How to fix the 6N2 ABS Signal Outside Specifications Fault
Posted: Fri Feb 08, 2013 10:12 am
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.
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 -
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 -
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
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.
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 -
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 -
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