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Pinpoint Test J : The AWD (All-Wheel Drive) Module Does Not Respond To The Diagnostic Scan Tool

WARNING: This page is about a different car, the 2019 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to OEM WIRING DIAGRAMS FOR MODULE COMMUNICATIONS NETWORK - CELL 14 for schematic and connector information. Refer to OEM WIRING DIAGRAMS FOR ALL WHEEL DRIVE (AWD) - CELL 34 for schematic and connector information.

    Normal Operation and Fault Conditions 

    The AWD module communicates on the HS-CAN1.

    Possible Sources 

    • Fuse
    • Wiring, terminals and connector
    • AWD module

    Visual Inspection and Pre-checks 

    • Verify BJB fuse 12 (15A), AJB fuse 1 (40A) and High Current BJB fuse 4 (60A) are OK.

  2. J1 CHECK THE AWD (ALL-WHEEL DRIVE) MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

    • Disconnect AWD module C281.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C281-1
      GFD385083Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  J2
    No  VERIFY BJB fuse 12 (15A), AJB fuse 1 (40A) and High Current BJB fuse 4 (60A) are OK. If OK, repair the circuit in question. If not OK, REFER to the Wiring Diagrams service information to identify the possible causes of the circuit short.

  3. J2 CHECK THE AWD (ALL-WHEEL DRIVE) MODULE GROUND CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C281-46
      GFD385385Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  J3
    No  REPAIR the circuit.

  4. J3 CHECK THE HS-CAN1 (HIGH-SPEED CONTROLLER AREA NETWORK 1) CIRCUITS BETWEEN THE AWD (ALL-WHEEL DRIVE) MODULE AND THE GWM (GATEWAY MODULE A) FOR AN OPEN

    • Disconnect GWM C2431.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C281-9
      GFD385385Courtesy of FORD MOTOR COMPANY
      		 C2431-20
      C281-8
      GFD385385Courtesy of FORD MOTOR COMPANY
      		 C2431-19

    Are the resistances less than 3 ohms? 

    Yes  CONNECT the GWM. GO to  J4
    No  REPAIR the circuit in question.

  5. J4 CHECK FOR CORRECT AWD (ALL-WHEEL DRIVE) MODULE OPERATION

    • Ignition OFF.

    • Disconnect and inspect the AWD module connector.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the AWD module connector. Make sure it seats and latches correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new AWD module. REFER to: All-Wheel Drive (AWD) Module .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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