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

PROCEDURE

1. INSPECT FUEL CUT RPM

   
   

   1. Start the engine.

   2. Warm up the engine.

   3. Increase the engine speed to approximately 3000 rpm.

   4. Use a sound scope to check for injector operating sounds.

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

      Standard
      Item Specified Condition Fuel cut-off rpm 2500 rpm or higher 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 GTS to the DLC3.

   2. 

      Disconnect the No. 2 fuel vapor feed hose from the purge valve (purge VSV).

   3. Start the engine.

   4. 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

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

   6. 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

   7. Exit Active Test mode and reconnect the No. 2 fuel vapor feed hose.

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

      
      Powertrain > Engine > Data List

      Tester Display
      EVAP (Purge) VSV

   9. Warm up the engine and drive the vehicle.

   10. 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.

      

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

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

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

5. INSPECT AIR LINE

   
   
   1. 

      *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. Reconnect the air line tube to the leak detection pump sub-assembly.