Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
Martin wrote:
What fault codes were showing up relating to the EPB - what makes you think it is 12V supply related rather than switch wiring related?
Hi Martin..
There could be a couple of faults, but Mike mentioned the 12v supply and to check that there was 12v getting to the control module. I don't have the fouled codes as they were on Mike's iPad when he came up.
....D3 with lots of d4 extras!
26th Feb 2016 1:27 pm
Gmcc
Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
Martin wrote:
I think the "left most 3" is a typo, it should be left most 4.
These are just the switch contact wires, not the 12V supply to the EPB module.
The ground connections (2 off), ignition signal, key in signal, CAN bus connections (4 off: 1 pair in, 1 pair out) do go through that black connector.
The main 12V supply connections (2 off) are separate and not through this connector, please fill in your D3 profile here as the connector moved between model years.
Ok great, thanks, and profile updated, it's a 2005 manual, and I think GS although robbo770 changed it a wee bit. Lol!D3 with lots of d4 extras!
26th Feb 2016 1:30 pm
Gmcc
Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
HughMartin wrote:
I had a similar problem with my D3. Disco Mickey checked voltages at the connector in the front nearside wheel arch and the plug at the EPB module and found a voltage drop indicating a high resistance somewhere. He very quickly narrowed it down to a corroded wire splice in the loom just forward of the suspension pump. Fixed in 15 minutes.
Here's hoping mine is something similar! D3 with lots of d4 extras!
26th Feb 2016 1:31 pm
Gmcc
Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
Ign...red
Key in...light green/white LGW?
Cambus..4 off, YB and YN, 2 in, 2 out. (Not sure what the B and N are, Brown or black, N?)
So I could check the continuity of the red and LGW pins for continuity...
And the 12v feed???D3 with lots of d4 extras!
26th Feb 2016 1:39 pm
HughMartin
Member Since: 30 Mar 2008
Location: Aberdeenshire
Posts: 751
HughMartin wrote:
I had a similar problem with my D3. Disco Mickey checked voltages at the connector in the front nearside wheel arch and the plug at the EPB module and found a voltage drop indicating a high resistance somewhere. He very quickly narrowed it down to a corroded wire splice in the loom just forward of the suspension pump. Fixed in 15 minutes.
I should have mentioned, the voltage drop was tiny; if I remember correctly, it was a fraction of a volt. I wouldn't have thought anything of it but it was enough for DM to hone into the fault.
26th Feb 2016 2:07 pm
Gmcc
Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
Martin wrote:
mx468, I'll share what we PMd about earlier in the week.
~~~~
I had an intermittent EPB switch and flashing lights and I found that the chassis connectors were the problem as I could temporarily fix the problem by giving the wires going into the connectors a wiggle...
So I cut the EPB switch wires from each side of the connector and soldered a new piece of cable to join each back together, totally bypassing the connector.
It was probably only one intermittent wire but whilst I was there I just replaced all 4!
The connector of interest is the black one in your pictures.
The wires are coloured and located:
RED pin 13
YELLOW pin 14
YELLOW with GREEN stripe pin 15
YELLOW with BLUE stripe pin 16
Click image to enlarge
Looking at the photo above, these are on the top row, inset ones with the red seals, left most 3 of those
Finally getting time to have another look at this...
I've tested continuity on the first inset red wire and its fine (got a beep on my multi meter's continuity setting) the other inset wires... there are, from left to right, another red, then..solid yellow, yellow/green, yellow/blue. No of these have continuity, should they?
I'm going to put the car up on the ramp now and see if i can get access to the module itself and test for continuity of the 12v supply to it, No idea what wire this may be? And will try and find the connection under the front wheel arch that my model year should have (MY 05)
Any help or pointers welcome!!
Got the car up on the ramp now and I'm looking for the 12v supply to the module and I don't know where I should be looking?
I've looked and seen this random plug not attached to anything, blue bits on it?.... Any ideas? It's sitting on the offside of the module... Is this also where the 12v supply is attached to the module? I can see a plug that looks like it is swivels on a white bit to come apart...
Click image to enlarge
Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated D3 with lots of d4 extras!
3rd Mar 2016 3:53 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18452
Continuity to and from where?06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
3rd Mar 2016 5:35 pm
Gmcc
Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
Continuity at the red wire going forward to the switch i'm assuming? not sure what wire the first inset red wire is, but when checking it, with one lead on the pin and the other lead on the metal chassis i get a beep.
This shows that the wire is intact to the switch yes? if indeed this wire goes to the switch?D3 with lots of d4 extras!
3rd Mar 2016 5:46 pm
Gmcc
Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
Anyone? D3 with lots of d4 extras!
4th Mar 2016 8:29 am
Gmcc
Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
All fixed!!!
Not by me though! Disco Mikey came to the rescue, and guess what....he had it fixed in about half an hour!! He unplugged the 12v supply at the module, which is the plug on the drivers side of the module. It has a wee indent that has to be pressed before you can move the white clip, and thus the plug out of the socket. He tested for voltage there, two wires/pins yellow/blue and yellow/green I think they were. Anyway, one had about 10v and the other nothing! He then went and found the join/splice of said two wires, which was near half way between the front and back wheels on the nearside, and yeah they are joined there. This join was completely corroded! Joint fixed, and EPB fixed!!! Job done!
Happy days, thanks Mike! D3 with lots of d4 extras!
5th Mar 2016 5:14 am
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20731
Member Since: 12 Mar 2015
Location: Aberdeenshire
Posts: 153
Aha, you got a photo of the offending item! Cheers Mike! D3 with lots of d4 extras!
6th Mar 2016 6:25 am
FAT MATT
Member Since: 18 Nov 2015
Location: West Yorkshire
Posts: 35
Fixed my epb last weekend. Got under the rear of the car, opened the connectors, cleaned and greased then put back together.
No problem since so connector it was.
12th Jun 2016 6:46 pm
Ali1971
Member Since: 13 Jun 2016
Location: Dalgety Bay
Posts: 817
Thread resurrection. Been searching through the forum and found this which interests me greatly as I have the same thing happening on my D4! Will try all that’s been mentioned first .
10th Feb 2019 6:25 pm
AL_P
Member Since: 17 Feb 2017
Location: London
Posts: 161
Sorry for the hijack/resurrection
Was the corroded join inside the car or outside underneath?
Just trying to locate it to solve an issue with my EPB which is causing an engine system fault
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