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СИСТЕМА ECD (для моделей без контроллера свечей накаливания), Diagnostic DTC:P0651

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DTC Code DTC Name
P0651 Sensor Reference Voltage "B" Circuit / Open
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DESCRIPTION

Refer to DTC P0192.

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Refer to DTC P0405.

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Refer to DTC P2564.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0651 Sensor Reference Voltage "B" Circuit / Open

Supplied power (standard: 5 V) from the ECM to the nozzle vane position sensor, fuel pressure sensor and EGR valve position sensor are lower or higher than threshold.

(1 trip detection logic)

  • Nozzle vane position sensor (turbocharger sub-assembly)

  • Open or short in nozzle vane position sensor (turbocharger sub-assembly) circuit

  • Fuel pressure sensor (common rail assembly)

  • Open or short in fuel pressure sensor (common rail assembly) circuit

  • EGR valve position sensor (electric EGR control valve assembly)

  • Open or short in EGR valve position sensor circuit

  • ECM

 Comes on DTC stored
Table 1. DTC Detection Drive Pattern
DTC No. DTC Detection Drive Pattern
P0651 Ignition switch ON
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WIRING DIAGRAM

Refer to DTC P0192.

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Refer to DTC P0405.

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Refer to DTC P2564.

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CAUTION / NOTICE / HINT

Note:

When replacing the ECM, perform ECM Initialization and Registration.

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Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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.

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (NOZZLE VANE POSITION SENSOR - ECM)


    1. Disconnect the nozzle vane position sensor 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
      B133-3 (VTA1) or B138-38 (VTAI) - Body ground Always 10 kΩ or higher
      B133-1 (VNVC) or B138-37 (VNVC) - Body ground Always 10 kΩ or higher
      B133-2 (VNE2) or B138-36 (VNE2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  2. Click here

    CHECK TERMINAL VOLTAGE (VC VOLTAGE)


    1. A01M1KTC03
      *a

      Front view of wire harness connector

      (to Nozzle Vane Position Sensor)

      Disconnect the nozzle vane position sensor connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B133-1 (VNVC) - B133-2 (VNE2) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

  3. Click here

    CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)


    1. Disconnect the fuel pressure sensor 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
      B127-2 (PCR1) or B138-16 (PC) - Body ground Always 10 kΩ or higher
      B127-3 (VC1) or B138-15 (VCS) - Body ground Always 10 kΩ or higher
      B127-1 (E1) or B138-14 (E2S) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK TERMINAL VOLTAGE (VC VOLTAGE)


    1. A01M3HLC03
      *a

      Front view of wire harness connector

      (to Fuel Pressure Sensor)

      Disconnect the fuel pressure sensor connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B127-3 (VC1) - B127-1 (E1) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK HARNESS AND CONNECTOR (ELECTRIC EGR CONTROL VALVE ASSEMBLY - ECM)


    1. Disconnect the electric EGR control valve assembly 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
      B134-5 (VC) or B138-26 (VCEG) - Body ground Always 10 kΩ or higher
      B134-4 (VTA) or B138-27 (EGLS) - Body ground Always 10 kΩ or higher
      B134-3 (E2) or B138-25 (EEGL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  6. Click here

    CHECK TERMINAL VOLTAGE (VC VOLTAGE)


    1. A01LZ5JC03
      *a

      Front view of wire harness connector

      (to Electric EGR Control Valve Assembly)

      Disconnect the electric EGR control valve assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B134-5 (VC) - B134-3 (E2) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

  7. Click here

    REPLACE TURBOCHARGER SUB-ASSEMBLY (NOZZLE VANE POSITION SENSOR)


    1. Replace the turbocharger sub-assembly.

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      Result
      Proceed to
      NEXT

  8. Click here

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0651)


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.


      1. Powertrain > Engine and ECT > Clear DTCs


    4. Turn the ignition switch off.

    5. Turn the ignition switch to ON.

    6. Turn the ignition switch off and wait for 30 seconds or more.

    7. Turn the ignition switch to ON and wait for 10 seconds or more.

    8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    9. Read the DTCs.


      1. Powertrain > Engine and ECT > Trouble Codes


      Result
      Result Proceed to
      DTC is not output A
      DTC P0651 is output B

  9. Click here

    REPLACE COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)


    1. Replace the common rail assembly.

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      Result
      Proceed to
      NEXT

  10. Click here

    BLEED AIR FROM FUEL SYSTEM


    1. Bleed the air from the fuel system.

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      Result
      Proceed to
      NEXT

  11. Click here

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0651)


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.


      1. Powertrain > Engine and ECT > Clear DTCs


    4. Turn the ignition switch off and wait for 30 seconds or more.

    5. Turn the ignition switch to ON.

    6. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    7. Read the DTCs.


      1. Powertrain > Engine and ECT > Trouble Codes


      Result
      Result Proceed to
      DTC is not output A
      DTC P0651 is output B

  12. Click here

    REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

  13. Click here

    REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY (EGR VALVE POSITION SENSOR)


    1. Replace the electric EGR control valve assembly.

      Click here

      Result
      Proceed to
      NEXT

  14. Click here

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.


      1. Powertrain > Engine and ECT > Clear DTCs


    4. Turn the ignition switch off.

    5. Turn the ignition switch to ON.

    6. Turn the ignition switch off and wait for 30 seconds or more.

    7. Turn the ignition switch to ON and wait for 10 seconds or more.

    8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    9. Confirm that the DTC is not output again.


      1. Powertrain > Engine and ECT > Trouble Codes


      Result
      Proceed to
      NEXT

    • NEXT

      END

  15. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT