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Home >> Ford >> 2021 >> Mustang Mach 1, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrumentation, Message Center And Warning Chimes (2 Of 2) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test BC: The Check Fuel Fill Inlet Message Is Always Displayed

Pinpoint Test BC: The Check Fuel Fill Inlet Message Is Always Displayed

  1. Normal Operation and Fault Conditions 

    See Check Fuel Fill Inlet Message. REFER to: Message Center - System Operation and Component Description .

    If the fuel fill inlet message display message is missing for less than 5 seconds, the IPC defaults the check fuel fill inlet message center message to the last indication state, based upon the last message received.

    If the fuel fill inlet message display message request is missing for 5 seconds or longer, the IPC defaults the check fuel fill inlet message center message off.

    Possible Sources 

    • Evaporative emissions system concern
    • GWM concern
    • PCM
    • IPC

  2. BC1 CHECK THE MESSAGE CENTER OPERATION

    • Ignition ON.

    • Close all doors, the hood and luggage compartment lid.

    • Clear all message center warnings by pressing the OK button for each warning present.

    • Monitor the door ajar RTT.

    • Open the driver door.

    • Clear the message center popup warning.

    • Monitor the door ajar RTT.

    Is the door ajar RTT off with the door closed, and on with the door open? 

    Yes  GO to  BC2
    No  INSTALL a new IPC. Refer to Instrument Panel Cluster (IPC) .
  3. BC2 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  BC3
  4. BC3 RETRIEVE THE RECORDED DTCS FROM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST

    • Ignition ON.

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to the appropriate Electronic Engine Controls article.
    No  GO to  BC4
  5. BC4 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  If the check fuel fill inlet message is never on, the system is operating correctly at this time. There are currently no vehicle concerns present that require the check fuel fill inlet message display. If the check fuel fill inlet message is always on, Refer to PCM Guided Routine .