2010 Toyota Highlander Owners Manual - Page 475

4-3. Do-it-yourself maintenance n Before recharging When recharging, the battery produces hydrogen gas which is flammable and explosive. Therefore, before recharging: l If recharging with the battery installed on the vehicle, be sure to disconnect the ground cable. l Make sure the power switch on the charger is off when connecting and disconnecting the charger cables to the battery. n After recharging the battery (vehicles with smart key system) The engine may not start. Follow the procedure below to initialize the system. STEP 1 Shift the shift lever to P. STEP 2 Open and close any of the doors. STEP 3 Restart the engine. CAUTION n Chemicals in the battery A 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 battery: l Do not cause sparks by touching the battery terminals with tools. l Do not smoke or light a match near the battery. l Avoid contact with eyes, skin and clothes. l Never inhale or swallow electrolyte. l Wear protective safety glasses when working near the battery. l Keep children away from the battery. n Where to safety charge the battery Always charge the battery in an open area. Do not charge the battery in a garage or closed room where there is not sufficient ventilation. 450