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Home >> Ford >> 2022 >> F-150 Lightning Pro >> Repair and Diagnosis >> Electrical >> Gauges >> Instrumentation, Message Center And Warning Chimes (Diagnosis And Testing, General Procedures, Removal And Installation) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test Cm: The Key-In-Ignition Warning Chime Is Inoperative

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

  1. Refer to INSTRUMENT CLUSTER for schematic and connector information.

    Normal Operation and Fault Conditions 

    See Key-In-Ignition Warning Chime. REFER to: Warning Chimes - System Operation and Component Description

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    BCM B10F1:14 Key In Switch: Circuit Short To Ground Or Open A continuous and on-demand DTC that sets in the BCM if an open is detected on the key-in-ignition switch input with the ignition ON.

    Possible Sources 

    • Wiring, terminals or connectors
    • Interior lighting concern
    • Key-in-ignition switch (part of the ignition switch)
    • BCM
    • GWM
    • IPC

  2. CM1 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  CM2
    No  GO to Pinpoint Test A 
  3. CM2 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  CM3
    No  REFER to: Interior Lighting
  4. CM3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Controller Area Network (CAN) Module Communications Network
    No  GO to  CM4
  5. CM4 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  CM5
    No  GO to  CM8
  6. CM5 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR VOLTAGE

    • Ignition OFF.

    • Insert the key into the ignition cylinder.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-38
      GFD685447Courtesy of FORD MOTOR COMPANY
      Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  CM8
    No  GO to  CM6
  7. CM6 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
      GFD685445Courtesy of FORD MOTOR COMPANY
      Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  CM7
    No  REPAIR the circuit.
  8. CM7 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR OPEN

    • Disconnect Ignition Switch C250 .

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2280B-38
      GFD685445Courtesy of FORD MOTOR COMPANY
      C250-3

    Is the resistance less than 3 ohms? 

    Yes  REPAIR the circuit.
    No  DIAGNOSE the ignition switch. REFER to: Steering Wheel and Column Electrical Components
  9. CM8 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the 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 On-Line Automotive Service Information System (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.