Keine Kommunikation mit der Lenksäulenelektronik | Posts 16+

Good evening
That's exactly the point; actually, everything I have on the steering wheel is activated, as long as it's not hidden behind abbreviations.
There is no lane departure warning system or steering wheel heater.

Can anything also be overly activated, which blocks everything?

What if I deactivated everything I didn't need regarding MFL?
Can coding also cause physical damage?

Greetings, mcaudi

Hello, my experience is that the information in the programs regarding what is coded and what is actually installed and functioning in the vehicle, does not always match 100%.
With my T6, if I were to simply follow the instructions and code everything accordingly, a number of things would definitely no longer work.

Therefore, the starting point is always the functioning configuration/coding of the vehicle manufacturer. This is to ensure security, therefore, ideally, a vehicle scan should be performed when a vehicle is first obtained.

From there, one can continue to proceed. Furthermore, it's not the case that simply because someone has marked a checkbox in a particular diagnostic tool, the software/hardware of the corresponding control device must necessarily support that specific function or configuration combination.

This as background information.

mcaudi wrote:

I tried encoding the new component again before, but the errors reappear, but the MFL and horn are not working.

That's strange. I would like to continue thinking from here.
Options:
- This encoding isn't the one used by MFL/Hupe.
- Another component prevents correct function (loose connection, coil spring broken again, ...)
- After the recoding, an error occurred somewhere that now prevents the horn and MFL from functioning.

Troubleshooting from my perspective: Make sure that the steering wheel ECU (not to be confused with the steering column ECU) can be accessed. Does it appear as a subsystem in the car scan? Otherwise, check the steering rack, etc. Can I query individual keys?

The coding differences are quite minimal:
Byte 00, Bit 5: Activation switch for driver assistance systems: yes/no
Byte 01, Bit 3 Push to Talk Taste yes/no
Byte 02, Bit 1, Parking Light Function (Falling Edge/Normal)
Byte 02, Bit 7 ACC yes/no
Byte 04, Bit 0 S-contact yes/no
Byte 04, Bit 1, Remote Light (falling edge/normal)
For the horn, all of this should be irrelevant.
Nevertheless, I would first ensure that everything is coded to the final state with the horn functioning (i.e., to the delivery state of the new STG) and then verify that the communication between the steering wheel STG and the steering column STG is functioning. I suspect there is a disruption in the LIN communication.

Since everything else has already been replaced, I would focus on the steering wheel electronics (the small circuit board hasn't been replaced yet) and the coil spring (damaged again?).

Greetings
Guste

Good evening
Thank you for the additional tips and ideas.
I will only have it available for further "testing" over the weekend.

Today, I expanded my fleet with a new Eos 2.0 TDI. This will eventually replace my Passat CC, as my girlfriend wants to buy her own car again.

Good evening everyone, mcaudi