Toyota Prius: 12-volt battery

• Location
• Removing the 12-volt battery cover

Location

In the Toyota Prius, the 12-volt battery is located on the right-hand side of the luggage compartment.

Before recharging

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

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 ACC. 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 battery 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 switch 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.

If the hybrid system will not start even after multiple attempts at all methods above, contact your Toyota dealer.

WARNING

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.

WARNING

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.

Emergency measures regarding electrolyte

• If electrolyte gets in your eyes Flush your eyes with clean water for at least 15 minutes and get immediate 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 clothing 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 there is insufficient 12- volt battery fluid

Do not use if there is insufficient fluid in the 12-volt battery. There is a possible danger that the 12- volt battery may explode.

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.

Removing the 12-volt battery cover

Vehicle with high deck: Open the deck board

2. Hold the handle and pull it toward you, and then the 3 clips will be disengaged

3. Taking out the 12-volt battery cover.

When installing, reverse the steps listed.

Exterior

Make sure that the 12-volt battery terminals are not corroded and that there are no loose connections, cracks, or loose clamps.

1. Terminals
2. Hold-down clamp

Checking the battery condition (if equipped)

Check the battery condition by indicator color.

1. Blue: Good condition
2. Red: Charging is necessary.

   Have the vehicle inspected by your Toyota dealer.

3. Clear: Replacement is necessary.

Have the vehicle inspected by your Toyota dealer.