FUEL SYSTEM ON-VEHICLE INSPECTION


  1. CHECK FUEL PUMP OPERATION AND FUEL LEAKS


    1. When using the intelligent tester.


      1. Connect the intelligent tester to the DLC3.

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

        Note

        Do not start the engine.

      3. Select the Active Test mode on the intelligent tester.

        Tech Tips

        Refer to the intelligent tester operator's manual for further details.

    2. Check that there are no fuel leaks anywhere on the fuel system after doing maintenance.

  2. CHECK FUEL PRESSURE


    1. Discharge fuel system pressure Click here.

    2. Using a voltmeter, measure battery voltage.

      Voltage
      12 to 14 V

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

    4. Remove the fuel pipe clamp No.1 from the fuel tube connector.

    5. Disconnect the fuel hose from the fuel main tube.

    6. A0137WBE01

      Install SST (pressure gauge and fuel tube connector) as shown in the illustration.

      SST
      09268-45014   ( 09268-41200, 09268-41220, 09268-41250 )
      09268-41048   ( 90467-13001, 95336-08070, 09268-41500 )

    7. Wipe off any splattered gasoline.

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

    9. Connect the intelligent tester to the DLC3 (see step 1 in check fuel pump operation).

    10. Measure the fuel pressure.

      Fuel pressure
      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44.1 to 49.7 psi)

      If pressure is high, replace the fuel pressure regulator.

      If pressure is low, check the fuel hoses, fuel hose connections, fuel pump and fuel pressure regulator.

    11. Disconnect the intelligent tester from the DLC3.

    12. Start the engine.

    13. Measure the fuel pressure at idle.

      Fuel pressure
      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44.1 to 49.7 psi)

      If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.

    14. Stop the engine.

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

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

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

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

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

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

    19. Check for fuel leaks (step 1).