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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 Cw: U3003:16

Pinpoint Test Cw: U3003:16

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

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    ICM U3003:16 Battery Voltage: Circuit Voltage Below Threshold Sets in the ICM in continuous memory if the ICM detects battery voltage below 9 volts on the voltage supply circuit for 5 seconds or longer.

    Possible Sources 

    • Wiring, terminals or connectors
    • High circuit resistance
    • Charging system concern
    • ICM

  2. CW1 RECHECK THE ICM (INFORMATION CENTER MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).

    • Wait 10 seconds.

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

    Is DTC U3003:16 still present? 

    Yes  GO to  CW2
    No  Clear the DTC. The system is operating correctly at this time. The DTC may have been set due to a previous low battery voltage condition.

  3. CW2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE BCM (BODY CONTROL MODULE)

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

    Are any charging system Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Body Control Module (BCM)
    No  GO to  CW3

  4. CW3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

    • Check the battery condition and verify the battery is fully charged. REFER to: Battery

    Is the battery OK and fully charged? 

    Yes  GO to  CW4
    No  If the battery is discharged, DIAGNOSE the cause of the low battery condition. REFER to: Battery

  5. CW4 CHECK THE ICM (INFORMATION CENTER MODULE) VOLTAGE SUPPLY

    • Ignition OFF.

    • Disconnect ICM C2114.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2114-1
      GFD604412Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage within 0.2 volt of the recorded battery voltage? 

    Yes  GO to  CW5
    No  REPAIR the circuit for high circuit resistance.

  6. CW5 CHECK THE ICM (INFORMATION CENTER MODULE) GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2114-1
      GFD604412Courtesy of FORD MOTOR COMPANY
      		 C2114-4

    Is the voltage greater than 11 volts? 

    Yes  GO to  CW6
    No  REPAIR the circuit for high circuit resistance.

  7. CW6 CHECK FOR CORRECT ICM (INFORMATION CENTER MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the ICM connector.

    • 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 ICM connector. Make sure it seats and latches 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 ICM. REFER to: Information Center Module (ICM) 
    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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