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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 328 (Charging System) >> Diagnosis And Testing >> Pinpoint Test >> Special Tool(s) >> Pinpoint Test A: DTCs B1317, B1676, P0563 and/or P1397 >> PINPOINT TEST A: DTCs B1317, B1676, P0563 AND/OR P1397

PINPOINT TEST A: DTCs B1317, B1676, P0563 AND/OR P1397

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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 
    • Carry out the Battery - Condition Test to determine if the battery can hold a charge and is OK for use. Refer to BATTERY, MOUNTING AND CABLES .
    • Does the battery pass the condition test? 
    • Yes  : GO to A2.
    • No  : INSTALL a new battery. REFER to BATTERY, MOUNTING AND CABLES . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  2. A2 RETRIEVE PCM DTCs 
    • Retrieve CMDTCs from all modules.
    • Do any charging system DTCs other than B1317, B1676, P0563 or P1397 exist? 
    • Yes  : REFER to the DTC CHART  for the correct pinpoint test and DIAGNOSE those DTCs first.
    • No  : GO to A3.
  3. A3 MONITOR PCM PID GENERATOR VOLTAGE DESIRED (GENVDSD) 
    • Start and idle 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 Monitor (GENMON).
      • Generator Command (GENCMD).
      • Generator Voltage Desired (GENVDSD).
      • Module Supply Voltage (VPWR).
    • Does the GENVDSD PID indicate 15.1 volts or less? 
    • Yes  : GO to A4.
    • No  : GO to  A11.
  4. A4 MONITOR PCM PID GENERATOR VOLTAGE DESIRED (GENVDSD) 
    • With the engine still running at idle, measure battery voltage and record.
      Fig 1: Measuring Battery Voltage
      G06544266Courtesy of FORD MOTOR CO.
    • Monitor the GENVDSD PID.
    • Is battery voltage within ±0.6 volt of the PID GENVDSD? 
    • Yes  : 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.
    • No  : GO to A5.
  5. A5 MEASURE THE "A" SENSE VOLTAGE 
    • Ignition OFF.
    • Disconnect: Generator C102A (gas) or C1104A (diesel).
    • With ignition ON, measure battery voltage and record.
      Fig 2: Measuring Battery Voltage
      G06544266Courtesy of FORD MOTOR CO.
    • Measure the voltage between generator C102A-3, circuit SDC14 (RD) (gas) or C1104A-3, circuit SDC14 (RD) (diesel), harness side and ground.
      Fig 3: Measuring Voltage Between Generator C102A-3, Circuit SDC14 (RD) Or C1104A-3, Circuit SDC14 (RD) And Ground
      G06098956Courtesy of FORD MOTOR CO.
    • Is the voltage equal to battery voltage? 
    • Yes  : GO to A6.
    • No  : VERIFY the fusible link is OK. If OK, REPAIR circuit SDC14 (RD). If not OK, REFER to the SYSTEM WIRING DIAGRAMS to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. A6 "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.
    • Using a 12-volt test lamp connected to ground, check for voltage at generator C102A-3, circuit SDC14 (RD) (gas) or C1104A-3, circuit SDC14 (RD) (diesel), harness side.
      Fig 4: Checking Voltage At Generator C102A-3, Circuit SDC14 (RD) Or C1104A-3, Circuit SDC14 (RD)
      G06098957Courtesy of FORD MOTOR CO.
    • Does the test lamp illuminate? 
    • Yes  : GO to A7.
    • No  : INSPECT generator C102A-3, circuit SDC14 (RD) (gas) or C1104A-3, circuit SDC14 (RD) (diesel) for damage. REPAIR corroded or loose connection on circuit SDC14 (RD). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  7. A7 CHECK THE GENERATOR OUTPUT 
    • Connect: Generator C102A (gas) or C1104A (diesel).
    • Start the engine.
    • Increase engine RPM until generator starts to generate output.
    • With the engine running, measure battery voltage and record.
      Fig 5: Measuring Battery Voltage
      G06544266Courtesy of FORD MOTOR CO.
    • Is the voltage above 14.5 volts? 
  8. A8 MONITOR PCM PIDs GENERATOR COMMAND (GENCMD), GENERATOR MONITOR (GENMON) AND GENERATOR VOLTAGE DESIRED (GENVDSD) 
    • Ignition OFF.
    • Disconnect: Generator C102A (gas) or C1104A (diesel).
    • Connect a fused jumper wire between:
      • For gasoline engines  , generator C102A-1, circuit CDC15 (VT), harness side and generator C102A-2, circuit CDC10 (BU/OG), circuit CDC10 (BU/OG), harness side.
      • For diesel engines  , generator C1104A-1, circuit CDC15 (VT), harness side and generator C1104A-2, circuit CDC09 (YE), harness side.
        Fig 6: Connecting Fused Jumper Wire Between Generator C1104A-1, Circuit CDC15 (VT) And Generator C1104A-2, Circuit CDC09 (YE)
        G06065167Courtesy of FORD MOTOR CO.
    • Start the engine.
    • Monitor the GENVDSD, GENMON and GENCMD PIDs.
    • Using the active command, set GENVDSD PID to 14 volts.
    • Does the GENCMD PID read within 2% of GENMON PID? 
    • Yes  : GO to A9.
    • No  : GO to  A11.
  9. A9 COMPARE PCM SUPPLY VOLTAGE (VPWR) PID 
    • With the engine still running at idle, measure the battery voltage at the battery and monitor the PCM VPWR PID.
      Fig 7: Measuring Battery Voltage
      G06544266Courtesy of FORD MOTOR CO.
    • Does PCM VPWR PID accurately display battery voltage within ±0.5 volt? 
  10. A10 CHECK PCM SUPPLY VOLTAGE CIRCUITS 
    • Ignition OFF.
    • Disconnect: PCM C175B (gas) or C1232B (diesel).
    • Remove Battery Junction Box (BJB) fuse 33 (15A).
    • For gasoline engines  , measure resistance between BJB fuse 33 and:
      • PCM C175B-67, circuit CBB33 (WH/BN), harness side.
      • PCM C175B-68, circuit CBB33 (WH/BN), harness side.
        Fig 8: Measuring Resistance Between BJB Fuse 33 And PCM C175B-67, Circuit CBB33 (WH/BN) (For Gasoline Engines)
        G07974084Courtesy of FORD MOTOR CO.
    • For diesel engines  , measure resistance between BJB fuse 33 and:
      • PCM C1232B-67, circuit CBB33 (WH/BN), harness side.
      • PCM C1232B-68, circuit CBB33 (WH/BN), harness side.
      • PCM C1232B-69, circuit CBB33 (WH/BN), harness side.
        Fig 9: Measuring Resistance Between BJB Fuse 33 And PCM C1232B-67, Circuit CBB33 (WH/BN) (For Diesel Engines)
        G07974085Courtesy of FORD MOTOR CO.
    • Are the resistances less than 0.5 ohm? 
    • Yes  : GO to A11.
    • No  : REPAIR high resistance or loose connections in the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  11. A11 CHECK FOR CORRECT PCM OPERATION 
    • Ignition OFF.
    • Check the PCM harness and component side connectors for:
      • corrosion
      • pushed-out pins and terminals
      • damaged pins and terminals
    • Reinstall BJB fuse 33 (15A).
    • Connect the PCM and generator, make sure the connectors seat correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
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