ECD SYSTEM, Diagnostic DTC:P1450

DTC Code DTC Name
P1450 Fault Path for EGR Valve Long Time Drift

DESCRIPTION

Refer to DTC P0401.

Click here

Tech Tips

For more information on the EGR control, refer to System Description.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1450 Fault Path for EGR Valve Long Time Drift

When difference between first EGR valve learning value and current learning value exceeds threshold.

(3 trip detection logic)

 EGR valve position sensor (EGR valve assembly) Does not come on DTC stored
Related Data List
DTC No. Data List
P1450

  • First Learnt Offset-Value of EGR Valve

  • Last Learnt Offset-Value of EGR Valve

WIRING DIAGRAM

Refer to DTC P0405.

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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

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning V alues 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 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. READ VALUE USING GTS (FIRST LEARNT OFFSET-VALUE OF EGR VALVE AND LAST LEARNT OFFSET-VALUE OF EGR VALVE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / First Learnt Offset-Value of EGR Valve and Last Learnt Offset-Value of EGR Valve.


      Powertrain > Engine and ECT > Data List
      Tester Display
      First Learnt Offset-Value of EGR Valve
      Last Learnt Offset-Value of EGR Valve

    4. Read the value.

      OK
      Deviation value should be less than 10%.

      Tech Tips

      EGR value is operated correctly if there is no difference among the above values.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE EGR VALVE ASSEMBLY Click here

    OK

  2. CHECK WHETHER DTC OUTPUT RECURS (DTC P1450)


    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: Engine and ECT / Trouble Codes.


      Powertrain > Engine and ECT > Trouble Codes

    8. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P1450 B

    A

    END

    B

  3. REPLACE EGR VALVE ASSEMBLY


    1. Replace the EGR valve assembly.

      Click here

    2. Perform EGR learning value reset.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. 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.


      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END