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Pinpoint Test S: U3003:17

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  1. Refer to Wiring Diagrams Headlamps/Autolamps for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Exterior Lighting - Overview . REFER to: Exterior Lighting - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    HCM U3003:17 Battery Voltage: Circuit Voltage Above Threshold A continuous memory and on-demand DTC that sets in the HCM if the HCM detects high battery voltage on the voltage supply input.

    Possible Sources 

    • Charging system concern
    • HCM

  2. S1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) P0563 (PCM (POWERTRAIN CONTROL MODULE)), U3003:17 OR U3006:17 SET IN OTHER MODULES

    • Ignition ON.

    • Using a diagnostic scan tool, retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

    Is DTC U3003:17, U3006:17 or P0563 (PCM) set in more than one module? 

    Yes  Diagnose the PCMDTC. For 2.7L EcoBoost, REFER to: Electronic Engine Controls . For 3.3L Duratec-V6, REFER to: Electronic Engine Controls . For 3.5L EcoBoost, REFER to: Electronic Engine Controls . For 3.5L V6 PowerBoost, REFER to: Electronic Engine Controls . For 5.0L 32V Ti-VCT, REFER to: Electronic Engine Controls . For 3.0L Power Stroke Diesel, REFER to: Electronic Engine Controls .
    No  GO to  S2

  3. S2 CHECK THE BATTERY VOLTAGE

    • Turn off all interior/exterior lights and accessories.

    • Start and run the engine at approximately 2, 000 RPM for 3 minutes while monitoring the battery voltage.

    Does the battery voltage rise to 15.9 volts or higher? 

    Yes  Diagnose the charging system. REFER to: Charging System - 2.7L EcoBoost (238kW/324PS)/3.5L EcoBoost (BM) . REFER to: Charging System - 3.3L Duratec-V6/5.0L 32V Ti-VCT . REFER to: Charging System - 3.0L Power Stroke Diesel .
    No  GO to  S3

  4. S3 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:17

    • Turn the engine off.

    • Ignition ON.

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

    • Clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

    • Carry out the HCM self-test.

    Is DTC U3003:17 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 HCM. REFER to: Headlamp Control Module (HCM) .
    No  The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.
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