[SpeZ]

Originally Posted by weekend_cruiser

FYI, the OBD device they are using might be self powered. OBD devices either get their power from the OBD port or the OBD device will provide it's own power. The power from the OBD port is vehicle battery connected and not switched. Usually advanced or fancy OBD devices that tend to draw a lot of current will provide their own power.

Maybe also test with a self-powered OBD device to ensure there is no data communication with the vehicle with fuse pulled. I could be wrong but I don't think the fuse kills the data communication. Some of us are disconnecting the CAN data wires from the OBD port as a safety measure and leaving the power wires connected. There is a thread on this.

I have checked the wiring now. The fuse kills the electricity straight from the battery.
In the OBD connection Slot 16 will be without power.

Usually OBD connectors grab their power from there in order to work.
OBD plugs are commonly connected with a laptop through USB (just like HPTuners).
USB can only deliver 5 volts, this is pretty sure not enough to power and access the car modules.
Of course they could add additional wires to externally power it with 12 volts, but makes the stealing device more complicated.

Funny thing would be to install a dummy OBD which works exactly like those USB Killers, which instantly kills devices when plugged into.


At the end it's a small trick for no costs and should be combined with other theft preventions.