VW T4 2.5 TDI Fehler Mengenstellwerk | Posts 24+

For me, it doesn't look like the soldering is "too hot".

Quite the opposite. Especially with the right pins, I feel that the solder doesn't flow up onto the wire; it looks like the wire was forced into the solder because it was too cold. While it does stick together somehow, in my opinion, there wasn't enough heat applied to the wire itself.
To the other electricians: If you have a different opinion, feel free to share your comments.

I agree with that as well.
The wires must be cleaned and properly aligned while they are still desoldered. It's best to remove the connector after desoldering. Any residue from the old solder can then be easily removed. Finally, use a device with moderate power to heat the wire and tab together and connect them with solder.
Lead-based solder has a lower melting point than lead-free solder, which helps to avoid unnecessary heat input.
Cover the remaining MSW with aluminum foil during the work.
It worked for me twice.
hg
Herbert.

Thank you very much for the great tips!

I called the repair shop today.
They admitted back then that they didn't install the new interlocking system.
During the repair carried out by the supervisor, it appears that the motor winding was not disassembled, with the wires straightened and reassembled; instead, only the wires were resoldered.
He offered to send me the new MSW and asked that I never contact him again.
I wouldn't have done it anyway, even if it had been appropriate.
In addition, I noticed that the pump retaining plate was missing.
Combined with the poor soldering and wires that are under tension, this is likely the reason for the failures.
I initially resoldered the wires and reinforced them with fuel- and solvent-resistant heat shrink tubing.
I will get the bracket immediately.

Without position 28, diesel lines can also break easily.

Just for information.

Best regards, Rainer.

Hi,
"What's the point of the heat shrink tubing? It doesn't serve any purpose here. Using hot air to shrink it only put unnecessary stress on the RSW sensor and the fuel temperature sensor."
The rear ESP (Electronic Stability Program) support bracket ("holding plate") is essential.
hg
Herbert.

Sorry guys! I actually have it!
It just looks like a part from a 1.9 TDI engine because the ACV engine actually has two cable holders on it.
The RSW sensor and temperature sensor were not in the line of fire .
I definitely feel better about using heat shrink tubing.
Only the future will tell what benefits it will bring.
New MSW (presumably referring to "Material Safety Data Sheet") is being added to the luggage in the meantime.

Hi,
I've been experiencing the same problem today, but in my case, instead of 5V, the measurement block 019 shows a value of 1V.
Does anyone know what that might be?
Best regards.

Sure, here's the translation:

"Also, hi."
It's not very smart to reply to a thread that was started seven years ago. It's better to start a new topic.
What exactly is the same problem? Is it the error message, or are there broken solder joints? Please post about this in a new thread, including the vehicle make and model, engine code, and car scan data.
hg
Herbert.