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VCDS (aka Vagcom) For all your electronic debug / diag advice queries and mods.

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  #11  
Old 4th January 2021, 11:20 PM
paulrstaylor paulrstaylor is offline
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Well that will teach me to read and not just look at your sig pic! In that case you should have measured the pads and entered the thickness when you changed them

Could be you are within a tolerance, but probably worth running the adaption when you get vcds!

http://wiki.ross-tech.com/wiki/index..._Parking_Brake
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  #12  
Old 4th January 2021, 11:35 PM
S81 S81 is offline
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Thanks I'll check to see when it arrives
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Audi A8 d4 2014 phantom black 3.0 tdi

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  #13  
Old 5th January 2021, 08:38 AM
MikkiJayne MikkiJayne is offline
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The D3 definitely needs to know pad thickness as it uses that to calculate when the pads are worn down and hence control the light. If you change the pads without telling it the thickness of the new ones one of two things happens:

1, it still thinks it has old, worn pads and puts the warning light on before the new pads need it

2, it has no idea what pads it has so doesn't both with the warning light at all. The first sign you get of worn pads is it wearing through to the metal and destroying the discs! That is assuming, of course, that you rely on the warnings to tell you when the pads are worn.

It uses the servo in the motor to determine how much the piston moves by when it applies or releases the parking brake, but it doesn't know the absolute position of the piston, hence why you have to tell it the pad thickness so it can calculate the change from the piston movement.
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  #14  
Old 5th January 2021, 12:37 PM
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tc4332 tc4332 is offline
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Quote:
Originally Posted by MikkiJayne View Post
The D3 definitely needs to know pad thickness as it uses that to calculate when the pads are worn down and hence control the light. If you change the pads without telling it the thickness of the new ones one of two things happens:

1, it still thinks it has old, worn pads and puts the warning light on before the new pads need it

2, it has no idea what pads it has so doesn't both with the warning light at all. The first sign you get of worn pads is it wearing through to the metal and destroying the discs! That is assuming, of course, that you rely on the warnings to tell you when the pads are worn.

It uses the servo in the motor to determine how much the piston moves by when it applies or releases the parking brake, but it doesn't know the absolute position of the piston, hence why you have to tell it the pad thickness so it can calculate the change from the piston movement.

Is this a sign for the future?
Mikki knows something about D3's
Is there hope for the lesser ones amongst us?
If I don't fall of my perch could it be that my D4 could feel the touch of her gentle hands?
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2014 A8L D4 4.0TFSI Gold (Sticker says "Beige") Can't leave you in a black smoke cloud anymore..
In progress, Nothing left to do.



Gone 2004 A8 D3 3.0 TDI. Ebony Pearl Black (with little bits of other colours and glitter)
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  #15  
Old 5th January 2021, 01:37 PM
MikkiJayne MikkiJayne is offline
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Quote:
Originally Posted by tc4332 View Post
Is this a sign for the future?
Mikki knows something about D3's
Is there hope for the lesser ones amongst us?
If I don't fall of my perch could it be that my D4 could feel the touch of her gentle hands?
I know many things about D3s. These things are exactly why I only work on D2s
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  #16  
Old 5th January 2021, 02:53 PM
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David's8 David's8 is offline
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Quote:
Originally Posted by MikkiJayne View Post
I know many things about D3s. These things are exactly why I only work on D2s
Well, that put you straight Ray !
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  #17  
Old 6th January 2021, 06:23 PM
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tc4332 tc4332 is offline
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Originally Posted by David's8 View Post
Well, that put you straight Ray !

I am pleading Old Age, I didn't mean it Guv.
It was the Leprechauns that made me do it, honest.


My D4 passed it's MOT today. It had been delayed by 6 months due to Corona.
It came up with 14 days to oil change so that was done at the same time with a new filter. I can't complain, cost me £100. Parts only, no labour cost.
I am so lucky, the way I am looked after.
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2014 A8L D4 4.0TFSI Gold (Sticker says "Beige") Can't leave you in a black smoke cloud anymore..
In progress, Nothing left to do.



Gone 2004 A8 D3 3.0 TDI. Ebony Pearl Black (with little bits of other colours and glitter)
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  #18  
Old 6th January 2021, 08:47 PM
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David's8 David's8 is offline
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Ah, the "Big boys made me do it and then ran away" excuse.... or in your even less credible case, the small boys.

Good to hear you got the MoT though, Ray
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