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.

NOTE: For a further explanation of Phase 1 through 3 shifting, 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.
- 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.
- 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.
- 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 FCM 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.

Refer to MODE SENSOR VOLTAGES - NV244 GENII table for the mode sensor voltages.