The Mitsubishi Montero Active Trac 4WD System is made up of a transfer case equipped with a viscous coupling and center differential, and an auto-freewheel front differential. It is controlled by electronics and vacuum. The transfer case for the manual transmission has 5-position shift pattern.
The transfer case has five electric switches. These switches signal the electronic control unit that a 4WD shift has been made; the ECU in turn illuminates the dashboard indicator lamps to advice the driver of the status of 4WD operation.
Mitsubishi Montero Active Trac 4WD System Wiring Diagram