No communication with the steering column electronics

Hi

First of all, at the moment I'm still using a carport, because my VCDS hardware is still in the mail, otherwise I would of course use VCDS. The car must also be taken to the MOT.

Vehicle: Passat CC, Model Year 2011, MK:CFGB

Problem: No communication with the steering column electronics.

Completed repair: Coil spring replaced.
First, replace the entire part with 5K0 953 569 AS, which should be compatible with 5K0 953 569 T.
MFL and Hupe were working, but there were numerous error messages, so the old code was entered. All error messages are gone, but MFL and Hupe are now without function.
Wound coil installed in the old component (it's a makeshift solution but it works) nevertheless, no change.

The Passat was previously at the workshop for a routine inspection, but they shouldn't have been working on the folding strut, but they were, and now either the interior light comes on through the door, or it doesn't.
However, due to a few other incidents, trust in the workshop has been completely lost, and I also expect them to try to find a way out of the situation.

Code inherited from the old control unit's steering column electronics:
29:9a:a7:00:00

I suspect something is wrong.

Greetings to mcaudi

Hello,

My condolences, I suspect that there was some kind of improper wiring or that cables/connectors were damaged. The issue with the interior lighting (Do you mean turn on the light inside when the door is opened?) should actually have nothing to do with it, except that someone has been messing around with the wiring harness to the main control unit...

"It's best to start by posting an auto scan once the VCDS is available."

Best regards, Rainer

Thank you for the response.
I can also provide the Carport report.
The only option is to use the new component.

I'm slowly sitting on hot coals, and a VW repair shop nearby, but they also didn't help me.
Since being there, I didn't meet the right person, I called, then sent the problem via email but didn't receive a response. Was wasn't the garage where he used to be.

Greetings, mcaudi

Hi,
my questions for understanding:
- The car was at the workshop for the TÜV (German technical inspection) preparation, and work was being done on the steering column electronics (specifically, the spiral spring). Which problem / error entry was the cause?
- danach, the interior lighting worked intermittently, otherwise no other errors?
- Did you then replace the steering column electronics module yourself?
- Where did the information come from that the STG ******AS is compatible with the *****T ?
- Did you note down the error messages after the swap? They would be important - it needs to be recalibrated and re-programmed.
- What does the installation manual (RLF) say about the replacement, specifically about the calibration?
hg
Herbert

Hi Herbert

-Arbag failure, Acc failure, and nothing worked on the MFL except the steering wheel lever. The mechanic told me they could ignore my request, but they at least removed the steering wheel and connected the diagnostic tool.
Actually, it was important for me to control where I wouldn't be able to access it without the stage.

- Yes, but there was still no reliable tester.

-ECU replaced, steering angle sensor calibrated, and the old code was transferred to ensure that MFL also functions.
Bug report before coding.

-Unfortunately, no service manuals are available. I am using the book "now I help myself" and researching online.

- Steuergeräte: According to online and on-site replacement part sellers (excluding VW), the devices are compatible.

Sorry, I just sent this message in a hurry because I have to go to work.

LG mcaudi

There are essentially three things involved in this:
A) Steering column control unit
B) Coiled spring
C) Steering Wheel Control + Buttons

B) Winding spring C) Steering wheel can be ruled out, as the horn and MFL (multifunction display) functioned after a complete replacement of A+B.

A) The steering column STG is clearly also functioning correctly, as it performed both the supported function and the function without any error messages.

Therefore, I agree that the problem must lie in the coding.

"You have already posted the old code here. According to my understanding, there was no horn and MFL function on either of the steering columns. This suggests that the coding was likely incorrect from the beginning, and possibly nothing was actually defective. Unfortunately, I don't have any overview of what the individual coding bits mean without my VCDS device connected." Therefore, you will likely need to wait until the VCDS arrives.

Or you re-enter the original encoding of the new STG and compare the differences bit by bit. Then you could try changing the bits individually and see if you can find a working configuration that way.

Greetings
Guste

Good evening

I still have both code sets. Unfortunately, I only realized yesterday that I should also enter the "new" code set from AS again, but I didn't have time.
But I wasn't aware that I still had the encoding from AS.
Just got back from work, I have the day off tomorrow, so I'll get to it then.
And sorry, the software thing isn't really my area of expertise, I'm more of a hands-on type, maybe I should try reactivating one of the 20V models, after all, they're also fully electronic.

The cable behind the airbag is also new, and it no longer locks properly in the steering wheel.

Greetings to mcaudi

PS: I feel really at home here, the atmosphere is just like in the local forum, and the communication is also great.

Quote:

...-Arbagfehler, Accfehler, and nothing at all worked on the MFL except the steering wheel lever. The mechanic told me they could ignore my request, but they at least removed the steering wheel and connected the diagnostic tool. Actually, it was important for me to control where I wouldn't be able to get on without the stage. "

"
And how did this happen? Just like that, overnight? Tell me the backstory.
hg
Herbert

Good evening

The accident happened suddenly. My girlfriend drove through a gap in the road at high speed, hitting the steering wheel very hard, which caused a collision. She is a careful driver, but it seems she didn't see the {OBJECT}.

The shock cord is directly at the outer end and, as far as I've seen online, this is the typical location.

Greetings, mcaudi

mcaudi wrote:

But, sorry, the software thing isn't really my area of expertise, I'm more of a hands-on type.

No problem. We can certainly help with that.

mcaudi wrote:

I still have both encodings

Then, please place them both here. Then we can at least see which bits are different and perhaps give you further tips on which combinations you should try.

Actually, the "control arm" should not be additionally loaded at the end of the steering system, regardless of whether it's on the left or right side. There needs to be enough reserve.
Either it was wear and tear that coincidentally appeared due to contact with the pothole, or the steering system was not properly assembled, so that the spring was also overstressed even at a certain point, or the spring was already worn out.
The cause is unclear to me. The garage probably couldn't allow the car to leave the premises due to the safety issues, which is why the repair was necessary. To be handled only by qualified personnel... The internet is not a basis.
hg
Herbert

Hi
The hardware has arrived, and I'm also getting VCDS up and running, but I still need some time to get familiar with it.

I tried the encoding of the new component again beforehand, but errors are appearing again, but the MFL and horn are not working.

Anbei die Screenshots von beiden Codierungen.

Greetings, MCAudi

Herbert wrote:

In principle, the "steering column spring" should not be subjected to additional stress at the steering column's end, regardless of whether it's on the left or right side. There needs to be enough reserve. Either it was wear and tear that coincidentally appeared due to contact with the pothole, or the steering system was not properly assembled, so that the spring was also overstressed even at a certain point, or the spring was already worn out. The cause is unclear to me. The garage probably couldn't allow the car to leave the premises due to the safety issues, which is why the repair was necessary. To be handled only by qualified personnel... The internet is not a basis. hg Herbert

Hi

The steering wheel had not been removed before the failure of the suspension spring.
"Only one of the axles has been adjusted, but actually only at the rear axle, as the new bearings were installed there."

What the garage was allowed or not allowed to do regarding the car (even though they were not allowed to keep the car), is a different matter and doesn't help me with my problem.
I am aware of the dangers involved in working on cars, but I know firsthand what goes on in workshops, and we are all not perfect.

Greetings, MCAudi

Regarding the screenshots: It is clear that only VW can code this, and the LIN 2.0 also likely applies to this model year.
Next step - STG offers coding for various multifunction steering wheels. Which one did you install specifically? PR Numbers?
hg
Herbert

Hi
PR Number is 1xy
Leather sports multifunction steering wheel with tiptronic.

I am currently having issues with VCDS on the tablet. Everything is very small, meaning there is no full-screen view.
So, don't be a man, and read the instructions

Greetings, mcaudi

Unfortunately, the PR number alone is not enough.
What other functions are available on the steering wheel besides the Tiptronik? Especially those shown in the code list.
hg
Herbert