Hi, I'm new here so I hope this is posted in the right place. I have an Audi A6 Quattro 2002 2.5 TDI which isn't starting (turning over but not firing up). The mechanic who is working on the car is trying to find out what is happening between the engine fuel pump and the engine ECU and we've been searching online for a wiring diagram that shows the engine ECU Pin Data but haven't been able to find one. I hope it's ok to ask on here if anyone has one they can share please? Many thanks for any help, it's much appreciated.