List of things that prevent auto stop/start from 'stopping'.
Auto Engine Stop/Start
When the brakes are applied and the vehicle is at a complete stop, the engine may turn off.
When stopped, the tachometer displays AUTO STOP.
See Tachometer pg 114.
When the brake pedal is released or the accelerator pedal is pressed, the engine will restart.
To maintain vehicle performance, other conditions may cause the engine to automatically restart before the brake pedal is released.
Auto Stops may not occur and/or Auto Starts may occur because:
. The climate control settings require the engine to be running to cool or heat the vehicle interior.
. The vehicle battery needs to charge.
. The vehicle battery has recently been disconnected.
. Minimum vehicle speed has not been reached since the last Auto Stop.
. The accelerator pedal is pressed.
. The engine or transmission is not at the required operating temperature.
. The outside temperature is not in the required operating range.
. The vehicle is shifted out of D (Drive) to any gear other than P (Park).
. Certain driver modes have been selected.
See Driver Mode Control pg 242 and Four-Wheel Drive pg 233.
. The vehicle is on a steep hill or grade.
. The driver door has been opened or the driver seat belt has been unbuckled.
. The hood has been opened.
. The Auto Stop has reached the maximum allowed time.
Sometimes I forget to shut it off and sometimes I let it run so I can play with it. (Most trips it's not going to kick-in for the first few stops anyway because one of the restrictions in the list that prevent stops.)
Playing with it I've found that it is also possible to release the brake pedal enough to cause a re-start without the vehicle moving.