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.


        • for Rear Air Fuel Ratio Sensor:


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

        • for Rear Heated Oxygen Sensor:


        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. Remove the No. 1 engine cover sub-assembly.

      Click here

    5. Disconnect the No. 2 fuel tube sub-assembly (for Direct Injection).


      1. B007XTI

        Disconnect the No. 2 fuel tube sub-assembly from the fuel pump assembly.

        Click here

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


      1. B007XFQ

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

        Click here

    7. B007YOWC01
      *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 )

    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 / Activate the Circuit Relay.


      • for Rear Air Fuel Ratio Sensor:


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

      • for Rear Heated Oxygen Sensor:


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

    14. Measure the fuel pressure.

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

      1. for Rear Air Fuel Ratio Sensor:


        • If the fuel pressure is more than the standard, replace the fuel main valve assembly.

        • 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.

      2. for Rear Heated Oxygen Sensor:


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

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

    15. Disconnect the GTS from the DLC3.

    16. Start the engine.

    17. 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

    18. Stop the engine.

    19. 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

      1. for Rear Air Fuel Ratio Sensor:


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

      2. for Rear Heated Oxygen Sensor:


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

    20. 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

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


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

        Click here

    22. Connect the No. 2 fuel tube sub-assembly (for Direct Injection).


      1. Connect the No. 2 fuel tube sub-assembly to the fuel pump assembly.

        Click here

    23. Install the No. 1 engine cover sub-assembly.

      Click here

    24. 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. Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Coolant Temperature, Fuel Pressure (High) and Injection Mode.


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

    5. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.

    6. Read Fuel Pressure (High) with the engine speed at 3000 rpm.

      Standard
      GTS Display Condition Specified Condition
      Fuel Pressure (High)

      • Shift position: P

      • A/C: Off

      • Engine warmed up

      • Engine Speed: 3000 rpm

      • Injection Mode: Direct

      		 4000 to 8000 kPag

      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.