TOYOTA 2011 Highlander - Manual (Page 454)

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4-3. Do-it-yourself maintenance
Battery
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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
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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.
NOTICE
■
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.