2007 Audi A6 - Comfort Network Issue (single wire mode)

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2007 Audi A6 - Comfort Network Issue (single wire mode)

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Күн бұрын

The methods shown in this video can be used when diagnosing network problems, although keep in mind not all networks are the same.
In this video we are working on a 2007 Audi A6, the engine is a 4.2l. There is some history with this vehicle. It was towed to a shop with an ECM "no comm" and would not start. They replaced the ECM and towed it to the dealer to have it programmed. The vehicle now starts and runs but has other faults stored that the shop wants addressed. The fault that we are addressing is stored in the Gateway module, and is 'Combination comfort bus single wire mode'. This video is in hindsight and I tried to get as close as possible as I could retracing my steps. There were some variables that changed this video and I wish I could have done it live, but in my opinion it still turned out good. I hope you guys enjoy this video and thanks for watching.

Пікірлер: 107

@ScannerDanner 6 жыл бұрын

I want to be just like you when I grow up

@PositiveLeadDiagnostics 6 жыл бұрын

I don't blame you

@nemanjadzombic6101 5 жыл бұрын

I'm grown up and would like to be 20% like you. Greetings for the best engine performance diagnostics channel!!!

@jfGarage4k 4 жыл бұрын

Scanner D your always wide and crazy your never gonna grow up lol😎👍 awesome work champ.🏆🏅

@miclewis55 6 жыл бұрын

Good video … Made me smile when you mentioned wet carpets / CAN errors. Over here in UK we have lots of Audis and lots of rain. The waterproof membrane on the back of the carpet often masks the telltale ‘wet carpet’ . On A4/ A6/ Passat you can get 1/4 inch water under the carpet but dry carpet on top ! Don’t forget to clear the scuttle panel water drains before you give the car back.

@faizluxurycardiagnostic1510 2 жыл бұрын

superb completely explained hats off bro

@nandor690 6 жыл бұрын

I love how Audi connectors are so easy to take apart. And how easy it is to get the pins out of the connector if you need to

@fieldsofomagh 6 жыл бұрын

Very interesting diagnosis and easy to follow with all the relevant schematics explained. The low tech approach proved to be a winner, once again. The recoding part was new and your pals at Audi were very co operative. Job well done !!

@rodvan-zeller6360 19 күн бұрын

Great video. Did the diagnostic time charge exceed the value of the vehicle?

@bernardstef 5 жыл бұрын

That's what this disconnect is for! Now I know! Excellent video!

@Enfig 4 жыл бұрын

WOW... This is going to be my new favorite channel.

@shaunsautorepairs5410 6 жыл бұрын

That was great tom. As someone who has recently purchased a pico im getting into canbus and module comunication issues...thanks again

@PositiveLeadDiagnostics 6 жыл бұрын

I absolutely love the pico!

@lane1962 6 жыл бұрын

As always Tom, very educational, and interesting, thank you very much for your great efforts.

@martinguitarhd28 6 жыл бұрын

excellent vid Tommy always look forward to seeing a vid from you .Thanks

@nicknicu1787 6 жыл бұрын

Great video Tom! 👍 The component protection is interesting,we’ve been warned about it for a while but this is the first time I personally see it. It’s only going to get worse IMO and probably not just in European cars. Well done!

@IMFDB 6 жыл бұрын

Seems like Audi’s light years ahead of gm. Gm just started mandating serial data gateway modules in 2017. I believe gm would call the comfort bus, isolated mid speed because it’s isolated from the dlc. Back probing with a scopes probably your only choice. I wonder if the comfort bus uses 2 120 ohm resistors on each end and should read 60ohms normal back probing with all components asleep. That’s cool how u could unplug most modules and not lose communication with half the modules because it’s a series parallel network vs a series network I’m used to working on. Look forward to checking out more of your data com videos. It’s good stuff. I wish you had access to a gm Mdi and data bus tool software. It virtually eliminates the need for a picoscope. Just a slower baud rate.

@fredflintstone8048 6 жыл бұрын

Great no nonsense system diagnostics. I wish some of the other guys who do this on youtube were as good, concise and to the point rather than lots of self aggrandizing chatter. I like the Pine Hollow guy, but sometimes the glare of his halo is distracting.

@billyyoder8171 6 жыл бұрын

Thank you Tommy. Good job. Was the convenience network low speed CAN? I appreciate your videos. You do great work recording and sharing with us all.

@Broey1985 3 жыл бұрын

Great Job. I wonder could you have possibly pulled the can low splice connector and checked for a solid ground signal there at the pins and identify the grounded module?

@haywardsautomotive6156 6 жыл бұрын

Nice diagnosis Tom! You can also check each modules signals at the splice connector after removing the comb. Great video and info on Audi programming.

@PositiveLeadDiagnostics 6 жыл бұрын

I tried that. But when I disconnected the splice connector. There were no messages from the modules except the gateway

@haywardsautomotive6156 6 жыл бұрын

Yes you'd have to activate each module like the door switch module to get a signal. You can jumper the gateway low terminals at the splice and monitor the signal while you jumper the low side of each module and see which one is pulling the gateway down but you had easy access to the BCM and nailed it. Like you said you have to know how the network and how they communicate. Your videos and diagnostics are solid and it's impressive to see how fast your knowledge base is growing especially on difficult vehicles and enjoy watching your videos. You'll probably hardly ever use your Verus lab scope at least that's the way it is with me. I'll use the Pico almost all the time but it's nice to have another 4 channel scope just in case you need more that 4 channels.

@PositiveLeadDiagnostics 6 жыл бұрын

Ahh I see what you mean. Jump the can wires from the gateway to each module separately That would have worked. But woulda required some connection fabrication. Thanks for watching and supporting. I appreciate the compliments and tips

@haywardsautomotive6156 6 жыл бұрын

Yep I made up a few sets of jumpers...saved a lot of time. Keep the videos coming!

@dudeman495 6 жыл бұрын

That can splice connector you pulled out is the most valuable tool in diagnosing these systems quickly. Can simply jump them one at a time watching your scope and then when you see the bad pattern can determine what module it is from a wiring diagram. Works great especially with so many modules and many that are difficult to get to. This video should explain better. kzfaq.info/get/bejne/hrRdrc9805uvgqM.html

@jeremieparker5703 6 жыл бұрын

Nice work Tom you rocked that man..thank u for sharing..

@Livingonthestars 2 жыл бұрын

i have the same code but the issue on this car is the fresh Air blower, It doesnt work at all, could be the same module?

@Livingonthestars 2 жыл бұрын

Good Morning Sir, i have the same code, but the hvac is not blowing Air, could be the same module?

@yam1873 6 жыл бұрын

Great video ....would love to see more from you

@philh9238 6 жыл бұрын

i worked on a 2007 beetle last week with a 400 milliamp draw unplugged comfort module drain went away. was lazy and didnt do any more testing got a new one. same problem. my amp clamp got ran over by my buddy so cut random wires at the module pin 10 on the t3 connector eliminated the drain. said it went to the cluster on a wiring diagram. repaired wires seems to be fixed hasnt been dead in a few days now

@anthonyperrotto4412 6 жыл бұрын

Great video Love all the detail

@diegofrancisco3041 4 жыл бұрын

What laptop should I buy to use with the Picoscope?

@jfGarage4k 4 жыл бұрын

Instead using Picoscope (i dont have) Can i able to use my Multimeter on (org/grn - org/brn) wire at the luggage compt?

@umarmahmood4511 4 жыл бұрын

Great work 👍 respect from across the pond uk Where did you learn all these skills

@ozzstars_cars 6 жыл бұрын

Nice find and fix Tom.

@EXOVCDS 6 жыл бұрын

Did the module have any signs of corrosion inside?

@PositiveLeadDiagnostics 6 жыл бұрын

Surprisingly it did not. I was expecting to see something

@IntradeMotors 6 жыл бұрын

Positive Lead Diagnostics I was going to ask the same question . Do you think the bcm1 could have killed it when it went down or do you think it's because it Hade made in Australia written on it. Was the new item made in Germany?

@nemanjadzombic6101 5 жыл бұрын

Thomas you would just drill a small hole for the water to drain out and screw a bolt so you can drain it out regularilly, wouldn't you ;) ;)

@MechanicTechnicianRepair 6 жыл бұрын

Exselete diagnostic. Nice vidio

@philh9238 6 жыл бұрын

one last thing how do you determine if its the module pulling down the network or an output of the module? just wondering? unplug and jump the com wires with a jumper??

@randygould4109 6 жыл бұрын

com problems realy big now days had a 2003 jetta this week .instrument cluster took the k line down

@joseorellana7952 6 жыл бұрын

gracias por tu video my friend

@paulvw533 6 жыл бұрын

great video thanks for sharing..

@V10PDTDI 6 жыл бұрын

Hi did you try to remove the components protection with a VCDS ? Because I replace a couple of confort module on a MK 6 golf and I was able to unlock the modules I can’t remember what it was called but I was able to recode the module it was a long code type but if the module wasn’t unlocked if I remember right the remote would not work or something else.

@PositiveLeadDiagnostics 6 жыл бұрын

Your thinking of production mode or factory mode on a bcm. I don't have vcds. I could do the coding with snap on. But I needed Audi scantool for removing component protection

@mikeeustice4452 6 жыл бұрын

Nice video on gm you can check the individual module can signals at the splice connector or the comb could you have done that on that vw if the module wasn't accessible. The networks it something else I can't wait to mess around with gm most network its fiberoptics. Nice video

@PositiveLeadDiagnostics 6 жыл бұрын

I have done too many fiber optic issues. They don't seem too difficult

@Pablo_Automotive 6 жыл бұрын

Great job Tom 🔧☺

@ronkis78 Жыл бұрын

Hi. Where exactly is located the bcm the one you fixed. I know there is one under driver seat. But you were talking bcm 2. When is located. Thanks. I have 2007 Audi A6 4.2.

@PositiveLeadDiagnostics Жыл бұрын

I think this one was behind the glovebox

@keanMechanic 6 жыл бұрын

Well do lad like through process

@solojoe9462 6 жыл бұрын

What laptop are you using? I like how you are using the touchscreen. Will any touch screen work like that with the Pico?

@PositiveLeadDiagnostics 6 жыл бұрын

It's an hp laptop with touchscreen. Pico is pc based. So it wouldn't go on an android or apple product

@mariusleo3856 6 жыл бұрын

Nice Tommy! Would it be possible to get waveforms at the "bus bridge" ? I was thinking you might get the communication from each individual module if you disconnected it?

@PositiveLeadDiagnostics 6 жыл бұрын

When I disconnected the connector the only messages I got from that connector were from the gateway

@jdlava8019 5 жыл бұрын

Excellent video - I have same fault on VW MKV Jetta Tdi (2006). Considering the value of the vehicle I’m thinking of leaving it. Thoughts?

@PositiveLeadDiagnostics 5 жыл бұрын

Depends on overall condition of the vehicle I suppose

@Diagnosedan 6 жыл бұрын

Nice Tommy, great work!

@EXOVCDS 6 жыл бұрын

Hi Dan! Would be nice if there was a way to identify modules via the CAN signal (just like syncing a relative compression waveform with an ignition signal) that could have pointed out that module before the signal was shorted (just had that missing packet)... rather than having to disconnect one at a time. With full short up or down, identification obviously can't be done. There must be some kind of communication order... if there is, then disconnecting any 1 module (and knowing what the order is) could help determine which one was missing. I have no CAN / LIN experience, so I have no idea if it's possible... they probably don't all stay awake the same length of time.

@Diagnosedan 6 жыл бұрын

Thomas, of couse when the comm.wire shorts out no communication is possible. But indeed when there were only messages missing from a certain module the other modules can indentify that module. Sometimes you'll get a code like; Missing message from instrument cluster. / Sender Intrument cluster-receiver Gateway (Example). But this varies by, Brand/Vehicle age/ system. When no such codes are stored, i know of no other way than the way Thommy did this one. Unfortunately some modules are hard to reach and this method can be time consuming especially when it's intermittend😥

@EXOVCDS 6 жыл бұрын

DiagnoseDan Thanks Dan!

@haywardsautomotive6156 6 жыл бұрын

Once you disconnect the splice comb you can check CAN hi & lo from the terminals and check each modules signals vs. disconnecting each module only sometimes you have to be a contortionist and it's easier to disconnect. For the modules that are hard to access it's easier at the splice...sometimes.

@EXOVCDS 6 жыл бұрын

Thanks for the tip!!

@timjkiely 6 жыл бұрын

Brilliant

@Kenondatrack 5 жыл бұрын

You’re the shigznic amazing

@vitaly_vasilev_2012 5 жыл бұрын

Спасибо.

@DylanRabier 6 жыл бұрын

Just a question Tom. So the 2 wire (can high&low) goes to single wire mode? Is this a VW/Audi strategy.

@risoto2311 6 жыл бұрын

Single wire is a LIN

@DylanRabier 6 жыл бұрын

Not only LIN.

@Diagnosedan 6 жыл бұрын

No dylan on any car

@PositiveLeadDiagnostics 6 жыл бұрын

Single wire mode in this case means that the network is only communicating on one wire. I don't believe this vw/Audi specific. Lin bus is a single wire network but that's how it was designed.

@DylanRabier 6 жыл бұрын

Thx for the feedback Tommy 👍

@joneskey3950 6 жыл бұрын

Great video. Can you tell us more about the "component protection". Is this feature on every brand new AUDI control unit? It is mandatory to be removed before coding, no? and why is it there in the first place. Thank you sir.

@CesNwk10 6 жыл бұрын

mike roy hey buddy component protection is Audi’s attempt at forcing the user to buy only new parts. They are increasing the amount of parts that they try to block us from changing with known good used parts. If you need help removing component protection on an vw part just reply to me here I can help you out easy enough

@joneskey3950 6 жыл бұрын

cesnwk10, Thank you for the reply. So in order to cut down second hand parts they add component protection. Why do brand new control units have it? Please school us on how to remove it :)

@PositiveLeadDiagnostics 6 жыл бұрын

You can still install a used module and code it. So you don't absolutely have to buy a brand new module. And apparently you need a factory tool to remove it. So even if you install it at home you still have to take it to the dealer to have it removed.

@gst69man 5 жыл бұрын

good vid

@rrmech11 6 жыл бұрын

Nice job Tommy Hey, what company did you go with when you purchased your pico?

@hunting447 6 жыл бұрын

Richard Gill probably autonerdz, Best prices packages I think.

@rrmech11 6 жыл бұрын

Hello tanner. I'm familiar with autonerdz. They have a great forums and much help. But I heard its pretty costly purchasing pico from them compared to the others

@PositiveLeadDiagnostics 6 жыл бұрын

Check scannerdanner.com. I think he has a tool list you can get a decent price through aeswave

@ScannerDanner 6 жыл бұрын

Thanks Tommy! AESwave has unmatched customer service and support

@kennyb1155 6 жыл бұрын

Very interesting video Tom, have you any experience with Audi a3 2006/07 BKD LOOSING DASHBOARD LIGHTS and all switch illumination after ignition is switched on (lights up briefly then cuts out) Many thanks Kenny.

@PositiveLeadDiagnostics 6 жыл бұрын

Losing the back lighting or losing indicator lights ?

@kennyb1155 6 жыл бұрын

back lighting..as well as mileage/odo heater panel display..

@PositiveLeadDiagnostics 6 жыл бұрын

That could be a cluster issue. Not sure though. I would have to see a wiring diagram

@jurehrovat4823 6 жыл бұрын

Hi, Tommy. Can this so called wrong pattern on shorted CAN wire be seen on DLC connector also?

@PositiveLeadDiagnostics 6 жыл бұрын

No. The only messages you will see at the dlc would be from the scantool to the gateway

@paulrunell7821 6 жыл бұрын

was it a new part that you put on and it still had to be virginised

@PositiveLeadDiagnostics 6 жыл бұрын

It was a brand new bcm. That needed component protection deactivated and needed coded

@nandor690 6 жыл бұрын

Ross tech will let you do the coding also

@PositiveLeadDiagnostics 6 жыл бұрын

I was able to do the coding with snap on. A factory tool was needed to remove component protection

@nandor690 6 жыл бұрын

Positive Lead Diagnostics what does that consist of doing? I’m curious if my Ross tech does that. I know it does give me the security code to access adaptation in the modules to change things. Does that model have a drain by the ecm that’s suppose to drain the water away from it? Was it clogged?

@PositiveLeadDiagnostics 6 жыл бұрын

The factory scantool has an option or test plan to turn it off. I don't know what it actually changes internally. The cowl flooded

@therivalryan 5 жыл бұрын

Component protection is 7 bytes programmed to the new module, this is vin specific, it is in the ECU, key and a number of other modules on this model. You can program used parts with ODIS also once the original vin of that part has not been changed the CS can then be accessed via GeKo and rewritten. VCDS does not support component protection on any module on any VAG.