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D3 - Everything Else Anything that doesnt fit elsewhere

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  #51  
Old 4th February 2021, 09:26 PM
89forever 89forever is offline
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well the hunt for a replacement inner rear light is proving fruitless..... it WAS just the lens which needed replacing until one morning a ping on the dash..... rear bulb out (where's the OMG emoji?)



yup, half the LED's said goodbye and shuffled off.... bugger and bugger a bit more. The cost of a new replacement made even my eyes water. there are next to no secondhand ones on the market, and the small number which are are either nearly the new cost, or next to scrap..... so rebuild time it is...!!!



a quick Google and an order later and a small bag of 50 straw hat 5mm LED's arrived....



started removing.... and now on hold as ran out of time.....

once i've got the boards rebuilt i'll split the lens to rebuild that and sort out the "melted" are and clean up and reseal.

In other news a new battery arrived as the old one was not holding charge and not wanting to over work the alternator. Again a quick Goole and an order later...



locate the old one



remove and replace





of course you can't just fit them, the fact that aftermarket batteries don't come with the required BEM code etc a cheat is required..... so after going onto module 61 Battery reg, all i did was change the suffix on the part number to the next letter and the coding i increased the last number up 1.... then it's just a case of accept coding.



and now a healthy 14.6V on charging, where previously it was sat at 12.2V
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  #52  
Old 4th February 2021, 09:52 PM
S81 S81 is offline
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Regarding the battery could you give me a quick run thru on why it needs updating on vcds,it's purely a matter of interest,i've seen numerous posts but still don't understand,i'm guessing it to do with the relationship between the alternator and the battery ,(ie as the battery gets older it reduces the alternator s output voltage ?)
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Audi S8 D3 07MY 5.2 V10 Daytona Grey
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Audi A8 d4 2014 phantom black 3.0 tdi

Previously owned
Audi 80 1986 1.8 white
Audi 80 1990 2.0 red
Audi A4 1996 1.9 tdi green
Audi A6 1.9 tdi 2000 blue
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  #53  
Old 4th February 2021, 10:21 PM
89forever 89forever is offline
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The reprograming of the power module with the serial number and part number of the new battery is required because the part number tells the ecu the capacity in Ah, and the change of serial tells it to reset all parameters such as various counters, present charge state, ageing effect etc...

You may get away without doing these things, but it could result in an undercharged or overcharged battery and inaccurate battery meter reading, as well as premature or postmature entry into power saving stages and the new battery having a shortened life expectancy.

The coding instructions are on the Ross-Tech website, i also found this Spanish site useful, once it's been translated lol

https://www.audisport-iberica.com/fo...r%C3%ADas-vag/
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  #54  
Old 4th February 2021, 10:34 PM
S81 S81 is offline
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Thanks ,i'll have to give it to Audi they really know how to over complicate things
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Audi S8 D3 07MY 5.2 V10 Daytona Grey
With Bang & Olufsen Advanced Sound System, Advanced Parking System, TV Analog/ Digital, Rear/Back Window blinds, Front and rear heated seats, Alcantara Roof, Extended leather Pack 2, Extended Aluminium pack, Carbon and Aluminium trim packs, RSE, PS2.
Daily driver
Audi A8 d4 2014 phantom black 3.0 tdi

Previously owned
Audi 80 1986 1.8 white
Audi 80 1990 2.0 red
Audi A4 1996 1.9 tdi green
Audi A6 1.9 tdi 2000 blue
Audi tt 225 2000 silver
Audi s8 d2 2002 fe grey
Audi a8 4.0 tdi d3 2006 black
Audi a8 3.0 tdi d3 2010 black
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  #55  
Old 5th February 2021, 12:44 AM
ainarssems ainarssems is offline
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Quote:
Originally Posted by 89forever View Post
well the hunt for a replacement inner rear light is proving fruitless..... it WAS just the lens which needed replacing until one morning a ping on the dash..... rear bulb out (where's the OMG emoji?)



yup, half the LED's said goodbye and shuffled off.... bugger and bugger a bit more. The cost of a new replacement made even my eyes water. there are next to no secondhand ones on the market, and the small number which are are either nearly the new cost, or next to scrap..... so rebuild time it is...!!!



a quick Google and an order later and a small bag of 50 straw hat 5mm LED's arrived....



started removing.... and now on hold as ran out of time.....

once i've got the boards rebuilt i'll split the lens to rebuild that and sort out the "melted" are and clean up and reseal.

Make sure you check current running through LEDs and that it does not exceed replacement LED specifications. I used 20mA LEDs on mine an they were only lasting 2-3 weeks. When I finally checked current it was 23mA so last time I replaced them I put in extra resistors in series to get it down to just under 20mA and they have been fine for about 5 months, the cooler weather also helps, will see if they last through next summer or if I need to drop current a bit more.
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  #56  
Old 10th February 2021, 06:32 PM
89forever 89forever is offline
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well Sunday was spent looking at the light PCB



there is an issue which is still preventing it to illuminate, it will need further investigation and not currently having the time during the week and needing to have a fully functioning light array on the back of the car i took the plunge and bought another light.
It's in reasonable condition, but at least

a/ it works fully
b/ it doesn't look like it's melted internally in the reverse lens area

viewed from certain angles the plastic outer lens has some internal fracturing, so at a point in the future on a far drier day than currently i'll remove the outer lens from the original light and swap them over.....

but at least i have working lights again....



interestingly, with the defunct lamp unit plugged in it registered a fault on the warning system on the dash, without it plugged in, absolute nothing..... i found that strange
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  #57  
Old 10th February 2021, 08:41 PM
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tonupkid tonupkid is offline
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When I reattached the outer lens to the rear inner light on my D3, I used a flexible sealant. I figured that perhaps the reason these lenses become detached is due to expansion/contraction causing the stiff factory glue to fracture.
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