Toyota Prius C 2011 Owner's Manual page 334

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Exterior
Make sure that the 12-volt battery terminals are not corroded
and that there are no loose connections, cracks, or loose
clamps.
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Installing the 12-volt battery cover
4-3. Do-it-yourself maintenance
Terminals
Hold-down clamp
Install the 12-volt battery cover
with the clips.
4
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