WFS Problem nach Motor umbau | Posts 32+

Does anyone have a wiring diagram for the WFS (Windfeldsteuerungssystem) or the control unit?

I had the same problem when I installed the AFN engine in my VW bus. The wiring diagram for the engine wiring harness was printed out for me by the helpful dealer, but the control unit for the WFS is on a separate page.

The entire system is controlled via the diagnostic line (K-line) by the engine control unit (ECU). The ECU for the windshield wiper system should have two connectors: one (I think it's a 3-pin connector) for the reading coil, and another with what I believe are 4 or 5 wires. There should be a black wire, one or two brown wires, a gray wire, and a gray/white wire. I'm not 100% sure because I don't have the wiring diagram here at the moment. The brown wire (or both) is a ground connection, and the black wire is terminal 15 (ignition on). However, please use the actual terminal 15, as it needs to have 12V even during starting. So, don't use any tricks with the car radio's auxiliary contact or anything like that!
The K-line is gray and gray/white. If you had a 1Z without WFS, you need to cut the K-line (gray/white in the wiring harness from the engine control unit) and connect the control unit for the WFS there. As far as I remember, gray connects to gray/white from the engine control unit, and gray/white from the WFS control unit connects to the open end of the K-line in the engine wiring harness (which then goes directly to the diagnostic connector).
You can also connect the control unit for the WFS directly to the diagnostic connector inside the car. This is better because the wires are already exposed at the connector there. Then, mount the reading coil on the ignition switch (be careful, the cable to the control unit for the WFS is not very long) and insert the transponders (from the ignition keys for the AFN) into your original keys. That should be it; the original transponders should already be programmed.

Here's the translation:

"But there's one thing you can forget from the start: no one will disable the WFS (Warm Function Start) in the engine control unit. With manipulated control units like that, anyone could activate any AFN (engine code) and essentially steal it. I believe that removing this lock is a punishable offense, just like tampering with the speedometer."

Hello!
Okay, thank you very much. I'll try it out this weekend. I will, of course, report back on how it turns out.
Thank you again for your effort.
Sure, here is the translation of the text from German to English:

"MFG Stuffy"

This phrase is a German abbreviation that stands for "Mit freundlichen Grüßen," which translates to "Sincerely" or "Best regards" in English. The word "Stuffy" is likely a nickname or a playful way of referring to the person who sent the message.

Hello!
I just wanted to let you know that the connection diagram you gave me worked perfectly. It started up immediately and is running great. Thank you again for that.
Best regards, Simon.

*g* I actually remembered it correctly after all...

These are probably the late consequences of a TDI conversion on a Bulli.