FUEL SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK


    1. Check fuel pump operation.


      1. Connect the GTS to the DLC3.

      2. Turn the engine switch on (IG).

        Note

        Do not start the engine.

      3. Turn the GTS on.

      4. Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.


        Powertrain > Engine > Active Test
        Tester Display
        Activate the Circuit Relay

      5. Check for pressure in the fuel tube sub-assembly from the fuel line. Check that sounds of fuel flowing from the fuel tank assembly can be heard. If no sounds can be heard, check the relay, fuel pump, ECM and wiring connectors.

    2. Inspect for fuel leaks.


      1. Check that there are no fuel leaks from the fuel system after doing any maintenance or repairs. If there is a fuel leak, repair or replace parts as necessary.

    3. Turn the engine switch off.

    4. Disconnect the GTS from the DLC3.

  2. CHECK FUEL PRESSURE


    1. Discharge fuel system pressure.

      Click here

    2. Measure the battery voltage.

      Standard Voltage
      11 to 14 V

    3. Disconnect the cable from the negative (-) battery terminal.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Click here

    4. B0076PF

      Disconnect the fuel tube sub-assembly (for Direct Injection).


      1. Disconnect the fuel tube sub-assembly from the fuel pump assembly.

        Click here

    5. B0073ZR

      Disconnect the fuel tube sub-assembly (for Port Injection).


      1. Disconnect the fuel tube sub-assembly from the fuel delivery pipe.

        Click here

    6. B0076TJC03
      *1 Fuel Tube Sub-assembly (Vehicle Side)
      *a SST (Hose Band)
      *b SST (T-joint)
      *c SST (Gauge)
      *d SST (Hose Joint)
      *e SST (Hose)
      *f SST (Fuel Tube Connector)
      *g Fuel Pipe (Vehicle Side)

      Install SST (EFI fuel pressure gauge) as shown in the illustration.

      SST
      09268-45101   ( 09268-41250, 09268-41260, 09268-41280, 09268-41500, 09268-41700, 95336-08070 )

    7. Wipe up any spilled fuel.

    8. Connect the cable to the negative (-) battery terminal.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Click here

    9. Connect the GTS to the DLC3.

    10. Turn the engine switch on (IG).

      Note

      Do not start the engine.

    11. Turn the GTS on.

    12. Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.


      Powertrain > Engine > Active Test
      Tester Display
      Activate the Circuit Relay

    13. Measure the fuel pressure.

      Standard Fuel Pressure
      196 to 833 kPa (2.0 to 8.5 kgf/cm2, 28 to 121 psi)

      • If the fuel pressure is less than the standard, check the fuel hoses and their connections, fuel pump, fuel filter and fuel main valve assembly.

      • If the result is not as specified, replace the fuel main valve assembly.

    14. Disconnect the GTS from the DLC3.

    15. Start the engine.

    16. Measure the fuel pressure at idle.

      Standard Fuel Pressure
      196 to 833 kPa (2.0 to 8.5 kgf/cm2, 28 to 121 psi)

      Tech Tips

      Refer to Standard Idle Speed.

      Click here

    17. Stop the engine.

    18. Check that the fuel pressure remains as specified for 5 minutes.

      Standard Fuel Pressure
      98 kPa (1.0 kgf/cm2, 14.2 psi) or more

      If the result is not as specified, check the fuel pump, fuel main valve assembly and/or port fuel injector assemblies.

    19. After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST to prevent fuel from spraying.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Click here

    20. Connect the fuel tube sub-assembly (for Port Injection).


      1. Connect the fuel tube sub-assembly to the fuel delivery pipe.

        Click here

    21. Connect the fuel tube sub-assembly (for Direct Injection).


      1. Connect the fuel tube sub-assembly to the fuel pump assembly.

        Click here

    22. Inspect for fuel leaks.

      Click here

  3. CHECK FUEL PRESSURE (for High Pressure)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Start and warm up the engine.

    5. Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (High).


      Powertrain > Engine > Data List
      Tester Display
      Fuel Pressure (High)

    6. Check the high pressure side fuel pressure at 3000 rpm (shift lever in N, engine warmed up and A/C off).

      Standard Fuel Pressure
      4000 to 8000 kPa (40.8 to 81.6 kgf/cm2, 580 to 1160 psi)

      If the result is not as specified, check the fuel pump, fuel pump assembly, fuel pressure sensor and wire harnesses.

    7. Stop the engine.

  4. ACTIVE TEST (Control the Select Cylinder Fuel Cut)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Select Cylinder Fuel Cut. Select a cylinder from #1 to #4.


      Powertrain > Engine > Active Test
      Tester Display
      Control the Select Cylinder Fuel Cut

      Tech Tips

      Perform the Active Test with the vehicle stopped and the engine idling.

    5. After stopping injection of the cylinder for which the Active Test was performed, check the idling state.

      OK
      The idling speed changes.

      Tech Tips

      Perform the Active Test for each cylinder. It is not possible to test multiple cylinders at once.