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Home >> Lincoln >> 2016 >> Navigator Select, 4WD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Four-Wheel Drive Systems >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems 2-Speed Torque-On-Demand >> Pinpoint Tests >> Pinpoint Test Y: Neutral Flat Tow Functional Test >> Pinpoint Test Y : Neutral Flat Tow Functional Test

Pinpoint Test Y : Neutral Flat Tow Functional Test

    WARNING: Shifting the transfer case to its neutral position for neutral flat towing may allow the vehicle to be able to roll even if the transmission is in park (P). Make sure the foot brake is depressed and the vehicle is in a secure and safe position while the transfer case is being shifted to its neutral position. Failure to follow this instruction may result in serious personal injury.
    2. WARNING: Do not disconnect the battery during neutral flat towing. Doing so will prevent the transfer case from shifting properly and may allow the vehicle to roll even if the transmission is in park (P). Failure to follow this instruction may result in serious personal injury.
    3. NOTE: 2WD vehicles cannot be towed with any wheels on the ground as vehicle or transmission damage may occur.
    4. NOTE: Failing to put the transfer case in its NEUTRAL position can damage vehicle components.
    5. NOTE: 4WD vehicles can only be flat towed with all wheels on the ground by placing the transfer case in its NEUTRAL position.

  6. Y1 CHECK NEUTRAL FLAT TOW ACTIVATION AND DEACTIVATION

    Does the IC indicate neutral flat tow is activated? 

    Yes  RETURN the vehicle to the customer. ADVISE the customer about the correct Neutral Flat Tow Activation and Deactivation procedure in the owners information.
    No  GO to  Y2.

  7. Y2 CHECK NEUTRAL FLAT TOW ACTIVATION WHILE MONITORING THE TCCM 4WD MODES (4WD_MODES) PID

    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: TCCM DataLogger.
    • Monitor the 4WD_MODES PID.

    Does the PID indicate NEUTRAL? 

    Yes  REFER to Instrumentation, Message Center, and Warning Chimes to diagnose IC faults. After the repair is complete, CLEAR the DTCs.
    No  GO to  Y3.

  8. Y3 CHECK FOR TCCM DTCs

    • Enter the following diagnostic mode on the scan tool: TCCM Self-Test.

    Are any DTCs present? 

    Yes  REFER to the TCCM DTC Chart . After the repair is complete, CLEAR the DTC s.
    No  GO to  Y4.

  9. Y4 CHECK TCCM BRAKE ON/OFF (4X4_BOO) PID

    • Enter the following diagnostic mode on the scan tool: TCCM DataLogger.
    • Monitor the 4X4_BOO PID while pressing the brake pedal.

    Does the PID agree with the brake pedal position? 

    Yes  GO to  Y5.
    No  REFER to Exterior Lighting to diagnose stoplamp system faults. After the repair is complete, CLEAR the DTC s.

  10. Y5 CHECK THE TCCM IGNITION POSITION (KEY_POS_4X4) PID

    • Enter the following diagnostic mode on the scan tool: TCCM DataLogger.
    • Monitor the KEY_POS_4X4 PID with the ignition in the ON position.

    Does the PID indicate Ignition On? 

    Yes  GO to  Y6.
    No  REFER to Steering Column Switches for further diagnosis of the ignition switch.

  11. Y6 CHECK THE TCCM NEUTRAL INDICATOR (NEUTRAL) PID

    • Enter the following diagnostic mode on the scan tool: TCCM DataLogger.
    • Monitor the NEUTRAL PID with the gear selector in neutral position.

    Does the PID indicate TRUE? 

    Yes  GO to Pinpoint Test D  to diagnose the transfer case shift motor.
    No  REFER to Automatic Transaxle Transmission 6R80 for diagnosis of the TR sensor.
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