2019 TOYOTA PRIUS PLUS battery

4497-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
(If equipped)
Hybrid system overheat warning light (warning buzzer)
Indicates that the hybrid system has overheated
This light may come on when driving under severe operat-
ing conditions, and the output 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.)
 Stop the vehicle in a safe place.
Handling method ( P. 520)
(If equipped)
Cruise control indicator (yellow indicator)
Indicates a malfunction in the cruise control
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
(Only outer frame flashes)(If equipped)
Low hybrid battery (traction battery) warning light
(warning buzzer)
Hybrid battery (traction battery) level becomes low
because the shift position is in N for long time
 Because recharging is not possible when the shift
position is in N, shift the shift position to P when
parking the vehicle for a long time.
High coolant temperature warning light
Changes from a flashing to a solid light when the engine
coolant temperature increases
 Immediately stop the vehicle in a safe place.
( P. 518)
Automatic headlight leveling system warning light
Indicates a malfunction in the automatic headlight leveling
system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Open door warning light (warning buzzer)*3
Indicates that a door is not fully closed
 Check that all the doors are closed.
Low fuel level warning light
Indicates that remaining fuel is approximately 6.0 L (1.6
gal., 1.3 Imp.gal.) or less
 Refuel the vehicle.
Warning lightWarning light/Details/Actions

4517-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
*1: Brake system warning buzzer:
When there is a possible problem that could affect braking performance,
the warning light will come on and a warning buzzer will sound.
Parking brake engaged warning buzzer:
A buzzer will sound if the vehicle is driven at a speed of approximately
5 km/h (3 mph) or more.
*2: If you continue to use the vehicle in this state, the light starts blinking with
buzzer sounds, and you will soon become unable to start the hybrid sys-
tem.
*3: Open door warning buzzer:
The open door warning buzzer sounds to alert one or more of the doors is
not fully closed (with the vehicle having reached a speed of 5 km/h
[3 mph]).
*4: Seat belt buzzer:
The seat belt buzzer sounds to alert the driver, front passenger and rear
passengers that his or her seat belt is not fastened. The buzzer sounds for
30 seconds after the vehicle reaches a speed of 20 km/h (12 mph). Then, if
the seat belt is still unfastened, the buzzer will sound in a different tone for
90 more seconds.
Carrying out the corresponding action turns the warning light off.
Other warning light
Warning lightWarning light/Details/Actions
(If equipped)
Go to service warning light
Indicates that maintenance of the hybrid battery (traction
battery) 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 component at any autho-
rized Toyota retailer or Toyota authorized repairer, or
any reliable repairer.

4527-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
■Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage tempo-
rarily drops, the electric power steering system warning light may come on
and the warning buzzer may sound.
■ If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp will come on if the fuel tank becomes com-
pletely empty. If the fuel tank is empt y, refuel the vehicle immediately. The
malfunction indicator lamp will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized
Toyota retailer or Toyota authorized repai rer, or any reliable repairer as soon
as possible.
■ When the tire pressure warning light comes on
Inspect the appearance of the tire to check that the tire is not punctured.
If the tire is punctured: P. 478, 492
If the tire is not punctured:
Carry out the following procedure after the tire temperature has lowered suffi-
ciently.
● Check the tire inflation pressure and adjust to the appropriate level.
● If the warning light does not go out even after several minutes, check that
the tire inflation pressure is at the specified level and carry out initialization.
( P. 395)
The warning light may come on again if the above operations are conducted
without first allowing the tire temperature to lower sufficiently.
■ The tire pressure warning light may come on due to natural causes
The tire pressure warning light may turn on due to natural causes such as
natural air leaks or tire inflation pressure changes caused by temperature. In
this case, adjusting the tire inflation pressure will turn off the warning light
(after a few minutes).
■ When a tire is replaced with a spare tire
The compact spare tire is not equipped with a tire pressure warning valve and
transmitter. If a tire goes flat, the tire pressure warning light will not turn off
even though the flat tire has been replaced with the spare tire. Replace the
spare tire with the repaired tire and adjus t the tire inflation pressure. The tire
pressure warning light will go off after a few minutes.

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

4607-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
Indicates that the hybrid battery (traction battery)
power has dropped because a certain period of
time has elapsed after shifting the shift position to
N
A buzzer also sounds.
 Restart the hybrid system when starting
the vehicle.
Indicates a malfunction in the shift control system
In this situation, there is a possibility that the
parking lock mechanism will not work. When
parking, park the vehicle on a flat surface and
apply the parking brake securely. Also, 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. A buzzer
also sounds.
 Have the vehicle inspected by any autho-
rized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
Indicates a malfunction in the hybrid system
A buzzer also sounds.
 Immediately stop the vehicle in a safe place
and contact any authorized Toyota retailer
or Toyota authorized repairer, or any reli-
able repairer.
Indicates that the hybrid battery (traction battery)
is low
A buzzer also sounds.
 When stopping the vehicle, shift the shift
position to P. The battery cannot be
charged with the shift position in N.
Indicates that the shift position was changed and
Drive-Start Control was operated while depress-
ing the accelerator pedal
A buzzer also sounds.
 Momentarily release the accelerator pedal.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)

4657-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
(If equipped)
Indicates that the PCS (Pre-Crash Safety sys-
tem) is temporarily unavailable
 When conditions improve, the system
resumes operation. If this item is displayed
continuously, have the vehicle inspected
by any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
(If equipped)
Indicates that the PCS (Pre-Crash Safety sys-
tem) is temporarily unavailable
 When conditions improve, the system
resumes operation. If this item is displayed
continuously, have the vehicle inspected
by any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
(If equipped)
Indicates that part of the PCS (Pre-Crash Safety
system) sensor is dirty, covered with ice, etc.
 Remove any dirt, ice, etc.
Hybrid battery (traction battery) inspection or
replacement time.
 Have the hybrid battery (traction battery)
inspected by any authorized Toyota retailer
or Toyota authorized repairer, or any reli-
able repairer immediately.
Hybrid system restarting will soon be disabled.
 If you continue to use the vehicle in this
state, you will soon become unable to
restart the hybrid system. Have the hybrid
battery (traction battery) inspected by any
authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer
immediately.
Indicates that restarting of the hybrid system is
not possible.
 Contact any authorized Toyota retailer or
Toyota authorized repairer, or any reliable
repairer immediately.
Warning messageDetails/Actions

4667-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
An attempt was made to change the shift position
when the 12-volt battery voltage was low.
A buzzer also sounds.
 Maintain the hybrid system operation state for approximately 15 minutes or more torecharge the 12-volt battery.
 The hybrid system will not start: Start the hybrid system by following the “If the12-volt battery is discharged” procedure
( P. 513).  The message appears frequently: The 12-volt battery may be deteriorating.
The 12-volt battery may be discharged if this continues. Have the 12-volt batteryinspected at any author ized Toyota retailer
or Toyota authorized repairer, or any reli- able repairer.
The shift lever and P position switch were repeat-
edly operated in quick succession.
A buzzer also sounds.
 Wait approximately 20 seconds and change
the shift position.
An attempt was made to change the shift position
to B when the shift position was P or N.
A buzzer also sounds.
 Change the shift position to D, and then
change the shift position to B.
An attempt was made to change the shift position to R, D or B with the power switch on (READY
indicator turned off). A buzzer also sounds.
 After starting the hybrid system, change the shift position to R, D or B*.
*: When changing the shift position to B, first
change the shift position to D, and then
change the shift position to B.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)

4687-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
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. 513).
 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 any author ized Toyota retailer
or Toyota authorized repairer, or any reli-
able repairer.
Shift control system malfunction
A buzzer also sounds.
 Have the vehicle inspected by any autho-
rized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
• The hybrid system may not be able to start.
• The parking lock mechanism may not func-
tion. When parking, choose a level location
and apply the parking brake securely.
• 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.
Warning messageDetails/Actions