DSC

[Tom Holland]

 

[Mint]

...Sorry to sound a complete numpty but the DSC is the cylinder and black box? The ASC is the wet part the pump?...

Neither Tom. The system early cars had was ASC (Automatic Stability Control) and later cars have DSC (Dynamic Stability Control). Your car will have one or the other.

 

[Tom Holland]

Neither Tom. The system early cars had was ASC (Automatic Stability Control) and later cars have DSC (Dynamic Stability Control). Your car will have one or the other.

Thank you you can see I'm not so good at this

 

[mrscalex]

I think things have got quite confused here. @Mint has explained ASC v DSC. I did try to explain this myself earlier in the thread but obviously misfired.

Based on the position of the unit that is ASC not DSC. If it was the later/more complex DSC it would be on the left as you look into the engine bay. Unless there are some alternative builds but I've seen a good few Z3s and never noticed it.

Whether it's ASC or DSC. There is a wet part - the pump - the pipework goes into it. And a dry part - the module - the bit that usually fails.

I'll take a photo of each installation so it's clear to you. The good news is ASC is simpler/more of a known commodity to sort out.

Out of interest, what does the button on the centre console say? It will say ASC or DSC accordingly. It turns off the traction control.

 

[mrscalex]

ASC. Centre of first photo and closeup.

 

[mrscalex]

DSC

 

[mrscalex]

I said I’d check how easy it is to get to the DSC compared to the ASC. Not easy by the looks of it. Good job it’s a lot more reliable and you appear to have ASC anyway.

Make sure you match the part numbers for a replacement module.

 

[Mario]

Guys guys guys - we are all getting confused there are TWO versions of the DSC on the Z3's early DSC cars come with the module on the left hand side of the car whereas the later version of the DSC equipped cars come with the unit on the other side of the engine bay, but they are both DSC. This is all down to a later development where they integrated some sort of pre-charge pressure pump on the unit whereas the older units had that pump as a separate item or something along those lines.

BTW my 3.0 is a DSC car and it has the pump on the same side as Tom's

Maybe the ASC equipped cars also have the unit on the same side of the early DSC ones, I am not familiar with those.

 

[mrscalex]

Guys guys guys - we are all getting confused there are TWO versions of the DSC on the Z3's early DSC cars come with the module on the left hand side of the car whereas the later version of the DSC equipped cars come with the unit on the other side of the engine bay, but they are both DSC. This is all down to a later development where they integrated some sort of pre-charge pressure pump on the unit whereas the older units had that pump as a separate item or something along those lines.

BTW my 3.0 is a DSC car and it has the pump on the same side as Tom's

Maybe the ASC equipped cars also have the unit on the same side of the early DSC ones, I am not familiar with those.

Indeed. That's why I said perhaps there are some alternative builds. And to check the centre console button.

 

[Tom Holland]

Well this is all very interesting, I have taken some photos. My car is also the 3.0 and its DSC "nearside" the photos of the unit I bought from a breakers are the same numbers. Donor car I'm told was 3 series. I follow you with the pump wet side. So the black box or the cylinder is the most likely fault or its the new yaw sencor or its the rotation sencor. Next to the yaw in the last image.

 

[mrscalex]

If it’s like other versions I’m more familiar with it will be a plastic module held on with 4 bolts. That’s the part that nearly always fails when there’s an issue with the pump.

Can’t diagnose anything without error codes. Can only give general guidance. No idea if it’s the module or a sensor.

This is why @Nodzed suggested a visit down south.

 

[Tom Holland]

Thank you Mario, yes I agree. See if @colb and Nodzed can hook it up and take the guessing out of it. Thanks again Mrscalex much appreciated everyone's involvement.

 

[Mario]

I think my money is on the sensors for sure. they are either bad or they need to be initialised.

 

[Tom Holland]

Hello Mario, that's the trouble, was my original sencor bad or was it the DSC or is the new bad or all bad or all good and the rotation sencor. It's a laugh!

 

[mrscalex]

Hello Mario, that's the trouble, was my original sencor bad or was it the DSC or is the new bad or all bad or all good and the rotation sencor. It's a laugh!

That's what error codes are for You'll soon get used to us lot saying read off the errors before plotting any further

This sort of thing will take you a long way (C110+ Creator)

C110 Scanner Airbag ABS Engine Diagnostic Fault Code Scan Tool Reader OBD2 Suitable For BMW Cars: Amazon.co.uk: Car & Motorbike

Buy C110 Scanner Airbag ABS Engine Diagnostic Fault Code Scan Tool Reader OBD2 Suitable For BMW Cars at Amazon UK. Free delivery on eligible orders.

www.amazon.co.uk

Not everyone wants to get into that though I know. But whoever repairs it won't get far without one.

 

[Tom Holland]

That's what error codes are for You'll soon get used to us lot saying read off the errors before plotting any further

This sort of thing will take you a long way (C110+ Creator)

C110 Scanner Airbag ABS Engine Diagnostic Fault Code Scan Tool Reader OBD2 Suitable For BMW Cars: Amazon.co.uk: Car & Motorbike

Buy C110 Scanner Airbag ABS Engine Diagnostic Fault Code Scan Tool Reader OBD2 Suitable For BMW Cars at Amazon UK. Free delivery on eligible orders.

www.amazon.co.uk

Not everyone wants to get into that though I know. But whoever repairs it won't get far without one.

Thanks for the link, unfortunately I got the round type. This is the codes from the auto electrician. He then said I have checked the wiring OK, think it's the Abs. So here we are. I'm sure the guys will sort it out. The previous owner was quite insistent the car was made in Germany! Is that possible?

 

[mrscalex]

The C110, in fact every reader, uses a £5 adapter to fit into the round connector.

All Z3s made in US.

Helpful to have BMW codes. Those are generic OBD from a genetic reader there. But might be useful.

 

[Tom Holland]

Thanks for that, I will definitely get one and an adapter. So the bmw codes will appear on this reader?

 

[mrscalex]

Thanks for that, I will definitely get one and an adapter. So the bmw codes will appear on this reader?

Yes. As long as you buy the BMW version. I think it may be available for other cars too.

 

[Ianmc]

No ASC or DSC on early Z3s - I like that!!