[amutti]

So I've found all kinds of stuff on the internet on how to reverse Decoding, Variable Light Distribution and Decoding Anti-Glare High-Beam Assistant. None of it is super straightforward, some seems contradictory, and there is a lot of back and forth about if North American cars have the correct equipment. Let's not have debate as to whether the car has the correct equipment (though I like the argument, why would it be decoded if it couldn't do it), has anyone successfully recoded it? Is there a straightforward guide somewhere? My fully equipped M240i will be delivered to me next weekend and both have been decoded. This is one of the mods I'm interested in doing.

[amutti]

Bumping this. I can't believe no one has done this....

[CKr]

This isn't likely the answer you were hoping for, but the short answer to your question is: nobody knows. You're finding a lot of conflicting information because no one has been able to confirm, with 100% certainty, that "no-glare high beam"/"anti-dazzle" works 100% as intended by BMW on North American/US-spec vehicles.

[amutti]

Originally Posted by CKr

This isn't likely the answer you were hoping for, but the short answer to your question is: nobody knows. You're finding a lot of conflicting information because no one has been able to confirm, with 100% certainty, that "no-glare high beam"/"anti-dazzle" works 100% as intended by BMW on North American/US-spec vehicles.

All good. I don't mind messing around a bit. Perhaps I'll stumble on to it

[CKr]

The following Bimmercode instructions have been documented many times in other threads, but here's what I have in my notes, based on my own findings (again, no different than what others have found) via VO coding with E-Sys:

For LCI cars equipped with adaptive LEDs removing 8S4 (VLD) from the vehicle order modifies two settings in FEM_BODY:

• C_AFS_ENA
• LUT_FLC_FORWARDLIGHTING_Y

while removing 5AP (anti-dazzle) modifies one additional setting in FEM_BODY:

• C_HBA_ENA

You can modify all three of these settings with Bimmercode, so there's no need to use E-sys to do the coding. Disclaimer: I can't help you if you run into issues with Bimmercode.

First, connect to car and enter expert mode

1. Using an iPhone, open Bimmercode and connect to your car
2. Scroll down and tap Front Electronic Module
3. Tap Expert mode at the bottom of the screen
4. Scroll down and tap 3073 LaMaster1

Second, enable VLD

First we'll enable C_AFS_ENA

1. Scroll down and tap C_AFS_ENA
2. Tap F020_enable (0x01) - you might also find that F030_enable (0x01) was automatically checked, this is expected.
3. Tap < to go up one level

Second we'll enable LUT_FLC_FORWARDLIGHTING_Y

1. Scroll down and tap LUT_FLC_FORWARDLIGHTING_Y
2. Tap F020_mit_AFS You'll see 0x9C 0x9C 0x9C below F020_mit_AFS
3. Tap < to go up one level

Third, enable anti-dazzle

1. Scroll down and tap C_HBA_ENA
2. Tap F020_enable (0x01) - you might also find that F030_enable (0x01) was automatically checked, this is expected.
3. Tap < to go up one level

Finally, code to car

1. Tap Code

Note that some older instructions will also tell you to enable C_HBA_ADAPT_SHUT_ENA, but I've found that this setting is not modified when VO coding or coding the car with Euro settings. This settings is likely used for the older adaptive HID headlights. With that said, you can enable this setting if you like, it does not seem to throw any errors.

Again, nobody has been able to confirm that anti-dazzle behaves correctly on LCI vehicles equipped with adaptive LEDs.

How do I know if the coding worked?

To verify that VLD is enabled:

• Start your car's engine and turn on headlights using the automatic setting
• Put your car in drive, you should see your left beam pan to the left
• Put your car in reverse, you should see your left beam pan toward the right

For a manual transmission, putting the car in reverse causes the left headlight to pan right, and taking the car out of reverse causes the left headlight to pan left.

[amutti]

Originally Posted by CKr

The following Bimmercode instructions have been documented many times in other threads, but here's what I have in my notes, based on my own findings (again, no different than what others have found) via VO coding with E-Sys:

For LCI cars equipped with adaptive LEDs removing 8S4 (VLD) from the vehicle order modifies two settings in FEM_BODY:

• C_AFS_ENA
• LUT_FLC_FORWARDLIGHTING_Y

while removing 5AP (anti-dazzle) modifies one additional setting in FEM_BODY:

• C_HBA_ENA

You can modify all three of these settings with Bimmercode, so there's no need to use E-sys to do the coding. Disclaimer: I can't help you if you run into issues with Bimmercode.

First, connect to car and enter expert mode

1. Using an iPhone, open Bimmercode and connect to your car
2. Scroll down and tap Front Electronic Module
3. Tap Expert mode at the bottom of the screen
4. Scroll down and tap 3073 LaMaster1

Second, enable VLD

First we'll enable C_AFS_ENA

1. Scroll down and tap C_AFS_ENA
2. Tap F020_enable (0x01) - you might also find that F030_enable (0x01) was automatically checked, this is expected.
3. Tap < to go up one level

Second we'll enable LUT_FLC_FORWARDLIGHTING_Y

1. Scroll down and tap LUT_FLC_FORWARDLIGHTING_Y
2. Tap F020_mit_AFS You'll see 0x9C 0x9C 0x9C below F020_mit_AFS
3. Tap < to go up one level

Third, enable anti-dazzle

1. Scroll down and tap C_HBA_ENA
2. Tap F020_enable (0x01) - you might also find that F030_enable (0x01) was automatically checked, this is expected.
3. Tap < to go up one level

Finally, code to car

1. Tap Code

Note that some older instructions will also tell you to enable C_HBA_ADAPT_SHUT_ENA, but I've found that this setting is not modified when VO coding or coding the car with Euro settings. This settings is likely used for the older adaptive HID headlights. With that said, you can enable this setting if you like, it does not seem to throw any errors.

Again, nobody has been able to confirm that anti-dazzle behaves correctly on LCI vehicles equipped with adaptive LEDs.

How do I know if the coding worked?

To verify that VLD is enabled:

• Start your car's engine and turn on headlights using the automatic setting
• Put your car in drive, you should see your left beam pan to the left
• Put your car in reverse, you should see your left beam pan toward the right

For a manual transmission, putting the car in reverse causes the left headlight to pan right, and taking the car out of reverse causes the left headlight to pan left.

Well... the light move as described now... we'll see. Thanks!

[f22b58]

Different part numbers for the adaptive headlights according to RealOEM; USA vs Europe. When I had HBA coded they did not adapt as advertised. I had a full size truck pull over that I was following on a country road.

[amutti]

I'm not sure if the tunneling is working correctly. Pretty hard to tell if your the one behind. What I absolutely have observed is the left HB turning off and the right one pivoting to the right when there was a car in the oncoming lane. It happened more than a dozen times Sunday night.

[Rick.Null]

Originally Posted by amutti

I'm not sure if the tunneling is working correctly. Pretty hard to tell if your the one behind. What I absolutely have observed is the left HB turning off and the right one pivoting to the right when there was a car in the oncoming lane. It happened more than a dozen times Sunday night.

I have a 2018 F23 M240xi US Spec car. I coded as per the above instructions and can confirm what you said above. The left HB dipped while the right one remained when there was a car in an oncoming lane.

I will see if I can test tunneling as well tomorrow evening and post results.

Thanks for starting this thread!