Hello - VW Fox 2007 Horn Failure - Assistance Needed ...

   #1  

chopper_harris

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Hello

A first post, from Standish near Preston in the UK.

I am seeking assistance with my 2007 VW Urban Fox - WVWZZZ5ZZ74026661

The front horn failed some time ago (located behind the front bumper) - the horn itself works OK with a 12v battery.
I assumed that it was the clock-spring, but replacing the original clock-spring wit a new one has not solved the problem.

The 2007 Fox does not appear to have a conventional fuse-relay configuration, and I believe that the horn is activated by one of the on-board modules ?

As a niche model, the Fox does not get as much coverage as it's larger bretheren, so I have been working on the assumption that it's related to a Polo 9Z.


I'm new to VCDS, and don't have much of a clue where to start diagnosing the fault.
Any useful assistance would be much appreciated.

Here is a full scan of the vehicle, produced an hour or so ago - no obvious faults ?



Code:
Saturday,17,August,2019,14:51:05:12784
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x86
VCDS Version: 19.6.1.0  HEX-V2 CB: 0.4508.4
Data version: 20190529 DS308.0
www.Ross-Tech.com


VIN: WVWZZZ5ZZ74026661   License Plate: MA03 GUY
Mileage: 77320km-48044mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 5Z (5Z - VW Fox (2004 >))
Scan: 01 03 08 09 15 17 19 44 46 56
 
VIN: WVWZZZ5ZZ74026661   Mileage: 77320km-48044miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: Redir Fail!
   Part No: 030 906 034 S
   Component:  MARELLI 4EV  MPSF  1605  
   Coding: 00031
   Shop #: WSC 00000  
   VCID: 1C6021C17FB8D8E7361-4B3C
   WVWZZZ5ZZ74026661     VWZ5Z0F7152332

No fault code found.
Readiness: 0110 0101

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 5Z0-907-379-ABS.clb
   Part No SW: 5Z0 907 379 A    HW: 5Z0 907 379 A
   Component: ABS 8.0 front   H01 0004  
   Revision: 00000000    Serial number: 00000000000000
   Coding: 0000010
   Shop #: WSC 00000 785 00200
   VCID: 43D2BABDA786C71F97B-50F4

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 6Qx-937-049-C.lbl
   Part No: 6Q1 937 049 D
   Component: 0000 BN-SG.         1S34  
   Coding: 24580
   Shop #: WSC 00000  
   VCID: 3C20C141DF78B8E7D61-50F4

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6Q0-909-605-VW5.lbl
   Part No: 1C0 909 605 K
   Component: 1M AIRBAG VW51      0009  
   Coding: 12621
   Shop #: WSC 00000  
   VCID: 2C00F1012F182867461-50F4

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 5Z0-920-xxx-V1.clb
   Part No: 5Z2 920 820 A
   Component: KOMBI+WEGFAHRS. M73 0013  
   Coding: 00442
   Shop #: WSC 00000  
   VCID: 372ADE6DE65E9BBF3B3-50F4
   WVWZZZ5ZZ74026661     VWZ5Z0F7152332

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
   Part No: 6N0 909 901 
   Component: 0000 GATEWAY CAN    1S34  
   Coding: 00014
   Shop #: WSC 00000  
   VCID: 70B82571C3B00C873A9-50F4

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 6Q0-423-156.clb
   Part No: 6Q0 423 156 AB
   Component: LenkhilfeTRW        V270  
   Coding: 10140
   Shop #: WSC 00000  
   VCID: 6FBA260DDE8E137F233-50F4

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: None
   Part No: 5Z0 959 433 J
   Component: MODULO CONFORTO H07 0009  
   Coding: 0014899
   Shop #: WSC 00000 785 00200
   VCID: 4ACC979980AC165754D-4B1E

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 1K0-035-1xx-56.lbl
   Part No SW: 5Z0 035 152     HW: 5Z0 035 152 
   Component: Radio BVX       006 0010  
   Revision: 00006000    Serial number: VWZ1Z5F4023125
   Coding: 0010200
   Shop #: WSC 00000 785 00200
   VCID: 6FBA260DDB8E137F233-50F4

No fault code found.

End----(Elapsed Time: 01:46, VBatt start/end: 12.1V/14.2V. VIgn 0.0V)------
Many thanks
 
Last edited:
   #2  

Uwe

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Since the the horn itself works, and the car doesn't know what the problem is (as evidenced by the lack of fault codes), then the next step is to get wiring diagrams and figure out what actually does switch the horn on and off.

-Uwe-
 
   #3  

chopper_harris

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I was expecting that I can view the horn press signal at the input to one of the modules, and to attempt to activate the horn via one of the control blocks.

Can anyone assist with the location of data blocks for the logic flow through the horn push through to the horn output, please.
 
   #4  

Uwe

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Try the CECM at address 09, MVB 004.3

-Uwe-
 
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