EMISSION CONTROL SYSTEM 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 fuel injector assembly operating sounds.

   3. When the accelerator pedal is released, check that fuel injector assembly 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. 

      Slide the clip and disconnect the No. 1 fuel vapor feed hose from the purge VSV.

   3. Start the engine.

   4. Turn the GTS on.

   5. 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

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

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

      
      

      • Purge VSV

      • Clogging in the No. 1 fuel vapor feed hose that connects the intake air surge tank assembly and purge VSV

      • Voltage from the ECM PRG terminal

      
      

      • w/ Canister Pump Module:

        Click here

      • w/o Canister Pump Module:

        Click here

   8. Exit Active Test mode, connect the No. 1 fuel vapor feed hose to the purge VSV and slide the clip to secure it.

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

      
      Powertrain > Engine > Data List

      Tester Display
      EVAP (Purge) VSV

   10. Warm up the engine and drive the vehicle.

   11. 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 (w/ Canister Pump Module)

   
   

   1. Disconnect the fuel tank vent hose sub-assembly from the charcoal canister assembly.

      

      *1	Fuel Tank Cap Assembly	*2	Fuel Tank Vent Hose Sub-assembly
      *a	Pressure Gauge	-	-

   2. Connect a pressure gauge to the fuel tank vent hose sub-assembly.

   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 (0.0787 in.) 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 and check that the pressure is released smoothly.

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

   6. Connect the fuel tank vent hose sub-assembly to the charcoal canister assembly.

5. INSPECT AIR LINE (w/ Canister Pump Module)

   
   
   1. 

      *1	Air Line Tube
      *a	Air

      Disconnect the air line tube from the canister pump module.

   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 canister pump module.