Page 455 of 568

4557-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
After taking the specified steps to correct the suspected problem, 
check that the smart entry & start system warning light or the smart 
entry & start system indicator light turn off.
Follow the correction procedures. (vehicles without multi-infor- 
mation display)
Interior 
buzzer
Exterior
buzzer
Warning 
lightWarning light/DetailsCorrection 
procedure
Continuous Continuous
(Flashes in  yellow)
Smart entry & start 
system warning light 
The electronic key was
carried outside the 
vehicle and the 
driver’s door was
opened and closed 
while any shift posi- 
tion other than P was
selected without turn- 
ing off the power 
switch. 
• Change the 
shift position to 
P.
• Bring the elec- 
tronic key back 
into the vehicle.
Once3 times
(Flashes in  yellow)
Smart entry & start 
system warning light 
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 or bring 
the electronic key 
back into the vehi-
cle. 
     
        
        Page 456 of 568

4567-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
Once3 times
(Flashes in  yellow)
Smart entry & start 
system warning light
Indicates that a door 
other than the driver’s 
door has been opened
and closed with the 
power switch in any 
mode other than off
and the electronic key 
outside of the detec- 
tion area.
Confirm the loca-
tion of the elec- 
tronic key.
OnceContinuous  
(5 seconds)(Flashes in  yellow)
Smart entry & start 
system warning light 
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.
Once(Flashes in  yellow for 15 seconds)
Smart entry & start 
system warning light
Indicates that the elec- 
tronic key is not pres- 
ent when attempting to
start the engine.
Confirm the loca-
tion of the elec- 
tronic key.
9 times
(Flashes in  yellow)
Smart entry & start 
system warning light 
An attempt was made
to drive when the regu- 
lar key was not inside 
the vehicle.
Confirm that the
electronic key is 
inside the vehicle.
Interior
buzzer
Exterior
buzzer
Warning 
lightWarning light/DetailsCorrection 
procedure 
     
        
        Page 457 of 568

4577-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
Once(Flashes in  yellow for 15 seconds)
Smart entry & start 
system warning light
Indicates that the elec- 
tronic key battery is 
low.
Replace the bat- 
tery. ( P. 417)
Once(Flashes in  yellow for 15 seconds)
Smart entry & start 
system warning light
Indicates a malfunction
in the smart entry & 
start system.
Have the vehicle
inspected by any 
authorized Toyota
retailer or Toyota
authorized 
repairer, or any 
reliable repairer.
Once(Flashes in  yellow for 30 seconds)
Smart entry & start 
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.
Interior 
buzzer
Exterior
buzzer
Warning 
lightWarning light/DetailsCorrection 
procedure 
     
        
        Page 473 of 568

4737-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
Interior 
buzzer
Exterior
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.
Contin-
uous
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.
Contin- 
uous
Contin-
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)
(Displayed alternately) 
(Flashes)
(Flashes) 
     
        
        Page 474 of 568
4747-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
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
buzzer
Exterior
buzzerWarning messageDetails/Actions
(Flashes)
(Displayed alternately) 
(Flashes) 
     
        
        Page 475 of 568

4757-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
Once
Sounds 
once for 5
seconds
• An attempt was made to lock
the doors using the smart
entry & start system while the 
electronic key was still inside 
the vehicle.
• 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 by 
pulling on the outside door
handle 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 
buzzer
Exterior
buzzerWarning messageDetails/Actions
(Flashes)
(Flashes) 
     
        
        Page 476 of 568
4767-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
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.  5 1 1 ) ,  t h e 
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. 417)
Interior 
buzzer
Exterior
buzzerWarning messageDetails/Actions
(Flashes)
(Flashes) 
     
        
        Page 509 of 568

5097-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
If the hybrid system will not start
One of the following may be the cause of the problem: 
● The electronic key may not be functioning properly.* (P.  5 1 1 ) 
● There may not be sufficient fuel in the vehicle’s tank. 
Refuel the vehicle. ( P.  8 7 ) 
● There may be a malfunction in the immobilizer system.* (P.  9 1 ) 
● There may be a malfunction in the shift control system.*  
( P. 229, 447, 460) 
● 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. 510)
*: 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. 513) 
● The 12-volt battery terminal connections may be loose or corroded.  
( P. 389)
Reasons for the hybrid system not starting vary depending on 
the situation. Check the following and perform the appropriate 
procedure: 
The hybrid system will not start even though the correct starting 
procedure is being followed. ( P. 224)
The interior lights and headlights are dim, or the horn does not 
sound or sounds at a low volume.