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Pinpoint Test N: Battery Current Sensor Faults

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Normal Operation and Fault Conditions 

    CHECK the vehicle service history for recent service actions related to this module.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    BCM B130C:12 Load Shed Control: Circuit Short To Battery This DTC sets in the BCM when the BCM senses a short in the battery current sensor control circuit.
    BCM B130C:14 Load Shed Control: Circuit Short To Ground Or Open This DTC sets in the BCM when the BCM senses an open or ground in the battery current sensor control circuit.
    BCM B1438:03 Battery Current Sensor: Frequency Modulated / Pulse Width Modulated Failures This DTC sets in the BCM when the BCM does not indicate current from the battery current sensor.

    Possible Sources 

    • Battery current sensor
    • Wiring, terminals or connectors

    Visual Inspection and Pre-checks 

    • Inspect the battery current sensor
    • Inspect the battery current sensor connector

  2. NOTE: Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.
  3. NOTE: Do not have a battery charger attached during vehicle testing.

  4. N1 CHECK THE BATTERY CURRENT SENSOR

    • Inspect the battery current sensor for the following:

      • physical damage
      • corrosion
      • disconnected electrical connector
      • battery ground cable routed through the battery current sensor
      • debris between the battery current sensor and the battery ground cable

    Are any of these conditions found during inspection? 

    Yes  REPAIR as necessary or INSTALL a new battery current sensor. REFER to: Battery Current Sensor .
    No  GO to  N2

  5. N2 CHECK THE BATTERY CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT

    • Ignition OFF.

    • Disconnect Battery current sensor C3888.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-1
      GFD560645Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage between 4.8 and 5.2 volts? 

    Yes  GO to  N6
    No  If the voltage is less than 4.8 volts, GO to  N4 If the voltage is greater than 5.2 volts, GO to  N3

  6. N3 CHECK THE BATTERY CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect BCM C2280F.

    • Using the Terminal Release Kit, release and temporarily remove BCM C2280F-3.

    • Connect BCM C2280F.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-1
      GFD560645Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  INSTALL C2280F-3 and GO to  N14

  7. N4 CHECK THE BATTERY CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect BCM C2280F.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-1
      GFD560648Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  N5
    No  REPAIR the circuit.

  8. N5 CHECK THE BATTERY CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-1
      GFD560648Courtesy of FORD MOTOR COMPANY
      		 C2280F-3

    Is the resistance less than 3 ohms? 

    Yes  GO to  N13
    No  REPAIR the circuit.

  9. N6 CHECK THE BATTERY CURRENT SENSOR SIGNAL RETURN CIRCUIT

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-1
      GFD560645Courtesy of FORD MOTOR COMPANY
      		 C3888-2

    Is the voltage between 4.8 and 5.2 volts? 

    Yes  GO to  N9
    No  GO to  N7

  10. N7 CHECK THE BATTERY CURRENT SENSOR SIGNAL RETURN CIRCUIT FOR VOLTAGE

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-2
      GFD560645Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  N8

  11. N8 CHECK THE BATTERY CURRENT SENSOR SIGNAL RETURN CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect BCM C2280F.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-2
      GFD560648Courtesy of FORD MOTOR COMPANY
      		 C2280F-19

    Is the resistance less than 3 ohms? 

    Yes  GO to  N13
    No  REPAIR the circuit.

  12. N9 CHECK THE BATTERY CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect BCM C2280F.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-3
      GFD560645Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  N10

  13. N10 CHECK THE BATTERY CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect BCM C2280F.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-3
      GFD560648Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  N11
    No  REPAIR the circuit.

  14. N11 CHECK THE BATTERY CURRENT SENSOR FEEDBACK CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-3
      GFD560648Courtesy of FORD MOTOR COMPANY
      		 C2280F-8

    Is the resistance less than 3 ohms? 

    Yes  GO to  N12
    No  REPAIR the circuit.

  15. N12 CHECK THE BATTERY CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO THE SIGNAL RETURN OR REFERENCE CIRCUIT

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3888-3
      GFD560648Courtesy of FORD MOTOR COMPANY
      		 C3888-1
      C3888-3
      GFD560648Courtesy of FORD MOTOR COMPANY
      		 C3888-2

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  N13
    No  REPAIR the affected circuit.

  16. N13 CHECK THE BATTERY CURRENT SENSOR CONNECTION

    • Ignition OFF.

    • Disconnect Battery Current Sensor C3888, if necessary.

    • Inspect the battery current sensor connector for:

      • 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

    • Connect Battery Current Sensor C3888.

    • Connect BCM C2280F.

    • Ignition ON.

    • Using a diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs) in all modules.

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

    Did the DTC return? 

    Yes  REPAIR as necessary or INSTALL a new battery current sensor. REFER to: Battery Current Sensor . CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the DTC returns, GO to  N14
    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.

  17. N14 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all BCM connectors.

    • 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

    • Connect all  connectors. 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 BCM. REFER to: Body Control Module (BCM) .
    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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