All BMWs New Code: Adjust the Sensitivity of the Automatic Headlights

Many of you have complained that the Automatic Headlamp Control seems too sensitive. Many times my headlights are on as late as 9 or 10 AM, even when the sky is bright a clear.

You can adjust the sensitivity of the control by changing a few codes. This process can be a bit complex (there seems to be other controls in place) so I suggest the following changes:


JBBF->3530 RLS, 0C->RLS_DEF_FLC_SCHWELLWERT_SATZ-> unempfindlich (default is empfindlich)

JBBF->3530 RLS, 0C->RLS_FLC_SCHWELLWERT_SATZ unempfindlich (default is empfindlich)

Just this. Not not mess with the wertes.


After many tries, it seems that the default for "non-sensitive" (unempfindlich; werte=01) works for me (ignore the Japan/China comment in the setting). The default setting for North America (and perhaps other locations) is "sensitive" (empfindlich) or werte=07, which seems to fast in turning the lights, even in fairly bright conditions. The "normal" setting is still a bit too fast (in my opinion) turning the headlights on.

The settings range from (with the default werte value next to it): non-sensitive (01), normal (03), sensitive (07) and very sensitive (0B or 11 in decimal). The wertes range from 0 to 15 (0F). That said, adjusting the wertes is not a straight forward affair. For example 00 does not seem to make it less sensitive than 01 (at least in my hands).

The suggested setting works for me, but others can tested by you. Please report successful changes so we can all learn more about these settings.

Notes-

1) It seems this change sometimes is instantaneous but in other occasions it takes a bit of time to "set". Give it at least a day after the code change to assess its effect.

2) The sensor normally takes about a minute or two to respond to a change in brightness.

3) When you are indoors (a garage or a tunnel for example), the lights always come on regardless of brightness. This is controlled by another independent setting not affected by this change.

JEG23

Awesome find. Cool

I found these long ago, but changes make no change, no difference between each "werte".

awesome, i'll try these tonight

Originally Posted by tankren

I found these long ago, but changes make no change, no difference between each "werte".

tankren,

That is not the case. There is a dramatic difference between the default (sensitive) and non-sensitive (unempfindlich). The specific werte changes are complex as I mentioned. That is why I recommend just the changes above. Try it and you will see.

JEG23

Originally Posted by cn555ic

You are the new innovator of coding! Keep it going as your HOT!!!

cn555ic,

Thanks

JEG23

Originally Posted by JEG23

tankren,

That is not the case. There is a dramatic difference between the default (sensitive) and non-sensitive. The specific werte changes are complex as I mention. That is why I recommend just the changes above. Try it and you will see.

JEG23

my car was built in June,2012 , the default value was "very sensitive", I got my car an update in December and the value has been changed to "not sensitive", so I think the value was the "KEY", but I can't tell why it made no change before

canadian 01/2011 535ix

The default werte values I have are different and still finding them too sensitive:

JBBF->3530 RLS, 0C->RLS_DEF_FLC_SCHWELLWERT_SATZ-> empfindlich/werte=02

JBBF->3530 RLS, 0C->RLS_FLC_SCHWELLWERT_SATZ -> empfindlich/werte=02

Choices for both are:

normal/werte=01
empfindlich/werte=02
unempfindlich/werte=03
sehr_empfindlich/werte=04

I'll try unempfindlich/werte=03 and see how it goes before changing its werte to 01

Originally Posted by gicamuci

canadian 01/2011 535ix

The default werte values I have are different and still finding them too sensitive:

JBBF->3530 RLS, 0C->RLS_DEF_FLC_SCHWELLWERT_SATZ-> empfindlich/werte=02

JBBF->3530 RLS, 0C->RLS_FLC_SCHWELLWERT_SATZ -> empfindlich/werte=02

Choices for both are:

normal/werte=01
empfindlich/werte=02
unempfindlich/werte=03
sehr_empfindlich/werte=04

I'll try unempfindlich/werte=03 and see how it goes before changing its werte to 01

gicamuci,

As I mentioned, the werte values are complex. Just change from empfindlich to unempfindlich and do not mess with the werte values for now. That alone will have a dramatic impact on the sensitivity of the headlight control.

I have experimented with this for weeks. If you change in RLS_DEF_FLC_SCHWELLWERT_SATZ or RLS_FLC_SCHWELLWERT_SATZ the setting and also the werte, you defeat the setting. The wertes are defined by other settings below those.

I did not want to make this over complicated and confuse everybody. As I said just change:

JBBF->3530 RLS, 0C->RLS_DEF_FLC_SCHWELLWERT_SATZ-> unempfindlich (default is empfindlich)

JBBF->3530 RLS, 0C->RLS_FLC_SCHWELLWERT_SATZ unempfindlich (default is empfindlich)

and see if you are satisfied. I think you will.

JEG23

Originally Posted by tankren

my car was built in June,2012 , the default value was "very sensitive", I got my car an update in December and the value has been changed to "not sensitive", so I think the value was the "KEY", but I can't tell why it made no change before

tankren,

That is why I was surprised by your initial response. As I mentioned I have experimented with these for weeks. Changing to non-sensitive (unempfindlich) makes a world of difference.

JEG23

Can't wait until my car gets out of service to try this. Having headlights on in the middle of a bright Southern California day is superfluous.

Thanks for finding this!

Originally Posted by gicamuci

canadian 01/2011 535ix

The default werte values I have are different and still finding them too sensitive:

JBBF->3530 RLS, 0C->RLS_DEF_FLC_SCHWELLWERT_SATZ-> empfindlich/werte=02

JBBF->3530 RLS, 0C->RLS_FLC_SCHWELLWERT_SATZ -> empfindlich/werte=02

Choices for both are:

normal/werte=01
empfindlich/werte=02
unempfindlich/werte=03
sehr_empfindlich/werte=04

I'll try unempfindlich/werte=03 and see how it goes before changing its werte to 01

Mine were set the same and I set the same. Haven't had a chance to drive and test yet.

Originally Posted by snj1013

Mine were set the same and I set the same. Haven't had a chance to drive and test yet.

snj1013,

Do not set the werte just set to unempfindlich.

JEG23

Jeg i think you deserve a PHD in Coding

Originally Posted by DreamCar

Jeg i think you deserve a PHD in Coding

DreamCar,

That is nice of you. How many bananas before I get the PhD?

JEG23

Originally Posted by JEG23

DreamCar,

That is nice of you. How many bananas before I get the PhD?

JEG23

You have to contact the Dean Shawn for bananas he has patented them
you can ask Sean to write a recomendation letter for you.

Jokes aside thanks for all your new findings.

Originally Posted by DreamCar

You have to contact the Dean Shawn for bananas he has patented them
you can ask Sean to write a recomendation letter for you.

Jokes aside thanks for all your new findings.

I think it is more like Provost Shawn!

He is pretty stingy with the Bananas

It is fun to find new functions, but my car is going to explode at some point. I am testing so many things at the same time, that every time I hit a pothole, I think my car finally felt apart.

JEG23

Originally Posted by JEG23

It is fun to find new functions, but car is going to explode at some point. I am testing so many things at the same time, that every time I hit a pothole, I think my car finally felt apart.

JEG23

I really envy you, i wish i had my car

Originally Posted by JEG23

snj1013,

Do not set the werte just set to unempfindlich.

JEG23

Yes, that's what I did.

Originally Posted by snj1013

Yes, that's what I did.

snj1013,

How do you like it?

JEG23

I may meet up with Shawn next week if he finds the time. I'll get him drunk and make him confess on a hidden camera that you get the bananas

Originally Posted by ilhan1103

I may meet up with Shawn next week if he finds the time. I'll get him drunk and make him confess on a hidden camera that you get the bananas

Originally Posted by JEG23

I think it is more like Provost Shawn!

He is pretty stingy with the Bananas

It is fun to find new functions, but my car is going to explode at some point. I am testing so many things at the same time, that every time I hit a pothole, I think my car finally felt apart.

JEG23

This calls for the Banana Boat Song...



Day O, day O
Daylight come and me wan' go home
Day, me say day, me say day, me say day
Me say day, me say day O
Daylight come and me wan' go home

Work all night on a drink of rum
(Daylight come and me wan' go home)
Stack banana till the mornin' come
(Daylight come and me wan' go home)

Come, Mister Tally Man, tally me banana
(Daylight come and me wan' go home)
Come, Mister Tally Man, tally me banana
(Daylight come and me wan' go home)

Lift six foot, seven foot, eight foot bunch
(Daylight come and me wan' go home)
Six foot, seven foot, eight foot bunch
(Daylight come and me wan' go home)

Originally Posted by shawnsheridan

This calls for the Banana Boat Song...

You may have exeeded the authorized post limit! I am going to consult the forum user manual and decide how to proceed from here . Being out of the country does not allow you to break the rules! That's not how we do things in the BMW Coding and Programming forum I'm also not sure singing is authorized either.

Thanks to JEG23 I've been testing this for a while. Changing the "werte" selections definitely changes the sensors behavior.

Sean

Originally Posted by ImSW1

You may have exeeded the authorized post limit! I am going to consult the forum user manual and decide how to proceed from here . Being out of the country does not allow you to break the rules! That's not how we do things in the BMW Coding and Programming forum I'm also not sure singing is authorized either.

Thanks to JEG23 I've been testing this for a while. Changing the "werte" selections definitely changes the sensors behavior.

Sean

Day O, day O....