key battery TOYOTA PRIUS PLUS 2019 Owner's Manual

5097-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
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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. 5 1 1 )
● 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. 229, 447, 460)
● 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. 510)
*: 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. 513)
● The 12-volt battery terminal connections may be loose or corroded.
( P. 389)
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. 224)
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

5117-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
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When trouble arises
If the electronic key does not operate
properly
Use the mechanical key ( P. 141)
in order to perform the following
operations:
Locks all the doors
Unlocks all the doors
Ensure that the shift position is in P and depress the brake pedal.
Touch the Toyota emblem side
of the electronic key to the
power switch.
When the electronic key is
detected, a buzzer sounds and the
power switch will turn to ON mode.
When the smart entry & start sys-
tem is deactivated in customization
setting, the power switch will turn
to ACCESSORY mode.
Firmly depress the brake pedal and check that the smart entry &
start system indicator light (green) turns on (vehicles without multi-
information display) or is shown on the multi-information
display (vehicles with multi-information display).
If communication between the electronic key and vehicle is inter-
rupted ( P. 156) 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

5127-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
Press the power switch.
In the event that the hybrid system still cannot be operated, contact
any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer.
■ 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. 417)
■ 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. 104)
■ 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. 227)
■ 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. 539)
● Check if battery-saving mode is set. If it is set, cancel the function.
( P. 155)
4
3

5137-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
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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 alarm ( P. 104):
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. 106)
Open the hood (P. 375) 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 retailer or Toyota autho-
rized repairer, or any reliable repairer.
1
2
3

5157-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
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When trouble arises
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
Maintain the engine speed of the second vehicle and start the
hybrid system of your vehicle by turning the power switch to ON
mode.
Make sure the “READY” indicator comes on. If the indicator light
does not come on, contact any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
Once the hybrid system has started, remove the jumper cables in
the exact reverse order from which they were connected.
Close the exclusive jump starting terminal cover, and reinstall the
fuse box cover to its original position.
When installing, first hook the fuse box cover onto the two rear tabs.
Once the hybrid system starts, have the vehicle inspected at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer as soon as possible.
■ Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■ To prevent 12-volt battery discharge
● Turn off the headlights and the audio system while the hybrid system is off.
● Turn off any unnecessary electrical 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
● 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.
● 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 battery discharged, be especially careful when recon-
necting the 12-volt battery.
5
6
7
8
9

548What to do if... (Troubleshooting)
PRIUS +_OM_OM47D30E_(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. 141)
●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. 143)
●Is the electronic key battery weak or depleted? (P. 417)
●Is the power switch in ON mode?
When locking the doors, turn the power switch off. (P. 227)
●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. 156)
●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. 147)
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

549What to do if... (Troubleshooting)
PRIUS +_OM_OM47D30E_(EE)
●Did you press the power switch while firmly depressing the brake pedal?
( P. 224)
●Is the shift position in P? (P. 224)
●Is the electronic key anywhere detectable inside the vehicle? (P. 153)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way.
( P. 5 1 1 )
●Is the 12-volt battery discharged? (P. 513)
●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. 208)
●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. 2 2 8 )
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

554Alphabetical index
PRIUS +_OM_OM47D30E_(EE)
Card holder............................... 350
Care
Aluminum wheels .................. 363
Exterior.................................. 362
Interior ................................... 367
Panoramic roof...................... 366
Radar sensor ........................ 262
Seat belts .............................. 368
Cargo hooks ............................. 351
CD player
*
Chains ....................................... 328
Child restraint system ............... 59
Baby seat definition................. 60
Baby seat installation .............. 68
Child seat definition................. 60
Child seat installation .............. 70
Installing CRS with ISOFIX
rigid anchors ......................... 74
Installing CRS with seat belt ... 68
Installing CRS with top strap ... 76
Junior seats definition ............. 60
Junior seat installation ............ 72
Child safety ................................ 58
12-volt battery precautions.... 391
Airbag precautions .................. 48
Back door precautions .......... 150
Child restraint system ............. 59
How your child should wear
the seat belt .......................... 42
Installing child restraints.......... 67
Power window lock switch .... 208
Power window precautions ... 210Rear door child-protectors .... 147
Removed key battery
precautions......................... 418
Seat belt precautions .............. 44
Seat heater precautions........ 341
Child-protectors....................... 147
Cleaning
Aluminum wheels.................. 363
Exterior ................................. 362
Interior................................... 367
Panoramic roof ..................... 366
Radar sensor ........................ 262
Seat belts .............................. 368
Climate remote control ........... 340
Clock ......................................... 355
Condenser ................................ 386
Console box ............................. 346
Coolant
Capacity ................................ 532
Checking ............................... 385
Preparing and checking
before winter....................... 327
Cooling system ........................ 385
Hybrid system overheating ... 518
Consumption screen ............... 134
Cruise control
Cruise control........................ 313
Dynamic radar cruise
control................................. 299
Cup holders.............................. 347
Curtain shield airbags ............... 46
Customizable features ............ 539
C

555Alphabetical index
PRIUS +_OM_OM47D30E_(EE)
Daytime running light
system .................................... 242
Defogger
Outside rear view mirrors ...... 335
Rear window ......................... 335
Windshield ............................ 335
Dimension ................................ 526
Display
Drive information ................... 128
Dynamic radar cruise
control................................. 299
Energy monitor............... 128,134
LDA (Lane Departure
Alert) ................................... 284
Multi-information display ....... 126
RSA (Road Sign Assist) ........ 295
Trip information ..................... 121
Warning messages ............... 458
Do-it-yourself maintenance .... 373
Door courtesy lights ................ 342
Location ................................ 342
Wattage................................. 536
Doors
Back door .............................. 148
Door glasses ......................... 208
Door lock ............................... 144
Open door warning buzzer.... 449
Open door warning light ........ 449
Outside rear view mirrors ...... 206
Rear door child-protectors .... 147
Side doors ............................. 144
Double locking system............ 103
Drive information ..................... 128Drive-Start Control .................. 213
Driver’s seat belt reminder
light......................................... 450
Driving
Break-in tips .......................... 214
Correct posture ....................... 36
Driving in the rain .................. 213
Driving mode select switch ... 317
Hybrid vehicle driving tips ..... 324
Procedures ........................... 212
Winter drive tips .................... 327
Dynamic radar cruise control
Function ................................ 299
Warning
message ............. 459, 461, 462
ECB (Electronically
Controlled Brake System) .... 318
Eco drive mode ........................ 317
Electric motor
Location .................................. 81
Specification ......................... 529
Electric Power Steering (EPS)
Function ................................ 318
Warning light ......................... 445
Electronic key
If the electronic key does not
operate properly ................. 511
Replacing the battery ............ 417
Electronically Controlled
Brake System (ECB) ............. 318
Emergency brake signal ......... 319
Emergency flashers ................ 434
D
E
*: Refer to the “Navigation and multimedia system Owner’s Manual”.

556Alphabetical index
PRIUS +_OM_OM47D30E_(EE)
Emergency, in case of
If a warning buzzer sounds ... 444
If a warning light turns on ...... 444
If a warning message is
displayed ............................ 458
If the 12-volt battery is
discharged .......................... 513
If the electronic key does not
operate properly ................. 511
If the hybrid system will not
start..................................... 509
If the vehicle is trapped in
rising water ......................... 436
If you have a flat tire...... 478, 492
If you lose your keys ............. 143
If you think something is
wrong .................................. 443
If your vehicle becomes
stuck ................................... 523
If your vehicle has to be
stopped in an emergency ... 435
If your vehicle needs to be
towed .................................. 437
If your vehicle overheats ....... 518
Energy monitor ........................ 134Engine
Accessory mode ................... 227
Compartment ........................ 379
Engine switch........................ 224
Exhaust gas precautions ........ 80
Hood ..................................... 375
How to start the hybrid
system ................................ 224
Identification number ............ 528
If the hybrid system will not
start .................................... 509
If your vehicle has to be
stopped in an emergency ... 435
Ignition switch
(power switch) .................... 224
Overheating .......................... 518
Power switch......................... 224
Engine coolant
Capacity ................................ 532
Checking ............................... 385
Preparing and checking
before winter....................... 327
Engine coolant temperature
warning light .......................... 449