ECD SYSTEM, Diagnostic DTC:P0403, P0404, P0489, P0490

DTC Code DTC Name
P0403 Exhaust Gas Recirculation "A" Control Circuit
P0404 Exhaust Gas Recirculation "A" Control Circuit Range / Performance
P0489 Exhaust Gas Recirculation "A" Control Circuit Low
P0490 Exhaust Gas Recirculation "A" Control Circuit High

DESCRIPTION

Refer to DTC P0401.

Click here

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

Open or short in EGR valve circuit for 0.22 seconds.

(3 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

Either condition is met (3 trip detection logic):


  • EGR valve circuit overcurrent for 0.22 seconds.

  • EGR valve sensor circuit over temperature for 0.22 seconds.

  • Battery short in EGR valve circuit for 0.22 seconds.

  • Open or short in EGR valve circuit

  • EGR valve assembly

  • Cooling fan system

  • ECM

 Comes on DTC stored
P0489 Exhaust Gas Recirculation "A" Control Circuit Low

Ground short in EGR valve circuit for 0.22 seconds.

(3 trip detection logic)

  • Open or short in EGR valve circuit

  • EGR valve assembly

  • ECM

 Comes on DTC stored
P0490 Exhaust Gas Recirculation "A" Control Circuit High

Battery short in EGR valve circuit for 0.22 seconds.

(3 trip detection logic)

  • Open or short in EGR valve circuit

  • EGR valve assembly

  • ECM

 Comes on DTC stored
Related Data Lis
DTC No. Data List

P0403

P0404

P0489

P0490

  • Actual EGR Valve Pos

  • Target EGR Valve Pos

WIRING DIAGRAM

Refer to DTC P0405.

Click here

CAUTION / NOTICE / HINT

Note


  • When replacing the ECM, the ECM needs registration and initialization.

    Click here

  • After replacing the EGR valve assembly, the ECM needs initialization.

    Click here

PROCEDURE


  1. INSPECT EGR VALVE ASSEMBLY


    1. Inspect the EGR valve assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE EGR VALVE ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (EGR VALVE ASSEMBLY - ECM)


    1. Disconnect the EGR 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
      B131-2 (M+) - B112-48 (EGM+) Always Below 1 Ω
      B131-1 (M-) - B112-18 (EGM-) Always Below 1 Ω
      B131-2 (M+) or B112-48 (EGM+) - Body ground Always 10 kΩ or higher
      B131-1 (M-) or B112-18 (EGM-) - Body ground 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


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 6 Click here

  5. REPLACE EGR VALVE ASSEMBLY


    1. Replace the EGR valve assembly.

      Click here

    2. Perform the EGR learning value reset.

      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 / DTC.

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


      Powertrain > Engine and ECT > Trouble Codes

    9. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END