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      09-25-2016, 07:22 AM   #89
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Quote:
Originally Posted by teaston View Post
Finally some success with this issue!!

Coopers looked at mine today and found a manufacturing defect with the roof light control unit!

They are replacing it on the 21st so I'll report back after then to confirm if it fixes it!
Any luck with the fix?

I did a bit of testing (if you can call it that) with my car, about an hours worth of driving (2 trips) without using ACC and they stayed off like they should. 30 mins using ACC as usual and one of them turned on by itself. ACC is looking more and more likely as the culprit.
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      09-25-2016, 08:11 AM   #90
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I also have an LCI F31 with ACC which has the intermittent rear reading light issue. First noticed it a couple of weeks after I got it at the beginning of June.

Things I've noticed:
- It only seems to happen in the dark (or perhaps only when headlights are lit). I'm pretty sure this is not just a case of only noticing it in the dark.
- It happens when ACC is inactive (ie has been used, cancelled but is still set) as well as when it's on. I don't know whether it's happened when ACC is off completely.

What I hadn't noticed until I read this thread is that I've only seen it happen on longer journeys (ie at least an hour into a journey).

My car has been into the dealer for it, as I initially assumed it was a one-off electrical fault. Cooper York were pretty good IMO - they failed to find anything wrong with it so immediately ordered a replacement light module, without any prompting from me.

The bad news is that the module was fitted a couple of weeks ago, just before I took the car away for a week. I've had several repeat incidents since then including the first time I've seen them both on, while being followed on a dark country road by an X5 with obviously the same adaptive LED issue that russellg has.

Will be curious to see whether teaston still has the issue following his module swap.
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      09-25-2016, 12:07 PM   #91
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Quote:
Originally Posted by DThr33
Quote:
Originally Posted by teaston View Post
Finally some success with this issue!!

Coopers looked at mine today and found a manufacturing defect with the roof light control unit!

They are replacing it on the 21st so I'll report back after then to confirm if it fixes it!
Any luck with the fix?

I did a bit of testing (if you can call it that) with my car, about an hours worth of driving (2 trips) without using ACC and they stayed off like they should. 30 mins using ACC as usual and one of them turned on by itself. ACC is looking more and more likely as the culprit.
Seems to have fixed them!

Did a pretty long run on Thursday using ACC all the way too.
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      09-26-2016, 05:00 AM   #92
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Bollocks! It hasn't fixed them!

Just looked back while 25 mins into a 30 min journey and one of the lights was on.
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      09-26-2016, 07:59 AM   #93
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I had time to spend waiting for the quack and read through this whole thread. It is ACC. No it's not. Yes it is. No it's not. Dealer found the issue. Oh no they didn't.

Damn Mulder and Skully are needed...

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      09-26-2016, 08:28 AM   #94
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Quote:
Originally Posted by WheresMyCar
I had time to spend waiting for the quack and read through this whole thread. It is ACC. No it's not. Yes it is. No it's not. Dealer found the issue. Oh no they didn't.

Damn Mulder and Skully are needed...

I'm pretty sure it's these actually:

[img]http://s12.postimg.org/6cnbc5zf1/IMG_4027.jpg[/img]
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Last edited by teaston; 09-26-2016 at 05:28 PM..
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      09-26-2016, 08:59 AM   #95
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Quote:
Originally Posted by teaston View Post
I'm pretty sure it's these actually:

http://s12.postimg.org/6cnbc5zf1/IMG_4027.jpg
Nah, can't be - I've definitely had the problem before midnight!
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      10-04-2016, 03:40 AM   #96
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Quote:
Originally Posted by teaston View Post
Bollocks! It hasn't fixed them!

Just looked back while 25 mins into a 30 min journey and one of the lights was on.
Any further joy?? I'm going to book mine in for it's first service in a few weeks. I also have the same issue.
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      10-04-2016, 12:35 PM   #97
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Quote:
Originally Posted by flintymutt
Quote:
Originally Posted by teaston View Post
Bollocks! It hasn't fixed them!

Just looked back while 25 mins into a 30 min journey and one of the lights was on.
Any further joy?? I'm going to book mine in for it's first service in a few weeks. I also have the same issue.
It's going back in for 2 days in a couple of weeks time for them to investigate further.
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      10-05-2016, 02:32 PM   #98
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Quote:
Originally Posted by teaston View Post
It's going back in for 2 days in a couple of weeks time for them to investigate further.
It's 100% linked to ACC. As soon as I turned mine on this morning up popped the rear passenger light.
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      10-05-2016, 02:36 PM   #99
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Quote:
Originally Posted by flintymutt View Post
It's 100% linked to ACC. As soon as I turned mine on this morning up popped the rear passenger light.
Ok I'll mention it to them thanks. It does make sense as my 330d didn't have ACC and didn't have this problem.

Why on earth does the ACC interfere with the interior lights though!!
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      10-05-2016, 02:43 PM   #100
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Quote:
Originally Posted by teaston View Post
Ok I'll mention it to them thanks. It does make sense as my 330d didn't have ACC and didn't have this problem.

Why on earth does the ACC interfere with the interior lights though!!
Don't let Derk hear you...
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      10-05-2016, 03:11 PM   #101
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My car has been in twice, no faults showing, computer says no. They took it on a test drive and used ACC and nothing happened, I explained it didn't always happen and I haven't figured out a pattern or a way to get it to do it.
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      10-05-2016, 03:12 PM   #102
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Originally Posted by Cherub77 View Post
My car has been in twice, no faults showing, computer says no. They took it on a test drive and used ACC and nothing happened, I explained it didn't always happen and I haven't figured out a pattern or a way to get it to do it.
Fortunately for me they did see it happen on my car!
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      10-05-2016, 03:57 PM   #103
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Don't let Derk hear you...
If only we knew who Derk was..
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      10-05-2016, 04:02 PM   #104
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Quote:
Originally Posted by Drek
Quote:
Originally Posted by Random75 View Post
Don't let Derk hear you...
If only we knew who Derk was..
Derk Diggler? :
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      10-05-2016, 04:15 PM   #105
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Derk Diggler? :
Methinks somebody's fat fingers had an ND and was trying to have a pop at yours truly.
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      10-05-2016, 04:47 PM   #106
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It's like watching the first 5 minutes of Columbo...
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      10-16-2016, 02:55 PM   #107
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Ha... You can add me to the list now...

I will report back any useful observations as I note more, but this has happened to me a couple of times now whilst on longer drives...

Yes, I have ACC and yes I was using it a fair bit...

Damn trouble is that on the two times I have had it happen, I have not noticed the precise moment it pops on to see what I was doing...

The switch is electronic, not mechanical, right.? So the "system" is obviously thinking it's being told to turn the light on somehow...

Either that, or we all have ghost cars and there's a ghost apocalypse going to happen sometime soon..!!!
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      10-16-2016, 03:01 PM   #108
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Quote:
Originally Posted by DaveA
Ha... You can add me to the list now...

I will report back any useful observations as I note more, but this has happened to me a couple of times now whilst on longer drives...

Yes, I have ACC and yes I was using it a fair bit...

Damn trouble is that on the two times I have had it happen, I have not noticed the precise moment it pops on to see what I was doing...

The switch is electronic, not mechanical, right.? So the "system" is obviously thinking it's being told to turn the light on somehow...

Either that, or we all have ghost cars and there's a ghost apocalypse going to happen sometime soon..!!!
Yes i think it must be software related, like somewhere in the code it's sending the "turn on the reading light" instruction when it shouldn't be!
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      10-16-2016, 04:41 PM   #109
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teaston When's yours back in for tests? I had to postpone mine due to being away, and was hoping you'd know something more before it goes back in
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      10-16-2016, 04:42 PM   #110
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teaston When's yours back in for tests? I had to postpone mine due to being away, and was hoping you'd know something more before it goes back in
It's going in Tuesday for 2 days. I'm not confident they'll fix it tbh
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