Haldex Pump

[Mh96]

Alright, here we go…

 

 2.0 TDI 170 4x4, 64 plate

 

Yeti is throwing an intermittent C111204 code (Haldex clutch pump) - was tipped off by spinning front wheels a bit if I stomp it and the roads anything other than bone dry. Had another 4x4 Yeti before this (written off in a police RTC) and a 4x4 octy vRS (sold) before that and both had the rear wheels kick in before my fronts started spinning.

 

Tried to run a pump relearn, it refused to even start so I drained it, removed the pump and cleaned it up. Was only serviced back in Feb of this year so really wasn’t much at all on it. Plugged it up to 12v on the bench and it came to life? Refilled with new fluid, new O-rings and plugged it all back in. Successfully ran a relearn and then gave it some acceleration with the handbrake slightly engaged (while it was still in the air) and the back wheels fought the handbrake and span.

 

Had 36h of lovely AWD goodness, felt like a different car, and then pulling out of a junction Sunday morning the front wheels went, traction control kicked in and I’ve checked and the code is back.

 

Working theory in my head is that I resuscitated a dying pump by plugging it directly into power, squeezed what life it had left and then it’s died. Then again, could also just be chatting out my arse!

 

Any ideas folks? Bit thrown off by the pump springing back to life after servicing it as I was expecting it to be dead. Thinking replace the pump and see where we end up, but figured it was worth asking thoughts before I fork out

[Trevor M]

If you have VCDS you can try running the pump with 'Output Tests' to see if it runs. If it fails, I understand a sharp tap sometines allows the brushes to re-make contact with the comutator; this is a common problem, which some say can be caused by a restricted filter making the pump work too hard.

I had this problem a few years ago and replaced the pump, but there may be kits to enable a repair to be undertaken at lower expense.

I used haldexrepairs.co.uk for my replacement pump and found them very helpful (I have no association with them other than having bought from them in the past.)

Good luck with it,  trevorm

[Mh96]

2 hours ago, Trevor M said:

If you have VCDS you can try running the pump with 'Output Tests' to see if it runs. If it fails, I understand a sharp tap sometines allows the brushes to re-make contact with the comutator; this is a common problem, which some say can be caused by a restricted filter making the pump work too hard.

I had this problem a few years ago and replaced the pump, but there may be kits to enable a repair to be undertaken at lower expense.

I used haldexrepairs.co.uk for my replacement pump and found them very helpful (I have no association with them other than having bought from them in the past.)

Good luck with it,  trevorm

Had a skim through some of their documentation, didn’t come up when I googled the code because they spaced it C1112 04. Looks like I’m on the hook for a new pump and a repaired control unit!