battery TOYOTA PRIUS PLUS 2015 Repair Manual

3937-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
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 approxi-
mately 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. 439).→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 battery inspected at your Toyota dealer.
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.
An attempt was made to change the shift position
from P with the brake pedal released.
A buzzer also sounds.
→ When changing the shift position from P,
depress the brake pedal.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)
(Flashes)

3957-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
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. 439).
→ 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.
Shift control system malfunction
A buzzer also sounds.
→ Have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another
duly qualified and equipped professional.
• 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.
Shift control system malfunction A buzzer also sounds.
→ Have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another
duly qualified and equipped professional
immediately. If not inspected, vehicle sys-
tems may stop operating normally.
Warning messageDetails/Actions

3977-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
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 requiredThe 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 any authorized Toyota dealer or
repairer, or another duly qualified and
equipped professional.
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.

3987-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
*: For the EV drive mode operating conditions (→P. 206).
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.
Displayed messageDetails/Actions
(Flashes
3 times)

4037-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
■Warning messages
→ P. 399
■ Warning buzzer
→ P. 384
Once
The driver’s door was opened
and closed with the power
switch turned off and then the
power switch was put in
ACCESSORY mode twice with-
out the hybrid system being
started.
→ Press the power switch
while depressing the brake
pedal.
During a hybrid system starting
procedure in the event that the
electronic key was not function-
ing properly ( →P. 437), the
power switch was touched with
the electronic key.
→ Press the power switch
within 10 seconds of the
buzzer sounding.
Once
An attempt was made to start
the hybrid system with the shift
position in N.
→Shift the shift position to P
and start the hybrid sys-
tem.
Once
The electronic key has a low
battery.
→Replace the electronic key
battery. ( →P. 351)
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)

4357-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
If the hybrid system will not start
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly.
* (→ P. 437)
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. ( →P. 8 7 )
● There may be a malfunction in the immobilizer system.
* (→ P. 9 1 )
● There may be a malfunction in the shift control system.
*
( → P. 204, 378, 390)
● The hybrid system may be malfunctioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. How-
ever, depending on the type of malfunction, an interim measure is
available to start the hybrid system. ( →P. 436)
*: It may not be possible to shift the shift position other than P.
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( →P. 439)
● The 12-volt battery terminal connections may be loose or corroded.
(→ P. 327)
Reasons for the hybrid system not starting vary depending on
the situation. Check the following and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( →P. 201)
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

4367-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( →P. 439)
● One or both of the 12-volt battery terminals may be disconnected.
(→ P. 327)
Contact any authorized Toyota dealer or repairer, or another duly
qualified and equipped professional if the problem cannot be repaired,
or if repair procedures are unknown.
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.
Do not use this starting procedure except in cases of emergency. 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 any
authorized Toyota dealer or repairer, or another duly qualified and
equipped professional.
The interior lights and headlights do not turn on, or the horn
does not sound.
Emergency start function
1
2
3

4377-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
If the electronic key does not operate
properly
Use the mechanical key (→P. 139)
in order to perform the following
operations:
Locks all the doors
Unlocks all the doors
Depress 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
any authorized Toyota dealer or repairer, or another duly qualified and
equipped professional.
If communication between the electronic key and vehicle is inter-
rupted ( →P. 154) or the electronic key cannot be used because the
battery is depleted, the smart entry & start system and wireless
remote control cannot be used. In such cases, the doors can be
opened and the hybrid system can be started by following the pro-
cedure below.
Locking and unlocking the doors
1
2
Starting the hybrid system
1
2
3

4387-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
■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 imm ediately when the battery is depleted.
( → P. 351)
■ Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set,
the alarm may be triggered. ( →P. 97)
■ 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. 203)

4397-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
If the 12-volt batter y is discharged
If you have a set of jumper (or booster) cables and a second vehicle
with a 12-volt battery, you can jump start your vehicle by following the
steps below.Open the hood ( →P. 313) and
fuse box cover.
When closing, first hook the lid
onto the two rear tabs.
Open the exclusive jump start-
ing terminal cover.
The following procedures may be used to start the hybrid sys-
tem if the vehicle’s 12-volt battery is discharged.
You can also call any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
1
2