2003 Lexus LS 430 Owners Manual - Page 404

ELECTRICAL COMPONENTS Checking battery exterior NOTICE D Make sure the engine and all accessories are turned off before performing maintenance. 64L085a D When checking the battery, remove the ground cable first and reinstall it last. D Be careful not to cause a short circuit with tools. D Take care no solution gets into the battery when washing it. " 1 Terminals 2 Hold−down clamp Check the battery for corroded or loose connections, cracks, or loose hold−down clamps. 1. If the battery is corroded, wash it off with a solution of warm water and baking soda. Coat the terminals with grease to prevent further corrosion. 2. If the connections are loose, tighten the clamp bolts − but do not overtighten. 3. Tighten the hold−down clamp only enough to keep the battery firmly in place. Overtightening may damage the battery case. 390