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
  #11  
Old 05-18-2020, 01:43 PM
Member
 
Join Date: Nov 2014
Location: SF Bay Area
Posts: 1,423
oldskewel is on a distinguished road
A simple way to continuously monitor the state of charging under the full range of load / driving conditions is to buy one of these on eBay for $2 (probably more if you need it soon) and stick it in the 12V power outlet.

Name:  car voltage gauge.jpg
Views: 154
Size:  29.5 KB

Good tool to have even before you have any problems so you can figure out your car's voltage profile before anything goes bad.
__________________
2001 X5 3.0i, 203k miles, AT, owned since 2014
Reply With Quote

Sponsored Links

  #12  
Old 05-18-2020, 03:51 PM
Member
 
Join Date: Jan 2013
Location: Finland
Posts: 1,376
Clavurion is on a distinguished road
Or check the voltage on cluster hidden menu.
__________________
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
Reply With Quote
  #13  
Old 05-18-2020, 03:54 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
The problem with either of those is they won't catch momentary dips or peaks. Not that they won't catch a dip long enough to catch the problem I usually recommend first to use the hidden OBC menu.


Sent from my iPhone using Tapatalk Pro
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #14  
Old 05-18-2020, 04:52 PM
Member
 
Join Date: Jan 2013
Location: Finland
Posts: 1,376
Clavurion is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
The problem with either of those is they won't catch momentary dips or peaks. Not that they won't catch a dip long enough to catch the problem I usually recommend first to use the hidden OBC menu.
The cluster update rate is not the fastest but if the voltage fluctuations causes various warning lights I would guess that it would show on OBC hidden menu.
__________________
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
Reply With Quote
  #15  
Old 05-18-2020, 04:59 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
if the dip is long enough to make lights come on the dash board you should be able to see it.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #16  
Old 05-19-2020, 11:18 AM
Member
 
Join Date: Jun 2013
Location: Virigina, USA
Posts: 2,573
StephenVA is on a distinguished road
Guys, finding a alternator on a BMW 3.0 engine going south is not rocket science. To quote the previous post by Andrew, "use a DMM that has min/max capability or a scanner like Foxwell which has graphical capabilities". Road test and record as you drive over bumps, stop and go, highway, etc.

If the voltage jumps back and forth between charging voltage and battery at rest voltage, you have a problem with a alternator, wiring connections and or grounds.

Take a few seconds, hook up your DVM and check your battery voltage and do a volt drop test on the battery grounds and cables, clean the jumper points under the hood. Set your meter to min/max and go for a drive! SIMPLE

Base line numbers
Battery Voltage should be 12.6+V (Key off) See chart below.
Battery voltage should be 13.5v - 14.5v on running tests (note large fluctuations at running RPMs is a SURE sign that the Volt Regulator is not doing its job. Smack with rubber hammer and retest. Rebuilt units have large variance of quality control from good 85% of the time to approx 50/50%.

NOTE: The exact charging voltage will vary according to the battery's state of charge, the load on the vehicle's electrical system, and temperature. The lower the temperature the higher the charging voltage, and the higher the temperature the lower the charging voltage. The "normal" charging voltage on a typical application might be 13.8 to 14.3 volts at 77 degrees F. But at 20 degrees F. below zero, the charging voltage might be 14.9 to 15.3 volts. On a hot engine on a hot day, the normal charging voltage might drop to 13.5 to 14.3 volts.

Get a new unit that matches you old one Brand and max AMP output.

https://www.ecstuning.com/b-valeo-pa...317501599~val/
Attached Images
  
__________________

2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
Reply With Quote
  #17  
Old 05-19-2020, 12:01 PM
Member
 
Join Date: Jan 2013
Location: Finland
Posts: 1,376
Clavurion is on a distinguished road
Quote:
Originally Posted by StephenVA View Post
NOTE: The exact charging voltage will vary according to the battery's state of charge, the load on the vehicle's electrical system, and temperature. The lower the temperature the higher the charging voltage, and the higher the temperature the lower the charging voltage. The "normal" charging voltage on a typical application might be 13.8 to 14.3 volts at 77 degrees F. But at 20 degrees F. below zero, the charging voltage might be 14.9 to 15.3 volts. On a hot engine on a hot day, the normal charging voltage might drop to 13.5 to 14.3 volts.
Valid on newer vehicles with IBS. On these older ones the charging voltage should be very stable regardless of the situation.
__________________
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
Reply With Quote
  #18  
Old 05-19-2020, 12:32 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
I think all e53 have Irritable bowel syndrome


Sent from my iPhone using Tapatalk Pro
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #19  
Old 05-19-2020, 12:54 PM
Member
 
Join Date: Jan 2013
Location: Finland
Posts: 1,376
Clavurion is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
I think all e53 have Irritable bowel syndrome.
I agree. Either that or Colitis ulcerosa, but no Intelligent Battery Sensor.
__________________
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
Reply With Quote
  #20  
Old 05-19-2020, 01:06 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 10,818
andrewwynn will become famous soon enough
Coreect not until e70. I've programmed new batteries on other BMW and it's very interesting to read the histogram off of the (other) IBS. It will show how many hours at each state of charge broken down by 20% groups. 0-20,20-40,40-60 etc. It instantly confirmed my clients battery was shot when over the past six months or something the state of charge was mostly under 60 and almost entirely under 80.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
Reply

Bookmarks

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 08:03 AM.
vBulletin, Copyright 2024, 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.