ECD SYSTEM(w/ DPF), Diagnostic DTC:P0651

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

DESCRIPTION

Refer to DTC P0192 Click here.

Refer to DTC P0400 Click here.

Refer to DTC P2564 Click here.

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

WIRING DIAGRAM

Refer to DTC P0192 Click here.

Refer to DTC P0403 Click here.

Refer to DTC P2564 Click here.

CAUTION / NOTICE / HINT

Note

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

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. 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 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.

PROCEDURE


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


    1. Disconnect the B36 nozzle vane position sensor connector.

    2. Disconnect the B104 ECM connector (for LHD).

    3. Disconnect the B103 ECM connector (for RHD).

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B36-3 (VTA1) or B104-82 (VTAI) - Body ground Always 10 kΩ or higher
      B36-1 (VNVC) or B104-67 (VNVC) - Body ground Always 10 kΩ or higher
      B36-2 (VNE2) or B104-114 (VNE2) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      B36-3 (VTA1) or B103-82 (VTAI) - Body ground Always 10 kΩ or higher
      B36-1 (VNVC) or B103-67 (VNVC) - Body ground Always 10 kΩ or higher
      B36-2 (VNE2) or B103-114 (VNE2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  2. CHECK TERMINAL VOLTAGE (VC VOLTAGE)


    1. A01VLEPE02
      Text in Illustration
      *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 Switch Condition Specified Condition
      B36-1 (VNVC) - B36-2 (VNE2) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)


    1. Disconnect the B34 fuel pressure sensor connector.

    2. Disconnect the B104 ECM connector (for LHD).

    3. Disconnect the B103 ECM connector (for RHD).

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B34-2 (PCR1) or B104-85 (PC) - Body ground Always 10 kΩ or higher
      B34-3 (VC1) or B104-70 (VCS) - Body ground Always 10 kΩ or higher
      B34-1 (E1) or B104-117 (E2S) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      B34-2 (PCR1) or B103-85 (PC) - Body ground Always 10 kΩ or higher
      B34-3 (VC1) or B103-70 (VCS) - Body ground Always 10 kΩ or higher
      B34-1 (E1) or B103-117 (E2S) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  4. CHECK TERMINAL VOLTAGE (VC VOLTAGE)


    1. A01VE71E01
      Text in Illustration
      *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 Switch Condition Specified Condition
      B34-3 (VC1) - B34-1 (E1) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

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


    1. Disconnect the B55 electric EGR control valve assembly connector.

    2. Disconnect the B104 ECM connector (for LHD).

    3. Disconnect the B103 ECM connector (for RHD).

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B55-5 (VC) or B104-64 (VCEG) - Body ground Always 10 kΩ or higher
      B55-4 (VTA) or B104-79 (EGLS) - Body ground Always 10 kΩ or higher
      B55-3 (E2) or B104-111 (EEGL) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      B55-5 (VC) or B103-64 (VCEG) - Body ground Always 10 kΩ or higher
      B55-4 (VTA) or B103-79 (EGLS) - Body ground Always 10 kΩ or higher
      B55-3 (E2) or B103-111 (EEGL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  6. CHECK TERMINAL VOLTAGE (VC VOLTAGE)


    1. A01VH8GE01
      Text in Illustration
      *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 Switch Condition Specified Condition
      B55-5 (VC) - B55-3 (E2) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

  7. REPLACE TURBOCHARGER SUB-ASSEMBLY (NOZZLE VANE POSITION SENSOR)


    1. Replace the turbocharger sub-assembly Click here.


    NEXT

  8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0651)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off.

    6. Turn the ignition switch to ON.

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

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

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

    10. Read the DTC.

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

    A

    END

    B

  9. REPLACE COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)


    1. Replace the common rail assembly Click here.


    NEXT

  10. BLEED AIR FROM FUEL SYSTEM


    1. Bleed air from fuel system Click here.


    NEXT

  11. CHECK WHETHER DTC OUTPUT RECURS (DTC P0651)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off.

    6. Turn the ignition switch to ON.

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

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

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

    10. Read the DTC.

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

    A

    END

    B

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


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


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  13. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  14. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  15. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off.

    6. Turn the ignition switch to ON.

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

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

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

    10. Confirm that the DTC is not output again.


    NEXT

    END