If the 12-volt battery is discharged The following procedures may be used to start the EV system if the vehicle’s 12-volt battery is discharged.You can also call your Toyota dealer or a qualified repair shop. Restarting the EV system If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt battery, you can jump start your vehicle by following the steps below. Confirm that the electronic key is being carried. When connecting the jumper (or booster) cables, depending on the situation, the alarm may activate and the doors locked. (Alarm-operated door lock) Open the hood (Opening the hood). Open the positive (+) battery terminal cover. While pressing on the claw, open the cover as shown in the illustration. Connect a positive jumper cable clamp to on your vehicle and connect the clamp on the other end of the positive cable to on the second vehicle. Then, connect a negative cable clamp to on the second vehicle and connect the clamp at the other end of the negative cable to . Use jumper cables that can reach the specified terminals and connecting point. Positive (+) battery terminal (your vehicle) Positive (+) battery terminal (second vehicle) Negative (-) battery terminal (second vehicle) Metallic point shown in the illustration Start the engine of the second vehicle. Increase the engine speed slightly and maintain at that level for approximately 5 minutes to recharge the 12-volt battery of your vehicle. Open and close any of the doors of your vehicle with the power switch OFF. Maintain the engine speed of the second vehicle and start the EV system of your vehicle by turning the power switch to ON. Make sure the “ READY” indicator comes on. If the indicator light does not come on, contact your Toyota dealer. Once the EV system has started, remove the jumper cables in the exact reverse order from which they were connected. Close the positive (+) battery terminal cover. Once the EV system starts, have the vehicle inspected at your Toyota dealer as soon as possible. Note: Starting the EV system when the 12-volt battery is discharged The EV system cannot be started by push-starting. To prevent 12-volt battery discharge Turn off the headlights, the air conditioning system, the audio system, etc. while the EV system is off. Turn off any unnecessary electrical components when the vehicle is running at a low speed for an extended period, such as in heavy traffic. Charging the 12-volt battery The electricity stored in the 12-volt battery will discharge gradually even when the vehicle is not in use, due to natural discharge and the draining effects of certain electrical appliances. If the vehicle is left for a long time, the 12-volt battery may discharge, and the EV system may be unable to start. (The 12-volt battery recharges automatically while the EV system is operating.) When the 12-volt battery is removed or discharged Information stored in the ECU is cleared. When the 12-volt battery is depleted, have the vehicle inspected at your Toyota dealer. In some cases, it may not be possible to unlock the doors using the smart key system when the 12-volt battery is discharged. Use the wireless remote control or the mechanical key to lock or unlock the doors. The EV system may not start on the first attempt after the 12-volt battery has recharged but will start normally after the second attempt. This is not a malfunction. The power switch mode is memorized by the vehicle. When the 12-volt battery is reconnected, the system will return to the mode it was in before the 12-volt battery was discharged. Before disconnecting the 12-volt battery, turn the power switch off.If you are unsure what mode the power switch was in before the 12-volt battery discharged, be especially careful when reconnecting the 12-volt battery. If the 12-volt battery discharges, it may not be possible to shift the shift position to other positions. In this case, the vehicle cannot be towed without lifting both front wheels because the front wheels will be locked. The power back door (if equipped) must be initialized. (When reconnecting the 12-volt battery) Battery (12-volt battery) Replacing When replacing the 12-volt battery Use a 12-volt battery that conforms to European regulations. Use a 12-volt battery that the case size is same as the previous one (LN1), 20 hour rate capacity (20HR) is equivalent (45Ah) or greater, and performance rating (CCA) is equivalent (286A) or greater. If the sizes differ, the 12-volt battery cannot be properly secured. If an improper 12-volt battery is used, battery performance may decrease and the EV system may not be able to restart. If the 20 hour rate capacity is low, even if the time period where the vehicle is not used is a short time, the 12-volt battery may discharge and EV system may not be able to start. For details, consult your Toyota dealer. Warning: When removing the 12-volt battery terminals Always remove the negative (-) terminal first. If the positive (+) terminal contacts any metal in the surrounding area when the positive (+) terminal is removed, a spark may occur, leading to a fire in addition to electrical shocks and death or serious injury. Avoiding 12-volt battery fires or explosions Observe the following precautions to prevent accidentally igniting the flammable gas that may be emitted from the 12-volt battery: Make sure each jumper cable is connected to the correct terminal and that it is not unintentionally in contact with any other than the intended terminal. Do not allow the other end of the jumper cable connected to the “ +” terminal to come into contact with any other parts or metal surfaces in the area, such as brackets or unpainted metal. Do not allow the + and - clamps of the jumper cables to come into contact with each other. Do not smoke, use matches, cigarette lighters or allow open flame near the 12-volt battery. Child safety 12-volt battery precautions 12-volt battery precautions The 12-volt battery contains poisonous and corrosive acidic electrolyte, while related parts contain lead and lead compounds. Observe the following precautions when handling the 12-volt battery: When working with the 12-volt battery, always wear safety glasses and take care not to allow any battery fluids (acid) to come into contact with skin, clothing or the vehicle body. Do not lean over the 12-volt battery. In the event that battery fluid (acid) comes into contact with the skin or eyes, immediately wash the affected area with water and seek medical attention.Place a wet sponge or cloth over the affected area until medical attention can be received. Always wash your hands after handling the 12-volt battery and other battery-related parts. Do not allow children near the 12-volt battery. When replacing the 12-volt battery When the vent plug is close to the hold down clamp, the battery fluid (acid) may leak. For information regarding battery replacement, contact your Toyota dealer. Notice: When handling jumper cables When connecting the jumper cables, ensure that they do not become entangled in the cooling fan. When connecting jumper cables Make sure to connect jumper cables to the specified terminals and connecting point. Failure to do so may adversely affect the electronic devices or damage to them.