What's the key "coded" to do?

devonutopia · 14-06-2005, 21:07

I'm a bit of a nugget when it comes to this soooo, I just wanted some yay/nay answers, maybe with quick solutions? Thanks

The barrel of the car has a mechanical side to it, that the key matches, like a Yale for a house door? So, any key won't fit any barrel?
The key then sends its "programming" which I assume to be a four digit code, to the dashpod/ECU which de-immobilises the car allowing ignition.
If the key if not programmed with the right code, it will start the car, but it will cut out after only 2 or 3 seconds as the immobiliser cuts in?
The key/s once REprogrammed to give the car the four digit code it needs to de-immobilise and start, will STILL open the original car door locks by key alone? (note matching barrel, different "program")
Finally, I think this has been confirmed already, but my remote central locking button will be unaffected by ANY key re-programming.

Right - all this would put my anxiety at rest, as it seems likely the "removal" stage of my conversion will be happening VERY shortly

Still struggling with VAG com though - put a shout out on SCN for help now.

Dr Zoidberg · 14-06-2005, 21:18

There is a (4?) digit code that skoda supply to the dealers to allow them to code new keys to the car , but I'm pretty sure that the data that the chip in the key sends to the immobiliser is longer than 4 digits. This along with the physical bit of the key and barrel allows the car to be started

With just the physical key I doubt the immobiliser will even allow the car to start.

The "remote" bit of the key also needs to be coded to the car (or at least mine did when I got a new key - it came as two halves each of which needed to be programmed) and it's not a fixed code that it sends , but a rolling one that changes each time

devonutopia · 14-06-2005, 21:20

I should say my RCL is a BigK aftermarket jobbie, with separate module and separate lock/unlock buttons on a separate fob. Just for info.

Lummox · 14-06-2005, 21:27

The key has a transponder chip in it, this can be programmed. There is no physical ident to the chip. Any key can be programmed to start any car as long as there is a mechanical key in the lock to activate the ignition.

So to sum up you can throw them keys you have with the donor engine in the bin, you dont need em. You can code your keys to the dash which will signal the immobilizer to start.

Dr Zoidberg · 14-06-2005, 21:31

Quote:

Originally Posted by devonutopia

I should say my RCL is a BigK aftermarket jobbie, with separate module and separate lock/unlock buttons on a separate fob. Just for info.

Then in that case it will be unaffected.

WW_VRS · 14-06-2005, 21:37

I seem to remember the sticker with the letters/numbers in the boot and the service handbook allow the dealer to recode it - but luckily I've not had to find out if my theory holds

Can't wait to say Jason's car when it's done though, should be interesting

devonutopia · 14-06-2005, 22:24

Quote:

Originally Posted by Lummox

The key has a transponder chip in it, this can be programmed. There is no physical ident to the chip. Any key can be programmed to start any car as long as there is a mechanical key in the lock to activate the ignition.

So to sum up you can throw them keys you have with the donor engine in the bin, you dont need em. You can code your keys to the dash which will signal the immobilizer to start.

IF

I have the four digit code, is that what it uses, or is it another one of the magic numbers off the dashpod the key needs reprogramming to? having never used VAG com in any sense, I don't know the true ins & outs of its mechanics.

I don't really want to keep the flick key/barrel the car came with anyway - Its got the RCL bit integrated in it, that I don't require, plus its a little bulky too. Would rather keep my current TWO keys and have a spare, AS LONG as they both still open the two front doors, via the key/lock

Would hate to lock myself out the car, if the RCL battery should pack up.

Lummox · 14-06-2005, 22:34

We seem to be going around in circles here.

The four digit code is an access code do enable a signal sent from the immobilizer which codes the key.

YOU WILL NOT NEED THE NEW KEYS OR REMOTES AND YOU CAR WILL WORK IN EXACTLY THE SAME WAY IT ALLWAYS DID.

devonutopia · 14-06-2005, 22:44

Quote:

Originally Posted by Lummox

We seem to be going around in circles here.

The four digit code is an access code do enable a signal sent from the immobilizer which codes the key.

YOU WILL NOT NEED THE NEW KEYS OR REMOTES AND YOU CAR WILL WORK IN EXACTLY THE SAME WAY IT ALLWAYS DID.

Thanks

I never realised it went THAT way around. Thought they key had to be programmed by vag com, not vag com used to access and then the car codes the key itself. sorry.

God damn it, I'm gonna have to get this program working and learn it myself.

Etos · 14-06-2005, 23:05

You code ECU to the key not key to the ECU

devonutopia · 14-06-2005, 23:11

Quote:

Originally Posted by Etos

You code ECU to the key not key to the ECU

You learn something new every day.

Its 23 hours into this day in particular, and I've now learned that "new thing"

Just feel sheepish about what it takes to drum it into me... Repeat after me...

Ecu codes key, ECU CODES KEY! ECU CODES KEY!

Etos · 14-06-2005, 23:39

Page 58 of the handbook,
If the electronic chip in the handle of the key is damaged, the engine switches off by itself after 3 seconds. It is possidle to select an emergency code and in this way to deactivate the immobiliser.
The 4-digit code you have is that code

WW_VRS · 15-06-2005, 08:23

Cool

Lummox · 15-06-2005, 18:26

The four digit code doesnt de activate the immoblizer, is an access code to recode the key. So then the immobilizer works as normal.

***ncarring*** · 15-06-2005, 18:48

Now my curiosity is aroused - what 4 digit code? Does this apply to Mk 1 Octavias also?

Ta

Lummox · 15-06-2005, 19:06

Applys to all VAG vehilces with immobilizer 1 onwards, inc the octavia 1. The code has since been superceeded by a seven pin number which includes a date code so can only be used on the day supplied, but Skoda havent changed over to this system yet, but its on the way.

The four pin code can be obtained one of two ways, by your dealer emailing Skoda or it behind the scratch of panel on the long plastic tag supplied with your keys.

The code is required if you want to,

Add or recode new keys
Change the dash insert
Change the engine ECU

devonutopia · 15-06-2005, 22:11

Quote:

Originally Posted by Lummox

The code is required if you want to,

Add or recode new keys
Change the dash insert
Change the engine ECU

So, first one for me then,

Another dumbass Q then, if you're changing both 2) and 3) from your list at the same time, which are matching, then no further action is required, as they match.

14-06-2005, 21:07	#1
devonutopia Mongreller Join Date: Apr 2003 Location: Exeter / Devon Posts: 30,490 Members Car: Skoda Fabia Mongrel Images: 5 Thanks: 79 Thanked 381 Times in 322 Posts	What's the key "coded" to do? I'm a bit of a nugget when it comes to this soooo, I just wanted some yay/nay answers, maybe with quick solutions? Thanks The barrel of the car has a mechanical side to it, that the key matches, like a Yale for a house door? So, any key won't fit any barrel? The key then sends its "programming" which I assume to be a four digit code, to the dashpod/ECU which de-immobilises the car allowing ignition. If the key if not programmed with the right code, it will start the car, but it will cut out after only 2 or 3 seconds as the immobiliser cuts in? The key/s once REprogrammed to give the car the four digit code it needs to de-immobilise and start, will STILL open the original car door locks by key alone? (note matching barrel, different "program") Finally, I think this has been confirmed already, but my remote central locking button will be unaffected by ANY key re-programming. Right - all this would put my anxiety at rest, as it seems likely the "removal" stage of my conversion will be happening VERY shortly Still struggling with VAG com though - put a shout out on SCN for help now. __________________ Jason - Only a Skoda. Custom Fabia Bonnet Lifter Kits - £45! Click Me. BRISKODA CLUBSTAND @ Castle Combe! 25/04/09! Track session too! Click me! See the mongrel's 260bhp Dyno Video!

14-06-2005, 21:18	#2
Dr Zoidberg Briskodian Join Date: Jun 2003 Location: On the back of an AA truck with a failed turbo Posts: 10,859 Members Car: Octavia II 2.0 TDi Elegance Thanks: 34 Thanked 199 Times in 150 Posts	There is a (4?) digit code that skoda supply to the dealers to allow them to code new keys to the car , but I'm pretty sure that the data that the chip in the key sends to the immobiliser is longer than 4 digits. This along with the physical bit of the key and barrel allows the car to be started With just the physical key I doubt the immobiliser will even allow the car to start. The "remote" bit of the key also needs to be coded to the car (or at least mine did when I got a new key - it came as two halves each of which needed to be programmed) and it's not a fixed code that it sends , but a rolling one that changes each time __________________ Alex "I laugh in the face of danger, then I hide until it goes away" www.drzoidberg.co.uk Last edited by Dr Zoidberg; 14-06-2005 at 21:30.

14-06-2005, 21:20	#3
devonutopia Mongreller Join Date: Apr 2003 Location: Exeter / Devon Posts: 30,490 Members Car: Skoda Fabia Mongrel Images: 5 Thanks: 79 Thanked 381 Times in 322 Posts	I should say my RCL is a BigK aftermarket jobbie, with separate module and separate lock/unlock buttons on a separate fob. Just for info. __________________ Jason - Only a Skoda. Custom Fabia Bonnet Lifter Kits - £45! Click Me. BRISKODA CLUBSTAND @ Castle Combe! 25/04/09! Track session too! Click me! See the mongrel's 260bhp Dyno Video!

14-06-2005, 21:27	#4
Lummox Partner Join Date: Sep 2003 Location: Newport Pagnell Posts: 22,963 Members Car: Mk2 Golf GTi 16v and building a 20VT MK2. Images: 2 Thanks: 29 Thanked 831 Times in 699 Posts	The key has a transponder chip in it, this can be programmed. There is no physical ident to the chip. Any key can be programmed to start any car as long as there is a mechanical key in the lock to activate the ignition. So to sum up you can throw them keys you have with the donor engine in the bin, you dont need em. You can code your keys to the dash which will signal the immobilizer to start. __________________ www.unit18.co.uk Remapping Service now available, PM for details.

14-06-2005, 21:37	#6
WW_VRS Escorted Estate Join Date: Nov 2004 Location: Oxfordshire/Berkshire Posts: 9,961 Members Car: Ford Escort 1.6LX + Fab Estate Thanks: 48 Thanked 92 Times in 82 Posts	I seem to remember the sticker with the letters/numbers in the boot and the service handbook allow the dealer to recode it - but luckily I've not had to find out if my theory holds Can't wait to say Jason's car when it's done though, should be interesting __________________ WW --->> Project Journal (pic links in first post there) Lummox'/Ross thread on Unit18 Automotive progress on my car: here

14-06-2005, 22:34	#8
Lummox Partner Join Date: Sep 2003 Location: Newport Pagnell Posts: 22,963 Members Car: Mk2 Golf GTi 16v and building a 20VT MK2. Images: 2 Thanks: 29 Thanked 831 Times in 699 Posts	We seem to be going around in circles here. The four digit code is an access code do enable a signal sent from the immobilizer which codes the key. YOU WILL NOT NEED THE NEW KEYS OR REMOTES AND YOU CAR WILL WORK IN EXACTLY THE SAME WAY IT ALLWAYS DID. __________________ www.unit18.co.uk Remapping Service now available, PM for details.

14-06-2005, 23:05	#10
Etos Briskodian Join Date: Apr 2005 Location: Midlands UK Posts: 57 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	You code ECU to the key not key to the ECU

14-06-2005, 23:39	#12
Etos Briskodian Join Date: Apr 2005 Location: Midlands UK Posts: 57 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Page 58 of the handbook, If the electronic chip in the handle of the key is damaged, the engine switches off by itself after 3 seconds. It is possidle to select an emergency code and in this way to deactivate the immobiliser. The 4-digit code you have is that code

15-06-2005, 08:23	#13
WW_VRS Escorted Estate Join Date: Nov 2004 Location: Oxfordshire/Berkshire Posts: 9,961 Members Car: Ford Escort 1.6LX + Fab Estate Thanks: 48 Thanked 92 Times in 82 Posts	Cool __________________ WW --->> Project Journal (pic links in first post there) Lummox'/Ross thread on Unit18 Automotive progress on my car: here

15-06-2005, 18:26	#14
Lummox Partner Join Date: Sep 2003 Location: Newport Pagnell Posts: 22,963 Members Car: Mk2 Golf GTi 16v and building a 20VT MK2. Images: 2 Thanks: 29 Thanked 831 Times in 699 Posts	The four digit code doesnt de activate the immoblizer, is an access code to recode the key. So then the immobilizer works as normal. __________________ www.unit18.co.uk Remapping Service now available, PM for details.

15-06-2005, 18:48	#15
*ncarring* Don't talk, drive! Join Date: Feb 2003 Location: The B roads of Britain Posts: 13,023 Members Car: 1983 Porsche 928S / 1972 MGB GT Thanks: 20 Thanked 100 Times in 83 Posts	Now my curiosity is aroused - what 4 digit code? Does this apply to Mk 1 Octavias also? Ta __________________ Nick North Wiltshire RoADAR

15-06-2005, 19:06	#16
Lummox Partner Join Date: Sep 2003 Location: Newport Pagnell Posts: 22,963 Members Car: Mk2 Golf GTi 16v and building a 20VT MK2. Images: 2 Thanks: 29 Thanked 831 Times in 699 Posts	Applys to all VAG vehilces with immobilizer 1 onwards, inc the octavia 1. The code has since been superceeded by a seven pin number which includes a date code so can only be used on the day supplied, but Skoda havent changed over to this system yet, but its on the way. The four pin code can be obtained one of two ways, by your dealer emailing Skoda or it behind the scratch of panel on the long plastic tag supplied with your keys. The code is required if you want to, Add or recode new keys Change the dash insert Change the engine ECU __________________ www.unit18.co.uk Remapping Service now available, PM for details.

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What's the key "coded" to do?

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