•  A special 4x4 control module has been adopted for the 4x4 control system control, and it operates the transfer motor according to the signals from the speed sensor, 4x4 switch, and digital TR sensor to perform shifting between 2H, 4H and 4L.

•  The 4x4 CM receives signals from the transfer case sensor and other switches. It then activates one of two solenoids, causing a vacuum from the vacuum pump to be applied to the RFW actuator, and switching the remote freewheel (RFW) unit to lock or free.

•  To prevent reduced performance of the actuator as a result of a decrease in engine vacuum or vacuum pump, such as during acceleration or at high altitude operation, the actuation system includes a one-way check valve.

•  The switching mechanism of the RFW unit is a mechanical dog clutch on the left side of the front differential.

•  The RFW operation is controlled by 4x4 CM.