ECD SYSTEM(w/ Glow Plug Controller), Diagnostic DTC:P0003 and 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.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0003

Fuel Volume Regulator Control Circuit Low

Short to ground in suction control valve circuit for 0.1 seconds.

(1 trip detection logic)

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

  • Suction control valve (supply pump assembly)

  • ECM

Comes on

DTC stored

P0004

Fuel Volume Regulator Control Circuit High

Short to power source in suction control valve circuit for 0.1 seconds or more.

(1 trip detection logic)

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

  • Suction control valve (supply pump assembly)

  • ECM

Comes on

DTC stored
Table 1. DTC Detection Drive Pattern

DTC No.

DTC Detection Drive Pattern

P0003

Ignition switch ON

P0004
Table 2. Related Data List

DTC No.

Data List

P0003

P0004

  • Target Common Rail Pressure

  • Common Rail Pressure

  • Target Pump SCV Current

WIRING DIAGRAM

Refer to DTC P0001.

Click here

CAUTION / NOTICE / HINT

Note:

  • When replacing the ECM, perform ECM Initialization and Registration.

    Click here

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

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. INSPECT SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)

    1. Inspect the suction control valve.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)Click here

    OK

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

    1. Disconnect the suction 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

      B123-2 - B212-30 (PCV)

      Always

      Below 1 Ω

      B123-2 or B212-30 (PCV) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF SUCTION CONTROL VALVE)

    A295540C03

    *a

    Front view of wire harness connector

    (to Suction Control Valve)

    1. Disconnect the suction control valve connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      B123-1 - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN RELAY - SUCTION CONTROL VALVE)Click here

    OK

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0003 OR P0004)

    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 and wait for 1 second or more.

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

    7. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC P0003 or P0004 is output

      A

      DTC is not output

      B
    B

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    A

  5. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  6. REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN RELAY - SUCTION CONTROL VALVE)

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  8. REPLACE SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)

    1. Replace the supply pump assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  9. BLEED AIR FROM FUEL SYSTEM

    1. Bleed the air from the fuel system.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  10. 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 and wait for 1 second or more.

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

      Powertrain > Engine and ECT > Trouble Codes

    7. Confirm that the DTC is not output again.

    Result

    Proceed to

    NEXT
    NEXT

    END