error code from VAG COM. help?

[jedi-knight83 0]

Thanks very much to Kevheywire for helping me the VAG COM stuff

 

It picked up 1 fault on the ABS.

 

00279 differential lock valve 1

N125

35-00

 

Any ideas??

 

it had us both stumped!

[dr_mat 0]

Well diff lock is the VR6's simple traction control system. It applies the brakes to the spinning wheel. I'd guess this means one of the valves controlling that.

EDL - electronic differential lock

 

Very much a misnomer!!

[jedi-knight83 0]

Very much a misnomer!!

 

whats that mean?

 

how should i go about fixing this? i dont really want to go to VW

[stevemac 0]

Try doing a search on the ross tech website http://www.ross-tech.com/

 

They market the VAG-COM diagnostic equipment

[jedi-knight83 0]

it just tells me that the code can be looked up in the repair manual?

 

hmm looks like i'll have to call VW

[dr_mat 0]

"misnomer" - means it's a bad name for it. "Differential Lock" is rubbish, it doesn't lock the diff...

It's the traction control system, it's part of the same valve set as the ABS setup. My guess is the "EDL" valve is stuck or leaking.

Either way, the ABS circuit will have disabled that function, though I'd guess it doesn't stick the light on on the dash cos it's not a safety feature.

I would guess that it's likely to require a whole new ABS pump/valve set assembly, and those don't come cheap. For the sake of the pathetic traction control offered by this system, it's not worth investing time and money to fix it, is my opinion.

But the only people that would know for sure are those with Bentley...?

[stevemac 0]

But the only people that would know for sure are those with Bentley...?

 

I'll have a look - back in a mo !!

[jedi-knight83 0]

I would guess that it's likely to require a whole new ABS pump/valve set assembly, and those don't come cheap. For the sake of the pathetic traction control offered by this system, it's not worth investing time and money to fix it, is my opinion.

 

but if it gives an error the abs light comes on and doesnt that mean my abs is dissabled??? i dont want to drive without the abs really

 

I'll have a look - back in a mo !!

 

 

thank you stevemac,

[stevemac 0]

Output at printer VAG 1551 Possible cause of malfunction Correction

00279 1223

 

Differential Lock Valve 1 -N125

 

Faulty wiring, wiring connection or valve coil.

 

Remedy - Test wiring, wiring connections and valve coil:

 

That's all it says !!

[jedi-knight83 0]

ah well thats a damn sight better than

 

needs new abs pump thingy ma jig :lol:

 

thanks for that

[stevemac 0]

With a bit of luck you'll just find a rotten old wire that just needs replacing.

 

Sorry I can't be any more helpful. Most of the original VW documentation that I have relates to G60's only - no difflocks or traction control !!

[dr_mat 0]

If the ABS light is on, then the ABS isn't working, jedi-knight83. But I don't see why a fault in the EDL system would cause the ABS light to come on - since it's not directly required for ABS functionality...

[Kevin Bacon 5]

If the ABS light is on, then the ABS isn't working, jedi-knight83. But I don't see why a fault in the EDL system would cause the ABS light to come on - since it's not directly required for ABS functionality...

 

I think his ABS light has flickered on and off a few times recently but stays off the majority of the time.

 

I've not seen that code before, you usually either get pump outlet failures or faulty wheel sensors, not seen a Diff lock error before!

 

If it does come to a new pump, maybe one off a Ford Galaxy or Golf VR6 would be easier to find in the scrap yard?

 

Kev

[dr_mat 0]

Actually I've seen a fair few Corrado VR6 ABS pumps kicking around (on ebay). There's a lot of Corrados out there that have been written off, and since the majority of VR6s *don't* have failed ABS pumps they're not *that* tricky to come by. Not like door handles, fog lights and headlight switches!!!

[jedi-knight83 0]

ha, typical. the ABS light was on this morning.

[dr_mat 0]

Just like all good performers, a Corrado knows how to put on a performance *just* when it's needed!! :)

[jedi-knight83 0]

so would the traction control use a different sensor so the abs?? is that basicly what the problem is?

[dr_mat 0]

The traction control uses the *same* sensors as the ABS, but it will have a different control valve in the ABS control unit. The ABS brain watches the activity of the sensors (basically it constantly measure wheel speeds). ABS and EDL are both aspects of the same system.

 

If it detects that one front wheel is going faster than another, and the brakes are NOT being applied then it will APPLY the brakes to the faster wheel on the assumption that it's probably spinning.

 

If it detects that one front wheel is going faster than another while the brakes ARE being applied, then it will REDUCE braking force to the SLOWER wheel on the assumption that that wheel is about to lock.

 

So the ABS control unit has various valves to allow it to do the ABS function (i.e. reduce the braking force to a particular wheel), and various valves to allow it to do the EDL function (i.e. apply the brakes to a particular wheel). These valves are all controlled by the ABS computer, and all the phsyical valves will be in the main ABS control pump unit (the expensive bit).

 

It seems that as your ABS light is coming on, and the differential lock valve is the one that is being found to be faulty, the ABS controller decides that *any* failure in ANY of these valves is enough to disable the ABS function, aswell as the EDL function.

 

So no, not different sensors, just different control valves in the ABS pump unit. (Is the short answer.)

[jedi-knight83 0]

:? bu99er (as the wise toyota owning australian said)

[dr_mat 0]

And lo and behold, an ABS pump appears:

 

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... egory=9889

 

Could be worth a shufty, jedi-knight83.

[vr6corrado 0]

The ABS light has never worked on my C but I think the ABS is working because the pedal 'pulses' just after i switch it on. Hopefully it's just the bulb? Anyone know how to get to it?

[jedi-knight83 0]

And lo and behold, an ABS pump appears:

 

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... egory=9889

 

Could be worth a shufty, jedi-knight83.

 

Hmm, i take it that would be a hell of alot cheaper than a brand new one? is it something i could fit or should i get a garage to do it??

 

thanks for keeping an eye open anyway!! much apreciation

[dr_mat 0]

Brand new one is about £700, or so I'm told!!

My personal feeling is get a pro to fit it. It's a safety system, after all...

All depends how handy you are with a spanner, really.

[jedi-knight83 0]

just phoned the vw specialist in cambs called cowley rd garage, (not the stealer) and they said the error from vag com wont mean anything to them, they will need to take £40 +vat off me to out it through their own diagnostics..... then they can go from there!!!

 

how do i go about checking the sensors myself?

[dr_mat 0]

The error code you had indicated that you needed to check the electrical circuit to the abs valve mechanism, so it's really just a case of taking the big connecting plug off, trying to find any dodgy contacts and putting it back. There may be other things you can do, but I'm not aware of them..

Testing the sensors will likely not help, as the ECU seems to think they are all fine.