Page 501 of 620

5018-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
8
When trouble arises
After taking the specified steps to correct the suspected problem,
check that the warning light turn off.
Follow the correction procedures. (vehicles without multi-infor-
mation display)
Interior
buzzerExterior
buzzerWarning
lightDetailsCorrection procedure
Once
The electronic key
is not detected
when an attempt
is made to start
the hybrid system.
Start the hybrid system
with the electronic key
present.
The power switch
has been pressed
while the elec-
tronic key was not
detected inside
the vehicle.
Confirm the location of
the electronic key.
(P. 130)
If the warning light does
not extinguish even
though the electronic
key is within operating
range, touch the elec-
tronic key to the power
switch while depressing
the brake pedal
(P. 536)
Transmission
between the elec-
tronic key and the
vehicle is being
blocked, or the bat-
tery in the electronic
key has been
depleted.
Once
Driving has been
started without
the correct elec-
tronic key inside
the vehicle.
Confirm the location of
the electronic key.
Page 503 of 620
503
PRIUS v_OM_OM47B12U_(U)
8
When trouble arises
8-2. Steps to take in an emergency
If a war ning message is displayed
Master warning light
The master warning light also
comes on or flashes in order to
indicate that a message is cur-
rently being displayed on the
multi-information display.
Multi-information display
If any of the warning lights come on again after the following actions
have been performed, contact your Toyota dealer.
: If equipped
If a warning is shown on the multi-information display, stay calm
and perform the following actions:
1
2
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5078-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
8
When trouble arises
Indicates an engine oil pressure malfunction
A buzzer also sounds.
Immediately stop the vehicle in a safe place
and contact your Toyota dealer.
Indicates that the hybrid system has overheated
This message may be displayed when driving
under severe operating conditions, and the out-
put of the hybrid system may temporarily
decrease in order to protect the system. (For
example, when driving up a long steep hill or
driving up a steep hill in reverse.)
A buzzer also sounds.
Stop and check. (P. 543)
(If equipped)
Indicates a malfunction in the Automatic High
Beam
A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
Indicates that the insufficient 12-volt battery
charge
A few seconds
* after the message disap-
pears: Maintain the hybrid system opera-
tion state for approximately 15 minutes or
more to recharge the 12-volt battery.
If the message does not disappear: Start
the hybrid system by following the “If the
12-volt battery is discharged” procedure
(P. 538).
*: This is displayed for about 6 seconds.
Warning messageDetails/Actions
(Flashes)
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5118-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
8
When trouble arises
An attempt was made to change the shift position
to R while the vehicle was moving forward.
A buzzer also sounds.
The shift position automatically changed to N.
Stop the vehicle, and then change the shift
position.
Indicates that the P position switch is pressed
while the vehicle is running.
A buzzer also sounds.
The shift position automatically changed to N.
To shift the shift position to P, stop the
vehicle completely and press the P posi-
tion switch.
To continue driving, shift the shift position
to D or R.
Insufficient 12-volt battery charge
The parking lock mechanism may not function.
The hybrid system may not be able to start.
The power switch may not be able to be turned
off. In this case, the power switch may be
turned off by applying the parking brake.
After charging the 12-volt battery, the message
may continue to be displayed until the shift
position is changed from P.
A buzzer also sounds.
When parking, choose a level location and
apply the parking brake securely.
Maintain the hybrid system operation state
for approximately 15 minutes or more to
recharge the 12-volt battery.
The hybrid system will not start: Start the
hybrid system by following the “If the
12-volt battery is discharged” procedure
(P. 538).
If the message does not disappear: The
12-volt battery may be deteriorating.
The 12-volt battery may be discharged if
this continues. Have the 12-volt battery
inspected at your Toyota dealer.
Warning messageDetails/Actions
(Flashes)
(Flashes)
Page 514 of 620
5148-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
Carrying out the corresponding action turns the messages off.
Other displayed messages
Displayed messageDetails/Actions
Maintenance of the hybrid battery (traction bat-
tery) cooling component is required
The filter may be clogged, the air intake vent
may be blocked or there may be a gap in the
duct.
Have maintenance performed on the hybrid
battery (traction battery) cooling compo-
nent at your Toyota dealer.
Indicates that the EV drive mode is not available*
The reason the EV drive mode is not available
(the vehicle is idling, battery charge is low,
speed is higher than the EV drive mode operat-
ing speed range, accelerator pedal is
depressed too much) may be displayed.
A buzzer also sounds.
Use the EV drive mode when it becomes
available.
Page 515 of 620
5158-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
8
When trouble arises
*: For the EV drive mode operating conditions (P. 179).
Indicates that the EV drive mode has been auto-
matically canceled
*
The reason the EV drive mode is not available
(the battery charge is low, speed is higher than
the EV drive mode operating speed range,
accelerator pedal is depressed too much) may
be displayed.
A buzzer also sounds.
Drive the vehicle for a while.
(If equipped)
Since the vehicle speed is about 32 mph (50 km/h)
or less, is not available LDA
Traveling at the speed 32 mph (50 km/h) or
more
Displayed messageDetails/Actions
(Flashes
3 times)
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5168-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
■Warning messages
The warning message illustrations used are intended as examples, and may
differ from the image that is actually displayed on the multi-information dis-
play.
■Warning message in radar cruise mode (if equipped)
In the following situations, the warning message may not be displayed even if
vehicle-to-vehicle distance decreases:
●When your vehicle and the vehicle ahead are traveling at the same speed or
the vehicle ahead is traveling more quickly than your vehicle
●When the vehicle ahead is traveling at a very low speed
●Immediately after cruise control speed is set
●At the instant the accelerator pedal is depressed
■The LDA lane departure alert function (if equipped)
In the following situation, the warning message will not be displayed even if a
lane line is crossed.
●When the vehicle speed deviates from the operating range of the LDA sys-
tem functions
●When the lane lines cannot be recognized
■Warning buzzer
P. 497
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5188-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(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.
Once
An attempt was made to turn
the power switch off when the
shift position was not in P.
To turn off the hybrid sys-
tem, first shift the shift
position to P and then turn
the power switch off.
Interior
buzzerExterior
buzzerWarning messageDetails/Actions
(Flashes)
(Displayed alternately)
(Flashes)
(Flashes)