I would like to install a kill-switch as an anti-theft device (either with a button or possibly with a remote control) that disables the starter motor or, even better, the fuel pump.

 

However, I noticed that the keyless ignition system (the one with the button, to be clear) is quite different from the normal key-based systems. In fact, all the engine systems, including the fuel pump (I assume, correct me if I am wrong), are activated when the door is opened, so that when the button is pressed, the system is already primed with fuel. Unfortunately, this prevents me from using a kill-switch on the fuel pump. So, if I’m not mistaken, the only option left is to interrupt the starter motor (the starter motor).

 

Has anyone here already experimented with something similar and can share their experience?

 

To avoid voiding the warranty, I would like to avoid cutting the wires. So, the simplest solution would be to act on the fuses (by replacing them with a custom circuit), but this is also the easiest for thieves to detect. A more reliable but more complex solution could be to dismantle the fuse box and add new connectors to create the secondary circuit. I haven’t dismantled the fuse box yet, so I can’t tell you how feasible this solution is.

 

In theory, I think it could also be possible to act on the fuse that detects the position of the clutch pedal. In fact, if the clutch is not pressed, the starter motor doesn’t turn on.

 

Any ideas or suggestions are welcome.
Thank you.

If you kill either of these circuits when the car doesnt expect them to be, chance are youll throw a lot of fault codes into the system and possibly bring an EML light on.

 

Everything is done by networking now and it is not like an old car where the start button is linked to the starter motor. The starter motor is controlled by the engine ECU via multiple other modules.

 

Your best bet is to go for a ghost immobilizer - tried and tested by many and these modify the network signals sent around the car to prevent fuel/starter/spark or a combination of the above, almost undetectable by anyone looking to quickly steal a car as they can be hidden anywhere with a canbus link (that is the entire car).

Welcome to the forum. 

 

 

Thank you both for your replies. 

 

28 minutes ago, ApertureS said:

If you kill either of these circuits when the car doesnt expect them to be, chance are youll throw a lot of fault codes into the system and possibly bring an EML light on.

 

That would be similar to blowing a fuse or simply removing it. I would also expect to see a number of errors logged in the system. However, once the fuse is replaced, I wouldn't expect the EML to remain on. I had planned to test this by removing one of the fuses, but now I'm a bit concerned...