Dakota 4WD V8-4.7L (2009)
Four Wheel Drive Selector Switch: Description and Operation
NV233 Transfer Case
Transfer Case Switch - Description
DESCRIPTION
The selector switch assembly is mounted in the right side of the vehicle's Instrument Panel (IP) and consists of a rotary knob connected to a resistive
network for the mode and range shift selections. Also located in this assembly is a recessed, normally open momentary switch for making shifts into and
out of transfer case NEUTRAL. A pen, or similar instrument, is used to make a NEUTRAL shift selection, thus reducing the likelihood of an inadvertent
shift request.
Transfer Case Switch - Operation
OPERATION
As the position of the selector switch varies, the resistance between the Mode Sensor supply voltage pin and the Mode Sensor output will vary.
Hardware, software, and calibrations within the Front Control Module (FCM) are provided that interpret the selector switch resistance as given in the
table below:
SELECTOR SWITCH INTERPRETATION
The internal structure and function of the selector switch is such that the connection is made to the Open/Diagnostic resistor before the connection to the
individual position resistors is broken. Because of this characteristic, if the resistance between the Mode Sensor supply voltage pin and the Mode Sensor
output pin is >19k ohms, the position resistor is open.
