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Hey everyone, I been a scanner Danner premium member for 2 years now and I want to know how to approach a diagnostic procedure on a AdBlue module on Volkswagen Passat alltrack with a level sensor fault. I have a wiring diagram of the schematic where it incorporates the quality sensor, the temperature sensors and the level sensor. Next to it is the heater circuit. The module with the 3 interactions has a power a ground and Im guessing a signal wire. How can I diagnose theses individually? Thanks