Transfer Shift Control

The 4WD control module controls the transfer shift actuator based on the signal from the 2WD/4WD switch so that the transfer is shifted to the selected position (2H, 4H, N or 4L). (Shifting to the N position requires that the switch be kept pushing for at least 5 seconds.)

The transfer shift actuator consists of the transfer shift actuator motor and the transfer shift actuator motor position sensor. The 4WD control module detects the position of the actuator motor using the position sensor and controls the actuator motor running / stopping operation.

Also, the transfer fork switch, 4WD switch and 4L switch that detect the each position of the front drive shift shaft and the reduction drive shift shaft are installed within the transfer assembly. The 4WD control module detects the transfer actual shift position (2H, 4H, N or 4L) by the signals from the transfer fork switch, 4WD switch and 4L switch as follows.

Relationship of transfer shift position and switches 

When the transfer shift actuator motor position detected by motor sensor and transfer actual shift position detected by the above-mentioned switches match, the 4WD control module judges that the transfer shifting is complete.