Download Owner's Manual - RHD (UK, Australia)
Engine speed while driving (vehicles with an automatic transmission): In the following conditions, the engine speed may become high while driving. This is due to automatic up-shifting control or down-shifting implementation to meet driving conditions. It does not indicate sudden acceleration.
The vehicle is judged to be driving uphill or downhill. When the accelerator pedal is released. When driving on curves.
When the brake pedal is firmly depressed.