EMISSION CONTROL SYSTEM ON-VEHICLE INSPECTION


  1. INSPECT FUEL CUT-OFF RPM


    1. Increase the engine speed to at least 3500 rpm.

    2. A01I18IE04
      Text in Illustration
      *1 Sound Scope

      Use a sound scope to check for injector operating sounds.

    3. When the accelerator pedal is released, check that injector operating sounds stop momentarily and then resume.

      Standard
      Item Specified Condition
      Fuel injection restart rpm 1400 rpm

      If the result is not as specified, check the injectors, wiring and ECM.

  2. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS


    1. Inspect the hoses and gaskets for scratches, cracks or air/oil leaks from the connecting parts.

      Tech Tips

      If the hoses or gaskets are damaged or some of the connections are loose, they may cause an engine stall or malfunction.

  3. INSPECT EVAPORATIVE EMISSION CONTROL SYSTEM


    1. Connect the Techstream to the DLC3.

    2. A01I0SY

      Disconnect the fuel vapor feed hose from the purge VSV shown in the illustration.

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.

    5. Check that vacuum occurs at the purge VSV port.

    6. If vacuum does not occur, check the following items.

      Tech Tips


      • Purge VSV (for canister purge)

      • Clogging in the fuel vapor feed hose connecting the intake manifold and purge VSV

      • Voltage from the ECM PRG terminal Click here

    7. Exit Active Test mode and reconnect the fuel vapor feed hose.

    8. Enter the following menus: Powertrain / Engine and ECT / Data List / EVAP Purge VSV.

    9. Warm up the engine and drive the vehicle.

    10. Confirm that the purge VSV opens.

      If the result is not as specified, replace the purge VSV, wire harness or ECM.

  4. CHECK FUEL TANK AND VENT LINE


    1. Disconnect the vent line tube from the charcoal canister sub-assembly.

    2. Connect a pressure gauge to the vent line tube.

      A01I0DRE01
      Text in Illustration
      *1 Fuel Tank Cap *2 Vent Line Tube
      *3 Pressure Gauge - -

    3. Apply 4 kPa (0.04 kgf/cm2, 0.6 psi) of pressure to the vent line of the fuel tank.

      Tech Tips

      Perform this inspection with the fuel tank less than 90% full. When the fuel tank is full, the fuel fill check valve closes and the pressure is released through the 2 mm orifice. As a result, when the fuel tank cap is removed, the pressure does not decrease smoothly.

    4. Check that the fuel tank pressure is maintained for some time, and does not decrease immediately.

      Tech Tips

      If the pressure decreases immediately, one of the following may apply:


      • The fuel tank cap is not completely tightened.

      • The fuel tank cap is damaged.

      • Air is leaking from the vent line.

      • The fuel tank is damaged.

    5. When the fuel tank cap is removed, check that the pressure is released smoothly.

      Tech Tips

      If the pressure does not drop, replace the fuel tank assembly.

    6. Reconnect the vent line tube to the charcoal canister sub-assembly.

  5. INSPECT AIR INLET LINE


    1. A01I0JXE01
      Text in Illustration
      *a Air

      Disconnect the air line tube from the charcoal canister sub-assembly.

    2. Check that air flows freely into the air line.

      If air does not flow freely into the air line, repair or replace the air line tube.

    3. Reconnect the air line tube to the charcoal canister sub-assembly.