2011 Toyota Highlander Owners Manual - Page 476

4-3. Do-it-yourself maintenance NOTICE n If the fluid level is low or high It is normal for the brake fluid level to go down slightly as the brake pads wear or when the fluid level in the accumulator is high. If the reservoir needs frequent refilling, it may indicate a serious problem. 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 fluid Check that the level is between "UPPER"/"MAX" and "LOWER"/ "MIN". "UPPER"/"MAX" "LOWER"/"MIN" If the fluid level is at or below "LOWER"/"MIN", add distilled water. 450