Charging System - General Information - Except Electric Ford Focus ST III

Overview

The generator is driven by the FEAD belt. When the engine is started, the generator begins to generate AC, which is internally converted to DC. The DC is controlled by the voltage regulator and supplied to the battery. The PCM controls the voltage regulation setpoint, communicating with the generator internal voltage regulator over a dedicated LIN communication circuit.

Scheme 11

Network Message Chart

MODULE NETWORK INPUT MESSAGES - BODY CONTROL MODULE (BCM)

MODULE NETWORK INPUT MESSAGES - INSTRUMENT PANEL CLUSTER (IPC)

MODULE NETWORK INPUT MESSAGES - POWERTRAIN CONTROL MODULE (PCM)

CHARGING SYSTEM

The smart regenerative charge system primary strategy is stored in the BCM. The BCM receives all of the important information relating to the battery condition from the battery monitoring sensor via the LIN. The BCM calculates and sends the set value needed for the generator charging voltage via the High Speed Controller Area Network (HS-CAN) to the PCM. The PCM then adjusts the value received (if necessary) and sends it to the generator via the LIN. The charging voltage is adjusted depending on various parameters, such as the current level of engine efficiency. The smallest possible set value for the generator voltage is 12.2 volts, while the maximum charging voltage can be anywhere between 14.5 and 14.9 volts. However, when the battery is in a refresh phase, the voltage may occasionally reach up to 15.2 volts. These refresh phases are required when the battery charge status is 80% over long periods of time, which increases the risk of sulfation in the battery cells.

The PCM simultaneously controls and monitors the output of the generator. When the current consumption is high or the battery is discharged, the PCM raises engine speed as needed to increase generator output. The generator charges the battery and at the same time supplies power for all of the electrical loads that are required. The battery is more effectively charged with a higher voltage when the battery is cold and a lower voltage when the battery is warm.

The PCM turns off the generator during cranking to reduce the generator load and improve cranking speed. Once the engine starts, the PCM slowly increases generator output to the desired voltage.

The PCM reports any charging system faults and sends a message through the High Speed Controller Area Network (HS-CAN) to the BCM. The BCM then sends a message over the Medium Speed Controller Area Network (MS-CAN) to the IPC, which controls the charging system warning indicator. The status of the PCM charging system warning indicator message can be confirmed by viewing the PCM Generator Fault Indicator Lamp (GENFIL) Parameter Identification (PID). Any charging system fault detected by the PCM results in 1 or more Diagnostic Trouble Codes (DTCs) being set and the GENFIL Parameter Identification (PID) having a status of ON. If equipped with a charging system warning indicator, the IPC turns the indicator on or off. If equipped with a message center, the IPC displays the corresponding message to notify the driver of the condition.

Under certain circumstances, the charging system may have a concern but still keeps the battery charged while the vehicle is running. The LIN is normally used to initiate charging, but the generator can charge with a fault in this circuit. If the engine operates at more than 2, 000 Revolutions Per Minute (RPM) momentarily, the generator self-excites or begins charging on its own. The charging system warning indicator is then illuminated and/or the corresponding message to notify the driver of the condition is displayed and the generator operates in a default mode (approximately 13.5 volts) until the engine is turned off. When the engine is restarted and the engine operates at more than 2, 000 Revolutions Per Minute (RPM) momentarily, the generator again self-excites and again the charging system warning indicator is illuminated and/or the corresponding message to notify the driver of the condition is displayed.

The Smart Regenerative Charge charging system is designed to set 1 of 7 Diagnostic Trouble Codes (DTCs) any time a charging system fault is present. All of the Diagnostic Trouble Codes (DTCs) can set as continuous faults, but not all Diagnostic Trouble Codes (DTCs) set as on-demand faults.

Battery Monitoring System

Note. When any vehicle module is being programmed, connect an external battery charger to make sure that the module programming is completed without interruption due to the load shedding feature becoming active. The external battery charger must maintain a system voltage above 13 volts. This may require a charger setting higher than the lowest charge setting. The external battery charger negative connection must be made to an engine or vehicle chassis ground and not the negative battery terminal. If the connection is to the negative battery terminal, load shedding may begin and module programming may be corrupted. After charging has begun, start the engine to clear any load shed states and then turn the engine off and proceed with programming.

This vehicle is equipped with a Battery Monitoring System which manages battery charging by the generator and monitors the battery state of charge. The Battery Monitoring System also utilizes a load shed strategy to help control discharge of the battery and prevent, when possible, an excessively low battery state of charge. The BCM monitors the battery state of charge using the battery monitoring sensor attached to the negative battery terminal and cable assembly.

To maintain correct operation of the load shed system, any electrical devices or equipment must be grounded to the chassis ground and not the negative battery terminal. A connection to the negative battery terminal causes an inaccurate measurement of the battery state of charge and incorrect load shed system operation due to the current being used bypassing the battery monitoring sensor.

The battery monitoring sensor has to be recalibrated at regular intervals. This occurs during a rest period or when the battery closed-circuit current is less than 100mA. The rest period must last for at least 3 hours. The timeframe in which a recalibration must take place is 7 days. If the system has been unable to carry out a recalibration within this time then it is impossible to confirm the exact state of charge of the battery. Any devices left attached to the power socket that draw in excess of 100mA (or less depending on other battery loads) will prevent a battery monitoring sensor recalibration.

When the ignition is in ACC or ON mode and the BCM determines the battery voltage or the battery state of charge has dropped below set levels, a low battery warning message is displayed in the message center as described below. Should the battery voltage or the battery state of charge continue to drop, the audio system is powered down to save the remaining battery charge. This load shed state clears once the vehicle has been started and battery state of charge is allowed to recover.

When the ignition is in the ON mode and if load shed occurs, the message center can display the corresponding message to notify the driver that battery protection actions are active. The audio system shuts down after the message center displays the warning.

If a fault occurs with the battery monitoring sensor or circuit(s), the only engine off load shed strategy that is active is a 45 minute timer. After 45 minutes have elapsed, the audio system turns off. To clear the load shed state, restart the engine.

If the vehicle battery is replaced, carry out the Battery Monitoring System Reset using the scan tool. If the Battery Monitoring System Reset is not carried out, measurement data collected for the old battery will not be deleted and future state of charge measurements will be inaccurate. For example, if an old battery has a state of charge of 60% and the new battery has a state of charge of 90%, the BCM will recognize battery state of charge being 30% lower than it actually is. With the battery state of charge being perceived lower than it actually is causes shedding of loads earlier than is necessary. This also impacts the smart regenerative charge system by causing the battery to be maintained at a higher state of charge than perceived by the BCM, reducing fuel economy benefits.

If the vehicle has been jump started, test the battery condition.

Refer to: BATTERY .

For charging the vehicle battery

Refer to: BATTERY .

Generator

The generator is equipped with an electronic internal voltage regulator and a serviceable generator clutch pulley.

Battery Monitoring Sensor

The battery monitoring sensor is attached to the negative battery terminal and cable assembly, which provides a ground to the sensor. The battery monitoring sensor measures voltage, current and temperature of the battery and uses these inputs to calculate the battery condition, transmitting this information through the LIN circuit to the BCM. The battery monitoring sensor has a 2-pin connector providing battery voltage and LIN connections. The battery monitoring sensor has to be recalibrated at regular intervals. This occurs during a rest period or when the battery closed-circuit current is less than 100mA. The rest period must last for at least 3 hours. The timeframe in which a recalibration must take place is 7 days. If the system has been unable to carry out a recalibration within this time then it is impossible to confirm the exact state of charge of the battery. Any devices left attached to the power socket that draw in excess of 100mA (or less depending on other battery loads) will prevent a battery monitoring sensor recalibration.

Powertrain Control Module (PCM)

The PCM monitors and controls the charging system.

Generator Clutch

The generator clutch is serviced separately from the generator. The primary function is to separate the generator rotor inertia from the FEAD belt, lowering belt tension at high Revolutions Per Minute (RPM) and reducing Noise, Vibration, or Harshness (NVH).

DTC Charts

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.

REFER to: DIAGNOSTIC METHODS for information about these practices.

PCM DTC CHART

BCM DTC CHART

Symptom Chart: Charging System

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.

REFER to: DIAGNOSTIC METHODS .

for information about these practices.

SYMPTOM CHART

System Voltage High

Refer to CHARGING SYSTEM for schematic and connector information.

Note. Diagnostic Trouble Code (DTC) P0563 can be set if the vehicle has been recently jump started or the battery has been recently charged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if vehicle accessories have been operating for an extended period of time without the engine running.

Normal Operation and Fault Conditions

With the engine running, the charging system supplies voltage to the battery and the vehicle electrical system through the high current BJB and battery B+ cable. The voltage that is supplied to the vehicle electrical system is used for the operation of the various vehicle systems and modules. Many modules monitor this voltage and if it rises above or below their calibrated setpoints, a DTC sets.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

Possible Sources

1. Wiring, terminals or connectors
2. Engine, generator or battery ground
3. Battery
4. Generator
5. PCM

Visual Inspection and Diagnostic Pre-checks

1. Inspect high current BJB for loose or corroded connections.

PINPOINT TEST A: SYSTEM VOLTAGE HIGH

Note. Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.

Note. Do not have a battery charger attached during vehicle testing.

Scheme 12

Scheme 13

1. A1 CHECK BATTERY CONDITION Check the battery condition and state of charge. REFER to: «BATTERY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) . Does the battery pass the condition test? Yes: GO to A2 No: CHARGE or INSTALL a new battery as necessary. REFER to: «BATTERY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) .
2. A2 MONITOR THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID Start the engine. Using a diagnostic scan tool, view the PCM Parameter Identification (PID) GENVDSD. Does the Parameter Identification (PID) indicate 15.9 volts or less? Yes: GO to A3 No: GO to A9
3. A3 COMPARE THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID WITH BATTERY VOLTAGE With the engine still running at idle, measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view the PCM Parameter Identification (PID) GENVDSD. Is the recorded battery voltage within ±0.5 volt of the Parameter Identification (PID)? Yes: The system is operating correctly at this time. The concern may have been caused by an intermittently loose or corroded connector. ADDRESS the root cause of any connector or pin issues. No: GO to A4
4. A4 CHECK THE VEHICLE GROUND VOLTAGE DROP With the engine still running at idle, headlamps on and heater blower on high, measure: Positive Lead Measurement / Action Negative Lead Generator case Is the voltage drop less than 0.5 volt? Yes: GO to A5 No: INSPECT and REPAIR the engine ground, generator ground or the battery ground for corrosion.
5. A5 MONITOR THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID WHILE COMMANDED Using a diagnostic scan tool, view the PCM Parameter Identification (PID) GENVDSD. Using a diagnostic scan tool, active command, set the PCM Parameter Identification (PID) GENVDSD to 14 volts. With the engine still running at idle, measure battery voltage and record. Is the recorded battery voltage within ±0.5 volt of the Parameter Identification (PID)? Yes: GO to A6 No: INSTALL a new generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .
6. A6 CHECK THE GENERATOR OUTPUT Increase engine Revolutions Per Minute (RPM) until generator starts to generate output. With the engine running, measure and record: Positive Lead Measurement / Action Negative Lead Is the voltage greater than 15.2 volts? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: GO to A7
7. A7 COMPARE THE SUPPLY VOLTAGE (VPWR) PID TO BATTERY VOLTAGE With the engine still running at idle, measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view the PCM Parameter Identification (PID) VPWR. Does the Parameter Identification (PID) accurately display battery voltage within ±0.5 volt of the recorded battery voltage? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: GO to A8
8. A8 CHECK PCM SUPPLY VOLTAGE CIRCUITS Ignition OFF. Disconnect PCM C175B. Ignition ON. Measure and record: Positive Lead Measurement / Action Negative Lead Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C175B-5 - C175B-6 - C175B-15 - Are the voltages within 0.5 volt of the recorded battery voltage? Yes: GO to A9 No: REPAIR the affected circuit(s) for high resistance. CLEAR all Diagnostic Trouble Codes (DTCs) in all modules.
9. A9 CHECK FOR CORRECT PCM 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 pushed-out pins - install new pins as necessary Reconnect the PCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM. REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-duratec-he__powertrain-control-module-pcm) . CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. 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.

System Voltage Low or Battery is Discharged

Refer to CHARGING SYSTEM for schematic and connector information.

With the engine running, the charging system supplies voltage to the battery and the vehicle electrical system through the high current BJB and battery B+ cable. The PCM monitors this B+ voltage through its own voltage supply circuit.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Wiring, terminals or connectors
2. Excessive ignition-OFF current drain
3. Battery
4. Generator
5. PCM
6. High current BJB

1. Inspect for abnormal ignition-off current drain(s).
2. Inspect the battery.
3. Inspect high current BJB for loose or corroded connections.
4. Inspect the generator clutch.

PINPOINT TEST B: SYSTEM VOLTAGE LOW OR BATTERY IS DISCHARGED

Note. Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.

Note. Do not have a battery charger attached during vehicle testing.

Scheme 14

1. B1 RETRIEVE PCM DTCS Ignition ON. Using a diagnostic scan tool, perform PCM self-test. Is DTC P065B present? Yes: If P065B is present, INSTALL a new generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: For all other PCM Diagnostic Trouble Codes (DTCs) REFER to the «PCM DTC CHART»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) . If no Diagnostic Trouble Codes (DTCs) are present, GO to B2
2. B2 CHECK BATTERY CONDITION Ignition OFF. Check the battery condition and state of charge. REFER to: «BATTERY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) . Does the battery pass the condition test? Yes: GO to B3 No: INSTALL a new battery. REFER to: «BATTERY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) .
3. B3 CHECK THE GENERATOR CONNECTIONS Disconnect and inspect all generator 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 Reconnect the generator connectors. Make sure they seat and latch correctly. Measure and record: Positive Lead Measurement / Action Negative Lead Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102B-1 - Is the voltage within 0.5 volt of the recorded battery voltage? Yes: GO to B4 No: TIGHTEN or INSTALL a new C102B (B+ nut) as needed. REFER to: «Charging System - 2.0L Duratec-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) . VERIFY high current BJB MEGA 2 fuse (150A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
4. B4 CHECK THE VOLTAGE DROP IN THE GENERATOR B+ CIRCUIT Start the engine. With the engine running at idle, headlamps on and blower on high, measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102B-1 Carry out a wiggle test of the generator wiring and connections while measuring voltage drop. Is the voltage drop less than 0.5 volt? Yes: GO to B5 No: INSPECT and REPAIR any corrosion in the generator B+ circuit or positive battery cable connections.
5. B5 CHECK THE VOLTAGE DROP IN THE VEHICLE GROUNDS With the engine still running at idle, headlamps on and heater blower on high, measure: Positive Lead Measurement / Action Negative Lead Generator case Is the voltage drop less than 0.5 volt? Yes: GO to B6 No: INSPECT and REPAIR the engine ground, generator ground or the battery ground for corrosion.
6. B6 MONITOR THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID WHILE COMMANDED Using a diagnostic scan tool, view the PCM GENVDSD Parameter Identification (PID). Using a diagnostic scan tool active command, set the PCM Parameter Identification (PID) GENVDSD to 14 volts. With the engine still running at idle, measure battery and record: Positive Lead Measurement / Action Negative Lead Is the recorded battery voltage within ±0.5 volt of the Parameter Identification (PID)? Yes: GO to B7 No: GO to B10
7. B7 COMPARE THE SUPPLY VOLTAGE (VPWR) PID TO BATTERY VOLTAGE With the engine still running at idle, headlamps on and blower on high, measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view the PCM Parameter Identification (PID) VPWR. Does the Parameter Identification (PID) accurately display battery voltage within ±0.5 volt of the recorded battery voltage? Yes: GO to B8 No: REPAIR high resistance or loose connections in the affected PCM power circuit(s).
8. B8 CHECK PCM GROUND FOR HIGH RESISTANCE NOTE: Measure battery voltage at the battery. With the engine still running at idle, turn off all accessory loads, measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view PCM Parameter Identification (PID) VPWR and record. With the engine still running at idle, turn headlamps on and blower on high. Measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view PCM Parameter Identification (PID) VPWR and record. Does the Parameter Identification (PID) read within ±0.5 volt of battery voltage with accessory loads on and off? Yes: GO to B9 No: REPAIR the affected PCM ground circuit(s).
9. B9 MONITOR THE SUPPLY VOLTAGE (VPWR) PID NOTE: Measure battery voltage at the battery. With the engine still running at idle, turn off all accessory loads. Measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view PCM Parameter Identification (PID) VPWR and record. Momentarily accelerate the engine to Wide Open Throttle (WOT) and release. Repeat this step 4-5 times while continuing to monitor the Parameter Identification (PID). Does the Parameter Identification (PID) stay within 0.5 volt of the recorded battery voltage when the engine Revolutions Per Minute (RPM) are increased? Yes: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. INSPECT and REPAIR any connector or pin issues found. If no connector or pin issues are found, CARRY OUT the battery drain test. REFER to: «BATTERY DRAIN CHECK»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric__battery-drain-check) . No: GO to B11
10. B10 CHECK GENERATOR CLUTCH OPERATION Ignition OFF. Carry out the «Component Test- Generator Clutch»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) Is the generator clutch OK? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: INSTALL a new generator clutch. REFER to: «GENERATOR PULLEY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .
11. B11 CHECK FOR CORRECT PCM 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 pushed-out pins - install new pins as necessary Reconnect the PCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM. REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-duratec-he__powertrain-control-module-pcm) . CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. 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.

The generator is belt-driven by the engine accessory drive system. There are several sources of generator noise which include bearing noise, electrical fault noise, generator or belt pulley misalignment. A generator with certain types of diode or stator failures can also produce an audible noise.

DTC FAULT TRIGGER CONDITIONS

1. FEAD belt
2. Loose bolts/brackets
3. Generator/pulleys

1. Inspect the FEAD belt.
2. Inspect for loose bolts/brackets.
3. Inspect the generator/pulley.

PINPOINT TEST C: THE GENERATOR IS NOISY

1. C1: CHECK FOR ACCESSORY DRIVE BELT NOISE AND LOOSE MOUNTING BRACKETS Ignition OFF. Check the FEAD belt and tensioner for damage and correct installation. REFER to: «ACCESSORY DRIVE»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-system-20l-duratec-he) . Is the accessory drive OK? Yes: GO to C2 No: REPAIR as necessary.
2. C2 CHECK THE GENERATOR MOUNTING Check the generator mounting for loose bolts or misalignment. Is the generator mounted correctly? Yes: GO to C3 No: REPAIR as necessary.
3. C3 CHECK THE GENERATOR FOR NOISE Start the engine. With the engine running, use a stethoscope or equivalent listening device to probe the generator and the accessory drive area for unusual mechanical noise. Is the generator the noise source? Yes: GO to C4 No: REFER to: «ENGINE»(/ford/focus-st/iii-2012-2015/remont/mechanical/#engine-system-general-information) . to diagnose the source of the engine noise.
4. C4 CHECK GENERATOR CLUTCH OPERATION Ignition OFF. Carry out the «Component Test- Generator Clutch»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) Is the generator clutch OK? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: INSTALL a new generator clutch. REFER to: «GENERATOR PULLEY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .

Radio Interference

Refer to CHARGING SYSTEM for schematic and connector information.

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

Note. If the Original Equipment Manufacturer (OEM) Audio Control Module (ACM) has been replaced with an aftermarket unit, the vehicle may not pass this test. Return the vehicle to Original Equipment Manufacturer (OEM) condition before following this pinpoint test.

Note. If the engine is operated at greater than 2, 000 Revolutions Per Minute (RPM) momentarily, the generator self-excites. Make sure when the generator is disconnected the engine rpm stays below 2, 000 Revolutions Per Minute (RPM). If it rises above 2, 000 Revolutions Per Minute (RPM), turn the ignition to the OFF position and start the test over again.

Note. Inspect for any aftermarket accessories that have been added to the vehicle. Check the wiring for these accessories and be sure they have not been attached to the generator circuits and are positioned away from the generator wiring.

1. Generator
2. Wiring, terminals or connectors
3. In-vehicle entertainment system

1. Inspect the generator.
2. Inspect the in-vehicle entertainment system.

PINPOINT TEST D: RADIO INTERFERENCE

1. D1: VERIFY THE GENERATOR IS THE SOURCE OF THE AUDIO SYSTEM INTERFERENCE Start the engine and allow the engine to idle. Tune the audio system to a station where interference is present. Ignition OFF. Disconnect Generator C102B. Start the engine and allow the engine to idle. Is the interference present with the generator disconnected? Yes: REFER to: «INFORMATION AND ENTERTAINMENT SYSTEM»(/ford/focus-st/iii-2012-2015/remont/entertainment-systems/#information-and-entertainment-system-general-information-amfmcd-except-electric) (Vehicles With: AM/FM/CD) . (Base), or REFER to: «INFORMATION AND ENTERTAINMENT SYSTEM»(/ford/focus-st/iii-2012-2015/remont/entertainment-systems/#information-and-entertainment-system-general-information-amfmcdsync-except-electric) (Vehicles With: AM/FM/CD/SYNC) . (Premium), or REFER to: «INFORMATION AND ENTERTAINMENT SYSTEM»(/ford/focus-st/iii-2012-2015/remont/entertainment-systems/#information-and-entertainment-system-general-information-syncsony-amfmcd-except-electric) (Vehicles With: SYNC/Sony AM/FM/CD) . (with Sony Sound) No: INSTALL a new generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .

B11DB:83

Refer to CHARGING SYSTEM for schematic and connector information.

The BCM monitors the battery state of charge using the battery monitoring sensor attached to the negative battery cable. Battery voltage is hardwired to the battery monitoring sensor and data is transferred from the battery monitoring sensor to the BCM via a LIN circuit.

Diagnostic Trouble Code (DTC) Fault Trigger Conditions

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Battery monitoring sensor
2. Wiring, terminals or connectors

1. Inspect battery monitoring sensor
2. Inspect battery monitoring sensor connector
3. Inspect BJB fuse 22 (15A)

PINPOINT TEST E: B11DB:83

1. E1: RETRIEVE BCM DTCS WITH BATTERY MONITORING SENSOR FUSE REMOVED Ignition OFF. Remove BJB fuse 22 (15A). Ignition ON. Using a diagnostic scan tool, perform BCM self-test. Check the BCM Diagnostic Trouble Codes (DTCs) from the self-test. Did DTC B11DB:83 return? Yes: GO to E2 No: INSTALL BJB fuse 22 (15A). CLEAR all BCM Diagnostic Trouble Codes (DTCs). PERFORM self-test again. If DTC B11DB:83 returns, INSTALL a new negative battery cable. REFER to: «BATTERY CABLES - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) . CLEAR all Diagnostic Trouble Codes (DTCs) in all modules.
2. E2 CHECK FOR CORRECT BCM OPERATION Ignition OFF. Install BCM fuse 22 (15A). Disconnect and inspect all BCM connectors. Repair: corrosion (install new connectors or terminals - clean module pins) damaged or bent pins - install new terminals/pins pushed-out pins - install new pins as necessary Reconnect the BCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM. REFER to: «BODY CONTROL MODULE (BCM)»(/ford/focus-st/iii-2012-2015/remont/cruise-control-systems/#multifunction-electronic-modules-except-electric) . 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.

U1007

Refer to CHARGING SYSTEM for schematic and connector information.

The battery monitoring sensor is attached to the negative battery cable. It is supplied battery voltage by the BJB. It communicates battery conditions to the BCM through a dedicated LIN circuit.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Battery monitoring sensor
2. Wiring, terminals or connectors

1. Inspect the battery monitoring sensor.
2. Inspect Battery monitoring sensor connector
3. Inspect the BJB fuse 22 (15A).

PINPOINT TEST F: U1007

Note. Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.

Note. Do not have a battery charger attached during vehicle testing.

1. F1 RETRIEVE BCM DTCS Ignition ON. Using a diagnostic scan tool, perform BCM self-test. Is DTC B1131:83 or B1131:87 present? Yes: DIAGNOSE wipers. REFER to: «WIPERS AND WASHERS»(/ford/focus-st/iii-2012-2015/remont/wiperwasher-systems/#wiper-system-washer-system-except-electric) . No: GO to F2
2. F2 CHECK THE BATTERY MONITORING SENSOR VOLTAGE Ignition OFF. Disconnect Battery Monitoring Sensor C1646. Measure and record: Positive Lead Measurement / Action Negative Lead Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-1 - Is the voltage within 0.5 volt of the recorded battery voltage? Yes: GO to F3 No: VERIFY BJB fuse 22 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
3. F3 CHECK THE BATTERY MONITORING SENSOR LIN CIRCUIT FOR A SHORT TO VOLTAGE Disconnect BCM C2280A. Disconnect Left Hand (LH) Windshield Wiper Motor C1655. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-2 - Is any voltage present? Yes: REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. No: GO to F4
4. F4 CHECK THE BATTERY MONITORING SENSOR LIN CIRCUIT FOR A SHORT TO GROUND Ignition OFF. Ignition OFF. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-2 ohms - Is the resistance greater than 10, 000 ohms? Yes: GO to F5 No: REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) in all modules.
5. F5 CHECK THE BATTERY MONITORING SENSOR LIN CIRCUIT FOR AN OPEN Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-2 ohms C2280A-42 Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-2 ohms C1655-1 Are the resistances less than 3 ohms? Yes: INSTALL a new negative battery cable. REFER to: «BATTERY CABLES - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) . CLEAR Diagnostic Trouble Codes (DTCs) in all modules. No: REPAIR the circuit. CLEAR Diagnostic Trouble Codes (DTCs) in all modules.

U012D, U042E

Refer to CHARGING SYSTEM for schematic and connector information.

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 a dedicated LIN communication circuit. The generator uses this LIN circuit to communicate the desired voltage setpoint from the PCM to the internal voltage regulator. The generator also uses this LIN circuit to communicate the generator load and error conditions to the PCM.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Active grille shutters (if equipped)
2. Battery monitoring sensor
3. Generator
4. Wiring, terminals or connectors

1. Inspect high current BJB fuse 2 (150A).
2. Inspect high current BJB for loose or corroded connections.

PINPOINT TEST G: U012D, U042E

Note. Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.

Note. Do not have a battery charger attached during vehicle testing.

Scheme 15

1. G1 CHECK VEHICLE FOR PRESENCE OF GRILLE SHUTTERS While looking through the grille opening, inspect the vehicle for the presence of grille shutters. REFER to: «ACTIVE GRILLE SHUTTER - OVERVIEW»(/ford/focus-st/iii-2012-2015/remont/exterior-body-panels/#body-panel-system-front-end-body-panels-except-electric) . Is the vehicle equipped with grille shutters? Yes: GO to G2 No: GO to G3
2. G2 RETRIEVE PCM DTCS WITH GRILLE SHUTTER ACTUATOR DISCONNECTED Ignition OFF. Disconnect Grill Shutter Actuator C1651. Ignition ON. Using a diagnostic scan tool, perform PCM self-test. Is DTC U012D or U042E present? Yes: GO to G3 No: INSTALL new grille shutter actuator. REFER to: «ACTIVE GRILLE SHUTTER»(/ford/focus-st/iii-2012-2015/remont/exterior-body-panels/#body-panel-system-front-end-body-panels-except-electric) .
3. G3 COMPARE THE GENERATOR B+ CIRCUIT TO BATTERY VOLTAGE Measure and record: Positive Lead Measurement / Action Negative Lead Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102B-1 - Is the voltage within 0.5 volt of the recorded battery voltage? Yes: GO to G4 No: TIGHTEN or INSTALL a new C102B (B+ nut) as needed. REFER to: «Charging System - 2.0L Duratec-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) . VERIFY high current BJB MEGA 2 fuse (150A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
4. G4 CHECK THE GENERATOR LIN CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect Generator C102A. Disconnect PCM C175E. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102A-1 - Is any voltage present? Yes: REPAIR the circuit. No: GO to G5
5. G5 CHECK THE GENERATOR LIN CIRCUIT FOR A SHORT TO GROUND Ignition OFF. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102A-1 ohms - Is the resistance greater than 10, 000 ohms? Yes: GO to G6 No: REPAIR the circuit.
6. G6 CHECK THE GENERATOR LIN CIRCUIT FOR AN OPEN Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102A-1 ohms C1651-2 Click to display connectors Positive Lead Measurement / Action Negative Lead C102A-1 ohms C175E-41 Is the resistance less than 3 ohms? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the PCM self-test. If DTC U012D is retrieved again, GO to G7 No: REPAIR the affected circuit.
7. G7 CHECK FOR CORRECT PCM 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 pushed-out pins - install new pins as necessary Reconnect the PCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM. REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-duratec-he__powertrain-control-module-pcm) . CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. No: The system is operating correctly at this time. The concern may have been caused by loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Scheme 16

Scheme 17

1. Remove the generator. REFER to: «GENERATOR - 2.0L DURATEC-HE»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .
2. Using a small screwdriver or similar tool, insert the tool through the rubber button on the center of the pulley cap and pry off the cap. Discard the cap. A new cap must be installed if the clutch is OK.
3. Using a 17 mm hex tool bit (such as a Snap-on® SAM17E2 or equivalent) and socket wrench, insert the 17 mm hex tool bit into the end of the clutch shaft.
4. While holding the clutch pulley firmly by hand, turn the clutch shaft clockwise. The shaft should rotate smooth and freely. If the shaft rotation is rough or seized, install a new generator clutch. REFER to: «GENERATOR PULLEY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .
5. While holding the clutch pulley firmly by hand, turn the clutch shaft counterclockwise. There should be some resistance (a spring feel). If the shaft rotates freely, install a new generator clutch. REFER to: «GENERATOR PULLEY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . .

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.

REFER to: DIAGNOSTIC METHODS for information about these practices.

PCM DTC CHART

BCM DTC CHART

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.

REFER to: DIAGNOSTIC METHODS for information about these practices.

SYMPTOM CHART

Refer to CHARGING SYSTEM for schematic and connector information.

Note. Diagnostic Trouble Code (DTC) P0563 can be set if the vehicle has been recently jump started or the battery has been recently charged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if vehicle accessories have been operating for an extended period of time without the engine running.

With the engine running, the charging system supplies voltage to the battery and the vehicle electrical system through the high current BJB and battery B+ cable. The voltage that is supplied to the vehicle electrical system is used for the operation of the various vehicle systems and modules. Many modules monitor this voltage and if it rises above or below their calibrated setpoints, a DTC sets.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Wiring, terminals or connectors
2. Engine, generator or battery ground
3. Battery
4. Generator
5. PCM

1. Inspect high current BJB for loose or corroded connections.

Note. Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.

Note. Do not have a battery charger attached during vehicle testing.

1. A1 CHECK BATTERY CONDITION Check the battery condition and state of charge. REFER to: «BATTERY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) . Does the battery pass the condition test? Yes: GO to A2 No: CHARGE or INSTALL a new battery as necessary. REFER to: «BATTERY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) .
2. A2 MONITOR THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID Start the engine. Using a diagnostic scan tool, view the PCM Parameter Identification (PID) GENVDSD. Does the Parameter Identification (PID) indicate 15.9 volts or less? Yes: GO to A3 No: GO to A9
3. A3 COMPARE THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID WITH BATTERY VOLTAGE With the engine still running at idle, measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view the PCM Parameter Identification (PID) GENVDSD. Is the recorded battery voltage within ±0.5 volt of the Parameter Identification (PID)? Yes: The system is operating correctly at this time. The concern may have been caused by an intermittently loose or corroded connector. ADDRESS the root cause of any connector or pin issues. No: GO to A4
4. A4 CHECK THE VEHICLE GROUND VOLTAGE DROP With the engine still running at idle, headlamps on and heater blower on high, measure: Positive Lead Measurement / Action Negative Lead Generator case Is the voltage drop less than 0.5 volt? Yes: GO to A5 No: INSPECT and REPAIR the engine ground, generator ground or the battery ground for corrosion.
5. A5 MONITOR THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID WHILE COMMANDED Using a diagnostic scan tool, view the PCM Parameter Identification (PID) GENVDSD. Using a diagnostic scan tool, active command, set the PCM Parameter Identification (PID) GENVDSD to 14 volts. With the engine still running at idle, measure battery voltage and record. Is the recorded battery voltage within ±0.5 volt of the Parameter Identification (PID)? Yes: GO to A6 No: INSTALL a new generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .
6. A6 CHECK THE GENERATOR OUTPUT Increase engine Revolutions Per Minute (RPM) until generator starts to generate output. With the engine running, measure and record: Positive Lead Measurement / Action Negative Lead Is the voltage greater than 15.2 volts? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: GO to A7
7. A7 COMPARE THE SUPPLY VOLTAGE (VPWR) PID TO BATTERY VOLTAGE With the engine still running at idle, measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view the PCM Parameter Identification (PID) VPWR. Does the Parameter Identification (PID) accurately display battery voltage within ±0.5 volt of the recorded battery voltage? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: GO to A8
8. A8 CHECK PCM SUPPLY VOLTAGE CIRCUITS Ignition OFF. Disconnect PCM C175B. Ignition ON. Measure and record: Positive Lead Measurement / Action Negative Lead Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C175B-5 - C175B-6 - C175B-15 - Are the voltages within 0.5 volt of the recorded battery voltage? Yes: GO to A9 No: REPAIR the affected circuit(s) for high resistance. CLEAR all Diagnostic Trouble Codes (DTCs) in all modules.
9. A9 CHECK FOR CORRECT PCM 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 pushed-out pins - install new pins as necessary Reconnect the PCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM. REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-ecoboost__powertrain-control-module-pcm) . CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. 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.

Refer to CHARGING SYSTEM for schematic and connector information.

With the engine running, the charging system supplies voltage to the battery and the vehicle electrical system through the high current BJB and battery B+ cable. The PCM monitors this B+ voltage through its own voltage supply circuit.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Wiring, terminals or connectors
2. Excessive ignition-OFF current drain
3. Battery
4. Generator
5. PCM
6. High current BJB

1. Inspect for abnormal ignition-off current drain(s).
2. Inspect the battery.
3. Inspect high current BJB for loose or corroded connections.
4. Inspect the generator clutch.

Note. Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.

Note. Do not have a battery charger attached during vehicle testing.

Scheme 18

Scheme 19

1. B1 RETRIEVE PCM DTCS Ignition ON. Using a diagnostic scan tool, perform PCM self-test. Is DTC P065B present? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: For all other PCM Diagnostic Trouble Codes (DTCs) REFER to the «PCM DTC CHART»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) . If no Diagnostic Trouble Codes (DTCs) are present, GO to B2
2. B2 CHECK BATTERY CONDITION Ignition OFF. Check the battery condition and state of charge. REFER to: «BATTERY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) . Does the battery pass the condition test? Yes: GO to B3 No: INSTALL a new battery. REFER to: «BATTERY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) .
3. B3 CHECK THE GENERATOR CONNECTIONS Disconnect and inspect all generator 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 Reconnect the generator connectors. Make sure they seat and latch correctly. Measure and record: Positive Lead Measurement / Action Negative Lead Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102B-1 - Is the voltage within 0.5 volt of the recorded battery voltage? Yes: GO to B4 No: TIGHTEN or INSTALL a new C102B (B+ nut) as needed. REFER to: «Charging System - 2.0L EcoBoost»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) . VERIFY high current BJB MEGA 2 fuse (150A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
4. B4 CHECK THE VOLTAGE DROP IN THE GENERATOR B+ CIRCUIT Start the engine. With the engine running at idle, headlamps on and blower on high, measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102B-1 Carry out a wiggle test of the generator wiring and connections while measuring voltage drop. Is the voltage drop less than 0.5 volt? Yes: GO to B5 No: INSPECT and REPAIR any corrosion in the generator B+ circuit or positive battery cable connections.
5. B5 CHECK THE VOLTAGE DROP IN THE VEHICLE GROUNDS With the engine still running at idle, headlamps on and heater blower on high, measure: Positive Lead Measurement / Action Negative Lead Generator case Is the voltage drop less than 0.5 volt? Yes: GO to B6 No: INSPECT and REPAIR the engine ground, generator ground or the battery ground for corrosion.
6. B6 MONITOR THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID WHILE COMMANDED Using a diagnostic scan tool, view the PCM GENVDSD Parameter Identification (PID). Using a diagnostic scan tool active command, set the PCM Parameter Identification (PID) GENVDSD to 14 volts. With the engine still running at idle, measure battery and record: Positive Lead Measurement / Action Negative Lead Is the recorded battery voltage within ±0.5 volt of the Parameter Identification (PID)? Yes: GO to B7 No: GO to B10
7. B7 COMPARE THE SUPPLY VOLTAGE (VPWR) PID TO BATTERY VOLTAGE With the engine still running at idle, headlamps on and blower on high, measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view the PCM Parameter Identification (PID) VPWR. Does the Parameter Identification (PID) accurately display battery voltage within ±0.5 volt of the recorded battery voltage? Yes: GO to B8 No: REPAIR high resistance or loose connections in the affected PCM power circuit(s).
8. B8 CHECK PCM GROUND FOR HIGH RESISTANCE NOTE: Measure battery voltage at the battery. With the engine still running at idle, turn off all accessory loads, measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view PCM Parameter Identification (PID) VPWR and record. With the engine still running at idle, turn headlamps on and blower on high. Measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view PCM Parameter Identification (PID) VPWR and record. Does the Parameter Identification (PID) read within ±0.5 volt of battery voltage with accessory loads on and off? Yes: GO to B9 No: REPAIR the affected PCM ground circuit(s).
9. B9 MONITOR THE SUPPLY VOLTAGE (VPWR) PID NOTE: Measure battery voltage at the battery. With the engine still running at idle, turn off all accessory loads. Measure and record: Positive Lead Measurement / Action Negative Lead Using a diagnostic scan tool, view PCM Parameter Identification (PID) VPWR and record. Momentarily accelerate the engine to Wide Open Throttle (WOT) and release. Repeat this step 4-5 times while continuing to monitor the Parameter Identification (PID). Does the Parameter Identification (PID) stay within 0.5 volt of the recorded battery voltage when the engine Revolutions Per Minute (RPM) are increased? Yes: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. INSPECT and REPAIR any connector or pin issues found. If no connector or pin issues are found, CARRY OUT the battery drain test. REFER to: «BATTERY DRAIN CHECK»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric__battery-drain-check) . No: GO to B11
10. B10 CHECK GENERATOR CLUTCH OPERATION Ignition OFF. Carry out the «Component Test- Generator Clutch»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) Is the generator clutch OK? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: INSTALL a new generator clutch. REFER to: «GENERATOR PULLEY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .
11. B11 CHECK FOR CORRECT PCM 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 pushed-out pins - install new pins as necessary Reconnect the PCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM. REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-ecoboost__powertrain-control-module-pcm) . CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. 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.

The generator is belt-driven by the engine accessory drive system. There are several sources of generator noise which include bearing noise, electrical fault noise, generator or belt pulley misalignment. A generator with certain types of diode or stator failures can also produce an audible noise.

DTC FAULT TRIGGER CONDITIONS

1. FEAD belt
2. Loose bolts/brackets
3. Generator/pulleys

1. Inspect the FEAD belt.
2. Inspect for loose bolts/brackets.
3. Inspect the generator/pulley.

1. C1: CHECK FOR ACCESSORY DRIVE BELT NOISE AND LOOSE MOUNTING BRACKETS Ignition OFF. Check the FEAD belt and tensioner for damage and correct installation. REFER to: «ACCESSORY DRIVE»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost) . Is the accessory drive OK? Yes: GO to C2 No: REPAIR as necessary.
2. C2 CHECK THE GENERATOR MOUNTING Check the generator mounting for loose bolts or misalignment. Is the generator mounted correctly? Yes: GO to C3 No: REPAIR as necessary.
3. C3 CHECK THE GENERATOR FOR NOISE Start the engine. With the engine running, use a stethoscope or equivalent listening device to probe the generator and the accessory drive area for unusual mechanical noise. Is the generator the noise source? Yes: GO to C4 No: REFER to: «ENGINE»(/ford/focus-st/iii-2012-2015/remont/mechanical/#engine-system-general-information) . to diagnose the source of the engine noise.
4. C4 CHECK GENERATOR CLUTCH OPERATION Ignition OFF. Carry out the «Component Test- Generator Clutch»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) Is the generator clutch OK? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . No: INSTALL a new generator clutch. REFER to: «GENERATOR PULLEY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .

Refer to CHARGING SYSTEM for schematic and connector information.

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

Note. If the Original Equipment Manufacturer (OEM) Audio Control Module (ACM) has been replaced with an aftermarket unit, the vehicle may not pass this test. Return the vehicle to Original Equipment Manufacturer (OEM) condition before following this pinpoint test.

Note. If the engine is operated at greater than 2, 000 Revolutions Per Minute (RPM) momentarily, the generator self-excites. Make sure when the generator is disconnected the engine rpm stays below 2, 000 Revolutions Per Minute (RPM). If it rises above 2, 000 Revolutions Per Minute (RPM), turn the ignition to the OFF position and start the test over again.

Note. Inspect for any aftermarket accessories that have been added to the vehicle. Check the wiring for these accessories and be sure they have not been attached to the generator circuits and are positioned away from the generator wiring.

1. Generator
2. Wiring, terminals or connectors
3. In-vehicle entertainment system

1. Inspect the generator.
2. Inspect the in-vehicle entertainment system.

1. D1: VERIFY THE GENERATOR IS THE SOURCE OF THE AUDIO SYSTEM INTERFERENCE Start the engine and allow the engine to idle. Tune the audio system to a station where interference is present. Ignition OFF. Disconnect Generator C102B. Start the engine and allow the engine to idle. Is the interference present with the generator disconnected? Yes: REFER to: «INFORMATION AND ENTERTAINMENT SYSTEM»(/ford/focus-st/iii-2012-2015/remont/entertainment-systems/#information-and-entertainment-system-general-information-amfmcd-except-electric) (Vehicles With: AM/FM/CD) . (Base), or REFER to: «INFORMATION AND ENTERTAINMENT SYSTEM»(/ford/focus-st/iii-2012-2015/remont/entertainment-systems/#information-and-entertainment-system-general-information-amfmcdsync-except-electric) (Vehicles With: AM/FM/CD/SYNC) . (Premium), or REFER to: «INFORMATION AND ENTERTAINMENT SYSTEM»(/ford/focus-st/iii-2012-2015/remont/entertainment-systems/#information-and-entertainment-system-general-information-syncsony-amfmcd-except-electric) (Vehicles With: SYNC/Sony AM/FM/CD) . (with Sony Sound) No: INSTALL a new generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .

Refer to CHARGING SYSTEM for schematic and connector information.

The BCM monitors the battery state of charge using the battery monitoring sensor attached to the negative battery cable. Battery voltage is hardwired to the battery monitoring sensor and data is transferred from the battery monitoring sensor to the BCM via a LIN circuit.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Battery monitoring sensor
2. Wiring, terminals or connectors

1. Inspect battery monitoring sensor
2. Inspect battery monitoring sensor connector
3. Inspect BJB fuse 22 (15A)

1. E1: RETRIEVE BCM DTCS WITH BATTERY MONITORING SENSOR FUSE REMOVED Ignition OFF. Remove BJB fuse 22 (15A). Ignition ON. Using a diagnostic scan tool, perform BCM self-test. Check the BCM Diagnostic Trouble Codes (DTCs) from the self-test. Did DTC B11DB:83 return? Yes: GO to E2 No: INSTALL BJB fuse 22 (15A). CLEAR all BCM Diagnostic Trouble Codes (DTCs). PERFORM self-test again. If DTC B11DB:83 returns, INSTALL a new negative battery cable. REFER to: «BATTERY CABLES - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) . CLEAR all Diagnostic Trouble Codes (DTCs) in all modules.
2. E2 CHECK FOR CORRECT BCM OPERATION Ignition OFF. Install BCM fuse 22 (15A). Disconnect and inspect all BCM connectors. Repair: corrosion (install new connectors or terminals - clean module pins) damaged or bent pins - install new terminals/pins pushed-out pins - install new pins as necessary Reconnect the BCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM. REFER to: «BODY CONTROL MODULE (BCM)»(/ford/focus-st/iii-2012-2015/remont/cruise-control-systems/#multifunction-electronic-modules-except-electric) . 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.

Refer to CHARGING SYSTEM for schematic and connector information.

The battery monitoring sensor is attached to the negative battery cable. It is supplied battery voltage by the BJB. It communicates battery conditions to the BCM through a dedicated LIN circuit.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Battery monitoring sensor
2. Wiring, terminals or connectors

1. Inspect the battery monitoring sensor.
2. Inspect Battery monitoring sensor connector
3. Inspect the BJB fuse 22 (15A).

Note. Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.

Note. Do not have a battery charger attached during vehicle testing.

1. F1 RETRIEVE BCM DTCS Ignition ON. Using a diagnostic scan tool, perform BCM self-test. Is DTC B1131:83 or B1131:87 present? Yes: DIAGNOSE wipers. REFER to: «WIPERS AND WASHERS»(/ford/focus-st/iii-2012-2015/remont/wiperwasher-systems/#wiper-system-washer-system-except-electric) . No: GO to F2
2. F2 CHECK THE BATTERY MONITORING SENSOR VOLTAGE Ignition OFF. Disconnect Battery Monitoring Sensor C1646. Measure and record: Positive Lead Measurement / Action Negative Lead Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-1 Is the voltage within 0.5 volt of the recorded battery voltage? Yes: GO to F3 No: VERIFY BJB fuse 22 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
3. F3 CHECK THE BATTERY MONITORING SENSOR LIN CIRCUIT FOR A SHORT TO VOLTAGE Disconnect BCM C2280A. Disconnect Left Hand (LH) Windshield Wiper Motor C1655. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-2 - Is any voltage present? Yes: REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. No: GO to F4
4. F4 CHECK THE BATTERY MONITORING SENSOR LIN CIRCUIT FOR A SHORT TO GROUND Ignition OFF. Ignition OFF. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-2 ohms - Is the resistance greater than 10, 000 ohms? Yes: GO to F5 No: REPAIR the circuit. CLEAR all Diagnostic Trouble Codes (DTCs) in all modules.
5. F5 CHECK THE BATTERY MONITORING SENSOR LIN CIRCUIT FOR AN OPEN Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-2 ohms C2280A-42 Click to display connectors Positive Lead Measurement / Action Negative Lead C1646-2 ohms C1655-1 Are the resistances less than 3 ohms? Yes: INSTALL a new negative battery cable. REFER to: «BATTERY CABLES - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#battery-mounting-and-cables-except-electric) . CLEAR Diagnostic Trouble Codes (DTCs) in all modules. No: REPAIR the circuit. CLEAR Diagnostic Trouble Codes (DTCs) in all modules.

Refer to CHARGING SYSTEM for schematic and connector information.

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 a dedicated LIN communication circuit. The generator uses this LIN circuit to communicate the desired voltage setpoint from the PCM to the internal voltage regulator. The generator also uses this LIN circuit to communicate the generator load and error conditions to the PCM.

DIAGNOSTIC TROUBLE CODE (DTC) FAULT TRIGGER CONDITIONS

1. Active grille shutters (if equipped)
2. Battery monitoring sensor
3. Generator
4. Wiring, terminals or connectors

1. Inspect high current BJB fuse 2 (150A).
2. Inspect high current BJB for loose or corroded connections.

Note. Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.

Note. Do not have a battery charger attached during vehicle testing.

1. G1 CHECK VEHICLE FOR PRESENCE OF GRILLE SHUTTERS While looking through the grille opening, inspect the vehicle for the presence of grille shutters. REFER to: «ACTIVE GRILLE SHUTTER - OVERVIEW»(/ford/focus-st/iii-2012-2015/remont/exterior-body-panels/#body-panel-system-front-end-body-panels-except-electric) . Is the vehicle equipped with grille shutters? Yes: GO to G2 No: GO to G3
2. G2 RETRIEVE PCM DTCS WITH GRILLE SHUTTER ACTUATOR DISCONNECTED Ignition OFF. Disconnect Grill Shutter Actuator C1651. Ignition ON. Using a diagnostic scan tool, perform PCM self-test. Is DTC U012D or U042E present? Yes: GO to G3 No: INSTALL new grille shutter actuator. REFER to: «ACTIVE GRILLE SHUTTER»(/ford/focus-st/iii-2012-2015/remont/exterior-body-panels/#body-panel-system-front-end-body-panels-except-electric) .
3. G3 COMPARE THE GENERATOR B+ CIRCUIT TO BATTERY VOLTAGE Measure and record: Positive Lead Measurement / Action Negative Lead Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102B-1 - Is the voltage within 0.5 volt of the recorded battery voltage? Yes: GO to G4 No: TIGHTEN or INSTALL a new C102B (B+ nut) as needed. REFER to: «Charging System - 2.0L EcoBoost»(/ford/focus-st/iii-2012-2015/remont/charging-system/#charging-system-general-information-except-electric) . VERIFY high current BJB MEGA 2 fuse (150A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
4. G4 CHECK THE GENERATOR LIN CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect Generator C102A. Disconnect PCM C175E. Ignition ON. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102A-1 - Is any voltage present? Yes: REPAIR the circuit. No: GO to G5
5. G5 CHECK THE GENERATOR LIN CIRCUIT FOR A SHORT TO GROUND Ignition OFF. Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102A-1 ohms - Is the resistance greater than 10, 000 ohms? Yes: GO to G6 No: REPAIR the circuit.
6. G6 CHECK THE GENERATOR LIN CIRCUIT FOR AN OPEN Measure: Click to display connectors Positive Lead Measurement / Action Negative Lead C102A-1 ohms C1651-2 Click to display connectors Positive Lead Measurement / Action Negative Lead C102A-1 ohms C175E-41 Is the resistance less than 3 ohms? Yes: INSTALL a new generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the PCM self-test. If DTC U012D is retrieved again, GO to G7 No: REPAIR the affected circuit.
7. G7 CHECK FOR CORRECT PCM 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 pushed-out pins - install new pins as necessary Reconnect the PCM 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM. REFER to: «POWERTRAIN CONTROL MODULE (PCM)»(/ford/focus-st/iii-2012-2015/remont/removal-installation/#electronic-engine-controls-20l-ecoboost__powertrain-control-module-pcm) . CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. No: The system is operating correctly at this time. The concern may have been caused by loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Component Test- Generator Clutch

1. Remove the generator. REFER to: «GENERATOR - 2.0L ECOBOOST»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .
2. Using a small screwdriver or similar tool, insert the tool through the rubber button on the center of the pulley cap and pry off the cap. Discard the cap. A new cap must be installed if the clutch is OK.
3. Using a 17 mm hex tool bit (such as a Snap-on® SAM17E2 or equivalent) and socket wrench, insert the 17 mm hex tool bit into the end of the clutch shaft.
4. While holding the clutch pulley firmly by hand, turn the clutch shaft clockwise. The shaft should rotate smooth and freely. If the shaft rotation is rough or seized, install a new generator clutch. REFER to: «GENERATOR PULLEY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) .
5. While holding the clutch pulley firmly by hand, turn the clutch shaft counterclockwise. There should be some resistance (a spring feel). If the shaft rotates freely, install a new generator clutch. REFER to: «GENERATOR PULLEY»(/ford/focus-st/iii-2012-2015/remont/charging-system/#generator-and-regulator-except-electric) . .

See also:
• BATTERY
• DIAGNOSTIC METHODS
• GENERATOR - 2.0L DURATEC-HE
• BODY CONTROL MODULE (BCM)
• INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES
• POWERTRAIN CONTROL MODULE (PCM)
• BATTERY DRAIN CHECK
• ACCESSORY DRIVE
• ENGINE
• INFORMATION AND ENTERTAINMENT SYSTEM
• INFORMATION AND ENTERTAINMENT SYSTEM
• INFORMATION AND ENTERTAINMENT SYSTEM
• WIPERS AND WASHERS
• ACTIVE GRILLE SHUTTER - OVERVIEW
• POWERTRAIN CONTROL MODULE (PCM)
• ACCESSORY DRIVE
• Pinpoint Test B
• Pinpoint Test A
• Pinpoint Test C
• Pinpoint Test G
• Pinpoint Test E
• Pinpoint Test F
• Pinpoint Test D
• DTC Charts
• PCM DTC CHART