Vexed: Indeed you are correct -in fact, the BCM on your car has a massive 1,834 x adaptation channels (about 40% of the total number of adaptation channels in the car - depending on how many modules you have). So, trying to unravel the hidden secrets of this control module is indeed a kind-of Gordian knot!
But, let me invite you to consider a possible way forward through this maze - and I'm guessing about this because my BCM is the older type.
First, let's look at the software switches on the older BCMs - the instructions in your link refer to Byte 2 and specifically, Bit0 & Bit1. Here's the screen-shot of Byte 2 on my older BCM (I've expanded the drop-down options for Bit 0-2 to show the allowable settings):
For anyone that hasn't seen this type of screen before - this is an example of the new "yellow" long coding helper screens that can be invoked by the latest Ross-Tech software (bloody terrific!).
The acronym that is used by VW for high beam assist is
FLA - probably means something evocative in German (incidentally, AFS is the front-lighting-system which controls the static cornering function in the headlights).
So, your link talks about setting Bit0=1 and Bit1=1 which is binary 0011 and in hexadecimal speak this is equal to hex03.
If you examine the drop-down options in my picture,
03 lines-up with an FLA facility, hence this change looks correct.
So-far, so-good, but here is the "extrapolation" bit that is sheer hypothesis on my part: the identifiers in the drop-down box commonly refer to "Erweiterte Fernlichtsteuerung", which Mr Google translates to
Extended high beam control.
I have in my database of MQB platform vehicles an adaptation channel map of a BCM from a MY17 Aussie Tiguan (courtesy of a VWW forum colleague) which has a zero-sequence code-string (like yours). When I search through that admap, I find the following intriguing channel:
ENG10578-ENG10901-Fernlicht_assistent-Erweiterte_Fernlichtsteuerung.
This channel is intriguing (to me, at least) because the latter part of the descriptor (this is called the "Child" name) is identical to the common name in the drop-down list in my screenshot above. But, the channel is even more intriguing because on the admap in my database, the setting for this channel is
AFS: Fernlicht ueber AFS! - which is exactly the wording on the drop-down options in my screen-shot for hex
04 setting (remember, this admap is from a R-line Tiggy)!
Now, as you will know, admaps only report the setting that's used for a particular adaptation channel - admaps do not report the other, un-used, allowable settings. But IMO, there is sufficient evidence in the logic that I have explained above to strongly suggest that this indeed the equivalent channel for the software switches for Byte 2, Bit0-2 in the older style BCMs (I think)
So, as I said previously - my hypothesis is just that, it's an untested guess. But you could have a look at the other allowable options for this channel in your BCM to ascertain if they appear to offer the same options as in my screen-shot. If this happens, then you have further verification of my hypothesis.
If your findings are positive, you might then consider whether you want to try changing the setting for this channel to the
03 setting in the pull-down option in my screenshot (i.e.
AFS: FLA: BCM-Fernlicht). But you should proceed on the understaning that this is an untested suggestion- alas, you will probably be the first to attempt this tweak should you decide to proceed!
Don
Reply With Quote
Originally Posted by zei20t
high beam assist didn't work on my car. I got a failure each time I attempted to operate it
Bookmarks