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PCM Clock is slow

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Old 11-08-2020, 11:35 AM
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jw1977
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Default PCM Clock is slow

I took my 2015 C2S in for service last week, since then then time that shows up on the PCM is 15 minutes slow. It was incorrect on the gauges as well but I corrected that, however it's still showing slow on teh PCM. I held down he Info button to reset the PCM but it did not correct the problem. Any other suggestions?
Old 11-16-2020, 05:19 PM
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jungkim1234
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I've never had this issue, but do use the MF steering wheel (or stalks) and set the time using the GPS clocks.https://rennlist.com/forums/991/1136...ings-time.html
Old 11-16-2020, 05:30 PM
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JW911
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There's a way to sync it to satellite time. I think IIRC there's a box that is supposed to be checked in the MFD somewhere.
Old 11-16-2020, 10:03 PM
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jw1977
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I'll double check that, thanks guys.
Old 11-16-2020, 10:45 PM
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LexVan
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Don't forget E equals m c squared. So, as you are approaching the speed of light, easy to do in a 991, you are compressing time. And that causes your clock to run slow.
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Old 11-17-2020, 09:58 AM
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Jim M.
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I had the same thing happen. When I took it in for service, I mentioned it and it was correct when I picked it up. But I don't know what they did to correct it.
Old 11-17-2020, 10:21 AM
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Driveby
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Originally Posted by LexVan
Don't forget E equals m c squared. So, as you are approaching the speed of light, easy to do in a 991, you are compressing time. And that causes your clock to run slow.
True. Technically the faster you drive the longer you will live. From the perspective of those you leave at home.
Old 11-17-2020, 11:56 AM
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asellus
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Originally Posted by Driveby
True. Technically the faster you drive the longer you will live. From the perspective of those you leave at home.
But in reality you're in a nightmarish rubber band loop of aging slowly then aging extra fast as you drive away then drive back!
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Old 11-17-2020, 03:29 PM
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jw1977
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Checked it out and the GPS wasn't checked, did it and now it works. Thanks for the help.



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