Dakota 4WD V8-4.7L Flex Fuel (2008)
Gear Sensor/Switch: Description and Operation
NV244 GENII Transfer Case
Description
DESCRIPTION
The transfer case mode sensor (1) provides the Front Control Module (FCM) feedback about the position of the transfer case. The sensor consists of a
linear analog position sensor that converts the motor output shaft position into a DC signal. The FCM must supply 5VDC (+/- 0.5v) to the sensor
whenever the FCM is not in sleep mode and monitor the shift motor position. The sensor position is monitored when the ignition is in the RUN position
and for 10 seconds after the ignition is shifted to the OFF position. The sensor is mechanically linked to the shaft of the cam which allows the transfer
case to shift. The mode sensor will draw less than 20 mA of current during operation.
Operation
OPERATION
During normal vehicle operation, the Front Control Module (FCM) monitors the mode sensor outputs at least every 2 milliseconds when the shift motor
is stationary or active.
Refer to the following chart for the relative angles of the transfer case shift sector versus the interpreted transfer case gear operating mode.
NOTE: All the parameter voltages referred to in the following information are calibrated items in the controller software and are subject to
change.
NOTE: For a further explanation of Phase 1 through 3 shifting, See: Relays and Modules - Transmission and Drivetrain/Relays and Modules -
Transfer Case/Control Module/Description and Operation/Operation.
The following information describes the different mode sensor positions:
-
4LO TARGET REGION - The position shall be considered 4LO if the voltage is greater than or equal to encoder_4LO_min Volts and it is also
less than or equal to encoder_4LO_max Volts.
-
4LO SHIFT LIMIT - During Phase 2 and Phase 3 shifting, shifts may become unidirectional when a voltage is less than or equal to
encoder_4LO_min Volts has been reached.
-
4HI TARGET REGION - The position shall be considered 4HI if the voltage is greater than or equal to encoder_4HI_min Volts and it is also less
than or equal to encoder_4HI_max Volts.
-
NEUTRAL TARGET REGION - The position shall be considered NEUTRAL if the voltage is greater than or equal to encoder_Neutral_min
Volts and it is also less than or equal to encoder_Neutral_max Volts.
-
2WD TARGET REGION - The position shall be considered 2WD if the voltage is greater than or equal to encoder_2WD_min Volts and it is also
less than or equal to encoder_2WD_max Volts.
