DIY Car Theft Prevention A6 AFN! How?

Dear A6 Specialists,

I would like to make my A6 a bit more theft-proof.
I was thinking about a hidden switch that cuts off an electrical circuit.
However, the starter should still turn to simulate a start.
What if you cut the ground or positive wire to the shut-off valve on the ESP?
What could happen, what damage could occur if you forget?
Perhaps someone knows a simpler, ingenious idea.
Thank you for detailed instructions.

Best regards,
Tobias

Hello Tobi,

your A6 has an immobilizer, doesn't it :lol:

Interrupting the shut-off valve is a known method for aftermarket alarm systems. This will certainly give your thief a moment, but it can only prevent theft to a limited extent. However, you will constantly have to deal with the switch.

In that case, you would have to come up with some kind of trick that no one knows. However, discussing this in public forums makes little sense.

Best regards,
Wolfgang

Just always switch off relay 109. Some technicians from the VAG contract workshop don't even find the error:lol:

[quote="DocSnydor"]Sometimes, even technicians from the VAG-contract workshop don't notice the error:lol:
Well, in my opinion, this test criterion has no real practical relevance regarding the unovercoming nature of the lock by auto-lockers:twisted:

Conversely, it's more accurate:
A technically skilled auto-locker could certainly make many contract workshops, along with Elsa and (all the others), dance on the wall...

Well,
usually, a thief wants to steal a car quickly and not spend a long time looking for one.
Can something happen to the ESP if someone is messing around and the shut-off valve is closed?
With experts, you don't have a chance anyway.

Best regards, Tobias

Although the beginners are likely to fail at IMMO2/3... and if IMMO is not a problem, I don't think a well-executed 109 is an obstacle... This is my opinion.

Before I start a new thread on this topic, I'll just use the existing one, even though it's old!

The idea of a hidden switch has been on my mind for a while. While I don't have a VP-TDI, but a PD, there's definitely something that can be done here. The position of such a switch shouldn't be discussed on the forum, but rather the question of which wire could be misused for this purpose. Does anyone have an idea that would minimize the risk of errors if I forget about it later?

Hello RTDI-Tom,

I also installed a hidden switch a few years ago. But it's a VP-TDI.
It works perfectly, even I find it a bit nerve-wracking when the engine doesn't start immediately.

I see it the same way. The surprise when the car doesn't start immediately is definitely a deterrent for potential thieves.

Maybe just pull out some fuses (e.g., MSG) and see which one prevents the car from starting.
GOOD!!! Insert the switch into the line -> DONE.

I had a petrol Opel Kadett about 10 years ago, and I simply removed and took the fuel pump relay. At that time, I still lived and worked in Frankfurt/Oder. The car was broken into four times within a year, and each time the thieves tried to take it with them.

"Shall we walk or take a Kadett?" :wink:

Even with a manipulated ignition switch, all the lights on the dashboard worked as usual, and the starter also functioned, making it hardly noticeable. With the remaining fuel in the fuel injection system from the previous use, the engine even started briefly, and if the thief immediately drove off, it would stall a few meters later in the middle of the road. The engine would die and was also difficult to restart, even with good noodles.

The first time, the car stalled in the parking space and was left with a dead battery. The next three attempts each ended with a stubborn Kadett parked in the middle of a one-way street. A pleasant side effect: This naturally drew attention, as the street was blocked. Usually, annoyed drivers would wake up the neighborhood by honking, because the Kadett was blocking their way. This at least ensured that it wouldn't go unnoticed for long.

"Kill switches" are, in my opinion, rarely comfortable and difficult to conceal. I had a potentially useful idea when I saw a later model VW Jetta. I took the existing fog light switch to interrupt the fuel pump relay. Hardly anyone notices whether a vehicle has fog lights or not - especially not a car thief!!

The switch was located in the instrument panel, where it belonged! Visually, it was completely inconspicuous, and the switching power is more than sufficient for the power requirements of a relay. Similarly to the Kadett, all the lights worked, the starter motor functioned, and the engine briefly started. For troubleshooting, a car thief doesn't have time! His ideal scenario is a car that starts and runs perfectly...

flightmaster hat folgendes geschrieben:

Simply remove some fuses (e.g., MSG) and try to see which one causes the car not to start. GOOD!!! Insert the switch into the line -> DONE.

Please do not remove fuses, as this may cause errors in the speedometer

That's exactly the problem, I've already encountered this! And then nothing worked without VAG-Com...

Does anyone have an idea which fuse to remove without filling the error memory?

So, you shouldn't pull the stalk for the speedometer, as it will cause a CAN-Gateway to pass through and cause a lot of errors. :wink:

VAG-Com should be in every DIYer's toolbox, and for the rest => just try it out

Hi,

Shortly after the change, we did the following (the Passat has been in the press for so long, and this approach is now less relevant (see below), so it can be written):

Install a stable relay in the power supply line for the ignition, so that the organ still works, but nothing else happens.

For sniping, we took the horn and modified it so that it no longer honks without being activated. Instead, the activation switch sharpens the device. For defusing, which is the more interesting part, we installed one of these small power sockets next to the lighter, just like they had in the Trabi (there was no lighter in the Trabi, but only this other socket, I don't know the correct name). Back then, it was inconspicuous, as there were still plenty of devices available to use in the new countries. Today, a second power socket would be more obvious, but who knows...

This socket was connected instead of a switch to the other terminal of the relay: To de-energize, briefly insert a key or other metal object, which is good. NO ONE does this in a power socket...

Of course, it can be adapted; there are plenty of inconspicuous metal parts that you can easily bridge with the key, without it being obvious.

Best regards,

Jan

That sounds pretty cool :D

You don't really think about that.

But it's mainly about kids who want to steal cars, and I think that's a bit much

You've given me an idea! :idea:

I recently purchased a remote control for a G3 from Egedöns for a low price.
Since my remote control has a trunk function that I don't need, I will use it for this project.

The remote control is connected to a relay that switches power - this provides the advantage of invisibility, comfort, and does not draw a constant current.

In order to maintain the functionality, a hidden switch will be installed, allowing you to manually activate the relay in case of a failure of the remote control.

Best regards, Chris

Whoever doesn't have a problem with constantly pulling out a relay should then replace a faulty one, as no one will likely suspect anything.