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Post by dannyrs3 on Apr 1, 2021 15:27:09 GMT
Could anyone (DV52  ) tell me what the difference between Leuchte2/3 and Leuchte4/5 is? The car is a 2014 A3 with Xenon projector headlamps. I'm looking to dim the coming home/leaving home LED "eyebrows" (DRL's) and they appear to be listed in both sets so I'm not sure which to change? |
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Post by dv52 (Australia) on Apr 1, 2021 21:06:32 GMT
Danny: So- it works like this:
- Leuchte4TFL LB4 and Leuchte5 TFL RB32 are the Leuchte-sets that tell the hex09 module how to set-up the power supply for the LED strings
- Leuchte2SL VLB10 and Leuchte3SL VRB21 are the "signal" Leuchte-sets that tell the hex09 module how to use the LED strings
To dim the illumination of the LED strings for the CH/LH function, don't alter anything on Leuchte-set 3 & 4 - change the appropriate Dimmwert channel on Leuchte-set 4 & 5
Don
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Post by dannyrs3 on Apr 1, 2021 22:21:17 GMT
OK, that makes sense now. Thanks again Don |
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Post by dannyrs3 on Apr 2, 2021 1:00:10 GMT
The one thing I’m not clear on is why CH/LH is in Leuchte 2/3 with dimmwert value of 30? As far as I can tell they are always on full (100) when they are active. The dimmwert value in leuchte 4/5 is 100 and reducing that works as expected.
I guess the don’t fully get what leuchte 2/3 is for...
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Post by dv52 (Australia) on Apr 2, 2021 20:01:16 GMT
danny: I'm not sure that I can explain it another way. I didn't want to get too technical but: - the dimmwert value on Leuchte 2/3 sets-up the power supply for CH/LH with a Pulse Width Modulation of 30 % (meaning that the ON-time for the CH/LH function is 30% and the OFF-time is 70%).
- the dimmwert value on Leuchte 4/5 tells the BCM to use 100% of the power-supply setting
I guess that you could reduce the dimmwert value on Leuchte 2/3 (and leave Leuchte 4/5 =100), but you get less granularity
Don
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Post by dannyrs3 on Apr 3, 2021 0:34:45 GMT
Ok that helps my understanding, thanks. It does beg the question what if both sets were set to 100? As 2/3 are supply signal I assume this might be a bad idea to over power the LEDs?
Is there ever a case where 2/3 should be altered for brightness or should it always be done in 4/5 as a rule?
Last question: where is the intensity of the parking light led brightness? In 4/5 they are set to 100 but in 2/3 they are set to 30. In action they are dimmer than the DRL and CH/LH which are also set to the same.
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Post by dv52 (Australia) on Apr 3, 2021 20:11:45 GMT
danny: I'm not sure if I've said before, but ALL my answers are guesses - there's nothing in the public domain that's official from VW about Leuchte-programming. This stuff is proprietary IP by the car manufacturer and whatever you find on the web is information the folk have observed/guessed from their experiments and their knowledge of electrical theory. In truth, I'm exactly in the same situation! It does beg the question what if both sets were set to 100? As 2/3 are supply signal I assume this might be a bad idea to over power the LEDs? hmm........ Not really!! There is nothing particularly wrong with setting the dimmwert value to maximum in both the power supply and the signal Leuchte-set pairs.
If you look at the channels for the Tagfahrlicht command (which is the DRL function), you should find that the Dimmwert value for power-supply Leuchte-sets is 127 and the corresponding value in the signal Leuchte-set is 100
Is there ever a case where 2/3 should be altered for brightness or should it always be done in 4/5 as a rule? I don't believe that there is only one way to do this - why not experiment and see for yourself? Last question: where is the intensity of the parking light led brightness? In 4/5 they are set to 100 but in 2/3 they are set to 30. In action they are dimmer than the DRL and CH/LH which are also set to the same. Yes, as I've said in a number of places before, the problem with using the DRL lamps/LED-strips for ANY night-time function is that the fittings don't have cut-off characteristics. This means that the lamps easily blind on-coming traffic. So the the illumination level for the Parking Light function must be set to a low level - as you have observed. |
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Post by dannyrs3 on Apr 5, 2021 19:52:41 GMT
Guesses? You mate I'm pretty sure are the international authority on Leuchte channels from what I can tell . I had a good fiddle with 2/3 and 4/5 and it is curious why they split them up the way they did, but once I got my head round it it was pretty easy to dial it exactly as I wanted it. My DRL CH lights now match my new 6000k foglights as best they can, and it looks sharp. One last question then Don - Dimmwert settings over 100 (ie. 127)- must it be an LED bulb for this to work? Should standard bulbs be no higher than 100? Once again, thanks for everything! |
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Post by dv52 (Australia) on Apr 5, 2021 20:26:43 GMT
danny: as you say -the central electrics module can separately operate incandescent and LED lamps. For incandescent lamps, the maximum setting is 100 and if the Leuchte-set is set-up for LED, the maximum value is generally (but not always) 127. If you exceed the correct value an error is generated - no harm is done to the lamp
Don
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Post by dannyrs3 on Apr 6, 2021 20:26:44 GMT
Cheers Don. It's been really interesting learning about the Leuchte channels.
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Post by gtd1501 on Jan 15, 2022 19:26:32 GMT
hi!
need help with my auto lights!
I install auto light switcher to halogen front light, all work perfect ch/lh,my problem is when switch on AUTO on day time work h7 instead h15 DRL.
how to change this on 09 central electrik. audi a3 2014 year
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Post by dv52 (Australia) on Jan 15, 2022 20:48:58 GMT
gtd1501 : Try this (note: the pictures below are from a previous version of OBD11- but it's the same on the current SW version):
Go to central electrics module - select Adaptation - search for Daytime running lights - select Fahrlicht bei Tag - then use the last screen below to select Normal DRLs
Don
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Post by gtd1501 on Jan 16, 2022 11:19:30 GMT
Tnx dev,
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) tell me what the difference between Leuchte2/3 and Leuchte4/5 is?
