
6978-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47A88U_(U)
8
When trouble arises
■When recharging or repl acing the 12-volt battery
● In some cases, it may not be possible 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 attempt after the 12-volt battery
has recharged but will start normally after the second attempt. This is not a
malfunction.
● Vehicles with smart lid & connector locking system:
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 whee\
ls
will be locked. ( →P. 646)
■ When exchanging 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 equivalent (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 your Toyota dealer.

PRIUS PRIME_OM_OM47A88U_(U)
7359-2. Customization
9
Vehicle specifications
■HUD (Head-up display)* (→ P. 238)
*: If equipped
■
Door lock ( →P. 267, 690)
■Smart key system and wireless remote control ( →P. 268, 278)
FunctionDefault
settingCustomized setting
Route guidance*OnOffO––
123
FunctionDefault settingCustomized setting
Automatic door lockingShift position linkedSpeed linked–OO
Off–OO
Automatic door unlockingShift position linkedDriver’s door linked–OO
Off–OO
Unlocking using a mechanical
key
Driver’s door unlocked in
first step, all
doors
unlocked in
second step
All doors
unlocked in first step
––O
123
FunctionDefault settingCustomized setting
Operation signal (buzzer) 5Off
–OO
1 to 7
Operation signal (emergency
flashers) On
Off – O O
Time elapsed before the auto-
matic door lock function is
activated if a door is not
opened after being unlocked
60 seconds
Off
–OO30 seconds
120 seconds
Open door reminder buzzer
(when locking the vehicle)OnOff––O
123

736
PRIUS PRIME_OM_OM47A88U_(U)
9-2. Customization
■Smart key system (→P. 278)
*: This function can also be changed using the wireless remote control.
(→P. 271)
■
Wireless remote control ( →P. 268)
FunctionDefault
settingCustomized setting
Smart door unlocking*Driver’s doorAll the doors–OO
Smart key systemOnOff––O
Time elapsed before unlock-
ing all the door when gripping
and holding the driver’s door
handle
2 seconds
Off
––O1.5 seconds
2.5 seconds
Number of consecutive door
lock operations2 timesAs many as
desired––O
123
FunctionDefault settingCustomized setting
Unlocking operation
Driver’s door unlocked in
first step, all
doors
unlocked in
second step
All doors
unlocked in first step
–OO
Wireless remote control On Off – – O
Locking operation when door
opened On Off – – O
123

PRIUS PRIME_OM_OM47A88U_(U)
7379-2. Customization
9
Vehicle specifications
■Power windows (→P. 300)
■Reverse warning buzzer (→ P. 333)
■Turn signal lever (→P. 336)
FunctionDefault
settingCustomized setting
Mechanical key linked opera-
tion (open)OffOn––O
Mechanical key linked opera-
tion (close)OffOn––O
Wireless remote control linked
operation (open only)OffOn––O
Mechanical key, wireless
remote control linked opera-
tion signal (buzzer)
OnOff––O
123
FunctionDefault settingCustomized setting
Signal (buzzer) when the shift
position is in RIntermittentSingle––O
123
FunctionDefault settingCustomized setting
Times of flashing of the lane
change signal flashers3
Off
––O5
7
123

740
PRIUS PRIME_OM_OM47A88U_(U)
9-2. Customization
■Remote Air Conditioning System (→P. 509)
■Illumination ( →P. 515)
*: If equipped
FunctionDefault
settingCustomized setting
Operation using the “A/C” but-
ton on the wireless remote
controlPress and
hold for 0.8 seconds
Press once
––O
Press twice
Press and
hold for 2.4
seconds
Off
Stopping the operation using
the “A/C” button on the wire-
less remote control
Press twice
Press once
––O
Press and
hold for 0.8 seconds
Press and
hold for 2.4
seconds
Off
123
FunctionDefault settingCustomized setting
Time elapsed before the inte-
rior lights turn off 15 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*OnOff––O
Interior lights illumination con-
trolOnOff––O
123

767Alphabetical index
PRIUS PRIME_OM_OM47A88U_(U)
Approach warning ................... 400
Assist grips .............................. 540
Audio input
*
Audio system*
Automatic air conditioning system ..... 488, 498 Air conditioning eco mode .......................... 490, 501
Air conditioning filter ............. 620
Automatic air conditioning system .... 488, 498
Eco score (A/C score)........... 228
Humidity sensor ............ 494, 505
Remote Air Conditioning System ............................... 509
S-FLOW mode .............. 489, 500
Automatic door locking
and unlocking systems ........ 270
Automatic High Beam ............. 343
Automatic light control system .................................... 341
AUX port
*
Auxiliary boxes ........................ 522
Back door ................................. 273
Back-up lights .......................... 635 Replacing light bulbs............. 636
Wattage ................................ 717
Battery (12-volt battery) .......... 587
Battery checking ................... 587
Exchanging ........................... 697
If the 12-volt battery is discharged .......................... 694
Preparing and checking before winter....................... 482
Warning light ......................... 653 Battery (traction battery) .......... 90
Air intake vent ......................... 91
Charging ............................... 102
Location .................................. 90
Specification ......................... 711
Status indicator ..................... 104
Blind Spot Monitor (BSM) ....... 408 Blind Spot Monitor function... 412
Rear Cross Traffic Alert
function............................... 415
Bluetooth
®*
Bottle holders .......................... 521
Brake Fluid ...................................... 716
Parking brake ....................... 337
Regenerative braking ............. 86
Warning light......................... 653
Brake assist ............................. 476
Brake Override System ........... 308
Break-in tips............................. 309
Brightness control Instrument cluster light control ......................... 182
BSM (Blind Spot Monitor) ....... 408 Blind Spot Monitor function... 412
Rear Cross Traffic Alert function............................... 415
Care .................................. 556, 561 Aluminum wheels ................. 557
Camera sensor ..................... 365
Exterior ................................. 556
Interior .................................. 561
Radar sensor ........................ 364
Seat belts.............................. 564
Water-repellent coating ........ 557
B
C
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

773Alphabetical index
PRIUS PRIME_OM_OM47A88U_(U)
I/M test ...................................... 573
Identification ............................ 709Engine................................... 710
Vehicle .................................. 709
Ignition switch
(power switch) ....................... 324 Auto power off function ......... 326
Changing the power switch modes...................... 326
If your vehicle has to be stopped in an emergency ... 645
Starting the hybrid system .... 324
Illuminated entry system ........ 517
Immobilizer system ................... 75
Indicators ................................. 188
Initialization .............................. 743 Intelligent Clearance
Sonar .................................. 439
Items to initialize ................... 743
Maintenance data ................. 568
Power windows ..................... 301
S-APGS (Simple Advanced Parking Guidance
System) .............................. 466
Tire pressure warning system ......... ....................... 596
Inside rear view mirror ............ 296
Instrument cluster light
control .................................... 182
Intelligent Clearance Sonar .... 430
Interior lights............................ 515
Switch ........................... 516, 517
Wattage ................................ 717
Intuitive parking assist............ 420 Jack .......................................... 610
Positioning a floor jack.......... 579
Vehicle-equipped jack .......... 610
Jack handle .............................. 610
Jam protection function ......... 301
Keyless entry ........................... 262 Smart key system ................. 278
Wireless remote control ........ 262
Keys .......................................... 262
Battery-saving function ......... 280
Electronic key ....................... 262
Engine switch ....................... 324
If the electronic key does not operate properly ........... 690
If you lose your keys ..... 263, 266
Key number plate ................. 262
Keyless entry ........................ 262
Keys...................................... 262
Mechanical key ..................... 263
Power switch ........................ 324
Replacing the battery............ 627
Smart key system ................. 278
Warning buzzer .................... 279
Wireless remote control key...................................... 262
Knee airbags .............................. 36
IJ
K
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

776Alphabetical index
PRIUS PRIME_OM_OM47A88U_(U)
Power control unit coolant ..... 584Capacity ................................ 714
Checking ............................... 584
Preparing and checking before winter....................... 482
Radiator ................................ 586
Power outlets ........................... 531
Power sources ......................... 122
Power steering (Electric Power Steering system) ....... 477 Function ................................ 477
Warning light ......................... 654
Power switch............................ 324 Auto power off function ......... 326
Changing the power
switch modes...................... 326
If your vehicle has to be
stopped in an emergency ... 645
Starting the hybrid system .... 324
Power windows........................ 300
Catch protection function ...... 301
Door lock linked window operation ............................ 302
Jam protection function......... 301
Operation .............................. 300
Window lock switch............... 300
Pre-Collision System (PCS) .... 369
Enabling/disabling the system ......... ....................... 373
Function ................................ 369
Warning light ......................... 654 Radar cruise control
(dynamic radar cruise
control with full-speed
range) ..................................... 391
Radiator .................................... 586
Radio
*
Rear passengers’ seat belt reminder light ........................ 656
Rear seat .................................. 289
Rear side marker lights........... 338 Light switch ........................... 338
Replacing light bulbs ............ 640
Rear turn signal lights ............ 336 Replacing light bulbs ............ 640
Turn signal lever ................... 336
Rear view mirror Inside rear view mirror .......... 296
Outside rear view mirrors ..... 298
Rear view monitor system
*
Rear window defogger .... 491, 502
Refueling .................................. 356 Capacity................................ 710
Fuel types ............................. 710
Opening the fuel tank cap..... 358
When the fuel filler door cannot be opened .............. 359
Regenerative braking ................ 86
Remote Air Conditioning
System ................................... 509
Replacing
Electronic key battery ........... 627
Fuses .................................... 630
Light bulbs ............................ 635
Tires...................................... 609
Wiper rubber ......................... 624
Reporting safety defects
for U.S. owners...................... 746
Resetting the message indicating maintenance is
required.................................. 568
Road accident cautions ............ 94
R