2016 TOYOTA PRIUS V overheating

811-2. Hybrid system
PRIUS v_OM_OM47B12U_(U)
1
For safety and security
WARNING
■Hybrid battery (traction 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 your
Toyota dealer or a qualified service shop. If the hybrid battery is not dis-
posed 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 your Toyota dealer.

PRIUS v_OM_OM47B12U_(U)
992. Instrument cluster
2
Instrument cluster
■Remaining hybrid battery (traction 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 electricity 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 panel lights will dim.
■When disconnecting and reconnecting 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. 543)
■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.

164
PRIUS v_OM_OM47B12U_(U)
4-1. Before driving
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 your brakes fixed immediately.

188
PRIUS v_OM_OM47B12U_(U)
4-2. Driving procedures
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. 495
■Usage in winter time
P. 263
Operating instructions
(U.S.A.)
(Canada)
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.

250
PRIUS v_OM_OM47B12U_(U)
4-5. Using the driving support systems
■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.
■Automatic reactivation of TRAC system
After turning the TRAC system off, the system will be automatically re-
enabled in the following situations:
●When the power switch is turned off
●The TRAC will turn on when vehicle speed increases
■Electric power steering system warning light (warning buzzer)
P. 491
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will
operate:
●The shift position is in a position other than P or N (when starting off forward/
backward on an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.
■Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
●Shift the shift position to P or N.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse after the brake pedal is released.

372
PRIUS v_OM_OM47B12U_(U)
6-1. Using the air conditioning system and defogger
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 goes off.
: If equipped
1
2
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.

543
PRIUS v_OM_OM47B12U_(U)
8
When trouble arises
8-2. Steps to take in an emergency
If your vehicle overheats
■If the high coolant temperature warning light comes on or
flashes
Stop 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
your Toyota dealer.
The following may indicate that your vehicle is overheating.
●The high coolant temperature warning light (P. 493) 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. 493) comes on.
●Vehicles with multi-information display: The warning message
indicating overheat is shown on the multi-information display.
(P. 507)
●Steam comes out from under the hood.
Correction procedures
1
2
3
1
2

606Alphabetical index
PRIUS v_OM_OM47B12U_(U)
Child-protectors....................... 123
Cleaning
Aluminum wheels.................. 407
Exterior ................................. 406
Interior................................... 410
Panoramic roof ..................... 409
Radar sensor ................ 226, 258
Seat belts .............................. 411
Climate remote control ........... 371
Clock ................................... 92, 386
Condenser ................................ 433
Console box ............................. 377
Coolant
Capacity ................................ 557
Checking ............................... 431
Preparing and checking
before winter....................... 263
Cooling system ........................ 431
Hybrid system overheating ... 543
Consumption screen ............... 108
Cruise control
Cruise control........................ 210
Dynamic radar cruise
control................................. 214
Warning messages ............... 506
Cup holders.............................. 378
Curtain shield airbags ............... 41
Customizable features ............ 575Daytime running light
system.................................... 192
Defogger
Outside rear view mirrors ..... 366
Rear window ......................... 366
Windshield ............................ 366
Dimension ................................ 552
Dinghy towing.......................... 173
Display
Drive information .................. 102
Dynamic radar cruise
control ................................ 214
Energy monitor ............. 102, 108
LDA (Lane Departure
Alert)................................... 227
Multi-information display ....... 100
Trip information....................... 94
Warning messages ............... 503
Do-it-yourself maintenance .... 419
Door courtesy lights ............... 373
Location ................................ 373
Wattage ................................ 560D