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Pinpoint Test E: DTC P065B

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Make sure battery voltage is greater than 12.2 volts prior to carrying out this pinpoint test.
NOTE: Do not have a battery charger attached during vehicle testing.
  1. E1 CHECK THE BATTERY CONDITION 
  2. E2 CHECK THE GENERATOR CONNECTIONS 
    • Ignition OFF.
    • Inspect generator C102A connection. Connector should be installed correctly and tight.
    • Disconnect: Generator C102A.
    • Inspect generator C102A for bent and/or pushed-out pins.
    • Inspect generator C102B, B+ circuit SDC14 (RD) and radial arm connection(s). Connection should be tight.
    • Measure the battery voltage.
      Fig 1: Measuring The Battery Voltage
      G07787470Courtesy of FORD MOTOR CO.
    • Measure the voltage between generator C102B, B+ circuit SDC14 (RD) and ground.
      Fig 2: Measuring Voltage Between Generator C102B, B+ Circuit SDC14 (RD) And Ground
      G07787471Courtesy of FORD MOTOR CO.
    • Are the generator C102B and radial arm adapter connections tight and does the generator B+ measure battery voltage? 
    • Yes  : GO to E3  .
    • No  : TIGHTEN or INSTALL a new C102B (B+ nut) and/or radial arm adapter as needed. REFER to SPECIFICATIONS  in this service information. VERIFY the fusible link is OK. If the fusible link is OK, REPAIR circuit SDC14 (RD). If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  3. E3 A SENSE CIRCUIT LOAD TEST 
    NOTE: The following step uses a test light to simulate normal circuit loads. Use only the test light recommended in the Special Tools table at the beginning of this service information. To avoid connector terminal damage, use the Flex Probe Kit for the test light probe connection to the vehicle. Do not use the test light probe directly on any connector.
    NOTE: This step puts a load on the A sense circuit. If there are corroded or loose connections, loading the circuit may help show the fault. A 250-350 mA incandescent 12-volt test lamp is required for this step. This circuit will not be loaded properly using an LED-style test lamp.
    • Ignition ON.
    • Using a 12-volt test lamp connected to ground, check for voltage at C102A-3, circuit SBB17 (RD), harness side.
      Fig 3: Checking Voltage At C102A-3, Circuit SBB17 (RD), Harness Side Using 12-Volt Test Lamp
      G07787472Courtesy of FORD MOTOR CO.
    • Does the test lamp illuminate? 
    • Yes  : GO to E4  .
    • No  : VERIFY Battery Junction Box (BJB) fuse 17 (10A) is OK. If OK, REPAIR circuit SBB17 (RD). If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  4. E4 CHECK THE PCM GENERATOR MONITOR FREQUENCY (GENMON_HZ) PID 
    • Ignition OFF.
    • Connect: Generator C102A.
    • Start the engine.
      • NOTE: Many of the PCM PIDs selected will be monitored later in this pinpoint test.
    • Select and monitor the following PCM PIDs:
      • Generator Voltage Desired (GENVDSD)
      • Generator Monitor Frequency (GENMON_HZ)
    • Monitor the GENMON_HZ PID.
    • Does the PID read between 80-200 Hz? 
    • Yes  : GO to  E8.
    • No  : GO to E5  .
  5. E5 CHECK THE PCM GENERATOR MONITOR FREQUENCY (GENMON_HZ) PID WITH GENERATOR C102A DISCONNECTED 
    • Ignition OFF.
    • Disconnect: Generator C102A.
    • Start the engine.
    • Monitor the GENMON_HZ PID.
    • Does the PID read between 0-2 Hz? 
    • Yes  : GO to  E7.
    • No  : GO to E6  .
  6. E6 CHECK GENERATOR CIRCUITRY 
    • Ignition OFF.
      • NOTE: This pinpoint test step directs testing circuits using a backprobe method. Use the special back-probe tool specified in the tool list in this service information. Do not force test leads or other probes into connectors. Adequate care must be exercised to avoid connector terminal damage while making sure that good electrical contact is made with the circuit or terminal. Failure to follow these instructions may cause damage to wiring, terminals, or connectors and subsequent electrical faults.
    • With PCM C175B (2.5L or 3.0L) or C175E (3.5L) connected, connect a fused jumper wire between PCM C175B-14 (2.5L or 3.0L) or C175E-26 (3.5L), circuit CDC15 (VT) and ground by carefully back probing the connector.
    • Start the engine.
    • Monitor the GENMON_HZ PID.
    • Does the PID read 0 Hz? 
  7. E7 MONITOR THE PCM PID GENERATOR MONITOR FREQUENCY (GENMON_HZ) WHILE ACTIVATING THE GENERATOR VOLTAGE DESIRED (GENVDSD) PID 
    • Ignition OFF.
    • Connect a fused jumper wire between generator C102A-1, circuit CDC15 (VT), harness side and generator C102A-2, circuit CDC10 (BU/OG), harness side.
      Fig 4: Identifying Fused Jumper Wire Connection Between Generator C102A-1, CDC15 (VT), Harness Side And Generator C102A-2, Circuit CDC10 (BU/OG)
      G07787473Courtesy of FORD MOTOR CO.
    • Start the engine.
    • With the engine running at idle, set the active command GENVDSD PID to 14 volts.
    • Monitor the GENMON_HZ PID.
    • Does the GENMON_HZ PID read between 120-130 Hz? 
  8. E8 CHECK THE PCM GENERATOR COMMAND LINE FAULT (GENCMD_LF) PID 
    • With the engine running and all selectable loads OFF, monitor the PCM PID GENCMD_LF.
    • Does the PCM PID GENCMD_LF fluctuate from YES FAULT to NO FAULT? 
    • Yes  : INSTALL a new generator. REFER to GENERATOR - 2.5L , GENERATOR - 3.0L  or GENERATOR - 3.5L  in this service information. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No  : The fault is not present at this time. This may indicate an intermittent fault. CARRY OUT a wiggle test on the charging system circuits to try and RECREATE the concern. CHECK generator connections for corrosion, loose connections and/or bent terminals. REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
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