key battery TOYOTA PRIUS 2016 4.G Owner's Manual

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PRIUS_OM_OM47A29U_(U)
8-2. Steps to take in an emergency
If the hybrid system will not star t
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly.
* ( P. 708)
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. ( P. 84)
● There may be a malfunction in the immobilizer system.
* ( P. 8 9 )
● There may be a malfunction in the shift control system.
*
(  P. 228, 671)
● 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. 707)
● There is a possibility that the temperature of the hybrid battery
(traction battery) is extremely low (approximately below -22°F
[-30°C]). ( P. 84, 228)
*: 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. 7 1 1 )
● The 12-volt battery terminal con nections may be loose or corroded.
(  P. 598)
Reasons for the hybrid system not starting vary depending on
the situation. Check the follo wing and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 225)
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

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PRIUS_OM_OM47A29U_(U)
8-2. Steps to take in an emergency
If the electronic key does not operate
properly
Use the mechanical key (P. 161) in order to perform the following
operations:
Locks all the doors
Closes the windows and moon
roof
*1 (turn and hold)*2
Unlocks the door
Opens the windows and moon
roof
*1 (turn and hold)*2
Turning the key rearward unlocks
the driver’s door. Turning the key
once again within 3 seconds
unlocks the other doors.
*1: If equipped
*2: These settings must be customized at your Toyota dealer. ( P. 752)
If communication between the electronic key and vehicle is
interrupted ( P. 178) 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 hybr id system can be started by
following the procedure below.
Locking and unlocking the doors
1
2
3
4

7108-2. Steps to take in an emergency
PRIUS_OM_OM47A29U_(U)
■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 immediately when the battery is depleted.
( P. 628)
■ 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 key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features: P. 752)
● Check if battery-saving mode is set. If it is set, cancel the function.
(P. 178)
WARNING
■ When using the mechanical key an d operating the power windows or
moon roof (if equipped)
Operate the power window or moon roof after checking to make sure that
there is no possibility of any passenger having any of their body parts
caught in the window or moon roof.
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 or moon
roof.
3

7148-2. Steps to take in an emergency
PRIUS_OM_OM47A29U_(U)■
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.
● 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. 648)
■ When exchanging the 12-volt battery
●Use a 12-volt battery that conforms to European regulations.
● Use a 12-volt battery with the same case size as the previous 12-volt battery
and an equivalent 20 hour rate capacity (20HR) 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_OM_OM47A29U_(U)
7599-2. Customization
9
Vehicle specifications
■Vehicle customization
●When the Speed linked door locking function and the Shift position 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 linked 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, customiz e 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.
■
Maintenance system
WARNING
■ Cautions during customization
As the hybrid system needs to be oper ating 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 system is oper-
ating while customizing features.
Oil Maintenance
(U.S.A. only)Resetting the message indicating maintenance
is required:  P. 579
Tire pressure warning
systemInitializing the tire pr essure warning system:
 P. 6 0 7

778What to do if... (Troubleshooting)
PRIUS_OM_OM47A29U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be
made by your Toyota dealer. (P. 161)
●If you lose your electronic keys, the risk of vehicle theft increases signifi-
cantly. Contact your Toyota dealer immediately. ( P. 164)
●Is the electronic key battery weak or depleted? (P. 628)
●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. 178)
●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. 168)
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

779What to do if... (Troubleshooting)
PRIUS_OM_OM47A29U_(U)
●Did you press the power switch while firmly depressing the brake pedal?
( P. 225)
●Is the shift position in P? ( P. 235)
●Is the electronic key anywhere detectable inside the vehicle? ( P. 176)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way.
( P. 709)
●Is the 12-volt battery discharged? ( P. 711)
●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. 198)
●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. 227)
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

783Alphabetical index
PRIUS_OM_OM47A29U_(U)
AntennaSmart key system ................. 176
Radio .................................... 439
Anti-lock brake system (ABS) ...................................... 404
Function ................................ 404
Warning light ......................... 656
Approach warning ................... 309
Armrest ..................................... 552
Assist grips .............................. 553
Audio input............................... 425
Audio system
(Entune Audio) ...................... 421Antenna ................................ 439
Audio input ............................ 425
AUX port ............................... 456
Basic operations ................... 426
Bluetooth
® audio................... 468
CD player .............................. 440
iPod....................................... 446
MP3/WMA disc ..................... 440
Optimal use........................... 437
Portable music player ........... 425
Radio .................................... 438
Steering wheel audio switches.............................. 424
USB memory ........................ 451
Audio system (Entune Premium Audio with Navigation)
*
Automatic air conditioning systemAir conditioning filter ............. 621
Automatic air conditioning system ......... ....................... 512
Climate control ...................... 516
Eco score (A/C score)........... 136
Fresh air intake system......... 516
Humidity sensor .................... 519
Settings screen ..................... 515
S-FLOW mode ...................... 514 Automatic door locking
and unlocking systems ........ 168
Automatic High Beam ............. 247
Automatic light control system.................................... 245
AUX port ................................... 425
Auxiliary boxes ........................ 532
Back door ................................. 171
Back-up lights Replacing light bulbs ............ 639
Wattage ................................ 736
Battery (12-volt battery)
Battery checking ................... 598
If the 12-volt battery is discharged.......................... 711
Preparing and checking before winter ...................... 414
Warning light......................... 655
Battery (traction battery) .......... 82
Blind Spot Monitor (BSM) ....... 322
Bluetooth
®............................... 499
Audio system ....... ................. 468
Hands-free system (for cellular phone) ............. 470
Registering/removing
a Bluetooth
® device ........... 462
Selecting a Bluetooth®
device ................................. 464
Wireless communication....... 457
B
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

784Alphabetical index
PRIUS_OM_OM47A29U_(U)
Bluetooth® audio ..................... 468
Bluetooth® phone .................... 470
Deleting the call history......... 490
Making a call ......................... 473
Managing the contacts.......... 486
Message function.................. 480
Phone settings ...................... 485
Receiving a call..................... 476
Speaking on the phone ......... 477
Bottle holders .......................... 530
Brake Fluid ...................................... 733
Parking brake........................ 241
Regenerative braking.............. 80
Warning light ......................... 655
Brake assist ............................. 404
Brake Override System ........... 209
Break-in tips ............................. 210
Brightness control Instrument cluster
light control ........................... 94
BSM (Blind Spot Monitor) ....... 322
Care Aluminum wheels.................. 569
Camera sensor ..................... 271
Exterior ................................. 568
Interior................................... 574
Radar sensor ........................ 270
Seat belts .............................. 575
Water-repellent coating......... 569
Cargo capacity ......................... 222
Catch protection function ....... 199
Cargo hooks............................. 534 CD player.................................. 440
Chains ...................................... 415
Child restraint system............... 58
Fixed with a LATCH system .......... ..................... ... 71
Fixed with a seat belt .............. 65
Front passenger occupant classification syst em ............ 50
Points to remember ................ 59
Riding with children ................ 57
Types of child restraint system installation
method ................................. 61
Using an anchor
bracket ................................. 74
Child safety ................................ 57 12-volt battery precautions ... 599
Airbag precautions.................. 39
Back door precautions .......... 173
Child restraint system ............. 58
How your child should
wear the seat belt ................. 31
Installing child restraints ......... 61
Moon roof precautions .......... 205
Power window lock switch .... 198
Power window precautions ... 200
Rear door child-protectors .... 168
Removed key battery
precautions......................... 630
Riding with children ................ 57
Seat belt extender
precautions........................... 35
Seat belt precautions .............. 70
Seat heater precautions ....... 523
C

786Alphabetical index
PRIUS_OM_OM47A29U_(U)
DoorsAutomatic door locking
and unlocking system ......... 168
Back door.............................. 171
Door glasses ......................... 198
Door lock............................... 165
Open door warning buzzer ... 657
Open door warning light........ 657
Outside rear view mirrors...... 196
Rear door child-protectors .... 168
Side doors............................. 165
Drive information ..................... 116
Drive-Start Control .................. 210
Driver’s seat belt reminder light......................................... 658
Driving Break-in tips .......................... 210
Correct posture ....................... 28
Driving in the rain .................. 209
Driving mode select switch ... 320
Hybrid vehicle driving tips ..... 411
Procedures ........................... 208
Winter drive tips .................... 414
Dynamic radar cruise control with full-speed range ............ 300 ECB (Electronically
Controlled Brake System) .... 404
Eco drive mode........................ 320
EDR (Event data recorder) .............. 11
Electric motor Location .................................. 78
Specification ......................... 729
Electric Power Steering (EPS) Function ................................ 404
Warning light......................... 656
Electronic key If the electronic key does not operate properly ........... 708
Replacing the battery............ 628
Electronically Controlled Brake System (ECB) ............. 404
Emergency flashers ................ 646
Emergency, in case of If a warning buzzer sounds... 655
If a warning light turns on ..... 655
If a warning message is displayed ............................ 665
If the 12-volt battery is discharged.......................... 711
If the electronic key does not operate properly ........... 708
If the hybrid system will not start .............................. 706E