2004 Toyota Prius Owners Manual - Page 311

Hold−down clamp Ground cable NOTICE z Be sure the hybrid system and all accessories are off before performing maintenance. After you reconnect the auxiliary battery, shift the shift lever to "N" and confirm the shift position is "N" when the "IG−ON" mode is enabled. After connecting the cables, the hybrid system may not start by pushing the "POWER" switch. In that case, push it once again. 83p001c z When checking the battery, remove the ground cable from the negative terminal ("-" mark) first and reinstall it last. z Be careful not to cause a short circuit with tools. Terminals z Take care no solution gets into the battery when washing it. If the auxiliary battery is disconnected or run down, the power window and back door may not operate automatically and the jam protection function will not function correctly and does not open the back door after you reconnect, replace or recharge the battery. In any of these cases, you should normalize each system. To normalize them, see "Power windows" on page 40 and "Back door" on page 39. Before you disconnect the auxiliary battery, confirm the shift position is "P" and apply the parking brake completely. Check the battery for corroded or loose terminal connections, cracks, or loose hold−down clamp. a. If the battery is corroded, wash it off with a solution of warm water and baking soda. Coat the outside of the terminals with grease to prevent further corrosion. b. If the terminal connections are loose, tighten their clamp nuts-but do not overtighten. c. Tighten the hold−down clamp only enough to keep the battery firmly in place. Overtightening may damage the battery case. 299