NefMoto

was thinking is there any way to add an immobilizer to the b5 platform using an A6 ecu that has the serial eeprom in it.  Will probably need a portion of the ignition switch and also a new key with a chip, just curious if it will be possible.  Would be a good security feature for the older cars that tend to get jacked too often.

ECU
CLUSTER
CCM

buy an aftermarket alarm system. waaaay easier.

I think you could probably enable the immobilizer between the ECU and cluster to prevent people from switching out either of those two parts. But adding immobilizer support for the key would definitely require replacing parts. All comes down to price and availability of parts I guess.

I have a cluster RS4, I could get an a6 or allroad Ecu. What is CCM? The key part?

Why has this stalled? I no one interested in making their S4 harder to steal?

Most Euro S4's have Immo.

I don't imagine it would be as simple to copy the C box eprom to say an M box though.

Rick

yea i still have interest in this also, kinda why i posted the topic.  Does anyone have access to a Bentley manual for an A6? i want to look at the wiring diagrams to see what is going on.  I know on the earlier models there is a dash module which interfaces to the ecu and the key. 

Take a look at this page, pretty easy to put the rfid pellet in our keyfobs don't already have one in there, im going to take a key apart when i get home to see if it actually does.
http://www.myturbodiesel.com/1000q/a4/vw-smart-key-remote-replacement.htm

http://www.autotronics.co.uk/cscart/images/detailed/0/29897_29896_10_Audi_Immobox_Delphi.png

mine has the pellet in the key fob..

I will download a 2002 A6 wiring diagram for us to compare... let's get this done... I really want IMMO in my car...

I have an RS4 cluster, so that part is taken care of.. now just need to get the other parts and seemingly a tune/bin file that has immo enabled to put on an A6 IMMO ECU (maybe 551R)?

im not even sure if you need an a6 or ar ecu, think if you flash the serial eprom from an AR or A6 one and put an a6/ar 800bb bin back you will be ok.  I was messing with an ar ecu last night and it seems that all the coding is in the eprom for the immo cause i tried to bench flash it and it would not take, i flashed the serial with an m box serial and i could flash fine.

I was going to try flash a spare m box i had to see if it would think it had an immobilizer on it.

I dont even think you need the cluster to do this mod, the cluster is more of just the status indicator i think for the early models. 

Im really thinking this will be easy as the dash immobilizer box is all K line controlled, so you can pretty much interface it anywhere there is a k line.  just need to get the wiring diagram to see what else goes into that box.

Also how to pair the rfid in the key to it.

So I've done some digging...

As far as I can tell, you will need an IMMO III cluster... a ignition coil/reader to read the pill in the key (goes/wired to the cluster), CAN lo/hi from cluster to the ECU, and matching VIN's from the cluster and EEPROM on the ECU... then you need an IMMO enabled flash.

This is what I've gathered from searching last night, and also looking at 2002 A6 wiring diagrams.

I have acquired another part of the puzzle:

(https://lh4.googleusercontent.com/-dT40ajTTrs8/T14nS0S-9pI/AAAAAAAABII/9bxi4jJJ3tg/s400/IMG_20120312_124058.jpg)

CAN High Bus = ECU/60 > A121 tap in inst harness > grn plug on cluster pin 18, org/blk wire
CAN Low Bus = ECU/58 > A122 tap in inst harness > grn plug on cluster pin 19, org/brn wire

My guess after a quick look for the coil

Ign coil (D2) pin 1 > grn cluster plug T32a pin 2, grn wire
Ign coil (D2) pin 2 > grn cluster plug T32a pin 17, blk wire

^^^ very nice, thanks :)

not sure what the next step would be.. but I assume I will try to read out my friends allroad EEPROM... then I suppose I would need to edit it to match the VIN in the RS4 cluster of mine and stick it into my ECU.

Once everything is wired up, decide what flash/software to use that will enable the IMMO.

Does anyone know how to confirm what version of IMMO a 2002 allroad has?

I have read that if the cluster via VAG-COM diagnostics shows the vehicles VIN it's IMMO III and if not it's IMMO II. Is this correct?

2002 model might have immo3, it was introduced around that time.
In immo3 clusters, VIN is shown in the additional info field.

You DO know that disabling the IMMO takes 30 seconds over the OBD port with the right tool right?  ;D

I'm aware of this.. but I'm also aware that 98% of people will not have the tools or the know how to use them in order to take my car.

And having IMMO is better then not having it at all... besides it wouldn't be the only safeguard I have... just another one that is mostly transparent in operation which is nice.

The $1 mil question is can this be done without key with valid immo ID? remember that while it is possible to disable immo with a tool via OBD2 with a tool, it so only because you normally have original key with valid immo ID in the ignition which is a prerequisite for ECU to allow programming session.

If you don't have valid key in or do it on the bench, it is not that easy. It requires boot mode programming.

I am not 100% sure if there is a work around this by hacking into a cluster, taking SKC and re-programming it to some other ID, then trying to do ECU adaptation to your "hijack" immo id with the VCDS procedure, but it sounds like a lot of effort to jack somebody's car. It would just be easier to flatbed the car tbh.

Just a few thoughts on this, 

-Yes, it is possible to read the me7 eeprom via obd and disable the immobilizer with some tools regardless of if they are matched or a valid key is used.  This I have done and know sure.

-If you're really worried about someone disabling the immobilizer over obd why not just install a K wire kill switch somewhere.  It would slow someone down, and they probably wouldn't hang around to check wiring.  If they really want your car they'll come with a spare ecm with the immobilizer off or a flatbed but it's a easy inexpensive way to make it harder. 

-As for actually adding the immobilizer to an s4, when matching the ecm and cluster I believe there are more than just the vin and skc.  To use vag commander nomenclature there are component security and mac bytes .  I started doing some experiments on this but lost interest. I will take a look if you guys would like, or maybe you already have this figured out.  From what I remember it didn't appear be as simple as putting the same values in both the ecm and cluster but I'm not sure.  To further complicate things I'm fairly certain you can only replace 1 component (ecm/cluster/key) at a time or else you need to replace all with new previously unadapted parts.  I know vag commander has functions to reset the ecm or cluster to virgin state but I haven't personaly tested these functions.  Again, I have some cluster bin files showing various states of being adapted so I could try to find various values in the bin file but I haven't had time to really disect them.  If it will help I'll try to find them and see what I can get out of them.  All of my research files are from golf/jetta cars with vdo clusters just to warn you.  Who is the manufacturer of the rs4 immo clusters?