overheating TOYOTA PRIUS PLUG-IN HYBRID 2016 Owners Manual

1272-2. Charging
2
Plug-in hybrid system
PRIUS PHV_OM_OM47A89E_(EE)
For safety, inspect the charging cable on a routine basis.
Inspecting and maintaining the charging cable
WARNING
■Routine inspection
Check the following points regularly.
Failure to do so may cause an unexpected accident, resulting in death or
serious injury.
● The charging cable, plug, charging connector, CCID (Charging Circuit
Interrupting Device) etc. have not been damaged
● The socket has not been damaged
● The plug can be securely inserted into the socket
● The plug does not get extremely hot during use
● The tip of the plug has not been deformed
● The plug is not dirtied by dust etc.
Remove the plug from the socket before inspecting it. If any abnormalities
are found in the charging cable as a result of the inspection, immediately
stop use and consult any authorized Toyota dealer or repairer, or another
duly qualified and equipped professional.
■ Maintaining the charging cable
When the charging cable is dirty, first remove the dirt with a hard, wringed
cloth, and then wipe the cable with a dry cloth.
However, never wash it with water. If the charging cable is washed with
water, fire or electric shock may oc cur during charging, possibly resulting in
death or serious injury.
■ When not using the charging cable for a long time
Remove the plug from the socket. Dust could accumulate on the plug or in
the socket, possibly causing overheating which could lead to a fire.
Also, keep the cable in a place free from moisture.

2063. Instrument cluster
PRIUS PHV_OM_OM47A89E_(EE)
WARNING
■If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning light not
come on when you start the hybrid system, this could mean that these sys-
tems are not available to help protect you in an accident, which could result
in death or serious injury. Have the vehicle inspected by any authorized
Toyota dealer or repairer, or another duly qualified and equipped profes-
sional immediately if this occurs.
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. 688)

3215-1. Before driving
PRIUS PHV_OM_OM47A89E_(EE)
5
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.

3405-2. Driving procedures
PRIUS PHV_OM_OM47A89E_(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 the vehicle
 P. 313
■ Parking brake engaged warning buzzer
A buzzer will sound if the vehicle is driven with the parking brake engaged.
“Release Parking Brake” is displayed on the multi-information display (with
the vehicle reached a speed of 5 km/h [3 mph]).
■ Usage in winter time
 P. 499
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.

4945-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)■Sounds and vibrations caused by the ABS, brake assist, VSC, TRC and
hill-start assist control systems
●A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the hybrid system is started or just after the
vehicle begins to move. 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 also after the vehicle comes to a stop.
■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 one or two min-
utes 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. 642
■Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automatically
re-enabled in the following situations:
●When the power switch is turned off
●If only the TRC system is turned off, the TRC will turn on when vehicle
speed increases
If both the TRC and VSC systems are turned off, automatic re-enabling will
not occur when vehicle speed increases.

5206-1. Using the air conditioning system and defogger
PRIUS PHV_OM_OM47A89E_(EE)
Seat heaters
Seat heaters heat the front seats.
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.

6888-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A89E_(EE)
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
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. 644) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
● “Hybrid System Overheated” is shown on the multi-information
display.
● Steam comes out from under the hood.
Correction procedures
1
2
3
1
2

727Alphabetical index
PRIUS PHV_OM_OM47A89E_(EE)
Child-protectors ....................... 272
Cleaning............................ 546, 551
Aluminum wheels .................. 547
Camera sensor ..................... 363
Exterior.................................. 546
Interior ................................... 551
Radar sensor ........................ 362
Seat belts .............................. 554
Water-repellent coating ......... 547
Clock ......................................... 190
Adjustment ............................ 196
Coat hooks ............................... 543
Combination meter .................. 190
Clock adjustment .................. 196
Main display .......................... 207
Multi-information display ....... 215
Warning lights and
indicators ............................ 199
Condenser ................................ 572
Console box ............................. 526
Consumption screen ............... 260
Coolant ..................................... 570
Capacity ................................ 702
Checking ............................... 570
Preparing and checking
before winter....................... 498
Cooling system ........................ 570
Engine overheating ............... 688
Hybrid system overheating ... 690
Cruise control .......................... 397
Dynamic radar cruise
control with full-speed
range .................................. 397
Cup holders .............................. 527
Curtain shield airbags ............... 39
Customizable features ............ 708Daytime running light
system .................................... 342
Deck board ............................... 530
Defogger
Outside rear view mirrors...... 509
Rear window ......................... 509
Windshield ............................ 509
Dimension ................................ 696
Display
BSM (Blind Spot Monitor) ..... 417
Drive information................... 217
Dynamic radar cruise
control with full-speed
range .................................. 397
Energy monitor ............. 218, 257
Head-up display .................... 249
Intelligent Clearance
Sonar.................................. 449
LDA (Lane Departure Alert
with steering control) .......... 386
Main display .......................... 207
Multi-information display ....... 215
Pre-crash warning................. 368
RSA (Road Sign Assist)........ 393
S-IPA (Simple Intelligent
Parking Assist System) ...... 460
Toyota parking assist
sensor................................. 433
Warning messages ............... 650
Do-it-yourself maintenance .... 560
Door courtesy lights................ 522
Location ................................ 522
Wattage ................................ 705D

729Alphabetical index
PRIUS PHV_OM_OM47A89E_(EE)
Engine
Accessory mode ................... 329
Compartment ........................ 566
Engine switch ........................ 327
Exhaust gas precautions......... 50
Hood ..................................... 563
How to start the hybrid
system ................................ 327
Identification number............. 698
If the hybrid system will not
start..................................... 676
If your vehicle has to be
stopped in an emergency ... 633
Ignition switch
(power switch) .................... 327
Overheating .......................... 688
Power switch ......................... 327
Engine coolant ......................... 570
Capacity ................................ 702
Checking ............................... 570
Preparing and checking
before winter....................... 498Engine oil ................................. 567
Capacity ................................ 700
Checking ............................... 567
Oil pressure warning light ..... 642
Preparing and checking
before winter....................... 498
Engine switch .......................... 327
Auto power off function ......... 329
Changing the power switch
modes................................. 329
If your vehicle has to be
stopped in an emergency ... 633
Starting the hybrid system .... 327
EPS (Electronic Power
Steering)................................. 492
Function ................................ 492
Warning light ......................... 642
EV City mode switch ................. 92
EV driving range ...................... 111
EV mode ..................................... 89
EV/HV mode selection
switch ....................................... 92
Exhaust gas precautions .......... 50

731Alphabetical index
PRIUS PHV_OM_OM47A89E_(EE)
Hooks
Coat hooks ............................ 543
Grocery bag hook ................. 531
Retaining hooks (floor mat) ..... 30
Horn .......................................... 302
HV mode ..................................... 89
Hybrid battery
(traction battery) .................... 101
Air intake vent ....................... 102
Charging ............................... 113
Location ................................ 101
Specification.......................... 699
Status indicator ..................... 115
Hybrid battery (traction
battery) air intake vent .......... 102
Hybrid system ............................ 88
Brake Override System ......... 314
Consumption screen ..... 229, 260
Drive-Start Control ................ 314
Emergency shut off system... 102
Energy monitor.............. 218, 257
High voltage components ..... 101
Hybrid System Indicator ........ 221
If the hybrid system will not
start..................................... 676
Overheating .......................... 688
Plug-in hybrid system
precautions ......................... 101
Plug-in hybrid vehicle driving
tips ...................................... 108
Power switch ......................... 327
Regenerative braking .............. 97
Starting the hybrid system .... 327
Hybrid System Indicator ......... 221
Hybrid transmission ................ 333Identification ............................ 697
Engine................................... 698
Vehicle .................................. 697
Ignition switch
(power switch) ....................... 327
Auto power off function ......... 329
Changing the power switch
modes................................. 329
If your vehicle has to be
stopped in an emergency ... 633
Starting the hybrid system .... 327
Illuminated entry system ........ 524
Immobilizer system ................... 75
Indicators ................................. 199
Initialization .............................. 717
Intelligent Clearance
Sonar.................................. 453
Items to initialize ................... 717
Power windows ..................... 308
S-IPA (Simple Intelligent
Parking Assist System) ...... 481
Tire pressure warning
system ................................ 582
Inside rear view mirror ............ 304
Instrument cluster light
control .................................... 192
Intelligent Clearance Sonar .... 443
Interior lights............................ 522
Switch ........................... 523, 524
Wattage ................................ 705
Intrusion sensor ........................ 84
ISOFIX rigid anchors ................. 58I
*: Refer to the “Navigation system Owner’s manual”.