Power Source Mode does not Change to ON (IG) [03/2017 - ]: Description

If the engine switch is pressed with the electrical key transmitter sub-assembly is in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode.

HINT: 

When the battery cable is disconnected and reconnected, the power source mode returns to the mode it was in before the battery cable was disconnected.