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 519 of 624

5198-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
InteriorbuzzerExterior buzzerWarning messageDetails/Actions
Power was turned off due to the
automatic power off function.
Next time when starting
the hybrid system, oper-
ate the hybrid system for
approximately 5 minutes
to recharge the 12-volt bat-
tery.
Con-
tinu-
ous The driver’s door was opened
while any shift position other
than P was selected without
turning off the power switch.
Shift the shift position to P.
Con-
tinu-
ousContin-
uous
The electronic key was carried
outside the vehicle and the
driver’s door was opened and
closed while any shift position
other than P was selected with-
out turning off the power switch.
Shift the shift position to P.
Bring the electronic key
back into the vehicle.
Once An attempt was made to start
the hybrid system without the
electronic key being present, or
the electronic key was not func-
tioning normally.
Start the hybrid system
with the electronic key
present.
An attempt was made to drive
when the regular key was not
inside the vehicle.
Confirm that the elec-
tronic key is inside the
vehicle.
(Flashes)
(Flashes)
(Flashes)
Page 520 of 624
5208-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
Once3 times
The electronic key was carried
outside the vehicle and a door
other than the driver’s door was
opened and closed while the
power switch was in a mode
other than off.
Bring the electronic key
back into the vehicle.
The electronic key was carried
outside the vehicle and the
driver’s door was opened and
closed while the shift position P
was selected without turning off
the power switch.
Turn the power switch off.
Bring the electronic key
back into the vehicle.
Once
Sounds
once for
5
seconds
An attempt was made to exit
the vehicle with the electronic
key and lock the doors without
first turning the power switch
off.
Turn the power switch off
and lock the doors again.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Displayed alternately)
(Flashes)
Page 521 of 624
5218-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
Once
Sounds
once for
5
seconds
• An attempt was made to lockthe doors using the smart key
system while the electronic
key was still inside the vehi-
cle.
• An attempt was made to lock either front door by opening a
door and putting the inside
lock button into the lock posi-
tion, then closing the door
with the electronic key still
inside the vehicle.
Retrieve the electronic key
from the vehicle and lock
the doors again.
Once
• 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 consecu-
tive times.
Touch the electronic key to
the power switch while
depressing the brake
pedal.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
Page 522 of 624
5228-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
Once
The driver’s door was opened
and closed with the power
switch turned off and then the
power switch was put in
ACCESSORY mode twice with-
out the hybrid system being
started.
Press the power switch
while depressing the brake
pedal.
During a hybrid system starting
procedure in the event that the
electronic key was not function-
ing properly ( P. 539), the
power switch was touched with
the electronic key.
Press the power switch
within 10 seconds of the
buzzer sounding.
Once
An attempt was made to start
the hybrid system with the shift
position in N.
Shift the shift position to P
and start the hybrid sys-
tem.
Once
The electronic key has a low
battery.
Replace the electronic key
battery. ( P. 464)
Once
Indicates a malfunction in the
smart key system
Have the vehicle inspected
by your Toyota dealer.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
Page 537 of 624

537
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
8-2. Steps to take in an emergency
If the hybrid system will not star t
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly.
* ( P. 539)
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. ( P. 80)
● There may be a malfunction in the immobilizer system.
* ( P. 8 3 )
● There may be a malfunction in the shift control system.
*
( P. 179, 494, 508)
● The hybrid system may be malfunctioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. How-
ever, depending on the type of malfunction, an interim measure is
available to start the hybrid system. ( P. 538)
*: It may not be possible to shift the shift position other than P.
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 541)
● The 12-volt battery terminal con nections may be loose or corroded.
( P. 442)
Reasons for the hybrid system not starting vary depending on
the situation. Check the follo wing and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 174)
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.
Page 539 of 624

539
PRIUS v_OM_OM47B23U_(U)
8
When trouble arises
8-2. Steps to take in an emergency
If the electronic key does not operate
properly
Use the mechanical key (P. 11 7 )
in order to perform the following
operations:
Locks all the doors
Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again within 3 seconds
unlocks the other doors.
Ensure that the shift position is in P and depress the brake pedal.
Touch the Toyota emblem side
of the electronic key to the
power switch.
When the electronic key is
detected, a buzzer sounds and the
power switch will turn to ON mode.
When the smart key system is
deactivated in customization set-
ting, the power switch will turn to
ACCESSORY mode.
Firmly depress the brake pedal and check that the smart key sys-
tem indicator light (green) turns on (vehicles without multi-informa-
tion display) or is shown on the multi-information display
(vehicles with multi-information display).
If communication between the electronic key and vehicle is
interrupted ( P. 133) or the electronic key cannot be used
because the battery is depleted, the smart key system and
wireless remote control cannot be used. In such cases, the
doors can be opened and the hybr id system can be started by
following the procedure below.
Locking and unlocking the doors
1
2
Starting the hybrid system
1
2
3
Page 540 of 624

5408-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
Press the power switch.
In the event that the hybrid system still cannot be operated, contact
your Toyota dealer.
■ Stopping the hybrid system
Set the parking brake, shift the shift position to P and press the power switch
as you normally do when stopping the hybrid system.
■ Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
( P. 464)
■ Changing power switch modes
Release the brake pedal and press the power switch in step above.
The hybrid system does not start and modes will be changed each time the
switch is pressed. ( P. 177)
■ When the electronic key does not work properly
●Make sure that the smart key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features: P. 577)
● Check if battery-saving mode is set. If it is set, cancel the function.
( P. 133)
4
3