06-16-2020, 05:20 PM | #177 | |
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06-17-2020, 02:57 AM | #178 |
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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 |
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06-18-2020, 12:58 PM | #179 | |
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DanG10568.50 Killed by Death12335.00 |
06-18-2020, 01:12 PM | #180 |
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06-18-2020, 01:14 PM | #181 |
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07-15-2020, 12:47 PM | #182 |
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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. |
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07-15-2020, 04:14 PM | #183 | |
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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. |
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07-15-2020, 04:24 PM | #184 | |
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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. |
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07-15-2020, 04:29 PM | #185 | ||
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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 Last edited by Poochie; 07-15-2020 at 11:33 PM.. |
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07-15-2020, 05:10 PM | #186 | |
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07-15-2020, 05:25 PM | #187 | ||
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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 |
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07-15-2020, 05:48 PM | #188 | |
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That way dealers can't pull the "No Code" / "Could not replicate" B.S. |
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07-15-2020, 06:50 PM | #189 |
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Yup. I've been taking a picture every time it's happened for close to a year now. Have hundreds of pictures.
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07-17-2020, 06:48 AM | #191 |
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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.. |
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07-18-2020, 03:32 PM | #192 |
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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.
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07-18-2020, 11:22 PM | #193 | |
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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 |
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07-18-2020, 11:50 PM | #194 | |
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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. |
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07-19-2020, 12:12 AM | #195 | ||
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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.. |
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08-06-2020, 04:16 PM | #196 |
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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. |
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08-06-2020, 10:49 PM | #197 |
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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
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08-07-2020, 09:48 AM | #198 | ||
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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. |
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