Transfer Case Range Select Switch Input (Neutral, 2WD, 4WD Auto And 4WD Low Select Switch)

The transfer case range select switch is hardwired directly to the Cluster (CCN). The switch position is read by the CCN and is communicated to the TIPM (Gateway) via the CAN-I bus. The TIPM then rebroadcasts this information onto the CAN-C bus where the FDCM is a receiver.

The Cluster (CCN) will support circuitry which interfaces to the system's Transfer Case Range Select Switch, including a Transfer Case Range Select Switch voltage supply and a Transfer Case Range Select Switch input. The purpose of this circuitry is to determine the mode currently being requested by the operator via the resistance ladder network in the shifter assembly, where the Transfer Case Range Select Switch is packaged.

The NEUTRAL Select Switch Input will provide the operator with the ability to place the Transfer Case in Neutral. The Select Switch Input will provide the operator with the ability to place the transfer case in 2WD, 4WD AUTO and 4WD LOW. The NEUTRAL Select Switch is a momentary pushpin switch and the 2WD, 4WD AUTO and 4WD LOW Select Switch is a 3-position toggle or a contact switch and both these switches are provided through a resistor network for diagnostic purposes. The input will have an internal 1.0K +/- 1% pull-up resistor to 5V.

As the selected position in the switch varies and/or the NEUTRAL Switch is depressed or not, the resistance between the Cluster (CCN) voltage supply and Transfer Case Range Select Switches input will vary. Hardware, software, and calibrations within the Cluster will be provided that interpret the external resistance between the module's Transfer Case Range Select Switches voltage supply and Transfer Case Range Select Switches inputs as given in the table below: