|
|
Post by vins0101 on Apr 28, 2023 13:32:00 GMT
Hi guys, I noticed that in the Auto position the front lights come on when there is still light, I would like them to come on when it gets darker, what is the parameter to change? Thank you
|
|
falcon
Junior Member
Posts: 57
|
Post by falcon on Apr 28, 2023 17:31:57 GMT
In the MIB under "car" - "Settings" - "Light" there are variants to choose from: "early-normal-late".
I read something about it in the coding / adjustments, probably in Stg 9, but I can't remember where.
|
|
|
|
Post by vins0101 on Apr 28, 2023 18:02:19 GMT
Thanks for your replay,
I've already tried to change the settings on the MIB, but I haven't found any differences in the three options.
|
|
|
|
Post by MartiniB on Apr 29, 2023 4:44:18 GMT
on my previous Škoda Suoerb Mk3 2016 i made like this -> forum.obdeleven.com/thread/7494/drls-longer-xenons-activatedon current Škoda Suoerb Mk3.FL 2023 i changed these, seems they're work -> Change Light threshold09 Central Electrics Access Code 31347 Adaptation -> Light sensor ---> Helligkeitsgrenze_Licht_ausschalten: Orig value: 2200 lx New value: 1200 lx ---> Daemmerungsgrenze_Hysterese_untergrenze: Orig value: 2200 lx New value: 1200 lx ---> Helligkeitsgrenze_Licht__einschalten: Orig value: 1200 lx New value: 800 lx ---> Daemmerungsgrenze, Hysterese_obergrenze: Orig value: 1200 lx New value: 800 lx |
|
|
|
Post by dv52 (Australia) on Apr 29, 2023 22:44:21 GMT
MartiniB : hmmm............ I propose a slight modification to the numbers in your suggestion (maybe)? The operation of the light-sensor on a mk7 uses a "closed-loop" controller because the light transducer feeds directly into the output switching mechanism. As is clear from the channel descriptors in your post, this particular control system relies on a Hysteresis design. Hysteresis is an engineering principle that stops a control system from "hunting". Hunting is the process in a control system that stops the output from continuously oscillating ON/OFF - which would result as the environment hovers around a control system that uses a single trigger-point. As an example of hunting - assume that the light-sensor has a single trigger-point: the car's headlights will continuously switch ON/OFF as the vehicle travels through areas that vary slightly from the trigger-point. Hysteresis stops this from happening because it uses 2 x trigger points. Here's how the light-sensor works on a mk7 that is fitted with an OEM light-sensor with factory settings. To explain my chart: I've shown the day-light level as a sinusoidal curve, which clearly it isn't - but it's OK for the purpose in my chart. Light measurement is in Lux and the 2 x trigger-points for the Hysteresis process are as shown.
If you follow the first part of the curve in my chart, the light-level increases over the early part of a day, it peaks and then it starts to decrease as "Dusk" approaches. At the point where the ambient light-level falls to 2,200 lx, the light-sensor switches-ON the car's headlights. If the car was traveling over-night, the headlights would remain switched-ON until the ambient light-level increased to 1,200 lx - being "Dawn" the next morning.
If you have understood my words, hopefully it's clear how the 2 x trigger-points operate to stop hunting. Hopefully it's also obvious that the area shaded as "Hysteresis Zone" in my chart is shared by both the upper and lower trigger-points depending on whether light-levels are increasing, or reducing (this is called the curve's "first-derivative" in maths)
So, with my explanation as context, I suggest that any changes to the factory settings for the light-sensor should retain the size of the hysteresis as factory set - which is 1,000 lx. This ensures that the anti-hunting mechanism in the closed-loop control system is as per the factory design
Don
|
|
|
|
Post by MartiniB on May 2, 2023 7:06:25 GMT
dv52 (Australia) i didn't say that is only way, just "seems it's working" suggest please one better method @inacho tell me some reason why burn main beam at these condition when car has been equipped by DRL 14:39 
|
|
|
|
Post by MartiniB on May 2, 2023 15:34:33 GMT
@inacho
values 2200/1200 don't look as calibrated, especially when all cars have the same
for my understanding calibrated must mean, fine tuned by particular sensor
Your mentioned Settings in the Car menu can't solve "low beam during bright day" problem
|
|
|
|
Post by vins0101 on May 2, 2023 19:04:32 GMT
We understand that you don't want to change the factory settings, you will have your correct reasons. But I think that everyone is free to modify the factory settings, as always "at their own risk". My question is how to do it, I didn't ask for an opinion. I fully agree with what MartiniB said, whom I thank, for the information provided. And thanks for the "enlightening" contributions of dv52 (Australia) . Having said that I will try to change the lux values to find what I think is best suited to my needs. |
|
|
|
Post by dv52 (Australia) on May 3, 2023 1:30:45 GMT
dv52 (Australia) i didn't say that is only way, just "seems it's working" suggest please one better method MartiniB : I'm not sure, but I might owe you an apology - for the unclear message in my response. I most definitely wasn't inferring that this method was "the only way".
For absolute clarity: I was suggesting that if this method is used - consideration should be given to retaining the size of the hysteresis as originally designed.
Whilst I'm fairly certain about my explanation of Hysteresis (it's a well established engineering principle), I'm not sure about how the detailed design of various control system parameters for the light-sensor function are applied for the mk7. I note that the first version hex09 module for the mk7 didn't bring out the adaptation channels with the Parent name Assist light functions. It was only after about mid 2016 (with hex09 modules that contained the revised adaptation database) that these channels appeared.
My hunch (wild guess really) is that it was beneficial to do this because VW's "world" car had to be compliant with quite varying Dusk/Dawn conditions on various parts of this beautiful blue planet. As an example - I can remember many years ago a fundamental discussion regarding how to define Dawn and Dusk. We all bandy-about these terms as if there is a common understanding - but when it comes to applying an actual number to the words - folk have different ideas.
It seems that VW has settled on Dusk=2,200 lx and Dawn=1,200 lx - but in my day, the nominal values were Dusk=2,000 lx and Dawn=1,000 lx. Again my hunch is that VW's approach of adding ~10% to my nominal numbers may have been a conservative "safety decision" (but I don't know this with certainty)?
Don't get me wrong, I'm not saying that VW's numbers are incorrect- they are just different (but the hysteresis size is the same in both VW's and my definition). And more importantly, they are just a single pair of numbers that could apply to the entire planet - which is a big ask IMHO!
So, again - my uninformed guess is that there was a purpose to the decision of the good Burghers @ VW to add the Assist light functions group to the hex09 database.
Clearly though - said good Burghers never contemplated the antics of well intentioned (but ill-informed) tinkerers like us!! 
Don
|
|
|
|
Post by MartiniB on May 3, 2023 7:02:39 GMT
dv52 (Australia) THANKS for Your extended answers! my hunch is that VW's approach of adding ~10% to my nominal numbers may have been a conservative "safety decision" agree, "safety" on paper, similar as with Ice Warning at 4°c(i did change to 2) hysteresis requires some gap, that's clear, but i can't see any crime when it's decreased to 400 from default 1000 coded 800/1200 one month ago, have no claim during that short period of test p.s. last sentence in previous post isn't for my limited English 
|
|
|
|
Post by dv52 (Australia) on May 3, 2023 23:48:34 GMT
p.s. last sentence in previous post isn't for my limited English OK, your English language skills were so good in all your previous post, I assumed that English was your first language!!
Clearly though - said good Burghers never contemplated the antics of well intentioned (but ill-informed) tinkerers like us!! My sentence was written as satire (i.e. meant to be funny - but in a silly, or not proper manner!).
Without the confusion of sarcasm, my point is that when the good Burghers in Germany made their determination to define Dawn/Dusk in the VW way, they would have assumed that changes to these values would ONLY be made as an official VW decision (as you will be aware - VAG is a very big believer in standard operating systems for ALL cars that are leave their production line).
Or said another way - VAG's choice to bring-out the Dusk/Dawn values as adaptation channel values that could be altered simply through the normal hex09 module access code would have been made in total ignorance of the ability of "tinkerers like us" to use third-party tools like OBD11 to make these changes.
So, whatever protection mechanisms that VW design engineers embedded into the change process for these numbers has been totally voided by OBD11, VCDS, VCP..........etc.
Don
|
|
|
|
Post by scientificharmony on Sept 25, 2023 7:58:35 GMT
MartiniB : hmmm............ I propose a slight modification to the numbers in your suggestion (maybe)? The operation of the light-sensor on a mk7 uses a "closed-loop" controller because the light transducer feeds directly into the output switching mechanism. As is clear from the channel descriptors in your post, this particular control system relies on a Hysteresis design. Hysteresis is an engineering principle that stops a control system from "hunting". Hunting is the process in a control system that stops the output from continuously oscillating ON/OFF - which would result as the environment hovers around a control system that uses a single trigger-point. As an example of hunting - assume that the light-sensor has a single trigger-point: the car's headlights will continuously switch ON/OFF as the vehicle travels through areas that vary slightly from the trigger-point. Hysteresis stops this from happening because it uses 2 x trigger points. Here's how the light-sensor works on a mk7 that is fitted with an OEM light-sensor with factory settings. To explain my chart: I've shown the day-light level as a sinusoidal curve, which clearly it isn't - but it's OK for the purpose in my chart. Light measurement is in Lux and the 2 x trigger-points for the Hysteresis process are as shown.
If you follow the first part of the curve in my chart, the light-level increases over the early part of a day, it peaks and then it starts to decrease as "Dusk" approaches. At the point where the ambient light-level falls to 2,200 lx, the light-sensor switches-ON the car's headlights. If the car was traveling over-night, the headlights would remain switched-ON until the ambient light-level increased to 1,200 lx - being "Dawn" the next morning.
If you have understood my words, hopefully it's clear how the 2 x trigger-points operate to stop hunting. Hopefully it's also obvious that the area shaded as "Hysteresis Zone" in my chart is shared by both the upper and lower trigger-points depending on whether light-levels are increasing, or reducing (this is called the curve's "first-derivative" in maths)
So, with my explanation as context, I suggest that any changes to the factory settings for the light-sensor should retain the size of the hysteresis as factory set - which is 1,000 lx. This ensures that the anti-hunting mechanism in the closed-loop control system is as per the factory design
Don
Hey Mate Can you tell me where i can find these parameters on obdeleven for my mk7 Golf R? I would also like to adjust the sensor so that the headlamps turn on when it is actually getting dark. Any assistance is appreciated Chris |
|
|
|
Post by dv52 (Australia) on Sept 25, 2023 12:39:44 GMT
So, here's the thing about the explanation in my post - whether the actual trigger points in the hysteresis can be accessed depends entirely on the version central electrics module that's installed in the car.
From the cars in my MQB platform database, it seems that the trigger points were only brought-out as adaptation channels in later version modules. My hunch is that for earlier central electrics modules that had an active long-code string - the hysteresis trigger points were locked away in module firmware (i.e. module dataset). However, for mk7s that were built after around mid 2016 (depending on country of sale) - the central electrics modules lost their long-code strings and the adaptation channel database was extended. These later hex09 modules have a bunch of new adaptation channels as follows:
Light sensor
Daemmerungsgrenze: Hysterese_obergrenze (twilight limit: Hysteresis_upper limit) > 1200 lx
Daemmerungsgrenze_Hysterese_untergrenze (Dusk limit_Hysteresis_lower limit) > 2200 lx
ECE_Lichteinschaltschwelle (ECE_Light switch-on threshold) > 1000 lx
Einschaltgrenze_CHO_LHO (switch-on limit_CHO_LHO) > 600 lx
Helligkeitsgrenze_Licht__einschalten (brightness limit_light__switch on) > 1200 lx
Helligkeitsgrenze_Licht_ausschalten (brightness_limit_light_off) > 2200 lx
Helligkeitsgrenze_Licht_ausschalten_red (brightness limit_light_switch_off_red) > 00 50
Helligkeitsgrenze_sehr_hell (brightness_limit_very_bright) > 4000 lx
HMI_Exterior_light_on_highway (HMI_Exterior_light_on_highway) > not active
HMI_Exterior_light_on_rain (HMI_Exterior_light_on_rain) > not active
HMI_exterior_light_sensitivity (HMI_exterior_light_sensitivity) > frueh
HMI_Wiper_Comfort_Rain_Sensor_OFF (HMI_Wiper_Comfort_Rain_Sensor_OFF) > not active
LS_Error_Ausgabe (LS_Error_Output) > not active
Maximale_Ausgangsspannung (Maximum_output_voltage) > 4500 mV
Maximale_Beleuchtungsstaerke (Maximum illumination intensity) > 6000 lx
Minimale_Ausgangsspannung (Minimum_output_voltage) > 2000 mV
Minimale_Beleuchtungsstaerke (Minimal_illuminance) > 0 lx
Tunnel_einschalt_verzoegerung (tunnel_on_delay) > 2
Note: the values shown in the list above are the default factory settings
This said, the actual OEM light sensor that's fitted to the windscreen is a LIN device (OBD11 calls this a Subsystem) and it has its-own long-code string which usually includes a set of software switches related to the trigger values. However, the facility on the light-sensor is more of an "offset" - rather than allowing changes to the upper/lower hysteresis points. Plus, the facility on the light sensor ONLY allows earlier switching - see below (the screenshot is taken from VCDS, but the Byte/Bit values are the same for OBD11) Don |
|
|
|
Post by scientificharmony on Sept 25, 2023 14:41:21 GMT
Hey mate,
Thanks for the reply.
My R is 2015 and doesnt seem to have that adaptation ☹️
I take it we cant change it on my car?
|
|
|
|
Post by dv52 (Australia) on Sept 25, 2023 20:20:11 GMT
yes!
|
|
|
|
Post by scientificharmony on Dec 11, 2023 8:52:49 GMT
Hey mate
I have recently upgraded my mk7 R to a 7.5 R (2019) as I wanted to move to a DSG.
Was hoping you could help me configure my auto lights using what you mentioned earlier in this post?
I would like the lights to stay off longer. Here in Ireland, it gets very dull and overcast which would make the dipped bean switch on too often.
Any assistance would be appreciated!
Thanks !
Chris
|
|
|
|
Post by dv52 (Australia) on Dec 11, 2023 23:55:43 GMT
Chris:Hi I'm not sure - it's easier to make the auto lights switch earlier using the long-code entries in my VCDS screenshot above. Maybe try changing the channel below - which I have copied from my previous post:
- Helligkeitsgrenze_Licht__einschalten (brightness limit_light__switch on) > 1200 lx
- Helligkeitsgrenze_Licht_ausschalten (brightness_limit_light_off) > 2200 lx
As I have said in this thread - in changing these values, I suggest that you keep the hysteresis differential the same as factory set. Meaning that the factory hysteresis differential is: - 2200 lx minus 1200 lx =
100 lx 1000 lx.
So, if you decide to increase channel 1 value by 100 lx - also increase channel 2 value by the same amount
Don |
|
falcon
Junior Member
Posts: 57
|
Post by falcon on Dec 12, 2023 16:47:59 GMT
Hello Don,
Without wanting to lecture, I think you made a mistake. 2200-1200 is 1000. So it must be called 1000 lx difference.
Greetings
|
|
|
|
Post by scientificharmony on Dec 14, 2023 8:45:50 GMT
I have tried the following settings and have yet to notice a difference: 1. Helligkeitsgrenze_Licht__einschalten (brightness limit_light__switch on) > 400 lx 2. Helligkeitsgrenze_Licht_ausschalten (brightness_limit_light_off) > 1400 lx 3. Daemmerungsgrenze Hysterese obergrenze (Daemmer limit hysteresis Upper limit] 400 lx 4. Daemmerungsgrenze Hysterese untergrenze (Dimming limit hysteresis lower limit) 1400 lx Do these look correct? I am unsure. Basically, in thought the 400 would ensure the following:
lights will come on when dropped below 1400
lights turn off when lux rises above 400
Additionally, there is a setting Helligkeitsgrenze sehr Hell - 2000 lx (not sure what this is for?) (Brightness limit very bright) |
|
|
|
Post by dv52 (Australia) on Dec 14, 2023 22:13:19 GMT
I have tried the following settings and have yet to notice a difference: 1. Helligkeitsgrenze_Licht__einschalten (brightness limit_light__switch on) > 400 lx 2. Helligkeitsgrenze_Licht_ausschalten (brightness_limit_light_off) > 1400 lx 3. Daemmerungsgrenze Hysterese obergrenze (Daemmer limit hysteresis Upper limit] 400 lx 4. Daemmerungsgrenze Hysterese untergrenze (Dimming limit hysteresis lower limit) 1400 lx Do these look correct? I am unsure. Chris: Yeah - me too (unsure)!! However, I can understand the logic in your choice of numbers. Probably OK as an initial test - I reckon!! Basically, in thought the 400 would ensure the following: lights will come on when dropped below 1400
lights turn off when lux rises above 400 Hmm......... maybe this: My hunch |
|
|
|
Post by scientificharmony on Dec 15, 2023 11:22:08 GMT
I have tried the following settings and have yet to notice a difference: 1. Helligkeitsgrenze_Licht__einschalten (brightness limit_light__switch on) > 400 lx 2. Helligkeitsgrenze_Licht_ausschalten (brightness_limit_light_off) > 1400 lx 3. Daemmerungsgrenze Hysterese obergrenze (Daemmer limit hysteresis Upper limit] 400 lx 4. Daemmerungsgrenze Hysterese untergrenze (Dimming limit hysteresis lower limit) 1400 lx Do these look correct? I am unsure. Chris: Yeah - me too (unsure)!! However, I can understand the logic in your choice of numbers. Probably OK as an initial test - I reckon!! Basically, in thought the 400 would ensure the following: lights will come on when dropped below 1400
lights turn off when lux rises above 400 Hmm......... maybe this: My hunch
I tested this morning after applying the settings at 400 and 1400. The light still seems to be on at 8:51 and there is plenty of day light in my opinion.
Now, what I am thinking is, there must be some sort of run in period, or reconfiguration time that the lights need to adjust to the new parameters?
When I sat in direct sunlight earlier on default 2200/1200 settings, the lights powered off. As soon as I drove into my street which was not under direct sunlight, the lights powered on. So the default trigger works.
What I am being led to believe is, I need to enter the new values of 1400/400, sit in direct sunlight for the lights to go off and then hopefully they will not power on until the lux level drops below 400. Some sort of re-calibration phase maybe?
|
|
|
|
Post by stefangricko on Feb 16, 2024 8:13:35 GMT
Hi everyone! I've read this thread from top to bottom quite a few times. Also, been trying to do some experiments regarding sensor sensitivity but unfortunately with no luck. Here's the thing: before I used method that scientificharmony suggested, I spent quite some time, experimenting on my own still. Tried all kind of craziness with those lx parameters, maintaining and also not, that "factory" hysteresis of 1000lx of difference that's supposed to be there. Tried it that much extreme to try to fool it and see what happens if I make the car to switch on lights only when it's complete dark (as low as 100lx for minimum parameter) but that also didn't work. Then used previous mentioned member's method and thinking who am I to be smarter than some other folks around here, let's just try someone else's method. Did that and also nothing changed It just happens to work mainly as the car means is ok to do and no matter what I do with those parameters, car just won't listen to me :/ Having said all this, I'm led to believe that maybe those parameters are just part of the cake for changing sensitivity in this module and there should be some other parameters to change, maybe in general like when it's dusk and dawn... I want to share this with you guys also: when it's direct sun and I try to fool the sensor that it's night, I cover it with my palm, lights go on, as soon as 2-3 seconds after I uncover sensor, lights go off. But when I'm in "risky" shades of more dark environment (like my driveway) when I pull in, lights don't engage for few minutes (oh I think I'm fine now) then I also try to fool it by covering sensor with my palm, lights go on, and guess what, when I uncover the sensor, lights just stay on - no matter what I do. Turn off the auto lights, turn the ignition off, drive a little bit forward and backward they're still on! And then, when I go to regular drive, after driving for some 20ish seconds in direct sun/very bright environment, is the moment when lights finally go off. Oh yeah, I almost forgot. First settings in this section "Light sensor" into Adaptation channel-Central Electrics module is "Einschaltergrenze CHO LHO". As I learned through my journey of adaptations, this is regarding CH/LH sensitivity or should I say under which illuminance they should be triggered. Got quite frustrated regarding this also because they trigger quite early - sometimes when I pull in my driveway and it's kind of shady, auto lights don't engage but CH triggers itself when I tend to leave the car... Have tried it also as low as 100lx but nothing changed. Just to clarify this behavior - after CH engages and when I try to start the car again in this environment, lights are on. I don't want to be misunderstood that there may be some kind of malfunction, after CH engaged, lights regularly go on... Having in mind all of the things said here, what I would like to do with my lights and CH/LH is that, when there is pure "daily" environment, or should I say plenty of daytime left, no matter if I am in the shadow or direct daylight, I'd like to "discover" that kind of settings that would give me the satisfaction of having this systems present on my car (auto lights, CH/LH), and right now, every time this odd behavior happens to me, I got very frustrated and also in this moments I feel like I was more satisfied with manual lights before I retrofitted all this equipment As I discovered all over the internet, VW has quite a problems regarding this matter, unlike Audis, they work quite OK  My lease just got finished and my terms were that I keep the car after lease got finished and afterwards I plan to sell my car, but won't be changing the car for minimum year or so - having that in mind, I really would like to make it for me to be most pleasant experience for the remaining time. Next brand surely would be an Audi |
|
|
|
Post by scientificharmony on Oct 10, 2024 17:35:27 GMT
Hi everyone! I've read this thread from top to bottom quite a few times. Also, been trying to do some experiments regarding sensor sensitivity but unfortunately with no luck. Here's the thing: before I used method that scientificharmony suggested, I spent quite some time, experimenting on my own still. Tried all kind of craziness with those lx parameters, maintaining and also not, that "factory" hysteresis of 1000lx of difference that's supposed to be there. Tried it that much extreme to try to fool it and see what happens if I make the car to switch on lights only when it's complete dark (as low as 100lx for minimum parameter) but that also didn't work. Then used previous mentioned member's method and thinking who am I to be smarter than some other folks around here, let's just try someone else's method. Did that and also nothing changed It just happens to work mainly as the car means is ok to do and no matter what I do with those parameters, car just won't listen to me :/ Having said all this, I'm led to believe that maybe those parameters are just part of the cake for changing sensitivity in this module and there should be some other parameters to change, maybe in general like when it's dusk and dawn... I want to share this with you guys also: when it's direct sun and I try to fool the sensor that it's night, I cover it with my palm, lights go on, as soon as 2-3 seconds after I uncover sensor, lights go off. But when I'm in "risky" shades of more dark environment (like my driveway) when I pull in, lights don't engage for few minutes (oh I think I'm fine now) then I also try to fool it by covering sensor with my palm, lights go on, and guess what, when I uncover the sensor, lights just stay on - no matter what I do. Turn off the auto lights, turn the ignition off, drive a little bit forward and backward they're still on! And then, when I go to regular drive, after driving for some 20ish seconds in direct sun/very bright environment, is the moment when lights finally go off. Oh yeah, I almost forgot. First settings in this section "Light sensor" into Adaptation channel-Central Electrics module is "Einschaltergrenze CHO LHO". As I learned through my journey of adaptations, this is regarding CH/LH sensitivity or should I say under which illuminance they should be triggered. Got quite frustrated regarding this also because they trigger quite early - sometimes when I pull in my driveway and it's kind of shady, auto lights don't engage but CH triggers itself when I tend to leave the car... Have tried it also as low as 100lx but nothing changed. Just to clarify this behavior - after CH engages and when I try to start the car again in this environment, lights are on. I don't want to be misunderstood that there may be some kind of malfunction, after CH engaged, lights regularly go on... Having in mind all of the things said here, what I would like to do with my lights and CH/LH is that, when there is pure "daily" environment, or should I say plenty of daytime left, no matter if I am in the shadow or direct daylight, I'd like to "discover" that kind of settings that would give me the satisfaction of having this systems present on my car (auto lights, CH/LH), and right now, every time this odd behavior happens to me, I got very frustrated and also in this moments I feel like I was more satisfied with manual lights before I retrofitted all this equipment As I discovered all over the internet, VW has quite a problems regarding this matter, unlike Audis, they work quite OK My lease just got finished and my terms were that I keep the car after lease got finished and afterwards I plan to sell my car, but won't be changing the car for minimum year or so - having that in mind, I really would like to make it for me to be most pleasant experience for the remaining time. Next brand surely would be an Audi The Saga continues... I have tried all sorts of parameters and have yet to have any success. The lights are definitely controlled by the parameters in the Light Sensor section but knowing which are correct is the trick. I would have liked my lights to come on when the daylight reaches around 600lx and then turn on at 400lx, but that would mean only a 200lx hysteresis zone. There has to be some genius on here that knows how to configure this? Im not sure if dv52 (Australia) doesnt know or if he just gave up, but I am very sure if anyone was to figure this out.. it would be him! Thanks Chris |
|
|
|
Post by dv52 (Australia) on Oct 10, 2024 21:18:28 GMT
Chris: Alas I have nothing more to add to this vexed matter - save to say that ALL (capital letters for emphasis) my mental meanderings in this thread are guesses, so it's entirely possible that at least some of my words are incorrect!! I can't find anything official from the deities on the VW mother-ship about this matter - so ALL those contributing to this thread are totally in the land of conjecture! I would make a couple of further comments though. In respect of stefangricko experimental method using a hand to cover/uncover the light sensor might NOT be ideal because the operation of the light sensor is conditional on the restrictions designed into the car entering/leaving a tunnel. These restrictions impose a delay into the light-sensor behavior!
Also, in addition to the role of the central electrics module in controlling the headlight function - the Light sensor, itself has its own smarts that effects the operation of auto ON/OFF activity. This is shown in the VCDS long-code helper screen for the light-sensor below;
Don
|
|
|
|
Post by scientificharmony on Oct 11, 2024 7:14:25 GMT
I am wondering how those parameters effect the light sensor parameters?
Unfortunately I do not own a vcds.
I am wondering what these 2 parameters do.
Helligkeitsgrenze_sehr_hell (brightness_limit_very_bright) > 4000 lx
ECE_Lichteinschaltschwelle (ECE_Light switch-on threshold) > 1000 lx
|
|
|
|
Post by scientificharmony on Oct 11, 2024 9:43:25 GMT
So, this morning I changed the light configuration to 200lx and 1200lx around 8am and there was plenty of light but the lights still did not turn off. After the school at 9, I got into the car and the lights did not turn on. I wonder has the time of day got anything to do with the configuration? Does the light sensor rely on some kind of time mechanism so it knows that the lights should be on or not?
I will continue to test with the above parameters and feed back any findings
|
|
|
|
Post by dv52 (Australia) on Oct 11, 2024 20:46:19 GMT
I am wondering how those parameters effect the light sensor parameters? Unfortunately I do not own a vcds. Chris, it doesn't matter if you "do not own VCDS". The functions in my VCDS screenshot are part of the Rain Light Sensor, they are not a VCDS thing.
In OBD11, the RLS is a Subsystem of the central electrics module and the long-code string for the RLS is accessible via the coding sequence below (it's similar for iOS version software):  I included the VCDS screenshot in my previous reply to show the Btye/Bit descriptors for the dusk switch-on thresholds.
The software switches in Byte 00, Bit 3-5 on the RLS alter the light-ON value that is set in the central electrics module to an "earlier" value. I do not believe that OBD11 shows these descriptors. I am wondering what these 2 parameters do. Helligkeitsgrenze_sehr_hell (brightness_limit_very_bright) > 4000 lx ECE_Lichteinschaltschwelle (ECE_Light switch-on threshold) > 1000 lx hmm.........as with everything else in this thread - I don't know with certainty! Your guess is as good as mine - but maybe it means: - Helligkeitsgrenze_sehr_hell = an upper limit in ambient light-level from the RLS measurement that suspends the operation of the calculation algorithm.
- ECE_Lichteinschaltschwelle = the application of the threshold setting based on the United Nations Economic Commission for Europe (UNECE) road rules I'm not sure how this varies from say, the National Highway Traffic Safety Administration (NHTSA) road rules in USA - but for example, the central electrics module channel static AFS light-Vorschrift allows the car to choose different world road rules to control the cornering-light function
Again, I'm guessing!!
|
|
My lease just got finished and my terms were that I keep the car after lease got finished and afterwards I plan to sell my car, but won't be changing the car for minimum year or so - having that in mind, I really would like to make it for me to be most pleasant experience for the remaining time. Next brand surely would be an Audi