Toyota 2012 Prius Owner's Manual page 307

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Selecting 12h/24h clock display
STEP 1
STEP 2
PRIUS PHV_OM_OM47818U_(U)
2-2. Instrument cluster
Select "CLOCK".
Press and hold the "DISP" button
to enter the setting mode.
Select "12h" or "24h".
Press and hold the "DISP" button
to finish setting.
2
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