Circuit/System Description

The mode switch circuit consists of 3 or 4 modes depending on how the vehicle is equipped with the transfer case shift control module only monitoring the rear differential lock portion of the switch. The transfer case shift control module supplies a regulated 5 volts, DC to the switch through the 5-volt regulator circuit. The current travels through the resistor of the currently pressed mode button. The current is then returned to the transfer case shift control module through the switch signal circuit.

The transfer case shift control module constantly monitors this signal voltage to determine the condition of the mode switch circuit.

When each of the modes are selected they will complete a circuit through their own specific resistor while the button is pressed. The transfer case shift control module continuously monitors the switch input to determine if the Differential Lock mode was selected by the driver.