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Pinpoint Test AU: DTC B1318 Or DTC U3003:16 (FCIM)

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. 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.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .
  1. AU1 RECHECK THE FCIM DTCs 
    • Clear the FCIM  DTCs.
    • Ignition OFF.
    • Ignition ON.
    • Wait at least 15 seconds.
    • Repeat the FCIM  self-test.
    • Is DTC B1318 or DTC U3003:16 still present? 
    • Yes  : GO to  AU2.
    • No  : The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition.
  2. AU2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM 
    • Retrieve the continuous memory DTCs from all modules.
    • Is DTC P0620, P0622, P0625, or P065B set in the PCM? 
  3. AU3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE 
    • Check the battery condition and verify that the battery is fully charged. Refer to BATTERY, MOUNTING AND CABLES .
    • Is the battery OK and fully charged? 
  4. AU4 CHECK THE FCIM VOLTAGE SUPPLY 
    • Ignition OFF.
    • Measure and record the voltage at the battery.
    • Disconnect: FCIM  C2403 (Fusion/Milan Without Navigation), C2408 (Fusion/Milan With Navigation), or C2402 (MKZ).
    • Ignition ON.
    • Measure the voltage between the FCIM  , harness side and ground as follows:
      TERMINAL VOLTAGE REFERENCE

      Vehicle Equipment Positive Meter Lead Negative Meter Lead
      Fusion/Milan without navigation C2403-1 SBP14 (BN/RD) Ground
      Fusion/Milan with navigation C2408-1 SBP14 (BN/RD) Ground
      MKZ C2402-5 SBP14 (BN/RD) Ground
      Fig 1: Measuring Voltage Between FCIM And Ground
      G06263174Courtesy of FORD MOTOR CO.
    • Is the voltage within 0.2 volt of the recorded battery voltage? 
    • Yes  : GO to  AU5.
    • No  : REPAIR the circuit for high resistance. CLEAR the DTC. REPEAT the self-test.
  5. AU5 CHECK THE FCIM GROUND CIRCUIT FOR CONTINUITY 
    • Ignition OFF.
    • Disconnect: Negative Battery Cable.
    • Measure the resistance between the FCIM  , harness side and ground as follows:
      TERMINAL RESISTANCE REFERENCE

      Vehicle Equipment Positive Meter Lead Negative Meter Lead
      Fusion/Milan without navigation C2403-2 GD116 (BK/VT) Ground
      Fusion/Milan with navigation C2408-4 GD116 (BK/VT) Ground
      MKZ C2402-8 GD116 (BK/VT) Ground
      Fig 2: Measuring Resistance Between FCIM And Ground
      G06263175Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to  AU6.
    • No  : REPAIR the circuit for high resistance. TEST the system for normal operation.
  6. AU6 CHECK FOR CORRECT FCIM OPERATION 
    • Disconnect the FCIM  connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the FCIM  connector and make sure it seats correctly.
    • Is the concern still present? 
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