Page 505 of 624
5058-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
Once(Flashes in
yellow for 15 seconds)
Smart key system
warning light
Indicates that the elec-
tronic key battery is
low.
Replace the bat-
tery. (P. 464)
Once(Flashes in
yellow for 15 seconds)
Smart key system
warning light
Indicates a malfunc-
tion in the smart key
system.Have the vehicle
inspected by your
Toyota dealer
immediately.
Once(Flashes in
yellow for 30 seconds)
Smart key system
warning light
• When the doors were
unlocked with the
mechanical key and
then the power switch
was pressed, the elec-
tronic key could not be
detected in the vehicle.
• The electronic key could not be detected
in the vehicle even
after the power switch
was pressed two con-
secutive times.
Touch the elec-
tronic key to the
power switch
while depressing
the brake pedal.
InteriorbuzzerExterior buzzerWarning lightWarning light/DetailsCorrection procedure
Page 506 of 624
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
Page 507 of 624

5078-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
Warning message and warning buzzer list
Warning messageDetails/Actions
(If equipped)
Indicates that:
• There is a high possibility of a frontal collision;
or
• The pre-collision braking function is operatingA buzzer also sounds.
Slow the vehicle by applying the brakes.
(If equipped)
Indicates that your vehicle is nearing the vehicle
ahead (in vehicle-to-vehicle distance control
mode)
A buzzer also sounds.
Slow the vehicle by applying the brakes.
(If equipped)
Indicates that the (when LDA control is operating)
Lane Departure Alert
When the vehicle deviates from its lane, the line
on the side the vehicle deviates from flashes
amber.
A buzzer also sounds.
After checking the safety of the surround-
ings, operate the steering wheel and return
the vehicle to within the lane.
Indicates that the accelerator pedal is depressed
while the shift position is in N
A buzzer also sounds.
Release the accelerator pedal and shift the
shift position to D or R.
Indicates that the accelerator pedal is depressed
to stop the vehicle on an upward slope etc.
A buzzer also sounds. If this continues, the
hybrid system may overheat.
Release the accelerator pedal and depress
the brake pedal.
(Flashes)
(Flashes)
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5088-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
Indicates that the hybrid battery (traction battery)
power has dropped because a long period of time
has elapsed after shifting the shift position to NA buzzer also sounds.
Restart the hybrid system when starting
the vehicle.
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. Also, it may
not be possible to turn the power switch off. If
this happens, applying the parking brake will
enable the switch to be turned off. A buzzer
also sounds.
Have the vehicle inspected by your Toyota
dealer.
Indicates a malfunction in the hybrid system
A buzzer also sounds.
Immediately stop the vehicle in a safe place
and contact your Toyota dealer.
Indicates that the hybrid battery (traction battery)
is low A buzzer also sounds.
When stopping the vehicle for a long
period of time, shift the shift position to P.
The battery cannot be charged with the
shift position in N.
(If equipped)
Indicates that the radar cruise control sensor is
dirty or covered with ice
A buzzer also sounds.
Clean the sensor.
Warning messageDetails/Actions
(Flashes)
(Flashes)
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5098-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
(If equipped)
Indicates that the dynamic radar cruise control
system is unable to judge vehicle-to-vehicle dis-
tanceA buzzer also sounds.
If the windshield wipers are on, turn them
off or set them to either intermittent or slow
mode.
(If equipped)
Indicates a malfunction in:
• The cruise control system; or
• The dynamic radar cruise control system
Press the “ON-OFF” button once to deactivate
the system, and then press the button again to
reactivate the system.
A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
(If equipped)
Indicates that the LDA malfunction
A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
(If equipped)
Indicates that the LDA temporarily stops (temper-
ature of white camera sensor is higher than oper-
ation range)
A buzzer also sounds.
Restart the LDA after driving for a while
(If equipped)
Indicates a malfunction in the pre-collision sys-
tem
A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer immediately.
Warning messageDetails/Actions
(Flashes)
Page 510 of 624

5108-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s ManualSupplement” for the maintenance interval applicable to your vehicle.
Indicates an engine oil pressure malfunction A buzzer also sounds.
Immediately stop the vehicle in a safe place
and contact your Toyota dealer.
Indicates that the hybrid system has overheated This message may be displayed when driving
under severe operating conditions, and the out-
put of the hybrid system may temporarily
decrease in order to protect the system. (For
example, when driving up a long steep hill or
driving up a steep hill in reverse.)
A buzzer also sounds.
Stop and check. ( P. 546)
(If equipped)
Indicates a malfunction in the Automatic High
Beam
A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
(U.S.A. only)
Indicates that all maintenance according to the
driven distance on the maintenance schedule
*
should be performed soon.
Comes on approximately 4500 miles (7200 km)
after the message has been reset.
If necessary, perform maintenance.
(U.S.A. only)
Indicates that all maintenance is required to cor-
respond to the driven distance on the mainte-
nance schedule
*.
Comes on approximately 5000 miles (8000 km)
after the message has been reset. (The indica-
tor will not work properly unless the message
has been reset.)
Perform the necessary maintenance.
Please reset the message after the mainte-
nance is performed. ( P. 416)
Warning messageDetails/Actions
Page 511 of 624

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)
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5128-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
An attempt was made to change the shift position
when the 12-volt battery voltage was low. A buzzer also sounds.
Maintain the hybrid system operation state
for approximately 15 minutes or more to
recharge the 12-volt battery.
The hybrid system will not start: Start the
hybrid system by following the “If the
12-volt battery is discharged” procedure
(P. 541).
The message appears frequently: The
12-volt battery may be deteriorating.
The 12-volt battery may be discharged if
this continues. Have the 12-volt battery
inspected at your Toyota dealer.
The shift lever and P position switch were repeat-
edly operated in quick succession.
A buzzer also sounds.
Wait approximately 20 seconds and change
the shift position.
An attempt was made to change the shift position
to B when the shift position was P or N.
A buzzer also sounds.
Change the shift position to D, and then
change the shift position to B.
An attempt was made to change the shift position
to R, D or B with the power switch on (READY
indicator turned off).
A buzzer also sounds.
After starting the hybrid system, change
the shift position to R, D or B
*.
*: When changing the shift position to B, first
change the shift position to D, and then
change the shift position to B.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)