If your vehicle overheats When “ EV System overheated Output power reduced” is shown on the multi-information display, your vehicle may be overheating. Notice: Cooling system coolant The radiator coolant is exclusive for radiator usage. Damage may occur when water or any other type of coolant is used, so never use any other fluid. When there is no “Toyota Genuine Traction Battery Coolant”, immediately contact your Toyota dealer. Correction procedures Stop the vehicle in a safe place and turn off the air conditioning system. Leave the EV system operating and carefully lift the hood. Check if the cooling fan is operating. If the fan is operating: Wait until the “ EV System overheated Output power reduced” message disappears and then stop the EV system. If the message does not disappear, call your Toyota dealer.If the fan is not operating: Stop the EV system immediately and call your Toyota dealer. After the EV system has cooled down, inspect the hoses and radiator core (radiator) for any leaks. Radiator Cooling fan If a large amount of coolant leaks, immediately contact your Toyota dealer. The coolant level is satisfactory if it is between the “ MAX” and “ MIN” lines on the reservoir. Reservoir “ MAX” line “ MIN” line If the coolant is insufficient, replenish with “Toyota Genuine Traction Battery Coolant”. If you don’t have “Toyota Genuine Traction Battery Coolant”, contact your Toyota dealer. Remove the bolt. Open the reservoir cap Have the vehicle inspected at the nearest your Toyota dealer. Warning: To prevent an accident or injury when inspecting under the hood of your vehicle Observe the following precautions. Failure to do so may result in serious injury such as burns. If steam is seen coming from under the hood, do not open the hood until the steam has subsided. The motor compartment may be very hot. Keep hands and clothing (especially a tie, a scarf or a muffler) away from the fan. Failure to do so may cause the hands or clothing to be caught, resulting in serious injury. Do not loosen the coolant reservoir cap while the EV system and radiator are hot. High temperature steam or coolant could spray out. Notice: When adding coolant Add coolant slowly after the EV system has cooled down sufficiently. Adding cool coolant to a hot EV system too quickly can cause damage to the EV system. To prevent damage to the cooling system Observe the following precautions: Avoid contaminating the coolant with foreign matter (such as sand or dust, etc.). Do not use water or any other coolant when refilling coolant. Also, do not use any additive agents for the coolant.