1.8t diagnostics in mk2 golf

I was just wondering if anyone on here has used factory management in a mk2 and has a working diagnostic port without using the donor cars clocks?

 

Yep i have. You need the immobiliser defeated so the ecu doesnt kick up a fuss about not seeing the clocks or ignition barrel or key if your not using them either. When the loom is modded the diag port can be retained in the mk2.

Pm Andyout on here, he can hook you up.

 

Thanks Mush, I have the car up and running and the wires sorted for the diagnostic but haven't connected them yet. Immobiliser was deleted so I may just suck it and see..

 

I have an AGU ECU in my mk1 and have the diags working, i connected pin 19 from ECU to pin 7 of OBD, K-Line.

 

I have 3 wires hanging, and connect them to the VAGCOM cable, and I can see everything correctly as well.

 

I have it wired but no computer to check. Here's where I put it, I didn't want any wires hanging around;

 

I like that ^^^^ nice tidy solution

 

Thanks, it's the socket part from the s3 tiger sealed in. I thought it was a good idea anyways!!

I'm running an apy but think it is 43 I connected to, grey/white. I'll check the car tomorrow.

 

Definately not always, mine is a CG off an AGU and if I connect pin 43 to vag-com it stops the ECU from working, wont prime the pump or start.

I had to use pin 19, which would normally be the connection to the dash.

 

Am I right to use pin43 then? I'm waiting for vagcom but got a lend of a snap on code reader to clear faults but got the same sympthoms as boraboy. Car wouldn't start, woldn't prime, I got ****ed off. Disconnected the battery and went in for tea, came back out and connected the battery and away she went first turn?

 

Found some info that said you put 12v to pin 43 for reprogramming via OBD using an intermediate lead








eire20vt, pin 19 of ECU to pin 7 of OBD plug

 

Thanks for the info lads, I'll post up when I get it up and running.

 

That looks spot on

Just what i'll be looking to do with mine.

Need to find the port and loom yet though from a donor AGU Mk4 or A3.

Also, is it true the AGU cannot be remapped through the diag port ? It has to be plugged directly into the ECU itself ?

Cant see it myself but have read it today on uk-mkivs. ...

 

for mine i used a saab diagnostic port as it as the easiest to mount as it comes with suitable screw holes so you could mount it anywhere u like

 

This is true early ones need mapping directly through ecu, as can't do through port

 

Cheers for getting back

So im guessing the saab ports are the same as the vw/audi ones then ?