2023 TOYOTA PRIUS PRIME key battery

5688-2. Steps to take in an emergency
To prevent the shift lever from being
operated incorrectly or the vehicle
from moving unexpectedly, a mes-
sage that requires shifting the shift
position may be displayed on the
multi-information display.
In that case, follow the instruction of
the message and shift the shift posi-
tion.
●If a message or image about an
open/close state of a part or
replenishment of a consumable is
shown
Confirm the part indicated by the
multi-information di splay or a warn-
ing light, and then perform the cop-
ing method such as closing the
open door or replenishing a con-
sumable.
■If a message that indicates the
need for visiting your Toyota
dealer is displayed
The system or part shown on the
multi-information di splay is malfunc-
tioning. Have the vehicle inspected
by your Toyota dealer immediately.
■If a message that indicates the
need for referring to Owner’s
Manual is displayed
●If “Engine Coolant Temp High” is
shown, follow the instructions,
accordingly. ( P.594)
●If the following messages are
shown, there may be a malfunc-
tion. Immediately have the vehi-
cle inspected by your Toyota
dealer.
• “Plug-in Charging System Mal-
function”
• “Hybrid System Malfunction”
• “Check Engine”
• “Traction battery system malfunc- tion”
• “Accelerator System Malfunction”
• “Smart Key System malfunction”
• “Shift System Malfunction Apply Parking Brake Se curely When
Parking See Owner’s Manual” • “P Switch Malfunction Apply Park-
ing Brake Securely When Parking
See Owner’s Manual”
• “Shift System Unavailable Apply Parking Brake Securely When
Parking See Owner’s Manual”
• “Shift System Malfunction See Owner’s Manual”
• “Shift System Malfunction Stop in
a Safe Place See Owner’s Man-
ual”
• “Battery Low Shifting Unavailable
See Owner’s Manual”
●If the following messages are
shown, there may be a malfunc-
tion. Immediately stop the vehicle
in a safe place and contact your
Toyota dealer. Continuing to drive
the vehicle may be dangerous.
• “Oil pressure low”
• “Braking Power Low”
●If any of the following messages
are shown on the multi-informa-
tion display, the vehicle may have
run out of fuel. Stop the vehicle in
a safe place and, if the fuel level is
low, refuel the vehicle.
• “Hybrid system stopped”
• “Engine stopped No Fuel”
●If “12-Volt Battery Charging Sys-
tem Malfunction Stop in a Safe
Place See Owner’s Manual” is
shown
Indicates a malfunction in the vehi-
cle’s charging system. Pull over and
stop the vehicle as soon as it is safe
to do so.
While the message is displayed, the
functions of the air conditioning, etc.
may be partially lim ited in order to
reduce the power consumption of
the 12-volt battery.
■If “Traction battery needs to be
protected. Refrain from the use
of N position.” is shown
This message may be displayed
when the shift position is in N.
As the hybrid battery (traction bat-
tery) can not be charged when the

5848-2. Steps to take in an emergency
One of the following may be the
cause of the problem:
The AC charging cable may
be attached to the vehicle.
( P.116)
 The electronic key may not be
functioning properly.
( P.587)
 There may not be sufficient
fuel in the vehicle’s tank.
Refuel the vehicle. ( P.279)
 There may be a malfunction
in the immobilizer system.
( P.70)
 There may be a malfunction
in the shift control system.
*
( P.253)
 The hybrid system may be
malfunctioning due to an elec-
trical problem such as elec-
tronic key battery depletion or
a blown fuse. However,
NOTICE
●Do not disassemble or modify
the repair kit. Do not subject
parts such as the air pressure
indicator to impacts. This may
cause a malfunction.
■To avoid damage to the tire
pressure warning valves and
transmitters
When a tire is repaired with liquid
sealants, the tire pressure warn-
ing valve and transmitter may not
operate properly. If a liquid seal-
ant is used, contact your Toyota
dealer or other qualified service
shop as soon as possible. After
use of liquid sealant, make sure to
replace the tire pressure warning
valve and transmitter when repair-
ing or replacing the tire. ( P.518)
If the hybrid system
will not start
Reasons for the hybrid sys-
tem not starting vary
depending on the situation.
Check the following and
perform the appropriate
procedure:
The hybrid system will not
start even though the cor-
rect starting procedure is
being followed ( P.251)

5878-2. Steps to take in an emergency
8
When trouble arises
■When the electronic key does
not work properly
●Make sure that the smart key sys-
tem has not been deactivated in
the customization setting. If it is
off, turn the function on.
(Customizable features: P.622)
●Check if battery-saving mode is
set. If it is set, cancel the function.
( P.205)
●The electronic key function may
have stopped. ( P.205)
Use the mechanical key
( P.182) in order to perform the
following operations.
1 Locks all the doors
2 Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again within 5 seconds
unlocks the other doors.
■Key linked functions
1 Closes the windows (turn and
hold)
*
2Opens the windows (turn and
hold)
*
*
: These settings must be custom- ized at your Toyota dealer.
If the electronic key
does not op erate prop-
erly
If communication between
the electronic key and vehi-
cle is interrupted ( P.205)
or the electronic key cannot
be used because the battery
is depleted, the smart key
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 procedure
below.
NOTICE
■In case of a smart key system
malfunction, or other key
related problems
Take your vehicle with all the
electronic keys provided with your
vehicle to your Toyota dealer.
Locking and unlocking
the doors

5888-2. Steps to take in an emergency
1Ensure that the shift position
is in P and depress the brake
pedal.
2 Touch the area behind the
buttons on the electronic key
to the power switch.
When the electronic key is
detected, a buzzer sounds and the
power switch will turn to ON.
When the smart key system is
deactivated in customization set-
ting, the power switch will turn to
ACC.
3Firmly depress the brake
pedal and check that
and a message are displayed on the multi-information dis-
play.
4 Press the power switch
shortly and firmly.
In the event that the hybrid system
still cannot be started, contact your
Toyota dealer.
■Stopping the hybrid system
Shift the shift position to P, set the
parking brake and press the power
switch as you normally do when
stopping the hybrid system.
■Replacing the key battery
As the above procedure is a tempo-
rary measure, it is recommended
that the electronic key battery be
replaced immediately when the bat-
tery is depleted. ( P.538)
■Changing power switch modes
Release the brake pedal and press
the power switch in step 3 above.
The hybrid system does not start
and modes will be changed each
time the switch is pressed.
(  P.254)
WARNING
■When using the mechanical
key and operating the power
windows
Operate the power window after
checking to make sure that there
is no possibility of any passenger
having any of their body parts
caught in the window. Also, do not
allow children to operate the
mechanical key. It is possible for
children and other passengers to
get caught in th e power window.
Starting the hybrid sys-
tem

5918-2. Steps to take in an emergency
8
When trouble arises
cal components when the vehicle
is running at a low speed for an
extended period, such as in heavy
traffic.
■When the 12-volt battery is
removed or discharged
●Information stored in the ECU is
cleared. When the 12-volt battery
is depleted, have the vehicle
inspected at your Toyota dealer.
●Some systems may require initial-
ization. ( P.634)
■When removing the 12-volt bat-
tery terminals
When the 12-volt battery terminals
are removed, the information stored
in the ECU is cl eared. Before
removing the 12-volt battery termi-
nals, contact your Toyota dealer.
■Charging the 12-volt battery
The electricity stored in the 12-volt
battery will discharge gradually even
when the vehicle is not in use, due
to natural discharge and the drain-
ing effects of certain electrical appli-
ances. If the vehicle is left for a long
time, the 12-volt battery may dis-
charge, and the hybrid system may
be unable to start. (The 12-volt bat-
tery recharges automatically while
the hybrid system is operating.)
■When recharging or replacing
the 12-volt battery
●In some cases, it may not be pos-
sible to unlock the doors using the
smart key system when the 12-
volt battery is discharged. Use the
wireless remote control or the
mechanical key to lock or unlock
the doors.
●The hybrid system may not start
on the first attemp t after reinstall-
ing the 12-volt battery. In that
case, start the hybrid system in
the same manner as when the
electronic key does not operate
properly ( P.588). This is not a
malfunction, as the hybrid system
will start normally on the second
attempt.
●The power switch mode is memo-
rized by the vehicle. When the 12-
volt battery is reconnected, the
system will return to the mode it
was in before the 12-volt battery
was discharged. Before discon-
necting the 12-volt battery, turn
the power switch off.
If you are unsure what mode the
power switch was in before the
12-volt battery discharged, be
especially careful when recon-
necting the 12-volt battery.
●If the 12-volt battery discharges, it
may not be possible to shift the
shift position to other positions.
In this case, the vehicle can not be
towed without lifting both front
wheels because the front wheels
will be locked.
●Some systems may require initial-
ization. ( P.634)
■When replacing the 12-volt bat-
tery
●Use a 12-volt battery that con-
forms to Europ ean regulations.
●Use a battery that the case size is
same as the previous one (LN1),
20 hour rate capacity (20HR) is
equivalent (45Ah) or greater, and
performance rating (CCA) is
equivalent (285A) or greater.
• If the sizes differ, the 12-volt bat-
tery cannot be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the
vehicle is not used is a short time,
the 12-volt battery may discharge
and hybrid system may not be
able to start.
●Use a ventilation type calcium bat-
tery
●Use a 12-volt battery with a han-
dle. If a 12-volt battery without a
handle is used, removal is more
difficult.
●When removing the 12-volt bat-
tery: P.512
●After replacing, firmly attach the
following items to the exhaust hole

648What to do if... (Troubleshooting)
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your keys or
mechanical keys, new genu-
ine keys or mechanical keys
can be made by your Toyota
dealer. ( P.586)
 If you lose your electronic
keys, the risk of vehicle theft
increases significantly. Con-
tact your Toyota dealer imme-
diately. ( P.586)
 Is the key battery weak or
depleted? ( P.538)
 Is the power switch in ON?
When locking the doors, turn
the power switch off.
( P.254)
 Is the electronic key left inside
the vehicle?
When locking the doors,
make sure that you have the electronic key on your person.
 The function may not operate
properly due to the condition
of the radio wave. ( P.205)
 Is the child-protector lock set?
The rear door cannot be
opened from inside the vehi-
cle when the lock is set. Open
the rear door from outside
and then unlock the child-pro-
tector lock. ( P.189)
 Did you press the power
switch while firmly depress-
ing the brake pedal?
( P.251)
 Is the shift position in P?
( P.251)
 Is the electronic key any-
where detectable inside the
vehicle? ( P.204)
 Is the electronic key battery
weak or depleted?
In this case, the hybrid sys-
tem can be started in a tem-
porary way. ( P.588)
If you have a problem,
check the following before
contacting your Toyota
dealer.
The doors cannot be
locked, unlocked, opened
or closed
You lose your keys
The doors cannot be
locked or unlocked
The rear door cannot be
opened
If you think something is
wrong
The hybrid system does
not start

652Alphabetical Index
sification system ................... 44
Points to remember ................ 51
Riding with children ................ 50
Types of child restraint system installation method ............... 53
Using an anchor bracket ........ 62
Child safety ............................... 50 12-volt battery precautions . 511, 592
Airbag precautions ................. 40
Back door precautions ......... 191
Charging precautions ........... 115
Child restraint system............. 53
Heated steering wheel precau- tions.................................... 443
How your child should wear the seat belt................................ 32
Power window lock switch.... 229
Power window precautions .. 228
Rear door child-protector lock ........................................... 189
Removed key battery precau- tions.................................... 539
Seat belt extender precautions ............................................. 32
Seat belt precautions ............. 31
Seat heater precautions ....... 443
Window lock switch .............. 229
Cleaning .......................... 486, 490 Aluminum wheels ................. 486
Exterior ................................. 486
Interior .................................. 490
Radar sensor........................ 355
Seat belts ............................. 490
Condenser .............................. 508
Console box ............................ 451
Coolant Checking .............................. 507
Preparing and checking before winter.................................. 429
Warning light ........................ 556
Cooling system ...................... 507 Hybrid system overheating ...594
Coussins gonflables Emplacement des coussins gonflables SRS...................639
Modification et mise au rebut des coussins gonflables ............645
Précautions générales relatives aux coussins gonflables .....641
Précautions relatives aux couss- ins gonflables en rideau .....641
Précautions relatives aux couss- ins gonflables latéraux et en
rideau .................................641
Précautions relatives aux couss- ins gonflables latéraux........641
Précautions relatives aux couss- ins gonflables pour vos enfants...........................................641
Cruise control Cruise control .......................342
Dynamic radar cruise control 331
Cup holders.............................451
Current fuel economy ............163
Curtain shield airbags ..............35
Customizable features ...........618
Custom mode..........................422
D
Daytime running light system270 Replacing exterior lights .......543
Deck board ..............................454
Deck under tray ......................455
Defogger Outside rear view mirrors .....436
Rear window.........................436
Windshield ............................435
Digital Rear-view Mirror .........217
Dimensions .............................600
Dinghy towing .........................250
Display Cruise control .......................342
Driving information ...............163

Alphabetical Index653
Energy monitor ..................... 173
Intuitive parking assist .......... 363
Multi-information display ...... 161
Parking Support Brake function (rear pedestrians) ............... 394
RCD (Rear Camera Detection) ........................................... 379
RCTA ................................... 373
Warning messages .............. 566
Do-it-yourself maintenance . 495, 499
Door lock Back door ............................. 191
Side doors ............................ 185
Smart key system................. 203
Wireless remote control ....... 182
Doors Automatic door locking and unlocking system................ 190
Back door ............................. 191
Door glasses ........................ 227
Door lock .............................. 185
Open door warning buzzer ... 189
Outside rear view mirrors ..... 225
Rear door child-protector lock ........................................... 189
Side doors ............................ 185
Driver’s seat belt reminder light ............................................... 562
Driver’s seat position memory ............................................... 231Driving position memory....... 231
Memory recall function ......... 232
Driver monitor ........................ 292
Drive-Start Control (DSC) ...... 245 Sudden start restraint control245
Driving ..................................... 239 Break-in tips ......................... 240
Correct posture ...................... 29
Driving in the rain ................. 240
Driving mode select switch... 422
Plug-in Hybrid Electric Vehicle driving tips ............................88
Procedures ...........................239
Winter drive tips....................429
Driving information display ...163
Driving mode select switch ...422
Driving position memory .......230 Memory recall function .........232
Power easy access system ..230
Seat position memory...........231
Driving support system informa- tion display............................165
DSC (Drive-Start Control) ......245 Sudden start restraint control245
Dynamic radar cruise control Function................................331
Warning message . ...............566
E
Eco drive mode .......................422
EDR (Event data recorder) .......10
Elapsed time ...........................165
Electric motor (traction motor)72
Location ..................................72
Specification .........................602
Electric Power Steering (EPS)
Function................................424
Warning light ........................558
Electronic key Battery-saving function .........204
If the electronic key does not operate properly .................587
Replacing the battery ...........538
Emergency, in case of If a warning buzzer sounds ..555
If a warning light turns on .....555
If a warning message is dis-played .................................566
If the 12-volt battery is dis- charged ..............................589
If the electronic key does not operate properly .................587
If the hybrid system will not start