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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > BMW Coding > Adaptive headlight error - need help



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      11-11-2019, 10:34 PM   #23
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I tried to reply, but not sure if it went through. Yes, that would be fine.
Thanks for the help Joe@TopGearSolutions

Everything is working except this left AHL. You might be right about checking fuses and wires. I dug a little deeper and found that I can read voltage from the right side SMC but not the left side.
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      11-12-2019, 02:42 AM   #24
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Originally Posted by bimmerfan1972 View Post
I tried to reply, but not sure if it went through. Yes, that would be fine.
Thanks for the help Joe@TopGearSolutions

Everything is working except this left AHL. You might be right about checking fuses and wires. I dug a little deeper and found that I can read voltage from the right side SMC but not the left side.
So how did you get NCS working? In case others come across the same problem...
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      11-12-2019, 09:04 AM   #25
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So how did you get NCS working? In case others come across the same problem...
NCS was already working. Joe remoted in and downloaded all of the latest daten files. So, nothing really changed, but now I know the problem is not with old or corrupted daten files.

What I am referring to is, I went to ISTA-D and ran the test plan and did some other things. You can go into the diagram, where you see all of the ECU modules, select the ECU, in my case the FRM. You can drill in further and select a component, I picked the right SMC. It was showing voltage, changing between 11 and about 11.5, so I know it was reading actual voltage. I then tried the same thing for the left side and did not get a reading at all. That's why I think I may have received a bad unit or there is something else wrong, wiring, fuse, etc.

I'll see if I can get the exact sequence of what I did in some screenshots later tonight if that is helpful.
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      11-12-2019, 11:24 AM   #26
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I had the exact same problem as you after changing an AHL headlight.

In my case, it was the chipset inside the headlight that was missing from the new one. Part number 10 below:
https://www.realoem.com/bmw/enUS/sho...diagId=63_1208

[IMG]https://www.realoem.com/bmw/photos/63117182396[/img]

A damaged or missing #10 results in a failure to code the modules on either side resulting in the "ECU BUSY" error when attempting to code it. This is exactly what happened to me. I bet the part you have is defective.

Did you buy #10 or #9?
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      11-12-2019, 12:37 PM   #27
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6ixSpd

That's a good question. I purchased this one here, can you tell?

http://xenonland.com/product/1405/le...4-7189311.html
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      11-12-2019, 03:47 PM   #28
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That looks to be correct. Double check your connections in there too, and make sure none of the pins are damaged or corroded.

The headlights moving up or down doesn't indicate whether you have a functioning AHL module. Even non-AHL ones do that.
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      11-12-2019, 03:59 PM   #29
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So can you code the other module? The one that isn't damaged...
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      11-12-2019, 10:10 PM   #30
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The headlights moving up or down doesn't indicate whether you have a functioning AHL module. Even non-AHL ones do that.
Ok, I was beginning to suspect that. The left one moves on ignition start. I can move the right side by using the active test function, but not the left. I get the ecu_busy_repeat_request error.
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      11-12-2019, 10:11 PM   #31
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So can you code the other module? The one that isn't damaged...
I actually can't code either module. But as I said, I can manually move the right side by active test, but not the left.
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      11-13-2019, 06:12 PM   #32
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Your issue is, most probably, at the wires. One of them at least got pinched and corroded. There are no fuses for you to check.

So, first check that, after you entered your key in the slot and pressed one time without starting the car the start/stop button, you have 12V between pins 9 and 11 at the left headlight connector.

Post your result here, and we will check further if needed.
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      11-13-2019, 10:23 PM   #33
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Your issue is, most probably, at the wires. One of them at least got pinched and corroded. There are no fuses for you to check.

So, first check that, after you entered your key in the slot and pressed one time without starting the car the start/stop button, you have 12V between pins 9 and 11 at the left headlight connector.

Post your result here, and we will check further if needed.
Ok, will take me some time to do this. Probably won't get to it until this weekend.
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