High acceleration from high speed
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
The engine runs on the normal lift cam. During an uphill run or an abrupt acceleration, the engine runs on normal valve lift mode 2 for about 2 seconds to check the VTEC system, then it returns to normal valve lift mode 1.