Haldex doesn't seem to be engaging on my 2011 skoda yeti. Video is off car in off road mode with tcs disengaged. I'd imagine I should be getting some more movement out of the rear wheels if it was functioning?

Don't seem to be able to embed videos and files too large but the links hopefully work.

 

 

https://i.imgur.com/pqO0QuG.mp4

https://i.imgur.com/bJegKpt.mp4

 

?

When did it last work and when was it last properly serviced, oil changed and filter / pump clean up?

 

Possibly the corrosion of the electrics which is covered on here quite a bit.   

7 hours ago, feirmeoir said:

Haldex doesn't seem to be engaging on my 2011 skoda yeti. Video is off car in off road mode with tcs disengaged. I'd imagine I should be getting some more movement out of the rear wheels if it was functioning?

Don't seem to be able to embed videos and files too large but the links hopefully work.

 

 

https://i.imgur.com/pqO0QuG.mp4

https://i.imgur.com/bJegKpt.mp4

 

There was mention some while back (I think it was @J.R.) when it was pointed out that the Haldex system is only triggered when the OFFside front wheel loses traction, as opposed to a full 4WD system where all wheels are active all the time the system is engaged.

 

Correction: OFFside front wheel (in the UK), not nearside.

 

Edited 17 March, 20242 yr by MikeTheThinker
Correction

5 minutes ago, Rooted said:

?

When did it last work and when was it last properly serviced, oil changed and filter / pump clean up?

 

Possibly the corrosion of the electrics which is covered on here quite a bit.   

 

I can't exactly say for sure but I would have thought up until relatively recently. It almost certainly did at some stage of ownership in the past 18 months. It had a main dealer haldex service about 9000km ago at 138,000km but they mightn't even check it's functioning just replace oil and filter and away with it

 

It has had a full main dealer service history but some of it is in french and cant see any obvious mention of a haldex service... surely a main dealer wouldnt miss that.

 

Thanks, I'll look into that.

5 minutes ago, MikeTheThinker said:

There was mention some while back (I think it was @J.R.) when it was pointed out that the Haldex system is only triggered when the nearside front wheel loses traction, as opposed to a full 4WD system where all wheels are active all the time the system is engaged.

 

 

thanks, the front right wheel was definitely spinning based on the slap of muck I got sticking my head out the window!!

35 minutes ago, feirmeoir said:

Haldex doesn't seem to be engaging on my 2011 skoda yeti. Video is off car in off road mode with tcs disengaged. I'd imagine I should be getting some more movement out of the rear wheels if it was functioning?

Don't seem to be able to embed videos and files too large but the links hopefully work.

 

 

https://i.imgur.com/pqO0QuG.mp4

https://i.imgur.com/bJegKpt.mp4

 

Were the front wheels spinning while the video was taken?

Edited 17 March, 20242 yr by Warrior193
answer crossed in post

Just now, Warrior193 said:

Were the front wheels spinning while the video was taken?

 yes both front wheels were in muck and spinning, off road engaged and tcs off: doing 2000-2500 rpm. Back wheels were on a more gravely mucky roadway. Video doesn't show it well but it was done on an incline onto a wet muddy field from a gravel roadway so i'd be able to reverse out of it.

If those videos showed what the front wheels were doing they would be more useful.

The Haldex will only engage (subject to a few other points which are not relevant atm) when slip is sensed in either of the front wheels. The ORB does NOT turn it on; it is on all the time just not engaged. And as soon as you reduce power it dis-engages.

 

Get a fault code read done. Common failure is the pump reporting back as failed but a new pump often does not work because the ECU is water damaged. Getting a Gen 4 ECU off is often a sketch as the lower M4 screw rots in the case and easily snaps off flush. Getting the broken piece out is very tricky as there is no inline access so I get a specialist to come out and remove it. We always fit a new pump anyway and replace the filter (which VAG refuse to admit is there). The important point is to throughly blow the system out with brake cleaner and compressed air as it gets full of disgusting goo.

 

 

Sounding like a main dealer job to get to the bottom of it... is there an earth to check on the yeti? I can see there are on other haldex cars but nothing specific to the yeti.

Best go to someplace that knows what they are doing and that charges a fair hourly rate. 

Got an obdeleven scanner to take a look. Fault code coming up is 00448 Haldex clutch pump "lower limit not reached" which I'm guessing is the same as "lower limit exceeded" which there is more info available online. 

I'm planning on buying this kit and replacing pump with oil and filter. https://www.haldexrepairs.co.uk/shop/repair-and-service-kits/gen-4-vw-audi-seat-skoda-haldex-pump-kit-0ay598549a/

Edited 17 June, 20241 yr by feirmeoir

Could it be just a blocked filter not allowing the pump to come up to operating pressure I doubt if the previous service would have even checked that, most don't even know there's a filter in there.?
A lot cheaper to change than the pump.

8 hours ago, Urrell said:

Could it be just a blocked filter not allowing the pump to come up to operating pressure I doubt if the previous service would have even checked that, most don't even know there's a filter in there.?
A lot cheaper to change than the pump.

 

It would be very disappointing yet highly likely if that was the case, given it was a main dealer service. 

I was assuming that if it was blocked at this stage the pump has likely been goosed from the blockage? probably worth doing as you said first though.

pump running every 43 seconds rather every 20 as you'd expect

Went ahead and changed the pump, filter and oil. Small amount of build up around the mesh at the bottom. Filter was dirty but didn’t appear completely clogged.

Seems to be working normally now anyway and error codes no longer showing.

Got the pump off haldexparts.com. I’d advise anyone doing it to get a kit for refilling as it’s a messy job the oil tends to drip out as you’re filling unless your filling pipe is tight to the reservoir.