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The Pioneer DMH-W4660NEX time/clock/date should set itself using GPS signals atuomatically received as you drive the vehicle. It's typical for this to take 10-20 minutes the first time you use the vehicle after the new in-dash receiver is installed. This is a first time only thing. After the time sets itself, it will appear as you start the vehicle with little or no delay. If you have driven the vehicle for more that 30 minutes at one time, and still do not have a proper clock, time and date, I recommend to contact the installer and explain the details.
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