Durango 4WD V8-4.7L VIN P Flex Fuel (2007)
Gear Sensor/Switch: Description and Operation
NV144 Transfer Case
Description
DESCRIPTION
The transfer case mode sensor (2) 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 sensor may rotate a full 360 degrees for both the NV144
and the NV244 GENII. The operating envelope or sector rotation is -5 to 180 degrees for the NV144 and -40 to 20 degrees for the NV244 GENII. 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 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.
The following information describes the different mode sensor positions:
-
4LOCK TARGET REGION - The position shall be considered 4LOCK if the voltage is greater than or equal to encoder_4LOCK_min Volts and it
is also less than or equal to encoder_4LOCK_max Volts.
-
AWD TARGET REGION - The position shall be considered AWD if the voltage is greater than or equal to encoder_AWD_min Volts and it is
also less than or equal to encoder_AWD_max Volts.
-
AWD SHIFT LIMIT - During Phase 2 and Phase 3 shifting, shifts may become unidirectional when a voltage is greater than or equal to
encoder_AWD_min Volts has been reached.
