FUEL SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK


    1. Check fuel pump with filter assembly 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 and ECT / Active Test / Control the Fuel Pump / Speed.


        Powertrain > Engine and ECT > Active Test
        Tester Display
        Control the Fuel Pump / Speed

      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 integration relay, fuel pump with filter 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 fuel system pressure.

      Click here

    2. Using a voltmeter, measure the battery voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Positive terminal - Negative terminal Engine switch off 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. B003VZW

      Remove the fuel pipe clamp.

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

      Click here

    6. B003W6RC07
      *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 and ECT / Active Test / Control the Fuel Pump / Speed.


      Powertrain > Engine and ECT > Active Test
      Tester Display
      Control the Fuel Pump / Speed

    13. Measure the fuel pressure.

      Standard Fuel Pressure
      196 to 588 kPa (2.0 to 6.0 kgf/cm2, 28 to 85 psi)

      • If the fuel pressure is greater than the standard, replace the fuel pressure regulator assembly.

      • If the fuel pressure is less than the standard, check the fuel hoses and connections, fuel pump with filter assembly, fuel filter and fuel pressure regulator assembly.

    14. Disconnect the GTS from the DLC3.

    15. Start the engine.

    16. Measure the fuel pressure at idle.

      Standard Fuel Pressure
      196 to 588 kPa (2.0 to 6.0 kgf/cm2, 28 to 85 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 after the engine stops.

      Standard Fuel Pressure
      147 kPa (1.5 kgf/cm2, 21 psi) or more

      If the fuel pressure is not as specified, check the fuel pump with filter assembly, fuel pressure regulator assembly and/or 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 to the fuel pipe.

    21. Install the fuel pipe clamp to the fuel tube connector.

    22. Inspect for fuel leaks.

  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 and ECT / Data List / Fuel Press.


      Powertrain > Engine > Data List
      Tester Display
      Fuel Press

    6. Check the high pressure side fuel pressure.

      Standard Fuel Pressure
      3500 to 4500 kPa (35.7 to 45.9 kgf/cm2, 508 to 653 psi)

      If the pressure is not as specified, check the fuel pump with filter assembly, high pressure side fuel pump assembly, fuel delivery pipe sub-assembly (fuel pressure sensor) and wirings.

    7. Stop the engine.