This is what I have gathered from reading the manual the last couple of days:
Map switching does NOT reflash the ecu. The accessport uses 2 types of maps ... baseline, and realtime. Changing the baseline map does use a reflash. If your ecu ever loses power, it will revert from whatever realtime map you have selected back to the baseline map and lose all the learning it has done since it was plugged in.
Realtime maps on the other hand behave exactly like ecu learning ... they reside in the area of memory that only persists while the ecu has power. As a result, they can be changed an unlimited number of times, but if you lose power you lose the map. No big deal of course, since the map is still stored on the accessport and it only takes 10 seconds to switch it back in.
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