2022 TOYOTA PRIUS key battery

6497-2. Steps to take in an emergency
PRIUS_OM_OM47F01U_(U)
7
When trouble arises
■When recharging or replacing 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 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.
● 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 thi s case, the vehicle
cannot be towed without lifting both front wheels because the f ront wheels
will be locked. ( P. 580)
■ 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 previou s 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 se cured.
• If the 20 hour rate capacity is low, even if the time period w here 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.

696
PRIUS_OM_OM47F01U_(U)
8-2. Customization
■Vehicle customization
●When the Speed linked door locking function and the Shift posit ion linked
door locking function are both on, the door lock operates as follows.
• When shifting the shift position to any position other than P, all the doors
will be locked.
• If the vehicle is started with all the doors locked, the Speed linked door locking function would not operate.
• If the vehicle is started with any door unlocked, the Speed li nked door
locking function will operate.
● When the smart key system is off, Smart door unlocking cannot be custom-
ized.
● When the doors remain closed after unlocking the doors and the automatic
door lock function is activated, the signals will be generated in accordance
with the operation signal (buzzer) and the operation signal (emergency
flashers) settings.
■ In the following situations, customize mode will automatically be turned
off.
● A warning message appears after the customize mode screen is displayed.
● The power switch is turned off.
● The vehicle begins to move while the customize mode screen is displayed.
WARNING
■Cautions during customization
As the hybrid system needs to be operating during customization , ensure
that the vehicle is parked in a place with adequate ventilation. In a closed
area such as a garage, exhaust gases including harmful carbon monoxide
(CO) may collect and enter the vehicle. This may lead to death or a serious
health hazard.
NOTICE
■ During customization
To prevent 12-volt battery discharge, ensure that the hybrid sy stem is oper-
ating while customizing features.

716What to do if... (Troubleshooting)
PRIUS_OM_OM47F01U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be
made by your Toyota dealer. ( P. 177)
●If you lose your electronic keys, the risk of vehicle theft inc reases signifi-
cantly. Contact your Toyota dealer immediately. ( P. 180)
●Is the electronic key battery weak or depleted? (P. 555)
●Is the power switch in ON mode?
When locking the doors, turn the power switch off. ( P. 241)
●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 t he radio
wave. ( P. 194)
●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. 184)
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

717What to do if... (Troubleshooting)
PRIUS_OM_OM47F01U_(U)
●Did you press the power switch while firmly depressing the brake pedal?
(P. 239)
●Is the shift position in P? ( P. 250)
●Is the electronic key anywhere detectable inside the vehicle? ( P. 192)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way.
(P. 644)
●Is the 12-volt battery discharged? ( P. 646)
●Is the window lock switch pressed?
The power windows except for the one at the driver’s seat canno t be oper-
ated if the window lock switch is pressed. ( P. 212)
●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. 241)
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

722Alphabetical index
PRIUS_OM_OM47F01U_(U)
Bottle holders .......................... 458
BrakeFluid ...................................... 667
Parking brake........................ 256
Regenerative braking.............. 87
Warning light ......................... 588
Brake assist ............................. 415
Brake Override System ........... 223
Break-in tips ............................. 224
Brightness control Instrument cluster light
control................................. 100
BSM (Blind Spot Monitor) ....... 344 Blind Spot Monitor
function ............................... 349
Rear Cross Traffic Alert function ............................... 352
Care................................... 492, 498 Aluminum wheels.................. 493
Exterior ................................. 492
Front camera ........................ 285
Interior................................... 498
Radar sensor ........................ 284
Seat belts .............................. 499
Water-repellent coating......... 493
Cargo capacity ......................... 236
Cargo hooks............................. 462 Catch protection function....... 213
CD player
*
Chains ...................................... 426
Child restraint system............... 56
Fixed with a LATCH
system .......... ..................... ... 69
Fixed with a seat belt .............. 63
Front passenger occupant classification syst em ............ 49
Points to remember ................ 57
Riding with children ................ 55
Types of child restraint system installation method ............... 59
Using an anchor bracket......... 72
Child safety ................................ 55 12-volt battery precautions ... 522
Airbag precautions.................. 38
Back door precautions .......... 189
Child restraint system ............. 56
How your child should wear the seat belt.......................... 31
Installing child restraints ......... 59
Moon roof precautions .......... 220
Power window lock switch .... 212
Power window precautions ... 215
Rear door child-protectors .... 184
Removed key battery precautions......................... 557
Riding with children ................ 55
Seat belt extender precautions........................... 34
Seat belt precautions .............. 68
Seat heater precautions ....... 450
Child-protectors ...................... 184
C

724Alphabetical index
PRIUS_OM_OM47F01U_(U)
DoorsAutomatic door locking and
unlocking system ................ 184
Back door.............................. 187
Door glasses ......................... 212
Door lock............................... 181
Open door warning buzzer ... 185
Open door warning light........ 590
Outside rear view mirrors...... 210
Rear door child-protectors .... 184
Side doors............................. 181
Side windows ........................ 212
Drive information ..................... 126
Drive-Start Control (DSC) ....... 223 Sudden start restraint control................................. 223
Driver’s seat belt reminder
light......................................... 591
Driving ...................................... 222 Break-in tips .......................... 224
Correct driving posture ........... 28
Driving in the rain .................. 223
Driving mode select switch ... 342
Hybrid vehicle driving tips ..... 422
Procedures ........................... 222
Winter drive tips .................... 425
DSC (Drive-Start Control) ....... 223
Sudden start restraint control................................. 223
Dynamic radar cruise control
with full-speed range ............ 321
ECB (Electronically Controlled Brake System) .... 415
Eco drive mode ........................ 342
EDR (Event data recorder) ........ 11
Electric motor (traction motor) Location .................................. 84
Specification ......................... 663 Electric Power Steering
(EPS) ...................................... 416
Function ................................ 416
Warning light......................... 589
Electronic key .......................... 176
Battery-saving function ......... 194
If the electronic key does not operate properly ........... 643
Replacing the battery............ 555
Electronically Controlled Brake System (ECB) ............. 415
Emergency flashers ................ 576
Emergency tire puncture repair kit ................................. 609
Emergency, in case of If a warning buzzer sounds... 588
If a warning light turns on ..... 588
If a warning message is displayed ............................ 599
If the 12-volt battery is
discharged.......................... 646
If the electronic key does not operate properly ........... 643
If the hybrid system will not start .............................. 641
If the vehicle becomes stuck ................................... 657
If the vehicle is submerged or water on the road is
rising................................... 578
If you have a flat tire ..... 607, 627
If you lose your keys ..... 177, 180
If you think something is wrong .............................. 587
If your vehicle has to be stopped in an emergency ... 577
If your vehicle needs to be towed.................................. 580
If your vehicle overheats....... 652
Energy monitor ........ 127, 165, 170
E

727Alphabetical index
PRIUS_OM_OM47F01U_(U)
I/M test ...................................... 507
Identification ............................ 661Engine................................... 662
Vehicle .................................. 661
Ignition switch (power
switch) .................................... 239 Auto power off function ......... 241
Automatic hybrid system shut off feature ........................... 243
Changing the power switch modes................................. 241
If your vehicle has to be stopped in an emergency ... 577
Starting the hybrid system .... 239
Illuminated entry system ........ 454
Immobilizer system ................... 96
Indicators ................................. 107
Initialization .............................. 697 Items to initialize ................... 697
Maintenance data ................. 502
Moon roof.............................. 219
Parking Support Brake function ............................... 377
Power windows ..................... 213
S-APGS (Simple Advanced Parking Guidance
System) .............................. 405
Tire pressure warning system ......... ....................... 531
Inside rear view mirror ............ 208
Instrument cluster light
control .................................... 100
Interior lights............................ 452
Switch ........................... 453, 454
Wattage ................................ 670
Intuitive parking assist............ 358 Jack
Positioning a floor jack.......... 513
Vehicle-equipped
jack ............................. 609, 628
Jack handle ...................... 609, 628
Jam protection function
Moon roof ............................. 218
Power windows..................... 213
Keyless entry ........................... 182 Smart key system ................. 192
Wireless remote control ........ 182
Keys .......................................... 176
Battery-saving function ......... 194
Electronic key ....................... 176
Engine switch (power switch) ................................ 239
If the electronic key does not operate properly ........... 643
If you lose your keys ..... 177, 180
Key number plate ................. 176
Keyless entry ........................ 182
Mechanical key ..................... 177
Power switch ........................ 239
Replacing the battery............ 555
Smart key system ................. 192
Warning buzzer .................... 193
Wireless remote control ........ 182
Knee airbag ................................ 35
IJ
K
*: Refer to “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.

730Alphabetical index
PRIUS_OM_OM47F01U_(U)
Personal lights ......................... 452Switch ................................... 453
Wattage ................................ 670
Power control unit coolant ..... 518 Capacity ................................ 666
Checking ............................... 518
Preparing and checking before winter....................... 425
Radiator ................................ 520
Power outlets ........................... 468
Power steering (Electric Power Steering) ..................... 416 Function ................................ 416
Warning light ......................... 589
Power switch............................ 239 Auto power off function ......... 241
Automatic hybrid system shut off feature ........................... 243
Changing the power switch modes................................. 241
If your vehicle has to be stopped in an emergency ... 577
Starting the hybrid system .... 239
Power windows........................ 212 Catch protection function ...... 213
Door lock linked window operation ............................ 214
Jam protection function......... 213
Operation .............................. 212
Window lock switch............... 212
Pre-Collision System (PCS) .... 291 Enabling/disabling the system ......... ....................... 295
Function ................................ 291
Warning light ......................... 589
Radar cruise control Dynamic radar cruise control
with full-speed range .......... 321
Radiator .................................... 520
Radio
*
RCTA (Rear Cross Traffic Alert)....................................... 352
Blind Spot Monitor function............................... 349
Rear Cross Traffic Alert
function............................... 352
Rear Cross Traffic Alert (RCTA).................................... 352
Blind Spot Monitor function............................... 349
Rear Cross Traffic Alert
function............................... 352
Rear passengers’ seat belt reminder light ........................ 591
Rear seat .................................. 200
Rear seat reminder function... 186
Rear side marker lights........... 257 Light switch ........................... 257
Replacing light bulbs ............ 567
Wattage ................................ 670
Rear turn signal lights ............ 255 Replacing light bulbs ............ 567
Turn signal lever ................... 255
Wattage ................................ 670
Rear view mirror Inside rear view mirror .......... 208
Outside rear view mirrors ..... 210
Rear view monitor system
*
Rear window defogger .... 434, 444
Rear window wiper .................. 275
Refueling .................................. 277 Capacity................................ 663
Fuel types ............................. 663
Opening the fuel tank cap..... 279
When the fuel filler door cannot be opened .............. 280
Regenerative braking ................ 87
Replacing Electronic key battery ........... 555
Fuses .................................... 558
Light bulbs ............................ 563
Tires...................................... 627
Wiper insert .......................... 551
R