СИСТЕМА СНИЖЕНИЯ ТОКСИЧНОСТИ ОТРАБОТАВШИХ ГАЗОВ ПРОВЕРКА БЕЗ СНЯТИЯ С АВТОМОБИЛЯ


  1. CHECK PURGE VSV


    1. Check that the purge line hose is connected correctly.

    2. B007S24

      Slide the clip and disconnect the purge line hose from the purge VSV and connect a vacuum gauge.

    3. Using the procedure below, perform a purge VSV operation inspection when the engine coolant temperature is 55°C (131°F) or less (while the engine is cold (purge VSV is closed)).

      Tech Tips

      The ECM turns the purge VSV off so that the route between the canister and intake manifold is closed and fuel vapor in the charcoal canister assembly is not purged to the intake manifold.


      1. Purge VSV operation inspection procedure.

        1. When the engine is idling or running at 2500 rpm, the vacuum gauge indicates 1 kPa (25 mmHg, 0.3 in.Hg) or less.

        Result
        Result Procedure
        Yes Purge VSV operation normal
        No Go to next step

        2. Inspect the purge VSV Click here.

        Result
        Result Procedure
        OK Check wire harness and ECM
        NG Replace purge VSV

    4. Using the procedure below, perform a purge VSV operation inspection when the engine coolant temperature is 80°C (146°F) or higher (while the engine is hot (purge VSV is opened)).

      Tech Tips

      The ECM turns the purge VSV on so that a vacuum is created in the intake manifold and the fuel vapors of the charcoal canister assembly are purged to the intake manifold.


      1. Purge VSV operation inspection procedure.

        1. When the engine is idling, the vacuum gauge indicates 40 kPa (300 mmHg, 11.8 in.Hg) or higher.

        Result
        Result Procedure
        Yes Purge VSV operation normal
        No Go to next step

        2. Inspect the purge VSV Click here.

        Result
        Result Procedure
        OK Check wire harness, ECM and purge line hose between purge VSV and intake manifold
        NG Replace purge VSV

  2. INSPECT FUEL CUT-OFF OPERATION


    1. Start and warm up the engine.

    2. Maintain the engine speed at 3000 rpm.

    3. Use a sound scope to check for fuel injector operation noise.

    4. Check that when the accelerator pedal is released, fuel injector operation noise stops momentarily and then resumes.

      If the result is not as specified, check the fuel injector assembly, wiring and ECM.

  3. VISUALLY INSPECT HOSES, CONNECTORS AND GASKETS


    1. Check that there are no cracks, leaks or damage.

      Note


      • Detachment or other problems with the engine oil dipstick, oil 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 assembly and cylinder head sub-assembly will cause engine failure or engine malfunctions.

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

  4. CHECK HOSES AND CONNECTORS


    1. Visually check for loose connections, sharp bends or damage.

  5. CHECK FUEL TANK ASSEMBLY


    1. Visually check for deformation, cracks or fuel leakage.

  6. INSPECT SECONDARY AIR INJECTION SYSTEM OPERATION


    1. Start the engine and warm it up.

    2. Turn the ignition switch off.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON and turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Manual Mode / AIR PUMP: ON, ASV: OPEN, and AIR PUMP: OFF, ASV: CLOSE.

      Tech Tips

      When Manual Mode is selected, intelligent tester initialization (atmospheric pressure measurement) is performed automatically. Initialization takes 10 seconds. After initialization, AIR PUMP and ASV operation can be selected.

    6. Start the engine.

    7. Perform the AIR system intrusive operation while the engine is idling.

    8. Check that the air pump (AIR PUMP), ASV and pressure in the AIR system passage (PRESSURE) status displayed on the intelligent tester indicate the conditions shown in the table below.

      Standard
      Tester Operation AIR PUMP ASV PRESSURE*1 PULSATION*2
      AIR PUMP: ON, ASV: OPEN ON ON 2.4 kPa or higher 20 kPa or higher
      AIR PUMP: OFF, ASV: CLOSE OFF OFF Below 2.4 kPa Below 30 kPa

      *1:

      Average pumping pressure (gauge pressure). The pressure should be 2.4 kPa or higher when the AIR system operates.

      *2:

      The cumulative exhaust pulsation calculated by the ECM. If the calculated value exceeds a certain level, the ECM determines that the exhaust pulsation is in the AIR system.

    9. Turn the ignition switch off.

      Note


      • Secondary Air Injection Check only allows technicians to operate the AIR system for a maximum of 5 seconds.

        Furthermore, the check can only be performed up to 4 times per trip. If the test is repeated, intervals of at least 30 seconds are required between checks.

        While AIR system operation using the intelligent tester is prohibited, the intelligent tester display indicates the prohibition (WAIT or ERROR).

        If ERROR is displayed on the intelligent tester during the test, stop the engine for 10 minutes, and then try again.

      • Performing Secondary Air Injection Check repeatedly may cause damage to the AIR system. If necessary, leave an interval of several minutes between Secondary Air Injection Check operations to prevent the system from overheating.

      • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned to ON or the engine running.

      • Turn the ignition switch off when the Secondary Air Injection Check operation finishes.