Get Maintenance and care -> 12-volt battery Guide for Toyota Prius 4 Door Third Generation (2010-2015)

4-3. Do-it-yourself m aintenanc e

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

STEP

1

Open the center deck board. (P. 374)

STEP

2

Remove the center auxiliary box. (P. 376)

Remove the side deck board

STEP

3

and 12-volt battery cover.

4

Remove the 12-volt battery

maintenance cover.

STEP

4

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4-3. Do-it-yourself maintenance

■ Exterior

Make sure that the 12-volt battery terminals are not corroded

and that there are no loose connections, cracks, or loose

clamps.

Terminals

Hold-down clamp

■Before recharging

When recharging, the 12-volt battery produces hydrogen gas which is flam-

mable and explosive. Therefore, observe the following precautions before

recharging:

●If recharging with the 12-volt battery installed on the vehicle, be sure to

disconnect 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.

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4-3. Do-it-yourself maintenance

■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.

4

If the system will not start even after multiple attempts at all methods above,

contact your Toyota dealer.

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4-3. Do-it-yourself maintenance

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 recharge 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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4-3. Do-it-yourself maintenance

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

4

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.

435

4-3. Do-it-yourself maintenance

CAUTION

■When disconnecting the 12-volt battery

Do not disconnect the negative (-) termi-

nal on the body side as shown. The dis-

connected negative (-) terminal may

touch the positive (+) terminal, which may

cause a short and result in death or seri-

ous injury.

NOTICE

■When recharging the 12-volt battery

Never recharge 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 -> 12-volt battery for Your Toyota Prius 4 Door Third Generation (2010-2015)

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