Toyota Camry 2012 Owner's Manual page 284

3-5. Other interior features
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Clock
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The clock is displayed when
Vehicles without a smart key system
The engine switch is in the "ACC" or "ON" position.
Vehicles with a smart key system
The "ENGINE START STOP" switch is in ACCESSORY or IGNITION ON
mode.
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When disconnecting and reconnecting battery terminals
The time display will automatically be set to 1:00.
300
Adjusts the hours
Adjusts the minutes