When you connect with a particular Module, such as the DME (MSD80 for N54), you can get a LOT more than just a Fault Code Number: (1) Fault Code Definition, Freeze Frame Data & Fault Details including how many times fault has occurred and mileage/km at which saved (2) F5 Status reads "Live Data", or INPUTS to that Module from Switches, Sensors, Relays, Potentiometers, etc. If you are first starting with INPA, you may NOT be past the "Functional Jobs" stage of reading/clearing Fault Codes. If you see one of the conditions is "Drehzahl = 0 1/min", that means Engine OFF (RPM = 0).
Read/Translate the "Activation Condition" (Ansteuerbedingung) at the top of the Screen. Only thing other than Clearing Fault Codes (Fehlerspeicher löschen) that should NOT be done with engine running is SOME F6 Activations (Steuern). Likewise, viewing a display of "Live Data", using F5 Status, does NOT interfere with Engine operation, even if the data being read are INPUTS to the DME. You are NOT doing anything but querying the Non-Volatile Memory (Fehlerspeicher) of the Module to display items saved in Memory (Fault Memory, Freeze Frame Data & Details), and that does NOT interfere with Module operation.
READING Fault Codes with Engine Running is NOT a problem. I have adopted that practice and have NEVER tried to Clear Fault Codes using INPA with Engine on. Some OTHER Software/ Scan Tools will NOT execute a "Clear Fault Code" operation with engine running, and give a warning onscreen to turn Engine OFF. Other Software or Scan Tools I have used state to Clear/Delete Fault Codes with Engine OFF/ Ignition ON. INPA has NO available Manual or Help file of which I am aware. Is it safe to read and delete error codes while the engine is running or should it always be ignition on with engine off?
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