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E60 (2004 - 2010)
BMW 5-Series (E60 chassis) was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E60 is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 05-26-2013, 02:26 AM
WR450 WR450 is offline
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Location: UK
 
Join Date: Oct 2011
Posts: 6
Mein Auto: E60 LCi 530d Msport
E60 Light control module fault 2007 LCI

Hello All,

Hoping for some advice and have posted in the correct section

The left hand angel eye of my 530d 2007 LCI stopped working. Being an electrical engineer, I thought I would do some diagnostics before sending to a local specialist. When checking I found that no voltage was getting to the lamp, upon further testing and some forum reading, I traced it back to the LCM module.

As the car was under warranty, I thought I would try my luck and see if it would be covered. For this I had to book into my garage of choice to be diagnosed.

I booked into a local BMW specialist I intended to use for all my future work and explained the situation.

Unfortunately neither the diagnostic work, nor the repair were coved under my warranty The garage was not very helpful and charged me full price for the diagnostics, then told me the LCM was faulty, which was exactly what i had told them when i booked it in..

The garage informed me that as the LCM had detected several short circuits, as a result had shut down and could no longer be reactivated. I found this hard to believe but the owner stood firm on this?

Anyway, after a frustrating conversation with the garage they informed me that I would have to purchase a new LCM and then have it coded back into the car. Once I had picked myself up off the floor at 900 for the job , I explained that this was not going to work for me! 900 for a bloody side light - surly not? The owner did however offer to code out the warning light for 120 but needed the car for a day, as he said it takes at least 4 hours to complete. Yeah thanks for nothing!

I asked if I could purchase a second hand unit and have this coded in. The garage replied with no, it would not be possible to recode to my car, as the mileage is held in the LCM and this would show as a discrepancy on the dashboard?


My options as I see them:
1. Pay the 900 and sulk....
2. Get a second hand LCM unit and have it coded in to the car, if this is possible?
3. As option 2 and do it myself buying the software and learning?
3. Take a feed from the working right side light and have it switch on a transistorised relay, bringing in a new fused supply for the light. This would however leave me with the annoying faulty light symbol.
4. Do option 3 and learn how to code the faulty light out of the system. If this is possible?

My Questions:
1. Can the LCM shut down this single output, never to be reactivated again
2. Can my original LCM be repaired?
2. Can I fit a second hand unit and have it recoded without taking away the authenticity of my mileage and displaying on the clocks.
3. If a second hand unit can be fitted, what software and cable is required and how difficult is the process.

I have no hesitation on learning how to either code a second hand LCM, or code the light out. I am an electrical engineer by trade; however I retrained some 15 years ago. I am now an IT support engineer.

Hopefully some of you have made it to the end and can offer some advice.

Thanks in advance
Mark
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  #2  
Old 05-26-2013, 07:34 AM
DJtoad DJtoad is offline
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Location: Ellicott City, MD
 
Join Date: Jul 2009
Posts: 319
Mein Auto: 2010 535i M Sport
Quote:
Originally Posted by WR450 View Post
Hello All,

Hoping for some advice and have posted in the correct section

The left hand angel eye of my 530d 2007 LCI stopped working. Being an electrical engineer, I thought I would do some diagnostics before sending to a local specialist. When checking I found that no voltage was getting to the lamp, upon further testing and some forum reading, I traced it back to the LCM module.

As the car was under warranty, I thought I would try my luck and see if it would be covered. For this I had to book into my garage of choice to be diagnosed.

I booked into a local BMW specialist I intended to use for all my future work and explained the situation.

Unfortunately neither the diagnostic work, nor the repair were coved under my warranty The garage was not very helpful and charged me full price for the diagnostics, then told me the LCM was faulty, which was exactly what i had told them when i booked it in..

The garage informed me that as the LCM had detected several short circuits, as a result had shut down and could no longer be reactivated. I found this hard to believe but the owner stood firm on this?

Anyway, after a frustrating conversation with the garage they informed me that I would have to purchase a new LCM and then have it coded back into the car. Once I had picked myself up off the floor at 900 for the job , I explained that this was not going to work for me! 900 for a bloody side light - surly not? The owner did however offer to code out the warning light for 120 but needed the car for a day, as he said it takes at least 4 hours to complete. Yeah thanks for nothing!

I asked if I could purchase a second hand unit and have this coded in. The garage replied with no, it would not be possible to recode to my car, as the mileage is held in the LCM and this would show as a discrepancy on the dashboard?


My options as I see them:
1. Pay the 900 and sulk....
2. Get a second hand LCM unit and have it coded in to the car, if this is possible?
3. As option 2 and do it myself buying the software and learning?
3. Take a feed from the working right side light and have it switch on a transistorised relay, bringing in a new fused supply for the light. This would however leave me with the annoying faulty light symbol.
4. Do option 3 and learn how to code the faulty light out of the system. If this is possible?

My Questions:
1. Can the LCM shut down this single output, never to be reactivated again
2. Can my original LCM be repaired?
2. Can I fit a second hand unit and have it recoded without taking away the authenticity of my mileage and displaying on the clocks.
3. If a second hand unit can be fitted, what software and cable is required and how difficult is the process.

I have no hesitation on learning how to either code a second hand LCM, or code the light out. I am an electrical engineer by trade; however I retrained some 15 years ago. I am now an IT support engineer.

Hopefully some of you have made it to the end and can offer some advice.

Thanks in advance
Mark
1. Yes and no. It will shut down a single output but it can be reactivated via a diagnostic command. However, it keeps track of the number of reactivations and will shut it down permanently once a certain number is reached. Sorry, I'm not sure what that number is (5?). You should be able to find out by googling it.

2. Since you're an electrical engineer, it may be possible as long as you can identify the defective component (probably a transistor/MOSFET) and find a replacement.

3. (well, the second #2 in your list). Don't believe so. I think the mileage can only be coded if it's a brand new unit.

4. See above -- don't believe a second hand unit is an option without triggering a tamper warning (you can't program the mileage on a used unit). As far as coding out the light, check the PM I sent you.
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  #3  
Old 05-26-2013, 02:38 PM
cinergi cinergi is offline
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Location: Montreal, Canada
 
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Posts: 149
Mein Auto: 2006 525i
It is possible to code a used LCM from another vehicle if you're willing to invest the time needed to get the required software installed and working on a laptop PC in addition to finding a used LCM. Here's a DYI post from someone who has done exactly this (not me):

http://www.bmwcoding.com/showthread....LM1-to-LM2-E60

(You might have to subscribe to that forum to see the post - I don't remember).

However, if there is indeed a short circuit somewhere in your wiring as the garage told you, track this down first using a multimeter and see if your current LCM starts working again.

Hope this helps!

cinergi

Last edited by cinergi; 05-26-2013 at 02:41 PM.
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  #4  
Old 05-30-2013, 07:04 AM
WR450 WR450 is offline
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Location: UK
 
Join Date: Oct 2011
Posts: 6
Mein Auto: E60 LCi 530d Msport
Kind thanks for your replies and assistance.

Just to update on this, I went about to establish the short circuit the garage told me about and get the number off the LCM unit for replacement.

I started to test to see if I could find the mentioned short circuit. Disconnected the LCM and tested both the headlight socket and LCM connector. I could find no short circuit to ground or between cores. I then tested the cable from the LCM to the light was fine by running a continuity test on it; again it was tested out ok.

At this point I was a little concerned, the garage told me the wire was short to ground! They were quite specific about this and insisted the cable would have to be replaced!! They even quoted low resistance when I pushed further. Although I did have my reservations at the time, I let this pass by. They also said the LCM had shut down due to the above shorts and could no longer be reactivated in the software; as such a new one was required!!!!

To test further, I then connected a variable voltage / current power supply unit and made a circuit out of the wire feeding the left hand side angel light. Again this was fine and I could not see any current drain off to ground or any other cable.

As the LCM was off the car I went about opening it up to see if I could see anything visible. The unit was dry and looked in perfect condition. NOTE: I would not like to repair any components on these units, all components are surface mounted, and soldering would need to be undertaken by a professional!

I reassembled the unit and noted the serial number down for later.

Having exhausted all my testing and finding no faults, I reconnected the head light socket and LCM unit.

To my amazement - the LIGHTS WORKED WITH NO ERRORS!!!!!

I can only assume that the LCM unit was reset with me removing it from the car for an hour or so, or the pins on the LCM were not in contact correctly, although other issues would have been shown if this was the case?

In conclusion the lights have been working for a few days without any errors, fingers crossed.

With regards the garage, it would appear they never tested the lighting circuit out, or they did and it is intermittent and the fault will reoccur again - only time will tell I guess? As for the LCM being faulty and shut down......Well, seems like a lie from my now untrustworthy garage!


Should the fault not present over the next few weeks, I am seriously considering going back to see the owner of the garage and demanding a refund of my 90 for the diagnostic or lack of, work he charged me for!
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  #5  
Old 05-30-2013, 07:15 AM
cinergi cinergi is offline
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Location: Montreal, Canada
 
Join Date: Apr 2009
Posts: 149
Mein Auto: 2006 525i
Good news, glad it worked out for you. Hopefully the short circuit is not intermittent and won't come back.

In my experience, very few garages (dealers included!) really understand the complex electronics in these cars and have the diagnostic equipment and expertise required to properly diagnose them, re-code modules, etc. It's easier to simply swap modules. Ironically, if they had installed a new LCM as they suggested, it would have probably worked and you would have thought that was the problem!

I recently requested a software upgrade from a BMW dealer and they actually refused, stating that there's a "99% chance it will fry some of my modules" because "these cars don't seem to like software upgrades" (their actual words!) Needless to say, I found another dealer that performed the upgrade with no issues.

-cinergi

Last edited by cinergi; 05-30-2013 at 07:16 AM.
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  #6  
Old 05-30-2013, 08:18 AM
pjinca pjinca is offline
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Location: SoCal
 
Join Date: Jun 2009
Posts: 2,090
Mein Auto: 2008 550i
It is definitely posible to code a second hand LCM, just make sure you get an LM2 module (your car is LCI). HOWEVER, when coding a used LCM you have a 50/50 chance that it will work. I upgraded my old 530 to LCI lights, which required a new LM2 module. I happened to get the LM2 included with the lights. I had a friend code it to the car and it worked perfectly, but he said that most of the time it doesn't work.
You can get 2 used LCM modules for about half the price of a new one, that way you increase your chances of having a working unit.
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Previous 3 cars (the 550 is my 38th car):
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  #7  
Old 05-31-2013, 03:07 AM
WR450 WR450 is offline
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Location: UK
 
Join Date: Oct 2011
Posts: 6
Mein Auto: E60 LCi 530d Msport
Thanks for the replies,

Hopefully the fault will not come back and i wont have to explore further!

If i do - trust me you will all know

Cheers
Mark
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  #8  
Old 05-22-2014, 02:50 AM
gmastra gmastra is offline
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Location: Brighton UK
 
Join Date: May 2014
Posts: 19
Mein Auto: E60 530d
Hi,
My left hand adaptive light will not move and the LM module is reportidly the culprit ( OBDII)
In your post you say thay you removed it and inspected it.
My question , is it easy to get out ? and how easy is it to open it to get to the PCB.
Am also an electronics engineer and have the equipment to repair surface mount components.
Did you take a picture of the PCB by any chance ?
Thanks
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