2015 TOYOTA PRIUS PLUG-IN HYBRID battery

478 4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
■After charging/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.

479
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
4
Maintenance and care
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.
■ Where to safely charge the 12-volt battery
Always charge the 12-volt battery in an open area. Do not charge the 12-volt
battery in a garage or closed room where there is insufficient ventilation.
■ How to charge the 12-volt battery
Only perform a slow charge (5 A or less). The 12-volt battery may explode if
charged at a quicker rate.

480 4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
CAUTION
■Emergency measures regarding electrolyte
●If electrolyte gets in your eyes
Flush your eyes with clean water for at least 15 minutes and get immedi-
ate medical attention. If possible, continue to apply water with a sponge or
cloth while traveling to the nearest medical facility.
● If electrolyte gets on your skin
Wash the affected area thoroughly. If you feel pain or burning, get medical
attention immediately.
● If electrolyte gets on your clothes
It can soak through clothing on to your skin. Immediately take off the cloth-
ing and follow the procedure above if necessary.
● If you accidentally swallow electrolyte
Drink a large quantity of water or milk. Get emergency medical attention
immediately.
■ When replacing the 12-volt battery
Use a 12-volt battery designed for this vehicle. Failure to do so may ca\
use
gas (hydrogen) to enter the passenger co mpartment, causing a fire or explo-
sion.
For replacement of the 12-volt battery, contact your Toyota dealer.
NOTICE
■ When charging the 12-volt battery
Never charge the 12-volt battery while the hybrid system is operating. Also,
be sure all accessories are turned off.

497
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
4
Maintenance and care
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.
When installing, reverse the steps listed.
STEP 1
STEP 2
ITO43P194
STEP 3
STEP 4

498 4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
■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
These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. 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.

505
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
4
Maintenance and care
FUSEAmpereCircuit
41 SPARE 30A Spare fuse
42 SPARE 10A Spare fuse
43 SPARE 7.5A Spare fuse
44 EFI MAIN 20AMultiport fuel injection system/
sequential multiport fuel injection
system, cooling system, EFI NO.2
45 BATT FAN 20A Battery cooling fan
46 IG2 20AMultiport fuel injection system/
sequential multiport fuel injection
system, MET, IGN, power man-
agement system

When trouble arises5
527
PRIUS PHV_OM_OM47A11U_(U)
5-1. Essential informationEmergency flashers ......... 528
If your vehicle needs to be towed ........................ 529
If you think something is wrong ............................. 536
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds ........................... 537
If a warning message is displayed........................ 550
If you have a flat tire......... 574
If the hybrid system will not start .................... 596
If you lose your keys ........ 598
If the electronic key does not operate properly....... 599
If the 12-volt battery is discharged ..................... 601
If your vehicle overheats ....................... 607
If the vehicle becomes stuck .............................. 613
If your vehicle has to be stopped in an
emergency ..................... 615

528
PRIUS PHV_OM_OM47A11U_(U)
5-1. Essential information
Emergency flashers
■Emergency flashers
If the emergency flashers are used for a long time while the hybrid system is
not operating (while the “READY” indi cator is not illuminated), the 12-volt
battery may discharge.
The emergency flashers are used to warn other drivers when the
vehicle has to be stopped in the road due to a breakdown, etc.
Press the switch.
All the turn signal lights will
flash.
To turn them off, press the
switch once again.