2008 Toyota Highlander Owners Manual - Page 458

4-3. Do-it-yourself maintenance Battery n Battery exterior Make sure that the battery terminals are not corroded and that there are no loose connections, cracks, or loose clamps. Terminals Hold-down clamp n Checking battery condition Check the battery condition using the indicator color. Red: Not working properly, have the battery checked by your Toyota dealer. Blue: Good condition White: Charging is necessary. Have the vehicle inspected by your Toyota dealer. 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. 430