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Home >> Ford >> 2021 >> Mustang Mach 1, Automatic Trans >> Repair and Diagnosis >> Electrical >> Gauges >> Instrumentation, Message Center And Warning Chimes (2 Of 2) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test BJ: The Chime Always Sounds

Pinpoint Test BJ: The Chime Always Sounds

  1. Refer to Instrument Cluster for schematic and connector information.

    Normal Operation and Fault Conditions 

    See PRNDL Not In Park Warning Chime, Ignition-Engine On Warning Chime and Headlamps On Warning Chime. REFER to: Message Center - System Operation and Component Description .

    Possible Sources 

    • Exterior lighting concern
    • Interior lighting concern
    • PRNDL indication concern
    • BCM concern
    • IPC

  2. BJ1 CHECK THE IPC (INSTRUMENT PANEL CLUSTER) FOR MESSAGE CENTER MESSAGES

    • Ignition OFF.

    • Ignition ON.

    • Check the IPC and message center for illuminated warning indicator or message center displays.

    Does the IPC have any RTTs illuminated or message center messages displayed? 

    Yes  REPAIR all message center indication concerns first. REFER to Symptom Chart: Instrument Panel Cluster (IPC) or Symptom Chart: Information And Message Center, in Symptom Chart(s) .
    No  GO to  BJ2

  3. BJ2 CHECK THE EXTERIOR LIGHTING OPERATION

    • Place the headlamp switch in the OFF position.

    • Close all doors.

    • Wait one minute.

    • Observe the exterior lights.

    Are the headlamps and parking lamps off? 

    Yes  GO to  BJ3
    No  REFER to: Headlamps . REFER to: Parking, Rear and License Plate Lamps

  4. BJ3 CHECK THE INTERIOR LIGHTING OPERATION

    • Open and close the driver door.

    • Observe the interior lights.

    Do the interior lights operate correctly from the driver door? 

    Yes  If equipped with a manual transmission, GO to  BJ5 If equipped with an automatic transmission, GO to  BJ4
    No  REFER to: Interior Lighting

  5. BJ4 CHECK THE PRNDL OPERATION

    • Verify the PRNDL indicates PARK (P) when selector lever is in PARK (P).

    Does the PRNDL indicate PARK (P) when the selector lever is in PARK (P)? 

    Yes  GO to  BJ5
    No  GO to Pinpoint Test X 

  6. BJ5 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  REFER to: Body Control Module (BCM)
    No  GO to  BJ6

  7. BJ6 CHECK THE BCM (BODY CONTROL MODULE) INPUT PIDS FROM THE IGNITION SWITCH

    • Using a diagnostic scan tool, view the BCM Parameter Identifications (PIDs).

    • Select and monitor the BCM ignition switch (IGN_SW_ACC), (IGN_SW_RUN) and (IGN_SW_KEY_IN) Parameter Identifications (PIDs) while cycling the ignition switch through the ACC, OFF, and RUN states.

    Do the BCM Parameter Identifications (PIDs) match the ignition switch position? 

    Yes  INSTALL a new IPC. Refer to Instrument Panel Cluster (IPC) .
    No  DIAGNOSE the ignition switch inputs to the BCM. REFER to: Steering Wheel and Column Electrical Components
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