engine overheat TOYOTA PRIUS PLUS 2014 Owners Manual

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PRIUS +_OM_OM47888E_(EE)6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ......................311
Hood ..................................313
Positioning a floor jack .......315
Engine compartment..........317
12-volt battery ....................327
Tires ...................................331
Tire inflation pressure ........343
Wheels ...............................345
Air conditioning filter ..........347
Wiper rubber replacement .....................349
Electronic key battery ........351
Checking and replacing fuses ................................353
Light bulbs .........................357
7-1. Essential information Emergency flashers ...........368
If your vehicle has to be stopped in an
emergency .......................369 7-2. Steps to take in an
emergency
If your vehicle needs to be towed ..................... 370
If you think something is wrong .............................. 375
If a warning light turns on or a warning buzzer
sounds ............................ 376
If a warning message is displayed ......................... 388
If you have a flat tire (vehicles with a
spare tire) ........................ 404
If you have a flat tire (vehicles without a
spare tire) ........................ 418
If the hybrid system will not start ........................... 435
If the electronic key does not operate properly ........ 437
If the 12-volt battery is discharged ...................... 439
If your vehicle overheats ........................ 444
If the vehicle becomes stuck................................ 449
7When trouble arises

15Pictorial index
PRIUS +_OM_OM47888E_(EE)Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 219
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 265
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . P. 302
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 224
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 224
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 455
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 331
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 461
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 265
Checking/rotation/tire pressure warning system . . . . . . . . . . . P. 331
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 404, 418
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 313
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 313
Engine compartment cover . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 318
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 455
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 444
Headlights/front position lights/
daytime running lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 215
Front fog lights/rear fog light
*. . . . . . . . . . . . . . . . . . . . . . . P. 218
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 213
Stop/tail lights
Hill-start assist control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 249
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 215
Back-up light
*
Shifting the shift lever to R. . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 208
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Light bulbs of the exterior lights for driving
(Replacing method: P. 357, Watts: P. 462)
*: They may be located on the opposite side depending on the target region.
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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.

1924-1. Before driving
PRIUS +_OM_OM47888E_(EE)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■ When starting the vehicle
Always keep your foot on the brake pedal while stopped with the “READY”
indicator is illuminated. This prevents the vehicle from creeping.
■ When driving the vehicle
●Do not drive if you are unfamiliar with the location of the brake and accel-
erator pedals to avoid depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the brake
pedal will result in sudden acceleration that may lead to an accident.
• When backing up, you may twist your body around, leading to a diffi- culty in operating the pedals. Make sure to operate the pedals properly.
• Make sure to keep a correct driving posture even when moving the vehicle only slightly. This allows you to depress the brake and accelera-
tor pedals properly.
• Depress the brake pedal using your right foot. Depressing the brake pedal using your left foot may delay response in an emergency, result-
ing in an accident.
● The driver should pay extra attention to pedestrians when the vehicle is
powered only by the electric motor (traction motor). As there is no engine
noise, the pedestrians may misjudge the vehicle’s movement.
● Do not drive the vehicle over or stop the vehicle near flammable materials.
The exhaust system and exhaust gases can be extremely hot. These hot
parts may cause a fire if there is any flammable material nearby.
● 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. 369
● 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. 209)
● Do not adjust the positions of the steering wheel, the seat, or the inside or
outside rear view mirrors while driving.
Doing so may result in a loss of vehicle control.
● Always check that all passengers’ arms, heads or other parts of their body
are not outside the vehicle.

1944-1. Before driving
PRIUS +_OM_OM47888E_(EE)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■ If you hear a squealing or scrapi ng noise (brake pad wear indicators)
Have the brake pads checked and replaced by any authorized Toyota
dealer or repairer, or another dul y qualified and equipped professional as
soon as possible.
Rotor damage may result if the pads are not replaced when needed.
It is dangerous to drive the vehicle when the wear limits of the brake pads
and/or those of the brake discs are exceeded.
■ When the vehicle is stopped
●Do not depress the accelerator pedal unnecessarily.
If the shift position is in any position other than P or N, the vehicle may
accelerate suddenly and unexpectedly, causing an accident.
● In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while stopped with the “READY” indicator is
illuminated, and 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.

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

3807-2. Steps to take in an emergency
PRIUS +_OM_OM47888E_(EE)
(If equipped)
Hybrid system overheat warning light (warning buzzer)The hybrid system has overheated
This light may come on when driving under severe operat-
ing conditions, and the output of the hybrid system may
temporarily decrease in order to protect the system. (For
example, when driving up a long steep hill or driving up a
steep hill in reverse.)
→ Stop and check. ( →P. 444)
(If equipped)
Cruise control indicator (yellow indicator)
Indicates a malfunction in the cruise control
→ Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
(Only outer frame flashes)
(If equipped)
Low hybrid battery (traction battery) warning light
(warning buzzer)
Hybrid battery (traction battery) level becomes low
because the shift position is in N for long time
→ Because recharging is not possible when the shift
position is in N, shift the shift position to P when
parking the vehicle for a long time.
High coolant temperature warning light
Changes from a flashing to a solid light when the engine
coolant temperature increases
→ Stop and check. ( →P. 444)
Automatic headlight leveling system warning light
Indicates a malfunction in the automatic headlight leveling
system
→ Have the vehicle inspected by any authorized Toyota
dealer or repairer, or another duly qualified and
equipped professional immediately.
Open door warning light (warning buzzer)*3
Indicates that a door is not fully closed
→ Check that all the doors are closed.
Low fuel level warning light
Indicates that remaining fuel is approximately 6.0 L (1.6
gal., 1.3 Imp.gal.) or less
→ Refuel the vehicle.
Warning lightWarning light/Details/Actions

3917-2. Steps to take in an emergency
PRIUS +_OM_OM47888E_(EE)
7
When trouble arises
(If equipped)
Indicates a malfunction in:
• The cruise control system; or
• The dynamic radar cruise control system
Press the “ON-OFF” button once to deactivate
the system, and then press the button again to
reactivate the system.A buzzer also sounds.
→ Have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another
duly qualified and equipped professional.
(If equipped)
Indicates a malfunction in the pre-crash safety
system
A buzzer also sounds.
→ Have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another
duly qualified and equipped professional
immediately.
Indicates an engine oil pressure malfunction
A buzzer also sounds.
→ Immediately contact any authorized Toyota
dealer or repairer, or another duly qualified
and equipped professional.
Indicates that the hybrid system has overheated
This message may be displayed when driving
under severe operating conditions, and the out-
put of the hybrid system may temporarily
decrease in order to protect the system. (For
example, when driving up a long steep hill or
driving up a steep hill in reverse.)
A buzzer also sounds.
→ Stop and check. ( →P. 444)
Warning messageDetails/Actions
(Flashes)

4477-2. Steps to take in an emergency
PRIUS +_OM_OM47888E_(EE)
7
When trouble arises
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system and check for the instrument clus-
ter or multi-information display.
If the hybrid system overheat warning light does not turn off or
the message does not disappear:
Stop the hybrid system and contact any authorized Toyota dealer
or repairer, or another duly qualified and equipped professional.
If the hybrid system overheat warning light does not come on or
the message is not displayed:
The hybrid system temperature has dropped and the vehicle may
be driven normally.
However, if the warning light comes on again frequently or the message
appears again frequently, contact any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional.
WARNING
■ When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot.
● After the hybrid system has been turned off, check that the indicator on the
power switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fan may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the coolant reservoir cap while the hybrid system and radia-
tor are hot.
High temperature steam or coolant could spray out.
6

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