Anthro

Hi all,

2005 545i here.

I have only had this car a few weeks so I am still getting to know it and so far haven't done much except add the +NAUX code to get started on having some kind of streaming happening.

It needed a new battery. Some info:

1. New battery is a 90AH unit.
2. Old battery was an 80AH unit. Not a bad quality battery, but the kind you get when you are stranded and roadside assistance brings one to you.
3. VO had the battery coded as -B110.
4. INPA shows the battery capacity as 110AH.

I have managed to:

a. Register the battery. Or at least, get INPA to say "OKAY" when I try to do that.
b. clear the history (maybe I didn't need to do this)
c. change the VO to -B090 (including deleting the "-B110" entry, which it turns out can be done by pressing "delete" on the keyboard. Yes it took me a while to figure this out.)
d. FSW_PSW.TRC shows "KLASSE_BATTERIE" as "90ah" (I did not manually alter this, I assume changing the VO did this)

The problem I am having is that in INPA, when I click through to the relevant page, despite all of the above, the battery capacity in ah is still coming up as 110.

I assume this means that the battery management is still treating the new battery as 110ah.

Any suggestions on how to fix this? Do I need to fix this? What step did I miss?

Thanks... still learning here.

donpb

I'm pretty sure @seanjordan20 can answer your questions.

seanjordan20

NCS EXPERT
Load Profile>
Expert mode>
F2(chasis)>
Select E60 >
F6(back)>
F1 VIN/ZCS/FA>
F2 (Enter FA) >
Select E60 >
Confirm VIN>
Remove -B110 from popping out table (press Delete on -B110)>
Add new value of -B090>
F6(Back)>
F4 (Process ECU)>
Select CAS>
F2 (Change Job)-->
FA_Write-->
F3 (Eecute Job)-->
and finish.

INPA

GO TO E60 >
Engine >
MSD 80.0 >
Status Analog/Digital (F5) >
IBS - Powermanagement (F5) >
Batterietaush registrierne (F5)

If you follow these steps then you are good to go

Anthro

Thank you.

That is pretty much exactly what I thought I did! However when I go through INPA to check the battery management, I see that it still thinks the battery capacity is 110ah.

I will try redoing it and see what happens; maybe I made an error.

Jason

seanjordan20

Sometimes it takes some programming time to actually take. Usually when I code I do it at night and once I wake up in the morning it's there. I once coded and programmed my TCU and it just wasn't taking (so I thought). I gave up and when I went to start again the next morning it was there. I don't know why but somethings it takes the car to completely shut down to indicate the changes. Make sure you get it changed. You don't want the system to overcharge your new battery

Anthro

Thanks again. I did read something about the car needing to sleep, but it wasn't to do with battery swaps and I didn't take notic​e of it.

​​​I think I read it's something like 2-3 hours from shutdown until sleep mode. Maybe there are some checks the system only does when waking from sleep.

I will check today whether anything has changed.

Anthro

Thank you. I will check this again, hopefully today.

I did read that somewhere about the car needing to sleep to pick up some coding changes but I didn't think of it because it was not in the context of battery swaps. Fingers crossed it is already okay, you never know your luck.

When I coded +NAUX I could see the new option in the stereo instantly, which was quite cool.

donpb

I believe an analysis of the charging system is performed before it decides to apply the change. I just let mine figure it out itself and it usually comes back 110ah.

Anthro

That is interesting. Mine was still saying 110ah and I would say much too soon for it to have done any analysis.

I am aware that coding this correctly is important. That said, I think it probably matters a lot more for AGM batteries than for flooded types, which is what I have.

I don't really see what the charging system could do that would kill a flooded cell by overcharging. I mean all it can really do is what "dumb" cars do, ie put something close to 14.5V through to the battery.

(To be clear, I will code it correctly, just saying I don't think it is as critical for flooded types as for AGMs!!)

Anthro

donpb

It takes a few cycles to perform the charging analysis. Most of what it actually does is a mystery. If your charging current is too high, nothing will happen to your battery within a few days. It usually takes a couple of years to eventually damage the cells. Most people just get a FREE new battery at that time because its still under warranty.