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Pinpoint Test E: DTC P065B

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 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 
    • Yes:  GO to  E2.
    • No:  INSTALL a new battery. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  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 Battery Voltage
      G06063926Courtesy of FORD MOTOR CO.
    • Measure the voltage between generator C102B, B+ circuit SDC14 (RD) and ground.
      Fig 2: Measuring Voltage Between Generator B+ C102B & Ground
      G06271245Courtesy 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 . VERIFY the fusible link is OK. If the fusible link is OK, REPAIR circuit SDC14 (RD). If not OK, REFER to the appropriate 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 article. 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 Resistance On Circuit SBB17
      G06098957Courtesy 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 appropriate 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.
    • Select and monitor the following PCM PIDs:
      • Generator Voltage Desired (GENVDSD)
      • Generator Monitor Frequency (GENMON_HZ)
      NOTE: Many of the PCM PIDs selected will be monitored later in this pinpoint test.
    • 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.
    • 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.
      NOTE: This pinpoint test step directs testing circuits using a backprobe method. Use the special back-probe tool specified in the tool list. 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.
    • Monitor the GENMON_HZ PID.
    • Does the PID read 0 Hz? 
    • Yes:  INSPECT the harness for wire to wire shorts or insulation chaffing, mis-pinned connectors and correct wire colors and REPAIR generator circuit CDC15 (VT) as needed. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No:  INSTALL a new PCM. REFER to INSTALLATION for 2.5L engines , INSTALLATION for 3.0L engines or INSTALLATION for 3.5L engines . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  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: Connecting Fused Jumper Wire Between Generator C102A-1 & C102A-2
      G06065167Courtesy 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 Installation  (2.5L), Removal and Installation  (3.0L) or Removal and Installation . 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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