Diagnostic Connection Problem

[ads81]

Having had 3 relatively trouble free years with a mk1 Galaxy I decided last week to buy a mk11 as well there are however 2 or 3 issues with it,

 

1. air con not working (no great surprise there!!),

 

2. remote key not working,

 

With these problems i thought i'd plug in vag-com to check for codes, however i couldn't get a connection tried all com ports etc but no joy. Afriend called round with a new Snap On computer however same problem there no connection with any module on the car. Checked his computer on the mk1 and his Octavia and it was straight in no issues.

 

So i was just wondering if there was a fuse or relay somewhere that may render the diagnostic port totally useless?

 

Thanks in advance,

 

Adam

[daddyfixit]

Having had 3 relatively trouble free years with a mk1 Galaxy I decided last week to buy a mk11 as well there are however 2 or 3 issues with it,

 

1. air con not working (no great surprise there!!),

 

2. remote key not working,

 

With these problems i thought i'd plug in vag-com to check for codes, however i couldn't get a connection tried all com ports etc but no joy. Afriend called round with a new Snap On computer however same problem there no connection with any module on the car. Checked his computer on the mk1 and his Octavia and it was straight in no issues.

 

So i was just wondering if there was a fuse or relay somewhere that may render the diagnostic port totally useless?

 

Thanks in advance,

 

Adam

 

snap on scanners dont recocognise ford galaxy !!! enter it as a sharan and then select your engine code.

Edited May 16, 2011 by daddyfixit

[ads81]

We tried it as a sharan too it is the AUY engine but we still couldn't get into it with any of the AUY variants selected.

[Mirez]

If none of the control units are resonding then its likely you have something putting a voltage out on the line. The K line is held at 12V at most times and the testing kit will pull it to ground which is the "signal" for all modules on the network to listen for diagnostic communications. To have none of the modules responding means you either don't have a working ground on the OBD connector or the K-Line is being held artificially high by some other device. Do you have anything aftermarket on the car?

[ads81]

not as far as i'm aware it has factory stereo etc, i've just bought the car last week from a private seller 100 miles from here. the locking etc is a factory key, no handsfree kits or tow bars or anything like that. suppose pulling the stereo out wouldn't be difficult for a trial.

[ads81]

Mirez I think you could be onto something with the K-line, after fitting an aftermarket stereo in my outgoing Passat B5.5 the remote locking stopped working I pulled the electric aerial wire and all was good afterwards. I've just been out now and pulled the stereo out but it's not making any difference. Would you happen to know of other causes of this problem. I'm going to email the guy i bought it off and see if the locking stopping working coincided with anything else - climate control starting flashing etc. Would anyone Know if these cars have a comfort control module as in a Passat as i know they can fail, particularly if allowed to swim!!

[Mirez]

No comfort module on these, its part of central electrical unit. The only module that likes swimming on these is the parking controller under the passenger seat.

[ads81]

I checked the voltage between pins 4 & 7 on the socket the voltage was below 7v so by Ross techs guidelines it isn't K-line related.

 

Been through the fuse box all seems good there too.

 

I've updated to vcds 10.6.3 it tries to connect but then hangs and says

 

Controller uses unknown protocol

 

Protocol Keyword $4004

 

I've been digging around on the net in general and read a suggestion on another forum that disconnecting every ecu in turn could be the only way to see what is causing the problem, does this sound feesible?

[biturbo.s4]

arghhh... why wasnt this updated???

very similar problem to mine...