Hi, I have a polo gti 2001 plate and when I try to connect to my ECU via the obd port using either autcom or vagcom it doesn't connect , it says it can't establish communication with the ECU... The port does produce power and it did work previously but now its not working . anyone have any solutions ? I have tried to remove my aftermarket radio as I read it can cause miscommunication with the ECU but that didn't work.

Check fuse # 11

Check fuse # 11

The fuse is fine :/

Anyone else have any ideas ?

Can you communicate with any of the computers (airbag, abs, instruments etc)

Can you communicate with any of the computers (airbag, abs, instruments etc)

No , it produces power through the obd but nothing else :s the car run perfectly so I dont know what it could be as it was working previously :/

There should be +12v on pin 16 grounds on pins 3 & 4 and pin7 is the "K" diagnostic line, all the K lines are joined together in the loom and go to the various ecu's You are trying to connect with the ignition ON ? as nothing will respond without it being on

There should be +12v on pin 16 grounds on pins 3 & 4 and pin7 is the "K" diagnostic line, all the K lines are joined together in the loom and go to the various ecu's You are trying to connect with the ignition ON ? as nothing will respond without it being on

Am trying to connect to the ECU to try to read it but I will not respond even if the car is turned on or if the ignition is on...

Have you had a look at the connector to make sure the pin 7 socket hasn't pushed out of the housing?

Have you had a look at the connector to make sure the pin 7 socket hasn't pushed out of the housing?

I will look at it during my lunch break ! Will get back to you when I can.

From what I can see the connector is fine .... :/

Can you try vagcom on another car?

Can you try vagcom on another car?

Vagcom works on other cars and when I try vagcom I can hear it trying to communication with the instruments but nothing happens....

The only thing I can think to do is disconnect all the ecu's instruments etc then connect one at a time and see if they communicate? to see if one of them is pulling the K line down

The only thing I can think to do is disconnect all the ecu's instruments etc then connect one at a time and see if they communicate? to see if one of them is pulling the K line down

I will try to do that and get back to you as soon as I've done it . thanks for the help so far !

any joy? my vagcom won't talk to my car either, would be good to know how you got on.