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BlackT
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« on: December 05, 2020, 08:37:19 AM »
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I recently bought allroad MY 2001, I have manage only once to connect with VCDS, but only when car was off.
Now it is not posible, VCDS show K-line short to ground
With many may tries i have manage to read cluster PN but than no response from controler. Also LED on VCDS cable blink with red color(on other cars it glow green LED)
I tried to put on OBD plug ground and 12V from some other place of car but without progress.
Car have many equipement, I suspect that some module is interupting K-line. But how to find witch one? Is there some familiar error with some of modules?
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nyet
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« Reply #1 on: December 05, 2020, 12:04:55 PM »
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Why are you taking pictures of your screen instead of using screen shot?
And wtf is up with a portrait picture of a screen? bizarre. Please, show some attention to detail. You've been here long enough to know better than to take shortcuts and be sloppy.
Also, try a dedicated kline to rule out any other issues.
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« Last Edit: December 05, 2020, 12:06:44 PM by nyet »
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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macxxx
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« Reply #2 on: December 06, 2020, 04:47:06 AM »
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first check if there is a aftermarket radio - usually there is some short circuit to K-line in connections
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BlackT
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« Reply #3 on: December 06, 2020, 07:18:45 AM »
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Why are you taking pictures of your screen instead of using screen shot?
And wtf is up with a portrait picture of a screen? bizarre. Please, show some attention to detail. You've been here long enough to know better than to take shortcuts and be sloppy.
Also, try a dedicated kline to rule out any other issues.
I am posting from mobile phone, so don't have screnshots from PC. Also my internet connection is realy realy bad(slower than dial-up) so it is really hard to post. Sorry for that, when I get home I will fix it first check if there is a aftermarket radio - usually there is some short circuit to K-line in connections
As far I can see everything on car is OEM |
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macxxx
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« Reply #4 on: December 06, 2020, 09:39:19 AM »
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Check voltage on kline
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BlackT
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« Reply #5 on: December 06, 2020, 10:46:00 AM »
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Check voltage on kline
That was first what I checked, it is stable |
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nyet
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« Reply #6 on: December 06, 2020, 10:49:54 AM »
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start with a dedicated k line and go from there
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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BlackT
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« Reply #7 on: December 06, 2020, 11:08:52 AM »
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start with a dedicated k line and go from there
What you mean by that dedicated k-line? |
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nyet
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« Reply #8 on: December 06, 2020, 11:10:14 AM »
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1) does it work on the bench
2) if so, run a dedicated kline from the obd connector in car directly to the ecu
if that works, you have a harness issue
if neither works, either your ecu is bad or your cable is bad
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« Last Edit: December 06, 2020, 11:12:56 AM by nyet »
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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BlackT
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« Reply #9 on: December 06, 2020, 11:14:29 AM »
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Yes that is my plan also, even I am 99% it will work on bench. In that way I will only test that ECU is fine. But I need full diagnsotic on car
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BlackT
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« Reply #10 on: December 07, 2020, 02:59:23 PM »
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I cut K line from cluster and connect it to obd port. Now I can connect to cluster and ECU. Cluster show comunication error with telephone modul. So that is where I will start. I will find telephone module, unplug it and see what will happen
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macxxx
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« Reply #11 on: December 07, 2020, 04:08:25 PM »
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it should be in passenger footwell , under the carpet , almost on the firewall
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BlackT
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« Reply #12 on: December 07, 2020, 05:08:50 PM »
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Under carpet: TCU is in front of pasaanger seat, ESP control unit is on firewall( in front off legs) and that is all I can see on passanger side...
I see something brown under arm rest, behind gearbox lever. But it is hard to get it to that module, but it could be that what I am looking for
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macxxx
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« Reply #13 on: December 07, 2020, 11:39:38 PM »
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Yes but if you have that brown telephone module in centre console then it has no diagnose connection so its not it.
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BlackT
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« Reply #14 on: January 14, 2021, 06:20:23 AM »
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it should be in passenger footwell , under the carpet , almost on the firewall
You were right, I have looked on same car on yunk yard, and didn't have this module. But my car does, big Nokia module full of corosion. Now K line is free |
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