Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #21  
Old 09-21-2016, 05:43 PM
Member
 
Join Date: Jul 2016
Location: North Jersey
Posts: 323
O3X5 is on a distinguished road
thought so. mine was made in September '03 lol
__________________
Inherited 2003 Grey Green/Pastel Green M54
Reply With Quote

Sponsored Links

  #22  
Old 09-28-2016, 02:23 PM
Lowblock's Avatar
Member
 
Join Date: Jul 2009
Location: Oregon
Posts: 230
Lowblock is on a distinguished road
Quote:
Originally Posted by wpoll View Post
Change occurred at 10/03 so early 03's don't have it - late 03's do....
Build date on mine is 06/03 and I have it. I know because when I went to put an aftermarket tow package I had to tap into the LCM HMBL to get the brake signal for the brake control and the Wiring harness had to be compatible with PWM so the tail/running lights on the trailer would work correctly.
Reply With Quote
  #23  
Old 09-28-2016, 02:39 PM
Member
 
Join Date: Jul 2016
Location: North Jersey
Posts: 323
O3X5 is on a distinguished road
Quote:
Originally Posted by Lowblock View Post
Build date on mine is 06/03 and I have it. I know because when I went to put an aftermarket tow package I had to tap into the LCM HMBL to get the brake signal for the brake control and the Wiring harness had to be compatible with PWM so the tail/running lights on the trailer would work correctly.
Interesting since mine was built 3 months later yet I don't have it.

or maybe I do?
__________________
Inherited 2003 Grey Green/Pastel Green M54
Reply With Quote
  #24  
Old 09-28-2016, 04:26 PM
wpoll's Avatar
Member
 
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 2,527
wpoll will become famous soon enough
Quote:
Originally Posted by Lowblock View Post
Build date on mine is 06/03 and I have it. I know because when I went to put an aftermarket tow package I had to tap into the LCM HMBL to get the brake signal for the brake control and the Wiring harness had to be compatible with PWM so the tail/running lights on the trailer would work correctly.
Turns out this is more complicated than I (or maybe anyone!) thought...

The tail light difference is dependent on the inclusion of Xenon lighting, the build date and intended market.

According to the wiring diagrams, all cars up to build date 09/01 didn't have the PWM tails. From 09/01 until 09/02 all USA cars got the "force-dependent brake light function" feature, not using the PWM feature but using an extra lamp. The rest of the world never got this configuration. From 09/02 in the USA and 10/03 in the ROW all cars got PWM tails, including the "force-dependent brake light function".

But it also looks like the "force-dependent brake light function" may have been included in the ROW Xenon package when it was selected as an option, so even though the wiring diagrams indicated that no ROW car had PWM tails until 10/03 and all USA cars had it from 09/02, I'm pretty sure there are exceptions.

At any rate, there are at least twelve different tail light wiring configurations!

USA Halogen - 09/99 - 09/01
USA Xenon - 09/99 - 09/01
USA Halogen - 09/01 - 09/02
USA Xenon - 09/01 - 09/02
USA Halogen - 09/02 - 10/03
USA Xenon - 09/02 - 10/03
USA Halogen - 10/03 - ??/06
USA Xenon - 10/03 - ??/06
ROW Halogen - 09/99 - 10/03
ROW Xenon - 09/99 - 10/03
ROW Halogen - 10/03 - ??/06
ROW Xenon - 10/03 - ??/06

All bets are off!!!
__________________
Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
Reply With Quote
  #25  
Old 09-28-2016, 04:53 PM
Member
 
Join Date: Jul 2016
Location: North Jersey
Posts: 323
O3X5 is on a distinguished road
So the brake light has different stages? About to pull in backwards across the street against the storefront to check lol
__________________
Inherited 2003 Grey Green/Pastel Green M54
Reply With Quote
  #26  
Old 09-28-2016, 05:23 PM
deepblonde's Avatar
Member
 
Join Date: Sep 2012
Location: Australia, Melbourne
Posts: 224
deepblonde is on a distinguished road
Quote:
Originally Posted by wpoll View Post
This is why you need to add capacitors to non-facelift LED tails when fitted to a facelift model- the PWM signal won't work with the LEDS properly without some sort of averaging circuit (a capacitor). This averaging is done by the tungsten filament in normal incandescent tail lights.

This PWM is nothing to do with cold-monitoring - although that is there too. The PWM system driving the tails cannot be controlled by coding - you would need to replace the LCM.
Are you sure about that wpoll? :

http://www.xoutpost.com/bmw-sav-foru...ght-diy-3.html
__________________
X5 3.0d Sport, 2006 LeMans Blue, Six-Speed ZF auto, Panoramic roof, Intravee II, Navigation, etc...
Reply With Quote
  #27  
Old 09-28-2016, 05:34 PM
wpoll's Avatar
Member
 
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 2,527
wpoll will become famous soon enough
Quote:
Originally Posted by deepblonde View Post
I'm not sure about anything with the tails anymore...

BUT, it doesn't make sense to be able to change the mark/space ratio in coding, or at least too much, as that defeats the functionality.

My guess it the value you are adjusting is actually the frequency of the PWM, which will have the same (visual) effect as adding the capacitors. The caps smooth out the pulses so you can't see them - the higher frequency makes the pulses too fast to see. Same same...
__________________
Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
Reply With Quote
  #28  
Old 09-28-2016, 05:37 PM
wpoll's Avatar
Member
 
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 2,527
wpoll will become famous soon enough
Quote:
Originally Posted by O3X5 View Post
So the brake light has different stages? About to pull in backwards across the street against the storefront to check lol
Given that the "force-dependent adaptive brake light" function is driven from the state of the ABS and the deceleration sensors in car, it might be hard get it to activate - I've never managed it.

Haven't reversed through a storefront either..!
__________________
Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
Reply With Quote
  #29  
Old 09-28-2016, 05:44 PM
deepblonde's Avatar
Member
 
Join Date: Sep 2012
Location: Australia, Melbourne
Posts: 224
deepblonde is on a distinguished road
Quote:
Originally Posted by wpoll View Post
I'm not sure about anything with the tails anymore...

BUT, it doesn't make sense to be able to change the mark/space ratio in coding, or at least too much, as that defeats the functionality.

My guess it the value you are adjusting is actually the frequency of the PWM, which will have the same (visual) effect as adding the capacitors. The caps smooth out the pulses so you can't see them - the higher frequency makes the pulses too fast to see. Same same...
Yes, I think that is what I'm guessing is happening;
The reason such options would have been provided on the assembly line for easy provision for change,
I'm guessing,
was to provide an easy way to alter the brightness of the tail and brake lights.

Three years now ,

and no capacitors ,

No flicker;

and no problems with my LED tail lights!
__________________
X5 3.0d Sport, 2006 LeMans Blue, Six-Speed ZF auto, Panoramic roof, Intravee II, Navigation, etc...

Last edited by deepblonde; 09-28-2016 at 05:59 PM.
Reply With Quote
  #30  
Old 09-28-2016, 05:55 PM
wpoll's Avatar
Member
 
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 2,527
wpoll will become famous soon enough
Quote:
Originally Posted by deepblonde View Post
Yes, I think that is what I'm guessing is happening;
The reason such options would have been provided on the assembly line for easy provision for change,
I'm guessing,
was to provide an easy way to alter the brightness of the tail and brake lights.

Three years now ,
and no capacitors ,
no flicker,
and no problems with my LED tail lights!
Nice find, deepblonde!
__________________
Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
Reply With Quote
Reply

Bookmarks

Tags
facelift, led, led tail lights

Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 01:28 AM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.