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Post by nelly86 on Mar 8, 2023 11:23:07 GMT
My car is an Audi A3 e-tron 2017 I would like to know if: 1. via OBDeleven it is possible to switch off the upper LED of the headlight (the one that switches off when the arrows are activated, changing color to orange) and leave the lower angular part on (I see that there are 2 different LED strips). 2. I would also like to change the brightness level of the leds when the low beams are on. That I think is possible because I saw a video on youtube. In addition, if point 1 were possible, being able to choose that the light selector in position 0 has the configuration required in point 1, while in the sidelight selection it turns on in the normal way (even with the upper LED). This is my idea, I took the second photo while I had the arrows active when they were off, but I don't know if it's possible. Could anyone help me? Thank you NeLLy
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Post by dv52 (Australia) on Mar 8, 2023 20:17:55 GMT
nelly86 Look at the SCAN -does this car have Light Control Modules (LCMs) like this: - 39 Light Control Right
- 29 Light Control Left
If so, it's not possible (with OBD11) to make ANY changes to headlight lsmp operation
Don
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Post by nelly86 on Mar 15, 2023 22:08:57 GMT
hi, thanks for the info. I'll check as soon as I can. I think however that it will not be possible to do what I had in mind. I wanted to ask instead if it was possible and if someone knew how to prevent the horizontal LEDs at the bottom from lowering in brightness when I activate the low beams. the LEDs below are very low in brightness. it is difficult to find some information because I believe that only the A3 etron version 2017 has those LEDs. can you get anything back? I'll try again if anyone has any ideas. Thank you
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Post by dv52 (Australia) on Mar 16, 2023 22:05:01 GMT
nelly86 : It really doesn't matter if the car is an "MY17 A3 etron", or not - as I said, it ALL depends on LCMs!! This restriction applies to ALL MQB platform cars (like the newer model Audi A3s)! The other point that I would make (with absolutely no offense intended) is that there us a very good reason why the "LEDs below" are dimmed when the low-beam lights are illuminated as a factory condition. This is because the "LEDs below" don't have reflectors with cut-off characteristics. Therefore and unlike the reflectors in the low-beam lights (which DO have cut-off characteristics), full illumination of the "LEDs below" during night-time would blind on-coming drivers. So, it's safety condition for sale of these vehicles to dim these LEDs when the low-beam lights are switched-on. Maybe this explains in part why LCMs can't be accessed by third-party diagnostic devices like OBD11 - I'm guessing, of course!! Don
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