ECD SYSTEM, Diagnostic DTC:P0627

DTC Code DTC Name
P0627 Fuel Pump Control Circuit / Open

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0627 Fuel Pump Control Circuit / Open Even though the CPU (command area inside the ECU) is outputting the suction control valve operation duty, the output monitor signal is absent for 0.5 seconds (1 trip detection logic).

  • Open or short in suction control valve circuit

  • Suction control valve (fuel supply pump assembly)

  • ECM

 Comes on DTC stored
Related Data List
DTC No. Data List
P0627

Common Rail Pressure

Target Common Rail Pressure

Tech Tips


  • For more information on the fuel supply pump assembly (suction control valve) and common rail system, refer to System Description Click here.

  • When DTC P0627 is stored, check the internal fuel pressure of the common rail by entering the following menus on the GTS: Powertrain / Engine / Data List / Common Rail Pressure.

    Under a stable operating condition such as idling, Common Rail Pressure is within 5000 kPa of Target Common Rail Pressure.

CONFIRMATION DRIVING PATTERN

P0627
DTC Detection Drive Pattern Idling for 1 second

WIRING DIAGRAM

Refer to DTC P0088 Click here.

CAUTION / NOTICE / HINT

Note


  • After replacing the ECM, the new ECM needs registration (See page ) and initialization Click here.

  • After replacing the fuel supply pump assembly, the ECM needs initialization Click here.

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. INSPECT FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)


    1. Inspect the fuel supply pump assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM)


    1. Disconnect the suction control valve connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      C119-1 - C55-2 (PCV+) Always Below 1 Ω
      C119-2 - C55-1 (PCV-) Always Below 1 Ω
      C119-1 or C55-2 (PCV+) - Body ground Always 10 kΩ or higher
      C119-2 or C55-1 (PCV-) - Body ground Always 10 kΩ or higher

    4. Reconnect the suction control valve connector.

    5. Reconnect the ECM connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0627)


    1. Connect the GTS to the DLC3

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    4. Start the engine and idle it for 1 second or more.

    5. Enter the following menus: Powertrain / Engine / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    6. Read the DTCs.

      Result
      Result Proceed to
      No DTC is output A
      P0627 is output B

    A

    END

    B

    REPLACE ECM Click here

  4. REPLACE FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)


    1. Replace the fuel supply pump assembly.

      Click here

      Result
      Proceed to
      NEXT

      Click here


    NEXT

  5. BLEED AIR FROM FUEL SYSTEM


    1. Bleed the air from the fuel system.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. PERFORM FUEL SUPPLY PUMP INITIALIZATION


    1. Perform fuel supply pump initialization.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 9 Click here

  7. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 9 Click here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

  9. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    3. Turn the ignition switch off for 30 seconds or more.

    4. Start the engine and idle it for 1 second or more.

    5. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END