LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2019 >> Mustang EcoBoost Premium, 2D Convertible, Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Handles, Locks, Latches And Entry Systems >> Diagnosis And Testing >> Locks, Latches and Entry Systems >> Pinpoint Tests >> Pinpoint Test T : The Luggage Compartment Lid Passive Entry Feature Is Inoperative >> Pinpoint Test T : The Luggage Compartment Lid Passive Entry Feature Is Inoperative
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Pinpoint Test T : The Luggage Compartment Lid Passive Entry Feature Is Inoperative

  1. T1 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SWITCH INPUT

    • Close the luggage compartment lid.

    • Ignition ON.

    • Unlock the doors using the door lock control switch.

    • Press the luggage compartment lid release button.

    Does the luggage compartment lid latch release? 

    Yes  GO to  T2
    No  GO to Pinpoint Test N 
  2. T2 CHECK THE RKE (REMOTE KEYLESS ENTRY) OPERATION

    • Ignition OFF.

    • Close the luggage compartment lid.

    • Press the luggage compartment lid release button twice on a valid programmed key.

    Does the luggage compartment lid latch release? 

    Yes  GO to  T3
    No  GO to Pinpoint Test O 
  3. T3 CHECK THE KEYLESS ENTRY REAR ANTENNA

    • Ignition OFF.

    • Disconnect Keyless Entry Rear Antenna C4378.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      GFD392059Courtesy of FORD MOTOR COMPANY

      C4378, pin 1, component side
      GFD392054Courtesy of FORD MOTOR COMPANY
      GFD392059Courtesy of FORD MOTOR COMPANY

      C4378, pin 2, component side

    Is the resistance between 1 and 3 ohms? 

    Yes  GO to  T4
    No  INSTALL a new keyless entry rear antenna. REFER to: Keyless Entry Rear Antenna .
  4. T4 CHECK THE KEYLESS ENTRY REAR ANTENNA CIRCUITS FOR A SHORT TO VOLTAGE

    • Disconnect BCM C2280D.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4378-1
      GFD392057Courtesy of FORD MOTOR COMPANY
      Ground
      C4378-2
      GFD392057Courtesy of FORD MOTOR COMPANY
      Ground

    Is any voltage present? 

    Yes  REPAIR the circuit in question.
    No  GO to  T5
  5. T5 CHECK THE KEYLESS ENTRY REAR ANTENNA CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4378-1
      GFD392054Courtesy of FORD MOTOR COMPANY
      Ground
      C4378-2
      GFD392054Courtesy of FORD MOTOR COMPANY
      Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  T6
    No  REPAIR the circuit in question.
  6. T6 CHECK THE KEYLESS ENTRY REAR ANTENNA CIRCUITS FOR AN OPEN

    Are the resistances less than 3 ohms? 

    Yes  GO to  T7
    No  REPAIR the circuit in question.
  7. T7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Disconnect and inspect all the BCM connectors.

    • Repair:

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

    • Reconnect the BCM connectors and 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to BCM Guided Routine .
    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.