biturbo.s4 Posted July 23, 2012 Report Posted July 23, 2012 hi all,just recently bought a 2001 sharan tdi at a bargain price.having a few problems getting the diagnostic port working. first of all vagcom wouldnt connect so checked power to pin 16 and nothing... took a live feed from fusebox to this pin which allowed my laptop to connect but showing now k1 open or short to ground?will copy in what it says here later... anyway, also have no radio, and instrument display is also tempramental. the needles stick after you turn off the engine, and do some other strange things too.. sorry ive just posted this quick, if any of it doesnt make sense its because im on,my phone... thanks in advance,Tony Quote
alan_131 Posted July 23, 2012 Report Posted July 23, 2012 This topic http://www.fordgalaxy.org.uk/ford/index.php?/topic/24213-vag-com-doing-my-head-in/ has some discussion on vcds connection problems caused by no power to the socket. It's about a mk1 so some of the content won't apply but some of the links might be helpful. . . Good luck, be interested to hear what it all comes down to. Quote
biturbo.s4 Posted July 23, 2012 Author Report Posted July 23, 2012 Hi Alan, thanks for the response!Have been reading through a lot of older threads and its nice to see the help you have given to people in the past. Search on here is unsuccessful, and that thread i have Looked at but isn't conclusive.. If i give power to pin 16 it still won't connect although it then stops me getting the not plugged into car message when i test...There are two data lines. I get k1 short to ground. K2 ok.I have vcds 10.3. Checked and working on my audi, and have also tested with elm327 Bluetooth adaptor which will connect if pin 16 has power but limited functionality. I have fusebox pulled out as far as it will go and nothing is a miss... I wonder if the loom is chafed somewhere behind dash... Symptoms on the electrical side are...Clocks stick at points they where at when ignition is turned off. And on restarting ignition they jump back down to resting positions very jolty and hesitant. Also temp gauge fluctuates either side of 90 and fuel gauge erratic too. Lcd display faded and hard to read.Radio lights up but has no power too... This works fine in my mrs lupo.And obviously obd port not working too. This was as far as i got last night... Think clocks out tonight, then maybe dash? Oh and the white smoke when cold, but im dealing with one thing at a time! Thanks again Tony Quote
biturbo.s4 Posted July 23, 2012 Author Report Posted July 23, 2012 After 48 pages of reading the technical section it may be down to airbag controller?Airbag light is on on dash... Maybe a knackered controller shorting out the k line? Anyone know where it is located? Thanks! Quote
biturbo.s4 Posted July 23, 2012 Author Report Posted July 23, 2012 Found it... Behind centre console for those that need to know...Disconnecting it got the test in vagcom to show k1 and k2 both ok and ready but getting no response from controller whatever module i scan... Any ideas anyone? Tia. Tony Quote
biturbo.s4 Posted July 23, 2012 Author Report Posted July 23, 2012 ive no idea what to try next... Quote
alan_131 Posted July 23, 2012 Report Posted July 23, 2012 (edited) Thank you for the kind words but I'm largely just parroting good advice given by others in the past. I'd be thinking just pull the cluster and reseat the connectors if it was just the dash, and also check any visible earth points. Given your wider ranging issues I'd probably still do that just to get it out of the way... I've seen posts where people have had strange happenings in the past due to blown fuses, dud relays, shorts - tailgate wiring for example, and so on. Is the radio an aftermarket unit (maybe not if it works in the Lupo?) This topic on another site might be interesting http://forums.vwvort...d-some-guidance Proving the cable works in your Audi is a big step forward, and the change with the abs controller disconnected is interesting (see the topic on vwvortex above). Depends a bit on if your cable just links all the lines together then looks at them, or has some smarter arrangement. Never simple! I think others will learn from your work... If you can't find a cause for everything, then might be worth working backwards from a known fault. Seem to recall somebody having problems due to the loom near the obd socket itself. There's many others on here far more knowledgeable than me, and you'll probably find somebody makes a better-informed suggestion very soon.Good luck. Sorry - started reply a while ago so a bit out of synch with your posts Edited July 23, 2012 by alan_131 Quote
biturbo.s4 Posted July 23, 2012 Author Report Posted July 23, 2012 pins 4 and 16 show over 12 volts on my audi even with ignition off... on the sharan show 0 even with clocks, airbag controller, abs unit unplugged. in fact, whole lower half of dash out, so pretty much everything unplugged... cant for the life of me work out how to measure current draw on battery. pretty stuck now. can engine ecu be dead even though car starts and runs? Quote
biturbo.s4 Posted July 23, 2012 Author Report Posted July 23, 2012 what other modules can i pull to see if theres any difference?is there a convenience unit that controls the interior? Have been fiddling with all wires i can get my hands on to see any change in voltage at obd port and nothing... clutching at straws now :25: Quote
SilverBeast Posted July 24, 2012 Report Posted July 24, 2012 (i) Remove the radio if you haven't already. I've read several threads where an aftermarket radio has interfered with the diagnostics.(ii) Check the cables on the battery, apart from the two big fat horizonatlly challenged wires there should be at least one directly off each terminal.(iii) Look at this -->thread<-- post 5 about earths on the multiconnector. The whole post might help.(iv) Outside chance door/hatch gaitors wiring has been known to screw up many things. As they are twist plugged on you may be able to just disconnect them and check. Quote
biturbo.s4 Posted July 24, 2012 Author Report Posted July 24, 2012 car came with no radio... looked to have been aftermarket previously as a few of the wires had been joined... reverted to standard wiribg and the vw gamma cassette player from the mrs lupo doesnt work... red led flashes with ignition off but wont switch on. havent looked deep enough at this yet. one of the smaller earth wires on battery was snapped. so i have replaced that. regarding that thread... i have read it a few times not sure what multi connector he is talking about. inly round cobnector Quote
biturbo.s4 Posted July 24, 2012 Author Report Posted July 24, 2012 bloody phone!!! only round connector that i can see runs to injector loom?? And good shout on door gaitors, will be checking those tonight!!! Do you know what other modules i can pull? couldnt find central locking unit...Many thanks fir your help. Quote
biturbo.s4 Posted July 24, 2012 Author Report Posted July 24, 2012 :40: Still nothing. Checked all door gaitors, and one had been repaired previously, but nothing wrong with any of them. And besides, central locking works and so do leccy windows. Removed battery and checked earth straps underneath, and all good. Also had a nose at wires into and out of ecu and no problems. Opened ecu up for signs of water damage and nothing either. Then pulled every fuse while multimeter on obd port and no change, 0.00 at all times. Im stumped now :( At least on the upside i gave her a well deserved wash, and also removed egr ready for cleaning. Will remove inlet mani tomorrow too :) Anyone anything else i can try?? Quote
alan_131 Posted July 25, 2012 Report Posted July 25, 2012 I don't think your ecu can be dead if the car runs, because the PD is electronically timed unlike the mk1s which are more mechanical with electronically adjustment. Not to say that the diagnostic interface isn't stuffed though. As I understand it, the diagnostics from the different controllers are multiplexed somehow, maybe by each controller monitoring all traffic and sharing a common cable or a single (the ecu?) having connections from each controller and doing the multiplexing - don't know which applies here. You can see why this could stuff things up when either wiring or dud device is doing things to the outputs. I think you might find following pin 16 back to discover why it has no power might help (easy to say). Presumably the new haynes mk2 will have wiring diagrams or maybe TIS or somewhere on here perhaps? (Powering 16 (battery +) from the fusebox will give your interface power, but does this normally come direct from the fusebox or is it via the ecu/some other stepping point that might be related to/help diagnose the problem?) On my mk1, the diag socket has only 4 connections populated - 4 (chassis GND), 5 (signal GND), 7 (K-line) and 16 (Batt +).16 > 4 shows approx batt voltage at all times7 > 5 shows about 10.5v ignition off and 11.5 ignition on4 > 5 shows resistance of about 3 ohms BUT all of these were measured using makeshift probes into the socket and this could be due simply to poor contact/surface coatings on the probes. Experimenting today I found that, with the cable connected to the car and laptop, it would pass the (vcds-lite 1.0,Vista) connectivity test on com3 but could not access any controllers. (been messing about with virtual com ports for other reasons). It showed a very poor latency (> 26ms), this might have been the reason, maybe not....Changing to com4 (around 11ms latency, also I clicked apply this time before saving) worked fine.Another oddity to think about.... Quote
biturbo.s4 Posted July 25, 2012 Author Report Posted July 25, 2012 hi again alan, thanks for your input. i think tonight i will try and trace the wires back... what other modules have a k line running to them do you know? thanks mate, really appreciate your help... Tony Quote
biturbo.s4 Posted July 25, 2012 Author Report Posted July 25, 2012 Tried tracing wires back, grey/white k line connects into a bunch of lines above fusebox. Couldnt go much further, red/white pin 16 live runs right into loom. Can anyone else assist me? Very close to calling wire wizard out at 60quid an hour! :40: Quote
chrispb123456 Posted July 26, 2012 Report Posted July 26, 2012 Do you have 12 volts at fuse 30 to 32 contacts with ignition on, don't know if you have already tried this. Quote
alan_131 Posted July 26, 2012 Report Posted July 26, 2012 Gray/white stripe as per your post is generally vw diagnostics. Your instrument cluster has a controller, autobox if you have one, aux. heater, etc. I don't know what functionality that used to be separate has migrated to the main ecu - maybe none, but immob? c/l? Presumably (I haven't seen one) the mk2 manual has its usual wiring diagrams - ie not as good as manufacturer but a good starting point. Mirez has mk2 fuse info on his site http://www.mirez.co.uk/Galaxy/f&rinfo.html Do you have anything else that doesn't work? Realise how frustrating this must be for you. It really bugs me that manufacturer's don't supply full information when you buy a car. Quote
biturbo.s4 Posted July 26, 2012 Author Report Posted July 26, 2012 Do you have 12 volts at fuse 30 to 32 contacts with ignition on, don't know if you have already tried this. Will check these now, and get back to you. Gray/white stripe as per your post is generally vw diagnostics. Your instrument cluster has a controller, autobox if you have one, aux. heater, etc. I don't know what functionality that used to be separate has migrated to the main ecu - maybe none, but immob? c/l? Presumably (I haven't seen one) the mk2 manual has its usual wiring diagrams - ie not as good as manufacturer but a good starting point. Mirez has mk2 fuse info on his site ... Do you have anything else that doesn't work? Realise how frustrating this must be for you. It really bugs me that manufacturer's don't supply full information when you buy a car. I know grey/white is K line, Has been like this since about 1992 with Vw. Converted two mk2 golf's to run Vr6 engines and have fitted both with OBD ports. One K line, and one ground, one live. Aux heater - Any idea where the controller is located?I know immobiliser is keyed into clocks and ecu, and transponder box. Transponder box then has the little chip reader that sits around the barrel plugged into it. All of these can be recoded with vagcom.Ive had ABS - AIRBAG - CLIMATE all disconnected with no difference. Quote
biturbo.s4 Posted July 26, 2012 Author Report Posted July 26, 2012 Have just checked - Disconnecting the connection at Auxiliary heater made no difference. ........................ FUSE's 30, 31 + 32 all have over 12v with ignition on. K line shows 1.6v with ignition off and 10.5v with ignition on, is this correct?? Quote
chrispb123456 Posted July 26, 2012 Report Posted July 26, 2012 Have a check on the splices under the passenger seat or the A pillar changes made at 5/2001 there have been issues here before may not be your problem but worth a look. Quote
biturbo.s4 Posted July 26, 2012 Author Report Posted July 26, 2012 Right well ill whip the passenger seat out and have a look... What where the A pillar changes?? Are they above by windscreen, or below down near where the door wiring goes through bellows - I think mine was built FEB 2001 so maybe pre these changes? Anything else I can look for?? Quote
chrispb123456 Posted July 26, 2012 Report Posted July 26, 2012 It's floor level, yours being early 2001 then should be A pillar this only refers to the location Quote
biturbo.s4 Posted July 26, 2012 Author Report Posted July 26, 2012 So under the plastic kick covers to the side, say where the bonnet release handle is screwed in?? Quote
biturbo.s4 Posted July 26, 2012 Author Report Posted July 26, 2012 And thanks again for all of your help! Will promise to frequent this forum regularly and try and help others!! Quote
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