Piwi diagnostic program for Porche Taykan

[carlos vilarinho]

The other day I disassembled my Dashboard and noticed that the ribbons that connect the panel to the warning lights were like this... I didn't open the entire instrument panel, but I cleaned the ribbons and put them back in place, I don't know to what extent my panel is broken and that it is giving all these errors with LIN 1 and LiN4... is there any way to check if it is the instrument panel that is interfering with the Lin in the car... According to the electrical diagrams, all communication errors go through the instrument panel..., if I have to change the instrument panel and buy a used one, I assume that the instrument panel will have to be programmed for my car ….correct?????

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[carlos vilarinho]

Even though the instrument panel looks like everything is working as it should, to what extent is it not damaged somewhere…? I repeat I did not open the entire instrument panel I do not know to what extent the remaining ribbons connected to the instrument panel board or even the board itself were affected...

 

[carlos vilarinho]

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[carlos vilarinho]

 

[mutanthands]

I would be concerned as to what is causing those burn marks / melting on the flex cable. I wonder if there's a short somewhere?
I'd look at replacing the flex cables, especially the one with the tear, as they can be quite delicate.

 

[carlos vilarinho]

I would be concerned as to what is causing those burn marks / melting on the flex cable. I wonder if there's a short somewhere?
I'd look at replacing the flex cables, especially the one with the tear, as they can be quite delicate.

because the question is where can I get two identical flex cables to replace...???? Since the car's problem is a LiN problem, to what extent is the instrument panel only having these damaged flex cables... is it the instrument panel that is giving me these LIN errors... I have a communication error in everything that passes through the instrument panel and I have to remove it and check the connector on LIN 1 and Lin 4 but will I be able to disconnect the instrument panel from the connector with the 12 V battery connected without a problem...?????

 

[Cowtownhusker]

To my eye, there appears to fire/water-induced corrosion as well?

 

[carlos vilarinho]

I leave here the Electrician diagrams where you can see that the instrument panel could have everything to do with the car's errors..., Cowtownhusker I don't know what it is or what it isn't... the question for me is whether or not the instrument panel is at the center of the car's errors... at first glance the instrument panel works normally but this could be the problem... whether the panel has corrosion or not or if the flex is a little melted doesn't leave me spasmed, I need to know how I can test the instrument panel and the plug to know if there is a problem here... we all know that a door lining burned due to vandalism and everything has already been replaced with new, what remains... there is still a problem with the LIn manufacturing between modules and this could be the module that is interrupting the connectivity... if I can reach the conclusion that the instrument panel is damaged I will definitely change it...

 

[mutanthands]

I agree, looks like burning damage, probably from a short somewhere, and some kind of corrosion due to moisture, which might have caused the short!
Do the flex cables have any numbers on them that you can look up? I suspect through Porsche might be the only option, which might be tricky for such niche part.

 

[carlos vilarinho]

I agree, looks like burning damage, probably from a short somewhere, and some kind of corrosion due to moisture, which might have caused the short!
Do the flex cables have any numbers on them that you can look up? I suspect through Porsche might be the only option, which might be tricky for such niche part.

There is no complication, obviously Porsche does not sell these flex cables alone…….If I can find out that this unit is broken and is causing these errors in the car, I will certainly buy a new unit, or a new second-hand unit. Now, if I have to change the unit, I assume that the unit will have to be reprogrammed for my car... and it will have to be Virginized before being programmed again.

 

[Cowtownhusker]

I leave here the Electrician diagrams where you can see that the instrument panel could have everything to do with the car's errors..., Cowtownhusker I don't know what it is or what it isn't... the question for me is whether or not the instrument panel is at the center of the car's errors... at first glance the instrument panel works normally but this could be the problem... whether the panel has corrosion or not or if the flex is a little melted doesn't leave me spasmed, I need to know how I can test the instrument panel and the plug to know if there is a problem here... we all know that a door lining burned due to vandalism and everything has already been replaced with new, what remains... there is still a problem with the LIn manufacturing between modules and this could be the module that is interrupting the connectivity... if I can reach the conclusion that the instrument panel is damaged I will definitely change it...

This discussion is over my head technically, but I would have to think you could have a reputable electronic repair shop assess continuity of those cables without having to have them replaced. I just worry with the corrosion on the aluminum, is there insidious thermal/water damage which will be difficult to parse out or affect multiple systems. Best of luck with this.

 

[carlos vilarinho]

This discussion is over my head technically, but I would have to think you could have a reputable electronic repair shop assess continuity of those cables without having to have them replaced. I just worry with the corrosion on the aluminum, is there insidious thermal/water damage which will be difficult to parse out or affect multiple systems. Best of luck with this.

Yes, I am already in contact with a company specializing in electricity. Regarding corrosion, it is obviously not normal for aluminum to be like this, but all the units inside the car have already been checked and this is the one that appears this way (...thank goodness...). It is exactly because of all this and that, despite the instrument panel not visibly showing any damage or error, I am beginning to discover that the problem is right here, and that is why I have to test the LIn in the electrical connector of the instrument panel... because this panel may have a problem and be causing a lack of connectivity to other modules... anyway, I am very grateful for your observation... ?

 

[carlos vilarinho]

There is no complication, obviously Porsche does not sell these flex cables alone…….If I can find out that this unit is broken and is causing these errors in the car, I will certainly buy a new unit, or a new second-hand unit. Now, if I have to change the unit, I assume that the unit will have to be reprogrammed for my car... and it will have to be Virginized before being programmed again.

 

[carlos vilarinho]

I needed some information, in case I need to change my instrument cluster for a new second-hand one and need to reprogram the cluster, with Piwi is it possible to do this coding for my car…..??????…. or will it just be connecting the plug without the need for coding…???

 

[whitex]

From the very high level diagram below:

You seem to be reporting BMC1-LIN1 and BMC1-LIN4 errors. LIN1 goes to wipers, rain sensors, light switch, and something labeled instrument. LIN4 does to IC switches (presumable the touch buttons around instrument cluster), so those flex connectors could be the source, as could the circuit boards they plug into, if they are damaged too.

You can probably check whether or not the flex connector (a.k.a. flexible PCB) is ok by checking resistance of each trace. While you may not be able to buy one from Porsche (still worth checking though), you could have one made. Find some hobbyist who has done circuit board design and you can have them manufactured inexpensively through places like PCBway. You could learn how to do it yourself, but that's yet another project and skill set (though this is probably the simplest type of PCB design you can do, straight through connections, no components).

As mentioned above, I'd be looking at where was the fire or flood, see if there is any additional damage nearby.

New instrument cluster will require pairing with the vehicle. Not sure whether offline PIWIS will be able to do it as it may involve odometer, which in turn can require Porsche online connectivity. This is just what I heard, I've never attempted doing this myself.

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