FUEL SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK


    1. Connect the GTS to the DLC3.


      1. Turn the ignition switch to ON.

        Note

        Do not start the engine.

      2. Turn the GTS on.

      3. Enter the following menus: Power train / Engine / Active Test / Control the Fuel Pump / Speed.

    2. Check the fuel pump operation.


      1. Check for pressure in the fuel inlet tube from the fuel line. Check that sound of fuel flowing in the fuel tank can be heard.

        If no sound can be heard, check the EFI MAIN 1 relay, fuel pump, ECM and wiring connector.

    3. Inspect for fuel leaks.


      1. Check that there are no fuel leaks anywhere on the system after performing maintenance.

        If there is a fuel leak, repair or replace parts as necessary.

  2. CHECK FUEL PRESSURE


    1. Check that the battery positive voltage is above 12 V.

    2. Discharge the fuel system pressure Click here.

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

      Note

      The power window system utilizes a mechanism in which the door glass moves down slightly when the door is opened, and in which the glass moves up when the door is closed the door in order to prevent the door molding from being damaged. When the battery negative (-) terminal needs to be disconnected for servicing, fully open the driver and passenger door glasses in advance.

    4. Disconnect the No. 2 fuel tube. (Direct injection side) (for metal type)


      1. A004JF9

        Loosen the hose clamp and disconnect the No. 2 fuel tube.

    5. Disconnect the No. 2 fuel hose. (Direct injection side) (for clamp type)


      1. A004IZY

        Loosen the hose clamp and disconnect the No. 2 fuel hose.

    6. Disconnect the fuel tube. (Port injection side) (for metal type)


      1. A004I3O

        Loosen the hose clamp and disconnect the fuel tube.

    7. Disconnect the fuel hose. (Port injection side) (for clamp type)


      1. A004K7N

        Loosen the hose clamp and disconnect the fuel hose.

    8. A004JIPE03
      Text in Illustration
      *1

      SST

      (Pressure Gauge)
      *2

      SST

      (Straight joint)
      *3

      SST

      (Hose)
      *4

      SST

      (T-joint)
      *5

      SST

      (Hose Band)
      *6

      SST

      (Clip)

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

      SST
      09268-31014   ( 09268-41700 )
      09268-45100   ( 09268-41250, 09268-41260, 09268-41270, 95336-08070, 96135-51300 )

    9. Wipe off any gasoline.

    10. Reconnect the cable to the negative (-) battery terminal.

    11. Operate the fuel pump.


      1. Connect the GTS to the DLC3.

      2. Turn the ignition switch to ON.

        Note

        Do not start the engine.

      3. Turn the GTS on.

      4. Enter the following menus: Power train / Engine / Active Test / Control the Fuel Pump / Speed.

    12. Measure the fuel pressure.

      Standard fuel pressure
      350 to 500 kPa (4 to 5 kgf/cm2, 51 to 73 psi)

      If the fuel pressure is higher than the specification, replace the fuel pump (built-in fuel tank).

      If the pressure is lower than the specification, check the fuel hoses, connections, and fuel pump (built-in fuel tank).

    13. Start the engine.

    14. Measure the fuel pressure when idle.

      Standard fuel pressure
      350 to 500 kPa (4 to 5 kgf/cm2, 51 to 73 psi)

      If the pressure is not as specified, check the fuel pump and injectors.

    15. Stop the engine.

    16. Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.

      Standard fuel pressure
      147 kPa (1.5 kgf/cm2, 21 psi) or more

      If the pressure is not as specified, check the fuel pump or injectors.

    17. After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST and the fuel tube connector to prevent fuel from spilling.

    18. Reconnect the No. 2 fuel tube with the clamp. (Direct injection side) (for metal type)

    19. Reconnect the No. 2 fuel hose with the clamp. (Direct injection side) (for clamp type)

    20. Reconnect the fuel tube with the clamp. (Port injection side) (for metal type)

    21. Reconnect the fuel hose with the clamp. (Port injection side) (for clamp type)

    22. Inspect for fuel leaks (Step 1).

  3. CHECK FUEL PRESSURE (for High Pressure)


    1. Connect the GTS to the DLC3.


      1. Turn the ignition switch to ON.

      2. Turn the GTS on.

    2. Start and warm up the engine.

    3. Run the engine at idle.

    4. Enter the following menus: Power train / Engine / Data List / Fuel Press.

    5. Check the high pressure side fuel pressure.

      Standard fuel pressure
      3000 to 5000 kPa (30.6 to 51.0 kgf/cm2, 435 to 725 psi)

      If the pressure is not as specified, check the fuel pump, high pressure side fuel pump, fuel pressure sensor and wirings.

    6. Stop the engine.