.
■Notice about fuel
For plug-in hybrid vehicles, fuel may remain in the tank for a long time and
undergo changes in quality depending on the how the vehicle is used.
Refuel at least 5.3 gal.(20 L, 4.4 Imp.gal.) of fuel every 6 months (refuel a
total of at least 5.3 gal. [20 L, 4.4 Imp.gal.] over a 6-month period), as this
may affect components of the fuel system or the gasoline engine.

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2-1. Driving procedures
PRIUS PHV_OM_OM47856U_(U)
2
When driving
CAUTION
●If the smell of exhaust is noticed inside the vehicle, open the windows and
check that the back door is closed. Large amounts of exhaust in the vehi-
cle can cause driver drowsiness and an accident, resulting in death or a
serious health hazard. Have the vehicle inspected by your Toyota dealer
immediately.
●Do not shift the shift position to P while the vehicle is moving.
Doing so can damage the transmission and may result in a loss of vehicle
control.
●Do not shift the shift position to R while the vehicle is moving forward.
Doing so can damage the transmission and may result in a loss of vehicle
control.
●Do not shift the shift position to D while the vehicle is moving backward.
Doing so can damage the transmission and may result in a loss of vehicle
control.
●Moving the shift position to N while the vehicle is moving will disengage
the hybrid system. Engine braking is not available with the hybrid system
disengaged.
●During normal driving, do not turn off the hybrid system. Turning the hybrid
system off while driving will not cause loss of steering or braking control,
however, power assist to the steering will be lost. This will make it more
difficult to steer smoothly, so you should pull over and stop the vehicle as
soon as it is safe to do so.
In the event of an emergency, such as if it becomes impossible to stop the
vehicle in the normal way: →P. 6 1 0
●Use engine braking (shift position B instead of shift position D) to maintain
a safe speed when driving down a steep hill.
Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. (→P. 2 4 7 )

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2-1. Driving procedures
PRIUS PHV_OM_OM47856U_(U)
CAUTION
■When the vehicle is stopped
●Do not depress the accelerator pedal unnecessarily.
If the vehicle is in any shift position other than P or N, the vehicle may
accelerate suddenly and unexpectedly, causing an accident.
●Do not leave the vehicle with the hybrid system on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space
and check that exhaust fumes do not enter the vehicle interior.
●In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while the “READY” indicator is on. Apply the
parking brake as necessary.
●If the vehicle is stopped on an incline, in order to prevent accidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
●Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause
the exhaust system to overheat, which could result in a fire if combustible
material is nearby.

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2-2. Instrument cluster
PRIUS PHV_OM_OM47856U_(U)
2
When driving
CAUTION
■To p r e v e n t a n a c c i d e n t
NOTICE
■To p r e v e n t d a m a g e t o t h e e n g i n e a n d i ts c o m p o n e n ts
The engine may be overheating if the high coolant temperature warning light
comes on or flashes. In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. (→P. 6 0 3 )
Do not place anything or attach a sticker
in front of the instrument cluster. The item
may obscure or obstruct the display, or
could reflect off the display, possibly
causing an accident.
Instrument cluster

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2-4. Using other driving systems
PRIUS PHV_OM_OM47856U_(U)
■Sounds and vibrations 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 warning light (warning buzzer)
→P. 5 4 2

674
Alphabetical index
PRIUS PHV_OM_OM47856U_(U)
Child restraint system
Booster 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)
Engine
Accessory 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 coolant
Capacity ................................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 ........................................ 498
F

679
Alphabetical index
PRIUS PHV_OM_OM47856U_(U)
Odometer ................................. 268
Oil
Engine oil.............................. 463
Opener
Back door ............................. 144
Fuel filler door....................... 178
Hood ..................................... 445
Outside rear view mirrors
Adjusting and folding ............ 173
Outside rear view mirror
defogger switch .................... 377
Outside temperature
display ................................... 396
Overheating ............................. 603
Parking brake .......................... 257
Parking lights
Switch................................... 294
PCS........................................... 337
Personal lights
Switch................................... 385
Wattage ................................ 624
Plug-in hybrid system
Driving tips.............................. 67
EV driving range..................... 58
EV mode................................. 35
EV/HV mode selection
switch ................................... 37
Features ................................. 32
How to charge ........................ 84
HV mode ................................ 36
Plug-in Hybrid Applications .... 74
Power outlets........................... 397
Power sources........................... 81
“POWER” switch ..................... 240
Power windows ....................... 175
Pre-collision system ............... 337
Radar cruise control
system ....................................314
Radiator ....................................469
Radio*
Radio data system*
RDS*
Rear seats
Adjustment ............................153
Folding down .........................154
Rear turn signal lights
Replacing light bulbs .............510
Wattage .................................624
Rear view mirror...............170, 173
Rear view monitor system*
Rear window and outside
rear view mirror
defoggers ...............................377
Rear window wiper and
washer ....................................306
Remote Air Conditioning
System ....................................373
Replacing
Electronic key battery ............496
Fuses ....................................498
Light bulbs .............................510
Tires ......................................451
Reporting safety defects for
U.S. owners ............................654
O
P
R
*:Refer to “DISPLAY AUDIO SYSTEM OWNER’S MANUAL”
or “NAVIGATION SYSTEM OWNER’S MANUAL”.