2007 Hyundai Sonata Owner's Manual - Page 236

DO-IT-YOURSELF MAINTENANCE 6 25 CHECKING ELECTRIC COOLING FANS G220A01A-AAT ! WARNING: Always read the following instructions carefully when handling a battery. Keep lighted cigarettes and all other flames or sparks away from the battery. Hydrogen, which is a highly combustible gas, is always present in battery cells and may explode if ignited. Keep batteries out of the reach of children because batteries contain highly corrosive SULFURIC ACID. Do not allow battery acid to contact your skin, eyes, clothing or paint finish. If any electrolyte gets into 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 until medical attention is received. ! WARNING: If electrolyte gets on your skin, thoroughly wash the contacted area. If you feel a pain or a burning sensation, get medical attention immediately. Wear eye protection when charging or working near a battery. Always provide ventilation when working in an enclosed space. ! WARNING: The cooling fan is controlled by engine coolant temperature and may sometimes operate even when the engine is not running. Use extreme caution when working near the blades of the cooling fan, so that you are not injured by a rotating fan blade. As the engine coolant temperature decreases the fan will automatically shut off. This is a normal condition. o When lifting a plastic-cased battery, excessive pressure on the case may cause battery acid to leak, resulting in personal injury. Lift with a battery carrier or with your hands on opposite corners. o Never attempt to charge the battery when the battery cables are connected. o The electrical ignition system works with high voltage. Never touch these components with the engine running or the ignition switched on. G220B01NF-GAT Checking Engine Cooling Fan The engine cooling fan should come on automatically if the engine coolant temperature is high or whenever the air conditioning is in operation.