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DTC U0102 - Lost Communication With Transfer Case Control Module

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
U0102 - LOST COMMUNICATION WITH TRANSFER CASE CONTROL MODULE

Description:  This DTC sets when the PCM receives invalid data from the transfer case control module.
Possible Causes: 
  • Communication error
Diagnostic Aids:  Network DTC concerns occur during module to module communication. Refer to the appropriate Module Communications Network article, Communication Network DTC chart to continue diagnosis.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST AE .