2006 A6 2.4 Avant - Parking Brake Malfunction

[AndreSilva]

Hello my friends.

It has been a few months already, my parking break stopped working and I receive a "Parking Brake Malfunction" every time I start the car.
I did a scan with Carista and got this 2 errors:

ABS
Part #: 4F0910517K
Coding: 4946 (decimal)
Component: ESP 8.0 front
Fault codes:
00473 Control Module for Electric Park- / Hand Brake (J540)

Parking brake
Part #: 4F0910801A
Coding: 2031 (decimal)
Component: EPB CA3C0040
Fault codes:
02443 Control head

I read that in some cases it was only a bad wire, that it was easy cleaned/replaced, do you think this might be the case or as the diagnosis says, it is really the control module ? How can I be sure ?
Does the other error(02443 Control head) will be fixed as I fix the first one ?

If I decide to change the module, I found some used ones here in Europe for around 60 euros, like this one, is it ok to put a used one ? Does anyone know where is it located ?
https://www.ebay.co.uk/itm/Steuerger...sAAOSw3K1azhYF

Cheers!

[Grigor@Bestiale]

The details are not enough to see what exactly is the problem, it’d be very helpful if you scan the car with VCDS/ ODIS/equivalent and get the details for each code (eg short to plus/etc). If not you can use the wiring diagram and indeed check the connections, but you’ll still be guessing what you’re looking for.


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[AndreSilva]

Apparently the module stays in the back, near the toolbox an jack, but I couldn't remove the toolbox, is there any catch ?
Is the module that black one in the back ?

[AndreSilva]

OK, I guess this is good news.
When I tried to get to the module(and couldn't get) and just touched some wires and it worked again for 2 days.... then it stopped working, so I think it is some faulty wire indeed.
This weekend I`ll dismount everything and see which wire is the problem. Looks promissing :D

[Grigor@Bestiale]

There you go :-)


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