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Post by mrdurst on Nov 18, 2021 20:31:17 GMT
Is there anywhere on this forum or some other site that has notes with basic knowledge regarding MQB coding?
For example, what can and cannot be done. What Light Functions do in the channels. For example, are some of them operated by logic gates, priority one over the other, etc....
I'm aware coding is slightly different between each of the VWG makes and models, but I would guess there is some common logic?
I know there is a menu for DRL on Golf 7, however this menu does not exist in the app for Passat B8. I'm sure on my pre MQB car I could go in to long coding for Central Electrics?
Anyone who knows of any good knowledge sources, please help.
Thanks.
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Post by dv52 (Australia) on Nov 19, 2021 9:42:46 GMT
MQB is a build platform that's been around for nearly 10 years now - so it really does depend on which model type and build year you are talking about. If your Passat B8 was built after about mid 2016 (depending on country of sale), it likely won't have any long code string in the central electrics module. ALL of the software switches that were in previous hex09 modules were transferred to adaptation channels in these later models- which made an already large channel count in the central electrics module even more humongous (over 2,000 channels)
As for your question about lighting functions, the first MQB cars pioneered the introduction of Leuchte-programming - which has also developed further with newer models. For example, until the recent MQB37W chassis (Golf 8), a standard Leuchte-set consisted of 19 x related channels - but the current series of MQB cars have Leuchte-sets with 23 x adaptation channels. Here's a comparison table that I made comparing how the Leuchte-set structure has changed with Golf cars that were built with MQB platform:
So, no need for anything as primitive as logic gates -instead, the 35 x exterior lights on MQB platform cars use a low level programming language which has its own simple rule about how to resolve conflicts (priority sequence). The language isn't difficult to learn, but don't expect a sophisticated capability from the instruction-set!!
Don
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Post by mrdurst on Nov 19, 2021 15:54:43 GMT
Thanks for your reply Don. That's a great help. I am looking at playing around with some of the coding. I am just trying to see if there is any damage likely to be done and/or something that's irreversible.
I am still trying to figure out the brightness settings, as incandescent bulbs appear to be at 100 and LED bulbs at either 100 or 127. Looking at some coding for some other equipment, they appeared to use similar for that. But 127 was used exclusively for LED, but I couldn't understand how you would control brightness outside of that setting.
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Post by dv52 (Australia) on Nov 19, 2021 20:29:45 GMT
mrdurst : You won't find any official information from VAG in the public domain about Leuchte-programming - but my guess (emphasis "guess") is that the central electrics module on MQB platform cars has 2 x modes of PWM control for lamp dimming; analogue for incandescent lamps and 7-Bit digital control for most LEDs. Hence the Dimmwert range 0-100 for incandescent and 0-127 (which equals 7F in hexadecimal, or Binary 111 1111) for most LEDs
Don
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