СИСТЕМА ECD, Diagnostic DTC:P0641

DTC Code DTC Name
P0641 Sensor Reference Voltage "A" Circuit / Open

DESCRIPTION

Refer to DTC P0236.

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Refer to DTC P2122.

Click hereНажмите здесь

Refer to DTC P2454.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0641 Sensor Reference Voltage "A" Circuit / Open

Supplied power (standard: 5 V) from the ECM to the accelerator pedal sensor, diesel turbo pressure sensor and differential pressure sensor are lower or higher than appropriate thresholds.

(1 trip detection logic)

  • Accelerator pedal sensor assembly (accelerator pedal position sensor)

  • Open or short in accelerator pedal position sensor circuit

  • Diesel turbo pressure sensor

  • Open or short in diesel turbo pressure sensor circuit

  • Differential pressure sensor

  • Open or short in differential pressure sensor circuit

  • ECM

Comes on DTC stored
Table 1. DTC Detection Drive Pattern
DTC No. DTC Detection Drive Pattern
P0641 Ignition switch ON

WIRING DIAGRAM

Refer to DTC P0236.

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Refer to DTC P2122.

Click hereНажмите здесь

Refer to DTC P2454.

Click hereНажмите здесь

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.

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL SENSOR ASSEMBLY - ECM)

    1. Disconnect the accelerator pedal sensor 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
      A3-4 (VCPA) or A101-56 (VCPA) - Body ground Always 10 kΩ or higher
      A3-6 (VPA) or A101-55 (VPA) - Body ground Always 10 kΩ or higher
      A3-5 (EPA) or A101-57 (EPA) - Body ground Always 10 kΩ or higher
      A3-1 (VCP2) or A101-53 (VCP2) - Body ground Always 10 kΩ or higher
      A3-3 (VPA2) or A101-52 (VPA2) - Body ground Always 10 kΩ or higher
      A3-2 (EPA2) or A101-54 (EPA2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    GO TO STEP 14


    OK
  2. CHECK TERMINAL VOLTAGE (VC VOLTAGE)

    A012HL7C01
    *a

    Front view of wire harness connector

    (to Accelerator Pedal Sensor Assembly)

    1. Disconnect the accelerator pedal sensor 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
      A3-4 (VCPA) - A3-5 (EPA) Ignition switch ON 4.5 to 5.5 V
      A3-1 (VCP2) - A3-2 (EPA2) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    GO TO STEP 11


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

    1. Disconnect the differential 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
      B131-2 (PEX) or A101-32 (PEX) - Body ground Always 10 kΩ or higher
      B131-3 (VC) or A101-33 (VCPX) - Body ground Always 10 kΩ or higher
      B131-1 (E2) or A101-34 (EPEX) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    GO TO STEP 14


    OK
  4. CHECK TERMINAL VOLTAGE (VC VOLTAGE)

    A012F25C04
    *a

    Front view of wire harness connector

    (to Differential Pressure Sensor)

    1. Disconnect the differential 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
      B131-3 (VC) - B131-1 (E2) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    GO TO STEP 11


    OK
  5. CHECK HARNESS AND CONNECTOR (DIESEL TURBO PRESSURE SENSOR - ECM)

    1. Disconnect the diesel turbo 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
      B126-2 (PIM) or A101-13 (PIM) - Body ground Always 10 kΩ or higher
      B126-3 (VC) or A101-14 (VPIM) - Body ground Always 10 kΩ or higher
      B126-1 (E) or A101-15 (EPIM) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  6. CHECK TERMINAL VOLTAGE (VC VOLTAGE)

    A012F25C05
    *a

    Front view of wire harness connector

    (to Diesel Turbo Pressure Sensor)

    1. Disconnect the diesel turbo 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
      B126-3 (VC) - B126-1 (E) Ignition switch ON 4.75 to 5.25 V
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  7. REPLACE DIESEL TURBO PRESSURE SENSOR

    1. Replace the diesel turbo pressure sensor.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT
  8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0641)

    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 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.

      Powertrain > Engine and ECT > Trouble Codes
      Result
      ResultProceed to
      DTC is not outputA
      DTC P0641 is outputB
    A

    END


    B
  9. REPLACE DIFFERENTIAL PRESSURE SENSOR

    1. Replace the differential pressure sensor.

      Click here Нажмите здесь

      Result
      Proceed to
      NEXT
    NEXT
  10. CHECK WHETHER DTC OUTPUT RECURS (DTC P0641)

    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 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.

      Powertrain > Engine and ECT > Trouble Codes
      Result
      ResultProceed to
      DTC is not outputA
      DTC P0641 is outputB
    A

    END


    B Нажмите здесь

  11. REPLACE ECM

    1. Replace the ECM.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 13


  12. REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

    1. Replace the accelerator pedal sensor assembly.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT
  13. 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.

      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. Confirm that the DTC is not output again.

      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT
    NEXT

    END


  14. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT
    NEXT Нажмите здесь

    GO TO STEP 13