key battery TOYOTA PRIUS 2018 (in English) Owner's Manual

724
PRIUS_OM_OM47B89U_(U)
8-2. Steps to take in an emergency
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. 726)
● 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. 234, 690)
● 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. 725)
● There is a possibility that the temperature of the hybrid battery
(traction battery) is extremely low (approximately below -22°F
[-30°C]). ( →P. 84, 234)
*: 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. 729)
● The 12-volt battery terminal con nections may be loose or corroded.
( → P. 6 1 1 )
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. 231)
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

726
PRIUS_OM_OM47B89U_(U)
8-2. Steps to take in an emergency
If the electronic key does not operate
properly
Use the mechanical key (→P. 167) 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: This setting must be customized at your Toyota dealer. ( →P. 770)
If communication between the electronic key and vehicle is
interrupted ( →P. 184) 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 hybrid system can be started by
following the procedure below.
Locking and unlocking the doors
1
2
3
4

7288-2. Steps to take in an emergency
PRIUS_OM_OM47B89U_(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. 646)
■ 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. 233)
■ 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. 770)
● Check if battery-saving mode is set. If it is set, cancel the function.
(→P. 184)
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

7328-2. Steps to take in an emergency
PRIUS_OM_OM47B89U_(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 whee\
ls
will be locked. ( →P. 666)
■ 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 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_OM_OM47B89U_(U)
7799-2. 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. 592
Tire pressure warning
systemInitializing the tire pr essure warning system:
→ P. 6 2 0

798What to do if... (Troubleshooting)
PRIUS_OM_OM47B89U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be
made by your Toyota dealer. ( →P. 167)
●If you lose your electronic keys, the risk of vehicle theft increases signifi-
cantly. Contact your Toyota dealer immediately. ( →P. 170)
●Is the electronic key battery weak or depleted? (→P. 646)
●Is the power switch in ON mode?
When locking the doors, turn the power switch off. ( →P. 233)
●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. 184)
●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. 174)
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

799What to do if... (Troubleshooting)
PRIUS_OM_OM47B89U_(U)
●Did you press the power switch while firmly depressing the brake pedal?
(→P. 231)
●Is the shift position in P? ( →P. 241)
●Is the electronic key anywhere detectable inside the vehicle? ( →P. 182)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way.
(→P. 727)
●Is the 12-volt battery discharged? ( →P. 729)
●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. 204)
●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. 233)
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

804Alphabetical index
PRIUS_OM_OM47B89U_(U)
Bluetooth® audio ..................... 472
Bluetooth® phone .................... 474
Deleting the call history......... 494
Making a call ......................... 477
Managing the contacts.......... 490
Message function.................. 484
Phone settings ...................... 489
Receiving a call..................... 480
Speaking on the phone ......... 481
Bottle holders .......................... 543
Brake Fluid ...................................... 751
Parking brake........................ 247
Regenerative braking.............. 80
Warning light ......................... 673
Brake assist ............................. 408
Brake Override System ........... 215
Break-in tips ............................. 216
Brightness control Instrument cluster
light control ........................... 94
BSM (Blind Spot Monitor) ....... 326
Care Aluminum wheels.................. 583
Camera sensor ..................... 277
Exterior ................................. 582
Interior................................... 588
Radar sensor ........................ 276
Seat belts .............................. 589
Water-repellent coating......... 583
Cargo capacity ......................... 228
Catch protection function ....... 205 Cargo hooks ............................ 547
CD player.................................. 444
Chains ...................................... 419
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 ... 612
Airbag precautions.................. 39
Back door precautions .......... 179
Child restraint system ............. 58
How your child should wear the seat belt ................. 31
Installing child restraints ......... 61
Moon roof precautions .......... 211
Power window lock switch .... 204
Power window precautions ... 206
Rear door child-protectors .... 174
Removed key battery precautions......................... 648
Riding with children ................ 57
Seat belt extender precautions........................... 35
Seat belt precautions .............. 70
Seat heater precautions ....... 536
Child-protectors ...................... 174
C

806Alphabetical index
PRIUS_OM_OM47B89U_(U)
DoorsAutomatic door locking
and unlocking system ......... 174
Back door.............................. 177
Door glasses ......................... 204
Door lock............................... 171
Open door warning buzzer................................. 675
Open door warning light........ 675
Outside rear view mirrors...... 202
Rear door child-protectors .... 174
Side doors............................. 171
Drive information ..................... 116
Drive-Start Control .................. 216
Driver’s seat belt reminder light......................................... 675
Driving
Break-in tips .......................... 216
Correct posture ....................... 28
Driving in the rain .................. 215
Driving mode select switch ................................. 324
Hybrid vehicle driving tips ..... 415
Procedures ........................... 214
Winter drive tips .................... 418
Dynamic radar cruise control with full-speed range ............ 304
ECB (Electronically Controlled Brake System) .... 408
Eco drive mode ........................ 324
EDR (Event data recorder) .............. 11
Electric motor Location .................................. 78
Specification ......................... 747 Electric Power Steering (EPS)
Function ................................ 408
Warning light......................... 674
Electronic key If the electronic key does
not operate properly ........... 726
Replacing the battery............ 646
Electronically Controlled
Brake System (ECB) ............. 408
Emergency flashers ................ 664
Emergency, in case of If a warning buzzer sounds................................ 673
If a warning light turns on ..... 673
If a warning message is
displayed ............................ 684
If the 12-volt battery is
discharged.......................... 729
If the electronic key does not operate properly ........... 726
If the hybrid system will not start .............................. 724
If you have a flat tire ............. 691
If you lose your keys ..... 167, 170
If you think something
is wrong .............................. 672
If your vehicle becomes
stuck ................................... 740
If your vehicle has to be stopped in an
emergency ......................... 665
If your vehicle needs to be towed.................................. 666
If your vehicle overheats....... 735
Energy monitor ........ 117, 153, 158
E

809Alphabetical index
PRIUS_OM_OM47B89U_(U)
I/M test ...................................... 597
IdentificationEngine................................... 746
Vehicle .................................. 745
Ignition switch
(Power switch) ....................... 231 Auto power off function ......... 233
Changing the power switch modes...................... 233
If your vehicle has to be stopped in an
emergency.......................... 665
Starting the hybrid system .... 231
Illuminated entry system ........ 540
Immobilizer system ................... 89
Indicators ................................. 100
Initialization
Intelligent Clearance Sonar .................................. 360
Items to initialize ................... 780
Maintenance data ................. 592
Moon roof.............................. 210
Power windows ..................... 205
S-APGS (Simple Advanced
Parking Guidance
System) .............................. 388
Tire pressure warning
system ......... ....................... 621
Inside rear view mirror ............ 200
Instrument cluster light control ...................................... 94
Intelligent Clearance Sonar .... 350
Interior lights............................ 538 Switch ........................... 539, 540
Wattage ................................ 754
Intuitive parking assist............ 339 Jack
Positioning a floor jack.......... 603
Vehicle-equipped
jack ............................. 692, 707
Jack handle ...................... 692, 707
Jam protection function
Moon roof ............................. 209
Power windows..................... 205
Keyless entry Smart key system ................. 182
Wireless remote control ........ 166
Keys .......................................... 166
Electronic key ....................... 166
Engine switch ....................... 231
If the electronic key does not operate properly ........... 726
If you lose your keys ..... 167, 170
Key number plate ................. 166
Keyless entry ........................ 166
Keys...................................... 166
Mechanical key ..................... 166
Power switch ........................ 231
Replacing the battery............ 646
Warning buzzer .................... 183
Wireless remote control key...................................... 166
Knee airbags .............................. 36
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