immobiliser

[silver123]

I read ross tech's site about immos. I found that only immo 1 system uses a static code later systems up to immo 5 use roling code.
Immo module is located in the instrument cluster.

Magnetic field round ignition lock apply power to the transponder located in the key. Transponder then transmits code to the immo module. But how does communication continue then?

Does immo module simply sends the code to the ECU which perform validation checking or does immo module perform this task and then sends some kind of signal (crypted/uncrypted?) to the ECU.

What does rolling code means and how it works?
I guess that code is changed every time it is used (like in a remote conrol key fob), but as I aslo don't know how remote fob works I even don't know how immo works?

But I predict that both receiver and transmitter have some kind of a table that contains numerous codes. After each code is used it is removed from the table (both receiver's and transmitter's).

But there is some problem. If the remote key fob remove one code after you press the lock/unlock button, but car's receiver module not (unsuccessfull communication - intentionally signal disturbance, likely by someone who want to steal your wehicle), the code could be used to unlock a car.

So is ther any way to get the immo code via OBDII port or to bypass the immo module in the cluster?

 

[horace1664]

So is ther any way to get the immo code via OBDII port or to bypass the immo module in the cluster?

Why would you want to do this, apart from the obvious reason?

 

[Chemical Al]

vag com will not read your skc/login code. there are various other programs/methods of doing it though

 

[silver123]

Why would you want to do this, apart from the obvious reason?

what's your wiev of obvious reason?
If you aplly that I am a criminal you are funny man?
Apart from that what can man do with a stolen vehicle?
criminals who steal cars are organized and are just part of a big association.
Just one can't do much.

My curiousity is because I want to understand how well vags are protected against thiefs. I know couple of people who were victims of car thiefs. Cars were all VAGs.

And as most new cars that are stolen in our country are VAGs and as I am one of the OWNER of a new VAG I am right to be concern, don't you think?
BTW I am a student of a final class in a criminal justice faculty, and we also have a subject criminal methodology where we also talk about property criminal - car thies.

So if you have any answers please let me share them, else don't be funny!

vag com will not read your skc/login code. there are various other programs/methods of doing it though

So there is a way to get a SKC code out of a immo module? Then as unlocking the door is an easy task, bypassing the immo aslo isn't an impossible task?

What about immos. VAG already made five immos, the latest is immo 5, and it is integrated in the ECU, so really only way to bypass it is to extract SKC code out of them, but my VAG supplier told me that this is inpossible.

Older immos like immo1 didn't even have roling code and they were integrated in the instr cluster and connected to the ECU. BUt once again, did ECU store the SKC code or immo module? Could such an immo be bypassed with a removal of cluster?

 

[horace1664]

what's your wiev of obvious reason?
If you aplly that I am a criminal you are funny man?

1) I asked why you were trying to do this, as it is a rather strange thing to do to your own car!

2) If anyone posts info as to how to do this, I also find it strange as they are putting their own cars at risk.

3) I did not write the second quote that you gave me credit for because of my answer to number 2) above.

4) For some useful reading, I believe Phillips semiconductors were involved in the development of these systems, and may make for some interesting reading.

Regards

James

 

[Chemical Al]

So there is a way to get a SKC code out of a immo module?

yes

Then as unlocking the door is an easy task, bypassing the immo aslo isn't an impossible task?

no its not

What about immos. VAG already made five immos, the latest is immo 5, and it is integrated in the ECU, so really only way to bypass it is to extract SKC code out of them, but my VAG supplier told me that this is inpossible.

dunno about that, but im sure there is probably a way

Older immos like immo1 didn't even have roling code and they were integrated in the instr cluster and connected to the ECU. BUt once again, did ECU store the SKC code or immo module? Could such an immo be bypassed with a removal of cluster?

the login code will be stored on the immob module i would say. cant see any reason for it to be stored on the ecu

Could such an immo be bypassed with a removal of cluster?

dunno, go take yours out and see

you really should have a read on the ross tech web site, most of this is on there.

 

[Chemical Al]

2) If anyone posts info as to how to do this, I also find it strange as they are putting their own cars at risk.

if he is after info on how to do this he will be waiting a long time, the only info i can give is what i have read about reprogramming keys. i know nothing about bypassing the immobs. i do know that it is possable and its not that hard, people do it when they strip there cars out for trackday cars.

i dont think its a 2 min job especially with a car alarm going off and a laptop in your hand lit up like a chrismas tree

 

[horace1664]

if he is after info on how to do this he will be waiting a long time, the only info i can give is what i have read about reprogramming keys. i know nothing about bypassing the immobs. i do know that it is possable and its not that hard, people do it when they strip there cars out for trackday cars.

i dont think its a 2 min job especially with a car alarm going off and a laptop in your hand lit up like a chrismas tree

I wasn't having a go at you, or indeed Silver123, I just feel that it is not a subject to be discussed on an open news group..

James

 

[Chemical Al]

i totally agree with you, i think that the only people who know the answers are people who make a living from it i.e. car locksmiths etc. and they aren't going to tell everyone and take business away from themselves.

 

[Theresias]

#1 Every VW/Audi/Seat/Skoda can be stolen.
#2 Immobilizer 1-3 (some IMMO 4 too) can be defeated within much less than a minute WITHOUT having/extracting the SKC.
#3 If worst comes to worst thiefs simply replace the ECU with an altered one, fire up the car, gone.
#4 Car alarm will in most cases not be triggered and even then nobody really cares these days about an alarm on the street.
#5 This is NOT a topic which one should discuss in a public forum.

 

[skott101]

As Sebastian rightly points out, any car can be stolen if the thief tries hard enough.

As far as your immo question is concerned, ECU's can be de-transpondered by companies with the right equipment so that the ECU doesn't look for the immo code and just starts the engine up. It takes about 40 seconds to do when you've connected up to the car.

In my experience, if a thief wants the car, he will just put a brick (or in my case a paving slab) through your window and go get the keys from your house and simply drive off in the car.

 

[Big_daddy]

#1 Every VW/Audi/Seat/Skoda can be stolen.
#2 Immobilizer 1-3 (some IMMO 4 too) can be defeated within much less than a minute WITHOUT having/extracting the SKC.
#3 If worst comes to worst thiefs simply replace the ECU with an altered one, fire up the car, gone.
#4 Car alarm will in most cases not be triggered and even then nobody really cares these days about an alarm on the street.
#5 This is NOT a topic which one should discuss in a public forum.

Agree, a few subaru alarms been by passed as theifs have just linked they own ecu into the harness , hot wired the ignition and drove off.
There are so many ways to steal cars, not some thing ppl would like to go to detail on a open forum.
By the way my neighbours keys got stolen from they house but the car was not taken. Something ppl would take in consideration were they leave they car keys