ECD SYSTEM Abnormal Temperature Detection by Exhaust Temperature Sensor (Downstream)

INSPECTION PROCEDURE

Tech Tips


  • If the exhaust temperature sensor detects an abnormally high temperature, conduct the following inspection.

  • Check the amount of engine oil after troubleshooting is finished.

  • If the amount of engine oil is more than the specified level, replace the engine oil.

PROCEDURE


  1. CHECK OTHER DTC OUTPUT


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to the ON position.

    4. Turn the tester on.

    5. Enter the following menu items: Powertrain / Engine and ECT / DTC.

    6. Read the DTCs.

      Result
      Display (DTC output) Proceed to
      P2002 A
      P2002 and other DTCs B

    B

    GO TO DTC CHART

    A

  2. INSPECT FUEL SYSTEM


    1. Warm up the engine.

    2. Disconnect the negative battery terminal and wait for at least 1 minute.

    3. Reconnect the negative battery terminal.

    4. Initialize the learning value of the supply pump Click here.

      Tech Tips

      Perform initialization with the engine warmed up (engine coolant temperature is 60°C (140°F) or more and fuel temperature is 20°C (68°F) or more).

    5. Initialize the learning value of the diesel throttle body Click here.

    6. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    7. Connect the intelligent tester to the DLC3.

    8. Start the engine and turn the tester ON.

    9. Select the following menu items: Powertrain / Engine and ECT / Active Test / Test the Fuel Leak.

    10. Perform the active test.

    11. Visually check the supply pump, injector and fuel line located between the supply pump and common rail for fuel leaks and fuel pressure leaks. Also, perform the same check on the fuel line between the common rail and the injector.

    12. Check that the fuel filter is not clogged.


    NEXT

  3. INSPECT FOR ENGINE OIL LEAK


    1. Check that the intake system pipes and hoses are not excessively contaminated with oil.

      Tech Tips


      • If the pipes or hoses are contaminated with oil, clean them.

      • If pipes or hoses are contaminated with a large amount of oil, repair or replace the parts and areas where the engine oil is leaking from.

    2. Check if the engine oil is leaking from the turbocharger.


    NEXT

  4. READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE)


    1. Clear the DTCs Click here.

    2. Perform the forcible regeneration function Click here.

    3. After the forcible regeneration is completed, allow the engine to idle for at least 5 minutes.

    4. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    5. Connect the intelligent tester to the DLC3.

    6. Turn the ignition switch to the ON position.

    7. Turn the tester on.

    8. Enter the following menu items: Powertrain / Engine and ECT / Data List / DPF Differential Pressure.

    9. Check the differential pressure when the exhaust gas temperature sensor indicates 200°C or less.

      Tech Tips


      • If the exhaust gas temperature is high, the differential pressure cannot be measured correctly.

      • If the differential pressure is outside the normal range, the monolithic converter assembly may have deteriorated or the monolithic converter assembly may be clogged with PM.

      • Fully depress the accelerator pedal and when the engine speed becomes stable, promptly read the differential pressure.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3,500 to 3,600 rpm (Exhaust gas temperature (up stream) is 200°C or less) 15 kPa or less (MIL is not illuminated) A
      3,500 to 3,600 rpm (Exhaust gas temperature (up stream) is 200°C or less) 15 kPa or more (MIL is not illuminated) C
      Result
      Engine Speed (no engine load) Result Proceed to
      3,500 to 3,600 rpm (Exhaust gas temperature (up stream) is 200°C or less) MIL remains ON B

    B

    GO TO DPF FORCIBLE REGENERATION PROCEDURE

    C

    REPLACE MONOLITHIC CONVERTER ASSEMBLY

    A

    END