2018 TOYOTA PRIUS PLUG-IN HYBRID warning light

7188-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(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 retailer
or Toyota authorized repairer,
or any reliable repairer.
The following may indicate that your vehicle is overheating.
● The high coolant temperature warning light (P. 673) 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

752What to do if... (Troubleshooting)
PRIUS PHV_OM_OM47C99E_(EE)
●The seat belt reminder light is flashing
Are the driver and all the passengers wearing the seat belts? (P. 677)
●The parking brake indicator is on
Is the parking brake released? (P. 364)
Depending on the situation, other types of warning buzzer may also sound.
(P. 671, 680)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (P. 88)
To stop the alarm, turn the power switch to ON mode or start the hybrid sys-
tem.
●Is the electronic key left inside the vehicle?
Check the message on the multi-information display. (P. 680)
●When a warning light turns on or a warning message is displayed, refer to
P. 671, 680.
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
(vehicles with alarm)
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

754Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Alphabetical index
A/C............................................. 530
Air conditioning filter.............. 639
Automatic air conditioning
system ................................ 530
Blower customization ............ 534
Eco score (A/C score) ........... 247
Humidity sensor .................... 539
Remote Air Conditioning
System................................ 542
S-FLOW mode ...................... 532
ABS (Anti-lock Brake
System) .................................. 518
Function ................................ 518
Warning light ......................... 672
AHS (Adaptive High-beam
System) .................................. 369
Air conditioning filter .............. 639
Air conditioning system .......... 530
Air conditioning filter.............. 639
Automatic air conditioning
system ................................ 530
Blower customization ............ 534
Eco score (A/C score) ........... 247
Humidity sensor .................... 539
Remote Air Conditioning
System................................ 542
S-FLOW mode ...................... 532
Air intake vent .......................... 110
Airbag manual on-off
system ...................................... 51Airbags ....................................... 39
Airbag manual on-off
system .................................. 51
Airbag operating conditions .... 45
Airbag precautions for your
child ...................................... 41
Airbag warning light .............. 672
Correct driving posture ........... 32
Curtain shield airbag
operating conditions ............. 45
Curtain shield airbag
precautions........................... 43
General airbag precautions .... 41
Locations of airbags................ 39
Modification and disposal of
airbags.................................. 44
Side airbag operating
conditions ............................. 45
Side airbag precautions .......... 42
Side and curtain shield
airbags operating
conditions ............................. 45
Side and curtain shield
airbags precautions .............. 43
SRS airbags............................ 39
Alarm .......................................... 88
Alarm ...................................... 88
Intrusion sensor ...................... 91
Warning buzzer..................... 671
Anchor brackets ........................ 73
A

755Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Antenna (smart entry &
start system) .......................... 287
Anti-lock brake system
(ABS) ...................................... 518
Function ................................ 518
Warning light ......................... 672
Approach warning ................... 431
Assist grips .............................. 569
Audio input
*
Audio system*
Automatic air conditioning
system .................................... 530
Air conditioning filter.............. 639
Automatic air conditioning
system ................................ 530
Blower customization ............ 534
Eco score (A/C score) ........... 247
Humidity sensor .................... 539
Remote Air Conditioning
System................................ 542
S-FLOW mode ...................... 532
Automatic headlight leveling
system .................................... 367
Automatic light control
system .................................... 366
AUX port
*
Auxiliary boxes ........................ 555
Back door ................................. 282
Back-up lights .......................... 653
Replacing light bulbs ............. 654
Wattage................................. 735Battery (12-volt battery) .......... 599
Battery checking ................... 599
Exchanging ........................... 715
If the 12-volt battery is
discharged .......................... 712
Preparing and checking
before winter....................... 525
Replacing .............................. 715
Warning light ......................... 671
Battery (traction battery)......... 109
Air intake vent ....................... 110
Charging ............................... 121
Location ................................ 109
Specification ......................... 729
Status indicator ..................... 123
Blind Spot Monitor (BSM) ....... 442
Blind Spot Monitor function ... 450
Rear Crossing Traffic Alert
function ............................... 454
Bluetooth
®*
Bottle holders .......................... 554
Brake
Fluid ...................................... 734
Parking brake........................ 364
Regenerative braking............ 105
Warning light ......................... 671
Brake assist ............................. 518
Brake Override System ........... 338
Break-in tips ............................. 339
Brightness control
Instrument cluster light
control................................. 200
BSM (Blind Spot Monitor) ....... 442
Blind Spot Monitor function ... 450
Rear Crossing Traffic Alert
function ............................... 454
B
*: Refer to the “Navigation system Owner’s manual”.

757Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Child-protectors ....................... 280
Cleaning............................ 572, 577
Aluminum wheels .................. 573
Camera sensor ..................... 387
Exterior.................................. 572
Interior ................................... 577
Radar sensor ........................ 386
Seat belts .............................. 580
Water-repellent coating ......... 573
Clock ......................................... 198
Adjustment ............................ 204
Coat hooks ............................... 569
Combination meter .................. 198
Clock adjustment .................. 204
Main display .......................... 215
Multi-information display ....... 223
Warning lights and
indicators ............................ 207
Condenser ................................ 598
Console box ............................. 552
Consumption screen ............... 268
Coolant ..................................... 596
Capacity ................................ 732
Checking ............................... 596
Preparing and checking
before winter....................... 525
Cooling system ........................ 596
Engine overheating ............... 718
Hybrid system overheating ... 720
Cruise control .......................... 422
Dynamic radar cruise
control with full-speed
range .................................. 422
Cup holders .............................. 553
Curtain shield airbags ............... 39
Customizable features ............ 738Daytime running light
system .................................... 366
Deck board ............................... 556
Defogger
Outside rear view mirrors...... 535
Rear window ......................... 535
Windshield ............................ 535
Dimension ................................ 726
Display
BSM (Blind Spot Monitor) ..... 442
Drive information................... 225
Dynamic radar cruise
control with full-speed
range .................................. 422
Energy monitor ............. 226, 265
Head-up display .................... 257
Intelligent Clearance
Sonar.................................. 476
LDA (Lane Departure Alert
with steering control) .......... 411
Main display .......................... 215
Multi-information display ....... 223
Pre-crash warning................. 395
RSA (Road Sign Assist)........ 418
S-IPA (Simple Intelligent
Parking Assist System) ...... 487
Toyota parking assist
sensor................................. 460
Warning messages ............... 680
Do-it-yourself maintenance .... 586
Door courtesy lights................ 548
Location ................................ 548
Wattage ................................ 735D

758Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Doors ................................ 277, 282
Back door .............................. 282
Door glasses ......................... 330
Door lock ............................... 277
Open door warning buzzer.... 674
Open door warning light ........ 674
Outside rear view mirrors ...... 328
Rear door child-protectors .... 280
Side doors ............................. 277
Side windows ........................ 330
Double locking system.............. 87
Drive information ..................... 225
Drive-Start Control................... 338
Driver’s seat belt reminder
light ......................................... 674
Driving ...................................... 336
Break-in tips .......................... 339
Correct posture ....................... 32
Driving in the rain .................. 337
Driving mode select switch ... 437
Plug-in hybrid vehicle driving
tips ...................................... 116
Procedures............................ 336
Winter drive tips .................... 525
Dynamic radar cruise control
with full-speed range ............ 422
ECB (Electronically
Controlled Brake System) .... 518
Eco drive mode ........................ 437
Electric motor
(traction motor)........................ 96
Location .................................. 96
Specification.......................... 729Electric Power Steering
(EPS)....................................... 519
Function ................................ 519
Warning light ......................... 672
Electronic key .......................... 272
Battery-saving function ......... 289
If the electronic key does not
operate properly ................. 708
Replacing the battery ............ 646
Electronically Controlled
Brake System (ECB) ............. 518
Emergency, in case of
If a warning buzzer sounds ... 671
If a warning light turns on...... 671
If a warning message is
displayed ............................ 680
If the 12-volt battery is
discharged .......................... 712
If the electronic key does not
operate properly ................. 708
If the hybrid system will not
start .................................... 706
If you have a flat tire ............. 688
If you lose your keys ..... 273, 276
If you think something is
wrong.................................. 670
If your vehicle becomes
stuck ................................... 723
If your vehicle has to be
stopped in an emergency ... 663
If your vehicle needs to be
towed .................................. 664
If your vehicle overheats ....... 718
E

759Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Emergency brake signal ......... 519
Emergency flashers................. 662
Emergency brake signal ....... 519
Emergency tire puncture
repair kit ................................. 688
Energy monitor ................ 226, 265
Engine
Accessory mode ................... 353
Compartment ........................ 592
Engine switch ........................ 351
Exhaust gas precautions......... 50
Hood ..................................... 589
How to start the hybrid
system ................................ 351
Identification number............. 728
If the hybrid system will not
start..................................... 706
If your vehicle has to be
stopped in an emergency ... 663
Ignition switch
(power switch) .................... 351
Overheating .......................... 718
Power switch ......................... 351Engine coolant ......................... 596
Capacity ................................ 732
Checking ............................... 596
Preparing and checking
before winter....................... 525
Engine oil ................................. 593
Capacity ................................ 730
Checking ............................... 593
Oil pressure warning light ..... 672
Preparing and checking
before winter....................... 525
Engine switch .......................... 351
Auto power off function ......... 353
Changing the power switch
modes................................. 353
If your vehicle has to be
stopped in an emergency ... 663
Starting the hybrid system .... 351
EPS (Electronic Power
Steering)................................. 519
Function ................................ 519
Warning light ......................... 672
EV City mode switch ............... 100
EV driving range ...................... 119
EV mode ..................................... 97
EV/HV mode selection
switch ..................................... 100
Exhaust gas precautions .......... 50

760Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Flat tire ...................................... 688
Floor mats .................................. 30
Fluid
Brake..................................... 734
Transmission......................... 733
Washer.................................. 604
Fog lights.................................. 375
Replacing light bulbs ............. 658
Switch ................................... 375
Follow me home system ......... 366
Footwell lights.......................... 548
Front doors............................... 277
Front fog lights ........................ 375
Replacing light bulbs ............. 658
Switch ................................... 375
Front passenger’s seat belt
reminder light ........................ 674
Front position lights ................ 365
Light switch ........................... 365
Replacing light bulbs ............. 658
Front seats ............................... 318
Adjustment ............................ 318
Cleaning ................................ 577
Correct driving posture............ 32
Head restraints...................... 321
Seat heaters.......................... 546
Front turn signal lights............ 363
Replacing light bulbs ............. 658
Turn signal lever ................... 363
Fuel ........................................... 379
Capacity ................................ 728
Fuel gauge ............................ 215
Information ............................ 736
Refueling ............................... 379
Type ...................................... 728
Warning light ......................... 674Fuel consumption............ 237, 268
Average fuel consumption .... 237
Current fuel consumption...... 268
Fuel filler door.......................... 381
Opener .................................. 381
Refueling............................... 379
When the fuel filler door
cannot be opened............... 381
Fuses ........................................ 649
Glove box ................................. 552
Hands-free system
(for cellular phone)
*
Head restraints ........................ 321
Head-up display ....................... 257
Headlights ................................ 365
AHS (Adaptive High-beam
System) .............................. 369
Automatic headlight
leveling ............................... 367
Follow me home system ....... 366
Light switch ........................... 365
Replacing light bulbs............. 658
Heaters
Automatic air conditioning
system ................................ 530
Outside rear view mirrors...... 535
Seat heaters ......................... 546
High coolant temperature
warning light .......................... 673
High mounted stoplight
Replacing .............................. 658
High-voltage components ...... 109
Hill-start assist control............ 518
Hood ......................................... 589
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