2015 TOYOTA PRIUS PLUG-IN HYBRID key battery

498 4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
■Use a CR1632 lithium battery
●Batteries can be purchased at your Toyota dealer, local electrical appli-
ance shops or camera stores.
● Replace only with the same or equivalent type recommended by the
manufacturer.
● Dispose of used batteries according to local laws.
■ If the electronic key battery is depleted
The following symptoms may occur:
●The smart key system and wireless remote control will not function prop-
erly.
● The operational range will be reduced.
CAUTION
■Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
●Always work with dry hands.
Moisture may cause the battery to rust.
● Do not touch or move any other component inside the remote control.
● Do not bend either of the battery terminals.

When trouble arises5
527
PRIUS PHV_OM_OM47A11U_(U)
5-1. Essential informationEmergency flashers ......... 528
If your vehicle needs to be towed ........................ 529
If you think something is wrong ............................. 536
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds ........................... 537
If a warning message is displayed........................ 550
If you have a flat tire......... 574
If the hybrid system will not start .................... 596
If you lose your keys ........ 598
If the electronic key does not operate properly....... 599
If the 12-volt battery is discharged ..................... 601
If your vehicle overheats ....................... 607
If the vehicle becomes stuck .............................. 613
If your vehicle has to be stopped in an
emergency ..................... 615

5
When trouble arises
529
5-1. Essential information
PRIUS PHV_OM_OM47A11U_(U)
If your vehicle needs to be towed
Situations when it is not possible to be towed by another vehicle
In the following situations, it is not possible to be towed by another
vehicle using cables or chains, as the front wheels may be locked
due to the parking lock. Contact your Toyota dealer or a commercial
towing service.
● There is a malfunction in the shift control system. ( P. 552)
● There is a malfunction in the immobilizer system. ( P. 183)
● There is a malfunction in the smart key system. ( P. 599)
● The 12-volt battery is discharged. ( P. 601)
Situations needs to contact dealers before towing
The following may indicate a problem with your hybrid transmission.
Contact your Toyota dealer or commercial towing service before tow-
ing.
● The “CHECK HYBRID SYSTEM” warning message appears on
the multi-information display and the vehicle does not move.
● The vehicle makes an abnormal sound.
If towing is necessary, we recommend having your vehicle towed by
your Toyota dealer or commerci al towing service, using a lift-type
truck or flat bed truck.
Use a safety chain system for all to wing, and abide by all state/pro-
vincial and local laws.

5
When trouble arises
567
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Interior
buzzerExterior 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.
(
P. 497)

568 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Once 
(Flashes)An open door
has been
closed and the
“POWER”
switch has been
turned twice to
the ACCES-
SORY mode
from OFF. Press the
“POWER”
switch
while
applying
the
brakes.
Once 
(Flashes)The electronic
key does not
operate prop-
erly.
P. 599
 Power was
turned off due to
the automatic
power off func-
tion.Next time
when
starting
the hybrid
system,
operate
the hybrid
system for
approxi-
mately 5
minutes to
recharge
the 12-volt
battery.

596
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the
situation. Check the following a nd perform the appropriate proce-
dure:
■ The hybrid system will not start even though the correct
starting procedure is being followed ( P. 242)
One of the following may be the cause of the problem:
● The charging cable may be attached to the vehicle. ( P. 96)
● The electronic key may not be functioning properly.
*
(  P. 599)
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. ( P. 4 6 )
● There may be a malfunction in the immobilizer system.
*
(  P. 183)
● There may be a malfunction in the shift control system.
*
(  P. 247, 552)
*: It may not be possible to shift the shift position from P to other posi-
tion.
■ The interior lights and headlights are dim, or the horn does
not sound or sounds at a low volume
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( P. 601)
● The 12-volt battery terminal c onnections may be loose or cor-
roded.

5
When trouble arises
599
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
If the electronic key does not operate properly
Locking and unlocking the doorsUse the mechanical key (P. 1 1 0 )
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.
If communication between the electronic key and vehicle is inter-
rupted ( P. 123) or the electronic key cannot be used because the
battery is depleted, the smart key system and wireless remote con-
trol cannot be used. In such cases, the doors can be opened and the
hybrid system can be started by following the procedure below.
ITO52P12N

600 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Starting the hybrid systemDepress the brake pedal. Touch the Toyota emblem side of
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.
(P. 497)
■ 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. ( P. 244)
STEP 3