****, I do not know what welcome light are since I turned all that gibberish off.On my 2012, my welcome lights aren't turning on everytime. Maybe about 50% of time when I unlock it turns on.
Anyone know the reason why? Bad battery? FRM?
LOLDoubt it would be a profile thing as Ace said it works 50% of the time. Maybe you have a faulty fuse that doesn't send power every single time the button is hit? (Not sure if the welcome lights have a separate fuse or not).
hey, thanks for this. I did a similar search and also noticed some postulates on this concept as well. Here's the weird thing that did happen two weeks ago....I did a really quick search, nothing definitive. One common topic thougt might be a relationship between battery charge/state and will the bmw intelligent system.
If the battery is marginal, or has a margina charge, or the car thinks it is, does in prevent 'unnecessary' loads?
Do you notice any patterns? like the welcome light works after youve done same major driving...and seems not to work after a day of running around with short, 2, 5, 10 mile drives? Always works after the battery has been charged on a charger, etc?
All I got...
A "low battery warning," or Increased Battery Discharge? I have never heard of a low battery warning - that would be a real blessing indicating time to replace the battery. Increased Battery Discharge is caused by battery discharge greater than about 80 mA (varies with model) with the vehicle OFF. The advice to put the car on a booster while coding and using Ivini's Carly is likely to avoid this warning.Intelligent Battery Sensor
The intelligent battery sensor IBS is a mechatronic component. The IBS with its own microcontroller which continually measures the following parameters:
***8226; Battery terminal voltage
***8226; Battery charge/discharge current
***8226; Battery acid temperature
The IBS is located directly on the battery negative terminal and is used on all current BMW vehicle.
The intelligent battery sensor (IBS) is part of the power management system. The IBS is used to determine precisely the "state of charge" (SoC) and the "state of health" (SoH) of the battery.
The software in the IBS controls the process and communication with the DME (Digital Motor Electronics) control unit. The IBS sends the data via the bit-serial data interface (BSD) to the DME. The following functions are integrated in the IBS:
***8226; Continuous measurement of the battery current, voltage and temperature under all vehicle operating conditions.
***8211; When the vehicle is stationary, the measured values are interrogated cyclically every 40 s to save power. The measuring period of the IBS is approx. 50 ms. The measured values are entered in the closed-circuit current histogram in the IBS.
***8226; The state of battery charge (SoC) is partly calculated.
***8211; The DME/DDE reads out the closedcircuit current histogram after the vehicle is restarted. A corresponding entry is made in the fault code memory of the DME if a closedcircuit current infringement is determined.
***8226; The IBS sends the data via a bit-serial data interface to the DME.
***8226; Calculation of the battery indicators as the basis for the state of charge (SoC) and state of health (SoH) of the battery.
***8211; The battery indicators are charge and discharge current, voltage and temperature of the vehicle battery.
***8226; Balancing of the charge and discharge currents of the battery.
***8226; Permanent monitoring of the state of battery charge.
***8211; Transmission of date in the event of a deficit.
***8226; Calculation of the current progression when starting the engine to determine the state of battery health.
***8226; Closed-circuit current monitoring of the vehicle. (This is the function giving the Increased Battery Discharge warning.)
Battery Tender***8482; is a Deltran trademark product with a maximum output of less than 2 Amps (last I looked). If your 100 AH battery is dead, then it will take about fifty hours on a Deltran Battery Tender***8482; to fully charge it.Doug, thanks for the tip, I'll put the X5 on a tender tonight when I get home.
Ah.... The staff these days...my wife disclosed to me this morning that she got the increased battery discharge warning almost every day for the last two weeks, and she didn't tell me....then she claimed that she told me 2 weeks ago....
Anyways, the X5's on a tender all day today and we'll see how it goes.