Coding e70 trailer hitch

[jwalker87]

Hello all! I just picked up a 2011 x5 35d a few months ago, and am loving it so far. I installed the factory trailer hitch and wiring harness, and now I'm on to coding. I found several threads and comments throughout the internet, but none really summarized everything neatly into a "this is everything you need to do to code for trailer hitch installation." The closest was probably THIS thread, starting on Post #55.

Anyhow, I compiled the attached directions as best I understand them. Can anyone that has done this coding verify the correctness/completeness of this?

Thank you in advance!

[Clavurion]

Assuming we are talking about manually detachable towbar.

AHMU ANH_KUPPLUNG_US //Retrofitting Towbar with removeable ball head for US

With NCS add +AHMU to FA list. Save the new FA on both FRM and CAS. Then code all modules (does it according to new FA list).

[jwalker87]

Thank you for the response! The first part (adding +AHMU) checks with what I've seen, and I suppose the second part (code all modules...) as well, but the coding specifics are unclear. Your wording appears to insinuate that there is a "new FA list" that could be referenced for this?

[Clavurion]

When you add that new option to FA list NCS will do the basic coding (SG_CODIEREN) based on this new FA list and change the parameter values accordingly. Depending on NCS version you can do all modules at once "Code Car" or those modules mentioned in PDF (modules which have parameters with different value with this option) individually "Process ECU".

[jwalker87]

So if I use the below-linked instructions on how to use NCS to update the FA list, that will be all? (file is too large to upload on this forum)

https://www.xbimmers.com/forums/atta...3&d=1587485402

[Clavurion]

Originally Posted by jwalker87

So if I use the below-linked instructions on how to use NCS to update the FA list, that will be all? (file is too large to upload on this forum)

https://www.xbimmers.com/forums/atta...3&d=1587485402

That instruction is just the first part, updating the FA list. After that you do the actual coding to modules so parameter values are changed according to this new FA. On that instruction's NCS version it's the "Process Car" which will code all modules when Job is "SG_CODIEREN".

[jwalker87]

Ok, I think I understand, I've just never used the "Process car" function of NCS before. Will it only update module coding to support the VO change selected, or will it write over everything? It seems like this would be an automated method to avoid me having to make all the individual coding changes unlisted in the first PDF. Can't find much info on the function via searching.

[jwalker87]

Just got done coding - we'll see how it goes. I did the VO add, and then just coded the modules individually since I'm a bit uncomfortable with the 'write vehicle' option. Ended up making the following changes; the others identified in my PDF were already at that setting.

KOMBI Module:
AHM_APPL_MONITOR - from nicht_aktiv to aktiv

RPDC Module:
ANHAENGERKUPPLUNG - from nicht_aktiv to aktiv
AHK_OFFSET - from offset_0 to offset_1
AHK_AUSBLENDUNG - from nicht_aktiv to aktiv

CIC Module:
MACRO_TRAILER_COUPLING - from nicht_aktiv to aktiv

AHM Module:
CCMELDUNG_ABRISS_AHV - created entry and set to cc_04bh
CCMELDUNG_FEHLER_AHM - created entry and set to cc_04bh
CCMELDUNG_VERRIEGEL_AHV - created entry and set to cc_04bh
START_CCM - created entry and set to klemme_15
TYP_AHV_SG - created entry and set to keine_ahv
SL_BEI_KZL_AKTIV - from aktiv to nicht_aktiv

[Clavurion]

Process car would have done all those changes according to FA. Coding with NCS is not updating any softwares. It's only changing parameter values one way or the other. Of course you can get to the same goal via different routes. If you change the parameter values manually there would actually be no need to change FA. FA itself doesn't do anything it's just like instructions on how NCS default codes any module. Though if not altering the FA coding would change back if for example you take the vehicle to dealer for software updates.

[Badsmerf]

Do you have the AHM module installed? I haven't done any coding on mine since I got everything working, but if you have issues I might be able to help. In that thread I listed everything I had to code to make it work. It even tells me when I have a trailer light out.

I guess I did add the wiring for the brake controller last summer. No need to code anything, just run wires to the front. Worked perfectly.