Vehicle control system and method

A vehicle control system comprising:

• a range selector having an operating member operable by a driver of a vehicle and operable to perform a range selection operation and a non-range selection operation, the range selecting operation being for shifting the operating member to select a travel range and a non-travel range as shift ranges of an automatic transmission of vehicle, and the non-range selecting operation being for shifting the operating member to a common switch position of the operating member as a different operation from the range selection operation;
• a shift control device for controlling a switching operation of a shift range of the automatic transmission in accordance with the range selecting operation;
• an engine control device for controlling an ON/OFF operation of an engine of the vehicle in response to an engine switch operation of the operating member;
• and
• an accessory power supply control device for controlling ON/OFF operation of an accessory power source of the vehicle in response to an accessory power supply operation of the operating member;
• wherein the shift control device switches the shift range to the travel range at the same time as the engine control device turns on the engine, when the operating member is shifted to select the travel range as the engine switch operation under a condition that a brake is applied to the vehicle,
• wherein the shift control device switches the shift range to the travel range, when the operating member is shifted to the travel range as the range selection operation after the engine control device turned on the engine, in case that the operating member is shifted to the common switch position as an engine ON operation as the engine switch operation under the condition that the brake is applied to the vehicle,
• wherein the accessory power supply control device turns on the accessory power source when the operating member is shifted to the common switch position as the accessory power supply operation under the condition that the brake is applied to the vehicle,
• wherein the engine control device turns off the engine, which is in an ON condition, when the operating member is shifted to the common switch position as the engine switch operation, and
• the accessory power supply control device turns off the accessory power source, which is in an ON condition relative to an OFF condition of the engine, when the operating member is shifted to the common switch position to indicate an accessory power supply turn-off condition under a vehicle travel speed condition, which is the same as the engine OFF condition or under a shift range condition, which is the same as the engine OFF condition.