engine coolant TOYOTA PRIUS 2017 4.G User Guide

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8-2. Steps to take in an emergency
If you think something is wrong
●Fluid leaks under the vehicle
(Water dripping from the air co nditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● High coolant temperature warning light flashes or comes on
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the hybrid system
● Engine missing, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spon gy feeling, pedal almost touches
the floor
If you notice any of the follow ing symptoms, your vehicle proba-
bly needs adjustment or repair. Contact your Toyota dealer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

6558-2. Steps to take in an emergency
PRIUS_OM_OM47B54U_(U)
8
When trouble arises
Slip indicator lightIndicates a malfunction in:
• The VSC system;
• The TRAC system; or
• The hill-start assist control system
→ Have the vehicle inspected by your Toyota dealer
immediately.
The light will flash when the ABS, VSC or TRAC system is
operating.
High coolant temperat ure warning light
• When the light flashes:
Indicates that the engine coolant temperature is too high
The light changes from a flashing to a solid light when
the temperature further increases
→ Immediately stop the vehicle in a safe place. ( →P. 714)
• When the light comes on without flashing: Indicates a malfunction in the exhaust heat recirculator
system
→ Have the vehicle inspected by your Toyota dealer
immediately.
(Flashes)
(If equipped)
ICS OFF indicator
Indicates a malfunction in the Intelligent Clearance Sonar
function
→ Have the vehicle inspected by your Toyota dealer.
The warning light will operate as follows, even when the
system is not malfunctioning:
• The light will come on when the Intelligent Clearance Sonar function is turned off ( →P. 346)
• The light will come on when the Intelligent Clearance Sonar function is operating ( →P. 350)
• The light will flash when the system cannot be temporar- ily used ( →P. 354)
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 1.7 gal.
(6.4 L, 1.4 Imp.gal.) or less
→ Refuel the vehicle.
Warning lightWarning light/Details/Actions

7178-2. Steps to take in an emergency
PRIUS_OM_OM47B54U_(U)
8
When trouble arises
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system again and check if “Hybrid System
Overheated” is shown on the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the message is not displayed:
The hybrid system temperature has dropped and the vehicle may
be driven normally.
However, if the message appears again frequently, contact your Toyota
dealer.
WARNING
■ To prevent an accident or injury 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 “Accessory”,
“Ignition ON” or mileage display ( →P. 108) on the main display and the
“READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fans 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 caps while the hybrid system and radi-
ator are hot.
High temperature steam or coolant could spray out.
6

7188-2. Steps to take in an emergency
PRIUS_OM_OM47B54U_(U)
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently.
Adding cool coolant to a hot hybrid system too quickly can cause damage to
the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
● Do not use any coolant additive.

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9-1. Specifications
*: The coolant capacity is a reference quantity.If replacement is necessary, contact your Toyota dealer.
Cooling system
Capacity*
Gasoline
engine6.3 qt. (6.0 L, 5.3 Imp.qt.)
Power
control unit1.5 qt. (1.4 L, 1.2 Imp.qt.)
Coolant type
Use either of the following: • “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-silicate, non-amine, non-
nitrite, and non-borate coolant with
long-life hybrid organic acid technology
Do not use plain water alone.
Ignition system (spark plug)
MakeDENSO FC16HR-C9
Gap0.035 in. (0.9 mm)
NOTICE
■ Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system (12-volt battery)
Open voltage at 68 °F (20 °C):
12.5 V or higher: Fully charged
11.0 — 12.4 V: Half charged
10.9 V or lower: Discharged
(Voltage is checked 30 seconds after the
hybrid system and all lights are turned off.)
Charging rates5 A max.

742
PRIUS_OM_OM47B54U_(U)
9-1. Specifications
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation
pressure
Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than 1 mile or 1.5 km under
that condition
Maximum inflation
pressureThe maximum cold inflated pressure to which
a tire may be inflated, shown on the sidewall
of the tire
Recommended
inflation pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those stan-
dard items which may be replaced) of auto-
matic transmission, power steering, power
brakes, power windows, power seats, radio
and heater, to the extent that these items are
available as factory-installed equipment
(whether installed or not)
Curb weight
The weight of a motor vehicle with standard
equipment, including the maximum capacity of
fuel, oil and coolant, and if so equipped, air
conditioning and additional weight optional
engine
Maximum loaded
vehicle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant
weight150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
*
that follows
Occupant distributionDistribution of occupants in a vehicle as speci-
fied in the third column of Table 1
* below

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
N
O
P

794Alphabetical index
PRIUS_OM_OM47B54U_(U)
Warning buzzersBlind Spot Monitor (BSM) ..... 320
Brake system ....... ................. 653
Downshifting ......................... 236
Lane departure alert ............. 288
Open door ..................... 169, 655
Open moon roof .................... 204
Parking assist sensors ............... 333, 344, 357
Pre-collision warning............. 275
Radar cruise control.............. 307
Seat belt reminder ................ 656
Warning lights ABS....................................... 654
Brake Override System......... 656
Brake system ....... ................. 653
Charging system ................... 653
Drive-Start Control ................ 656
Driver’s seat belt reminder ............................. 656
Electronic engine control system ......... ....................... 653
Electric power steering ......... 654
Front passenger’s seat
belt reminder ...................... 656
High coolant temperature ..... 655
ICS OFF indicator ................. 655
Intelligent Clearance Sonar .................................. 656
LDA system .......................... 657
Low engine oil pressure ........ 653
Low fuel level ........................ 655
Malfunction indicator lamp .... 653
Master warning light.............. 656
Open door ............................. 655
PCS ...................................... 654
Rear passengers’ seat belt
reminder light...................... 656
Seat belt reminder light ......... 656
Slip indicator ......................... 655
SRS ...................................... 654
Tire pressure......................... 656 Warning messages.................. 663
Warning reflector..................... 534
Washer
Checking............................... 602
Preparing and checking before winter ...................... 412
Switch ........................... 254, 260
Washing and waxing ............... 566
Water-repellent coating .......... 567
Weights Cargo capacity...................... 222
Load limits ............................ 722
What to do if... (Troubleshooting) ................. 774
Wheels ...................................... 617 Replacing wheels ................. 670
Size....................................... 730
Window glasses ...................... 198
Window lock switch ................ 198
Windows Power windows..................... 198
Rear window defogger.......... 515
Washer ......................... 254, 260
Windshield wipers ................... 254 Handling the wiper arms ....... 571
Winter driving tips ................... 412
Wiper rubber replacement ...... 623
Wireless charger ..................... 542
Wireless communication ........ 455
Wireless remote control key .......................................... 160 Locking/Unlocking ................ 160
Panic mode........................... 161
Replacing the battery............ 627
WMA disc ................................. 438
W