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Pinpoint Test A : U3003:16

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

  1. A1 RECHECK THE VDM Diagnostic Trouble Codes (DTCs)

    • Using a diagnostic scan tool, clear the VDM Diagnostic Trouble Codes (DTCs).
    • Ignition OFF.
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the VDM self-test.

    Is DTC U3003:16 still present? 

    Yes  GO to  A2.
    No  The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition. VERIFY the battery and charging system are OK. REFER to Charging System .

  2. A2 CHECK FOR CHARGING SYSTEM Diagnostic Trouble Codes (DTCs) PCM

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

    Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM ? 

    Yes  DIAGNOSE the vehicle charging concern. REFER to Diagnosis and Testing in Charging System .
    No  GO to  A3.

  3. A3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

    Did the battery pass the condition test? 

    Yes  If the battery passed the condition test but required a recharge, DIAGNOSE the charging system. REFER to Diagnosis and Testing in Charging System .If the battery passed the condition test and did not require a recharge, GO to  A4.
    No  INSTALL a new battery. REFER to Battery, Mounting and Cables .

  4. A4 CHECK THE VDM VOLTAGE (VDM_SUPPLY_V) PID

    • Ignition ON.
    • Measure and record the voltage at the battery.
    • Using a diagnostic scan tool, monitor the VDM_Supply_V PID.

    Does the PID display within 0.2 volt of the recorded battery voltage? 

    Yes  GO to  A7.
    No  GO to  A5.

  5. A5 CHECK THE VDM VOLTAGE SUPPLY

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3672B-7
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage within 1 volt of the previously recorded battery voltage? 

    Yes  GO to  A6.
    No  VERIFY BCM fuse 33 (10A) is OK.If OK, REPAIR the affected circuit for high resistance or an open.If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the cause of the circuit short.

  6. A6 CHECK THE VDM GROUND CIRCUIT FOR AN OPEN

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3672A-6
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  A7.
    No  REPAIR the circuit.

  7. A7 CHECK FOR CORRECT VDM OPERATION

    • Ignition OFF.
    • Repair:
      • corrosion (install new connector or terminal - clean module pins)
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
    • Connect VDM C3672A and C3672B . Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new VDM. REFER to Vehicle Dynamics Module (VDM) .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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