Scheme 2
Scheme 3
Operation
These functions automatically combine to distribute driving torque between the front and rear wheels when the vehicle accelerates or when wheels are slipping. When the vehicle speed is about 18 mph (30 km/h) or below, and the shift lever is in R, 2, or 1, the system will manually engage the rear differential clutches when the VTM-4 LOCK button is pressed. By design, in lock mode, the torque is gradually reduced at speeds above 6 mph (10 km/h) to minimize the load on the 4WD system. The VTM-4 control unit has a fail-safe function and a self-diagnosis function.
