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Home >> Ford >> 2021 >> Expedition XL, 4WD >> 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 Bk: The Key-In-Ignition Warning Chime Is Inoperative >> Pinpoint Test Bk: The Key-In-Ignition Warning Chime Is Inoperative

Pinpoint Test Bk: The Key-In-Ignition Warning Chime Is Inoperative

  1. BK1 CHECK THE SEATBELT WARNING CHIME OPERATION

    • Ignition OFF.

    • Ignition ON.

    • Monitor the seatbelt warning chime when the ignition switch is transitioned from OFF to RUN for 6 seconds.

    Does the seatbelt warning chime operate for approximately 6 seconds? 

    Yes  GO to  BK2
    No  GO to Pinpoint Test BQ 

  2. BK2 CHECK THE INTERIOR LAMPS OPERATION

    • Open and close the driver door.

    • Observe the interior lamps.

    Do the interior lamps operate correctly from the driver door? 

    Yes  GO to  BK3
    No  Refer to: Interior Lighting .

  3. BK3 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  BK4

  4. BK4 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST

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

    Is DTC B10F1:14 present? 

    Yes  GO to  BK5
    No  GO to  BK9

  5. BK5 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR VOLTAGE

    • Ignition OFF.

    • Insert the key into the ignition cylinder.

    • Disconnect BCM C2280B.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-38
      GFD582388Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  BK9
    No  GO to  BK6

  6. BK6 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR SHORT TO GROUND

    • Remove the key from the ignition cylinder.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-38
      GFD582389Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  BK7
    No  REPAIR the circuit.

  7. BK7 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR OPEN

    • Disconnect Ignition Switch C250.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-38
      GFD582389Courtesy of FORD MOTOR COMPANY
      		 C250-5

    Is the resistance less than 3 ohms? 

    Yes  GO to  BK8
    No  REPAIR the circuit.

  8. BK8 CHECK THE IGNITION SWITCH

    • Perform the ignition switch component test.

    Is the ignition switch OK? 

    Yes  INSTALL a new ignition lock cylinder housing.
    No  INSTALL a new ignition switch. Refer to: Ignition Switch .

  9. BK9 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 verify 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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