In simple terms, the AU “Edit” is a tuning program used to change the settings and base maps in your factory
ECU. This means that as opposed to using a piggyback or complete replacement
ECU, you can use your factory computer, but still modify the settings and parameters to increase performance. It’s a particularly useful tool if your car is modified, or if you intend to go down the turbo/supercharger path and still want to have a fully engineered setup.
The Edit is done using a Flash Tuner, which is quite simply, a little black box that plugs into your OBD (On Board Diagnostics Port). Pop off your interior fuse cover, and you’ll see a connector – this is where it plugs in, and in a few seconds you can upload and change your ECU’s programming. The Flash Tuner holds up to 4 programs – the first being your factory
ECU settings, and the other 3 being custom tunes developed for your car.