Black OBD plug - no 12v?

[philj]

Desperately need to get this ecu immobilized, but I can't seem to get vagcom working at all. Did work, now doesn't.

I've got 4 usb obd cables I've tried, eventually found a card reader that runs off the black plugs power and it wouldn't turn on. Had a look and there is nothing coming through.

So, where does it take its power from? IE where would I have to trace it to? Could it just be a fuse?

Could I be pikey and just give it 12v volts straight from the battery? Assume the other is an earth? Car runs, just badly so the ecu has power...

Cheers

[mcandmar]

I cant remember which fuse off the top of my head but i think its shared with the after run pump. Basically check them all as i dont think its one of the main two ecu fuses under the red cap. The fusefox cover should give you a clue..

[philj]

Didn't think they were fused, but yeah its the one clearly marked diagnostics.

[Val]

fuse #21?

page 38/57 from http://www.s2central.net/S2_Schematics/ABY_Wiring.pdf

[UrS4boy]

fuse #21? page 38/57 from http://www.s2central.net/S2_Schematics/ABY_Wiring.pdf

Wow. I am humbled. Don't ever remember seeing that pdf before. *THAT* was a shed load of work to complete and didn't simply fall off the back of a passing lorry.

Kudos as ever to Paul N. (wherever he is).

[andyg plym]

Desperately need to get this ecu immobilized, but I can't seem to get vagcom working at all. Did work, now doesn't.

I've got 4 usb obd cables I've tried, eventually found a card reader that runs off the black plugs power and it wouldn't turn on. Had a look and there is nothing coming through.

So, where does it take its power from? IE where would I have to trace it to? Could it just be a fuse?

Could I be pikey and just give it 12v volts straight from the battery? Assume the other is an earth? Car runs, just badly so the ecu has power...

Cheers

Mine is dead too