ECD SYSTEM, Diagnostic DTC:P0003, P0004

DTC Code DTC Name
P0003 Fuel Volume Regulator Control Circuit Low
P0004 Fuel Volume Regulator Control Circuit High

DESCRIPTION

Refer to DTC P0001 Click here.

DTC No. DTC Detection Condition Trouble Area
P0003

Short to ground in fuel quantity control valve circuit for 0.1 seconds.

(3 trip detection logic)

  • Open or short in fuel quantity control valve (fuel supply pump assembly) circuit

  • Fuel quantity control valve (fuel supply pump assembly)

  • ECM
DTC No. DTC Detection Condition Trouble Area
P0004

Short to power source in fuel quantity control valve circuit for 0.1 seconds or more

(1 trip detection logic)

  • Open or short in fuel quantity control valve (fuel supply pump assembly) circuit

  • Fuel quantity control valve (fuel supply pump assembly)

  • ECM
Related Data List
DTC No. Data List

P0003

P0004

  • Target Common Rail Pressure

  • Common Rail Pressure

  • Quantity Regulation Valve - Current Value from Common Rail

WIRING DIAGRAM

Refer to DTC P0001 Click here.

CAUTION / NOTICE / HINT

Note


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

  • After replacing the fuel supply pump assembly, the ECM needs initialization Click here.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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 tester 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. INSPECT FUEL SUPPLY PUMP ASSEMBLY (FUEL QUANTITY CONTROL VALVE)


    1. Inspect the fuel quantity control valve (fuel supply pump assembly) Click here.


    NG

    REPLACE FUEL SUPPLY PUMP ASSEMBLY (FUEL QUANTITY CONTROL VALVE) Click here

    OK

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


    1. Disconnect the fuel quantity control valve 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
      B99-2 (PCV) - B91-30 (PCV) Always Below 1 Ω
      B99-2 (PCV) or B91-30 (PCV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. A004S19E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to fuel quantity control valve)

      Disconnect the fuel quantity control valve connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B99-1 (+B) - Body ground Ignition switch ON 11 to 14 V

    OK

    REPLACE ECM Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (FUEL QUANTITY CONTROL VALVE - EFI MAINRELAY)


    1. Disconnect the fuel quantity control valve connector.

    2. Remove the EFI MAIN relay from the engine room No. 1 relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B99-1 (+B) - 5 (EFI MAIN relay holder) Always Below 1 Ω
      B99-1 (+B) or 5 (EFI MAIN relay holder) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  5. CHECK ECM POWER SOURCE CIRCUIT


    1. Check the ECM power source circuit Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. REPLACE FUEL SUPPLY PUMP ASSEMBLY (FUEL QUANTITY CONTROL VALVE)


    1. Replace the fuel supply pump assembly Click here.

    2. Perform supply pump learning value reset Click here.


    NEXT

  9. 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 Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Confirm that the DTC is not output again.


    NEXT

    END