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ECD SYSTEM, Diagnostic DTC:P1000

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DTC Code DTC Name
P1000 Low Idle Correction Exceeding the Maximum Drift Limit
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DESCRIPTION

Refer to P0102 (Click here).

DTC No. DTC Detection Condition Trouble Area
P1000

When mass air flow meter calibration value exceeds threshold

(3 trip detection logic)

  • Mass air flow meter

  • Intake air temperature sensor

  • Intake system air leak

  • EGR valve assembly

  • ECM
Table 1. Related Data List
DTC No. Data List
P1000

  • Intake Air Temp (Turbo)

  • Target EGR Position

  • Target EGR Valve Pos

  • Actual EGR Valve Pos
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INSPECTION PROCEDURE

Note:

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

  • After replacing the mass air flow meter, the ECM needs initialization (Click here).

  • After replacing the EGR valve assembly, the ECM needs initialization (Click here).

Tip:

  • 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 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.

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PROCEDURE


  1. Click here

    READ VALUE USING GTS (INTAKE AIR TEMP (TURBO))


    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 / Intake Air Temp (Turbo).

    4. Read the value.

      OK
      Same as actual intake air temperature.

  2. Click here

    CHECK INTAKE SYSTEM


    1. Start the engine

    2. Check air duct between intake silencer, mass air flow meter and turbocharger for leaks.

    3. Check air duct between turbocharger and intake manifold for leaks.

      Tip:

      • oily patches are signs of leaks.

      • Check whether sealing rings on charge air hoses are rolled back or missing.

      OK
      No leakage.

  3. Click here

    PERFORM ACTIVE TEST USING GTS (ACTUATOR TEST OF EGR-VALVE)


    1. Connect the GTS to the DLC3.

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

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Actuator Test of EGR-Valve / Data List / Target EGR Position and Actual EGR Valve Pos.

      OK
      The Actual EGR Valve Pos value follows the Target EGR Position value.

  4. Click here

    REPLACE MASS AIR FLOW METER


    1. Replace the mass air flow meter (Click here).

    2. Perform the air flow meter learning value reset (Click here).


  5. Click here

    CHECK WHETHER DTC OUTPUT RECURS (DTC P1000)


    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: Engine and ECT / Trouble Codes.

    8. Read DTCs.

      Table 2. Result
      Result Proceed to
      No DTC output A
      DTC P1000 B

  6. Click here

    REPLACE EGR VALVE ASSEMBLY


    1. Replace EGR valve assembly (Click here).

    2. Perform EGR learning value reset (Click here).


  7. Click here

    CHECK WHETHER DTC OUTPUT RECURS (DTC P1000)


    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: Engine and ECT / Trouble Codes.

    8. Read DTCs.

      Table 3. Result
      Result Proceed to
      No DTC output A
      DTC P1000 B

  8. Click here

    REPLACE INTAKE AIR TEMPERATURE SENSOR


    1. Replace the intake air temperature sensor (Click here).


  9. Click here

    REPAIR OR REPLACE INTAKE SYSTEM


    1. Repair or replace the malfunctioning parts of the intake system.


  10. Click here

    REPLACE ECM


    1. Replace the ECM (Click here).


  11. Click here

    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: Engine and ECT / Trouble Codes.

    8. Confirm that the DTC is not output again.


  12. Click here

    END