No such thing for D2 and i doubt that any ECU will end up with wiped memory after that "hard reset" thing, the hard reset is effective for CAN-bus vehicles(D2 is not) to discharge capacitance of the data bus cable, nothing to do with ECUs whatsoever cos all the EEPROMs are ''isolated'' from the battery through the ignition switch and through transistor switches on the PCB ... i've seen that hard reset theory on many forums and IMO it's a false myth that it has any effect on a D2, it's completely useless