TOYOTA 2011 Prius - Manual (Page 469)

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4-3. Do-it-yourself maintenance
PRIUS_U (OM47685U) DVD
Washer fluid
Open the lid.
Check the washer fluid level on
the level gauge.
“NORMAL”
“LOW”
NOTICE
n If the fluid level is low
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.
STEP 1
STEP 2