Shift Control

The Electric Shift Control Module is powered, at all times, through Fuse Link Cartridge 9, in the Power Distribution box, to retain its memory capability. Fuse 17, in the Fuse Panel, provides power for the switches and the Electric Shift Motor.

When either of the two control switches is depressed, the Electric Shift Control Module analyzes information from the transfer case Shift Position Sensor to verify its current position. It also analyzes input information from the Speed Sensor and the Clutch Triple Function Switch (or Backup/Neutral Safety Switch, depending upon transmision application). If all the design conditions of the System are met, the Electric Shift Control Module commands the Shift Motor to execute the desired function. After the shift takes place and the motor is turned off, the Electric Shift Control Module again looks at the inputs from the Shift Position Sensor to determine if the transfer case is in the position that the operator selected. Finally, the Electric Shift Control Module illuminates the pushbuttons in the Electric Shift Control Switch to indicate that the desired function has been completed.

The Electric Shift Control Module has a self diagnostic capability. The procedure is under TROUBLESHOOTING.