FUEL SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK


    1. Check the fuel pump operation.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON and turn the intelligent tester main switch on.

        Note

        Do not start the engine.

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

      4. Check for pressure in the fuel inlet tube from the fuel line. Check that sounds of fuel flowing from the fuel tank can be heard. If no sounds can be heard, check the integration relay, fuel pump, ECM and wiring connectors.

    2. Inspect for fuel leak.


      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 ignition switch off.

    4. Disconnect the intelligent tester from the DLC3.

  2. CHECK FUEL PRESSURE


    1. Discharge the fuel system pressure Click here.

    2. Measure the battery voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Positive (+) terminal - Negative (-) terminal Ignition switch off 11 to 14 V
    3. Disconnect the cable from the negative (-) battery terminal.

    4. Disconnect the fuel hose from the fuel main tube Click here.

    5. A00553DE08
      Text in Illustration
      *a SST (Pressure Gauge)
      *b SST (Hose Joint)
      *c SST (Hose)
      *d SST (T Joint)
      *e SST (Fuel Tube Connector)
      *f SST (Hose Band)

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

      SST
      09268-45101   ( 09268-41250, 09268-41260, 09268-41280, 09268-41500, 09268-41700, 95336-08070 )
    6. Clean up any spilled gasoline.

    7. Connect the cable to the negative (-) battery terminal.

    8. Connect the intelligent tester to the DLC3.

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

    10. Measure the fuel pressure.

      Standard fuel pressure
      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 psi)

      • If the fuel pressure is higher than the standard value, replace the fuel pressure regulator.

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

    11. Disconnect the intelligent tester from the DLC3.

    12. Start the engine.

    13. Measure the fuel pressure at idle.

      Standard fuel pressure
      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 psi)
    14. Stop the engine.

    15. 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 higher

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

    16. After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST to prevent gasoline from spraying.

    17. Reconnect the fuel tube to the fuel main tube Click here.

    18. Install the No. 1 fuel pipe clamp to the fuel tube connector.

    19. Inspect for fuel leak Click here.