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  #1  
Old 05-21-2019, 07:48 PM
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4x4 Error after sitting a few months on tender

Ok folks - my 2010 4.8i started up with a Christmas Tree dash after sitting for 4 months on a battery tender.

The transfer case ECU looks perfect and my Indy checked and cleaned the connector pins (they look fine). The actuator motor gear is good (A700 case) and the motor was swapped but issues remained. Codes return immediately when cleared. Car drives fine although I have not “tested” ABS.

Here are the codes:

Dynamic stability control - 4 wheel

Current Fault Codes
null
null
5F3A:
DSC: Transfer case and Special transmission: Malfunction
Error will cause a warning light
Error is not currently present
Test conditions have been completed

5F39:
DSC: Transfer case: internal
Error will cause a warning light
Error is not currently present
Test conditions have been completed

Electro-mechanical parking brake

Current Fault Codes

601D:
CAN RX SIGNAL STAT DSC
Error will cause a warning light
Error is not currently present
Test conditions have been completed

601E:
CAN RX SIGNAL STELLANF
Error will cause a warning light
Error is not currently present
Test conditions have been completed
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Last edited by cbracerx; 05-21-2019 at 07:55 PM.
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Old 05-21-2019, 07:59 PM
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I have the Bavarian Autosport Software and Cable. Is it possible that these codes are just not really clearing?

I can hope...
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Old 05-21-2019, 08:14 PM
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What battery tender did you use? How old is the battery? Are you sure the battery isnít bad?


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Old 05-21-2019, 08:22 PM
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Battery tender is a major brand and has worked fine on other cars. Battery age is unknown. It’s a Varta and BMW branded. No low battery warning but I haven’t checked the running voltage yet. The vehicle started right up after storage.
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Old 05-21-2019, 11:33 PM
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any evidence of rodents getting into anything?????


Look hard.
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Old 05-21-2019, 11:36 PM
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Had it on the lift and reviewed the wiring - no issues. Completely checked out the interior - no rodents.
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Old 05-22-2019, 12:39 AM
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Quote:
Originally Posted by cbracerx View Post
Battery tender is a major brand and has worked fine on other cars. Battery age is unknown. Itís a Varta and BMW branded. No low battery warning but I havenít checked the running voltage yet. The vehicle started right up after storage.

The new systems seem to divert current to the starter, and starve other components. Helps start cars when batts run low, but can result in odd errors from other modules when they dont power up properly.


In your case, through, it was on a tender...an now it is well charged and has multiple starts, with the same issues? hmmm. For $200, you prolly need one every 10 year at least..


Back to code clearing. Can you clear, then read codes without starting? Might not really be clearing them....
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Old 05-22-2019, 09:50 AM
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Iím willing to give battery replacement a try, I canít find the date code on this battery anywhere. It is an AGM battery.
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Old 05-22-2019, 10:33 AM
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Quote:
Originally Posted by cbracerx View Post
Iím willing to give battery replacement a try, I canít find the date code on this battery anywhere. It is an AGM battery.
Sticker or label on top or stamped on one of the posts. With a proper diagnostic tool you can see when the battery was registered, assuming if it has been replaced that the installer followed the proper procedure.
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Old 05-22-2019, 11:52 AM
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Battery was replaced on 11/2013 by the dealer.
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