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PINPOINT TEST F : The Power Liftgate Does Not Power Close (Power Open Ok)

  1. F1 CHECK THE MANUAL OPERATION OF THE LIFTGATE

    • While manually opening and closing the liftgate, check the liftgate for:
      • liftgate/wedge alignment
      • strut operation (struts should push liftgate open when beyond half open)
      • hinges (should move freely)

    Does the liftgate open and close correctly? 

    Yes  GO to  F2.
    No  REPAIR and ALIGN as necessary. Refer to Liftgate Alignment .

  2. F2 CHECK THE LIFTGATE LEFT/RIGHT PINCH STRIP STATUS (LFT_PINCH / RT_PINCH) OPERATION

    • Using the scan tool, view the LTM PIDs.
    • Monitor the LTM PIDs LFT_PINCH and RT_PINCH while activating the left and right pinch strips.

    Do the PIDs states change/agree with the pinch strip status? 

    Yes  GO to  F10.
    No  GO to  F3.

  3. F3 CHECK THE PINCH STRIP SIGNAL CIRCUIT

    • Disconnect: Inoperative Pinch Strip.
    • For an inoperative left pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4172-1
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For an inoperative right pinch strip, measure
      Positive Lead Measurement / Action Negative Lead
      C4173-1
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage approximately 5 volts? 

    Yes  GO to  F7.
    No  If the voltage measured was greater than 5 volts, GO to  F4. If the voltage measured was less than 5 volts, GO to  F5.

  4. F4 CHECK THE PINCH STRIP SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: LTM C4174B.
    • Ignition ON.
    • For an inoperative left pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4172-1
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For an inoperative right pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4173-1
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit in question.
    No  GO to  F5.

  5. F5 CHECK THE PINCH STRIP SIGNAL CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Disconnect: LTM C4174B.
    • For an inoperative left pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4172-1
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For an inoperative right pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4173-1
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  F6.
    No  REPAIR the circuit in question.

  6. F6 CHECK THE PINCH STRIP SIGNAL CIRCUIT FOR AN OPEN

    • For an inoperative left pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4172-1
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C4174B-12
    • For an inoperative right pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4173-1
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C4174B-14

    Is the resistance less than 3 ohms? 

    Yes  GO to  F11.
    No  REPAIR the circuit in question.

  7. F7 CHECK THE PINCH STRIP RETURN CIRCUIT

    • Ignition ON.
    • For an inoperative left pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4172-1
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 C4172-2
    • For an inoperative right pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4173-1
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 C4173-2

    Is the voltage approximately 5 volts? 

    Yes  INSTALL a new pinch strip for the pinch strip in question. Refer to Pinch Strip Switch .
    No  GO to  F8.

  8. F8 CHECK THE PINCH STRIP RETURN CIRCUIT FOR SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: LTM C4174B.
    • Ignition ON.
    • For an inoperative left pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4172-2
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground
    • For an inoperative right pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4173-2
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  F9.

  9. F9 CHECK THE PINCH STRIP RETURN CIRCUIT FOR AN OPEN

    • For an inoperative left pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4172-2
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C4174B-21
    • For an inoperative right pinch strip, measure:
      Positive Lead Measurement / Action Negative Lead
      C4173-2
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C4174B-21

    Is the resistance less than 3 ohms? 

    Yes  GO to  F11.
    No  REPAIR the circuit.

  10. F10 CHECK THE DETENT AND FORKBOLT SWITCH PIDs

    • Using the scan tool, view LTM PIDs.
    • Operate the liftgate manually while monitoring the LTM PIDs :
      • Detent Switch Status (DETENTSW)
      • Forkbolt Switch Status (FORKBLT_S)
      • Forkbolt Secondary Switch (FKSWSEC)
    • Begin with the liftgate in the open position, then slowly close the liftgate into each of the latch positions specified.
      Liftgate Latch Position DETENTSW FORKBLT_S FKSWSEC
      Fully unlatched Inactive Active Active
      Primary Active Inactive Inactive

    Do the switch states agree with the table? 

    Yes  GO to  F11.
    No  GO to Pinpoint Test L .

  11. F11 CHECK FOR CORRECT LTM OPERATION

    • Ignition OFF.
    • Disconnect and inspect all LTM connectors.
    • 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 all the LTM connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new LTM. Refer to Liftgate/Trunk Module (LTM) .
    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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