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"C6 from 2005-2010 navigation radio clock stops after battery disconnect

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"C6 from 2005-2010 navigation radio clock stops after battery disconnect

 
Old Yesterday, 10:26 AM
  #761  
leres
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Originally Posted by harryjam View Post
My clock is still working. GPS is working. The year on my GPS is 1/3/2001 . Other than that everything is fine.
What part number is your radio? The first post in this thread shows how to get to the diag screen: Pretty Sure You Can Now Pull OBD2 Diagnostic Codes From OEM Nav Screen (pics)

Originally Posted by compyelc4 View Post
But his clock was already toast before he left ACC on and killed battery. After jump it was fresh bread.
The battery voltage doesn't go to zero when ACC runs the battery down so it could have been that his radio never completely lost power.
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Old Yesterday, 12:15 PM
  #762  
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Originally Posted by FatsWaller View Post
Just musing out loud here, and I can't go back and read through all the posts, so maybe this has already been said. When was the first instance of this problem reported? If we go with April 08 as the date when the GPS week number goes from 1023 to 0, and go back to Oct 15, 2018, then if I did the math correctly, the GPS week number would have been 999. I've seen some pretty incompetent programmers in my time, and the kludges they come up with boggle the mind. If for some reason they were converting the week number and using a 3 digit field to store the value, there would have been a problem when the week number became 1000. Then the problems might have started occurring on Oct 22, especially if they were storing some reference point in volatile memory. Remove power, and the volatile memory contents are lost, and on startup, the NAV unit can't correctly compute the date and display time. There's no doubt that the NAV systems must still be receiving and parsing the GPS signals, otherwise they wouldn't function at all. To me, it's more of a problem in converting and displaying the Date / Time from the GPS signals.
I agree! See post #656 and 674.
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Old Yesterday, 02:25 PM
  #763  
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Went for a short drive today. Glanced at the clock an it's working again. the time was off by two hours but I was able to reset to the correct time. It does appear that the GPS time is off one or two hours depending on daylight saving time
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Old Yesterday, 02:29 PM
  #764  
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Originally Posted by scummins06 View Post
Went for a short drive today. Glanced at the clock an it's working again. the time was off by two hours but I was able to reset to the correct time. It does appear that the GPS time is off one or two hours depending on daylight saving time
How about the date??? 2001???
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Old Yesterday, 06:34 PM
  #765  
Rocketman7
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Absolute complete and total BS. Completely unacceptable that GM would not have anticipated this problem or would not have it fixed since this first surfaced. Absolute garbage. If this happened in my department people would be gone. In fact I would have been gone by now would have been my expectation.

Last edited by Rocketman7; Yesterday at 06:36 PM.
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Old Yesterday, 06:51 PM
  #766  
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Sunday December 31st 2000. Well at least I have a clock & Navigation works.2 out of 3 is better than nothing. Most of the time I know what the date is without looking!!
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Old Yesterday, 08:01 PM
  #767  
tommyc6z06
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This was just the required impetus to upgrade to a contemporary head unit with Bluetooth, CarPlay and front/back cameras.
And this, from someone who rarely even listens to music in this car as I prefer the engine sounds. But no clock is a deal breaker.
And BTW, all manufacturers suck when a car is out of warranty and a gen or two older
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Old Today, 11:01 AM
  #768  
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Me too. Recently woke my '07 from its winter nap and found the same "clock not working" problem. I disconnect the battery and connect a battery minder to for the winter. I'll stay tuned to see if a fix is discovered.
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