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Pinpoint Test AO: The Door, Hood Or Luggage Compartment Lid Ajar RTT (RECONFIGURABLE Telltale) Is Never Or Always On

  1. Refer to Interior Lamps for schematic and connector information.

    Normal Operation and Fault Conditions 

    See Door Ajar RTT. REFER to: Message Center - System Operation and Component Description .

    If the driver door ajar status, passenger door ajar status, hood ajar status or luggage compartment lid ajar messages are missing for less than 5 seconds, the IPC defaults all door and luggage compartment lid ajar message center displays to the last indication state (on or off), based upon the last message received.

    If the driver door ajar status, passenger door ajar status, hood ajar status or luggage compartment lid ajar messages are missing for 5 seconds or longer, the IPC defaults all door and luggage compartment lid ajar message center displays off.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    BCM B1178:01 Boot/Trunk Ajar Switch: General Electrical Failure An on-demand DTC that sets in the BCM if the BCM detects an open on the luggage compartment lid ajar input.

    Possible Sources 

    • Wiring, terminals or connectors
    • Interior lighting concern
    • Luggage compartment lid latch ajar switch (part of the luggage compartment lid latch)
    • Communication concern
    • BCM concern
    • GWM concern
    • IPC

  2. AO1 CHECK THE MESSAGE CENTER OPERATION

    • Ignition OFF.

    • Disconnect GWM C2431.

    • Ignition ON.

    • Monitor the message center messages and RTT indicators.

    Did multiple message center messages and RTT indicators appear? 

    Yes  GO to  AO2
    No  INSTALL a new IPC. Refer to Instrument Panel Cluster (IPC) .

  3. AO2 CHECK THE INTERIOR LIGHTING OPERATION

    • Open and close each door while monitoring the interior lamps.

    Do the interior lamps operate correctly with each door? 

    Yes  GO to  AO3
    No  REFER to: Interior Lighting

  4. AO3 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

    • Using a diagnostic scan tool, perform the IPC self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to DTC Chart: Instrument Panel Cluster (IPC) .
    No  GO to  AO4

  5. AO4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CMDTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Communications Network
    No  GO to  AO5

  6. AO5 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST

    • Using a diagnostic scan tool, perform the BCM self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  For DTC B1178:01, GO to  AO6 For all other Diagnostic Trouble Codes (DTCs), REFER to: Body Control Module (BCM)
    No  For a door ajar indication concern, INSTALL a new BCM. Refer to Body Control Module (BCM) .
    For the luggage compartment lid ajar indication, GO to  AO6 For the hood ajar indication never on, DIAGNOSE the perimeter alarm does not arm from the hood ajar switch. REFER to: Perimeter Anti-Theft Alarm . For the hood ajar indication always on, DIAGNOSE any hood ajar Diagnostic Trouble Codes (DTCs). REFER to: Perimeter Anti-Theft Alarm

  7. AO6 CHECK THE LUGGAGE COMPARTMENT LID AJAR INPUT CIRCUIT FOR AN OPEN AT THE BCM (BODY CONTROL MODULE)

    • Ignition OFF.

    • Disconnect BCM C2280E.

    • NOTE: Make sure the luggage compartment lid is fully closed before proceeding with this test step.

      Measure:

      Positive Lead Measurement / Action Negative Lead
      C2280E-34
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  AO10
    No  GO to  AO7

  8. AO7 BYPASS THE LUGGAGE COMPARTMENT LID AJAR SWITCH AND CHECK FOR OPEN AT THE BCM (BODY CONTROL MODULE)

    • Disconnect Luggage Compartment Lid Latch C4339.

    • Connect a fused jumper wire:
      Lead 1 Measurement / Action Lead 2
      C4339-1
      GFD604414Courtesy of FORD MOTOR COMPANY
      		 C4339-4

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280E-34
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  REMOVE the fused jumper wire. INSTALL a new luggage compartment latch.
    No  REMOVE the fused jumper wire. GO to  AO8

  9. AO8 CHECK THE LUGGAGE COMPARTMENT LID LATCH GROUND CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C4339-4
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  AO9
    No  REPAIR the circuit.

  10. AO9 CHECK THE LUGGAGE COMPARTMENT AJAR INPUT CIRCUIT FOR AN OPEN BETWEEN THE BCM (BODY CONTROL MODULE) AND THE LUGGAGE COMPARTMENT LID LATCH

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280E-34
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 C4339-1

    Is the resistance less than 3 ohms? 

    Yes  GO to  AO12
    No  REPAIR the circuit.

  11. AO10 CHECK THE LUGGAGE COMPARTMENT AJAR INPUT CIRCUIT FOR A SHORT TO GROUND AT THE BCM (BODY CONTROL MODULE)

    • Ignition OFF.

    • Disconnect BCM C2280E.

    • Open the luggage compartment lid.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280E-34
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AO12
    No  GO to  AO11

  12. AO11 CHECK THE LUGGAGE COMPARTMENT AJAR INPUT CIRCUIT FOR A SHORT TO GROUND AT THE BCM (BODY CONTROL MODULE) WITH THE LUGGAGE COMPARTMENT LID LATCH DISCONNECTED

    • Disconnect Luggage Compartment Lid Latch C4339.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280E-34
      GFD604413Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new luggage compartment lid latch.
    No  REPAIR the circuit.

  13. AO12 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all BCM 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 the BCM 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 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 BCM. Refer to Body Control Module (BCM) .
    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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