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 / Active 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 pipe. 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 assembly, 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 the fuel system pressure.

      Click here

    2. Using a voltmeter, 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. B005ARO

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

      Click here

    5. B005B3FC02
      *a SST (Hose Band)
      *b SST (T Joint)
      *c SST (Pressure Gauge)
      *d SST (Hose Joint)
      *e SST (Hose)
      *f SST (Fuel Tube Connector)

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

      SST
      09268-45101   ( 09268-41500, 09268-41260, 09268-41700, 09268-41280, 09268-41250, 95336-08070 )
    6. B0058GD

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

      Click here

    7. B0059S7C02
      *a SST (Hose Band)
      *b SST (T Joint)
      *c SST (Pressure Gauge)
      *d SST (Hose Joint)
      *e SST (Hose)
      *f SST (Fuel Tube Connector)

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

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

    8. Wipe up any spilled fuel.

    9. 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

    10. Connect the GTS to the DLC3.

    11. Turn the engine switch on (IG).

      Note

      Do not start the engine.

    12. Turn the GTS on.

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


      Powertrain > Engine > Active Test
      Tester Display
      Activate the Circuit Relay
      Standard fuel pressure
      196 to 833 kPa (2.0 to 8.5 kgf/cm2, 28 to 121 psi)

      • If fuel pressure is more than the standard, inspect the pressure discharge valve assembly.

      • If fuel pressure is less than the standard, inspect the fuel hoses and connectors, fuel pump assembly, fuel filter and fuel pressure discharge valve assembly.

    14. Start the engine.

    15. 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

    16. Stop the engine.

    17. 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

    18. Install the fuel tube sub-assembly to the fuel delivery pipe.

      Click here

    19. Install the fuel tube sub-assembly to the fuel pump assembly.

      Click here

    20. Inspect for fuel leaks.

  3. CHECK FUEL PRESSURE (for High Pressure)


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

    3. Start and warm up the engine.

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


      Powertrain > Engine > Data List
      Tester Display
      Fuel Pressure (High)
      Standard fuel pressure
      3400 to 8000 kPa (34.7 to 81.6 kgf/cm2, 493 to 1160 psi)

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


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

    3. Start the engine, then 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 this procedure with the vehicle stopped and the engine idling.

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

      Standard
      The idling speed varies.

      Tech Tips

      Perform a test for each cylinder. It is not possible to test multiple cylinders at once.