EMISSION CONTROL SYSTEM (w/o DPF) ON-VEHICLE INSPECTION

Note

Always stop the engine before installing or removing the vacuum gauges, or removing the vacuum hoses.

Tech Tips

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


  1. INSPECT ELECTRIC EGR CONTROL VALVE ASSEMBLY


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      Using a 3-way connector, connect a vacuum gauge to the hose between the EGR valve and E-VRV.

    2. Check the seating of the electric EGR control valve.


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

    3. Check the output vacuum with the vacuum gauge.


      1. Warm up the engine and check that the vacuum gauge reading is above 87 kPa (650 mmHg, 25.6 in.Hg).

        If the result is not as specified, replace the vacuum pump.

    4. Check "hot" engine condition.


      1. Visually check the vacuum hose between the vacuum pump and the EGR valve for leaks.

      2. Warm up the engine. The coolant temperature should be between 75°C (167°F) and 90°C (194°F).

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        Check that the vacuum gauge reading is approximately 28.0 kPa (210 mmHg, 8.3 in.Hg) at idle.

      4. Check that the vacuum gauge reading increases to more than 28.0 kPa (210 mmHg, 8.3 in.Hg) at 1500 rpm.

      5. Fully depress the accelerator quickly and check that the vacuum gauge reading drops momentarily.

      6. Keep the engine speed at more than 4000 rpm.

        Standard condition
        3.6 kPa (27 mmHg, 1.1 in.Hg)

      7. When the accelerator pedal is released, check that the vacuum gauge reading drops momentarily while the engine speed decreases from more than 4000 rpm to idle.

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

    5. Remove the vacuum gauge and connect the vacuum hose to the electric EGR control valve.

  2. VISUALLY CHECK HOSES, CONNECTIONS AND GASKETS


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      Check the appearance.


      1. Check if there are any cracks, damage or leaks on the indicated portions of the engine assembly.

        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 malfunctions.

        If the result is not as specified, replace parts as necessary.

  3. CHECK VACUUM PUMP ASSEMBLY

    Click here