Circuit Operation

When voltage is applied to the shift actuator terminal 2 from the transfer-ECU, the motor turns to the normal direction and the drive mode is shifted in the order of 2H --> 4H --> 4HLc --> 4LLc. When voltage is applied to the shift actuator terminal 1, the motor turns to the reverse direction and the drive mode is shifted in the order of 4LLc --> 4HLc --> 4H --> 2H.