Pinpoint Test D: DTC P0625 Or P0626

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 and during this pinpoint test.

NOTE: Do not have a battery charger attached during vehicle testing.

D1 CHECK THE BATTERY CONDITION
- Refer to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article and carry out Pinpoint Test A: Battery Condition Test to determine if the battery can hold a charge and is OK for use.
- Does the battery pass the condition test?
- Yes : GO to D2 .
- No : INSTALL a new battery. REFER to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
D2 CHECK THE GENERATOR B+ CONNECTION
- Ignition OFF.
- Inspect generator C102B, circuit SDC14 (RD), harness side. Connection should be tight.
- Inspect generator radial adapter connection on rear of generator. Connection should be tight.
- Measure the voltage between generator C102B, circuit SDC14 (RD) and ground.
  
  Fig 1: Measuring Voltage Between Generator C102B, Circuit SDC14 (RD) And Ground
  Courtesy 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 D3 .
- 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.
D3 CHECK THE VOLTAGE DROP IN THE B+ CIRCUIT
- Start the engine.
- With the engine running at idle, headlamps on and blower on high, measure the voltage drop between generator B+ C102B, circuit SDC14 (RD) and the positive battery terminal.
  
  Fig 2: Measuring Voltage Drop Between Generator B+ C102B, Circuit SDC14 (RD) And Positive Battery Terminal
  Courtesy of FORD MOTOR CO.
- 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 : For DTC P0625, GO to D4 .
  For DTC P0626, GO to D6.
- No : INSPECT circuit SDC14 (RD), radial arm adapter and the positive battery cable for loose connections, physical damage or wire corrosion. REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
D4 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 OFF.
- Disconnect: Generator C102A.
- 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
  Courtesy of FORD MOTOR CO.
- Does the test lamp illuminate?
- Yes : GO to D5 .
- 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.
D5 CHECK CIRCUIT CDC15 (VT) FOR DAMAGE OR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: PCM C175B (2.5L or 3.0L).
- Disconnect: PCM C175E (3.5L).
- Inspect the following harness connectors for damaged or pushed-out pins:
  - PCM C175B-14, circuit CDC15 (VT) (2.5L or 3.0L)
  - PCM C175E-26, circuit CDC15 (VT) (3.5L)
  - Generator C102A-1, circuit CDC15 (VT)
- Measure the resistance between generator C102A-1, circuit CDC15 (VT), harness side and ground.
  
  Fig 4: Measuring Resistance Between Generator C102A-1, Circuit CDC15 (VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Are the connectors and pins free of damage and is the resistance greater than 10,000 ohms?
- Yes : GO to D10.
- No : REPAIR the connector(s) and/or circuit CDC15 (VT). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
D6 CHECK THE GENERATOR B+ RESISTANCE
- Ignition OFF.
- Disconnect the battery. Refer to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article.
- Disconnect: Generator C102B.
- Measure the resistance between generator C102B, component side and the generator housing.
  
  Fig 5: Measuring Resistance Between Generator C102B, Component Side And Generator Housing
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 25K ohms?
- Yes : GO to D7 .
- No : 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.

D7 CHECK THE RESISTANCE OF THE VOLTAGE REGULATOR INTERNAL CIRCUITS TO GROUND

Disconnect: Generator C102A.

Measure the resistance between generator C102A, component side and ground. Refer to the following table.

TERMINAL RESISTANCE REFERENCE TABLE

Pin	Expected Resistance
1	Greater than 10K ohms
2	Greater than 10K ohms
3	Greater than 10K ohms

Are the resistance values as indicated?

Yes : GO to D8 .
No : 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.

D8 CHECK CIRCUIT CDC15 (VT) FOR DAMAGE OR AN OPEN
- Ignition OFF.
- Disconnect: PCM C175B (2.5L or 3.0L).
- Disconnect: PCM C175E (3.5L).
- Inspect the following harness connectors for damaged or pushed-out pins:
  - PCM C175B-14 (2.5L or 3.0L), circuit CDC15 (VT)
  - PCM C175E-26 (3.5L), circuit CDC15 (VT)
  - Generator C102A-1, circuit CDC15 (VT)
- For 2.5L or 3.0L engines, measure the resistance between PCM C175B-14, circuit CDC15 (VT), harness side and generator C102A-1, circuit CDC15 (VT), harness side.
- For 3.5L engines, measure the resistance between PCM C175E-26, circuit CDC15 (VT), harness side and generator C102A-1, circuit CDC15 (VT), harness side.
- Are the connectors and pins free of damage and is the resistance less than 5 ohms?
- Yes : GO to D9 .
- No : REPAIR the connector(s) and/or circuit CDC15 (VT). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
D9 CHECK CIRCUIT CDC15 (VT) FOR A SHORT TO POWER
- Connect the battery. Refer to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article.
- Ignition ON.
- Measure the voltage between generator C102A-1, circuit CDC15 (VT), harness side and ground.
  
  Fig 6: Measuring Voltage Between Generator C102A-1, Circuit CDC15 (VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is there any voltage present?
- Yes : REPAIR the connector(s) and/or circuit CDC15 (VT). CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
- No : GO to D10 .
D10 COMPARE THE PCM PIDs GENERATOR MONITOR (GENMON) AND GENERATOR COMMAND (GENCMD)
- Ignition OFF.
- Connect: PCM C175B (2.5L or 3.0L).
- Connect: PCM C175E (3.5L).
- 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 7: Identifying Fused Jumper Wire Connection Between Generator C102A-1, CDC15 (VT), Harness Side And Generator C102A-2, Circuit CDC10 (BU/OG)
  Courtesy of FORD MOTOR CO.
- Start the engine.
- Using the active command, set the GENVDSD PID to 14.0 volts.
- Monitor the GENMON and GENCMD PIDs while carrying out a wiggle test on the generator wiring harness.
- Does the GENMON PID read within 2% of the GENCMD PID?
- 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 : GO to D11 .
D11 CHECK FOR CORRECT PCM OPERATION
- Ignition OFF.
- Disconnect: Fused Jumper Wire.
- Check the PCM harness, generator harness, PCM component side and generator component side connectors for:
  - corrosion.
  - pushed-out/bent pins.
- Connect the PCM and/or generator connectors. Make sure the connectors seat correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.5L -- FUSION & MILAN (EXCEPT HYBRID) article for 2.5L engines, ELECTRONIC ENGINE CONTROLS - 3.0L (4V) -- FUSION & MILAN article for 3.0L engines or ELECTRONIC ENGINE CONTROLS - 3.5L -- FUSION & MKZ article for 3.5L engines. CLEAR the DTCs.
  REPEAT the self-test. TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.