The horn is non-functional.

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allcarsnew007
Senior
Posts: 89
Joined: Wed Jan 08, 2020 4:10 pm

Greetings. In the present day, I have seen a malfunction in the functionality of my vehicle's horn. The ECU was subjected to a diagnostic scan using the Foxwell VAG Scanner, which detected a persistent fault (00576 - Terminal 15 008 - Implausible Signal - Intermittent). Despite examining the fuses, no apparent issues were seen. Does anybody possess knowledge about the optimal location to commence excavation? How can one determine the underlying cause of the issue?
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matthewlightburn
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Joined: Wed Nov 20, 2019 11:45 pm

Do the remaining steering wheel controls function properly?
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allcarsnew007
Senior
Posts: 89
Joined: Wed Jan 08, 2020 4:10 pm

All other components are functioning properly, with the exception of the horn.
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matthewlightburn
Moderator
Posts: 101
Joined: Wed Nov 20, 2019 11:45 pm

It is possible that a defective slip ring may be the cause, however I lack the expertise to identify it beyond a complete failure resulting in the loss of all wheel controls.
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allcarsnew007
Senior
Posts: 89
Joined: Wed Jan 08, 2020 4:10 pm

Upon reconnecting the VAG COM, I proceeded to assess the functionality of the horn inside the diagnostic module. It was successfully activated via the VAG COM, leading me to infer that there may be an issue with the steering wheel components. I want to dismantle the wheel tomorrow. Could you kindly provide me with guidance about the specific aspects I should pay attention to throughout the disassembly process?
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allcarsnew007
Senior
Posts: 89
Joined: Wed Jan 08, 2020 4:10 pm

I dismantled the airbag apparatus, inspected the wiring, and saw that all components seemed to be in satisfactory condition. The functionality of Relay seems to be satisfactory, as shown by the audible click that is produced when the horn is engaged via the use of VAG COM. Has anybody else had a similar issue?
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craigstomer
Senior
Posts: 59
Joined: Tue Sep 27, 2022 2:20 pm

I am experiencing the same issue. How was the issue resolved? In the VCDS software, where specific location did you go to in order to do a horn test? I am unable to locate it.
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Hunger_for_love
Senior
Posts: 75
Joined: Tue Mar 10, 2020 8:44 pm

I am encountering a same problem with my 2007 Audi A5 vehicle. I am uncertain about the appropriate course of action to undertake. The arrival of mot is imminent.
I am disinclined to see an amiable motor vehicle inspector just due to a malfunctioning horn.
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RuthHimmic
Senior
Posts: 80
Joined: Tue Apr 12, 2022 11:10 am

The horn of my 2018 RS5 cat is not functioning properly. However, when I activate the horn via the onboard diagnostic system (ODS), it operates well.
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