Having all this expertise here, I've gained some valuable experience...
I'm experiencing a problem where the tachometer on my Passat CR fluctuates when I'm driving at a constant speed. This applies regardless of whether the cruise control is active or you are manually controlling the gas pedal â and it is speed-independent.
Usually, it's sinusoidal, meaning I'm usually maintaining a constant speed of 100, and the speedometer fluctuates between 100 and 103. Occasionally, there are also minor tremors, however, I don't usually observe them often, as I generally pay attention to traffic...
On the internet, I found a similar problem in the Scirocco forum, unfortunately without a solution other than "isso".
I pointed out the error to VW, and they replaced the KI with a different one (I don't know if that's true, but it's mentioned in the DISS), and the error was reproducible.
Now I've read that the sensors should be located in the gearbox: is it worth replacing it? Do you perhaps have any more ideas about what I could try?
Videos where you can tell what I mean:
Edit Admin: The attachment function is designed to be used.
A very Merry Christmas, thank you very much, and best wishes,
Marco
Last edited on 26-12-2011, 19:37, edited 3 times in total.
It would surprise me if the sensor was located in the gearbox, as all reasonably current models generate the signal based on the wheel speed sensors of the ABS/ESP.
Thank you for the videos/the scan! Don't worry, the server won't be "filled up" like this, but the files embedded in the topic will ensure that it's still recognizable even in a year.
Because, in the past, it has unfortunately been shown that files linked to from external sources, for example, on file-sharing platforms or elsewhere, tend to disappear over time.
As a result, one obtains a text related to images/videos or logs that are no longer available. -> Unfortunately, this is useless. Therefore, it's better like this.
Unfortunately, I don't really have any ideas for creating a "cursor wiggling" effect, as this is a new effect for me.
Anyway, provided the road is not a wave road.
Why don't you check the vehicle speed, you can also compare the speed in the engine control unit (data block 6) and the speed in the data blocks of the instrument cluster.
If the values are not fluctuating, it must inevitably be due to the software of the instrument panel (update planned?).
Thank you for the answers, I also searched in the Passat forum, but I didn't find the information until I saw your hint...
Following procedure: My Passat went to VW Hamburg and was inspected there. According to the employee, no software update was made, as there was no update available (because they would always update the software first in such cases).
The car then went to a dealership in Gifhorn without further repair (as the dealer intended), and they re-entered the problem in the DISS - but did not further investigate it: not even a "Ba not traceable" like with the other things they didn't want to see.
On the invoice, it states: "Combination instrument checked" and "Combination instrument - cross-swap". Yesterday, I called the dealership again to inquire: Just now, I received a notification that they were unable to identify the issue, and if the problem reappears, I would have to bring the car back in. (Interestingly, during the repair, the service technician called me and said, "they would need to reconsider the KI" - so it was very clearly understood...)
Clearly, I am unable to reach a resolution through warranty, as the (dealer specified by the seller) generally finds very few defects*.
Are there any other approaches to solving this problem? I have read that there are different manufacturers of tachometers - does this also apply to the white one?
Ideally, I would of course have the 3c8 TFT-KI, but then my steering wheel would no longer function... Therefore, there is no option (especially since I can no longer see the point in constantly pouring more and more money into the car until it functions properly...).
Thank you and best regards,
Marco
* Another thread: Auxiliary heater - The battery at the rear is completely dead -> no warranty, as it is a wear and tear part and the battery functions according to its capacity. If it's only 6 minutes, that's bad luck...
Understanding the complaint is simple enough: activate the digital speedometer and display it. Then, while the needle is shaking, maintain a stable speed (if possible, using cruise control) and record a video (using a phone or camera, etc.). This will then clearly demonstrate the situation. In case of doubt, contact the TSC or, alternatively, take a test drive together with the customer service representative.
I cannot understand the statement about the update. As far as I know, there are no updates for these switchboard components, and SW 0110 is currently not available. The supplier is always Siemend/VDO in the 3C, identifiable by the abbreviation VDD in the extended identification and also in this case in the ASAM dataset.
I had a phone call today with VW in Wolfsburg regarding all my problems.
Regarding the speedometer issue, we have concluded that I will escalate the matter to VW Hamburg, meaning that they will, in turn, contact TSC*. But things will only start happening in the new year - I will get in touch if I have any news.
Thank you all for the feedback!
Best regards,
Marco
* for those of us who aren't so tech-savvy: Technical Service Center - is a facility located in Wolfsburg, to which VW workshops can turn to solve "difficult" problems
On my Passat, the speedometer needle also wobbles.
I also have the white AI.
I don't mind it too much (after all, I'm only driving at speeds between 70-90 Km/h occasionally).
Your experience has shown that you can also be let down by the friendly company...
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I can add a scan if needed.
