Can I get the code from a J519 - Onboard Supply Control Unit

[PetrolDave]

And if I don't have the correct wiring diagram and you or anyone here does have it, can I see it?

Where did you get your wiring diagram from? On here wiring diagram is a link to erwin where you can download the official factory information.

 

[Dr Sheldon]

Right, so tell me what I'm doing wrong. The ECU is pinned iaw the factory wiring diagram, at least the one I have.

I have voltage on the can network where I should not, which could be the cause of all of this. But I have no idea where that voltage is coming from. Almost as if the ECU is directing over 11 volts on the can. Or is that voltage being directed by the J519?

And that is where you are going wrong !!

You are directing your efforts at the Powertrain Can and the ECU -- You HAVE to establish communication with the Gateway First !!!


I gave you the wiring Info from the Correct Factory Diagram !!

 

[hillburnsh]

And that is where you are going wrong !!

You are directing your efforts at the Powertrain Can and the ECU -- You HAVE to establish communication with the Gateway First !!!


I gave you the wiring Info from the Correct Factory Diagram !!

You said which wires to leave connected to the J533 and see if I have communication. I did what you said and nothing changed. I don't recall your next step from that?

I have to go to a job right now and when back, I'll scroll through and and see if I missed your next step. If I did, I'll do it and let ya know.

 

[hillburnsh]

A lot of waffle again - I've given you the factory diagram for the Gateway !! Now go get communication with it - Every other module does not count at this stage !!

AND IVE DONE THAT AND GAVE YOU AN UPDATE (OF STILL NOTHING), SO NOW WHAT? HOW DO YOU PROPOSE I "GET COMMS WITH THE GATEWAY"?



Then behave as though you are not new to this


No you haven't done what I asked you to do - Your dreaming about ECM pins

Your strategy will NOT fix this car. You demonstrate poor understanding of how the car communicates with VCDS even poorer listening skills to good logical robust advice !!

 

[hillburnsh]

And that is where you are going wrong !!

You are directing your efforts at the Powertrain Can and the ECU -- You HAVE to establish communication with the Gateway First !!!


I gave you the wiring Info from the Correct Factory Diagram !!

THE INFO YOU GAVE ME HAD DISCREPANCIES THAT I RELAYED TO YOU BUT DID IT ANYWAY. STILL NO COMMS! SO HOW DO YOU PROPOSE I "ESTABLISH COMMUNICATIONS" WITH THE GATEWAY?

 

[hillburnsh]

I have to keep an open mind here !!

I've looked at the diagram too !!

You are suggesting that J519 was removed from the Vehicle that Comms Loss would be global including J533 - Are you also suggesting that if the J519 and the Cluster was removed from the vehicle that Global Comms lost would be the result ? - Well Would it ?? Go try on a car !!

Just to recap

that is in #7

The question from that is "What is different when in the car as opposed to on the bench !!??

Perhaps OP can post a photo of how exactly he had that set up for context - Picture = 1000 words !! A wiring Diagram of the Set Up would be almost Orgasmic at this stage A Video and it really would be game over for me

@hillburnsh
Straight question !! Is there more to this than is shared in this thread ?? I get that feeling, that funny feeling, shooting up my spine - Got it a lot when the kids weren't working, at uni, and they would phone being all nice at the offset ??

NO, THERE IS NO SECRET INFORMATION THAT IM NOT PROVIDING. HOW WOULD THAT HELP THE SITUATION?

 

[hillburnsh]

post #6 clearly states I can provide correct coding for a small fee. At this point I don't think swapping in the original at this point in time is needed is behavior is the same with original unit installed.

Voltage on T12m/7 and T12m/8 with ignition on?

YES, WITH IGNITION ON

 

[hillburnsh]

Yes smart ass comments run rampant here especially since over the last 4 pages it's been said numerous times that your wiring diagrams are incorrect. Factory wiring diagrams don't look like that and by factory I mean ones that come straight from the only reliable source like vw, audi and so on straight from the manufacturer. What's factory about the wiring diagrams that you have? The fact that they are wrong? Whoever sold you those should be shot. I think at this point it would be wise to purchase erwin access to factory wiring diagrams and undo what was changed. God only know how the ecm is wired and if that not a factor at this point.

Here's a sample of what factory wiring diagrams look like:

I DOWNLOADED FROM IRWIN THE WIRING DIAGRAMS AND THEY MATCH UP TO MY WS MANUAL TO A 'T'. SO THE ECU IS WIRED CORRECTLY.

 

[hillburnsh]

That maybe the correct factory diagram for one part of your car !! Good find !!

It is the Wrong Diagram to guide you towards fixing your car !!


How you manage to swerve good guidance so easily !!??

Google "Unconscious Incompetent"

ITS A GIFT WHEN THAT GUIDANCE IS SMOTHERED IN SARCASM

 

[hillburnsh]

Where did you get your wiring diagram from? On here wiring diagram is a link to erwin where you can download the official factory information.

I honestly cant remember, it was 5 years ago. but I did just download the irwin wiring diagrams for the ecu, J519, J533, D9 and they are identical to how its wired currently.

 

[Dr Sheldon]

You said which wires to leave connected to the J533 and see if I have communication. I did what you said and nothing changed. I don't recall your next step from that?

I have to go to a job right now and when back, I'll scroll through and and see if I missed your next step. If I did, I'll do it and let ya know.

There is no next step !! Not until you can communicate with the Gateway using any known good diagnostic tool.

There is sense at getting feisty with me. VW designed and built it - Not me! You Chose to work on it - Not me ?

I make it common knowledge that I dont own, wont own a German Car !!

Do like the look of Audi RS5 & 6 - Bentley is hard not to like nor are the Rolls Royce models. Who wouldn't ?

I do find them to be a great source of income - VCDS, Erwin, Elsa etc . do make it a pleasure to tackle the failures ....


If there is discrepancy, (WD) Or you think there is then post a clear hi res photo of the Gateway connector plug. Both sides !!

 

[EuroX]

There is no next step !! Not until you can communicate with the Gateway using any known good diagnostic tool.

There is sense at getting feisty with me. VW designed and built it - Not me! You Chose to work on it - Not me ?

I make it common knowledge that I dont own, wont own a German Car !!

Do like the look of Audi RS5 & 6 - Bentley is hard not to like nor are the Rolls Royce models. Who wouldn't ?

I do find them to be a great source of income - VCDS, Erwin, Elsa etc . do make it a pleasure to tackle the failures ....


If there is discrepancy, (WD) Or you think there is then post a clear hi res photo of the Gateway connector plug. Both sides !!

German vehicles are far superior to anything else on the road.

 

[Dr Sheldon]

German vehicles are far superior to anything else on the road.

Clearly you never drove a First Edition Nissan Micra

 

[EuroX]

Clearly you never drove a Japanese econo shitbox

Here I fixed it for you. If I wanted a Tin can death trap I would just choose that's garanteed to get me killed like a Kia or a hyundai, or maybe even daihatsu.

 

[Dr Sheldon]

You can have the last word - It is a bad habit i dont have !!

 

[hillburnsh]

There is no next step !! Not until you can communicate with the Gateway using any known good diagnostic tool.

There is sense at getting feisty with me. VW designed and built it - Not me! You Chose to work on it - Not me ?

I make it common knowledge that I dont own, wont own a German Car !!

Do like the look of Audi RS5 & 6 - Bentley is hard not to like nor are the Rolls Royce models. Who wouldn't ?

I do find them to be a great source of income - VCDS, Erwin, Elsa etc . do make it a pleasure to tackle the failures ....


If there is discrepancy, (WD) Or you think there is then post a clear hi res photo of the Gateway connector plug. Both sides !!

Ok, just to make sure I understand your procedure clearly........
Step 1. De-pin all pins from the J533 except the ones you noted to keep connected
Step 2. Hook up VCDS and try to communicate with the J533 directly and solely with the J533 (isolating all can networks except the circuit that goes from the J533 to the OBDII port.
Step 3. Stare at it long enough it might start working?

Its been mentioned by EuroX that the J519 has something to do with this communication (or no communication). So I would think that digging into the J519 would be the next step, no?

If so, what should I start checking with the J519.....powers & grounds, done that. Now what? You keep telling me how amazing your guidance is and i should follow it. Well, ive done that and we are stopped at step 3, which you say there is none?

 

[Dr Sheldon]

Its been mentioned by EuroX that the J519 has something to do with this communication (or no communication). So I would think that digging into the J519 would be the next step, no?

No !!

If so, what should I start checking with the J519.....powers & grounds, done that. Now what?

No !! 7uck NO !!

If my knowledge serves me right ? - I am happy to be corrected !

You will not get communication with J519 or any module) without first communicating with J533, the Diagnostic GATEWAY !!!!!

There is the Clue !! It is the Gateway !!!


No good telling me what Eurox is doing or how he would do it - I have my own methods and processes, as does he !!

He is Dealer Trained (Porsche VAG I think) whereas I am Bosch Trained (I work on any car that drives through the door) - There will be differences in the Approach

I do read is posts in the thread - I know exactly what he is advising !! As I am sure he reads mine ?

What I do know is that either of us quite likely have your problem nailed in an hour or two !!


For the record I cannot understand why he is asking you look at J519 while you can not communicate with J533 - Not sure I need to know !!

Equally I see no benefit at this stage whether the Ignition comes on or not - Something else I dont need to know just yet !!

If so, what should I start checking with the J519.....powers & grounds, done that. Now what?

Step 1. De-pin all pins from the J533 except the ones you noted to keep connected

No - I did not write that !!!!!

De pin All but the Powers, Grounds, Data lines to 6 & 14 DLC. Then attempt Communication With J533.

I did not write "Keep Connected"

If you cannot communicate with J533 then resolve that FIRST !!!!

https://imgur.com/dILMNyA

 

[hillburnsh]

No !!

No !! 7uck NO !!

If my knowledge serves me right ? - I am happy to be corrected !

You will not get communication with J519 or any module) without first communicating with J533, the Diagnostic GATEWAY !!!!!

There is the Clue !! It is the Gateway !!!


No good telling me what Eurox is doing or how he would do it - I have my own methods and processes, as does he !!

He is Dealer Trained (Porsche VAG I think) whereas I am Bosch Trained (I work on any car that drives through the door) - There will be differences in the Approach

I do read is posts in the thread - I know exactly what he is advising !! As I am sure he reads mine ?

What I do know is that either of us quite likely have your problem nailed in an hour or two !!


For the record I cannot understand why he is asking you look at J519 while you can not communicate with J533 - Not sure I need to know !!

Equally I see no benefit at this stage whether the Ignition comes on or not - Something else I dont need to know just yet !!






No - I did not write that !!!!!

De pin All but the Powers, Grounds, Data lines to 6 & 14 DLC. Then attempt Communication With J533.

I did not write "Keep Connected"

If you cannot communicate with J533 then resolve that FIRST !!!!

https://imgur.com/dILMNyA

You didnt say to keep pins 1, 9, 11, 14, and 19 connected?!?!? If those are not connected, how inn the hell could I even try to communicate with the J533?

I honestly cant remember, it was 5 years ago. but I did just download the irwin wiring diagrams for the ecu, J519, J533, D9 and they are identical to how its wired currently.

doesnt it depend on what the car is equipped with?

 

[Dr Sheldon]

You didnt say to keep pins 1, 9, 11, 14, and 19 connected?!?!? If those are not connected, how inn the hell could I even try to communicate with the J533?

Communication Break down - I meant as in Connected - Communicating !!

Step forwards - You need comms with J533 - Period !!

doesnt it depend on what the car is equipped with?

Not at this stage

 

[hillburnsh]

No !!

No !! 7uck NO !!

If my knowledge serves me right ? - I am happy to be corrected !

You will not get communication with J519 or any module) without first communicating with J533, the Diagnostic GATEWAY !!!!!

There is the Clue !! It is the Gateway !!!


No good telling me what Eurox is doing or how he would do it - I have my own methods and processes, as does he !!

He is Dealer Trained (Porsche VAG I think) whereas I am Bosch Trained (I work on any car that drives through the door) - There will be differences in the Approach

I do read is posts in the thread - I know exactly what he is advising !! As I am sure he reads mine ?

What I do know is that either of us quite likely have your problem nailed in an hour or two !!


For the record I cannot understand why he is asking you look at J519 while you can not communicate with J533 - Not sure I need to know !!

Equally I see no benefit at this stage whether the Ignition comes on or not - Something else I dont need to know just yet !!






No - I did not write that !!!!!

De pin All but the Powers, Grounds, Data lines to 6 & 14 DLC. Then attempt Communication With J533.

I did not write "Keep Connected"

If you cannot communicate with J533 then resolve that FIRST !!!!

https://imgur.com/dILMNyA

Ummm you DID write to de-pin all pins except the ones you noted on post #17. The ones you said to keep connected on the J533 are pins: 1, 9, 11, 14, 19; so the OBDII is connected solely to the J533. Which is EXACTLY what i did. Where is the misunderstanding? I did that and still have no comms with the J533 (original one or the replacement "coded" one makes no difference on the result)

What I cannot understand is the CanH and CanL at the OBDII. with key off, I have 10.8v on BOTH Can wires (obviously not good) With Key ON, I get 12v on BOTH can lines. I wanted to know which side of the circuit the voltages are coming from, so I removed (de-pinned) both CanH and CanL at the OBDII and rechecked voltages on the Can wires at the OBDII. Voltages remain the same. So I re-pinned the OBDII and read voltages again with key ON and OFF and at the same time as reading voltages, I disconnected the J533, voltages go away. So I have to assume the voltages are getting on the Can wires from the J533. Is that wrong?

If it is correct to think like that, then "how" are those voltages getting on the Can wires from the J533? internally? coded wrong (even though the exact scenario happens with both J533's)?

I would think this is obviously why I cannot communicate with the J533, but don't understand how it could happen other than cross feeding at the connector or internally in the J533? I looked over the connector at the J533 and I dont see anything obviously wrong with it and I see no way the pins are cross feeding to either pin 1 or 14.