overheating TOYOTA PRIUS PLUS 2014 Owners Manual

901-2. Hybrid system
PRIUS +_OM_OM47888E_(EE)
WARNING
■ Hybrid battery (traction battery)
Your vehicle contains a sealed lithium-ion battery.
●Never resell, hand over or modify the hybrid battery. To prevent accidents,
hybrid batteries that have been removed from a disposed vehicle are col-
lected through Toyota dealer. Do not dispose of the battery yourself.
Unless the battery is properly collected, the following may occur, resulting
in death or serious injury:
• The hybrid battery may be illegally disposed of or dumped, and it is haz-
ardous to the environment or someone may touch a high voltage part,
resulting in an electric shock.
• The hybrid battery is intended to be used exclusively with your hybrid vehicle. If the hybrid battery is used outside of your vehicle or modified
in any way, accidents such as electric shock, heat generation, smoke
generation, an explosion and electrolyte leakage may occur.
When reselling or handing over your vehicle, the possibility of an accident
is extremely high because the person receiving the vehicle may not be
aware of these dangers.
● If your vehicle is disposed of without the hybrid battery having been
removed, there is a danger of serious electric shock if high voltage parts,
cables and their connectors are touched. In the event that your vehicle
must be disposed of, the hybrid battery must be disposed of by any autho-
rized Toyota dealer or repairer, or another duly qualified and equipped pro-
fessional or a qualified service shop. If the hybrid battery is not disposed of
properly, it may cause electric shock that can result in death or serious
injury.
NOTICE
■ Hybrid battery (traction battery) air intake vent
●Do not place objects that will block the air intake vent. The hybrid battery
(traction battery) may overheat and be damaged.
● 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 any authorized Toyota
dealer or repairer, or another dul y qualified and equipped professional.

1172. Instrument cluster
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Instrument cluster
PRIUS +_OM_OM47888E_(EE)■
Remaining hybrid battery (tract ion battery) charge display
The charge amount of the hybrid battery (traction battery) is automatically
controlled by the hybrid system. For this reason, even if electricity is recov-
ered via the regenerative braking, or el ectricity is generated via the gasoline
engine, the displayed hybrid battery (traction battery) charge amount may not
reach the highest level (level 8). However, this does not indicate a malfunc-
tion.
■ Engine speed
On hybrid vehicles, engine speed is precisely controlled in order to help
improve fuel efficiency and reduce exhaust emissions etc.
■ Brightness of the instrument panel light
If the headlight switch is turned to ON while the surrounding area is dark, the
instrument cluster lights will dim.
■ When disconnecting and reconnect ing 12-volt battery terminals
The fuel consumption display and average vehicle speed will be reset.
NOTICE
■To prevent damage to the engine and its components
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. 444)
■ The trip information display at low temperatures
Allow the interior of the vehicle to warm up before using the liquid crystal
information display. At extremely low temperatures, the information display
monitor may respond slowly, and display changes may be delayed.

1964-1. Before driving
PRIUS +_OM_OM47888E_(EE)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■ When taking a nap in the vehicle
Always turn the hybrid system off. Otherwise, if you accidentally move the
shift lever or depress the accelerator pedal, this could cause an accident or
fire due to hybrid system overheating. Additionally, if the vehicle is parked in
a poorly ventilated area, exhaust gases may collect and enter the vehicle,
leading to death or a serious health hazard.
■ When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause
one side of the vehicle to brake differently than the other side. Also, the
parking brake may not securely hold the vehicle.
● If the electronically controlled assist function does not operate, do not fol-
low other vehicles closely and avoid downhill or sharp turns that require
braking.
In this case, braking is still possible, but the brake pedal should be
depressed more firmly than usual. Also, the braking distance will increase.
Have your brakes fixed immediately.
● The brake system consists of 2 or more individual hydraulic systems; if
one of the systems fails, the other(s) will still operate. In this case, the
brake pedal should be depressed more firmly than usual and the braking
distance will increase. Have y our brakes fixed immediately.
NOTICE
■ When driving the vehicle
●Do not depress the accelerator and brake pedals at the same time during
driving, as this may restrain driving torque.
● Do not use the accelerator pedal or depress the accelerator and brake
pedals at the same time to hold the vehicle on a hill.
■ When parking the vehicle
Always shift the shift position to P. Failure to do so may cause the vehicle to
move or the vehicle may accelerate suddenly if the accelerator pedal is
accidentally depressed.

2144-2. Driving procedures
PRIUS +_OM_OM47888E_(EE)
Parking brake
To set the parking brake, fully
depress the parking brake pedal
with your left foot while depress-
ing the brake pedal with your right
foot.
(Depressing the pedal again
releases the parking brake.)
■Parking brake engaged warning buzzer
→ P. 382
■ Usage in winter time
→ P. 265
Operating instructions
NOTICE
■Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to brake components
overheating, which may affect braking performance and increase brake
wear.

2504-5. Using the driving support systems
PRIUS +_OM_OM47888E_(EE)
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRC and
hill-start assist control systems
Any of the following conditions may occur when the above systems are oper-
ating. 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.
■ ECB operating sound
ECB operating sound may be heard in the following cases, but it does not
indicate that a malfunction has occurred.
●Operating sound heard from the engine compartment when the brake pedal
is operated.
● Motor sound of the brake system heard from the front part of the vehicle
when the driver’s door is opened.
● Operating sound heard from the engine compartment when 1-2 minutes
passed after the stop of the hybrid system.
■ 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. 377

2795-1. Using the air conditioning system and defogger
PRIUS +_OM_OM47888E_(EE)
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Interior features
Seat heaters∗
Heats the left front seat
Heats the right front seat
The indicator light comes on.
●The seat heaters can be used when the power switch is in ON mode.
● When not in use, turn off the switch. The indicator light turns off.
∗: If equipped
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WARNING
● Care should be taken to prevent injury if anyone in the following categories
comes in contact with the seats when the heater is on:
• 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.)
● Observe the following precautions to prevent minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat heater.
• Do not use seat heater more than necessary.
NOTICE
● 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, do not use the functions when the
hybrid system is off.

4447-2. Steps to take in an emergency
PRIUS +_OM_OM47888E_(EE)
If your vehicle overheats
■If the high coolant temperature warning light comes on or
flashesStop the vehicle in a safe place and turn off the air conditioning
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
any authorized Toyota dealer
or repairer, or another duly
qualified and equipped pro-
fessional.
The following may indicate that your vehicle is overheating.● The high coolant temperature warning light ( →P. 380) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
● Vehicles without multi-information display: The hybrid system
overheat warning light ( →P. 380) comes on.
● Vehicles with multi-information display: The warning message
indicating overheat is shown on the multi-information display.
(→ P. 391)
● Steam comes out from under the hood.
Correction procedures
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2
3
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480Alphabetical index
PRIUS +_OM_OM47888E_(EE)
Card holder............................... 288
CareAluminum wheels .................. 301
Exterior.................................. 300
Interior ................................... 305
Panoramic roof...................... 304
Radar sensor ................ 246, 260
Seat belts .............................. 306
Cargo hooks ............................. 289
CD player
*
Chains ....................................... 266
Child restraint system ............... 59 Baby seat definition................. 60
Baby seat installation .............. 68
Child seat definition................. 60
Child seat installation .............. 70
Installing CRS with ISOFIX rigid anchors ......................... 74
Installing CRS with seat belt ... 68
Installing CRS with top strap ... 76
Junior seats definition ............. 60
Junior seat installation ............ 72
Child safety ................................ 58 12-volt battery precautions.... 329
Airbag precautions .................. 48
Back door precautions .......... 148
Child restraint system ............. 59
How your child should wear the seat belt .......................... 42
Installing child restraints.......... 67
Power window lock switch .... 186
Power window precautions ... 188 Rear door child-protectors .... 145
Removed key battery
precautions......................... 352
Seat belt precautions .............. 44
Seat heater precautions........ 279
Child-protectors....................... 145
Cleaning Aluminum wheels.................. 301
Exterior ................................. 300
Interior................................... 305
Panoramic roof ..................... 304
Radar sensor ................ 246, 260
Seat belts .............................. 306
Climate remote control ........... 278
Clock ......................................... 293
Condenser ................................ 324
Console box ............................. 284
Coolant Capacity ................................ 458
Checking ............................... 323
Preparing and checking before winter....................... 265
Cooling system ........................ 323 Hybrid system overheating ... 444
Consumption screen ............... 131
Cruise control Cruise control........................ 227
Dynamic radar cruise control................................. 231
Warning messages ............... 391
Cup holders.............................. 285
Curtain shield airbags ............... 46
Customizable features ............ 465
C

482Alphabetical index
PRIUS +_OM_OM47888E_(EE)
Emergency, in case ofIf a warning buzzer sounds ... 376
If a warning light turns on ...... 376
If a warning message is displayed ............................ 388
If the 12-volt battery is discharged .......................... 439
If the electronic key does not operate properly ................. 437
If the hybrid system will not start..................................... 435
If you have a flat tire...... 404, 418
If you lose your keys ............. 141
If you think something is
wrong.................................. 375
If your vehicle becomes stuck ................................... 449
If your vehicle has to be
stopped in an emergency ... 369
If your vehicle needs to be towed .................................. 370
If your vehicle overheats ....... 444
Energy monitor ........................ 131 Engine
Accessory mode ................... 203
Compartment ........................ 317
Engine switch........................ 201
Exhaust gas precautions ........ 80
Hood ..................................... 313
How to start the hybrid system ................................ 201
Identification number ............ 454
If the hybrid system will not start .................................... 435
If your vehicle has to be
stopped in an emergency ... 369
Ignition switch (power switch) .................... 201
Overheating .......................... 444
Power switch......................... 201
Engine coolant
Capacity ................................ 458
Checking ............................... 323
Preparing and checking before winter....................... 265
Engine coolant temperature warning light .......................... 380

484Alphabetical index
PRIUS +_OM_OM47888E_(EE)
FuelCapacity ................................ 455
Fuel gauge ............................ 110
Gas station information ......... 496
Information ............................ 463
Refueling ............................... 224
Type ...................................... 455
Warning light ......................... 380
Fuel filler door .......................... 226
Fuses ........................................ 353
Gas station information .......... 496
Gauges...................................... 109
Glove box ................................. 284
Head restraints......................... 177
Headlights ................................ 215 Automatic headlight leveling ............................... 217
Light switch ........................... 215
Replacing light bulbs ............. 364
Heaters
Automatic air conditioning system ................................ 270
Outside rear view mirrors ...... 273
Seat heaters.......................... 279
High mounted stoplight Replacing .............................. 364
Hill-start assist control ............ 249
Hood.......................................... 313 Hooks
Cargo hooks ......................... 289
Retaining hooks (floor mat)..... 34
Horn .......................................... 180
Hybrid battery (traction battery) Location .................................. 85
Specification ......................... 455
Hybrid battery (traction battery) air intake
vent ........................................... 86
Hybrid system ............................ 81 Emergency shut off system .... 86
Energy monitor/consumption
screen.......................... 120,131
EV drive mode ...................... 206
High voltage components ....... 85
Hybrid System Indicator........ 116
Hybrid system precautions ..... 85
Hybrid vehicle driving tips ..... 262
If the hybrid system will not start .................................... 435
Overheating .......................... 444
Power switch......................... 201
Regenerative braking.............. 82
Starting the hybrid system .... 201
Hybrid System Indicator ......... 116
Hybrid transmission ................ 208
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