
492
PRIUS v_OM_OM47B23U_(U)
8-2. Steps to take in an emergency
If a warning light turns on or a warning
buzzer sounds
Calmly perform the following actions if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then
goes off, this does not necessarily indicate a malfunction in the
system. However, if this continues to occur, have the vehicle
inspected by your Toyota dealer.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
(U.S.A.)
(Canada)
Brake system warning light and warning buzzer (red
indicator)
*1
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer. Continuing to drive the vehi-
cle may be dangerous.
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
Brake system warning light (yellow indicator)
Indicates a malfunction in:
• The regenerative brake system; or
• The electronically controlled brake system
Have the vehicle inspected by your Toyota dealer
immediately.
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
(If equipped)
Low engine oil pressure warning light
Indicates that the engine oil pressure is too low
Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
(If equipped)
Hybrid system warning light (warning buzzer)
Indicates a malfunction in the hybrid system
Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.

4948-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
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 above systems and/or ABS
are operating.
(If equipped)
Parking lock system warnin g light (warning buzzer)
Indicates a malfunction in the shift control system
• In this situation, there is a possibility that the parking lock mechanism will not work. When parking, park the
vehicle on a flat surface and apply the parking brake
securely.
• The power switch may not be turned off. If this happens, applying the parking brake will enable the switch to be
turned off.
Have the vehicle inspected by your Toyota dealer
immediately.
(If equipped)
Parking lock system warnin g message (warning buzzer)
Indicates a malfunction in the shift control system when
the vehicle is stopped
• In this situation, there is a possibility that the parking
lock mechanism will not work. When parking, park the
vehicle on a flat surface and apply the parking brake
securely.
• The power switch may not be turned off. If this happens, applying the parking brake will enable the switch to be
turned off.
Have the vehicle inspected by your Toyota dealer
immediately.
(If equipped)
LED headlight warning light
Indicates a malfunction in the LED headlights The LED headlights will not normally illuminate when
there is a malfunction, however they may be able to illu-
minate depending on the nature of the problem.
Have the vehicle inspected by your Toyota dealer
immediately.
Warning lightWarning light/Details/Actions

5008-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
WARNING
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Toyota
dealer. The vehicle will become extrem ely unstable during braking, and the
ABS system may fail, which could cause an accident resulting in death or
serious injury.
■ When the electric power steerin g system warning light comes on
The steering wheel may become extremely heavy.
When steering wheel operations are heavier than usual, grip the steering
wheel firmly and operate it using more force than usual.
■
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could
cause a loss of vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire
inflation pressure immediately.
●If the tire pressure warning light comes on even after tire inflation pres-
sure adjustment, it is probable that you have a flat tire. Check the tires.
If a tire is flat, change it with th e spare tire and have the flat tire
repaired by the nearest Toyota dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate,
you could lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

506
PRIUS v_OM_OM47B23U_(U)
8-2. Steps to take in an emergency
If a war ning message is displayed
Master warning light
The master warning light also
comes on or flashes in order to
indicate that a message is cur-
rently being displayed on the
multi-information display.
Multi-information display
If any of the warning lights come on again after the following actions
have been performed, contact your Toyota dealer.
: If equipped
If a warning is shown on the multi-information display, stay calm
and perform the following actions:
1
2

5118-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
Warning messageDetails/Actions
(If equipped)
The Automatic High Beam switch was pressed
with the low beam headlights turned on.
Turn the high beam headlights on before
pressing the Automatic High Beam switch.
(If equipped)
Indicates that, since the VSC (Vehicle Stability
Control) system was turned off, the pre-collision
brake system operation is stopped
Turn the VSC on. ( P. 251)
(If equipped)
Indicates that the pre-collision system is not cur-
rently functional
Check the grille cover and the sensor and
clean them if they are dirty.
Hybrid battery (traction battery) inspection or
replacement time.
Have the hybrid battery (traction battery)
inspected by your Toyota dealer immedi-
ately.
Hybrid system restarting will soon be disabled.
If you continue to use the vehicle in this
state, you will soon become unable to
restart the hybrid system. Have the hybrid
battery (traction battery) inspected by your
Toyota dealer immediately.
Indicates that restarting of the hybrid system is
not possible.
Contact your Toyota dealer immediately.
(Flashes)

5158-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
Shift control system communication malfunctionA buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
• The hybrid system may not be able to start.
• May not be switched to the P position.
When parking, choose a level location and
apply the parking brake securely.
• The automatically P position selection func-
tion ( P. 186) may not function. Before
turning the power switch off, securely press
the P position switch, and be sure to check
that the shift position is in P by verifying the
shift position or P position switch operation
indicator lights.
• The power switch may not be able to be turned off. In this case, the power switch
may be turned off by applying the parking
brake.
(If equipped)
Indicates a malfunction in the LED headlight sys-
temA buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
Warning messageDetails/Actions
(Turns on or
Flashes)

607Alphabetical index
PRIUS v_OM_OM47B23U_(U)
AntennaSmart key system ................. 130
Radio .................................... 292
Anti-lock brake system (ABS) ...................................... 248
Function ................................ 248
Warning light ......................... 493
Approach warning ................... 221
Armrest ..................................... 389
Assist grips .............................. 390
Audio input............................... 277
Audio system
(Entune Audio) ...................... 273Antenna ................................ 292
Audio input ............................ 277
AUX port ............................... 309
Basic operations ................... 278
Bluetooth
® audio................... 321
CD player .............................. 293
iPod....................................... 299
MP3/WMA disc ..................... 293
Optimal use........................... 290
Portable music player ........... 277
Radio .................................... 291
Steering wheel audio switches.............................. 276
USB memory ........................ 304
Audio system (Entune Premium Audio with Navigation)
*
Automatic air conditioning systemAir conditioning filter ............. 460
Automatic air conditioning system ......... ....................... 366 Automatic door locking
and unlocking systems ........ 123
Automatic headlight leveling system ..................... 194
Automatic High Beam ............. 196
Automatic light control
system.................................... 194
AUX port ................................... 277
Auxiliary boxes ................ 382, 384
Back door ................................. 125
Back-up lights Replacing light bulbs ............ 479
Wattage ................................ 562
Battery (12-volt battery) Battery checking ................... 442
If the 12-volt battery is
discharged.......................... 541
Preparing and checking
before winter ...................... 265
Warning light......................... 492
Battery (traction battery) .......... 78
Bluetooth
®............................... 352
Audio system ....... ................. 321
Hands-free system (for cellular phone) ............. 323
Registering/removing a Bluetooth
® device ........... 315
Selecting a Bluetooth®
device ................................. 317
Wireless communication....... 310
B
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

609Alphabetical index
PRIUS v_OM_OM47B23U_(U)
Child-protectors....................... 123
CleaningAluminum wheels.................. 409
Exterior ................................. 408
Interior................................... 412
Panoramic roof ..................... 411
Radar sensor ................ 228, 260
Seat belts .............................. 413
Climate remote control ........... 373
Clock ................................... 92, 388
Condenser ................................ 436
Console box ............................. 379
Coolant Capacity ................................ 559
Checking ............................... 434
Preparing and checking before winter....................... 265
Cooling system ........................ 434 Hybrid system overheating......................... 546
Consumption screen ............... 108
Cruise control Cruise control........................ 212
Dynamic radar cruise
control................................. 216
Warning messages ............... 509
Cup holders.............................. 380
Curtain shield airbags ............... 41
Customizable features ............ 577 Daytime running light
system.................................... 194
Defogger Outside rear view mirrors ..... 368
Rear window ......................... 368
Windshield ............................ 368
Dimension ................................ 554
Dinghy towing.......................... 173
Display Drive information .................. 102
Dynamic radar cruise control ................................ 216
Energy monitor ............. 102, 108
LDA (Lane Departure Alert)................................... 229
Multi-information display ....... 100
Trip information....................... 94
Warning messages ............... 506
Do-it-yourself maintenance .... 422
Door courtesy lights ............... 375 Location ................................ 375
Wattage ................................ 562D