EMISSION CONTROL SYSTEM(w/ Canister Pump Module) ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT FUEL CUT OPERATION


    1. Increase the engine speed to approximately 3000 rpm.

    2. 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 cut-off engine speed 2500 rpm or higher
      Fuel injection restart engine speed 1400 rpm

      If the result is not as specified, check the fuel injector assemblies, wire harness and ECM.

  2. 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 level dipstick, oil filler cap sub-assembly, ventilation hose or other components may cause the engine to run improperly.

      • Air suction caused by disconnections, looseness or cracks in any part of the air induction system between the throttle body with motor assembly and cylinder head sub-assembly will cause engine failure or engine malfunctions.

      If any defects are found, replace parts as necessary.

  3. INSPECT EVAPORATIVE EMISSION CONTROL SYSTEM


    1. Connect the GTS to the DLC3.

    2. B0077MN

      Slide the clip and disconnect the No. 2 fuel vapor feed hose from the purge valve (purge VSV).

    3. Start the engine.

    4. Turn the GTS on.

    5. Warm up the engine.

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


      Powertrain > Engine > Active Test
      Tester Display
      Activate the VSV for Evap Control

    7. Check that vacuum occurs at the purge valve (purge VSV) port.

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


      • Purge valve (purge VSV)

      • Clogging in the No. 2 fuel vapor feed hose that connects the intake air surge tank assembly and purge valve (purge VSV)

      • Voltage from the ECM PRG terminal

        Click here

    9. Exit Active Test mode, connect the No. 2 fuel vapor feed hose to the purge valve (purge VSV) and slide the clip to secure it.

    10. Enter the following menus: Powertrain / Engine / Data List / EVAP (Purge) VSV.


      Powertrain > Engine > Data List
      Tester Display
      EVAP (Purge) VSV

    11. Warm up the engine and drive the vehicle.

    12. Confirm that the purge valve (purge VSV) opens.

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

  4. CHECK FUEL TANK AND VENT LINE


    1. Disconnect the vent line hose from the canister (charcoal canister assembly).

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

      B0073NYC01
      *1 Fuel Tank Cap Assembly *2 Vent Line Hose
      *a Pressure Gauge - -

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

      Tech Tips

      Perform this inspection with the fuel tank assembly less than 90% full. When the fuel tank assembly 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 assembly is removed, the pressure does not decrease smoothly.

    4. Check that the fuel tank assembly 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 assembly is not completely tightened.

      • The fuel tank cap assembly is damaged.

      • Air is leaking from the vent line.

      • The fuel tank assembly is damaged.

    5. Remove the fuel tank cap assembly, check that the pressure is released smoothly.

      If the pressure is not released smoothly, replace the fuel tank assembly.

    6. Connect the vent line hose to the canister (charcoal canister assembly).

  5. INSPECT AIR LINE


    1. B0075LNC01
      *a Air Line Tube
      *b Air

      Disconnect the air line tube from the leak detection pump 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. Connect the air line tube to the leak detection pump sub-assembly.