VAG-COM: No Central Locking on Polo 1.4 TDI (2002)

Hello everyone,
I'm new here and I'm having a problem. Sometimes the central locking system on my Polo 1.4 TDI is malfunctioning. I can lock the car with the remote, but unlocking it with the remote doesn't always work. Sometimes it works, sometimes it doesn't. Right now, it's working again.
To get to the bottom of the problem, I tried to read the error memory of the central locking module using VCDS, but VCDS doesn't find the control unit. The question is, why not? All other control units are found. Can anyone help me with this?

I've already removed the fuse from the control unit and disconnected the battery, holding both terminals together for a while. Nothing has worked. The control unit sometimes gets stuck, and it's supposed to reset to its normal state when it's without power.

Regards,
Gerd.

Hi Gerd,

Which VAG-COM version and interface are you using?

Best regards, Rainer.

Hello Rainer,
I am using the shareware version of 409.1 or 311.3. I developed the interface myself. It works with Max and MC33290. It is connected to a COM port via a PCMCIA adapter.

Regards,
Gerd.

Which address are you referring to? 35 or 46?

Hello Sebastian,

I think it's option 35. The car probably has a comfort control module, so it's option 46.
I've only had the car for 14 days.
Right now, it's not here, so I can't test it with the 46.

Regards,
Gerd.

rudi2 wrote:

...I think it's the wrong 35. The car probably has a comfort control module, so it's likely the 46.

Correct, that's where your mistake is.

Thank you.

I've now found the control unit, but there are no error codes registered, and my problem has reappeared.
I'm starting a new thread.

Regards,
Gerd.

Check measurement blocks for plausibility, it's very simple.

Hi Sebastian,
Could you please explain this to me in more detail? I can't interpret most of the values in the data blocks. I'm completely lost, like someone looking at the inner workings of a clock. Also, it seems there's no label file available for the control unit. Surely there should be one, right?

Regards,
Gerd.

rudi2 wrote:

I cannot interpret most of the values in the measurement blocks.

http://www.ross-tech.com/vag-com/download/label-files/6Q0-959-433.lbl

rudi2 wrote:

Furthermore, it appears that there is no label file available for the control unit.

The corresponding English version has the last update from December 2005 and therefore may not yet be included in your VAG-COM version. That's the disadvantage of not using the latest versions.

Thank you.
I've just downloaded version 607. Can I copy the label files into my version 409?

Regards,
Gerd.

rudi2 wrote:

Thank you, I've now downloaded the 607. Can I copy the label files into my 409?

"They might work, but they won't function correctly, at least not completely, and we assume no liability for any malfunctions. While the 409 already partially supports label forwarding, it still has some issues in that regard, which means that some label files will not be displayed or used. Furthermore, certain features (i.e., the content of the label files) were only added in newer versions (most recently, separate labels for default settings in version 603)."

Hello Sebastian,

Sebastian@OpenOBD wrote:

Checking measurement blocks for plausibility is very easy.

I did what I could, to the best of my ability. Unfortunately, I couldn't find anything unusual. If the doors are locked, it's also indicated on the control panel.
Do you have any other tips on that?

Today, everything was normal for a while. At the moment, the problem has returned, and the locking mechanism is not working again.

Regards,
Gerd.