12-volt battery Location The 12-volt battery is located in the left-hand side of the rear seat under. Note: 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 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 disconnecting the 12-volt battery. Take extra care when connecting the 12-volt battery if the power switch mode prior to discharge is unknown. When the 12-volt battery is reconnected, start 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, contact your Toyota dealer. Warning: Child safety 12-volt battery precautions 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. Emergency measures regarding electrolyte If electrolyte gets in your eyesFlush 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 skinWash the affected area thoroughly. If you feel pain or burning, get medical attention immediately. If electrolyte gets on your clothesIt can soak through clothing on to your skin. Immediately take off the clothing and follow the procedure above if necessary. If you accidentally swallow electrolyteDrink 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 explosion. For replacement of the 12-volt battery, contact your Toyota dealer. 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. Raising the rear seat After removing the clips, raise the bottom cushion. 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