key TOYOTA PRIUS PLUG-IN HYBRID 2021 Repair Manual

7548-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47D72E_(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. 688)
■ 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. 8 7 )
■ Changing power switch modes
Release the brake pedal and press the power switch in step above. The
hybrid system does not start and modes will be changed each time the switch
is pressed. ( P. 375)
■ When the electronic key does not work properly
● Make sure that the smart entry & start system has not been deactivated in
the customization setting. If it is off, turn the function on.
(Customizable features: P. 782)
● Check if battery-saving mode is set. If it is set, cancel the function.
( P. 295)
WARNING
■When using the mechanical key and operating the power windows
Operate the power window after checking to make sure that there is no pos-
sibility of any passenger having any of their body parts caught in the win-
dow.
Also, do not allow children to operate the mechanical key. It is possible for
children and other passengers to get caught in the power window.
3

7558-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
8
When trouble arises
If the 12-volt battery 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.
Vehicles with an alarm
( P. 8 7 ) :
Confirm that the electronic key
is being carried.
When connecting the jumper (or
booster) cables, depending on the
situation, the alarm may activate
and doors locked. ( P. 89)
Open the hood. (P. 634)
Remove the engine cover.
Pull up the both ends of the cover
vertically.
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 retailer or Toyota autho-
rized repairer, or any reliable repairer.
1
2
3

7588-2. Steps to take in an emergency
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■When recharging or replacing the 12-volt battery
● In some cases, it may not be possible to unlock the doors using the smart
entry & start system when the 12-volt battery is discharged. Use the wire-
less remote control or the mechanical key to lock or unlock the doors.
● The hybrid system may not start on the first attempt after the 12-volt battery
has recharged but will start normally after the second attempt. This is not a
malfunction.
● It may be impossible to unlock the charging port lid or locking and unlocking
the charging connector immediately after the 12-volt battery is reconnected.
In this case, carry the electronic key on your person and operate the
charging port lid or charging connector lock switch again.
● The power switch mode is memorized by the vehicle. When the 12-volt bat-
tery is reconnected, the system will return to the mode it was in before the
12-volt battery was discharged. Before disconnecting the 12-volt battery,
turn the power switch off.
If you are unsure what mode the power switch was in before the 12-volt bat-
tery discharged, be especially careful when reconnecting the 12-volt battery.
● If the 12-volt battery discharges while the shift position is in P, it may not be
possible to shift the shift position to other positions. In this case, the vehicle
cannot be towed without lifting both front wheels because the front wheels
will be locked. ( P. 707)
■ When replacing the 12-volt battery
● Use a 12-volt battery that conforms to European regulations.
● Use a 12-volt battery that the case size is same as the previous one (LN1),
20 hour rate capacity (20HR) is equi valent (45Ah) or greater, and perfor-
mance rating (CCA) is equivalent (295A) or greater.
• If the sizes differ, the 12-volt battery cannot be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehi-
cle is not used is a short time, the 12-volt battery may discharge and the
hybrid system may not be able to start.
● For details, consult any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.

7859-2. Customization
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
9
Vehicle specifications
■Power windows (P. 352)
■Reverse warning buzzer (P. 382)
■Turn signal lever (P. 385)
FunctionDefault
settingCustomized
setting
Mechanical key linked opera-
tion (open)Off On – – O
Mechanical key linked opera-
tion (close)Off On – – O
Wireless remote control linked
operation (open)Off On – – O
Wireless remote control linked
operation (close)Off On – – O
Mechanical key, wireless
remote control linked opera-
tion signal (buzzer)On Off – – O
123
FunctionDefault
settingCustomized
setting
Signal (buzzer) when the shift
position is in RSingleIntermittent––O
123
FunctionDefault
settingCustomized
setting
Times of flashing of the lane
change signal flashers3Off
––O 5
7
123

7909-2. Customization
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Illumination (P. 591)
■Charge settings
■Maintenance system
FunctionDefault
settingCustomized
setting
Time elapsed before the inte-
rior lights turn off15 secondsOff
–OO 7.5 seconds
30 seconds
Operation after the power
switch is turned offOnOff––O
Operation when the doors are
unlockedOnOff––O
Operation when you approach
the vehicle with the electronic
key on your person
OnOff––O
Footwell lighting On Off – – O
Interior lights illumination con-
trolOn Off – – O
123
Charge scheduleSetting the charging schedule: P. 179
Charge currentChanging the upper limit of the charging cur-
rent: P. 150
Traction battery heaterSetting “Traction Battery Heater” on/off:
P. 155
Tire pressure warning
systemInitializing the tire pressure warning system:
P. 651

794What to do if... (Troubleshooting)
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be
made by any authorized Toyota retailer or Toyota authorized repairer, or
any reliable repairer. (P. 279)
●If you lose your electronic keys, the risk of vehicle theft increases signifi-
cantly. Contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer immediately. (P. 282)
●Is the electronic key battery weak or depleted? (P. 688)
●Is the power switch in ON mode?
When locking the doors, turn the power switch off. (P. 375)
●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. 296)
●Is the child-protector lock set?
The rear door cannot be opened from inside the vehicle when the lock is
set. Open the rear door from outside and then unlock the child-protector
lock. (P. 286)
If you have a problem, check the following before contacting any
authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer.
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

795What to do if... (Troubleshooting)
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
●Did you press the power switch while firmly depressing the brake pedal?
( P. 373)
●Is the shift position in P? (P. 380)
●Is the electronic key anywhere detectable inside the vehicle? (P. 294)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way.
( P. 752)
●Is the 12-volt battery discharged? (P. 755)
●Is the window lock switch pressed?
The power windows except for the one at the driver’s seat cannot be oper-
ated if the window lock switch is pressed. ( P. 352)
●The auto power off function will be operated if the vehicle is left in
ACCESSORY or ON mode (the hybrid system is not operating) for a
period of time. ( P. 3 7 5 )
If you think something is wrong
The hybrid system does not start
The windows do not open or close by operating the power
window switches
The power switch is turned off automatically

796What to do if... (Troubleshooting)
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
●The seat belt reminder light is flashing
Are the driver and all the passengers wearing the seat belts? (P. 720)
●The parking brake indicator is on
Is the parking brake released? (P. 386)
Depending on the situation, other types of warning buzzer may also sound.
(P. 714, 723)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (P. 87)
To stop the alarm, turn the power switch to ON mode or start the hybrid sys-
tem.
●Is the electronic key left inside the vehicle?
Check the message on the multi-information display. (P. 723)
●When a warning light turns on or a warning message is displayed, refer to
P. 714, 723.
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
(vehicles with alarm)
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

800Alphabetical index
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Care ................................... 616, 622
Aluminum wheels .................. 617
Exterior.................................. 616
Front camera......................... 408
Interior ................................... 622
Radar sensor ........................ 407
Seat belts .............................. 625
Water-repellent coating ......... 617
Catch protection function ....... 353
Chains ....................................... 567
Charging ................................... 121
Charging cable ...................... 126
Charging equipment.............. 121
Charging indicator ................. 125
Charging messages .............. 197
Charging precautions ............ 172
Charging procedure .............. 165
Charging time may
increase .............................. 154
Charging schedule
function ............................... 176
High voltage components ..... 108
Information related to
charging display.................. 159
Opening and closing the
charging port lid .................. 122
Power sources
precautions ......................... 151
Power sources that can be
used.................................... 149
Safety functions ............ 161, 171
Solar charging system .......... 188
When normal charging
cannot be carried out.......... 192
Charging cable ......................... 126
CCID (Charging Circuit
Interrupting Device) ............ 126
Charging cable types ............ 127If the charging cable cannot
be unlocked ........................ 146
Indicator ................................ 130
Maintenance ......................... 136
Replacing the plug-cord ........ 132
Safety functions .................... 129
Charging port ........................... 121
Opening and closing ............. 122
Smart lid & connector
locking system .................... 140
If the charging port lid does
not open ............................. 143
Child restraint system ............... 54
Child restraint system
installation method ............... 67
Fixed with a seat belt .............. 68
Fixed with an ISOFIX lower
anchorage ............................ 70
Points to remember ................ 54
Riding with children................. 53
Using a top tether
anchorage ............................ 72
Child safety ................................ 53
12-volt battery precautions ... 646
Airbag precautions .................. 41
Back door precautions .......... 290
Charging precautions............ 160
Child restraint system ............. 54
How your child should wear
the seat belt.......................... 36
Installing child restraints ......... 67
Power window lock switch .... 352
Power window precautions ... 355
Rear door child-protectors .... 286
Removed key battery
precautions......................... 690
Riding with children................. 53
Seat belt precautions .............. 69
Seat heater precautions........ 589
C

802Alphabetical index
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Doors ................................ 283, 288
Back door .............................. 288
Door glasses ......................... 352
Door lock ............................... 283
Open door warning buzzer.... 286
Open door warning light ........ 717
Outside rear view mirrors ...... 350
Rear door child-protectors .... 286
Side doors ............................. 283
Side windows ........................ 352
Double locking system.............. 86
Drive information ..................... 232
Drive-Start Control................... 360
Driver’s seat belt reminder
light ......................................... 717
Driving ...................................... 358
Break-in tips .......................... 361
Correct driving posture............ 32
Driving in the rain .................. 359
Driving mode select switch ... 468
Plug-in hybrid vehicle driving
tips ...................................... 115
Procedures............................ 358
Winter drive tips .................... 566
Dynamic radar cruise control
with full-speed range ............ 451
ECB (Electronically
Controlled Brake System) .... 559
Eco drive mode ........................ 468
Electric motor (traction
motor) ....................................... 94
Location .................................. 94
Specification.......................... 773Electric Power Steering
(EPS)....................................... 560
Function ................................ 560
Warning light ......................... 715
Electronic key .......................... 278
Battery-saving function ......... 295
If the electronic key does not
operate properly ................. 751
Replacing the battery ............ 688
Electronically Controlled
Brake System (ECB) ............. 559
Emergency, in case of
If a warning buzzer sounds ... 714
If a warning light turns on...... 714
If a warning message is
displayed ............................ 723
If the 12-volt battery is
discharged .......................... 755
If the electronic key does not
operate properly ................. 751
If the hybrid system will not
start .................................... 749
If the vehicle becomes
stuck ................................... 766
If the vehicle is trapped in
rising water ......................... 706
If you have a flat tire ............. 731
If you lose your keys ..... 279, 282
If you think something is
wrong.................................. 713
If your vehicle has to be
stopped in an emergency ... 705
If your vehicle needs to be
towed .................................. 707
If your vehicle overheats ....... 761
E