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No response from controller/too many errors to continue

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Hello,

Ross-tech are looking into this but can't find me on their database at the moment + are asleep now of course ! I am having some trouble with my Hex+Can interface & VCDS 805.3

It has always worked fine but today I can't seem to get into any controllers/run a scan.

The problems started today I was using 805.2 (I think) I have tried it on 2 cars, upgraded to 805.3, unistalled/reinstalled but still no success !

The interface tests OK (CAN not found) but when trying to access a controller it takes a long time then mostly comes up with either "no response from controller" or "too many errors to continue" When I tried to access the stereo it came up as diag on the navi screen but ended up with "too many errors to continue". I also tried using it in generic OBD-II mode which gave limited info then the same error message.

When I do access a module the info seems to be part garbled compared to how I used to remember it (odd characters).

So def seems to be a comms issue, have also tried their beta software same issue.

Any suggestions appreciated !

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Do you have a TV in motion box fitted or anything like that?

What car is this on?

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No nothing like that... Its a MkIV Golf with Satnav retro fitted vagcom/vcds has worked fine for years now no luck on 2 cars/2 versions of software so I am suspecting the cable has gone bad somehow...

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Hmm.. Have you installed the Beta firmware update at any point? I noticed that I had a few comms errors with a B6 A4 not too long ago, but I know I've done the Beta update.

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I had the problem on 805.3 & subsequently tried the Beta (which successfully flashed the dongle firmware) but neither will communicate properly now with 2 (MkIV Golf) cars - will try a neighbours TT at the weekend to see if its all cars I am having the problem with.

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Hmm so it's possible that the Beta firmware could be causing both our problems then? Not 100% sure, just speculating.

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I don't think so as I had the problem before I ran the beta, but it is possible that 805.3 is causing the problem as updated to this before I scanned the car & last time I used it was on 805.2 & worked ?

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Tried a "cold boot" on the car yesterday still no joy ! Running out of things to try now - all I have left now is contact cleaner or do you think this is a bad idea ?

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The plot thickens...

Rosstech have refused to help as I am the 2nd owner of the cable so I did a "roll-back" on my laptop back to 2007 which gave me vagcom 704 so tried this.

Still can't get into the Central Convenience but was able to run a scan at least & got the following errors -

Address 17: Instruments Labels: 1J0-920-xx5-17.LBL

Part No: 1J0 920 926 J

Component: KOMBI+WEGFAHRSP VDO V20

Coding: 05410

Shop #: WSC 00000

WVWZZZ1JZ4D017640 VWZ7Z0C8191658

2 Faults Found:

01336 - Data Bus for Comfort System

80-10 - Single-Wire Operation - Intermittent

01304 - Radio

49-00 - No Communications

-------------------------------------------------------------------------------

Address 19: CAN Gateway Labels: 6N0-909-901.LBL

Part No: 6N0 909 901

Component: Gateway K<->CAN 0001

Coding: 00006

Shop #: WSC 31414

2 Faults Found:

01336 - Data Bus for Comfort System

80-10 - Single-Wire Operation - Intermittent

01304 - Radio

49-00 - No Communications

Which I guess is stopping me getting into the Central Convenience ?

Any suggestions what to do next please ?

1 - Clear errors & see if get into CC

2 - update to 803

3 - any other suggestions ?

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Well, reset the error codes but still no luck getting into the CC Module but everything still everything else scanned OK.

Disconnected the battery for 10 minutes & success can now get into the CC Module too !

Will test it on another Golf that had the same issues tomorrow then try version 805 & report back.

I know this is a bit of a one-man thread but hopefully this may help others at some point

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The plot thickens...

Rosstech have refused to help as I am the 2nd owner of the cable so I did a "roll-back" on my laptop back to 2007 which gave me vagcom 704 so tried this.

That's annoying. Ross-Tech have refused to help me before (and I wasn't the second owner of the cable) which really made me lose confidence, the product is great but so far I haven't had a good experience of the support :(

Going back to your car.. it sounds like you have a broken CAN wire somewhere. Finding that will be a nightmare and I guess it may be best to employ an auto electrician to do it as they'll be much better at reading the schematics.

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Yes, was disappointed as have always recommended people buy from Rosstech rather than use the shareware version & was totally refused support not even offered to buy a licence etc.

Back to the car, cleared the error so will see how things go I think its only the instruments that use CAN so maybe not impossible to trace but agree sounds like a job for an auto-electrician with a good sense of humour... Radio should not communicate as is a navi unit but car originally had DD CANbus stereo !

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Which sort of navi unit? Have you checked the wiring harness? If you're using an aftermarket radio there is a chance that the CAN wires on the head unit are currently wired to places where they shouldn't be!!

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Its been OK for a few years but could be worth a look as has to be the favourite I guess if the error comes back...

Its a VW MFD but had to pick up ignition from key, speed sensor from dash & illumination from the light switch as original feed was Can-bus into a Double Din VW Delta Stereo (ie had to convert from quadlock to ISO plugs if that makes sense ?

I later connected the CDC up (needed to cross wire an adaptor up), phone & also the K-Line to see if would make diagnostics work but no joy...

Am pretty sure Can H/L aren't connected anymore but if you have any suggestions can easily take out & have a look might disconnect the K-Line as doesn't seem to do much ?

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Not seen an MFD up close but as they're meant to display nav instructions and radio info in the dash display (with a compatible dash) then I'm sure there's meant to be comfort CAN to the MFD although I could be wrong.. you probably know more about that than me.

Are you sure the K-Line is connected to the right place?

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Thanks for thinking about this for me !

It has a 26 pin connector that carries Gala signal, Reverse & Can -/Can + to the dash but as I only have the 1/2 height dash display I only have Gala & reverse wired in there.

The K line I took out of the black ISO connector to Pin 7 of the OBD connector in an attempt to get vag-com to talk to the MFD but I think it just removed a nav no comms error or something (didn't really do much)

Does that make sense ?

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So where are the CAN wires now that used to be connected to your old HU? Are they currently unconnected?

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Sorry took a while had forgotten how tricky it was to take it all apart ! Yes that's correct none of the CAN wires are connected. To summarise as its very confusing

MFD has 26 pin connector with pins for Can +/Can- these could be connected to a TMC module but as I don't have this so only feeds into the 26 pin connector are Gala (from the instruments) & S Contact from the ignition (took a while to find the correct wire that cuts when key is removed rather than ignition live).

There are only 3 wires (+ speakers) taken from the original quadlock these are ground, positive & safe. There is a Can +/- (not wired in on my adaptor) that could feed different pins of a TMC module if I had one/added the wires.

Hope this makes sense !

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That makes sense, didn't realise they were the type that needed the TMC module.

Annnyway.. it sounds like I may have gone off on a tangent, as if they are disconnected then it won't be that.

It sounds like a simple broken wire on the CAN but finding it is going to be a nightmare :(

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Thanks, was originally going to go for TMC + a cluster upgrade but decided was too much work/expense for the luxury of seeing nav commands in the DIS display.

Will see if the error shows up again before I worry too much about it I haven't broken into the CAN system so don't even know where to start looking...

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