Ford Explorer Quiz
Electrical

Diagnosis and Testing - Charging System

In this manual: Electrical
General Information — 41Chassis — 173Powertrain — 250Electrical — 303Body and Paint — 331
7steps
~42min
2/5difficulty
Done 0 of 7

Diagnostic Trouble Code (DTC) Chart

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Diagnostic Trouble Code Chart


Module Trouble Code Description Action
BCM B11DB:02 Battery Monitoring Module "A": General Signal Failure GO to Pinpoint Test F
BCM B11DB:08 Battery Monitor Module "A": Bus Signal/Message Failures GO to Pinpoint Test F
BCM B11DB:09 Battery Monitor Module "A": Component Failure GO to Pinpoint Test F
BCM B11DB:11 Battery Monitoring Module "A": Short to Ground GO to Pinpoint Test F
BCM B11DB:49 Battery Monitoring Module "A": Internal Electronic Failure GO to Pinpoint Test I
BCM B11DB:55 Battery Monitoring Module "A": Not Configured GO to Pinpoint Test J
BCM B11DB:9A Battery Monitoring Module "A": Component or System Operating Conditions GO to Pinpoint Test F
BCM B1438:03 Battery Current Sensor: FM (Frequency Modulated/Pulse Width Modulated) Failure GO to Pinpoint Test F
BCM B1489:11 Battery Monitor System (BMS) Sensor Power: Short to Ground GO to Pinpoint Test F
PCM P0562:00 System Low Voltage: No Sub-type Information GO to Pinpoint Test B
PCM P0563:00 System High Voltage: No Sub-type Information GO to Pinpoint Test A
PCM P065B:00 Alternator "A" Control Circuit Range/Performance: no subtype information GO to Pinpoint Test B
PCM P065C:00 Alternator "A" Mechanical Performance: no subtype information GO to Pinpoint Test B
PCM P065C:00 Alternator "A" Mechanical Performance: no subtype information GO to Pinpoint Test C
PCM P0A3B: 00 Alternator "A" Overheating: no subtype information GO to Pinpoint Test K
PCM P0A5A:00 Alternator Current Sensor Circuit Range/Performance: no subtype information GO to Pinpoint Test E
PCM P0A5B: 00 Alternator Current Sensor Circuit Low: no subtype information GO to Pinpoint Test E
PCM P0A5C:00 Alternator Current Sensor Circuit High: no subtype information GO to Pinpoint Test E
PCM U012D:00 Lost Communication With Alternator Control Module "A": no subtype information GO to Pinpoint Test G
PCM U042E:00 Invalid data received from generator control module "A": no sub-type information GO to Pinpoint Test G

Global Customer Symptom Codes (GCSC) Table

The diagnostics described in this manual assume a certain level of skill and knowledge of Ford diagnostic techniques.


Global Customer Symptom Code Table


Customer Symptom Action
Comfort and Entertainment > Audio > FM Radio > Inoperative GO to Pinpoint Test D

Inspection and Verification

  1. Verify the customer concern by operating the charging system.
  2. Before diagnosing or repairing the charging system, check the following:
  • Check the battery for loose, damaged or corroded connections.
  • Check the alternator for loose, damaged or corroded connections.
  • Check the engine and battery ground connections for loose, damaged or corroded connections.
  • Check the high-current BJB for loose or corroded connections.
  • Check the fuses or fusible links.
  • Inspect the wiring, terminals and connectors.
  1. Inspect the FEAD system.
    Refer to: Front End Accessory Drive (303-05A Front End Accessory Drive - 2.3 L EcoBoost (201 kW/273 L hp), Diagnosis and Testing).
  2. Check the battery condition and state of charge.
    Refer to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).
  3. Check for abnormal current draw with the ignition off.
    Refer to: Battery Drain Test (414-01 Battery, Mounting and Cables, General Procedures).
  4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  5. Using the diagnostic scan tool, retrieve all Diagnostic Trouble Codes (DTCs). Refer to the appropriate DTC chart in this section.

Symptom Chart

Symptom Chart: Charging System

The diagnostics in this manual assume a certain level of skill and knowledge of Ford-specific diagnostic techniques. For information on these techniques,
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Chart


Condition Possible Sources Action
System voltage is high. Refer to Pinpoint Test GO to Pinpoint Test A
System voltage is low or battery is discharged. Refer to Pinpoint Test GO to Pinpoint Test B
Generator is noisy. Refer to Pinpoint Test GO to Pinpoint Test C
Radio interference. Refer to Pinpoint Test GO to Pinpoint Test D
Charging system warning indicator never illuminates or is always illuminated.
  • PCM
  • Generator
  • PCM
  • Wiring, Terminals or Connectors
 RETRIEVE Diagnostic Trouble Codes (DTCs) from all modules. If any DTCs are present, refer to the DTC chart in this section. If no DTCs are present,
Refer to: Instrument Cluster, Message Center and Warning Chimes (413-01 Instrument Cluster, Message Center and Warning Chimes, Diagnosis and Testing).

Pinpoint Tests


DIAGNOSTIC TEST A: HIGH SYSTEM VOLTAGE

For circuit and connector information, refer to Wiring Diagrams Cell 12.

Normal Operation and Fault Symptoms

With the engine running, the charging system supplies voltage to the battery and vehicle electrical system through the high-current BJB and battery cable B+. The voltage supplied to the vehicle electrical system is used to operate various vehicle systems and modules. Many modules monitor this voltage and, if it rises above or falls below their calibrated set points, a DTC is set.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P0563:00 System High Voltage: No Sub-type Information This DTC is set in the PCM when the PCM detects charging system voltage above 15.9 V at vehicle speeds above 8 km/h.

Possible Sources

  • Battery
  • Generator
  • Engine, Generator or Battery Ground
  • PCM
  • Wiring, Terminals or Connectors

Visual Inspection and Pre-checks

  • Inspect grounds G105 and G106 for loose, damaged or corroded connections.
  • Inspect the high-current BJB for loose, damaged or corroded connections.
NOTE: Make sure the battery voltage is above 12.2 V before and during this precise test.
NOTE: Do not connect a battery charger during vehicle testing.
A1 INSPECT AND VERIFY CONCERN
  • Perform the Inspection and Verification procedure in this section.

Was an obvious cause for the observed or reported concern found?
Yes REPAIR the cause if necessary.
No GO to A2
A2 MONITOR THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID (PARAMETER IDENTIFICATION)
  • Start the engine.
  • Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs).
  • Monitor the PCM GENVDSD PID.

Does the PID show 15.9 volts or less?
Yes GO to A3
No GO to A9
A3 COMPARE THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID (PARAMETER IDENTIFICATION) TO BATTERY VOLTAGE
  • With the engine idling, measure and record:
    Positive lead Measurement/Action Negative lead
  • Using a diagnostic scan tool, view the PCM GENVDSD PID.

Is the recorded battery voltage within ±0.5 V of the PID?
Yes The system is currently operating correctly. The concern may have been caused by an intermittent loose or corroded connector. REPAIR the root cause of any connector or terminal concerns.
No GO to A4
A4 CHECK THE VEHICLE GROUND VOLTAGE DROP
  • With the engine idling, headlamps on and blower motor on high, measure the voltage drop between the generator housing and the battery negative terminal.
  • Measure and record:
    Positive lead Measurement/Action Negative lead
    Generator Housing

Is the voltage drop less than 0.5 volts?
Yes GO to A5
No CHECK and REPAIR the engine, generator or battery ground for corrosion.
A5 MONITOR THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID (PARAMETER IDENTIFICATION) DURING COMMANDED OPERATION
  • Using the diagnostic scan tool, view the PCM GENVDSD PID.
  • Using the diagnostic scan tool commanded function, set the PCM GENVDSD PID to 14 volts.
  • With the engine still idling, measure the battery and record:
    Positive lead Measurement/Action Negative lead

Is the recorded battery voltage within ±0.5 V of the PID?
Yes GO to A6
No INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
A6 GENERATOR OUTPUT CHECK
  • Increase the engine speed until the generator begins to produce output.
  • With the engine running, measure and record:
    Positive lead Measurement/Action Negative lead
    Ground

Is the voltage above 15.2 volts?
Yes INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
No GO to A7
A7 COMPARE PCM VPWR PID (PARAMETER IDENTIFICATION) TO BATTERY VOLTAGE
  • With the engine running at idle, measure and record:
    Positive lead Measurement/Action Negative lead
  • Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs).
  • Monitor the PCM PID VPWR.

Does the VPWR PID indicate battery voltage within ±0.5 V of the recorded battery voltage?
Yes INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
No GO to A8
A8 CHECK PCM (POWERTRAIN CONTROL MODULE) POWER SUPPLY CIRCUITS
  • Turn off the headlamps and the blower motor.
  • Ignition OFF.
  • Disconnect PCM C1381B (2.3 L EcoBoost), C1551B (3 L EcoBoost) or C175B (3.3 L Duratec).
  • The ignition is on.
  • Action:
    Click to display the connectors

    For 2.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1381B-100 Ground
    C1381B-101 Ground
    C1381B-102 Ground

    Click to display the connectors

    For 3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1551B-1 Ground
    C1551B-2 Ground
    C1551B-16 Ground

    Click to display the connectors

    For 3.3 L Duratec


    Positive lead Measurement/Action Negative lead
    C175B-1 Ground
    C175B-2 Ground
    C175B-16 Ground

Are the voltages within 0.5 volts of the recorded battery voltage?
Yes GO to A9
No REPAIR the faulty circuit(s).
A9 CHECK PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the PCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern,
Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST B: LOW SYSTEM VOLTAGE OR BATTERY DISCHARGED

For circuit and connector information, refer to Wiring Diagrams Cell 12.

Normal Operation and Fault Symptoms

With the engine running, the charging system supplies voltage to the battery and the vehicle electrical system through the high-current cable from the BJB and the battery B+. The PCM monitors this B+ voltage through the PCM VPWR or FPPWR circuits. If the charging system voltage is 1.5 volts or more below the required alternator voltage (GENVDSD), a DTC is set and the charging system MIL illuminates after 30 seconds.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P0562:00 System Low Voltage: No Sub-type Information If the voltage is 1.5 V or more below the required alternator voltage (calculated by the powertrain control module), this DTC is set after 30 seconds.
PCM P065B:00 Alternator "A" Control Circuit Range/Performance: no subtype information This DTC is set when the generator reports an internal regulator fault.
PCM P065C:00 Alternator "A" Mechanical Performance: no subtype information This DTC is set when the generator reports an internal mechanical fault.

Possible Sources

  • Battery
  • Fuses or fusible links
  • Generator
  • PCM
  • Wiring, Terminals or Connectors

Visual Inspection and Pre-checks

  • Inspect the FEAD system. REFER TO 303-05.
  • Check for abnormal current draw with the ignition off.
  • Inspect the battery.
  • Inspect the high-current BJB for loose, damaged or corroded connections.
  • Check the high-current fuse BJB 201 (275 A).
NOTE: Make sure the battery voltage is above 12.2 V before and during this precise test.
NOTE: Do not connect a battery charger during vehicle testing.
B1 PERFORM INSPECTION AND VERIFICATION
  • Perform the Inspection and Verification procedure in this section.

Was an obvious cause for the observed or reported concern found?
Yes REPAIR the cause if necessary.
No GO to B2
B2 RETRIEVE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, perform a PCM self-test.

Is DTC P065B, P065C, U012D or U042E present?
Yes If DTCs P065B and P065C are present, GO to Pinpoint Test C.
If P065B is present without P065C, INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation). If U012D or U042E is present, GO to Pinpoint Test G.
No GO to B3
B3 CHECK GENERATOR CONNECTIONS
  • Ignition OFF.
  • Disconnect all generator connectors and inspect:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the generator connectors. Make sure they are fully seated and locked.
  • Measure and record:
    Positive lead Measurement/Action Negative lead
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C102A-1 Ground

Is the voltage within 0.5 V of the recorded battery voltage?
Yes GO to B4
No TIGHTEN or INSTALL a new alternator B+ nut as necessary.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
CHECK the high-current BJB fuse 201 (275A) is OK. If OK, REPAIR the circuit. If not OK, refer to the Wiring Diagrams Manual to determine the possible causes of the short circuit.
B4 CHECK GENERATOR B+ CIRCUIT VOLTAGE DROP
  • Start the engine.
  • With the engine running at idle, headlamps on and blower motor on high, measure:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C102A-1
  • Perform a wiggle test on the generator wiring and connections while measuring the voltage drop.

Is the voltage drop less than 0.5 volts?
Yes GO to B5
No CHECK and REPAIR any corrosion in the generator B+ circuit or battery positive cable connections.
B5 CHECK VEHICLE GROUND VOLTAGE DROP
  • With the engine running at idle, headlamps on and blower motor on high, measure:
    Positive lead Measurement/Action Negative lead
    Generator Housing

Is the voltage drop less than 0.5 volts?
Yes GO to B6
No CHECK and REPAIR the engine, generator or battery ground for corrosion.
B6 MONITOR REQUIRED GENERATOR VOLTAGE (GENVDSD) PID (PARAMETER IDENTIFICATION) DURING COMMAND
  • Using the diagnostic scan tool, view the PCM GENVDSD PID.
  • Using the diagnostic scan tool commanded function, set the PCM GENVDSD PID to 14 volts.
  • With the engine still idling, measure the battery and record:
    Positive lead Measurement/Action Negative lead

Is the recorded battery voltage within ±0.5 V of the PID?
Yes GO to B7
No GO to B11
B7 COMPARE PCM VPWR PID (PARAMETER IDENTIFICATION) TO BATTERY VOLTAGE
  • With the engine running at idle, headlamps on and blower motor on high speed, measure and record:
    Positive lead Measurement/Action Negative lead
  • Using the diagnostic scan tool, view the PCM PID VPWR.

Does the VPWR PID indicate battery voltage within ±0.5 V of the recorded battery voltage?
Yes GO to B8
No REPAIR high resistance or loose connections in the faulty PCM power supply circuits.
B8 CHECK PCM (POWERTRAIN CONTROL MODULE) POWER SUPPLY CIRCUITS FOR VOLTAGE
  • Ignition OFF.
  • Disconnect PCM C1381B (2.3 L EcoBoost), C1551B (3 L EcoBoost) or C175B (3.3 L Duratec).
  • The ignition is on.
  • Measure and record:
    Click to display connectors

    For 2.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1381B-100 Ground
    C1381B-101 Ground
    C1381B-102 Ground

    Click to display the connectors

    For 3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1551B-1 Ground
    C1551B-2 Ground
    C1551B-16 Ground

    Click to display the connectors

    For 3.3 L Duratec


    Positive lead Measurement/Action Negative lead
    C175B-1 Ground
    C175B-2 Ground
    C175B-16 Ground

Are the voltages within 0.5 volts of the recorded battery voltage?
Yes GO to B9
No REPAIR the faulty circuit(s).
B9 CHECK PCM (POWERTRAIN CONTROL MODULE) GROUND FOR HIGH RESISTANCE
  • NOTE: Measure the battery voltage at the battery. With the engine still running at idle, turn off all auxiliary loads, measure and record:
    Positive lead Measurement/Action Negative lead
  • Using the diagnostic scan tool, view the PCM PID VPWR and record.
  • With the engine still running at idle, turn on the headlamps and turn on the blower motor to HIGH speed.
  • Measure and record:
    Positive lead Measurement/Action Negative lead
  • Using the diagnostic scan tool, view the PCM PID VPWR and record.

Does the VPWR PID indicate battery voltage within ±0.5 V with auxiliary loads on and off?
Yes GO to B10
No REPAIR the faulty PCM ground circuit(s).
B10 MONITOR POWER SUPPLY (VPWR) PID (PARAMETER IDENTIFICATION)
  • NOTE: Measure the battery voltage at the battery. With the engine still idling, turn off all auxiliary loads.
  • Measure and record:
    Positive lead Measurement/Action Negative lead
  • Using the diagnostic scan tool, view the PCM PID VPWR and record.
  • Briefly accelerate the engine to wide open throttle (WOT) and release. Repeat this step 4-5 times while continuing to monitor the PID.

Does the PID remain within 0.5 volts of the recorded battery voltage when engine speed (RPM) increases?
Yes The system is currently operating correctly. The concern may have been caused by a loose or corroded connector. INSPECT and REPAIR any connector or terminal concerns found. If no connector or terminal concerns are found, PERFORM the battery drain test.
Refer to: Battery Drain Test (414-01 Battery, Mounting and Cables, General Procedures).
No GO to B12
B11 CHECK ALTERNATOR DECOUPLER PULLEY OPERATION
  • Ignition OFF.
  • Perform the alternator decoupler pulley component check. GO to Pinpoint Test H.

Is the alternator decoupler pulley OK?
Yes INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
No INSTALL a new generator clutch.
Refer to: Generator Pulley (414-02 Generator and Regulator, Removal and Installation).
B12 CHECK PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the PCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern,
Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.
No The system is currently operating correctly. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
DIAGNOSTIC TEST C: ALTERNATOR NOISE OR MECHANICAL CONDITION

Normal Operation and Fault Symptoms

The generator is driven by the engine FEAD system. Several sources of generator noise exist, including: bearing noise, electrical fault noise, generator or pulley misalignment. Generators with certain diode or stator failures may also produce audible noise.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P065C:00 Alternator "A" Mechanical Performance: no subtype information This DTC is set when the generator reports an internal mechanical fault.

Possible Sources

  • FEAD belt
  • Loose bolts/brackets
  • Generator/pulleys

Visual Inspection and Pre-checks

  • Inspect the FEAD belt.
  • Inspect the bolts/brackets for loose bolts.
  • Inspect the generator/pulley.
C1 CHECK FOR ACCESSORY DRIVE BELT NOISE AND LOOSE BRACKET MOUNTING
  • Ignition OFF.
  • Inspect the FEAD belt and tensioner for damage and correct installation.
    Refer to: Front End Accessory Drive (303-05A Front End Accessory Drive - 2.3 L EcoBoost (201 kW/273 L hp), Diagnosis and Testing).

Is the accessory drive OK?
Yes GO to C2
No REPAIR as necessary.
C2 CHECK THE GENERATOR MOUNTING
  • Check the generator mounting for loose bolts or misalignment.

Is the generator installed correctly?
Yes GO to C3
No REPAIR as necessary.
C3 CHECK THE GENERATOR FOR NOISE
  • Start the engine.
  • With the engine running, use a stethoscope or equivalent listening device to check the generator and accessory drive area for abnormal mechanical noise.

Is the generator the source of the noise?
Yes INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
No Diagnose the engine noise source.
Refer to: Engine (303-00 Engine System - General Information, Diagnosis and Testing).
C4 CHECK ALTERNATOR DECOUPLER PULLEY OPERATION
  • Ignition OFF.
  • Perform the alternator decoupler pulley component check. GO to Pinpoint Test H.

Is the alternator decoupler pulley OK?
Yes INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
No INSTALL a new generator clutch.
Refer to: Generator Pulley (414-02 Generator and Regulator, Removal and Installation).
DIAGNOSTIC TEST D: RADIO INTERFERENCE

Normal Operation and Fault Symptoms

The generator radio suppression equipment reduces interference transmitted through the speakers by the vehicle electrical system.

Possible Sources

  • Generator
  • Vehicle entertainment system
  • Wiring, Terminals or Connectors

Visual Inspection and Pre-checks

  • Inspect the generator.
  • Inspect the vehicle entertainment system.
D1 DETERMINE IF THE GENERATOR IS THE SOURCE OF AUDIO SYSTEM INTERFERENCE
  • Start the engine.
  • Allow the engine to idle.
  • Tune the audio system to a station where interference is present.
  • Ignition OFF.
  • Disconnect alternator C102A.
  • Start the engine.
  • Allow the engine to idle.

Is interference present with the generator disconnected?
Yes CHECK the audio system. For the procedure, refer to the appropriate section in Group 415.
No INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
PINPOINT TEST E: GENERATOR CURRENT SENSOR FAULT

For circuit and connector information, refer to Cell 13 of the Wiring Diagrams.

Normal Operation and Fault Symptoms

The alternator current sensor is a Hall-effect sensor attached to the alternator B+ cable. The PCM supplies a 5-volt reference and ground. The PCM reads the alternator current sensor feedback voltage to determine the current flowing through the alternator B+ cable.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P0A5A: 00 Alternator Current Sensor Circuit Range/Performance: no subtype information Set in the PCM when the PCM does not detect current through the alternator current sensor and there is no alternator current sensor circuit DTC set.
PCM P0A5C: 00 Alternator Current Sensor Circuit High: no subtype information Set when the PCM detects a higher than expected voltage on the generator current sensor feedback circuit, indicating a short to voltage.
PCM P0A5B: 00 Alternator Current Sensor Circuit Low: no subtype information Set when the PCM detects a lower than expected voltage on the generator current sensor feedback circuit, indicating an open or a short to ground.

Possible Sources

  • Generator Current Sensor
  • PCM
  • Wiring, Terminals or Connectors

Visual Inspection and Pre-checks

  • Inspect the generator current sensor.
  • Inspect the generator current sensor connector.
NOTE: Make sure the battery voltage is above 12.2 V before and during this precise test.
NOTE: Do not connect a battery charger during vehicle testing.
E1 RETRIEVE DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, perform a PCM self-test.

Is DTC P0A5A present?
Yes GO to E2
No For DTC P0A5B, GO to E3.
For DTC P0A5C, GO to E5.
E2 CHECK THE GENERATOR CURRENT SENSOR
  • Ignition OFF.
  • Inspect the generator current sensor for the following:
    • physical damage
    • corrosion
    • disconnected electrical connector
    • generator B+ cable routed through the generator current sensor
    • debris between the generator current sensor and the generator B+ cable

Were any of these conditions found during the inspection?
Yes REPAIR as necessary or INSTALL a new generator current sensor.
REFER TO: Generator Current Sensor (414-01 Battery, Mounting and Cables, Removal and Installation).
No GO to E9
E3 CHECK THE GENERATOR CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect the generator current sensor C1645.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C1645-1 Ground

Is the voltage between 4.8 and 5.2 volts?
Yes GO to E4
No If the voltage is less than 4.8 V, REPAIR the circuit for an open or high resistance. If the voltage is greater than 5.2 V, REPAIR the circuit for a short to the supply voltage.
E4 CHECK THE GENERATOR CURRENT SENSOR FEEDBACK SIGNAL CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C1645-1 C1645-2

Is the voltage between 4.8 and 5.2 volts?
Yes GO to E5
No REPAIR the circuit for an open or high resistance.
E5 CHECK THE GENERATOR CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect PCM C1381B (2.3 L EcoBoost), C1551B (3 L EcoBoost) or C175B (3.3 L Duratec).
  • The ignition is on.
  • Action:
    Click to display the connectors

    For 2.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1381B-83 Ground

    Click to display the connectors

    For 3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1551B-55 Ground

    Click to display the connectors

    For 3.3 L Duratec


    Positive lead Measurement/Action Negative lead
    C175B-55 Ground

Is there voltage present?
Yes REPAIR the circuit.
No GO to E6
E6 CHECK THE GENERATOR CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C1645-3 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to E7
No REPAIR the circuit.
E7 CHECK THE GENERATOR CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO THE SIGNAL RETURN OR REFERENCE VOLTAGE CIRCUIT
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C1645-3 C1645-1
    C1645-3 C1645-2

Is the resistance greater than 10000 ohms?
Yes GO to E8
No REPAIR the faulty circuit.
E8 CHECK THE GENERATOR CURRENT SENSOR FEEDBACK CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    For 2.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1381B-83 C1645-3

    Click to display the connectors

    For 3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C1551B-55 C1645-3

    Click to display the connectors

    For 3.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C175B-55 C1645-3

Is the resistance less than 3 ohms?
Yes GO to E9
No REPAIR the circuit.
E9 CHECK THE GENERATOR CURRENT SENSOR CONNECTION
  • Ignition OFF.
  • Disconnect the generator current sensor C1645.
  • Inspect the generator current sensor connector for the following:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect and fully seat all connectors.
  • The ignition is on.
  • Using a diagnostic scan tool, clear all diagnostic trouble codes (DTCs) from all modules.
  • Using the diagnostic scan tool, perform a PCM self-test.

Did the DTC return?
Yes REPAIR as necessary or INSTALL a new generator current sensor.
REFER TO: Generator Current Sensor (414-01 Battery, Mounting and Cables, Removal and Installation).
CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. If the DTC returns, GO to E10.
No The system is currently operating correctly. The concern may have been caused by an intermittent loose or corroded connector. REPAIR the root cause of any connector or terminal concerns.
E10 CHECK THE PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect all connectors. Make sure they are installed and locked correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern,
Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST F: BATTERY MONITOR SENSOR FAULTS

For circuit and connector information, refer to Wiring Diagrams Cell 12.

Normal Operation and Fault Symptoms

The BCM monitors the battery state of charge using the battery monitoring sensor connected to the negative battery cable. Battery voltage is hard-wired to the battery monitoring sensor and data is sent from the battery monitoring sensor to the BCM through the LIN circuit.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
BCM B11DB: 02 Battery Monitoring Module "A": General Signal Failure This DTC sets if the BCM receives corrupted data from the Battery Monitor Sensor over LIN.
BCM B11DB: 08 Battery Monitor Module "A": Bus Signal/Message Failures This DTC sets if the BCM receives corrupted data from the Battery Monitor Sensor over LIN.
BCM B11DB: 09 Battery Monitor Module "A": Component Failure This DTC sets if the BCM detects a malfunction of the Battery Monitor Sensor LIN.
BCM B11DB: 11 Battery Monitoring Module "A": Short to Ground This DTC sets if the BCM detects low voltage on the Battery Monitor Sensor LIN.
BCM B11DB: 9A Battery Monitoring Module "A": Component or System Operating Conditions This DTC sets if the BCM receives corrupted data from the Battery Monitor Sensor over LIN.
BCM B1489: 11 Battery Monitor System (BMS) Sensor Power: Short to Ground This DTC sets when the BCM does not receive data from the battery monitoring sensor over the LIN.
BCM B1438: 03 Battery Current Sensor: Pulse Width Modulation/Frequency Modulation Failures This DTC is set in the BCM when the BCM does not receive current data from the battery current sensor.

Possible Sources

  • Battery Monitor Sensor
  • BCM
  • Wiring, Terminals or Connectors

Visual Inspection and Pre-checks

  • Inspect the battery monitor sensor.
  • Inspect the battery monitor sensor connector.
NOTE: Make sure the battery voltage is above 12.2 V before and during this precise test.
NOTE: Do not connect a battery charger during vehicle testing.
F1 CHECK THE ELECTRICAL CONNECTOR CONDITION
  • Disconnect the battery monitor sensor C1689.
  • Check the electrical connections of the battery monitor sensor for security, damage and corrosion.
  • Check the battery cable connections.
  • Connect the battery monitor sensor C1689.

Are all connectors clean and properly connected?
Yes GO to F2
No CLEAN corrosion from the battery cable connections.
REPAIR any damaged, bent or pushed-out pins.
F2 RETRIEVE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using a diagnostic scan tool, clear all diagnostic trouble codes (DTCs) from all modules.
  • Using a scan tool, perform the BCM self-test.

Did the DTC return?
Yes GO to F3
No For any PCM or BCM DTCs, refer to the wiring diagram in this section. The concern may have been caused by a loose or corroded connector. REPAIR the root cause of any connector or pin concern.
F3 CHECK THE BATTERY MONITORING SENSOR SUPPLY VOLTAGE
  • Ignition OFF.
  • Disconnect the battery monitor sensor C1689.
  • Measure and record:
    Positive lead Measurement/Action Negative lead
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C1689-2 Ground

Is the voltage within 0.5 V of the recorded battery voltage?
Yes GO to F4
No REPAIR the circuit. REFER to the Wiring Diagrams manual to identify possible causes of a short circuit.
F4 CHECK THE BATTERY MONITORING SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE
  • The ignition is on.
  • Disconnect the C2280F connector.
  • Action:
    Positive lead Measurement/Action Negative lead
    C1689-1 Ground

Is there voltage present?
Yes REPAIR the circuit.
No GO to F5
F5 CHECK THE BATTERY MONITORING SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C1689-1 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to F6
No REPAIR the circuit.
F6 CHECK THE BATTERY MONITORING SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C1689-1 C2280F-4

Is the resistance less than 3 ohms?
Yes INSTALL a new battery monitoring sensor.
REFER TO: Battery Monitoring Sensor (414-01 Battery, Mounting and Cables, Removal and Installation).
CLEAR all diagnostic trouble codes and REPEAT the self-test. If BCM DTC U1007:00 returns, GO to F7.
No REPAIR the circuit.
F7 CHECK 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
    • backed-out pins - install new pins as necessary
  • Reconnect the BCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST G: DTC U012D, U042E

For circuit and connector information, refer to Wiring Diagrams Cell 12.

Normal Operation and Fault Symptoms

The charging system supplies voltage to the battery and the vehicle electrical system through the battery B+ cable. The PCM monitors the generator output through the LIN circuit. The PCM uses this LIN circuit to send the desired voltage setpoint to the generator internal voltage regulator. The generator also uses this circuit to communicate generator load and fault conditions to the PCM.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U012D:00 Lost Communication With Alternator Control Module "A": no subtype information Set when the PCM does not detect communication over the LIN circuit. This may be the result of an open or short in the LIN circuit. This DTC also sets if the generator B+ circuit is open.
PCM U042E:00 Invalid data received from generator control module "A": no sub-type information Set when the PCM receives invalid data from the generator.

Possible Sources

  • Battery Monitor Sensor
  • Generator
  • PCM
  • Wiring, Terminals or Connectors

Visual Inspection and Pre-checks

  • Inspect the high-current BJB for loose, damaged or corroded connections.
  • Inspect the high-current fuse BJB 201 (275 A).
  • Inspect the FEAD belt.
  • Inspect the battery monitor sensor.
NOTE: Make sure the battery voltage is above 12.2 V before and during this precise test.
NOTE: Do not connect a battery charger during vehicle testing.
G1 COMPARE THE GENERATOR B+ CIRCUIT VOLTAGE TO THE BATTERY VOLTAGE
  • Measure and record:
    Positive lead Measurement/Action Negative lead
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C102A-1 Ground

Is the voltage within 0.5 V of the recorded battery voltage?
Yes GO to G2
No TIGHTEN or INSTALL a new generator B+ nut as necessary.
REFER TO: Generator — 2.3 L EcoBoost (201 kW/273 L PS) (414-02 Generator and Regulator, Removal and Installation).
REFER TO: Generator - 3 L EcoBoost (414-02 Generator and Regulator, Removal and Installation).
REFER TO: Generator - 3.3 L Duratec-V6 (414-02 Generator and Regulator, Removal and Installation). CHECK that the high-current BJB fuse 201 (275 A) is good. If good, REPAIR the circuit. If not good, REFER to the Wiring Diagrams Manual to determine the possible causes of the short circuit.
G2 CHECK THE GENERATOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect the generator C102B.
  • Disconnect PCM C1381B (2.3 L EcoBoost), C1551B (3 L EcoBoost) or C175B (3.3 L Duratec).
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C102B-1 Ground

Is there voltage present?
Yes REPAIR the circuit.
No GO to G3
G3 CHECK THE GENERATOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C102B-1 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to G4
No REPAIR the circuit.
G4 CHECK THE GENERATOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    For 2.3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C102B-1 C1381B-47

    Click to display the connectors

    For 3 L EcoBoost


    Positive lead Measurement/Action Negative lead
    C102B-1 C1551B-11

    Click to display the connectors

    For 3.3 L Duratec


    Positive lead Measurement/Action Negative lead
    C102B-1 C175B-11

Is the resistance less than 3 ohms?
Yes INSTALL a new generator.
REFER TO: Generator — 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Generator and Regulator, Removal and Installation).
REFER TO: Generator - 3 L EcoBoost (414-02 Generator and Regulator, Removal and Installation).
REFER TO: Generator - 3.3 L Duratec-V6 (414-02 Generator and Regulator, Removal and Installation). REPEAT the PCM self-test. If DTC U012D recurs, GO to G5.
No REPAIR the faulty circuit.
G5 CHECK PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all PCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the PCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If the TSBs do not resolve the concern,
Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST H: GENERATOR DECOUPLER COMPONENT TEST

For circuit and connector information, refer to Wiring Diagrams Cell 12.

Normal Operation and Fault Symptoms

The generator decoupler allows the generator rotor to continue rotating when the engine or FEAD system decelerates. The clutch must slide freely and smoothly in the clockwise direction. It must not freewheel in the counterclockwise direction. A loose FEAD belt or a weak or seized tensioner can cause the pulley to overheat. REFER TO: Charging System — System Operation and Component Description (414-00 Charging System — General Information, Description and Operation).

Possible Sources

  • FEAD
  • Generator Decoupler
H1 CHECK THE GENERATOR DECOUPLER
  • REMOVE the generator.
    REFER TO: Generator — 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Generator and Regulator, Removal and Installation).
    REFER TO: Generator - 3 L EcoBoost (414-02 Generator and Regulator, Removal and Installation).
    REFER TO: Generator - 3.3 L Duratec-V6 (414-02 Generator and Regulator, Removal and Installation).
  • Inspect the generator clutch for heat damage.

Are there signs of heat damage?
Yes INSTALL a new generator decoupler.
REFER TO: Generator Pulley (414-02 Generator and Regulator, Removal and Installation).
CHECK the FEAD system.
REFER TO: Accessory Drive (Accessory Drive 303-05A — 2.3 L EcoBoost (201 kW/273 L hp), Diagnosis and Testing).
No GO to H2
H2 CHECK THE GENERATOR DECOUPLER FOR SMOOTH OPERATION
  • Using a small screwdriver or similar tool, insert the tool through the rubber button in the center of the pulley cover and pry off the cap. Discard the cap. A new cover must be installed.
  • Using a 17 mm hex socket (such as Snap-on® SAM17E2 or equivalent) and a ratchet, fit the 17 mm hex socket onto the end of the clutch shaft.
  • Holding the clutch pulley firmly by hand, rotate the clutch shaft clockwise. The clutch shaft must rotate smoothly and freely.

Does the clutch shaft rotation feel rough or seized?
Yes INSTALL a new generator clutch.
Refer to: Generator Pulley (414-02 Generator and Regulator, Removal and Installation).
No GO to H3
H3 CHECK REVERSE ROTATION RESISTANCE
  • Holding the clutch pulley firmly by hand, rotate the clutch shaft counterclockwise.

Is there any resistance (spring feel)?
Yes GO to H4
No INSTALL a new generator clutch.
Refer to: Generator Pulley (414-02 Generator and Regulator, Removal and Installation).
H4 CHECK FOR REVERSE ROTATION
  • Holding the clutch pulley firmly by hand, rotate the clutch shaft counterclockwise.

Does the clutch shaft rotate freely?
Yes INSTALL a new generator clutch.
Refer to: Generator Pulley (414-02 Generator and Regulator, Removal and Installation).
No INSTALL a new alternator.
Refer to: Alternator - 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3 L EcoBoost (414-02 Alternator and Regulator, Removal and Installation).
Refer to: Alternator - 3.3 L Duratec-V6 (414-02 Alternator and Regulator, Removal and Installation).
PINPOINT TEST I: B11DB:49

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
BCM B11DB: 49 Battery Monitoring Module "A": Internal Electronic Failure Set in the BCM when an internal electronic fault is detected.

Possible Sources

  • BCM
I1 RETRIEVE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using a scan tool, perform the BCM self-test.

Is DTC B11DB:49 recorded?
Yes INSTALL a new battery monitoring sensor.
REFER TO: Battery Monitoring Sensor (414-01 Battery, Mounting and Cables, Removal and Installation).
No The system is currently operating correctly.
PINPOINT TEST J: B11DB:55

Normal Operation and Fault Symptoms

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

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
BCM B11DB: 55 Battery Monitoring Module "A": Not Configured Sets due to incomplete or incorrect PMI procedures.

Possible Sources

  • Incomplete or incorrect PMI procedures.
J1 RETRIEVE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a scan tool, perform the BCM self-test.

Is DTC B11DB:55 recorded?
Yes PROGRAM the initial configuration data from the PTS, following the scan tool instructions in the Module Programming > Initial section.
No GO to J2
J2 RELEARN THE BATTERY MANAGEMENT SYSTEM (BMS) STATUS
  • Using the service scan tool, run the BMS reset function.
  • Using a scan tool, perform the BCM self-test.

IS DTC B11DB:55 STILL STORED?
Yes Locate the part number on the installed BMS and verify that it is the correct BMS for this vehicle using the Ford parts catalog. Replace the BMS with the correct component.
REFER TO: Battery Current Sensor (414-01 Battery, Mounting and Cables, Removal and Installation).
No Make sure the repair is complete and the customer concern is resolved.
PINPOINT TEST K: P0A3B

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P0A3B:00 Alternator "A" Overheating: no subtype information Set in the PCM when generator overtemperature is detected.

Possible Sources

  • PCM
K1 RETRIEVE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using a diagnostic scan tool, run the PCM self-test and CHECK all cooling fan diagnostic trouble codes (DTCs).

Is DTC P0A3B recorded?
Yes If cooling fan diagnostic trouble codes (DTCs) are not present, INSTALL a new generator.
REFER TO: Generator — 2.3 L EcoBoost (201 kW/273 L hp) (414-02 Generator and Regulator, Removal and Installation).
REFER TO: Generator - 3 L EcoBoost (414-02 Generator and Regulator, Removal and Installation).
REFER TO: Generator - 3.3 L Duratec-V6 (414-02 Generator and Regulator, Removal and Installation).
No The system is currently operating correctly.

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