ECD SYSTEM (w/ EGR Cooler Bypass Valve), Diagnostic DTC:P0627

DTC Code DTC Name
P0627 Fuel Pump Control Circuit / Open

DESCRIPTION

Tech Tips

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

DTC No. DTC Detection Condition Trouble Area
P0627

Open or short in suction control valve circuit for more than 0.5 seconds

(1 trip detection logic)

  • Open or short in suction control valve circuit

  • Suction control valve

  • ECM

Tech Tips

When DTC P0627 is set, check the internal fuel pressure of the common rail assembly by entering the following menus on the intelligent tester : Powertrain / Engine and ECT / Data List / Fuel Press.

Engine Speed Fuel Pressure
Idling Approximately 30,000 to 40,000 kPa
3,000 rpm (No engine load) Approximately 45,000 to 90,000 kPa

WIRING DIAGRAM

A01KF6SE08

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

Note


  • If the supply pump assembly is replaced, the ECM needs initialization Click here.

  • After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

PROCEDURE


  1. INSPECT SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)


    1. A01KGU2E11
      Text in Illustration
      *1 Suction Control Valve

      Disconnect the S11 suction control valve connector.

    2. Measure the resistance of the suction control valve.

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 1.9 to 2.3 Ω

    3. Reconnect the suction control valve connector.


    NG

    REPLACE SUCTION CONTROL VALVE Click here

    OK

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


    1. Disconnect the S11 suction control valve connector.

    2. Disconnect the E11 ECM connector.

    3. Check the resistance.

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      S11-1 - E11-23 (PCV+) Below 1 Ω
      S11-2 - E11-12 (PCV-) Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      S11-1 or E11-23 (PCV+) - Body ground 10 kΩ or higher
      S11-2 or E11-12 (PCV-) - Body ground 10 kΩ or higher

    4. Reconnect the suction control valve connector.

    5. Disconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT ECM (PCV VOLTAGE)


    1. A01KGJPE02
      Text in Illustration
      *1 ECM Connector

      While cranking or idling the engine, check the waveform of the E11 ECM connector using an oscilloscope.

      OK
      Tester Connection Specified Condition
      E11-23 (PCV+) - E11-12 (PCV-) Correct waveform is as shown
      Tool Setting Condition
      10 V/DIV., 5 msec./DIV. Idling or cranking with warm engine

      Tech Tips

      The waveform varies depending on the suction control valve operation.


    NG

    REPLACE ECM Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here