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Home >> Lincoln >> 2019 >> Nautilus Base, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Four-Wheel Drive Systems) >> Diagnosis And Testing >> Four-Wheel Drive Systems >> Pinpoint Tests >> PINPOINT TEST P : DTC's C0095:07, C0095:18, C0095:19, C00945:44, C90095:71, C0095:92 and C0095:99 >> Pinpoint Test P : RDU (Rear Drive Unit) Motor Phase Circuits

Pinpoint Test P : RDU (Rear Drive Unit) Motor Phase Circuits

WARNING: This page is about a different variant/trim than selected.

  1. P1 INSPECT THE AWD (ALL-WHEEL DRIVE) MODULE AND RDU MOTOR CONNECTORS FOR CONTAMINATION

    • Ignition OFF.

    • Disconnect AWD C3841.

    • Disconnect RDU C4371A.

    • INSPECT the connectors for water intrusion, bent pins, spread terminals, corrosion, or damage.

    Is any damage or contamination present? 

    Yes  REPAIR as necessary. CLEAR DTC and PERFORM KOER self-test.
    No  GO to  P2

  2. P2 CHECK THE AWD (ALL-WHEEL DRIVE) MOTOR CIRCUITS FOR AN OPEN

    • Ignition OFF.

    • Disconnect AWD C3841.

    • Disconnect RDU C4371A.

    Are the resistances less than 3 ohms? 

    Yes  GO to  P3
    No  REPAIR the circuit.

  3. P3 CHECK THE AWD (ALL-WHEEL DRIVE) MOTOR CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect AWD C3841.

    • Disconnect RDU C4371A.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3841-3
      GFD425660Courtesy of FORD MOTOR COMPANY
      		 Ground
      C3841-2
      GFD425660Courtesy of FORD MOTOR COMPANY
      		 Ground
      C3841-30
      GFD425660Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  P4
    No  REPAIR the circuit.

  4. P4 CHECK THE AWD (ALL-WHEEL DRIVE) MOTOR CIRCUITS FOR A SHORT TOGETHER

    • Ignition OFF.

    • Disconnect AWD module C3841.

    • Disconnect RDU C4371A.

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  P5
    No  REPAIR the circuit.

  5. P5 VERIFY CONCERN

    • Ignition OFF.

    • Ignition ON.

    • Enter diagnostic test mode: AWD Module Self Test.

    • Erase AWD Module CMDTCs.

      • Road test vehicle: 

        • 1. Accelerate from 0-30 MPH three times.

        • 2. Steady cruise above 45 MPH for 30 seconds

        • 3. Slow to a stop.

        • 4. Ignition Off.

        • 5. Repeat road test 2 times.

    • Retrieve AWD Module CMDTC

    Did C0095:xx set in the continuous memory 

    Yes  INSTALL a new RDU. REFER to: Axle Assembly .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or terminal issues.
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