What? and Why?

[t-tony]

I have removed the "lid"of my OBD socket to have something permanently plugged in. In the lid is what I assume is a resistor which connects some of the pins when it is closed. Can anyone please tell me what it does and why it's there?

Would it's removal have any adverse effect on the car or systems?

Tony.

 

[Antm72]

"The resistor is there to "complete" a bus circuit for diagnostics when the factory tool is connected to the round 20-pin connector under the hood.
Therefore, the OBD2 cover must be closed when using the 20-pin OBD connector."

Found on a couple of forums its to do with testing in a can bus circuit apparently but it does not have appeared to have affected others that have it now taking resisidence in the glove box.

 

[Antm72]

Although saying that some say they have no port under the bonnet ..
But it was quoted from a BMW Forum
Everything on line is true isn't it

 

[Bozzy]

It stands for "old boy detector" so you need to leave it plugged in .

 

[Paul Rice]

If you don't know @t-tony, doesn't give us mere mortals a chance.