2015 TOYOTA PRIUS Owners Manual

5
When trouble arises
529
5-2. Steps to take in an emergency
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Other displayed messages
Carrying out the corresponding action turns the message off.
Displayed messageDetailsCorrection procedure
Maintenance of the hybrid sys-
tem (traction battery) cooling
component is required The filter may be clogged, the
air vent may be blocked or
there may be a gap in the
duct. Have maintenance
performed on the
hybrid system
(traction battery)
cooling component
at your Toyota
dealer.
EV drive mode cannot be
switched to. A buzzer also sounds.
The reason why EV drive
mode cannot be used is
shown (may not be shown in
some instances.) Use the EV drive
mode when it
becomes available.
(Flashes
3times) EV drive mode has been auto-
matically canceled.
A buzzer also sounds.
The reason why EV drive
mode cannot be used is
shown (may not be shown in
some instances.) Drive normally for a
short time.

530 5-2. Steps to take in an emergency
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Have the malfunction repaired immediately.If any of the following warnings is displayed when a hybrid system
start operation is performed, perform the appropriate action accord-
ing to the warning message display.
Warning messageDetailsCorrection procedure
Indicates an insufficient 12-volt
battery charge. A buzzer also sounds.
• The parking lock mechanism may not function.
• The hybrid system may not be able to start.
• 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. When parking, park
the vehicle on a flat
surface and apply
the parking brake
securely.
Charge or replace
the 12-volt battery.
After charging the
12-volt battery, the
message may con-
tinue to be dis-
played until the
shift position is
changed from P.

5
When trouble arises
531
5-2. Steps to take in an emergency
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Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem,
check that the warning message and light turn off.
InteriorbuzzerExterior 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.

532 5-2. Steps to take in an emergency
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InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Once 3 times (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 in P. Turn the
“POWER”
switch to
OFF or
confirm
the loca-
tion of the
electronic
key.
Contin-
uous 
(Flashes)The driver’s
door has been
opened with the
shift position in
a position other
than P and with-
out first turning
the “POWER”
switch is OFF.
Shift the
shift posi-
tion to P.

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When trouble arises
533
5-2. Steps to take in an emergency
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Interior
buzzerExterior buzzerWarning messageDetailsCorrection procedure
Once Contin-
uous
(Displayed alternately)(Flashes) The electronic
key has been
taken outside
the vehicle and
the doors have
been locked
without first
turning the
“POWER”
switch to OFF.
(vehicles with
entry function)
Turn the
“POWER”
switch to
OFF and
lock the
doors
again.

534 5-2. Steps to take in an emergency
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InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Once Contin-
uous
(Flashes)An attempt to
lock the doors
has been made
using the smart
key system
while the elec-
tronic key is
inside the vehi-
cle. (vehicles
with entry func-
tion)
Take the
electronic
key out-
side the
vehicle,
and lock
the doors
again.
With the key
inside the vehi-
cle, a front door
has been
opened, the
lock lever has
been pulled in
the lock direc-
tion, the door
has been
closed and an
attempt has
been made to
lock the door.

5
When trouble arises
535
5-2. Steps to take in an emergency
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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. 464)
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.

536 5-2. Steps to take in an emergency
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InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Once 
(Flashes)The elec-
tronic key
does not
operate
properly.
P. 553
 Power
was
turned off
due to
the auto-
matic
power off
function.Next time when
starting the
hybrid system,
operate the
hybrid system
for approxi-
mately 5 minutes
to recharge the
12-volt battery.
NOTICE
■
While the engine oil level warning is displayed
Continued engine operation with low engine oil will damage the engine.
■ Engine oil maintenance message
The warning message is based on the projected driving range after engine
oil maintenance message is reset.
The system does not monitor the purity of the engine oil.