overheating TOYOTA PRIUS 2017 4.G Owners Manual

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PRIUS_OM_OM47B54U_(U)
2. Instrument cluster
■BSM (Blind Spot Monitor) outsid e rear view mirror indicators
(if equipped) ( →P. 320)
• When the BSM function is enabled on the screen of the multi-infor- mation display, the power switch is turned to ON mode.
If the system is functioning correctly, the BSM outside rear view mirror indi-
cators will turn off after a few seconds.
If the BSM outside rear view mirror indicators do not illuminate or do not
turn off, there may be a malfunction in the system.
If this occurs, have the vehicle inspected by your Toyota dealer.
●
Indicators are also displayed on the out-
side rear view mirrors.
● In order to confirm operation, the BSM
outside rear view mirror indicators illumi-
nate in the following situations:
• When the power switch is in ON
mode, the BSM function is enabled
on the screen of the multi-infor-
mation display.
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 r\
esult
in death or serious injury. Have the vehicle inspected by your Toyota dealer
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. 714)

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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.

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PRIUS_OM_OM47B54U_(U)
4-2. Driving procedures
4
Driving
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. 208
■ 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 3 mph [5 km/h]).
■ Usage in winter time
→P. 412
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.

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PRIUS_OM_OM47B54U_(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 and VSC systems
After turning the TRAC and VSC systems off, the systems will be automati-
cally re-enabled in the following situations:
● When the power switch is turned off
● If only the TRAC system is turned off, the TRAC will turn on when vehicle
speed increases
If both the TRAC and VSC systems are turned off, automatic re-enabling will
not occur when vehicle speed increases.
■ Electric power steering system warning light (warning buzzer)
→P. 654
■ 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

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6-1. Using the air conditioning system and defogger
6
Interior features
Seat heaters∗
∗: If equipped
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.

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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. 655) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle s peed does not increase.)
● “Hybrid System Overhe ated” is shown on the multi-information
display.
● Steam comes out from under the hood.
Correction procedures
1
2
3
1
2

781Alphabetical index
PRIUS_OM_OM47B54U_(U)
Child-protectors....................... 168
CleaningAluminum wheels.................. 567
Camera sensor ..................... 271
Exterior ................................. 566
Interior................................... 572
Radar sensor ........................ 270
Seat belts .............................. 574
Water-repellent coating......... 567
Coat hooks ............................... 550
Combination meter .................... 92 Clock adjustment .................... 97
Main display .......................... 107
Multi-information display ....... 114
Warning lights and indicators ............................ 100
Condenser ................................ 596
Console box ............................. 527
Coolant Capacity ................................ 728
Checking ............................... 594
Preparing and checking before winter....................... 412
Cooling system ........................ 594 Hybrid system overheating......................... 714
Consumption screen ............... 153
Cruise control
Cruise control........................ 313
Dynamic radar cruise control with full-speed
range .................................. 298
Cup holders.............................. 528
Curtain shield airbags ............... 36
Customizable features ............ 748 Daytime running light
system.................................... 245
Deck board ............................... 531
Defogger Outside rear view mirrors ..... 515
Rear window ......................... 515
Windshield ............................ 515
Dimension ................................ 722
Dinghy towing.......................... 224
Display BSM (Blind Spot Monitor) ..... 320
Drive information .................. 116
Dynamic radar cruise control with full-speed range .......... 298
Energy monitor ............. 117, 153
Head-up display.................... 146
LDA (Lane Departure Alert with steering control) .......... 292
Multi-information display ....... 114
Parking assist system ....... ................. 334, 361
Pre-collision warning ............ 275
Trip information..................... 109
Warning messages ............... 663
Do-it-yourself maintenance .... 584
Door courtesy lights ............... 523 Location ................................ 523
Wattage ................................ 732D

783Alphabetical index
PRIUS_OM_OM47B54U_(U)
If you have a flat tire ............. 670
If you lose your keys ..... 161, 164
If you think something is wrong .............................. 652
If your vehicle becomes
stuck ................................... 719
If your vehicle has to be stopped in an
emergency.......................... 645
If your vehicle needs to be towed .................................. 646
If your vehicle overheats ....... 714
Energy monitor ................ 117, 153
Engine Accessory mode ................... 227
Compartment ........................ 590
Engine switch........................ 225
Exhaust gas precautions ........ 56
Hood ..................................... 587
How to start the hybrid system ......... ....................... 225
Identification number ............ 724
If the hybrid system will not start .............................. 703
If your vehicle has to be stopped in an
emergency.......................... 645
Ignition switch (power switch) .................... 225
Overheating .......................... 714
Power switch......................... 225 Engine coolant
Capacity................................ 728
Checking............................... 594
Preparing and checking before winter ...................... 412
Engine oil Capacity................................ 726
Checking............................... 591
Oil pressure warning light ..... 653
Preparing and checking before winter ...................... 412
Engine switch .......................... 225 Auto power off function ......... 227
Changing the power switch modes ..................... 227
If your vehicle has to be stopped in an
emergency ......................... 645
Starting the hybrid system .... 225
EPS
(Electronic Power Steering) Function ................................ 402
Warning light......................... 654
EV indicator ............................. 119
EV drive mode ......................... 231
Event data recorder (EDR) ........................................ 11
Exhaust gas precautions .......... 56

785Alphabetical index
PRIUS_OM_OM47B54U_(U)
High coolant temperature
warning light .......................... 655
High mounted stoplight Replacing .............................. 641
Hill-start assist control............ 403
Hood ......................................... 587
Hooks Cargo hooks ......................... 532
Coat hooks............................ 550
Grocery bag hook ................. 533
Retaining hooks (floor mat)..... 26
Horn .......................................... 192
Hybrid battery (traction battery) Location .................................. 82
Specification ......................... 725
Hybrid battery (traction battery)
air intake vent .......................... 83
Hybrid system ............................ 78 Brake Override System......... 209
Drive-Start Control ................ 210
Emergency shut off system ......... ......................... 83
Energy monitor/consumption
screen......................... 117, 153
EV drive mode ...................... 231
High voltage components ....... 82
Hybrid System Indicator........ 119
Hybrid system precautions ..... 82
Hybrid vehicle driving tips ..... 409
If the hybrid system will not start .............................. 703
Overheating .......................... 714
Power switch......................... 225
Regenerative braking.............. 80
Starting the hybrid system .... 225
Vehicle proximity notification system ................ 79
Hybrid System Indicator ......... 119
Hybrid transmission ................ 234 I/M test ...................................... 583
Identification
Engine .................................. 724
Vehicle .................................. 723
Ignition switch
(Power switch)....................... 225 Auto power off function ......... 227
Changing the power switch modes ..................... 227
If your vehicle has to be stopped in an
emergency ......................... 645
Starting the hybrid system .... 225
Illuminated entry system ........ 525
Immobilizer system ................... 89
Indicators ................................. 100
Initialization
Intelligent Clearance Sonar.................................. 354
Items to initialize ................... 756
Maintenance data ................. 578
Moon roof ............................. 204
Power windows..................... 199
S-APGS (Simple Advanced
Parking Guidance
System) .............................. 382
Tire pressure warning
system .......... ...................... 607
Inside rear view mirror ............ 194
Instrument cluster light control ...................................... 94
Intelligent Clearance Sonar .... 344
Interior lights ........................... 523 Switch ........................... 524, 525
Wattage ................................ 732
Intuitive parking assist ........... 333I

788Alphabetical index
PRIUS_OM_OM47B54U_(U)
Navigation system*
Noise from under vehicle............ 8
Odometer.................................. 109
OilEngine oil .............................. 726
Opener
Fuel filler door ....................... 264
Hood ..................................... 587
Outside rear view mirrors ....... 196
Adjustment ............................ 196
Blind Spot Monitor ................ 320
Folding .................................. 196
Outside rear view mirror defoggers ........................... 515
Outside temperature
display .................................... 108
Overhead console ................... 530
Overheating.............................. 714
Overheating, Engine................ 714 P position switch ..................... 235
Panic mode .............................. 161
Parking assist sensors
Intelligent Clearance Sonar.................................. 344
Intuitive parking assist .......... 333
S-APGS (Simple Advanced Parking Guidance
System) .............................. 357
Parking brake Operation .............................. 241
Parking brake engaged
warning buzzer ................... 241
Parking lights
Light switch ........................... 242
Replacing light bulbs .... 637, 641
Wattage ................................ 732
Parking lock ............................. 235
PCS (Pre-Collision System) Enabling/disabling the
system .......... ...................... 279
Function ................................ 275
Warning light......................... 654
Personal lights......................... 523 Switch ................................... 524
Wattage ................................ 732
Power control unit coolant
Capacity................................ 728
Checking............................... 594
Preparing and checking before winter ...................... 412
Radiator ................................ 596
Power outlets ........................... 541
Power steering (Electric
Power Steering system) ....... 402 Warning light......................... 654
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