Patent ID: 7377192

Claim:
A controller for a vehicle-mounted component comprising: an automatic transmission that reduces a rotation of an engine and outputs the rotation at an output shaft; a shift position detector that detects an effective shift position of the automatic transmission; a shift position switching unit that switches the effective shift position of the automatic transmission; a parking switching unit that mechanically locks the output shaft of the automatic transmission when the shift position switching unit switches the effective shift position in a parking position; and a shift position switching controller that controls the shift position switching unit, a current supply thereto being substantially stopped when the engine is stopped; a memory device that memorizes the effective shift position at a timing when the shift position switching controller stops being energized; and a vehicle-mounted component controller that prohibits an operation of a vehicle-mounted component when the effective shift position memorized in the memory device is not in the parking position while the current supply to the shift position switching controller is stopped.