Commander 4WD V8-4.7L Flex Fuel (2009)
Gear Sensor/Switch: Description and Operation
Mode Sensor - Operation
OPERATION
During normal vehicle operation, the Final Drive Control Module (FDCM) monitors the mode sensor outputs at least every 2 milliseconds when the shift
motor is stationary or active.
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 shifting, See: Relays and Modules - Transmission and Drivetrain/Relays and Modules - Transfer Case/Control
Module/Description and Operation/Final Drive Control Module - Operation
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.
The mode sensor position will be considered invalid by the FDCM if the voltage is greater than or equal to encoder_High_Range_Limit Volts or if it is
less than or equal to encoder_Low_Range_Limit Volts.
If FDCM looses the encoder signal during a shift, the FDCM will respond with a shift back in the opposite direction of travel to first attempt to find the
encoder signal. If the signal is not found, the FDCM will drive motor in AWD direction for 1 second.
Refer to MODE SENSOR VOLTAGES table for the mode sensor voltages.
MODE SENSOR VOLTAGES
