Electronic Immobilizer

Hey everyone!

Does anyone have any idea how the transmission works in WFS! What I'm particularly interested in is the frequency band and the capacity of the chip on which the encoding is located.
I'm actually considering (of course, if possible) adding a few more features to the key.

base-freq. is indicated on the key, typically 433MHz.

complete digital transmission, all components are standard.
However, you will not be able to access the firmware in the controller, nor the one in the comfort control unit.
ab IMMO-3, the entire system also uses a changing code.
Cryptography is not a mystery; the methods used are similar to those used in RSA, as used by PGP.

-> unlock the key and write down the part names
-> Google and the manufacturer's homepage are your best friends.


what are you planning to do with your 'extrabits'?

See you, Gremlin

Well, last week I installed a chip with wireless functionality, because my girlfriend seems to understand that the car should heat up as quickly as possible.
But I'm a bit forgetful, and so the chip is usually always on.
Now I've had the idea that I'll do it like Mercedes does with the memo function, so that the chip is only activated with my key. Well, let's see.

Um, are 433 MHz only for the remote control?

I think the WFS has a much lower frequency.

Please clarify if I am wrong.

already correct...

I have described the FFB.
You can't easily access the WFS (i.e., the firmware in the instrument panel), and you certainly can't access the transponder in the key (the glass tube). Trying to replicate this yourself is probably not feasible either.

'Furthermore, using the FFB also makes it possible to use tuning. However, even in this case, it is unlikely that you will be able to access the firmware in the control unit using DIY methods.'
the ZV knows which key opens it (it is also readable in the measurement blocks), maybe one can somehow get this information...

In this specific case, I would rather focus on training myself to disable tuning.
Maybe you could also add a relay or something similar that would trigger a light sensor when the door opens, and the tuning is turned on. Or, you could attach an eye-shaped LED... The receiver for the tuning probably has enough capacity for that...

See you, Gremlin

Here's a "bold" idea:

There are also these memory foam seats. The control unit also knows which key is used to open the door and adjusts the seats accordingly.

If you then retrofit this control unit and subsequently program the seat positions differently, it should be possible to switch a relay according to the key (remote control) by querying these positions.

I know, it's very bold, but it just occurred to me!

Hi,

What do you think of a primitive mechanical solution?

Are you not all different sizes, or?

Just attach a microswitch to the seat rails, and configure it so that it only activates when the seat is in "your" position.

Best regards,

Jan

Option 1:
How about a self-sustaining circuit, for example?

When you get in, press the button, and as long as the ignition remains on, the tuning will also remain active. Once you turn off the ignition, the tuning also turns off and only switches back on after pressing the button again after the next ignition.

Therefore, you must press this button briefly each time you start it. It automatically turns off with the ignition, so you won't forget.

Disadvantage: Your better half can only discover the button...

Variant 2:
Replace the remote control unit of the chip with a keyless go system. This way, the tuning is only active when you are in the vicinity of the vehicle with the keyless go card. Your wife won't get a card, so she won't get any modifications.

Disadvantage: Cost

Greetings
Private

Option 3: Explain to your girlfriend that she shouldn't start the cold engine like that, because you don't want to spend several thousand euros on a replacement engine, and therefore your nice vacation by the sea might be canceled, and you might then have to think about a replacement girlfriend...

yes, 10 Points go to Rainer. It's also not that difficult for a woman.

Forget it...

Women are completely uninterested in cars. (This applies to 98% of the women I know).
For her, a car is just a piece of iron, with which she can travel dry and comfortably from A to B. Nothing else is done except to refill the fuel. (I know women who let their husband drive THEIR car to the gas station so that he can fill it up, because they themselves can't figure it out. No joke!)
There isn't any special care required; it's a purely, genuine, used item.
'There, you can say 1000x what you want...'

In the workshop, housewives' cars and retiree cars are the worst.
I had to fix a Corsa right in the middle of nowhere, in the middle of the night. The lights weren't working... the switch was completely broken. 'On the record: 'Yes, he's been making strange noises for about six months, and sometimes there's been a burning smell, and even a little bit of smoke. But if you tap on it, it always makes a sound.'

So long as it doesn't exceed +-2g acceleration or stop running altogether, our only option is to build an absolutely foolproof tuning system...

or simply using the brain we have been given, and turning it off when we get out

*duck and weave*

See you, Gremlin

Hi,

Variant 4:

Attach a small circuit to the coolant temperature sensor, which only allows the tuning to be activated when a specific temperature is reached. Alternatively, it is also possible to achieve a "negative" 10 cent tuning in the cold state, which means a reduction in performance.

Best regards,

Jan

Gremlin wrote:

Women are completely uninterested when it comes to cars. (This applies to 98% of women) women I know).

Wow, I really hit the jackpot when I got

She is now driving an Ibiza TDI, and finds it more suitable and therefore more economical than many men in my circle would understand.

And her old habit of using the emergency brake to "torture" the car when stopped at red lights has also largely disappeared after a few explanations and reminders from me.

But don't ask me where to find such women... She certainly doesn't have any sisters.

Hey everyone!

The first test version is already running. A standard EVVA key transponder, which is currently still attached to the keychain, was helpful in this process. The signal is received by a 12V door lock, which then activates the relay for the chip.
However, I am currently in the process of inserting the transponder chip, which fortunately does not require power, into the key --> well, we will see if it works.

do you mean something like the ones you find at Conrad and ELV?

also a solution.
...so that the two systems don't interfere with each other... Have you ever measured the frequencies of the reading coils?

See you, Gremlin

Okay. The fun cost approximately 50€.
And as far as I understand, this project is running in a different series.