EMISSION CONTROL SYSTEM ON-VEHICLE INSPECTION

Tech Tips

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


  1. CHECK SEATING OF EGR VALVE


    1. Start the engine. Check that the engine starts and then idles.

  2. INSPECT FOR ENGINE CONDITION


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine, then run it at idle.

    3. Warm up the engine.

      The coolant temperature should be between 75°C (167°F) and 90°C (194°F).

    4. Turn the intelligent tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / EGR Position.

    6. Check that the value of EGR position is within the specification.

      Standard
      Engine Condition EGR Valve Opening Position Expressed as Percentage
      During idling 40 to 70%

      If the result is not as specified, refer to the Inspection section Click here.

  3. VISUALLY CHECK HOSES, CONNECTIONS AND GASKETS


    1. Visually check that the hoses, connections and gaskets have no cracks, leaks or damage.

      Note


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

      • Air suction caused by disconnections, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will cause engine failure or engine malfunction.

      If any defects are found, replace parts as necessary.

  4. AIR BLOW OPERATION

    Tech Tips

    Clean the filter with compressed air if the DPF differential pressure is higher than the standard value. It is probable that excessive particulate matter has accumulated in the DPF.

    Result
    Engine Speed (no engine load) Differential Pressure
    3500 to 3600 rpm (Exhaust Temperature B1S1) is 200°C (392°F) or less) 30 kPa or more

    1. A01CJ3NE02
      Text in Illustration
      *1 Exhaust Gas Temperature Sensor
      *2 Center Pipe Plug

      Remove the center pipe plug shown in the illustration.

      Note

      The center pipe may be hot. Make sure that the pipe is not hot before removing the plug.

      Tech Tips

      Do not remove the center pipe.

    2. Remove the exhaust gas temperature sensor shown in the illustration Click here.

      Tech Tips

      Temporarily cover the hole with tape after removing the exhaust gas temperature sensor.

    3. Apply compressed air.


      1. A01CHB3E02
        Text in Illustration
        *a Open
        *b Closed

        Close the air valve as shown in the illustration and connect an air hose to SST securely.

        SST
        09950-E9010
      2. A01CJFKE02
        Text in Illustration
        *1 Tab
        *2 Air Holes
        *3 Plughole
        *4 Inner Wall
        *a Vehicle Front

        Face the SST air holes towards the front of the vehicle and fully insert SST through the plughole until it contacts the inner wall of the center pipe.

        SST
        09950-E9010

        Tech Tips

        The tab on the disc of SST is provided to allow the operator to determine the direction of the air holes when SST is inside the plughole.

      3. A01CGOBE02
        Text in Illustration
        *1 Catalytic Converter
        *a Air Blow Range

        Open the air valve and move SST within the range as shown in the illustration for 5 minutes while lightly pushing on the inner wall of the center pipe with SST.

        SST
        09950-E9010

        Note


        • Be careful not to hit the catalytic converters with SST.

        • Do not apply compressed air to the rear catalytic converter.

    4. Close the air valve and remove SST.

    5. Remove the air hose from SST.

    6. Install the exhaust gas temperature sensor Click here.

      Tech Tips

      Remove the tape and any particulate matter on or around the exhaust gas temperature sensor installation hole.

    7. Install the plug.

      Torque:
      45 N*m  { 459 kgf*cm, 33 ft.*lbf }