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Discussion Starter · #1 ·
Have been trying to read the fault codes in my TT, earlier today for some unknown reason the Emission control warning light came on and stays on in the dash.

However vagcom (which has previously worked absolutely fine) will not connect and the self test shows the message "Failed self test! K1: OK K2: Short to +12"

Anyone got any idea what's up, it has worked fine previously :?
 

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Discussion Starter · #5 ·
Yeah I suppose I have to rule out a problem with the lead, I have a mate with a Golf I will try it on that.

My main concern is that whatever has caused the warning light to come on this afternoon is also responsible for the error with trying to connect Vagcom. If that's the case would that mean the dealer's diag machine would also have a problem or do they work differently to the ross tech lead?
 
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powerplay said:
Yeah I suppose I have to rule out a problem with the lead, I have a mate with a Golf I will try it on that.

My main concern is that whatever has caused the warning light to come on this afternoon is also responsible for the error with trying to connect Vagcom. If that's the case would that mean the dealer's diag machine would also have a problem or do they work differently to the ross tech lead?
i was told by a local indy that audi don't recognise vcds and they use vas,as it works differently don't know if this true but the indy used a vas machine on mine, although i said he could use my vcds.
 

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tter said:
i was told by a local indy that audi don't recognise vcds and they use vas,as it works differently don't know if this true but the indy used a vas machine on mine, although i said he could use my vcds.
VAS is the genuine VAG computer diagnostic system - it's about £15,000 to get the machine and then on top of that you have to pay annual subscriptions to VAG for access to their big central database. All official VAG dealers have to have at least one. It's directly linked to the big database and it knows all the "passwords" to talk to your car's ECU, Dashpod etc. so it can program keys and decode HiFi equipment without any human intervention. It's very clever and very useful if you have access to one.

VCDS is third-party software originally written by a German technician living in America called Uwe Ross (RossTech). It was originally called VAG-Com but VAG objected so it was retitled VAG Computer Diagnostic System (VCDS). It's potentially even more clever than VAS because, without using any VAG software at all, RossTech have managed to make a system with 90% of the functionality for about £250 a licence.
 
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wja96 said:
tter said:
i was told by a local indy that audi don't recognise vcds and they use vas,as it works differently don't know if this true but the indy used a vas machine on mine, although i said he could use my vcds.
VAS is the genuine VAG computer diagnostic system - it's about £15,000 to get the machine and then on top of that you have to pay annual subscriptions to VAG for access to their big central database. All official VAG dealers have to have at least one. It's directly linked to the big database and it knows all the "passwords" to talk to your car's ECU, Dashpod etc. so it can program keys and decode HiFi equipment without any human intervention. It's very clever and very useful if you have access to one.

VCDS is third-party software originally written by a German technician living in America called Uwe Ross (RossTech). It was originally called VAG-Com but VAG objected so it was retitled VAG Computer Diagnostic System (VCDS). It's potentially even more clever than VAS because, without using any VAG software at all, RossTech have managed to make a system with 90% of the functionality for about £250 a licence.
yes indeed but there is some modules that VCDS still can't talk to without the passwords which audi seem to install on some of their newer cars e.g the ABS module.maybe they're getting wise to the cheaper version of the diagnostic tools and ensuring the only way to get things done is to goto audi themselves.
 

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wja96 said:
RossTech have managed to make a system with 90% of the functionality for about £250 a licence.
tter said:
yes indeed but there is some modules that VCDS still can't talk to without the passwords which audi seem to install on some of their newer cars e.g the ABS module.maybe they're getting wise to the cheaper version of the diagnostic tools and ensuring the only way to get things done is to goto audi themselves.
Anyone can get a VAS machine. It's just ruinously expensive. I'm sure your Indy would rather not have it, but it makes life easy and I would say it marks them out as a "proper" VAG specialist.

As regards the SKC "password" you need to reprogram keys and access the ABS controller etc. it can be extracted from the car with VAG Tacho or VAG Commander, at which point you can do whatever needs doing. This is fairly specialist stuff, but most decent Indy garages have all this gear. Shark Performance in Mansfield charge £35 to extract the SKC, at which point your copy of VCDS has a lot more options!

It's worth having a look at the VAG Commander website, if only to see how many tools there are for getting into your car and getting it moving! I was quite surprised that the "Tango" device that programs immobilizer transponders, plus new transponders for my car, could be had for less than €2000. Amazing!
 

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Discussion Starter · #10 ·
Well my VCDS lead seems ok, connects to a Golf mkv tdi fine. Car is booked in with local dealer to see what's up. will get the ttrs brake recall sorted at the same time 8)
 
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powerplay said:
Well my VCDS lead seems ok, connects to a Golf mkv tdi fine. Car is booked in with local dealer to see what's up. will get the ttrs brake recall sorted at the same time 8)
what recall would that be ?
 

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tter said:
powerplay said:
Well my VCDS lead seems ok, connects to a Golf mkv tdi fine. Car is booked in with local dealer to see what's up. will get the ttrs brake recall sorted at the same time 8)
what recall would that be ?
Strictly speaking it's not a recall but a 'Product Enhancement'. Hence the car owner does not get formal notification from the dealer (although some better dealers may do this) but the work is auto added to the work sheet the next time the car is in for service work.

There are two separate items:
1. 46F6 - Fit 'air guides' for the front brakes. These fit to the lower wishbone and are supposed to direct air towards the brake disc. The detailed Audi work description includes replacing the front brake pads. Some people who've had brake squeal have had the disc replaced at the same time.

2. 97V9 - Replace the gearbox earth lead. The tab on the cable at the chassis end may turn on its fastener so the replacement cable has a small nib on that tab to prevent turning.

On your 2012 car the work may already have been factory done. Your dealer can easily check against the Audi reference numbers quoted above.
 
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brittan said:
tter said:
powerplay said:
Well my VCDS lead seems ok, connects to a Golf mkv tdi fine. Car is booked in with local dealer to see what's up. will get the ttrs brake recall sorted at the same time 8)
what recall would that be ?
Strictly speaking it's not a recall but a 'Product Enhancement'. Hence the car owner does not get formal notification from the dealer (although some better dealers may do this) but the work is auto added to the work sheet the next time the car is in for service work.

There are two separate items:
1. 46F6 - Fit 'air guides' for the front brakes. These fit to the lower wishbone and are supposed to direct air towards the brake disc. The detailed Audi work description includes replacing the front brake pads. Some people who've had brake squeal have had the disc replaced at the same time.

2. 97V9 - Replace the gearbox earth lead. The tab on the cable at the chassis end may turn on its fastener so the replacement cable has a small nib on that tab to prevent turning.

On your 2012 car the work may already have been factory done. Your dealer can easily check against the Audi reference numbers quoted above.
thanks for that and yes it has including my complaint for none squeal pads :D
 

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Discussion Starter · #14 ·
tter said:
brittan said:
tter said:
what recall would that be ?
Strictly speaking it's not a recall but a 'Product Enhancement'. Hence the car owner does not get formal notification from the dealer (although some better dealers may do this) but the work is auto added to the work sheet the next time the car is in for service work.

There are two separate items:
1. 46F6 - Fit 'air guides' for the front brakes. These fit to the lower wishbone and are supposed to direct air towards the brake disc. The detailed Audi work description includes replacing the front brake pads. Some people who've had brake squeal have had the disc replaced at the same time.

2. 97V9 - Replace the gearbox earth lead. The tab on the cable at the chassis end may turn on its fastener so the replacement cable has a small nib on that tab to prevent turning.

On your 2012 car the work may already have been factory done. Your dealer can easily check against the Audi reference numbers quoted above.
thanks for that and yes it has including my complaint for none squeal pads :D
Indeed thanks, that's useful info. When I was on the phone the Audi tech confirmed the brake enhancement was due on my TT, I didn't know about the gearbox earth lead and he didn't mention it so I will ask when I go in there.

On another note, just got back from a journey and, from being on this morning and for the last few days, the warning light has disappeared as suddenly as it appeared. Very confusing! Not had the chance yet, but will see if that means I can now connect successfully with vcds...
 
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