СИСТЕМА ECD (для моделей с контроллером свечей накаливания), Diagnostic DTC:P0403, P0404

DTC Code DTC Name
P0403 Exhaust Gas Recirculation Circuit
P0404 Exhaust Gas Recirculation "A" Control Circuit Range / Performance

DESCRIPTION

Refer to DTC P0400.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0403 Exhaust Gas Recirculation Circuit

Open or short in EGR valve circuit for around 1 second

(1 trip detection logic)

  • Open or short in EGR valve circuit

  • EGR valve assembly

  • ECM

 Comes on DTC stored
P0404 Exhaust Gas Recirculation "A" Control Circuit Range / Performance

One of the following condition is met (2 trip detection logic):


  • EGR valve power stage over temperature for around 3 seconds.

  • Short circuit overload is detected in EGR valve power stage for around 3 seconds.

  • Open or short in EGR valve circuit

  • EGR valve assembly

  • ECM

 Comes on DTC stored
DTC Detection Drive Pattern
DTC No. DTC Detection Drive Pattern
P0403 Ignition switch ON (not engine start)
P0404 Engine runnning
Related Data List
DTC No. Data List
P0403

  • Actual EGR Valve Pos

  • Target EGR Valve Pos
P0404

WIRING DIAGRAM

B0042BKE03
*a Electric EGR Control Valve Assembly

CAUTION / NOTICE / HINT

Note

When replacing the ECM, perform ECM Initialization and Registration.

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Tech Tips


  • 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 ELECTRIC EGR CONTROL VALVE ASSEMBLY (DC MOTOR)


    1. Inspect the electric EGR control valve assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY Click here

    OK

  2. 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
      B134-1 (M+) - B212-51 (EGM+) Always Below 1 Ω
      B134-2 (M-) - B212-21 (EGM-) Always Below 1 Ω
      B134-1 (M+) or B212-51 (EGM+) - Body ground and other terminals Always 10 kΩ or higher
      B134-2 (M-) or B212-21 (EGM-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 6 Click here

  4. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 6 Click here

  5. REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY


    1. Replace the electric EGR control valve assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. 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 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 / Pending.

    8. Confirm that the pending DTC is not output again.


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

    NEXT

    END