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ECD SYSTEM(w/o DPF), 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 (Click here).

Refer to DTC P0405 (Click here).

Refer to DTC P2564 (Click here).

Table 1. P0651
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON

Power voltage (5 V as standard) supplied from ECM to 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
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WIRING DIAGRAM

Refer to DTC P0192 (Click here).

Refer to DTC P0405 (Click here).

Refer to DTC P2564 (Click here).

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CAUTION / NOTICE / HINT

Note:

When replacing the ECM, the ECM needs Registration and Initialization (Click here).

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.

  • Read freeze frame data using the intelligent tester. 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
      B36-3 (VTA1) or B21-38 (VTAI) - Body ground Always 10 kΩ or higher
      B36-1 (VNVC) or B21-37 (VNVC) - Body ground Always 10 kΩ or higher
      B36-2 (VNE2) or B21-36 (VNE2) - Body ground Always 10 kΩ or higher

  2. Click here

    CHECK HARNESS AND CONNECTOR (VC VOLTAGE)


    1. A01VGWAE02

      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 Switch Condition Specified Condition
      B36-1 (VNVC) - B36-2 (VNE2) Ignition switch ON 4.5 to 5.5 V
      Table 2. Text in Illustration
      *a

      Front view of wire harness connector

      (to Nozzle Vane Position Sensor)

  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
      B34-2 (PCR1) or B21-16 (PC) - Body ground Always 10 kΩ or higher
      B34-3 (VC1) or B21-15 (VCS) - Body ground Always 10 kΩ or higher
      B34-1 (E1) or B21-14 (E2S) - Body ground Always 10 kΩ or higher

  4. Click here

    CHECK HARNESS AND CONNECTOR (VC VOLTAGE)


    1. A01VM5ME02

      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 Switch Condition Specified Condition
      B34-3 (VC1) - B34-1 (E1) Ignition switch ON 4.5 to 5.5 V
      Table 3. Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Pressure Sensor)

  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
      B55-5 (VC) or B21-26 (VCEG) - Body ground Always 10 kΩ or higher
      B55-4 (VTA) or B21-27 (EGLS) - Body ground Always 10 kΩ or higher
      B55-3 (E2) or B21-25 (EEGL) - Body ground Always 10 kΩ or higher

  6. Click here

    CHECK HARNESS AND CONNECTOR (VC VOLTAGE)


    1. A01VGWDE01

      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 Switch Condition Specified Condition
      B55-5 (VC) - B55-3 (E2) Ignition switch ON 4.5 to 5.5 V
      Table 4. Text in Illustration
      *a

      Front view of wire harness connector

      (to Electric EGR Control Valve Assembly)

  7. Click here

    REPLACE TURBOCHARGER SUB-ASSEMBLY (NOZZLE VANE POSITION SENSOR)


    1. Replace the turbocharger sub-assembly (Click here).


  8. Click here

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0651)


    1. Connect the intelligent tester to the DLC3.

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

    3. Clear the DTCs (Click here).

    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 / DTC.

    9. Read the DTC.

      Table 5. Result
      Result Proceed to
      No DTC output A
      DTC P0651 B

  9. Click here

    REPLACE COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)


    1. Replace the common rail assembly (Click here).


  10. Click here

    BLEED AIR FROM FUEL SYSTEM


    1. Bleed air from fuel system (Click here).


  11. Click here

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0651)


    1. Connect the intelligent tester to the DLC3.

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

    3. Clear the DTCs (Click here).

    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 / DTC.

    9. Read the DTC.

      Table 6. Result
      Result Proceed to
      No DTC output A
      DTC P0651 B

  12. Click here

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


    1. Replace the electric EGR control valve assembly (Click here).


  13. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR


  14. Click here

    REPLACE ECM


    1. Replace the ECM (Click here).


  15. Click here

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

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

    3. Clear the DTCs (Click here).

    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 / DTC.

    9. Confirm that the DTC is not output again.


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