How to fix the 6N2 ABS Signal Outside Specifications Fault

Post Instructions on DIY modifications here - use all information with caution!
User avatar
alexperkins
Site Admin
Posts: 14775
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 67 Q7
Location: Poole, Dorset, UK.
Contact:

How to fix the 6N2 ABS Signal Outside Specifications Fault

Post by alexperkins »

Disclaimer - I do not take responsibility for any damage, injury, death or incidents that take place when you are following this guide. It is up to you whether you decide to go ahead.

Should you not feel confident doing this, I can provide a postal repair service - please contact me for details

Credit for parts of this guide go to members of UK-Polos.net :)

Many of the 6N2s are starting to exhibit ABS pump failure (or so it would seem)

When scanned, it will come up with this error:

01276 - ABS Hydraulic Pump (V64)
16-00 - Signal Outside Specifications

VW want £735 for a new one, but thankfully its a reasonably simple fix providing you are handy with a soldering iron, have a bit of patience and a steady hand

You will need:

A dremel or a hacksaw
Silicone sealant or similar
Self-Amalgamating tape (recommended, but not compulsory)
A Torx E5 socket bit - this is vital you get the right size
Soldering iron and solder

First and foremost, disconnect the Negative battery terminal

Start by removing the ABS module from the ABS pump.

Image

Unplug the ABS loom by pulling the end up and lifting it away (youll see when you do it). Also ensure you disconnect the short ABS pump plug.

Continue by removing the 4 Torx E5 screws very carefully as they arent particularly strong headed, and pull the control module very gently away from the pump

You should now have the control module free to do as you wish with!

Proceed to cut very carefully around the seam that you can see between the top and bottom covers. You only need to go down about 2mm through the plastic - its not very thick and the circuit board is just inside the case therefore MAKE SURE you do not insert anything into the case when you are trying to lever the lid off, you WILL destroy the circuit board!

You should now see this -

Image

In the top left corner is the connector for the ABS pump motor. It is driven by two transistors on two seperate circuits.

Between the two connectors for the pump motor is a simple sensor circuit, if there is no motor plugged in (IE open circuit) this circuit feeds back into the EEPROM IC in the centre of the board and presumably tells the system to shut down and give a fault code as shown above.

You should see this -
Image

Where the two motor pins connect to the board, the solder joint overheats, and cracks creating a 'dry' joint, thus causing the issue you are experiencing.

Apply a good amount of solder to the two joints and make sure you amply heat the existing solder so you get a good solid joint.

When you are happy its complete, take the top cover and carefully apply a bead of silicone around the lip and push the two parts of the case together. Apply another bead of silicone around the join once finished and smooth in with your finger. For added waterproofing, use a length of self amalgamating tape and wrap it around the module covering the join (it bonds to itself providing you stretch it to half its original width)

Refit to the car in reverse order making sure you do not over tighten the bolts, rescan the ABS pump, clear the fault code and it shouldn't come back

Verify it is working by running Output Tests and checking you can hear the pump actuate.

Problem solved :D
User avatar
Endi_GTI
Gold Member
Posts: 940
Joined: Fri Oct 22, 2010 8:00 pm
Location: Plymouth, UK, Drives Polo 6N2 GTI

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by Endi_GTI »

I did this a couple of months ago and can fully vouch that it works if you get this fault code. Mine has been fine ever since 8)
User avatar
alexperkins
Site Admin
Posts: 14775
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 67 Q7
Location: Poole, Dorset, UK.
Contact:

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by alexperkins »

I did it a few weeks ago, and it too fixed the problem perfectly

Whoever said replacement is the way forward can jump haha
User avatar
hallie123
Getting There!
Posts: 53
Joined: Sun May 05, 2013 11:42 pm

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by hallie123 »

This has happened to mine! hopefuly this will solve it, thanks for the how to

probably a stupid question but do i need to bleed the brakes before doing this?
User avatar
alexperkins
Site Admin
Posts: 14775
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 67 Q7
Location: Poole, Dorset, UK.
Contact:

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by alexperkins »

No

This doesn't touch the hydraulics of the brake system
User avatar
hallie123
Getting There!
Posts: 53
Joined: Sun May 05, 2013 11:42 pm

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by hallie123 »

Ahh cool thanks,

il let you know how it goes!
User avatar
hallie123
Getting There!
Posts: 53
Joined: Sun May 05, 2013 11:42 pm

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by hallie123 »

Done this yesterday, fairly easy job, seems to have worked! thanks for the 'how to' and saving me £735!!!
clubdubpolo
New
Posts: 17
Joined: Thu Jul 12, 2012 10:11 pm

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by clubdubpolo »

Did this repair yesterday, and indeed the solder had cracked.
Abs light went out as soon as i connected the pump back up.

Only issue was the E5 torx bit, couldn't find one anywhere local, so i used a 4m all drive spline socket, fitted like a glove.
starkey
New
Posts: 1
Joined: Sun Feb 09, 2014 12:07 am

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by starkey »

Got this code come up on mine after replacing the sensors. Not to keen on trying this myself.. you say you do a postal repair service, I'm fairly local to you if you'd repair it if I brought my car to you?

Would be appreciated if you could give me a PM with prices etc, cheers.
User avatar
alexperkins
Site Admin
Posts: 14775
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 67 Q7
Location: Poole, Dorset, UK.
Contact:

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by alexperkins »

Hi Mate - Ill PM you my email

You won't be able to PM me back, so drop me an email reply

Cheers
grangeway
New
Posts: 4
Joined: Wed Feb 25, 2015 4:59 pm
Drives: Polo GTI 6n2 X reg

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by grangeway »

Is there anyone in/near South-east London who could help me do this? I'm getting this code, and I don't have the skills to do it. I'd be happy to pay someone for their time. I would also be happy travel quite far... Getting desperate..

Alternatively, does anyone know a garage in London/Surrey/Kent who would do it? my local garage said wont.

Thanks
User avatar
alexperkins
Site Admin
Posts: 14775
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 67 Q7
Location: Poole, Dorset, UK.
Contact:

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by alexperkins »

If your capable of removing the control module, you can post it down to me and Ill fix it and send it back for a fee?

Otherwise, I'm in Poole.
don carlos
New
Posts: 21
Joined: Sat Sep 26, 2015 7:46 pm
Drives: vw polo 2000 3d hatchback

Re: How to fix the 6N2 ABS Signal Outside Specifications Fau

Post by don carlos »

Wow thanks a lot man I owe u this was one of the most successful fix with proper played out detail thanks a million as this really worked out for me now my dash is clean no lights but I have one more issue, when I run the vcds I'm getting a immobilizer error code but my engine doesn't shut off like what I read in other post but I wonder if in the future it's gona be a problem, also there's a second one saying temp signal is too low

Thanks again for the abs fix
User avatar
alexperkins
Site Admin
Posts: 14775
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 67 Q7
Location: Poole, Dorset, UK.
Contact:

Re: How to fix the 6N2 ABS Signal Outside Specifications Fault

Post by alexperkins »

You are welcome
dantheram
Gold Member
Posts: 505
Joined: Mon Oct 22, 2007 8:18 pm

Re: How to fix the 6N2 ABS Signal Outside Specifications Fault

Post by dantheram »

Is it ok to drive the car with the module off?
Post Reply