FUEL SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. CHECK FUEL PUMP OPERATION AND FOR FUEL LEAKS


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

      Note

      Do not start the engine.

    3. Turn the intelligent tester on.

    4. Select the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

    5. Check the fuel pump operation.


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

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

    6. Check 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 auxiliary battery negative (-) terminal.

      Note


      • After turning the power switch off, waiting time may be required before disconnecting the cable from the auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the auxiliary battery terminal notice before proceeding with work Click here

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

    4. Remove the service plug grip.

    5. When checking the fuel pressure of the direct injection side:

      Disconnect the fuel pump main tube.


      1. A000YNL

        Remove the fuel pipe clamp.

      2. A000UXOE01
        *1 Pull
        *2 Pinch

        Pinch the connector and pull the fuel tube Click here.

        CAUTION:


        • Always read the precautions Click here before disconnecting the fuel tube connector (quick type A).

        • The fuel tube may spray fuel as a result of pressure that remains in the tube. Do not allow fuel to be sprayed in the engine compartment.

    6. When checking the fuel pressure of the port injection side:

      Disconnect the fuel pump main tube.


      1. A000Z72

        Remove the fuel pipe clamp.

      2. A000ZF9E07
        *1 Pull
        *2 Pinch

        Pinch the connector and pull the fuel tube.

        CAUTION:


        • Always read the precautions Click here before disconnecting the fuel tube connector (quick type A).

        • The fuel tube may spray fuel as a result of pressure that remains in the tube. Do not allow fuel to be sprayed in the engine compartment.

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

      SST
      09268-45101   ( 09268-41250, 09268-41260, 09268-41280, 09268-41500, 09268-41700, 95336-08070 )
      A000ZXQE05

    8. Wipe off any gasoline.

    9. Reconnect the cable to the auxiliary battery negative (-) terminal.

      Note

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

    10. Remove the service plug grip.

    11. Operate the fuel pump.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the power switch on (IG).

        Note

        Do not start the engine.

      3. Turn the intelligent tester on.

      4. Select the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

    12. 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 higher than the specification, replace the fuel pump (built into fuel tank).

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

    13. Connect the intelligent tester to the DLC3.

    14. Put the engine in inspection mode Click here.

    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)

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

    17. Stop the engine.

    18. 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.

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

    20. Reconnect the fuel pump main tube Click here.

    21. Check for fuel leaks.

  3. CHECK FUEL PRESSURE (for High Pressure)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Put the engine in inspection mode Click here.

    5. Warm up the engine.

    6. Run the engine at idle.

    7. Select the following menus: Powertrain / Engine and ECT / Fuel Press / Speed.

    8. 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, high pressure side fuel pump, fuel delivery pipe assembly LH (fuel pressure sensor) and wirings.

    9. Stop the engine.