Coding e70 trailer hitch

[jwalker87]

Thanks for chiming in! I did install the AHM module, and it showed up in NCS when I went to code it, indicating it is connected properly. I don't have a trailer to test the lighting, but when I put it in reverse the "trailer hitch" view (or whatever it's called) is grayed out and I can't select it. Does this mean I did the coding wrong? I think it's weird that I coded "SL_BEI_KZL_AKTIV" in the AHM module from aktiv to nicht_aktiv, but I have no idea what that is ... maybe because I didn't use the "process car" function in NCS?

[Badsmerf]

I've never used the process car feature, just the process ECU. I coded each individually.

If I remember right... I had to add the trailer zoom feature after, but it was only changing a simple code I believe.

Did you follow my post and write the extra code in the FRM? I also had to write a bunch of code into in the AHM. Also, you leave "SL_BEI_KZL_AKTIV" alone, and just write nicht_aktiv.

[jwalker87]

I did the coding that I pasted into Post #8 here, which I got from your posts in the linked thread. The only deviations were the values that were already set to what you had listed. I did add the several entries to the AHM module, and changed the selection "SL_BEI_KZL_AKTIV" from aktiv to nicht_aktiv (as you said, the toggle, not the name itself).

Specifically, you discussed coding the following, which were already set that way on my car, so I did not make any changes to them:

HKL
SCH_FBD -> aktiv
SCH_TOEHKI -> aktiv
TASTER_FBD -> aktiv

FRM (these entries do not exist and must be written in)
LWR_STROM_HALT -> wert_01
LWR_STROM_NORMAL -> wert_01
LWR_STROM_RAMPE -> wert_01

AHM
LAENDERVARIANTE_AHM -> us


I'll go back and review your thread to see if there was any discussion on the zoom feature, but I do not recall any.

Thanks again!

[Badsmerf]

The trailer zoom code is the one you changed in the CIC. I'm not sure why it is grayed-out. Maybe check wiring and re-check the coding in each module? Hook-up to a trailer and see if everything else is working properly.

[jwalker87]

Strange. Unfortunately I don't have a trailer to test out, but I re-read all the modules and they have the correct coding. I also did a check of the wiring and did not find any smoking guns (or wires...).

[jwalker87]

Update: I'm an idiot! Or at least not as smart as idrive. I normally use the birds-eye-view mode of the backup camera, but I switched it to the normal-view today and BAM, hitch-zoom-view is available and working! Not sure why it depends on that since it's a completely separate menu option, but oh well.

I'll still try to find a trailer to verify light operation, but everything appears to be working well for now with the coding I've documented here.

[RhythmMachine]

Coming a bit late to the game on this one, but I'm looking at installing my hitch and AHM module while away from my coding laptop. Does anyone know if either of these options is feasible? I just need the vehicle to be driveable... I won't be hooking a trailer up until I've completed the coding.

1. Add the AHM module code in advance (before installing the hardware)
2. Drive with the AHM hardware component installed without doing any coding updates

[Attacking Mid]

I don't know if option 1 is doable or not. Option 2 should not cause any problems. Or if you really want to be certain, just leave the trailer module uninstalled until you're ready to code it. It is a simple install.

AM.

[RhythmMachine]

Originally Posted by Attacking Mid

I don't know if option 1 is doable or not. Option 2 should not cause any problems. Or if you really want to be certain, just leave the trailer module uninstalled until you're ready to code it. It is a simple install.

AM.

Thanks -just read a few posts of people reporting issues with their signal lights not working and it wasn't clear if it was due to errors in their wiring or not completing the coding part. I'd just rather not take the old coding laptop on vacation with me or drive from AZ back to Canada without signal lights!

Sounds like a reasonable course of action would be to do the full install, without coding, and see if the car works as expected. If not, then pull the AHM module which should hopefully get things back to normal where the car isn't surprised by having any hardware bits reporting back without being added to the VO.


EDIT: Update on this... I haven't done the coding yet (plan to do that today), but I installed the wiring harness and AHM hardware module without doing any coding changes and didn't have any issues at all with errors, lights not working, or things like that. It did throw some codes since I had to move the car partway through the work, so my rear lights and proximity sensor were unplugged, but those cleared easily and nothing else popped up.