Hello everyone!
"Just a heads-up: I absolutely hate electricity, so please don't be surprised by my questions!"
Okay, here's the translation:
"I converted my Corrado to a 1Z engine from a 1996 Passat, including the WFS (engine control module) and an OBD diagnostic connector. Since I've mostly figured out the wiring, I'd like to test the OBD connector to make sure everything is working correctly. The connector itself likely has power, ground, and the diagnostic data line. How can I check if all the wiring is correct? I have a multimeter available, but the person helping me isn't knowledgeable about electrical systems. This is important because a friend needs to use a diagnostic tool to adjust the engine control module and the WFS, and he says the OBD connector needs to be working for that. Power and ground are straightforward (but how do I check them?), but where should I measure the diagnostic data line (the gray-white cable)? Should I measure between the connector, the engine control module, and the OBD connector? How should I connect the multimeter...?"
"Another question: Is it correct that the original instrument cluster from a Passat Estate is connected to the gray connectors in the fuse box? If so, what is its purpose? Is it for resetting the service interval display or something similar?"
Sorry for the silly questions, but my area of expertise is more in mechanics...
Thank you!
Translated on 19-08-2026, 10:03.
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