BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW M2 Forum > BMW M2 Discussions > Right turn signal malfunction

Closed Thread
 
Thread Tools Search this Thread
      06-16-2020, 05:20 PM   #177
Poffman
Lieutenant
493
Rep
491
Posts

Drives: 2010 M3
Join Date: Jan 2017
Location: Seattle

iTrader: (3)

Quote:
Originally Posted by DanG View Post
Quote:
Originally Posted by Poffman View Post
Did you have that done with Alex at Seattle, Dan? I get this intermittently but haven't messed with it yet.
I used Nathan Morrisette at BMW Seattle. Alex was on vacation. But I was extremely impress with Nathan and will use him for my next service. He really cared about solving the problem.
Thanks Dan. I'll talk to Dylan about it and mention that you had the TSB done.
Appreciate 0
      06-17-2020, 02:57 AM   #178
Robin_NL
S0THPAW
Robin_NL's Avatar
8680
Rep
7,846
Posts

Drives: HS M2 Competition
Join Date: Apr 2005
Location: The Netherlands

iTrader: (0)

A few months ago my rear left turn signal started to malfunction by flashing very fast. After a while it stopped. Same story week later. Sometimes by restarting car it stopped, sometimes it stayed that way for minutes.

Anyway it happened a few more times. Dealer could not find anything in the car's 'system' , because that stuff insn't saved in the 'system' of the car they stated.

But they replaced the whole left rear light unit under warranty.

No problems since 3 months or so.

Cheers
Robin
Appreciate 0
      06-18-2020, 12:58 PM   #179
Anthony1s
Banned
756
Rep
2,149
Posts

Drives: 2018 Mineral Grey M2
Join Date: Oct 2017
Location: Pennsylvania

iTrader: (0)

Quote:
Originally Posted by Robin_NL View Post
A few months ago my rear left turn signal started to malfunction by flashing very fast. After a while it stopped. Same story week later. Sometimes by restarting car it stopped, sometimes it stayed that way for minutes.

Anyway it happened a few more times. Dealer could not find anything in the car's 'system' , because that stuff insn't saved in the 'system' of the car they stated.

But they replaced the whole left rear light unit under warranty.

No problems since 3 months or so.

Cheers
Robin
They're wrong about it not storing a code.

Appreciate 2
DanG10444.00
      06-18-2020, 01:12 PM   #180
DanG
Major General
DanG's Avatar
United_States
10444
Rep
6,878
Posts

Drives: 2018 M2 AW DCT
Join Date: Aug 2012
Location: Seattle, WA

iTrader: (1)

Garage List
2018 BMW M2  [7.68]
Quote:
Originally Posted by Anthony1s View Post
They're wrong about it not storing a code.

I agree. My technician was able to read a fault code also. What they said is that if the code was more than 90 days old it may get erased.
Appreciate 0
      06-18-2020, 01:14 PM   #181
Anthony1s
Banned
756
Rep
2,149
Posts

Drives: 2018 Mineral Grey M2
Join Date: Oct 2017
Location: Pennsylvania

iTrader: (0)

Quote:
Originally Posted by DanG View Post
I agree. My technician was able to read a fault code also. What they said is that if the code was more than 90 days old it may get erased.
Well good thing the blinker malfunctions 89 outta 90 days lol
Appreciate 0
      07-15-2020, 12:47 PM   #182
Anthony1s
Banned
756
Rep
2,149
Posts

Drives: 2018 Mineral Grey M2
Join Date: Oct 2017
Location: Pennsylvania

iTrader: (0)

My dealer is having someone come in to open a PUMA case on this. They're gonna spend a couple days with the car. Appt isn't until Aug 6th though, because the dealership is slammed with work. So much work that I felt bad and offered to reschedule in a few months to when things slow down. Like, the service manager was stressing out. But he told me not to worry about it and they can take care of it. Hopefully it ends with a TSB though for everyone to benefit from, because the only TSBs available don't apply to 2018+ cars.

I have to bring all my software back to stock and remove the tune, then use the blinkers until an error comes up, this way it's stored in the car computer for them to read. So I gotta learn ISTA+, cause I currently use Carly and it's having some issues to where I don't trust it for this. Also, I'm sure I can argue the tune doesn't affect the blinkers, because it doesn't touch the computer module the lights work from, but I'll remove it just to avoid the argument. I'm not gonna lie to them about having the car coded and tuned though, cause things always go downhill once trust is broken. But hopefully the tech doesn't argue that the tune and coding is causing it.
Appreciate 1
      07-15-2020, 04:14 PM   #183
Poochie
Luxury at the redline :)
Poochie's Avatar
United_States
9099
Rep
7,563
Posts

Drives: 2016 M2
Join Date: Aug 2012
Location: NYC

iTrader: (3)

Quote:
Originally Posted by Anthony1s View Post
My dealer is having someone come in to open a PUMA case on this. They're gonna spend a couple days with the car. Appt isn't until Aug 6th though, because the dealership is slammed with work. So much work that I felt bad and offered to reschedule in a few months to when things slow down. Like, the service manager was stressing out. But he told me not to worry about it and they can take care of it. Hopefully it ends with a TSB though for everyone to benefit from, because the only TSBs available don't apply to 2018+ cars.
If you do manage to pinpoint the issue, it's going to be a lack of ground wire polarity, it's always the grounding..

BMW when from three ground wires on the pre-LCI halogens, to just one ground on the LCI LEDs.

One might say that's three ground wires wasn't necessary because LED draws less power but I believe they miscalculated the need for ground polarity, causing the system to assume an error.
Appreciate 0
      07-15-2020, 04:24 PM   #184
Anthony1s
Banned
756
Rep
2,149
Posts

Drives: 2018 Mineral Grey M2
Join Date: Oct 2017
Location: Pennsylvania

iTrader: (0)

Quote:
Originally Posted by Poochie View Post
If you do manage to pinpoint the issue, it's going to be a lack of ground wire polarity, it's always the grounding..

BMW when from three ground wires on the pre-LCI halogens, to just one ground on the LCI LEDs.

One might say that's three ground wires wasn't necessary because LED draws less power but I believe they miscalculated the need for ground polarity, causing the system to assume an error.
I'm not doubting it's a grounding issue, because others in this thread have pinpointed that to be the case. However, my dealer won't do anything unless there is a TSB or approval from higher up.

As for your reason for the grounding issue, I am not sure that's correct. Because the '16 and '17 have a TSB for a taillight turn signal malfunction for the grounding wires. Though, I admit, I haven't looked at that TSB in a while, so I don't know exactly what it describes. But to say that pre-lci tailights do not have that issue because they have more grounding wires can't be true, because they have a documented TSB of their grounding issue... I guess they could've miscalculated the amount of grounding needed in both pre and post lci tho.
Appreciate 0
      07-15-2020, 04:29 PM   #185
Poochie
Luxury at the redline :)
Poochie's Avatar
United_States
9099
Rep
7,563
Posts

Drives: 2016 M2
Join Date: Aug 2012
Location: NYC

iTrader: (3)

Quote:
Originally Posted by Anthony1s View Post
Quote:
Originally Posted by Poochie View Post
If you do manage to pinpoint the issue, it's going to be a lack of ground wire polarity, it's always the grounding..

BMW when from three ground wires on the pre-LCI halogens, to just one ground on the LCI LEDs.

One might say that's three ground wires wasn't necessary because LED draws less power but I believe they miscalculated the need for ground polarity, causing the system to assume an error.
I'm not doubting it's a grounding issue, because others in this thread have pinpointed that to be the case. However, my dealer won't do anything unless there is a TSB or approval from higher up.

As for your reason for the grounding issue, I am not sure that's correct. Because the '16 and '17 have a TSB for a taillight turn signal malfunction for the grounding wires. Though, I admit, I haven't looked at that TSB in a while, so I don't know exactly what it describes. But to say that pre-lci tailights do not have that issue because they have more grounding wires can't be true, because they have a documented TSB of their grounding issue... I guess they could've miscalculated the amount of grounding needed in both pre and post lci tho.
I wrote this explanation so many times, I forget to clarify that the originally pre-LCI did have the same exact issue, until they added the three grounding..

Apparently, BMW didn't learn from their own TSB and when back to one ground for the LCI taillights..

Check to the TSB below, they added a new backing plate that can accommodate various ground circuits:

https://www.newtis.info/tisv2/a/en/f...ess/1VnZ8zZX2B
Attached Images
  

Last edited by Poochie; 07-15-2020 at 11:33 PM..
Appreciate 0
      07-15-2020, 05:10 PM   #186
Anthony1s
Banned
756
Rep
2,149
Posts

Drives: 2018 Mineral Grey M2
Join Date: Oct 2017
Location: Pennsylvania

iTrader: (0)

Quote:
Originally Posted by Poochie View Post
I wrote this explanation so many times, I forget to clarify that the originally pre-LCI did have the same exact issue, until they added the three grounding..

Apparently, BMW didn't learn from their own TSB and when back to one ground for the LCI taillights..

Check to the TSB below, they added a new backing plate that can accommodate various ground circuits:

https://www.newtis.info/tisv2/a/en/f...ess/1VnZ8zZX2B
Ahh. Thanks for clearing that up. Saved me, and the BMW techs I'm gonna see, a lot of time going back through the thread and reading through TSB.
Appreciate 0
      07-15-2020, 05:25 PM   #187
Poochie
Luxury at the redline :)
Poochie's Avatar
United_States
9099
Rep
7,563
Posts

Drives: 2016 M2
Join Date: Aug 2012
Location: NYC

iTrader: (3)

Quote:
Originally Posted by Anthony1s View Post
Quote:
Originally Posted by Poochie View Post
I wrote this explanation so many times, I forget to clarify that the originally pre-LCI did have the same exact issue, until they added the three grounding..

Apparently, BMW didn't learn from their own TSB and when back to one ground for the LCI taillights..

Check to the TSB below, they added a new backing plate that can accommodate various ground circuits:

https://www.newtis.info/tisv2/a/en/f...ess/1VnZ8zZX2B
Ahh. Thanks for clearing that up. Saved me, and the BMW techs I'm gonna see, a lot of time going back through the thread and reading through TSB.
Tell them to just add an additional wire and ground it off to somewhere in the chassis, it will save him hours of unnecessary labor.

The system is not that complicated to narrow down; there is a fuse, a US-spec MO hazard/turn signal flasher relay, some wiring and the taillight LEDs..

If every part checks out as properly functioning, process of elimination would narrow it down to a lack of ground polarity.

But I guess I'm just a random guy on the internet and he's the "expert," so let him spend that corporate money and come back down to the same conclusion.

Good luck
Appreciate 2
DanG10444.00
      07-15-2020, 05:48 PM   #188
Killed by Death
Brigadier General
Killed by Death's Avatar
12138
Rep
3,456
Posts

Drives: '23 X3 M40i
Join Date: Aug 2017
Location: North Carolina

iTrader: (0)

Quote:
Originally Posted by Robin_NL View Post
A few months ago my rear left turn signal started to malfunction by flashing very fast. After a while it stopped. Same story week later. Sometimes by restarting car it stopped, sometimes it stayed that way for minutes.

Anyway it happened a few more times. Dealer could not find anything in the car's 'system' , because that stuff insn't saved in the 'system' of the car they stated.

But they replaced the whole left rear light unit under warranty.

No problems since 3 months or so.

Cheers
Robin
These days everyone is carrying a video camera around in their pocket. ANYTIME I have a malfunction I record it!!!
That way dealers can't pull the "No Code" / "Could not replicate" B.S.
Appreciate 0
      07-15-2020, 06:50 PM   #189
Anthony1s
Banned
756
Rep
2,149
Posts

Drives: 2018 Mineral Grey M2
Join Date: Oct 2017
Location: Pennsylvania

iTrader: (0)

Quote:
Originally Posted by Killed by Death View Post
These days everyone is carrying a video camera around in their pocket. ANYTIME I have a malfunction I record it!!!
That way dealers can't pull the "No Code" / "Could not replicate" B.S.
Yup. I've been taking a picture every time it's happened for close to a year now. Have hundreds of pictures.
Appreciate 0
      07-15-2020, 10:23 PM   #190
19x
Banned
19x's Avatar
United_States
460
Rep
471
Posts

Drives: 2021 M2C
Join Date: Apr 2008
Location: ¯\_(ツ)_/¯

iTrader: (1)

Will 2021 models suffer the same fate?
Appreciate 0
      07-17-2020, 06:48 AM   #191
SpartanGA
Captain
SpartanGA's Avatar
United_States
97
Rep
643
Posts

Drives: 2018 BMW M4 Comp F83
Join Date: Feb 2007
Location: Atlanta, GA

iTrader: (0)

Took mine to dealer for standard service. Told them about issue. Said they saw it in computer and knew of the issue and replaced both taillight assemblies. Both sides. Hasn’t happened for me since

Last edited by SpartanGA; 08-13-2020 at 05:40 AM..
Appreciate 1
      07-18-2020, 03:32 PM   #192
TMR013
Opus Angelus
TMR013's Avatar
United_States
422
Rep
1,264
Posts

Drives: 2018 LBB M2 Coupe
Join Date: Apr 2009
Location: Chandler, AZ

iTrader: (0)

Well, if this is the biggest problem with the M2, probably shouldn't complain a lot. But it is a pain. Finally convinced the dealer to replace my right rear light assembly. Seemed to work fine for 8 months. Suddenly I'm getting the error message again. so it appears it's not the assembly itself. Might have to learn to live with it.
Appreciate 0
      07-18-2020, 11:22 PM   #193
Poochie
Luxury at the redline :)
Poochie's Avatar
United_States
9099
Rep
7,563
Posts

Drives: 2016 M2
Join Date: Aug 2012
Location: NYC

iTrader: (3)

Quote:
Originally Posted by TMR013 View Post
Well, if this is the biggest problem with the M2, probably shouldn't complain a lot. But it is a pain. Finally convinced the dealer to replace my right rear light assembly. Seemed to work fine for 8 months. Suddenly I'm getting the error message again. so it appears it's not the assembly itself. Might have to learn to live with it.

If you're familiar with coding, try to remove the bulb "warm checks" for the front and rear turn signals:


https://www.bimmerpost.com/forums/sh...php?p=26455807
Attached Images
 
Appreciate 2
Scrape37.50
      07-18-2020, 11:50 PM   #194
AndrewC1989
Brigadier General
AndrewC1989's Avatar
United_States
10904
Rep
4,537
Posts

Drives: 2015 328d xDrive
Join Date: Aug 2010
Location: NoVA

iTrader: (5)

Garage List
Quote:
Originally Posted by Poochie View Post
If you're familiar with coding, try to remove the bulb "warm checks" for the front and rear turn signals:


https://www.bimmerpost.com/forums/sh...php?p=26455807
+1

Just code it out with bimmercode. Not worth the hasstle of trying to get a dealer to properly fix it or the annoyance of looking at errors constantly.
Appreciate 2
Poochie9099.00
      07-19-2020, 12:12 AM   #195
Poochie
Luxury at the redline :)
Poochie's Avatar
United_States
9099
Rep
7,563
Posts

Drives: 2016 M2
Join Date: Aug 2012
Location: NYC

iTrader: (3)

Quote:
Originally Posted by AndrewC1989 View Post
Quote:
Originally Posted by Poochie View Post
If you're familiar with coding, try to remove the bulb "warm checks" for the front and rear turn signals:


https://www.bimmerpost.com/forums/sh...php?p=26455807
+1

Just code it out with bimmercode. Not worth the hasstle of trying to get a dealer to properly fix it or the annoyance of looking at errors constantly.
👍🏻

I know the dealers; they are not allotted enough labor allowance to properly investigate this issue or dedicate much time, even if they wanted to..

This is on the end-user here, to figure out themselves..

The dealership service techs will just keep unnecessarily replacing the taillight units, until the cows come home - or 'til the owner sells their vehicle, completely give up on trying to resolve the issue or their warrant expires.. Whichever comes first..

As someone like myself who did the LCI LED tail retrofit and many others in the 2er section, yet no one in this camp has encounter this rapid-flashing turn-signal issue, it only seems to occurs exclusively on factory-installed LED taillights.

So, based on this fact, its leading me to believe that a possible lack of ground polarity or improper turn signal LED set factory mapping is the cause of this issue.. I hedge by bet on the latter..
Appreciate 0
      08-06-2020, 04:16 PM   #196
Anthony1s
Banned
756
Rep
2,149
Posts

Drives: 2018 Mineral Grey M2
Join Date: Oct 2017
Location: Pennsylvania

iTrader: (0)

I dropped off my car this morning. Like I said in my last post, was supposed to have someone higher up come in to investigate and open a puma case. Well, the service manager I usually deal with is on vacation, and none of that was written down. It was pretty hectic last time I saw him, so I'm not gonna be hard on him for forgetting it. They said they'll still investigate the issue though and are still keeping my car for a few days.

Another solution I thought of... I can just pay out of pocket for them to perform the '16-'17 repair on my headlights. I asked about it, and they had no problem with me doing that.
Appreciate 0
      08-06-2020, 10:49 PM   #197
Al Bundy's Dodge
Captain
No_Country
1625
Rep
898
Posts

Drives: 2018 M2 6MT
Join Date: Jan 2018
Location: Denver

iTrader: (0)

Well I'm at the point where it malfunctions every time I drive now. Usually the second time I try to use the right turn signal. Then it's hit or miss for the remainder of the drive.

Annoying glitch but I don't think I can ignore anymore.

Poochie - thanks for your insight on the issue, never would have ever considered that
__________________
2009 328i xDrive 6MT (Retired and I miss her)
2015 335i xDrive 6MT (Retired and I dont miss her)
2018 M2 6MT (Never retiring)
Appreciate 1
Poochie9099.00
      08-07-2020, 09:48 AM   #198
detroitm2
Colonel
detroitm2's Avatar
United_States
2427
Rep
2,526
Posts

Drives: 2018 M2
Join Date: Aug 2018
Location: Michigan

iTrader: (2)

Garage List
2018 BMW M2  [0.00]
Quote:
Originally Posted by AndrewC1989 View Post
Quote:
Originally Posted by Poochie View Post
If you're familiar with coding, try to remove the bulb "warm checks" for the front and rear turn signals:


https://www.bimmerpost.com/forums/sh...php?p=26455807
+1

Just code it out with bimmercode. Not worth the hasstle of trying to get a dealer to properly fix it or the annoyance of looking at errors constantly.
Just tried coding it out as this has seemed to happen more frequently now. Will see how it works.

Side note, I'm running some aftermarket sweeping indicators on my mirrors, which seemed to make the problem appear more frequently. Not sure if it's related or not, suppose it could be since they're all interconnected.

Will report back later and let everyone know how it worked.
__________________
2018 M2 - Daily Driver/Track Car
Motorcity BMWCCA Member
Instagram | YouTube
Appreciate 1
Closed Thread

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 02:32 PM.




m2
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST