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Model specific boards => Golf mk4 => Topic started by: Terryturbo on 26 April 2014, 16:11

Title: Obd port
Post by: Terryturbo on 26 April 2014, 16:11

I have a problem with my obd port it won't read any scanners it comes back not found and I've noticed when I switch my ignition on there is no management light I've checked all my fuses the port powers up the scanner just won't read it any ideas thanks

Title: Re: Obd port
Post by: dom on 26 April 2014, 17:11

Do you have an after market head unit?

Title: Re: Obd port
Post by: MoMartin on 26 April 2014, 17:14

I think I've read somewhere that the engine management light is disabled / will only come in if it's a severe breakage.
And what kind of old scanner are you trying? Because the older agu engines have an ecu that don't connect to some obd scanners (such as the bluetooth obd2 scanner)

Title: Re: Obd port
Post by: dom on 26 April 2014, 17:22

Quote from: MoMartin on 26 April 2014, 17:14

I think I've read somewhere that the engine management light is disabled / will only come in if it's a severe breakage.
And what kind of old scanner are you trying? Because the older agu engines have an ecu that don't connect to some obd scanners (such as the bluetooth obd2 scanner)

1. All AGUs are readable by OBD port.

2. AGUs don't have an engine management light - maybe what you're thinking of?

My money is on the K-line in the wiring harness being used by an after-market head unit, therefore stopping the reading from communicating with the ecu.

Title: Re: Obd port
Post by: Terryturbo on 26 April 2014, 17:28

Thanks, so can't I just disconnect the head unit then

Title: Re: Obd port
Post by: Bandit127 on 26 April 2014, 18:22

Have a good read through this:
http://www.ross-tech.com/vag-com/aftermarket-radio.html (http://www.ross-tech.com/vag-com/aftermarket-radio.html)

It should answer your questions.

Title: Re: Obd port
Post by: dom on 26 April 2014, 18:36

Quote from: Terryturbo on 26 April 2014, 17:28

Thanks, so can't I just disconnect the head unit then

No, you need to pull the pin from the wiring harness that is connected to the k-line.

Title: Re: Obd port
Post by: MoMartin on 26 April 2014, 19:29

Quote from: dom on 26 April 2014, 17:22

Quote from: MoMartin on 26 April 2014, 17:14

I think I've read somewhere that the engine management light is disabled / will only come in if it's a severe breakage.
And what kind of old scanner are you trying? Because the older agu engines have an ecu that don't connect to some obd scanners (such as the bluetooth obd2 scanner)

1. All AGUs are readable by OBD port.

2. AGUs don't have an engine management light - maybe what you're thinking of?

1. Yeah, i know, but i meant that some tools wont work, like the bluetooth obd2 scanner. - well atleast it doesn't work on mine haha

2. and yeah, i knew i heard something along those lines.

Title: Re: Obd port
Post by: Wazzzer on 26 April 2014, 20:55

It's to do with the type of OBD used on AGUs; it's the early type so no it's not compatible with bluetooth units

Title: Re: Obd port
Post by: viperjsy on 26 April 2014, 21:53

hi I have this I use on my golf gti agu http://www.ebay.co.uk/itm/221117612438?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch%2Fi.html%3F_sacat%3D0%26_from%3DR40%26_nkw%3D221117612438%26_rdc%3D1