EMISSION CONTROL SYSTEM ON-VEHICLE INSPECTION

Tech Tips

In a malfunction where the EGR system is always on, black or white smoke may be emitted from the exhaust pipe.


  1. INSPECT SEATING OF EGR VALVE


    1. Start the engine, and then check that the engine starts and runs at idle.

  2. INSPECT EGR VALVE OPERATION


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain Engine and ECT / Active Test / Control the EGR Step Position.

    5. Check the Data List / Target EGR Position and Actual EGR valve pos.

      Standard Percentage
      Control Range Condition Specified Condition
      Active Test performed (Set EGR position to 0% → 25% → 50% → 75% → 100% → 75% → 50% → 25% → 0%) Actual EGR valve opening percentage changes according to Active Test operation

  3. INSPECT EGR BY-PASS VALVE ASSEMBLY


    1. Disconnect the vacuum hose from the EGR by-pass valve.

    2. A0119ROE01
      Text in Illustration
      *1 EGR By-pass Valve
      *2 Rod

      Apply vacuum and then check that the rod of the EGR by-pass valve operates as shown in the illustration.

      If the rod does not operate, replace the EGR by-pass valve.

  4. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS


    1. Check for cracks, leaks or damage.


      1. A011A35

        Check the engine assembly.

        Tech Tips

        Detachment or other problems with the engine oil dipstick, filler cap and other components loose parts may cause the engine to run improperly.

        If any defects are found, replace the parts as necessary.