ABS pump wiring

[Isthatacaddy?]

Good evening all, I have an ABS light illuminated and my MOT is due soon. Using OBDeleven I get the following code: 01276 intermittent.[/img]
I have disconnected the plug and would like to at least do some basic checks in there to at least see if I am getting any power in there and maybe check grounds etc. Is anyone familiar with the wiring on this model, who can offer any guidance on where I can test and what voltage values I could expect to see on some of the conductors/colours?

It’s a 2009 1.9tdi lbs if that makes any difference. I have taken a couple of photos, hopefully they may be of some help.

Much appreciated
https://www.dropbox.com/scl/fi/4zpzv5lb ... m845u&dl=0
https://www.dropbox.com/scl/fi/q7qhf69a ... eixey&dl=0

[Isthatacaddy?]

Good evening all, I have an ABS light illuminated and my MOT is due soon. Using OBDeleven I get the following code: 01276 intermittent.[/img]
I have disconnected the plug and would like to at least do some basic checks in there to at least see if I am getting any power in there and maybe check grounds etc. Is anyone familiar with the wiring on this model, who can offer any guidance on where I can test and what voltage values I could expect to see on some of the conductors/colours?

It’s a 2009 1.9tdi lbs if that makes any difference. I have taken a couple of photos, hopefully they may be of some help.

Much appreciated
https://www.dropbox.com/scl/fi/4zpzv5lb ... m845u&dl=0
https://www.dropbox.com/scl/fi/q7qhf69a ... eixey&dl=0
https://www.dropbox.com/scl/fi/82wxqnji ... i0xm0&dl=0

[STP]

Have you checked the wiring at the abs wheel sensors themselves? That's a more likely area for a faulty wire or corrosion.

You can get a copy of Erwin off eBay, it has the diagrams for all systems and models.

[petrev]

Couldn't see any ErWin copies on eBay ?
Found a couple of ElsaWin copies via Google !

I just did a trip to Barcelona and on the way down to Plymouth I chanced upon heavy rain and some large standing water areas on the M4 !

Started getting ABS issues not long after the puddle

Fault started as one wheel randomly applying ABS for about a second.
Then in Spain it gradually got worse with full Christmas tree light effects and bongs and dings, and eventually RED Light Consult Garage Immediately !!! No Speedo, no ACC, no Front Assist, no TPMS, Front radar detached, etc. then occasionally on startup no throttle - All in all not great !

Managed to get home.

Checked the ABS controller plug and the cowl had broken into pieces and some parts were missing - not as water resistant as it should have been.

Made up a new Delphi 38pin plug and wired it as per ErWin.
Got a local expert to splice it into the loom - Still a fault with the RHS speed sensor so replaced both Left and Right with new Hella units from GSF.

Cleared all the faults (26) and so far so good fingers crossed.

Before -

After -

[Pradcad]

@petrev Where did you get your elsawin copy please? Cheers mate- Erwin is going to closed for public access tomorrow

[petrev]

Links change all the time ...

This one maybe
https://tools4car.co.uk/product/elsawin6-0/

There was a German one, but I don't see it now ?

There are many hits on AliX
e.g.
https://www.aliexpress.com/item/1005007880334075.html

I got my PDFs from ErWin a while ago ... Get in before closure if possible !

Good luck

[Isthatacaddy?]

So I have recently acquired VCDS and this is what it is coming up with.

https://www.dropbox.com/scl/fi/q6gk71p0 ... 2mswj&dl=0

[Isthatacaddy?]

https://www.dropbox.com/scl/fi/q6gk71p0 ... 2hnxk&dl=0

[Isthatacaddy?]

https://www.dropbox.com/scl/fi/81gjar95 ... 11yoc&dl=0

[STP]

Intermittent could be a pointer to a wiring issue, corroded pin on a plug or a bad sensor connection. Unfortunately you would still need to be able to do some electrical and function testing. Use the output functions to test-run the pump etc and inspect plugs and fuses for corrosion or damage.

From Ross-Tech wiki:

01276 - ABS Hydraulic Pump (V64): Implausible Signal
Possible Symptoms
Malfunction Indicator Light (MIL) ON
Possible Causes
Fuse(s) faulty
Wiring and/or Connector(s) from/to ABS Hydraulic Pump (V64) faulty
ABS Hydraulic Pump (V64) faulty
Brake Electronics Control Module (J104) faulty
Special Notes
When found in the VW Golf/Jetta/Bora (1J/9M) platform, check the fuse panel on top of the battery for damage.

[Isthatacaddy?]

No problem , cheers for the response. I have scoured the internet continuously and have seen similar lists of possible issues. I need to have a good play around with VCDS and should hopefully get to the bottom of it.
I don’t just want to replace the pump as knowing my luck, the fault will still be there. I think I have the pump that is not a common failure item but I may be wrong.

[STP]

It's worth using the output tests to run the abs pump and if it runs continuously without any trips or stopping then it's probably fine, but could be a command wire if it "won't run" intermittently, if it runs then stops intermittently while running, it's likely the pump motor itself.

To try and differentiate between a bad pump or the actual control wiring to it.

If you command it to run and it doesn't do it sometimes, it's he control wiring, if it always starts but doesn't keep running sometimes, it's likely the pump.

First easy check, identify the fuses and pull them, check for corrosion on the tabs.

[Isthatacaddy?]

I tried to do an output test on the abs pump. Clicked on select, selected 03-ABS Brakes, then selected output tests -03 abs brakes. I seen a message to press brake pedal and It showed: Requirements for output test not met

[Isthatacaddy?]

I tried to do an output test on the abs pump. Clicked on select, selected 03-ABS Brakes, then selected output tests -03 abs brakes. I seen a message to press brake pedal and It showed: Requirements for output test not met

This was with just the ignition on though, I didn’t have the engine running so not sure if I was doing it right. All of my fuses seem In order,

[Isthatacaddy?]

This was with just the ignition on though, I didn’t have the engine running so not sure if I was doing it right. All of my fuses seem In order,

Just had a thought. Maybe I should have cleared the fault code first before trying to perform the test. I will have another go tomorrow, when I have some daylight.