QuilloMan Posted February 17, 2008 Report Share Posted February 17, 2008 Hi, I own an 8L S3, and I'm pretty sure my haldex is not working, I can spin easely on first gear. VAG-COM returns no errors. What can be wrong? Thanks in advance. QuilloMan. Link to comment Share on other sites More sharing options...
kite Posted February 17, 2008 Report Share Posted February 17, 2008 Is your hand brake on, if the hanbrake is up one notch and the "park" light is on the dash, this will diengage the haldex Link to comment Share on other sites More sharing options...
QuilloMan Posted February 17, 2008 Author Report Share Posted February 17, 2008 No, hand brake signal is working correctly. Link to comment Share on other sites More sharing options...
shark_90 Posted February 17, 2008 Report Share Posted February 17, 2008 It is worth just putting the handbrake on the first notch to prove that the Haldex is not working properly to see if it is any worse. I'm sure a Haldex fault would bring the ESP light on permanently. Link to comment Share on other sites More sharing options...
QuilloMan Posted February 17, 2008 Author Report Share Posted February 17, 2008 [ QUOTE ] It is worth just putting the handbrake on the first notch to prove that the Haldex is not working properly to see if it is any worse. I'm sure a Haldex fault would bring the ESP light on permanently. [/ QUOTE ] I have tested that (handbrake on / handnbrake off) and can't feel any diference. Link to comment Share on other sites More sharing options...
davidhodgkinson Posted February 18, 2008 Report Share Posted February 18, 2008 [ QUOTE ] Hi, I own an 8L S3, and I'm pretty sure my haldex is not working, I can spin easely on first gear. VAG-COM returns no errors. What can be wrong? Thanks in advance. QuilloMan. [/ QUOTE ] Do you get a response from the Haldex controller? If not, maybe someone has removed the fuse so the car wont throw an error on VAGCOM autoscan Link to comment Share on other sites More sharing options...
Mo-S3 Posted February 18, 2008 Report Share Posted February 18, 2008 Are you sure the propshaft is still there? some one might have taken it off and forgot to to put it back in. No seriously; when you did a scan on the vag com you should see the haldex controller. Did you/they? Link to comment Share on other sites More sharing options...
QuilloMan Posted February 18, 2008 Author Report Share Posted February 18, 2008 Thanks for responses. I can read haldex controller with vag com and returns no errors. I can also read ABS controller and also no errors. Link to comment Share on other sites More sharing options...
Mo-S3 Posted February 18, 2008 Report Share Posted February 18, 2008 Are you using a shareware vag com program or a fully licensed one? Might be worth booking it into your local audi for a diagnostic. At least they should be able to tell you what is wrong. Link to comment Share on other sites More sharing options...
QuilloMan Posted February 18, 2008 Author Report Share Posted February 18, 2008 I'm using the full licensed version. Also I have taken the car to my local garage (non audi) and they tested it with a MagnetyMarelly device and found no error. I was there and he test every actuator on haldex and ABS. I tend to think this is not an electronics problem. I have read somewhere that rear differential can cause this problem. Could it be the rear differential or even the haldex cluth discs? P.D. I change haldex oil and filter every 30000Km (20000miles). Link to comment Share on other sites More sharing options...
kite Posted February 18, 2008 Report Share Posted February 18, 2008 I had the diff fail in a TT, it gave a mechanical fault when scanned with VagCom. Link to comment Share on other sites More sharing options...
QuilloMan Posted February 18, 2008 Author Report Share Posted February 18, 2008 Thanks for the info. So we can discard the differential. Link to comment Share on other sites More sharing options...
kite Posted February 18, 2008 Report Share Posted February 18, 2008 The haldex and diff are in one unit, if the diff is OK but the haldex clutch has gone your gonna need a new one, the haldex is not a servicable unit, you can only change the oil and filter which you have already done. Are you sure you have a quattro and not a FWD 150 or 180 Link to comment Share on other sites More sharing options...
PetrolDave Posted February 18, 2008 Report Share Posted February 18, 2008 [ QUOTE ] Are you sure you have a quattro and not a FWD 150 or 180 [/ QUOTE ] In the first post he says he's got an 8L S3 - and they were only made in "Haldex quattro" form, either 210 or 225 bhp. Link to comment Share on other sites More sharing options...
Paul Posted February 18, 2008 Report Share Posted February 18, 2008 Do you have access to a 4 post lift. I would be easy to lift up the car, leaving the wheels free, and see if they all rotate when the engine is turned on and put into gear. 4 wheel drive should engage almost immediately, as it would detect the front wheels spinning, and the rears not, engaging haldex to correct it. Link to comment Share on other sites More sharing options...
QuilloMan Posted February 18, 2008 Author Report Share Posted February 18, 2008 Thanks for all the responses. I can give a try to your idea Paul-S3, although I'm quite sure it is not working. Do you think it can be the haldex clutch? I bought the car with 45000 milles and I'm not sure the previous owner made the haldex maintenace properly (not shown on maintenance book) and I made the first service to haldex with 56000 milles. Haldex has been working until now (75000 milles). Link to comment Share on other sites More sharing options...
kite Posted February 18, 2008 Report Share Posted February 18, 2008 [ QUOTE ] [ QUOTE ] Are you sure you have a quattro and not a FWD 150 or 180 [/ QUOTE ] In the first post he says he's got an 8L S3 - and they were only made in "Haldex quattro" form, either 210 or 225 bhp. [/ QUOTE ]Doh Link to comment Share on other sites More sharing options...
Paul Posted February 18, 2008 Report Share Posted February 18, 2008 [ QUOTE ] Thanks for all the responses. I can give a try to your idea Paul-S3, although I'm quite sure it is not working. Do you think it can be the haldex clutch? I bought the car with 45000 milles and I'm not sure the previous owner made the haldex maintenace properly (not shown on maintenance book) and I made the first service to haldex with 56000 milles. Haldex has been working until now (75000 milles). [/ QUOTE ] Its hard to tell as usually if they fail, they throw an error, which is picked up on diagnostics. Servicing for the haldex has always been an extra to the usual car servicing. It is advised to service as such.. 20K miles oil 40k miles oil and filter 60K miles oil 80k miles oil and filter and so on. So at worst, if it was never serviced, its missed 2 oil changes and 1 filter. If this is the case it may well have caused some problems? Here is how the haldex works. Haldex website Link to comment Share on other sites More sharing options...
Mo-S3 Posted February 18, 2008 Report Share Posted February 18, 2008 Even missing the service intervals on them should not be detrimental to its life span. Some thing must have helped its failure somewhere down the line. Previous owner doing a lot of hand brake turns maybe? Link to comment Share on other sites More sharing options...
S3_Scot Posted February 19, 2008 Report Share Posted February 19, 2008 See if the fuse has gone. You won't get an error code if it has but haldex will not work. Fuse box is on driver's side between the door & side of dashboard & can be accessed by gently using a screwdriver to ply it off. There is then a fuse map to send u to the haldex fuse. Link to comment Share on other sites More sharing options...
QuilloMan Posted February 19, 2008 Author Report Share Posted February 19, 2008 I have checked fuses, driver's side and top of batery, and are ok. Link to comment Share on other sites More sharing options...
QuilloMan Posted February 26, 2008 Author Report Share Posted February 26, 2008 I have taken the car to Audi, they think the problem is in the Haldex electric pump. I will have you updated. Link to comment Share on other sites More sharing options...
JamboV6 Posted March 4, 2008 Report Share Posted March 4, 2008 Hi New to this forum but a regular on UK-MKIVS.NET Ive got the same problem with my Golf V6 4Motion, infact have for about 3yrs now and still havent got the bottom of it. Its had a whole new Haldexcoupling/diff assey, new controller, new brake and handbrake switch, oil and filter change. No fault codes! will be interested to see what Audi say, Keep us all posted. Oh here is the link to my forum thread about it, if anyone want a read. http://uk-mkivs.net/forums/1/1198830/ShowThread.aspx Cheers James Link to comment Share on other sites More sharing options...
QuilloMan Posted March 6, 2008 Author Report Share Posted March 6, 2008 Well, a week later I have recovered my loved S3. It seems that some part was not in stock and so the long wait. In fact the problem was in the electric precharge pump on the haldex. As I tell you in the first post it shows no error on vag-com. For those that doubt about 4WD or Haldex, after 2 month without I can say it makes a BIG BIG difference. Link to comment Share on other sites More sharing options...
Paul Posted March 7, 2008 Report Share Posted March 7, 2008 Glad to hear its fixed! Link to comment Share on other sites More sharing options...
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