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546
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
■If the tire pressure warning light frequently comes on after blinking
for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1
minute  when  the  “POWER”  switch is  turned  to  ON  mode,  have  it
checked by your Toyota dealer.
■Customization
The vehicle speed linked seat belt reminder buzzer can be disabled. 
(Customizable  features  oP.   6 4 7 )   H o w e v e r ,   To y o t a   r e c o m m e n d s   t h a t   t h e
seat belt reminder buzzer be operational to alert the driver and front passen-
ger when seat belts are not fastened.
CAUTION
■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  extremely  unstable  during  braking,  and  the
ABS  system  may  fail,  which  could  cause  an  accident  resulting  in  death  or
serious injury.
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If  the  steering  wheel  becomes  heavier  than  usual  when  operating,  hold
firmly and operate using more force than usual. 
         
        
        
     
        
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5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Warning messageDetailsCorrection 
procedure
(If equipped)
•Indicates that the pre-collision 
system is not currently func-
tional because the grille or the 
sensor is dirty.
•This message also appears 
when the pre-collision system 
is not functional due to over-
heating.
•Check the grille 
and the sensor and 
clean them if they 
are dirty. 
•In case of over-
heating, the system 
will become func-
tional once the sys-
tem cools down.
(Flashes)
(If equipped)
Indicates that the radar cruise 
control sensor is dirty or cov-
ered with ice.
Clean the sensor.
(Flashes)
(If equipped)
Indicates that the radar cruise 
control system is unable to 
judge vehicle-to-vehicle dis-
tance.
If the windshield 
wipers are on, turn 
them off or set 
them to either the 
intermittent or the 
slow mode. 
         
        
        
     
        
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When trouble arises
561
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Other displayed messages
Carrying out the corresponding action turns the message off.
*1:For EV mode operating conditions, see P. 40.
*2:If EV mode has been canceled because of insufficient hybrid battery (trac-
tion  battery)  charge,  a  warning  message  will  not  be  shown  on  the  multi-
information display and the buzzer will not sound.
Displayed messageDetailsCorrection 
procedure
EV mode cannot be switched 
to.*1
A buzzer also sounds.
The reason why EV mode 
cannot be used is shown 
(may not be shown in some 
instances.)
Use the EV mode 
when it becomes 
available.
*2
(Flashes 
3 times)
EV mode has been automati-
cally canceled.*1
A buzzer also sounds.*2
The reason why EV mode 
cannot be used is shown.
Use EV mode after 
making it avail-
able, for example 
by lowering the set 
temperature of the 
heater. 
         
        
        
     
        
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When trouble arises
563
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Have the malfunction repaired immediately.
After  taking  the  specified  steps  to correct the suspected problem,
check that the warning message and light turn off.
Interior
buzzer
Exterior
buzzerWarning messageDetailsCorrection 
procedure
Once 
(Comes on for 15 seconds.)
(Flashes)
The electronic 
key is not 
detected when 
attempting to 
start the hybrid 
system.
Confirm 
the loca-
tion of the 
electronic 
key.
Once 3 times
(Flashes)
An open door 
other than the 
driver’s door is 
closed while the 
electronic key is 
outside the 
detection range 
and the 
“POWER” 
switch is in 
ACCESSORY 
or ON mode.
Confirm 
the loca-
tion of the 
electronic 
key. 
         
        
        
     
        
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When trouble arises
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5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Interior
buzzer
Exterior
buzzerWarning messageDetailsCorrection 
procedure
Contin-
uous
Contin-
uous
(Displayed alternately)
(Flashes)
The driver’s 
door is opened 
and closed 
while the elec-
tronic key is out-
side the 
detection range 
and the 
“POWER” 
switch is in 
ACCESSORY 
or ON mode 
with the shift 
position not in P.
•Shift the 
shift posi-
tion to P.
•Confirm 
the loca-
tion of the 
electronic 
key.
Once 
(Comes on for 15 seconds.)
The electronic 
key battery is 
low.
Replace 
the bat-
tery. 
( oP.   4 9 7 ) 
         
        
        
     
        
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5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Emergency start function
When  the  hybrid  system  does  not  start,  the  following  steps  can  be
used  as  an  interim  measure  to  start  the  hybrid  system  if  the
“POWER” switch is functioning normally:
Set the parking brake.
Turn the “POWER” switch to ACCESSORY mode.
Press  and  hold  the  “POWER”  switch  for  about  15  seconds
while depressing the brake pedal firmly.
Even  if  the  hybrid  system  can  be  started  using  the  above  steps,  the
system  may  be  malfunctioning.  Have the vehicle inspected by your
To y o t a   d e a l e r .
■The interior lights and headlights do not turn on, or the horn
does not sound
One of the following may be the cause of the problem:
●One  or  both  of  the  12-volt  battery  terminals  may  be  discon-
nected.
●The 12-volt battery may be discharged. ( oP.   6 0 1 )
Contact  your  Toyota  dealer  if  the  problem  cannot  be  repaired,  or  if
repair procedures are unknown.
STEP 1 
STEP 2 
STEP 3  
         
        
        
     
        
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5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Starting the hybrid system
Depress the brake pedal.
To u c h   t h e   To y o t a   e m b l e m   s i d e   o f
the  electronic  key  to  the
“POWER” switch.
If  any  of  the  doors  is  opened  or
closed  while  the  key  is  being
touched  to  the  switch,  an  alarm
will sound to indicate that the start
function  cannot  detect  the  elec-
tronic key.
Press  the  “POWER”  switch  within  10  seconds  of  the  buzzer
sounding, keeping the brake pedal depressed.
In  the  event  that  the hybrid  system  still  cannot be operated, contact
your Toyota dealer.
STEP 1 
STEP 2 
■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. 
( oP.   4 9 7 )
■Changing “POWER” switch modes
Within  10  seconds  of  the  buzzer  sounding,  release  the  brake  pedal  and
press the “POWER” switch.
The hybrid system does not start and modes will be changed each time the
switch is pressed. ( oP.   2 4 4 )
STEP 3  
         
        
        
     
        
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When trouble arises
603
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Star t  th e  en gine  o f  the   se co nd  vehicle.  In cre ase   th e  e ngine
speed  slightly  and  maintain  at that  level  for  approximately
5minutes to charge the battery of your vehicle.
Maintain  the  engine  speed  of  the  second  vehicle  and  start
the  hybrid  system  of  your  vehicle  by  turning  the  “POWER”
switch to ON mode.
Make sure the “READY” indicator comes on. If the indicator
light does not come on, contact your Toyota dealer.
Once  the  hybrid  system  has started,  remove  the  jumper
cables in the exact reverse order from which they were con-
nected.
Close  the  exclusive  jump  starting  terminal  cover,  and  rein-
stall the fuse box cover to its original position.
When  installing,  first  hook  the  fuse  box  cover  onto  the  two  rear
tabs.
Once  the  hybrid  system  starts,  have  the  vehicle  inspected  at
your Toyota dealer as soon as possible.
STEP 4 
STEP 5 
STEP 6 
STEP7
STEP8