key battery TOYOTA PRIUS V 2012 (in English) User Guide

386 4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
■After recharging/reconnecting the 12-volt battery
● Unlocking the doors using the smart key system may not be possible
immediately after reconnecting the 12-volt battery. If this happens, use
the wireless remote control or the mechanical key to lock/unlock the
doors.
● Start the hybrid system with the “POWER” switch in ACCESSORY mode.
The hybrid system may not start with the “POWER” switch turned off.
However, the hybrid system will operate normally from the second
attempt.
● The “POWER” switch mode is recorded by the vehicle. If the 12-volt bat-
tery is reconnected, the vehicle will return the “POWER” switch mode to
the status it was in before the 12-volt battery was disconnected. Make
sure to turn off the power before disconnect the 12-volt battery. Take
extra care when connecting the 12-volt battery if the “POWER” switch
mode prior to discharge is unknown.
● Restart the hybrid system, depress the brake pedal, and confirm that it is
possible to shift into each shift position.
If the system will not start even after multiple attempts at all methods above,
contact your Toyota dealer.
CAUTION
■ Chemicals in the 12-volt battery
The 12-volt battery contains poisonous and corrosive sulfuric acid and may
produce hydrogen gas which is flammable and explosive. To reduce the risk
of death or serious injury, take the following precautions while working on or
near the 12-volt battery:
● Do not cause sparks by touching the 12-volt battery terminals with tools.
● Do not smoke or light a match near the 12-volt battery.
● Avoid contact with eyes, skin and clothes.
● Never inhale or swallow electrolyte.
● Wear protective safety glasses when working near the 12-volt battery.
● Keep children away from the 12-volt battery.

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4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
Electronic key batter y
Replace the battery with a new one if it is depleted.
■You will need the following items:
●Flathead screwdriver
● Lithium battery CR1632
■ Replacing the battery
Take out the mechanical key.
Remove the cover.
To prevent damage, cover the
tip of the screwdriver with a
rag.
Remove the depleted battery.
Insert a new battery with the
“+” terminal facing up.
STEP 1
STEP 2
ITO43P194
STEP 3

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4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
4
Maintenance and care
■
Use a CR1632 lithium battery
● Batteries can be purchased at your Toyota dealer, local electrical appli-
ance shops or camera stores.
● Replace only with the same or equivalent type recommended by the
manufacturer.
● Dispose of used batteries according to local laws.
■ If the electronic key battery is depleted
The following symptoms may occur:
● The smart key system and wireless remote control will not function prop-
erly.
● The operational range will be reduced.
CAUTION
■Removed battery and other parts
Keep away from children. These parts are small and if swallowed by a child,
they can cause choking. Failure to do so could result in death or serious
injury.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
● Always work with dry hands.
Moisture may cause the battery to rust.
● Do not touch or move any other component inside the remote control.
● Do not bend either of the battery terminals.

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4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
4
Maintenance and care
FUSEAmpereCircuit
30 MIR HTR 10A Outside rear view mirror defoggers
31 RAD NO.1 15A Audio system, navigation system
32 DOME 10ADoor courtesy lights, personal
lights, interior lights, front foot
lights, vanity lights, inside rear
view mirror, garage door opener,
overhead console
33 ECU-B 7.5ASmart key system, multiplex com-
munication system, personal
lights, gauges and meters, occu-
pant detection system (ECU and
sensors)
34 H-LP LH HI 10A Left-hand headlight (high beam)
35 H-LP RH HI 10A Right-hand headlight (high beam)
36 EFI NO.2 10AMultiport fuel injection system/
sequential multiport fuel injection
system
37 IGCT NO.3 10A Cooling system
38 SPARE 30A Spare fuse
39 SPARE 10A Spare fuse
40 SPARE 7.5A Spare fuse
41 EFI MAIN 20AMultiport fuel injection system/
sequential multiport fuel injection
system, EFI NO.2
42 BATT FAN 10A Battery cooling fan
43 IG2 20AMultiport fuel injection system/
sequential multiport fuel injection
system, MET-IGN, IGN, hybrid
system

When trouble arises5
435
PRIUS v_U (OM47784U)
5-1. Essential informationEmergency flashers ......... 436
If your vehicle needs to be towed ............................. 437
If you think something is wrong ............................. 443
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds ........................... 444
If you have a flat tire......... 462
If the hybrid system will not start .......................... 476
If you lose your keys ........ 478
If the electronic key does not operate properly....... 479
If the 12-volt battery is discharged ..................... 481
If your vehicle overheats ....................... 487
If the vehicle becomes stuck .............................. 491
If your vehicle has to be stopped in an
emergency ..................... 493

5
When trouble arises
437
5-1. Essential information
PRIUS v_U (OM47784U)
If your vehicle needs to be towed
Before towingThe following may indicate a problem with your hybrid transmission.
Contact your Toyota dealer before towing.
● The hybrid system is operating but the vehicle will not move.
● The vehicle makes an abnormal sound.
If there is a malfunction in the P position control system, the smart
key system or the immobilizer system , or if the 12-volt battery is dis-
charged, the vehicle cannot be tow ed with the front wheels on the
ground, as the front wheels may be locked. In this case, transport the
vehicle with both front wheels or all four wheels lifted.
If towing is necessary, we recommend having your vehicle towed by
your Toyota dealer or a commerci al towing service, using a lift-type
truck or flat bed truck.
Use a safety chain system for all to wing, and abide by all state/pro-
vincial and local laws.

476
5-2. Steps to take in an emergency
PRIUS v_U (OM47784U)
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the
situation. Check the following a nd perform the appropriate proce-
dure:
■ The hybrid system will not start even though the correct
starting procedure is being followed ( P. 175)
One of the following may be the cause of the problem:
● The electronic key may not be functioning properly.
*
(  P. 479)
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● There may be a malfunction in the immobilizer system.
*
(  P. 1 1 9 )
● There may be a malfunction in the P position control system.
*
( P. 180, 447, 448)
*: It may not be possible to shift the shift position from P to another
position.
■ The interior lights and headlight s are dim, or the horn does
not sound or sounds at a low volume
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 481)
● The 12-volt battery terminal c onnections may be loose or cor-
roded.

5
When trouble arises
479
5-2. Steps to take in an emergency
PRIUS v_U (OM47784U)
If the electronic key does not operate properly
Locking and unlocking the doorsUse the mechanical key (P. 54)
in order to perform the following
operations:
Locks all the doors
Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again within 3 seconds
unlocks the other doors.
If communication between the electronic key and vehicle is inter-
rupted ( P. 65) or the electronic key cannot be used because the
battery is depleted, the smart key system and wireless remote con-
trol cannot be used. In such cases, the doors can be opened and the
hybrid system can be started by following the procedure below.

480 5-2. Steps to take in an emergency
PRIUS v_U (OM47784U)
Changing “POWER” switch modes and starting the hybrid
systemDepress the brake pedal. Touch the Toyota emblem side of
the electronic key to the
“POWER” switch.
If any of the doors is opened or
closed while the key is being
touched to the switch, an alarm
will sound to indicate that the start
function cannot detect the elec-
tronic key.
Perform the following operations.
To change “POWER” switch modes: Within 10 seconds of the
buzzer sounding, release the brake pedal and press the
“POWER” switch. Modes can be changed each time the
switch is pressed. ( P. 177)
To start the hybrid system: Press the “POWER” switch within
10 seconds of the buzzer soun ding, keeping the brake pedal
depressed.
In the event that the hybrid system still cannot be operated, contact
your Toyota dealer.
STEP 1
STEP 2
■ 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. 408)
STEP 3

552
PRIUS v_U (OM47784U)
Alphabetical index
Alphabetical index
A/CAir conditioning filter ..............405
Automatic air conditioning
system ................................280
ABS ...........................................252
Air conditioning filter............... 405
Air conditioning system Air conditioning filter ..............405
Automatic air conditioning
system ................................280
Steering wheel climate remote control switches ......293
Airbags Airbag operating conditions............................ 128
Airbag precautions for your child .................................... 132
Airbag warning light............... 446
Curtain shield airbag operating
conditions............................ 128
Curtain shield airbag
precautions .........................132
Front passenger occupant classification system ...........138
General airbag precautions ...132
Knee airbag ...........................124
Locations of airbags ..............124
Modification and disposal of airbags ................................137
Proper driving posture ...........122
Side airbag operating
conditions............................ 128
Side airbag precautions ........ 132
Side and curtain shield airbags
operating conditions............128
Side and curtain shield airbags
precautions .........................132
SRS airbags .......................... 124
SRS airbag instructions for Canadian owners. ............... 538 Antenna .................................... 354
Anti-lock brake system ........... 252
Armrest ..................................... 321
Audio input
*
Audio remote control
switches
*
Audio system*
Audio/video system*
Automatic air conditioning system Air conditioning filter.............. 405
Air conditioning system ......... 280
Automatic air conditioning system ................................ 280
Steering wheel climate
remote control switches ...... 293
Automatic headlight leveling system .................................... 220
Automatic light control system .................................... 213
AUX port
*
Auxiliary box .................... 312, 329
Back door
Back door ................................ 79
Smart key system .. ................. 57
Wireless remote control .......... 72
Back-up lights Replacing light bulbs ............. 421
Wattage................................. 506
Battery Checking ............................... 384
If the 12-volt battery is
discharged .......................... 481
Preparing and checking
before winter ....................... 273
A
B