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Home >> Dodge and Ram >> 2007 >> Durango 3.7 K >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Electronic Control Modules (Service Information) >> Electronic Control Modules >> Module - Transfer Case Control >> Operation >> Shift Motor Control

Shift Motor Control

The FCM will have the ability to vary the speed of the transfer case motor through pulse width modulation (PWM). It is PWM from 0 to 100% at 100Hz.

The PWM will function as follows:

  1. Apply an initial duty cycle (APPROXIMATELY 94%) to shift motor control wires.
  2. Control the acceleration of the shift motor by increasing the applied duty cycle at a specified rate.
  3. Control the deceleration of the shift motor by updating the applied duty cycle to the shift motor control wires at a specified rate based upon the difference between the desired position and the current position.
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