battery TOYOTA PRIUS PLUG-IN 2012 Manual PDF

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4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47818U_(U)
4
Maintenance and care
12-volt batter y
■Location
The 12-volt battery is located
in the right-hand side of lug-
gage compartment.
■Removing the 12-volt battery cover
Open the center deck board. (→P. 4 0 3 )
Remove the side deck board.
Remove the auxiliary box.
STEP 1
STEP 2
STEP 3

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■Before charging
When charging, the 12-volt battery produces hydrogen gas which is flamma-
ble and explosive. Therefore, observe the following precautions before
charging:
●If charging with the 12-volt battery installed on the vehicle, be sure to dis-
connect the ground cable.
●Make sure the power switch on the charger is off when connecting and
disconnecting the charger cables to the 12-volt battery.
Remove the 12-volt battery
maintenance cover.
■Exterior
Make sure that the 12-volt battery terminals are not corroded
and that there are no loose connections, cracks, or loose
clamps.
Te r m i n a l s
Hold-down clamp
STEP 4

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Maintenance and care
■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 “POW ER” swi tc h in ACC ESSORY 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.

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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.

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Maintenance and care
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 cause
gas (hydrogen) to enter the passenger compartment, 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.

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Maintenance and care
Electronic key batter y
Replace the battery with a new one if it is depleted.
■Yo u w i l l n e e d t h e f o l l o w i n g i t e m s :
●Flathead screwdriver
●Lithium battery CR1632
■Replacing the battery
Ta k e o u t t h e m e c h a n i c a l k e y.
Remove the cover.
To p r e v e n t d a m a g e , c o v e r t h e
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

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■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.

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Maintenance and care
FUSEAmpereCircuit
43 SPARE 7.5A Spare fuse
44 EFI MAIN 20A
Multiport fuel injection system/
sequential multiport fuel injection
system, cooling system, EFI NO.2
45 BATT FAN 20A Battery cooling fan
46 IG2 20A
Multiport fuel injection system/
sequential multiport fuel injection
system, MET, IGN, power man-
agement system

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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” indicator 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 t u r n t h e m o f f , p r e s s t h e
switch once again.

5
When trouble arises
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5-1. Essential information
PRIUS PHV_OM_OM47818U_(U)
If your vehicle needs to be towed
Before towing
The 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 towed 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 commercial towing service, using a lift-type
truck or flat bed truck.
Use a safety chain system for all towing, and abide by all state/pro-
vincial and local laws.