The 4WD switch is installed to the center console or front console. The 2H signal circuit turns ON when the 4WD switch is in the 2H position, and the TCCM recognizes that the 4WD switch is in the 2H position. The 4H signal circuit turns ON when the 4WD switch is in the 4H position, and the TCCM recognizes that the 4WD switch is in the 4H position. Both the 2H signal circuit and 4H signal circuit turn ON when the 4WD switch is in the 4L position, and the TCCM recognizes that the 4WD switch is in the 4L position. The TCCM drives the transfer actuator to shift the gear position inside the transfer to the 4WD switch position operated by the driver.