Liberty 4WD V6-3.7L (2009)
MP1522 TRANSFER CASE
The transfer case mode sensor, also known as "Encoder" (3) which is integrated into the shift motor assembly, provides the Drivetrain Control Module
(DTCM) 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. The DTCM must supply 5V DC (±2.5%) to the sensor whenever the DTCM is not in
sleep mode and monitors the shift motor position. The sensor position is monitored when the ignition is in the RUN position and for TBD seconds after
the ignition is shifted to the ACC 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 30 mA of current during operation.
Mode Sensor - Operation
OPERATION
NOTE: All the parameter voltages referred to in the following information are calibrated items in the controller software and are subject to
change.
During normal vehicle operation, the DTCM monitors the mode sensor outputs at least every 2 milliseconds when the shift motor is stationary or active.
The mode sensor position will be considered invalid by the DTCM if the voltage is greater than 3.51 V or if it is less than 1.52 V. The DTCM shall
consider t-case position based on the MODE SENSOR VOLTAGES table listed below.
MODE SENSOR VOLTAGES
