Audi 80 Diagnostic Plug

[tacuari]

Hope someone can help me in the following.

I own a 1990 Audi 80 Quattro 1.8, which I bought from new. The car is a left-hand drive left-hand drive export model.

Can anyone please tell me where the diagnostic plug is located? I recall that many years ago I sat inside the car with an Audi technician when he accesed it, but I can't remember where he plugged his equipment.

Any help would be most appreciated.

Many thanks.

[Brycie]

I have absolutely no idea on your specific model, but mine is above the accelerator pedal. You do have to get right down & crane your neck to see it, so if yours is in the same place, that may be why you've not spotted it already.

[zollaf]

i would presume it is in the fuse box, where most (possibly all ) 80,s had them. its not a 16 pin obd socket though but is 2 sockets, both with 2 pins, one is black, the other is white and you will need the correct lead to connect to it.

[tacuari]

Many thanks. I checked the fuse box but alas no luck. I recall that an Audi technician did a diagnostic inside the car but I can't find anything inside either all though I did find a red socket not connected to anything.

[tacuari]

Many thanks. I had a look above the accelerator pedal but could not spot anything. I don't know if being left-hand drive makes any difference. I also checked the other side but couldn't find anything there either. I did find a red socket not attached to anything but not sure what it is for. It is the quattro version so not sure if that makes much difference.

[Guest 2]

Try popping a few panels off such as the 12v and other bits around the handbrake .. It can be in some odd places in the older cars.

[zollaf]

http://www.google.co.uk/imgres?q=audi+80+diagnostic+socket&hl=en&sa=X&biw=1024&bih=677&tbm=isch&prmd=imvnsfd&tbnid=VIC6tNIhdvBL5M:&imgrefurl=http://62.129.226.18/prnd.biz/advice/plug.htm&docid=QnUXlXYOuQKb7M&imgurl=http://62.129.226.18/prnd.biz/advice/wtyczki/Audi-80-B4-1994.jpg&w=850&h=487&ei=J3PKT6TMF5CA8gP7lfToDw&zoom=1&iact=rc&dur=547&sig=102690077428554760778&page=2&tbnh=107&tbnw=187&start=12&ndsp=17&ved=1t:429,r:6,s:12,i:113&tx=91&ty=59

[tacuari]

Thanks for the responses. Unfortunately I have tried all the obvious places including the fuse box but I am still unable to locate it. Any further suggestions would be most welcome

[scotty33]

It wont be in the fuse box on a 1990 model this came in with the b4 shape.

Usually the plugs have a 'dovetail' shaped receiver and clip onto The edge of a trim panel under the dash. As stated above, just above the accelerator pedal. Not sure this would apply to a lhd car? Not all injection engines have the facility, what engine code do you have? What fault are trying to track down?

[tacuari]

scotty33

Many thanks. I used a mirror and torch to get a look above the accelerator pedal, but could not find any plug. Also looked on the passenger side. I vaguely remember that about 10 years ago, the Audi technician undertook a diagnostic inside the car but did not see where he connected his equipment. The reason for wanting a diagnostic examination is two-fold. First, the car is suffering the usual cold start problems. My local Audi dealer reckons it is the warm up regulator. I have sourced a second hand part so will see if he is right. The other reason is that as it is a long time since the car was hooked up, I thought it would be a good idea to check that all is well and the timing etc is ok.

[scotty33]

If it helps, you may need to remove the trim panel/shelf from under the dash, The plugs may be hidden in the 'spaghetti' this reveals.
The plugs (if they exist), should look like these in this Audi 100 link:

http://www.sjmautotechnik.com/trouble_shooting/100ecuf.html

It also details the use of a homemade test light, which you may need, as many early inj systems do not communicate with modern fault code readers, even if an adaptor lead is used. Audi used VAG tool 1551 for reading codes back in the day, as far as I know, it is essentially just a test light.

[tacuari]

Hi scotty33,

Thanks for the info. I will cerainly try your suggestion although I am not sure of the best way to remove the trim. An ideas as to how it is fixed to the car?

[scotty33]

There are 2 or 3, 8mm (I think) hex headed screws which are obvious, there is another screw deep in a recess alongside the bonnet release handle - this one needs a 1/4 drive socket or something equally slim to access it. The front edge just slides into receiver 'forks'

[tacuari]

Thanks again. I am away for a few days but will give it a go when I get back. You would think that they could have designed this a bit better....

[scotty33]

Thanks again. I am away for a few days but will give it a go when I get back. You would think that they could have designed this a bit better....

I'm sure if they wanted owners to work on their own cars, they would have!

[Zenerdiode]

Try under the gear-stick boot...